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Hentati D, Ramadan AR, Abed RMM, Abotalib N, El Nayal AM, Ismail W. Functional and structural responses of a halophilic consortium to oily sludge during biodegradation. Appl Microbiol Biotechnol 2024; 108:116. [PMID: 38229295 DOI: 10.1007/s00253-023-12896-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 10/23/2023] [Accepted: 11/27/2023] [Indexed: 01/18/2024]
Abstract
Biotreatment of oily sludge and the involved microbial communities, particularly in saline environments, have been rarely investigated. We enriched a halophilic bacterial consortium (OS-100) from petroleum refining oily sludge, which degraded almost 86% of the aliphatic hydrocarbon (C10-C30) fraction of the oily sludge within 7 days in the presence of 100 g/L NaCl. Two halophilic hydrocarbon-degrading bacteria related to the genera Chromohalobacter and Halomonas were isolated from the OS-100 consortium. Hydrocarbon degradation by the OS-100 consortium was relatively higher compared to the isolated bacteria, indicating potential synergistic interactions among the OS-100 community members. Exclusion of FeCl2, MgCl2, CaCl2, trace elements, and vitamins from the culture medium did not significantly affect the hydrocarbon degradation efficiency of the OS-100 consortium. To the contrary, hydrocarbon biodegradation dropped from 94.1 to 54.4% and 5% when the OS-100 consortium was deprived from phosphate and nitrogen sources in the culture medium, respectively. Quantitative PCR revealed that alkB gene expression increased up to the 3rd day of incubation with 11.277-fold, consistent with the observed increments in hydrocarbon degradation. Illumina-MiSeq sequencing of 16 S rRNA gene fragments revealed that the OS-100 consortium was mainly composed of the genera Halomonas, Idiomarina, Alcanivorax and Chromohalobacter. This community structure changed depending on the culturing conditions. However, remarkable changes in the community structure were not always associated with remarkable shifts in the hydrocarbonoclastic activity and vice versa. The results show that probably synergistic interactions between community members and different subpopulations of the OS-100 consortium contributed to salinity tolerance and hydrocarbon degradation.
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Affiliation(s)
- Dorra Hentati
- Environmental Biotechnology Program, Life Sciences Department, College of Graduate Studies, Arabian Gulf University, Manama, Bahrain
| | - Ahmed R Ramadan
- Health Biotechnology Program, Life Sciences Department, College of Graduate Studies, Arabian Gulf University, Manama, Bahrain
| | - Raeid M M Abed
- Biology Department, College of Science, Sultan Qaboos University, Muscat, Oman
| | - Nasser Abotalib
- Environmental Biotechnology Program, Life Sciences Department, College of Graduate Studies, Arabian Gulf University, Manama, Bahrain
| | - Ashraf M El Nayal
- Environmental Biotechnology Program, Life Sciences Department, College of Graduate Studies, Arabian Gulf University, Manama, Bahrain
| | - Wael Ismail
- Environmental Biotechnology Program, Life Sciences Department, College of Graduate Studies, Arabian Gulf University, Manama, Bahrain.
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2
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Herrero OM, Alvarez HM. Fruit residues as substrates for single-cell oil production by Rhodococcus species: physiology and genomics of carbohydrate catabolism. World J Microbiol Biotechnol 2024; 40:61. [PMID: 38177966 DOI: 10.1007/s11274-023-03866-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 12/03/2023] [Indexed: 01/06/2024]
Abstract
Strains belonging to R. opacus, R. jostii, R. fascians, R. erythropolis and R. equi exhibited differential ability to grow and produce lipids from fruit residues (grape marc and apple pomace), as well as single carbohydrates, such as glucose, gluconate, fructose and sucrose. The oleaginous species, R. opacus (strains PD630 and MR22) and R. jostii RHA1, produced higher yields of biomass (5.1-5.6 g L-1) and lipids (38-44% of CDW) from apple juice wastes, in comparison to R. erythropolis DSM43060, R. fascians F7 and R. equi ATCC6939 (4.1-4.3 g L-1 and less than 10% CDW of lipids). The production of cellular biomass and lipids were also higher in R. opacus and R. jostii (6.8-7.2 g L-1 and 33.9-36.5% of CDW of lipids) compared to R. erythropolis, R. fascians, and R. equi (3.0-3.6 g L-1 and less than 10% CDW of lipids), during cultivation of cells on wine grape waste. A genome-wide bioinformatic analysis of rhodococci indicated that oleaginous species possess a complete set of genes/proteins necessary for the efficient utilization of carbohydrates, whereas genomes from non-oleaginous rhodococcal strains lack relevant genes coding for transporters and/or enzymes for the uptake, catabolism and assimilation of carbohydrates, such as gntP, glcP, edd, eda, among others. Results of this study highlight the potential use of the oleaginous rhodococcal species to convert sugar-rich agro-industrial wastes, such as apple pomace and grape marc, into single-cell oils.
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Affiliation(s)
- O Marisa Herrero
- Instituto de Biociencias de la Patagonia (INBIOP), Universidad Nacional de la Patagonia San Juan Bosco y CONICET, Km 4-Ciudad Universitaria, 9000, Comodoro Rivadavia, Chubut, Argentina
| | - Héctor M Alvarez
- Instituto de Biociencias de la Patagonia (INBIOP), Universidad Nacional de la Patagonia San Juan Bosco y CONICET, Km 4-Ciudad Universitaria, 9000, Comodoro Rivadavia, Chubut, Argentina.
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3
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El-Shall H, Abu-Serie M, Abu-Elreesh G, Eltarahony M. Unveiling the anticancer potentiality of single cell oils produced by marine oleaginous Paradendryphiella sp. under optimized economic growth conditions. Sci Rep 2023; 13:20773. [PMID: 38008815 PMCID: PMC10679151 DOI: 10.1038/s41598-023-47656-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 11/16/2023] [Indexed: 11/28/2023] Open
Abstract
Bioprospecting about new marine oleaginous fungi that produce advantageous bioproducts in a green sustainable process is the key of blue bioeconomy. Herein, the marine Paradendryphiella sp. was utilized for single cell oils (SCOs) production economically, via central composite design, the lipid content enhanced 2.2-fold by 5.5 g/L lipid yeild on seawater-based media supplemented with molasses concentration 50 g/L, yeast extract, 2.25 g/L at initial pH value (5.3) and 8 days of static incubation. Subsequently, the fatty acid methyl esters profiles of SCOs produced on optimized media under different abiotic conditions were determined; signifying qualitative and quantitative variations. Interestingly, the psychrophilic-prolonged incubation increased the unsaturation level of fatty acids to 59.34%, while ω-6 and ω-3 contents representing 23.53% and 0.67% respectively. Remarkably, it exhibited the highest EC100 dose by 677.03 µg/mL on normal human lung fibroblast Wi-38 cells. Meanwhile, it showed the highest inhibiting proliferation potential on cancer cell lines of A549, MDA-MB 231 and HepG-2 cells by 372.37, 417.48 and 365.00 µg/mL, respectively. Besides, it elevated the oxidative stress, the expression of key apoptotic genes and suppressed the expression of key oncogenes (NF-κB, BCL2 and cyclin D); implying its promising efficacy in cancer treatment as adjuvant drug. This study denoted the lipogenesis capacity of Paradendryphiella sp. under acidic/alkaline and psychrophilic/mesophilic conditions. Hereby attaining efficient and economic process under seasonal variation with different Egyptian marine sources to fill the gap of freshwater crisis and simultaneously preserve energy.
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Affiliation(s)
- Hadeel El-Shall
- Environmental Biotechnology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, Alexandria, 21934, Egypt
| | - Marwa Abu-Serie
- Medical Biotechnology Department, Genetic Engineering and Biotechnology Research Institute, (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, Alexandria, 21934, Egypt
| | - Gadallah Abu-Elreesh
- Environmental Biotechnology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, Alexandria, 21934, Egypt
| | - Marwa Eltarahony
- Environmental Biotechnology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, Alexandria, 21934, Egypt.
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Wang K, Zhao W, Lin L, Wang T, Wei P, Ledesma-Amaro R, Zhang AH, Ji XJ. A robust soft sensor based on artificial neural network for monitoring microbial lipid fermentation processes using Yarrowia lipolytica. Biotechnol Bioeng 2023; 120:1015-1025. [PMID: 36522163 DOI: 10.1002/bit.28310] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/07/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
Microbial oils produced by Yarrowia lipolytica offer an environmentally friendly and sustainable alternative to petroleum as well as traditional lipids from animals and plants. The accurate measurement of fermentation parameters, including the substrate concentration, dry cell weight, and lipid accumulation, is the foundation of process control, which is indispensable for industrial lipid production. However, it remains a great challenge to measure the complex parameters online during the lipid fermentation process, which is nonlinear, multivariate, and characterized by strong coupling. As a type of AI technology, the artificial neural network model is a powerful tool for handling extremely complex problems, and it can be employed to develop a soft sensor to monitor the microbial lipid fermentation process of Y. lipolytica. In this study, we first analyzed and emphasized the volume of sodium hydroxide and dissolved oxygen concentration as central parameters of the fermentation process. Then, a soft sensor based on a four-input artificial neural network model was developed, in which the input variables were fermentation time, dissolved oxygen concentration, initial glucose concentration, and additional volume of sodium hydroxide. This provides the possibility of online monitoring of dry cell weight, glucose concentration, and lipid production with high accuracy, which can be extended to similar fermentation processes characterized by the addition of bases or acids, as well as changes of the dissolved oxygen concentration.
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Affiliation(s)
- Kaifeng Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, People's Republic of China
| | - Wenyang Zhao
- Institute of Network and Cloud Computing Technology, College of Computer Science and Technology, Nanjing Tech University, Nanjing, People's Republic of China
| | - Lu Lin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, People's Republic of China
| | - Tianjing Wang
- Institute of Network and Cloud Computing Technology, College of Computer Science and Technology, Nanjing Tech University, Nanjing, People's Republic of China
| | - Ping Wei
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, People's Republic of China
| | - Rodrigo Ledesma-Amaro
- Department of Bioengineering and Imperial College Centre for Synthetic Biology, Imperial College London, London, UK
| | - Ai-Hui Zhang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China
| | - Xiao-Jun Ji
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, People's Republic of China
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Peng L, Nadal C, Gautrot JE. Growth of mesenchymal stem cells at the surface of silicone, mineral and plant-based oils. Biomed Mater 2023; 18. [PMID: 36808917 DOI: 10.1088/1748-605x/acbdda] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 02/21/2023] [Indexed: 02/23/2023]
Abstract
Bioemulsions are attractive platforms for the expansion of adherent cells in bioreactors. Their design relies on the self-assembly of protein nanosheets at liquid-liquid interfaces, displaying strong interfacial mechanical properties and promoting integrin-mediated cell adhesion. However, most systems developed to date have focused on fluorinated oils, which are unlikely to be accepted for direct implantation of resulting cell products for regenerative medicine, and protein nanosheets self-assembly at other interfaces has not been investigated. In this report, the composition of aliphatic pro-surfactants palmitoyl chloride and sebacoyl chloride, on the assembly kinetics of poly(L-lysine) at silicone oil interfaces and characterisation of ultimate interfacial shear mechanics and viscoelasticity is presented. The impact of the resulting nanosheets on the adhesion of mesenchymal stem cells (MSCs) is investigated via immunostaining and fluorescence microscopy, demonstrating the engagement of the classic focal adhesion-actin cytoskeleton machinery. The ability of MSCs to proliferate at the corresponding interfaces is quantified. In addition, expansion of MSCs at other non-fluorinated oil interfaces, based on mineral and plant-based oils is investigated. Finally, the proof-of-concept of such non-fluorinated oil systems for the formulation of bioemulsions supporting stem cell adhesion and expansion is demonstrated.
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Affiliation(s)
- Lihui Peng
- Institute of Bioengineering, University of London, Mile End Road, London E1 4NS, United Kingdom
- School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London E1 4NS, United Kingdom
| | - Clémence Nadal
- Institute of Bioengineering, University of London, Mile End Road, London E1 4NS, United Kingdom
- School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London E1 4NS, United Kingdom
| | - Julien E Gautrot
- Institute of Bioengineering, University of London, Mile End Road, London E1 4NS, United Kingdom
- School of Engineering and Materials Science, Queen Mary, University of London, Mile End Road, London E1 4NS, United Kingdom
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Choe C, Schleusener J, Ri J, Choe S, Kim P, Lademann J, Darvin ME. Quantitative determination of concentration profiles of skin components and topically applied oils by tailored multivariate curve resolution-alternating least squares using in vivo confocal Raman micro-spectroscopy. J Biophotonics 2023; 16:e202200219. [PMID: 36106843 DOI: 10.1002/jbio.202200219] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/01/2022] [Accepted: 09/12/2022] [Indexed: 06/15/2023]
Abstract
The main components of the stratum corneum (SC), water, lipids, and proteins, are non-homogeneously distributed throughout the depth. The quantitative determination of their concentration profiles and penetration depth of topically applied substances are urgent topics of dermatological and cosmetic research. Confocal Raman micro-spectroscopy has distinct advantages when determining semi-quantitative concentrations of SC components and topically applied substances non-invasively and in vivo. In this work, we applied a tailored multivariate curve resolution-alternating least squares (tMCR-ALS) method to analyze Raman spectra of the SC in the 2000-4000 cm-1 region for quantitatively determining the concentrations of water, lipids, proteins, and topically applied oils using substance-related spectral loadings which were allowed to change depth-dependently from the SC's surface toward its bottom. tMCR-ALS makes matching of depth-dependent signal attenuation, that is, the normalization on keratin, unnecessary and requires only a few additional experiments for calibration - Raman spectra of the pure materials and their densities.
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Affiliation(s)
- ChunSik Choe
- Biomedical Materials Division, Faculty of Material Science, Kim Il Sung University, Pyongyang, Democratic People's Republic of Korea
| | - Johannes Schleusener
- Department of Dermatology, Venerology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - JinSong Ri
- Biomedical Materials Division, Faculty of Material Science, Kim Il Sung University, Pyongyang, Democratic People's Republic of Korea
| | - SeHyok Choe
- Biomedical Materials Division, Faculty of Material Science, Kim Il Sung University, Pyongyang, Democratic People's Republic of Korea
- Clinical Research Division, Pyongyang Cosmetic Research Institute, Pyongyang, Democratic People's Republic of Korea
| | - PokSil Kim
- Clinical Research Division, Pyongyang Cosmetic Research Institute, Pyongyang, Democratic People's Republic of Korea
| | - Jürgen Lademann
- Department of Dermatology, Venerology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Maxim E Darvin
- Department of Dermatology, Venerology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
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Abstract
Oils are among the most important agricultural commodities and have wide applications in food/nutrition, biofuels, and oleochemicals. The oleaginous microalga Nannochloropsis oceanica can produce large amounts of oils and the high-value ω-3 eicosapentaenoic acid, which represents a promising resource for oil production targeting biodiesel, nutraceutical, and aquaculture industries. In recent years, with the availability of omics databases and the development of genetic tools, N. oceanica has been extensively investigated as a model photosynthetic organism for studying lipid metabolism and as a green cellular factory to produce lipids for industrial applications. This review summarizes the current knowledge on the lipid composition and biosynthetic pathways of N. oceanica and reviews the recent advances in metabolic engineering of lipid production in this microalga.
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Affiliation(s)
- Yang Xu
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
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Li T, Sun Y, Chen Y, Gao Y, Gao H, Liu B, Xue J, Li R, Jia X. Characterisation of two novel genes encoding Δ 9 fatty acid desaturases (CeSADs) for oleic acid accumulation in the oil-rich tuber of Cyperus esculentus. Plant Sci 2022; 319:111243. [PMID: 35487651 DOI: 10.1016/j.plantsci.2022.111243] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 03/02/2022] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
Cyperus esculentus is considered one of the most promising oil crops due to its oil-rich tuber, wide adaptability and large biomass production. Preferable triacylglycerol (TAG) composition, especially high oleic acid content, makes tuber oil suitable for human consumption and biodiesel production. However, the mechanism underlying oleic acid enrichment in the tuber remains unknown. Plastidial stearoyl-ACP desaturase (SAD) catalyses the formation of monounsaturated fatty acids (MUFAs), which may function crucially for high accumulation of oleic acid in C. esculentus tubers. In this study, two full-length cDNAs encoding SAD were isolated from the developing tubers of C. esculentus, namely, CeSAD1 and CeSAD2, with ORFs of 1194 bp and 1161 bp, respectively. Quantitative RT-PCR analysis showed that CeSAD genes were highly expressed in tubers. The expression pattern during tuber formation was also significantly correlated with fatty acid and oil accumulation dynamics. Overexpression of each CeSAD gene could restore the normal growth of the defective yeast BY4389, indicating that both CeSADs had fatty acid desaturase activity to catalyse MUFA biosynthesis. A tobacco genetic transformation assay demonstrated that both CeSAD enzymes had high enzyme activity. Exogenous addition of exogenous fatty acids to feed yeast revealed that CeSAD1 has a more substantial substrate preference ratio for C18:0 than CeSAD2 did. Moreover, the overexpression of CeSAD1 significantly increased host tolerance against low-temperature stress. Our data add new insights into the deep elucidation of oleic acid-enriched oils in Cyperus esculentus tubers, showing CeSAD, especially CeSAD1, as the target gene in genetic modification to increase oil and oleic yields in oil crops as well as stress tolerance.
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Affiliation(s)
- Teng Li
- College of Agronomy/Institute of Molecular Agriculture and Bioenergy, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Yan Sun
- College of Agronomy/Institute of Molecular Agriculture and Bioenergy, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Ying Chen
- College of Agronomy/Institute of Molecular Agriculture and Bioenergy, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Yu Gao
- College of Agronomy/Institute of Molecular Agriculture and Bioenergy, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Huiling Gao
- College of Agronomy/Institute of Molecular Agriculture and Bioenergy, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Baoling Liu
- College of Agronomy/Institute of Molecular Agriculture and Bioenergy, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Jinai Xue
- College of Agronomy/Institute of Molecular Agriculture and Bioenergy, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Runzhi Li
- College of Agronomy/Institute of Molecular Agriculture and Bioenergy, Shanxi Agricultural University, Taigu, Shanxi 030801, China.
| | - Xiaoyun Jia
- College of Agronomy/Institute of Molecular Agriculture and Bioenergy, Shanxi Agricultural University, Taigu, Shanxi 030801, China.
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Xue Z, Li S, Yu W, Gao X, Zheng X, Yu Y, Kou X. Research advancement and commercialization of microalgae edible oil: a review. J Sci Food Agric 2021; 101:5763-5774. [PMID: 34148229 DOI: 10.1002/jsfa.11390] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 06/14/2021] [Accepted: 06/19/2021] [Indexed: 06/12/2023]
Abstract
The global food crisis has led to a great deal of attention being given to microalgal oil as a sustainable natural food source. This article provides an overview of the progress and future directions in promoting the commercialization of microalgal edible oils, including microalgal triglyceride accumulation, suitable edible oil culture strategies for high nutritional value, metabolic engineering, production, and downstream technologies. The integration of the production process, biosafety, and the economic sustainability of microalgal oil production are analyzed for their critical roles in the commercialization of microalgal edible oil to provide a theoretical and scientific basis for the comprehensive development and utilization of microalgal edible oil. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Zhaohui Xue
- Functional Food Laboratory, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Shihao Li
- Functional Food Laboratory, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Wancong Yu
- Medicinal Plant Laboratory, Biotechnology Research Institute, Tianjin Academy of Agricultural Sciences, Tianjin, China
| | - Xin Gao
- Functional Food Laboratory, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Xu Zheng
- Functional Food Laboratory, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Yue Yu
- Functional Food Laboratory, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Xiaohong Kou
- Functional Food Laboratory, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
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Deragon E, Schuler M, Aiese Cigliano R, Dellero Y, Si Larbi G, Falconet D, Jouhet J, Maréchal E, Michaud M, Amato A, Rébeillé F. An Oil Hyper-Accumulator Mutant Highlights Peroxisomal ATP Import as a Regulatory Step for Fatty Acid Metabolism in Aurantiochytrium limacinum. Cells 2021; 10:2680. [PMID: 34685660 PMCID: PMC8534400 DOI: 10.3390/cells10102680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/24/2021] [Accepted: 09/24/2021] [Indexed: 11/17/2022] Open
Abstract
Thraustochytrids are marine protists that naturally accumulate triacylglycerol with long chains of polyunsaturated fatty acids, such as ω3-docosahexaenoic acid (DHA). They represent a sustainable response to the increasing demand for these "essential" fatty acids (FAs). Following an attempt to transform a strain of Aurantiochytrium limacinum, we serendipitously isolated a clone that did not incorporate any recombinant DNA but contained two to three times more DHA than the original strain. Metabolic analyses indicated a deficit in FA catabolism. However, whole transcriptome analysis did not show down-regulation of genes involved in FA catabolism. Genome sequencing revealed extensive DNA deletion in one allele encoding a putative peroxisomal adenylate transporter. Phylogenetic analyses and yeast complementation experiments confirmed the gene as a peroxisomal adenylate nucleotide transporter (AlANT1), homologous to yeast ScANT1 and plant peroxisomal adenylate nucleotide carrier AtPNC genes. In yeast and plants, a deletion of the peroxisomal adenylate transporter inhibits FA breakdown and induces FA accumulation, a phenotype similar to that described here. In response to this metabolic event, several compensatory mechanisms were observed. In particular, genes involved in FA biosynthesis were upregulated, also contributing to the high FA accumulation. These results support AlANT1 as a promising target for enhancing DHA production in Thraustochytrids.
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Affiliation(s)
- Etienne Deragon
- Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CNRS, CEA, INRAE, CEDEX 9, 38054 Grenoble, France; (E.D.); (M.S.); (Y.D.); (G.S.L.); (D.F.); (J.J.); (E.M.); (M.M.)
| | - Martin Schuler
- Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CNRS, CEA, INRAE, CEDEX 9, 38054 Grenoble, France; (E.D.); (M.S.); (Y.D.); (G.S.L.); (D.F.); (J.J.); (E.M.); (M.M.)
| | | | - Younès Dellero
- Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CNRS, CEA, INRAE, CEDEX 9, 38054 Grenoble, France; (E.D.); (M.S.); (Y.D.); (G.S.L.); (D.F.); (J.J.); (E.M.); (M.M.)
- Institute of Genetic, Environment and Plant Protection, UMR 1349 IGEPP INRA, Agrocampus Ouest Rennes, Université Rennes 1, Domaine de la Motte BP35327, CEDEX, 35653 Le Rheu, France
| | - Gregory Si Larbi
- Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CNRS, CEA, INRAE, CEDEX 9, 38054 Grenoble, France; (E.D.); (M.S.); (Y.D.); (G.S.L.); (D.F.); (J.J.); (E.M.); (M.M.)
| | - Denis Falconet
- Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CNRS, CEA, INRAE, CEDEX 9, 38054 Grenoble, France; (E.D.); (M.S.); (Y.D.); (G.S.L.); (D.F.); (J.J.); (E.M.); (M.M.)
| | - Juliette Jouhet
- Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CNRS, CEA, INRAE, CEDEX 9, 38054 Grenoble, France; (E.D.); (M.S.); (Y.D.); (G.S.L.); (D.F.); (J.J.); (E.M.); (M.M.)
| | - Eric Maréchal
- Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CNRS, CEA, INRAE, CEDEX 9, 38054 Grenoble, France; (E.D.); (M.S.); (Y.D.); (G.S.L.); (D.F.); (J.J.); (E.M.); (M.M.)
| | - Morgane Michaud
- Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CNRS, CEA, INRAE, CEDEX 9, 38054 Grenoble, France; (E.D.); (M.S.); (Y.D.); (G.S.L.); (D.F.); (J.J.); (E.M.); (M.M.)
| | - Alberto Amato
- Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CNRS, CEA, INRAE, CEDEX 9, 38054 Grenoble, France; (E.D.); (M.S.); (Y.D.); (G.S.L.); (D.F.); (J.J.); (E.M.); (M.M.)
| | - Fabrice Rébeillé
- Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CNRS, CEA, INRAE, CEDEX 9, 38054 Grenoble, France; (E.D.); (M.S.); (Y.D.); (G.S.L.); (D.F.); (J.J.); (E.M.); (M.M.)
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11
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Alvarez HM, Hernández MA, Lanfranconi MP, Silva RA, Villalba MS. Rhodococcus as Biofactories for Microbial Oil Production. Molecules 2021; 26:molecules26164871. [PMID: 34443455 PMCID: PMC8401914 DOI: 10.3390/molecules26164871] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 01/20/2023] Open
Abstract
Bacteria belonging to the Rhodococcus genus are frequent components of microbial communities in diverse natural environments. Some rhodococcal species exhibit the outstanding ability to produce significant amounts of triacylglycerols (TAG) (>20% of cellular dry weight) in the presence of an excess of the carbon source and limitation of the nitrogen source. For this reason, they can be considered as oleaginous microorganisms. As occurs as well in eukaryotic single-cell oil (SCO) producers, these bacteria possess specific physiological properties and molecular mechanisms that differentiate them from other microorganisms unable to synthesize TAG. In this review, we summarized several of the well-characterized molecular mechanisms that enable oleaginous rhodococci to produce significant amounts of SCO. Furthermore, we highlighted the ability of these microorganisms to degrade a wide range of carbon sources coupled to lipogenesis. The qualitative and quantitative oil production by rhodococci from diverse industrial wastes has also been included. Finally, we summarized the genetic and metabolic approaches applied to oleaginous rhodococci to improve SCO production. This review provides a comprehensive and integrating vision on the potential of oleaginous rhodococci to be considered as microbial biofactories for microbial oil production.
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12
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da Cunha Abreu Xavier M, Teixeira Franco T. Obtaining hemicellulosic hydrolysate from sugarcane bagasse for microbial oil production by Lipomyces starkeyi. Biotechnol Lett 2021; 43:967-979. [PMID: 33517513 DOI: 10.1007/s10529-021-03080-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 01/12/2021] [Indexed: 02/06/2023]
Abstract
OBJECTIVE The extraction of the hemicellulose fraction of sugarcane bagasse (SCB) by acid hydrolysis was evaluated in an autoclave and a Parr reactor aiming the application of the hydrolysate as a carbon source for lipid production by Lipomyces starkeyi. RESULTS The hydrolysis that resulted in the highest sugar concentration was obtained by treatment in the Parr reactor (HHR) at 1.5% (m/v) H2SO4 and 120 °C for 20 min, reaching a hemicellulose conversion of approximately 82%. The adaptation of the yeast to the hydrolysate provided good fermentability and no lag phase. The fermentation of hemicellulose-derived sugars (HHR) by L. starkeyi resulted in a 27.8% (w/w) lipid content and YP/S of 0.16 g/l.h. Increasing the inoculum size increased the lipid content by approximately 61%, reaching 44.8% (w/w). CONCLUSION The hemicellulose hydrolysate from SCB is a potential substrate for L. starkeyi to produce lipids for biodiesel synthesis based on the biorefinery concept.
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Affiliation(s)
- Michelle da Cunha Abreu Xavier
- Department of Bioprocess Engineering and Biotechnology, Federal University of Tocantins (UFT), Badejos Street 69-72, Jardim Cervilha, Gurupi, TO, 77404-970, Brazil.
| | - Telma Teixeira Franco
- Department of Process Engineering (DEPro), School of Chemical Engineering, State University of Campinas (UNICAMP), Albert Einstein Avenue, 500, Zeferino Vaz University City, Campinas, SP, 13083-852, Brazil
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13
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Na BR, Lee JH. In Vitro and In Vivo Digestibility of Soybean, Fish, and Microalgal Oils, and Their Influences on Fatty Acid Distribution in Tissue Lipid of Mice. Molecules 2020; 25:E5357. [PMID: 33212752 PMCID: PMC7697985 DOI: 10.3390/molecules25225357] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/10/2020] [Accepted: 11/12/2020] [Indexed: 12/30/2022] Open
Abstract
The digestion rates of microalgal (docosahexaenoic acid, DHA, 56.8%; palmitic acid, 22.4%), fish (DHA, 10.8%; eicosapentaenoic acid, EPA, 16.2%), and soybean oils (oleic, 21.7%; linoleic acid, 54.6%) were compared by coupling the in vitro multi-step and in vivo apparent digestion models using mice. The in vitro digestion rate estimated based on the released free fatty acids content was remarkably higher in soybean and fish oils than in microalgal oil in 30 min; however, microalgal and fish oils had similar digestion rates at longer digestion. The in vivo digestibility of microalgal oil (91.49%) was lower than those of soybean (96.50%) and fish oils (96.99%). Among the constituent fatty acids of the diet oils, docosapentaenoic acid (DPA) exhibited the highest digestibility, followed by EPA, DHA, palmitoleic, oleic, palmitic, and stearic acid, demonstrating increased digestibility with reduced chain length and increased unsaturation degree of fatty acid. The diet oils affected the deposition of fatty acids in mouse tissues, and DHA concentrations were high in epididymal fat, liver, and brain of mice fed microalgal oil. In the present study, microalgal oil showed lower in vitro and in vivo digestibility, despite adequate DHA incorporation into major mouse organs, such as the brain and liver.
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Affiliation(s)
| | - Jeung-Hee Lee
- Department of Food and Nutrition, Daegu University, Gyeongsan-si 38453, Korea;
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14
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Ingram HR, Winterburn JB. Anabolism of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) by Cupriavidus necator DSM 545 from spent coffee grounds oil. N Biotechnol 2020; 60:12-19. [PMID: 32846214 DOI: 10.1016/j.nbt.2020.08.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/12/2020] [Accepted: 08/19/2020] [Indexed: 01/24/2023]
Abstract
Oil extracted from spent coffee grounds (SCG) [yield 16.8 % (w/w)] was discovered to be a highly suitable carbon substrate for the biosynthesis of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(3HB-co-3 HV)] copolymers by Cupriavidus necator DSM 545 in the absence of any traditional 3 HV precursors. Cells cultivated in a 3 L bioreactor (batch) reached a total biomass concentration of 8.9 g L-1 with a P(3HB-co-3 HV) (6.8 mol% 3 HV) content of 89.6 % (w/w). In contrast, cells grown on sunflower oil reached a total biomass concentration of 9.4 gL-1 with a P(3HB-co-3 HV) (0.2 mol% 3 HV) content of 88.1 % (w/w). It is proposed that the organism could synthesize 3 HV monomers from succinyl CoA, an intermediate of the tricarboxylic acid (TCA) cycle, via the succinate-propionate metabolic pathway.
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Affiliation(s)
- Haydn Rhys Ingram
- Department of Chemical Engineering and Analytical Science, The Mill, The University of Manchester, Manchester, M13 9PL, UK
| | - James Benjamin Winterburn
- Department of Chemical Engineering and Analytical Science, The Mill, The University of Manchester, Manchester, M13 9PL, UK.
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15
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Das S, Behera S, Balasubramanian S. Orientational Switch of the Lipase A Enzyme at the Oil-Water Interface: An Order of Magnitude Increase in Turnover Rate with a Single Surfactant Tag Explained. J Phys Chem Lett 2020; 11:2977-2982. [PMID: 32202805 DOI: 10.1021/acs.jpclett.0c00470] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Interfacially active lipases can be immobilized at a biphasic interface to enhance turnover recyclability and to facilitate product separation. Extensive coarse-grained molecular dynamics simulations of lipase A (LipA) from Bacillus subtilis show a bimodal orientational distribution of the enzyme at an oil-water interface, arising from its ellipsoidal Janus particle-like character. The relative orientational preference can be tuned by pH. The simulations rationalize a rare experimental observation of an order of magnitude increase in the turnover rate of this lipase upon its noncovalent tagging by a single surfactant molecule at the interface, compared to its rate in bulk water. The adsorption free energy, the interfacial activation, a decrease in the number of orientational fluctuations, and an increased rate of translational diffusion, to all of which the Janus character of LipA contributes, are the factors responsible for this enhancement. This study can spur further investigations of the Janus behavior of enzymes to enhance their activity as well as to stabilize the biphasic emulsion needed for interfacial catalysis.
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Affiliation(s)
- Sudip Das
- Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India
| | - Sudarshan Behera
- Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India
| | - Sundaram Balasubramanian
- Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India
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16
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Araújo SCDS, Silva-Portela RCB, de Lima DC, da Fonsêca MMB, Araújo WJ, da Silva UB, Napp AP, Pereira E, Vainstein MH, Agnez-Lima LF. MBSP1: a biosurfactant protein derived from a metagenomic library with activity in oil degradation. Sci Rep 2020; 10:1340. [PMID: 31992807 PMCID: PMC6987170 DOI: 10.1038/s41598-020-58330-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 12/04/2019] [Indexed: 11/21/2022] Open
Abstract
Microorganisms represent the most abundant biomass on the planet; however, because of several cultivation technique limitations, most of this genetic patrimony has been inaccessible. Due to the advent of metagenomic methodologies, such limitations have been overcome. Prevailing over these limitations enabled the genetic pool of non-cultivable microorganisms to be exploited for improvements in the development of biotechnological products. By utilising a metagenomic approach, we identified a new gene related to biosurfactant production and hydrocarbon degradation. Environmental DNA was extracted from soil samples collected on the banks of the Jundiaí River (Natal, Brazil), and a metagenomic library was constructed. Functional screening identified the clone 3C6, which was positive for the biosurfactant protein and revealed an open reading frame (ORF) with high similarity to sequences encoding a hypothetical protein from species of the family Halobacteriaceae. This protein was purified and exhibited biosurfactant activity. Due to these properties, this protein was named metagenomic biosurfactant protein 1 (MBSP1). In addition, E. coli RosettaTM (DE3) strain cells transformed with the MBSP1 clone showed an increase in aliphatic hydrocarbon degradation. In this study, we described a single gene encoding a protein with marked tensoactive properties that can be produced in a host cell, such as Escherichia coli, without substrate dependence. Furthermore, MBSP1 has been demonstrated as the first protein with these characteristics described in the Archaea or Bacteria domains.
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Affiliation(s)
- Sinara Carla da Silva Araújo
- Department of Cellular Biology and Genetics, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Rita C B Silva-Portela
- Department of Cellular Biology and Genetics, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Daniel Chaves de Lima
- Department of Cellular Biology and Genetics, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | | | - Wydemberg J Araújo
- Department of Cellular Biology and Genetics, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Uaska Bezerra da Silva
- Department of Cellular Biology and Genetics, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Amanda P Napp
- Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Evandro Pereira
- Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Marilene H Vainstein
- Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Lucymara Fassarella Agnez-Lima
- Department of Cellular Biology and Genetics, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil.
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17
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Saika A, Fukuoka T, Mikome S, Kondo Y, Habe H, Morita T. Screening and isolation of the liamocin-producing yeast Aureobasidium melanogenum using xylose as the sole carbon source. J Biosci Bioeng 2019; 129:428-434. [PMID: 31732259 DOI: 10.1016/j.jbiosc.2019.10.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 10/02/2019] [Accepted: 10/17/2019] [Indexed: 12/12/2022]
Abstract
Xylose, the main component of xylan, is the second most abundant sugar in nature after glucose. Consequently, xylose represents an attractive feedstock for the production of value-added compounds such as biosurfactants (BSs), which are produced by various bacteria and yeasts. In this study, we screened and isolated yeast strains that synthesize BSs using xylose as the sole carbon source. We applied matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) to screen for BS-producing yeasts and isolated eight strains as the liamocin producers. Two of the eight strains, AS37 and SK25, were identified as Aureobasidium melanogenum, which is known as black yeasts, by based on 26S ribosomal RNA gene sequences. Both strains produced a wide variety of liamocin structures from not only xylose but also glucose and sucrose. According to the MALDI-TOF MS analysis, signals corresponding to sodium ion adducts of di-, tri-, tetra-, penta- and hexa-acylated C6-liamocins and di-, tri- and tetra-acylated C5-liamocins were detected. In addition, their mono-acetylated form was also detected. The dominant sugar component of liamocins produced by strains AS37 and SK25 is mannitol as estimated by HPLC analysis. This is the first report to describe the screening of liamocins-producing yeasts using xylose as the sole carbon source.
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Affiliation(s)
- Azusa Saika
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5-2, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Tokuma Fukuoka
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5-2, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Shuntaro Mikome
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - Yukishige Kondo
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - Hiroshi Habe
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
| | - Tomotake Morita
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5-2, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
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18
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Zakharenko AS, Galachyants YP, Morozov IV, Shubenkova OV, Morozov AA, Ivanov VG, Pimenov NV, Krasnopeev AY, Zemskaya TI. Bacterial Communities in Areas of Oil and Methane Seeps in Pelagic of Lake Baikal. Microb Ecol 2019; 78:269-285. [PMID: 30483839 DOI: 10.1007/s00248-018-1299-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 11/20/2018] [Indexed: 06/09/2023]
Abstract
We have assessed the diversity of bacteria near oil-methane (area I) and methane (area II) seeps in the pelagic zone of Lake Baikal using massive parallel sequencing of 16S rRNA, pmoA, and mxaF gene fragments amplified from total DNA. At depths from the surface to 100 m, sequences belonging to Cyanobacteria dominated. In the communities to a depth of 200 m of the studied areas, Proteobacteria dominated the deeper layers of the water column. Alphaproteobacteria sequences were predominant in the community near the oil-methane seep, while the community near the methane seep was characterized by the prevalence of Alpha- and Gammaproteobacteria. Among representatives of these classes, type I methanotrophs prevailed in the 16S rRNA gene libraries from the near-bottom area, and type II methanotrophs were detected in minor quantities at different depths. In the analysis of the libraries of the pmoA and mxaF functional genes, we observed the different taxonomic composition of methanotrophic bacteria in the surface and deep layers of the water column. All pmoA sequences from area I were type II methanotrophs and were detected at a depth of 300 m, while sequences of type I methanotrophs were the most abundant in deep layers of the water column of area II. All mxaF gene sequences belonged to Methylobacterium representatives. Based on comparative analyses of 16S rRNA, pmoA, and mxaF gene fragment libraries, we suggest that there must be a wider spectrum of functional genes facilitating methane oxidation that were not detected with the primers used.
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Affiliation(s)
- Aleksandra S Zakharenko
- Siberian Branch of the Russian Academy of Sciences, Limnological Institute, Ulan-Batorskaya Street 3, 664033, Irkutsk, Russia.
| | - Yuriy P Galachyants
- Siberian Branch of the Russian Academy of Sciences, Limnological Institute, Ulan-Batorskaya Street 3, 664033, Irkutsk, Russia
| | - Igor V Morozov
- Siberian Branch of the Russian Academy of Sciences, Institute of Chemical Biology and Fundamental Medicine, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - Olga V Shubenkova
- Siberian Branch of the Russian Academy of Sciences, Limnological Institute, Ulan-Batorskaya Street 3, 664033, Irkutsk, Russia
| | - Alexey A Morozov
- Siberian Branch of the Russian Academy of Sciences, Limnological Institute, Ulan-Batorskaya Street 3, 664033, Irkutsk, Russia
| | - Vyacheslav G Ivanov
- Siberian Branch of the Russian Academy of Sciences, Limnological Institute, Ulan-Batorskaya Street 3, 664033, Irkutsk, Russia
| | - Nikolay V Pimenov
- Research Center of Biotechnology, Russian Academy of Sciences, Winogradsky Institute of Microbiology, Moscow, Russia
| | - Andrey Y Krasnopeev
- Siberian Branch of the Russian Academy of Sciences, Limnological Institute, Ulan-Batorskaya Street 3, 664033, Irkutsk, Russia
| | - Tamara I Zemskaya
- Siberian Branch of the Russian Academy of Sciences, Limnological Institute, Ulan-Batorskaya Street 3, 664033, Irkutsk, Russia
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19
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Stamenkovic A, Ganguly R, Aliani M, Ravandi A, Pierce GN. Overcoming the Bitter Taste of Oils Enriched in Fatty Acids to Obtain Their Effects on the Heart in Health and Disease. Nutrients 2019; 11:E1179. [PMID: 31137794 PMCID: PMC6566568 DOI: 10.3390/nu11051179] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/13/2019] [Accepted: 05/22/2019] [Indexed: 01/18/2023] Open
Abstract
Fatty acids come in a variety of structures and, because of this, create a variety of functions for these lipids. Some fatty acids have a role to play in energy metabolism, some help in lipid storage, cell structure, the physical state of the lipid, and even in food stability. Fatty acid metabolism plays a particularly important role in meeting the energy demands of the heart. It is the primary source of myocardial energy in control conditions. Its role changes dramatically in disease states in the heart, but the pathologic role these fatty acids play depends upon the type of cardiovascular disease and the type of fatty acid. However, no matter how good a food is for one's health, its taste will ultimately become a deciding factor in its influence on human health. No food will provide health benefits if it is not ingested. This review discusses the taste characteristics of culinary oils that contain fatty acids and how these fatty acids affect the performance of the heart during healthy and diseased conditions. The contrasting contributions that different fatty acid molecules have in either promoting cardiac pathologies or protecting the heart from cardiovascular disease is also highlighted in this article.
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Affiliation(s)
- Aleksandra Stamenkovic
- Institute of Cardiovascular Sciences, St Boniface Hospital, Winnipeg, MB R2H2A6, Canada.
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E0W3, Canada.
| | - Riya Ganguly
- Institute of Cardiovascular Sciences, St Boniface Hospital, Winnipeg, MB R2H2A6, Canada.
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E0W3, Canada.
| | - Michel Aliani
- Canadian Centre for Agri-Food Research in Health and Medicine (CCARM), Albrechtsen Research Centre, St Boniface Hospital, University of Manitoba, Winnipeg, MB R2H2A6, Canada.
- Department of Human Nutritional Sciences, Faculty of Agricultural and Food Sciences, University of Manitoba, Winnipeg, MB R2H2A6, Canada.
| | - Amir Ravandi
- Institute of Cardiovascular Sciences, St Boniface Hospital, Winnipeg, MB R2H2A6, Canada.
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E0W3, Canada.
- Internal Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E0W3, Canada.
| | - Grant N Pierce
- Institute of Cardiovascular Sciences, St Boniface Hospital, Winnipeg, MB R2H2A6, Canada.
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E0W3, Canada.
- Canadian Centre for Agri-Food Research in Health and Medicine (CCARM), Albrechtsen Research Centre, St Boniface Hospital, University of Manitoba, Winnipeg, MB R2H2A6, Canada.
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20
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Zhou X, Zhang Y, Shen Y, Zhang X, Xu S, Shang Z, Xia M, Wang M. Efficient production of androstenedione by repeated batch fermentation in waste cooking oil media through regulating NAD +/NADH ratio and strengthening cell vitality of Mycobacterium neoaurum. Bioresour Technol 2019; 279:209-217. [PMID: 30735930 DOI: 10.1016/j.biortech.2019.01.144] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 01/29/2019] [Accepted: 01/30/2019] [Indexed: 06/09/2023]
Abstract
The bioprocess for producing androstenedione (AD) from phytosterols by using Mycobacterium neoaurum is hindered by nicotinamide adenine dinucleotides (NAD+ and NADH) ratio imbalance, insoluble substrate, and lengthy biotransformation period. This study aims to improve the efficiency of AD production through a combined application of cofactor, solvent, and fermentation engineering technologies. Through the enhanced type II NADH dehydrogenase (NDH-II), the NAD+/NADH ratio and ATP levels increased; the release of reactive oxygen species decreased by 42.32%, and the cell viability improved by 54.17%. In surfactant-waste cooking oil-water media, the conversion of phytosterol increased from 23.92% to 94.98%. Repeated batch culture successfully reduced the biotransformation period from 30 to 17 days, the productivity was 13.75 times more than the parent strain. This study is the first to improve the productivity of AD by enhancing NDH-II and provides a new strategy to increase the accumulation of NAD+-dependent metabolites during biotransformation.
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Affiliation(s)
- Xiuling Zhou
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Yang Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China; College of Life Science, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Yanbing Shen
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China; Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin 300457, China.
| | - Xiao Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Shuangping Xu
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Zhihua Shang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Menglei Xia
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Min Wang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China; Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin 300457, China.
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21
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Patel A, Matsakas L. A comparative study on de novo and ex novo lipid fermentation by oleaginous yeast using glucose and sonicated waste cooking oil. Ultrason Sonochem 2019; 52:364-374. [PMID: 30559080 DOI: 10.1016/j.ultsonch.2018.12.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 12/04/2018] [Accepted: 12/07/2018] [Indexed: 05/23/2023]
Abstract
There are only a few reports available about the assimilation of hydrophobic substrates by microorganisms, however, it is well known that oleaginous microorganisms are capable of utilizing both hydrophilic and hydrophobic substrates and accumulate lipids via two different pathways namely de novo and ex novo lipid synthesis, respectively. In the present study, an oleaginous yeast, Cryptococcus curvatus, was investigated for its potentials to utilize a waste substrate of hydrophobic nature (waste cooking oil - WCO) and compared with its ability to utilize a hydrophilic carbon source (glucose). To facilitate the utilization of WCO by C. curvatus, the broth was sonicated to form a stable oil-in-water emulsion without adding any emulsifier, which was then compared with WCO samples without any ultrasound treatment (unsonicated) for the yeast cultivation. Ultrasonication reduces the size of hydrophobic substrates and improves their miscibility in an aqueous broth making them easily assimilated by oleaginous yeast. Under de novo lipid fermentation, the yeast synthesized 9.93 ± 0.84 g/L of cell dry weight and 5.23 ± 0.49 g/L lipids (lipid content of 52.66 ± 0.93% w/w) when cultivated on 40 g/L of glucose (C/N ratio of 40). The amount of cell dry weight, lipid concentration, and lipid content were considerably higher during the ex novo lipid synthesis. More specifically, the highest lipid content achieved was 70.13 ± 1.65% w/w with a corresponding dry cell weight and lipid concentration of 18.62 ± 0.76 g/L and 13.06 ± 0.92 g/L respectively, when grown on 20 g/L sonicated WCO. The highest lipid concentration, however, was observed when the yeast was cultivated on 40 g/L sonicated WCO. Under these conditions, 20.34 g/L lipids were produced with a lipid content of 57.05% w/w. On the other hand, lipid production with unsonicated WCO was significant lower, reaching 11.16 ± 1.02 g/L (69.14 ± 1.34% w/w of lipid content) and 12.21 ± 1.34 g/L (47.39 ± 1.67% w/w of lipid content) for 20 g/L and 40 g/L of WCO, respectively. This underpins the significance of the sonication treatment, especially at elevated WCO concentrations, to improve the accessibility of the yeast to the WCO. Sonication treatment that was used in this study assisted the utilization of WCO without the need to add emulsifiers, thus reducing the need for chemicals and in turn has a positive impact on the production costs. The microbial lipids produced presented a different fatty acid composition compared to the WCO, making them more suitable for biodiesel production as suggested by the theoretical estimation of the biodiesel properties.
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Affiliation(s)
- Alok Patel
- Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental, and Natural Resources Engineering, Luleå University of Technology, SE-971 87 Luleå, Sweden
| | - Leonidas Matsakas
- Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental, and Natural Resources Engineering, Luleå University of Technology, SE-971 87 Luleå, Sweden.
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Uma V, Gandhimathi R. Organic removal and synthesis of biopolymer from synthetic oily bilge water using the novel mixed bacterial consortium. Bioresour Technol 2019; 273:169-176. [PMID: 30445269 DOI: 10.1016/j.biortech.2018.11.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 10/31/2018] [Accepted: 11/01/2018] [Indexed: 06/09/2023]
Abstract
Synthetic oily bilge water (OBW) treatment and subsequent production of biopolymer were studied by using a sequential batch reactor (SBR). The effect of various influencing parameters such as solids retention time (SRT), cycle time (CT), substrate concentration, pH level on the organic removal and synthesis of polyhydroxyalkanoates (PHA) was examined by novel soil bacteria isolated from hydrocarbon contaminated site near Karaikal port, India. The isolates were identified as Pseudomonas tuomuerensis and Pseudomonas nitroreducens using 16S rRNA. Sudan Black B staining was performed to visualize the presence of PHA. The experimental results showed that a decrease in substrate concentration to 5000 mg/L of soluble COD (CODs) showed maximum organic removal (81%) and maximum PHA yields of its cell dry mass (81%). The PHA yield was maximum at SRT of 5 d, pH = 7 and CT of 24 h. The produced PHA was characterized by using FTIR, XRD and SEM analysis.
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Affiliation(s)
- V Uma
- Department of Civil Engineering, National Institute of Technology, Tiruchirappalli, Tamilnadu 620 015, India
| | - R Gandhimathi
- Department of Civil Engineering, National Institute of Technology, Tiruchirappalli, Tamilnadu 620 015, India.
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23
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Zuccaro G, Steyer JP, van Lis R. The algal trophic mode affects the interaction and oil production of a synergistic microalga-yeast consortium. Bioresour Technol 2019; 273:608-617. [PMID: 30481660 DOI: 10.1016/j.biortech.2018.11.063] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/16/2018] [Accepted: 11/17/2018] [Indexed: 05/27/2023]
Abstract
The use of non-food feedstocks to produce renewable microbial resources can limit our dependence on fossil fuels and lower CO2 emissions. Since microalgae display a virtuous CO2 and O2 exchange with heterotrophs, the microalga Chlamydomonas reinhardtii was combined with the oleaginous yeast Lipomyces starkeyi, known for their production of oil, base material for biodiesel. The coupled growth was shown to be synergistic for biomass and lipid production. The species were truly symbiotic since synergistic growth occurred even when the alga cannot use the organic carbon in the feedstock and in absence of air, thus depending entirely on CO2-O2 exchange. Since addition of acetate as the algal carbon source lowered the performance of the consortium, the microbial system design should take into account algal mixotrophy. The mixed biomass was found be suitable for biodiesel production, and whereas lipid production increased in the consortium, yields should be improved in future studies.
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Affiliation(s)
- G Zuccaro
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, 80125 Napoli, Italy; LBE, INRA, Univ Montpellier, 102 avenue des Etangs, F-11100 Narbonne, France
| | - J-P Steyer
- LBE, INRA, Univ Montpellier, 102 avenue des Etangs, F-11100 Narbonne, France
| | - R van Lis
- LBE, INRA, Univ Montpellier, 102 avenue des Etangs, F-11100 Narbonne, France.
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24
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Kumar LR, Yellapu SK, Zhang X, Tyagi RD. Energy balance for biodiesel production processes using microbial oil and scum. Bioresour Technol 2019; 272:379-388. [PMID: 30384213 DOI: 10.1016/j.biortech.2018.10.071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 10/25/2018] [Accepted: 10/26/2018] [Indexed: 06/08/2023]
Abstract
Biodiesel production using microbial oil is a promising technology. The main aim of this study is to check practical feasibility (in terms of energy balance) of different biodiesel production processes. Mass and energy balance of biodiesel production have been performed for 3 separate processes: (1) microbial lipid production from T. oleaginosus using waste substrates followed by INRS downstream process (2) microbial lipid production from pure substrate using R. toruloides followed by traditional and INRS downstream process and 3) oil extraction from scum and conversion to biodiesel. It was found that employing waste substrates like crude glycerol and municipal sludge in fermentation reduced the energy input by 50%. While employing biodegradable surfactants and petroleum-diesel as solvent (PD) for lipid extraction and recovery significantly reduced the energy input at cell wall disruption step. Biodiesel production from scum is a two-step process which is fast and energetically favorable.
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Affiliation(s)
- Lalit R Kumar
- INRS Eau, Terre et Environnement, 490, rue de la Couronne, Québec G1K 9A9, Canada
| | - Sravan Kumar Yellapu
- INRS Eau, Terre et Environnement, 490, rue de la Couronne, Québec G1K 9A9, Canada
| | - Xiaolei Zhang
- School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, Guangdong 518055, China
| | - R D Tyagi
- INRS Eau, Terre et Environnement, 490, rue de la Couronne, Québec G1K 9A9, Canada.
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25
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Kurade MB, Saha S, Salama ES, Patil SM, Govindwar SP, Jeon BH. Acetoclastic methanogenesis led by Methanosarcina in anaerobic co-digestion of fats, oil and grease for enhanced production of methane. Bioresour Technol 2019; 272:351-359. [PMID: 30384210 DOI: 10.1016/j.biortech.2018.10.047] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/17/2018] [Accepted: 10/19/2018] [Indexed: 05/23/2023]
Abstract
Fats, oil and grease (FOG) are energy-dense wastes that substantially increase biomethane recovery. Shifts in the microbial community during anaerobic co-digestion of FOG was assessed to understand relationships between substrate digestion and microbial adaptations. Excessive addition of FOG inhibited the methanogenic activity during initial phase; however, it enhanced the ultimate methane production by 217% compared to the control. The dominance of Proteobacteria was decreased with a simultaneous increase in Firmicutes, Bacteriodetes, Synergistetes and Euryarchaeota during the co-digestion. A significant increase in Syntrophomonas (0.18-11%), Sporanaerobacter (0.14-6%) and Propionispira (0.02-19%) was observed during co-digestion, which substantiated their importance in acetogenesis. Among methanogenic Archaea, the dominance of Methanosaeta (94%) at the beginning of co-digestion was gradually replaced by Methanosarcina (0.52-95%). The absence/relatively low abundance of syntrophic acetate oxidizers and hydrogenotrophic methanogens, and dominance of acetoclastic methanogens suggested that methane generation during co-digestion of FOG was predominantly conducted through acetoclastic pathway led by Methanosarcina.
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Affiliation(s)
- Mayur B Kurade
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Shouvik Saha
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - El-Sayed Salama
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea; Department of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou 730000, Gansu Province, PR China
| | - Swapnil M Patil
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Sanjay P Govindwar
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Byong-Hun Jeon
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea.
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26
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Jayanthi S, Thalla AK. Producing Oleaginous Organisms Using Food Waste: Challenges and Outcomes. Methods Mol Biol 2019; 1995:369-381. [PMID: 31148139 DOI: 10.1007/978-1-4939-9484-7_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
With organic or food waste being one of the main constituents of the total urban waste generated, it not only makes it essential to seek means for its safe disposal but at the same time reiterates the huge potential that lies with the proper utilization of such a widely available resource. Oleaginous microbes that are effective in producing or storing oil would use food waste rich in carbohydrates, lipids, and proteins, and this oil in turn could be an alternative feedstock for the production of biofuels. However, there are few challenges in the process. The various challenges in this process and methods to address them are discussed in the present chapter.
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Affiliation(s)
| | - Arun Kumar Thalla
- Department of Civil Engineering, National Institute of Technology Karnataka, Mangalore, Karnataka, India.
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27
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Datta P, Tiwari P, Pandey LM. Isolation and characterization of biosurfactant producing and oil degrading Bacillus subtilis MG495086 from formation water of Assam oil reservoir and its suitability for enhanced oil recovery. Bioresour Technol 2018; 270:439-448. [PMID: 30245313 DOI: 10.1016/j.biortech.2018.09.047] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 09/07/2018] [Accepted: 09/08/2018] [Indexed: 06/08/2023]
Abstract
The strains isolated from the formation water were characterized and screened considering their crude oil degradation capability and biosurfactant production ability. The growth kinetics study of isolated Bacillus subtilis MG495086 was carried out by varying growth parameters i.e. carbon source, temperature, pH and salinity. The biosurfactant production was optimized adopting RSM-CCD considering carbon source (1-5%), pH (3-11) and temperature (25-65 °C) as matrix parameters. The optimum biosurfactant production (6.3 ± 0.1 g/L) and the minimum surface tension 29.85 mN/m were obtained after 96 h of incubation under optimal conditions i.e. 3.8% (v/v) of light-paraffin oil as sole carbon source at 62.4 °C and pH 7.7 with the maximum oil degradation capability of 91.3 ± 5%. Critical micelle concentration value of crude biosurfactant was found to be 40 mg/L with high emulsification activity of 72.45 ± 0.85%. The produced biosurfactant was identified as lipopeptide (Surfactin) and characterized using various analytical techniques to establish its suitability for microbial enhanced oil recovery.
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Affiliation(s)
- Poulami Datta
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Pankaj Tiwari
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India; Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| | - Lalit M Pandey
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India; Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
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28
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Xiao Y, Chen C, Wang B, Mao Z, Xu H, Zhong Y, Zhang L, Sui X, Qu S. In Vitro Digestion of Oil-in-Water Emulsions Stabilized by Regenerated Chitin. J Agric Food Chem 2018; 66:12344-12352. [PMID: 30372059 DOI: 10.1021/acs.jafc.8b03873] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Regenerated chitin (R-chitin) can stabilize oil-in-water (O/W) emulsions containing up to 50% oil at a low chitin dosage of 2 mg/g oil. The mean droplet size of the resulting emulsion decreased as more R-chitin was used. Confocal laser scanning microscopy (CLSM) demonstrated the adsorption of R-chitin on emulsion droplets surface, confirming the emulsions were stabilized via Pickering mechanism. The effects of R-chitin concentration on storage stability, microstructure, and lipid digestion properties were investigated. Pickering emulsions stabilized by R-chitin above 1.0% w/w exhibited outstanding physical stability against coalescence and Ostwald ripening. In particular, highly consistent emulsions that remained almost unchanged during oral, gastric, and intestine digestion could be prepared using R-chitin. The emulsions could enhance fullness and satiety perceptions at gastric level, and R-chitin could be used as a substitute for food emulsifiers for weight management via increasing satiation perception and reducing lipid digestion.
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Affiliation(s)
- Yongmei Xiao
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
| | - Chen Chen
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
| | - Bijia Wang
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
- Key Lab of High Performance Fibers & Products, Ministry of Education , Donghua University , Shanghai 201620 , People's Republic of China
| | - Zhiping Mao
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
| | - Hong Xu
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
| | - Yi Zhong
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
| | - Linping Zhang
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
| | - Xiaofeng Sui
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology , Donghua University , Shanghai 201620 , People's Republic of China
- Key Lab of High Performance Fibers & Products, Ministry of Education , Donghua University , Shanghai 201620 , People's Republic of China
| | - Shen Qu
- Department of Endocrinology & Metabolism, Shanghai Tenth People's Hospital, School of Medicine , Tongji University , Shanghai 200092 , China
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29
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Hollande L, Domenek S, Allais F. Chemo-Enzymatic Synthesis of Renewable Sterically-Hindered Phenolic Antioxidants with Tunable Polarity from Lignocellulose and Vegetal Oil Components. Int J Mol Sci 2018; 19:ijms19113358. [PMID: 30373201 PMCID: PMC6274793 DOI: 10.3390/ijms19113358] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 10/23/2018] [Accepted: 10/24/2018] [Indexed: 11/16/2022] Open
Abstract
Despite their great antioxidant activities, the use of natural phenols as antioxidant additives for polyolefins is limited owing to their weak thermal stability and hydrophilic character. Herein, we report a sustainable chemo-enzymatic synthesis of renewable lipophilic antioxidants specifically designed to overcome these restrictions using naturally occurring ferulic acid (found in lignocellulose) and vegetal oils (i.e., lauric, palmitic, stearic acids, and glycerol) as starting materials. A predictive Hansen and Hildebrand parameters-based approach was used to tailor the polarity of newly designed structures. A specific affinity of Candida antarctica lipase B (CAL-B) towards glycerol was demonstrated and exploited to efficiently synthesized the target compounds in yields ranging from 81 to 87%. Antiradical activity as well as radical scavenging behavior (H atom-donation, kinetics) of these new fully biobased additives were found superior to that of well-established, commercially available fossil-based antioxidants such as Irganox 1010® and Irganox 1076®. Finally, their greater thermal stabilities (302 < Td5% < 311 °C), established using thermal gravimetric analysis, combined with their high solubilities and antioxidant activities, make these novel sustainable phenolics a very attractive alternative to current fossil-based antioxidant additives in polyolefins.
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Affiliation(s)
- Louis Hollande
- Chaire ABI, AgroParisTech, CEBB 3 rue des Rouges Terres 51110 Pomacle, France.
- UMR GENIAL, AgroParisTech, INRA, Université Paris-Saclay, Avenue des Olympiades, 91300 Massy, France.
| | - Sandra Domenek
- UMR GENIAL, AgroParisTech, INRA, Université Paris-Saclay, Avenue des Olympiades, 91300 Massy, France.
| | - Florent Allais
- Chaire ABI, AgroParisTech, CEBB 3 rue des Rouges Terres 51110 Pomacle, France.
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30
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Voskoboinikov GM, Matishov GG, Metelkova LO, Zhakovskaya ZA, Lopushanskaya EM. Participation of the Green Algae Ulvaria obscura in Bioremediation of Sea Water from Oil Products. Dokl Biol Sci 2018; 481:139-141. [PMID: 30171466 DOI: 10.1134/s0012496618040026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Indexed: 11/23/2022]
Abstract
Participation of green algae in bioremediation of sea water from oil products (OPs) has been studied. Decrease in the content of OPs in water is accompanied by their accumulation by the alga Ulvaria obscura (Chlorophyta). It has been assumed that neutralization of OPs in Ulvaria occurs, similarly to Fucus vesiculosus (Phaeophyta), all over the thallome: destruction of OPs starts on the alga surface by epiphytic hydrocarbonoxidizing bacteria providing absorption and subsequent degradation of OPs by plant cells. The role of macrophytes in bioremediation of coastal areas from OPs is considerably higher than previously supposed.
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Affiliation(s)
- G M Voskoboinikov
- Murmansk Marine Biological Institute, Kola Research Center, Russian Academy of Sciences, Murmansk, 183019, Russia.
| | - G G Matishov
- Murmansk Marine Biological Institute, Kola Research Center, Russian Academy of Sciences, Murmansk, 183019, Russia
| | - L O Metelkova
- St. Petersburg, Research Center of Ecological Safety, Russian Academy of Sciences, St. Petersburg, Russia
| | - Z A Zhakovskaya
- St. Petersburg, Research Center of Ecological Safety, Russian Academy of Sciences, St. Petersburg, Russia
| | - E M Lopushanskaya
- Russian Federal Research Institute of Metrology, St. Petersburg, Russia
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31
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Lastel ML, Fournier A, Jurjanz S, Thomé JP, Joaquim-Justo C, Archimède H, Mahieu M, Feidt C, Rychen G. Comparison of chlordecone and NDL-PCB decontamination dynamics in growing male kids after cessation of oral exposure: Is there a potential to decrease the body levels of these pollutants by dietary supplementation of activated carbon or paraffin oil? Chemosphere 2018; 193:100-107. [PMID: 29127834 DOI: 10.1016/j.chemosphere.2017.10.120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 09/23/2017] [Accepted: 10/23/2017] [Indexed: 06/07/2023]
Abstract
Sixteen weaned male Alpine kids (Capra hircus) were subjected to a 21-day oral daily exposure of 0.05 mg kg-1 BW. d-1 of chlordecone (CLD) and 0.30 μg kg-1 BW. d-1 of each non-dioxin-like polychlorinated biphenyls (NDL-PCBs, congeners 28, 52, 101, 138, 153 and 180). Four kids, identified as the CONTA group, were slaughtered at the end of the exposure, while the remaining animals (n = 12) were fed with specific diets for an additional 21-day decontamination period before slaughtering. Kids from the DECONTA (n = 4) group were fed a control diet, while those from the AC10% and PO8% group received pellets supplemented with 10% activated carbon (AC) and 8% paraffin oil (PO), respectively. CLD and NDL-PCB levels in blood, liver, peri-renal fat and muscles from different groups were analysed to compare the decontamination dynamics of the pollutants and to determine the efficiency of AC and PO to decrease the body levels of pollutants. After the decontamination period, the CLD levels considerably decreased (more than 60%) in blood, liver, muscles and fat. Concerning NDL-PCBs, the decontamination process was much lower. Overall, CLD appeared to be less retained in kids' organism compared with NDL-PCBs, and the decontamination dynamics of these pollutants appeared to be different because of their specific physicochemical properties and lipophilicity. Furthermore, the dietary supplementation with AC or PO did not significantly affect the decontamination dynamics.
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Affiliation(s)
- Marie-Laure Lastel
- Université de Lorraine, INRA, USC 340, UR AFPA, EA 3998, 2 Avenue de la Forêt de Haye, TSA 40402, F-54518 Vandœuvre-lès-Nancy Cedex, France; French Environment and Energy Management Agency, 20, Avenue du Grésillé, BP 90406, 49004 Angers Cedex 01, France.
| | - Agnès Fournier
- Université de Lorraine, INRA, USC 340, UR AFPA, EA 3998, 2 Avenue de la Forêt de Haye, TSA 40402, F-54518 Vandœuvre-lès-Nancy Cedex, France
| | - Stefan Jurjanz
- Université de Lorraine, INRA, USC 340, UR AFPA, EA 3998, 2 Avenue de la Forêt de Haye, TSA 40402, F-54518 Vandœuvre-lès-Nancy Cedex, France
| | - Jean-Pierre Thomé
- Université de Liège, LEAE-CART (Laboratoire d'Ecologie Animale et d'Ecotoxicologie-Centre for Analytical Research and Technology), Allée du 6 Août, 11, 4000 Sart-Tilman, Liège, Belgium
| | - Célia Joaquim-Justo
- Université de Liège, LEAE-CART (Laboratoire d'Ecologie Animale et d'Ecotoxicologie-Centre for Analytical Research and Technology), Allée du 6 Août, 11, 4000 Sart-Tilman, Liège, Belgium
| | - Harry Archimède
- INRA, URZ, UR 143, Domaine Duclos, F-97170 Petit-Bourg, Guadeloupe, France
| | - Maurice Mahieu
- INRA, URZ, UR 143, Domaine Duclos, F-97170 Petit-Bourg, Guadeloupe, France
| | - Cyril Feidt
- Université de Lorraine, INRA, USC 340, UR AFPA, EA 3998, 2 Avenue de la Forêt de Haye, TSA 40402, F-54518 Vandœuvre-lès-Nancy Cedex, France
| | - Guido Rychen
- Université de Lorraine, INRA, USC 340, UR AFPA, EA 3998, 2 Avenue de la Forêt de Haye, TSA 40402, F-54518 Vandœuvre-lès-Nancy Cedex, France
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32
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Unver T, Wu Z, Sterck L, Turktas M, Lohaus R, Li Z, Yang M, He L, Deng T, Escalante FJ, Llorens C, Roig FJ, Parmaksiz I, Dundar E, Xie F, Zhang B, Ipek A, Uranbey S, Erayman M, Ilhan E, Badad O, Ghazal H, Lightfoot DA, Kasarla P, Colantonio V, Tombuloglu H, Hernandez P, Mete N, Cetin O, Van Montagu M, Yang H, Gao Q, Dorado G, Van de Peer Y. Genome of wild olive and the evolution of oil biosynthesis. Proc Natl Acad Sci U S A 2017; 114:E9413-E9422. [PMID: 29078332 PMCID: PMC5676908 DOI: 10.1073/pnas.1708621114] [Citation(s) in RCA: 152] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Here we present the genome sequence and annotation of the wild olive tree (Olea europaea var. sylvestris), called oleaster, which is considered an ancestor of cultivated olive trees. More than 50,000 protein-coding genes were predicted, a majority of which could be anchored to 23 pseudochromosomes obtained through a newly constructed genetic map. The oleaster genome contains signatures of two Oleaceae lineage-specific paleopolyploidy events, dated at ∼28 and ∼59 Mya. These events contributed to the expansion and neofunctionalization of genes and gene families that play important roles in oil biosynthesis. The functional divergence of oil biosynthesis pathway genes, such as FAD2, SACPD, EAR, and ACPTE, following duplication, has been responsible for the differential accumulation of oleic and linoleic acids produced in olive compared with sesame, a closely related oil crop. Duplicated oleaster FAD2 genes are regulated by an siRNA derived from a transposable element-rich region, leading to suppressed levels of FAD2 gene expression. Additionally, neofunctionalization of members of the SACPD gene family has led to increased expression of SACPD2, 3, 5, and 7, consequently resulting in an increased desaturation of steric acid. Taken together, decreased FAD2 expression and increased SACPD expression likely explain the accumulation of exceptionally high levels of oleic acid in olive. The oleaster genome thus provides important insights into the evolution of oil biosynthesis and will be a valuable resource for oil crop genomics.
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Affiliation(s)
- Turgay Unver
- İzmir International Biomedicine and Genome Institute, Dokuz Eylül University, 35340 İzmir, Turkey;
| | | | - Lieven Sterck
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
| | - Mine Turktas
- Department of Biology, Faculty of Science, Cankiri Karatekin University, 18100 Cankiri, Turkey
| | - Rolf Lohaus
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
| | - Zhen Li
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
| | - Ming Yang
- BGI Shenzhen, 518038 Shenzhen, China
| | - Lijuan He
- BGI Shenzhen, 518038 Shenzhen, China
| | | | | | | | | | - Iskender Parmaksiz
- Department of Molecular Biology and Genetics, Faculty of Science, Gaziosmanpasa University, 60250 Tokat, Turkey
| | - Ekrem Dundar
- Department of Molecular Biology and Genetics, Faculty of Science, Balikesir University, 10145 Balikesir, Turkey
| | - Fuliang Xie
- Department of Biology, East Carolina University, Greenville, NC 27858
| | - Baohong Zhang
- Department of Biology, East Carolina University, Greenville, NC 27858
| | - Arif Ipek
- Department of Biology, Faculty of Science, Cankiri Karatekin University, 18100 Cankiri, Turkey
| | - Serkan Uranbey
- Department of Field Crops, Faculty of Agriculture, Ankara University, 06120 Ankara, Turkey
| | - Mustafa Erayman
- Department of Biology, Faculty of Arts and Science, Mustafa Kemal University, 31060 Hatay, Turkey
| | - Emre Ilhan
- Department of Biology, Faculty of Arts and Science, Mustafa Kemal University, 31060 Hatay, Turkey
| | - Oussama Badad
- Laboratory of Plant Physiology, University Mohamed V, 10102 Rabat, Morocco
| | - Hassan Ghazal
- Polydisciplinary Faculty of Nador, University Mohamed Premier, 62700 Nador, Morocco
| | - David A Lightfoot
- Department of Plant, Soil and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901
| | - Pavan Kasarla
- Department of Plant, Soil and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901
| | - Vincent Colantonio
- Department of Plant, Soil and Agricultural Systems, Southern Illinois University, Carbondale, IL 62901
| | - Huseyin Tombuloglu
- Institute for Research and Medical Consultation, University of Dammam, 34212 Dammam, Saudi Arabia
| | - Pilar Hernandez
- Instituto de Agricultura Sostenible, Consejo Superior de Investigaciones Científicas, 14004 Córdoba, Spain
| | - Nurengin Mete
- Olive Research Institute of Bornova, 35100 Izmir, Turkey
| | - Oznur Cetin
- Olive Research Institute of Bornova, 35100 Izmir, Turkey
| | - Marc Van Montagu
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium;
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
| | | | - Qiang Gao
- BGI Shenzhen, 518038 Shenzhen, China
| | - Gabriel Dorado
- Departamento Bioquímica y Biología Molecular, Campus de Excelencia Internacional Agroalimentario, Universidad de Córdoba, 14071 Córdoba, Spain
| | - Yves Van de Peer
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium;
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
- Department of Genetics, Genomics Research Institute, University of Pretoria, Pretoria 0028, South Africa
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Whittaker DJ, Rosvall KA, Slowinski SP, Soini HA, Novotny MV, Ketterson ED. Songbird chemical signals reflect uropygial gland androgen sensitivity and predict aggression: implications for the role of the periphery in chemosignaling. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2017; 204:5-15. [PMID: 29063285 DOI: 10.1007/s00359-017-1221-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 10/05/2017] [Accepted: 10/08/2017] [Indexed: 12/25/2022]
Abstract
Chemical signals can provide useful information to potential mates and rivals. The production mechanisms of these signals are poorly understood in birds, despite emerging evidence that volatile compounds from preen oil may serve as chemosignals. Steroid hormones, including testosterone (T), may influence the production of these signals, yet variation in circulating T only partly accounts for this variation. We hypothesized that odor is a T-mediated signal of an individual's phenotype, regulated in part by androgen sensitivity in the uropygial gland. We quantified natural variation in chemosignals, T, uropygial gland androgen sensitivity, and aggressive behavior in dark-eyed juncos (Junco hyemalis). The interaction between circulating T and androgen receptor transcript abundance significantly correlated with volatile concentrations in male, but not female, preen oil. In both sexes, odorant variables correlated with aggressive response to an intruder. Our results suggest that preen oil volatiles could function as signals of aggressive intent, and, at least in males, may be regulated by local androgen receptor signaling in the uropygial gland. Because these behavioral and chemical traits have been linked with reproductive success, local regulation of androgen sensitivity in the periphery has the potential to be a target of selection in the evolution of avian olfactory signaling.
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Affiliation(s)
- Danielle J Whittaker
- BEACON Center for the Study of Evolution in Action, Michigan State University, 567 Wilson Rd. Room 1441, East Lansing, MI, 48824, USA.
| | - Kimberly A Rosvall
- Department of Biology, Indiana University, 1001 E. 3rd St., Bloomington, IN, 47405, USA
| | - Samuel P Slowinski
- Department of Biology, Indiana University, 1001 E. 3rd St., Bloomington, IN, 47405, USA
| | - Helena A Soini
- Department of Chemistry and Institute for Pheromone Research, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN, 47405, USA
| | - Milos V Novotny
- Department of Chemistry and Institute for Pheromone Research, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN, 47405, USA
| | - Ellen D Ketterson
- Department of Biology, Indiana University, 1001 E. 3rd St., Bloomington, IN, 47405, USA
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Affiliation(s)
- Ashok R Patel
- Faculty of Bioscience Engineering, Ghent University , Coupure Links 653, 9000 Gent, Belgium
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Huang C, Luo MT, Chen XF, Xiong L, Li XM, Chen XD. Recent advances and industrial viewpoint for biological treatment of wastewaters by oleaginous microorganisms. Bioresour Technol 2017; 232:398-407. [PMID: 28258805 DOI: 10.1016/j.biortech.2017.02.055] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 02/13/2017] [Accepted: 02/15/2017] [Indexed: 05/27/2023]
Abstract
Recently, technology of using oleaginous microorganisms for biological treatment of wastewaters has become one hot topic in biochemical and environmental engineering for its advantages such as easy for operation in basic bioreactor, having potential to produce valuable bio-products, efficient wastewaters treatment in short period, etc. To promote its industrialization, this article provides some comprehensive analysis of this technology such as its advances, issues, and outlook especially from industrial viewpoint. In detail, the types of wastewaters can be treated and the kinds of oleaginous microorganisms used for biological treatment are introduced, the potential of industrial application and issues (relatively low COD removal, low lipid yield, cost of operation, and lack of scale up application) of this technology are presented, and some critical outlook mainly on co-culture method, combination with other treatments, process controlling and adjusting are discussed systematically. By this article, some important information to develop this technology can be obtained.
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Affiliation(s)
- Chao Huang
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, PR China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, PR China
| | - Mu-Tan Luo
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xue-Fang Chen
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, PR China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, PR China
| | - Lian Xiong
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, PR China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, PR China
| | - Xiao-Mei Li
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, PR China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, PR China
| | - Xin-De Chen
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, PR China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, PR China.
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Bracharz F, Redai V, Bach K, Qoura F, Brück T. The effects of TORC signal interference on lipogenesis in the oleaginous yeast Trichosporon oleaginosus. BMC Biotechnol 2017; 17:27. [PMID: 28270203 PMCID: PMC5341401 DOI: 10.1186/s12896-017-0348-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 03/03/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Oleaginous organisms are a promising, renewable source of single cell oil. Lipid accumulation is mainly induced by limitation of nutrients such as nitrogen, phosphorus or sulfur. The oleaginous yeast Trichosporon oleaginosus accumulates up to 70% w/w lipid under nitrogen stress, while cultivation in non-limiting media only yields 9% w/w lipid. Uncoupling growth from lipid accumulation is key for the industrial process applicability of oleaginous yeasts. This study evaluates the effects of rapamycin on TOR specific signaling pathways associated with lipogenesis in Trichosporon oleaginosus for the first time. RESULTS Supplementation of rapamycin to nutrient rich cultivation medium led to an increase in lipid yield of up to 38% g/L. This effect plateaued at 40 μM rapamycin. Interestingly, the fatty acid spectrum resembled that observed with cultivation under nitrogen limitation. Significant changes in growth characteristics included a 19% increase in maximum cell density and a 12% higher maximum growth rate. T. oleaginosus only has one Tor gene much like the oleaginous yeast Rhodosporidium toruloides. Consequently, we analyzed the effect of rapamycin on T. oleaginosus specific TORC signaling using bioinformatic methodologies. CONCLUSIONS We confirm, that target of rapamycin complex 1 (TORC1) is involved in control of lipid production and cell proliferation in T. oleaginosus and present a homology based signaling network. Signaling of lipid induction by TORC1 and response to carbon depletion to this complex appear to be conserved, whereas response to nitrogen limitation and autophagy are not. This work serves as a basis for further investigation regarding the control and induction of lipid accumulation in oil yeasts.
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Affiliation(s)
- Felix Bracharz
- Industrial Biocatalysis Group, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Veronika Redai
- Industrial Biocatalysis Group, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Kathrin Bach
- Industrial Biocatalysis Group, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Farah Qoura
- Industrial Biocatalysis Group, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Thomas Brück
- Industrial Biocatalysis Group, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
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Alqaralleh RM, Kennedy K, Delatolla R, Sartaj M. Thermophilic and hyper-thermophilic co-digestion of waste activated sludge and fat, oil and grease: Evaluating and modeling methane production. J Environ Manage 2016; 183:551-561. [PMID: 27623367 DOI: 10.1016/j.jenvman.2016.09.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 08/30/2016] [Accepted: 09/01/2016] [Indexed: 06/06/2023]
Abstract
Renewable energy and clean environment are two crucial requirements for our modern world. Low cost, energy production and limited environmental impact make anaerobic digestion (AD) a promising technology for stabilizing organic waste and in particular, sewage waste. The anaerobic co-digestion of thickened waste activated sludge (TWAS) and sewage treatment plant trapped fat, oil and grease (FOG) using different FOG-TWAS mixtures (20, 40, 60 and 80% of FOG based on total volatile solids (TVS)) were investigated in this study using both thermophilic (55 ± 1 °C) and two stages hyper-thermophilic/thermophilic (70 ± 1 °C and 55 ± 1 °C) anaerobic co-digestion. The hyper-thermophilic co-digestion approach as a part of the co-digestion process has been shown to be very useful in improving the methane production. During hyper-thermophilic biochemical methane potential (BMP) assay testing the sample with 60% FOG (based on TVS) has been shown to significantly increase the maximum methane production to 673.1 ± 14.0 ml of methane as compared to 316.4 ± 14.3 ml of methane for the control sample. This represents a 112.7% increase in methane production compared to the control sample considered in this paper. These results signify the importance of hyper-thermophilic digestion to the co-digestion of TWAS-FOG field.
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Affiliation(s)
- Rania Mona Alqaralleh
- Department of Civil Engineering, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada.
| | - Kevin Kennedy
- Department of Civil Engineering, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Robert Delatolla
- Department of Civil Engineering, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Majid Sartaj
- Department of Civil Engineering, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
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Maurya R, Ghosh T, Saravaia H, Paliwal C, Ghosh A, Mishra S. Non-isothermal pyrolysis of de-oiled microalgal biomass: Kinetics and evolved gas analysis. Bioresour Technol 2016; 221:251-261. [PMID: 27643733 DOI: 10.1016/j.biortech.2016.09.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 09/03/2016] [Accepted: 09/06/2016] [Indexed: 06/06/2023]
Abstract
Non-isothermal (β=5, 10, 20, 35°C/min) pyrolysis of de-oiled microalgal biomass (DMB) of Chlorella variabilis was investigated by TGA-MS (30-900°C, Argon atmosphere) to understand thermal decomposition and evolved gas analysis (EGA). The results showed that three-stage thermal decomposition and three volatilization zone (100-400°C, 400-550°C and 600-750°C) of organic matters during pyrolysis. The highest rate of weight-loss is 8.91%/min at 302°C for 35°C/min heating-rate. Kinetics of pyrolysis were investigated by iso-conversional (KAS, FWO) and model-fitting (Coats-Redfern) method. For Zone-1and3, similar activation energy (Ea) is found in between KAS (α=0.4), FWO (α=0.4) and Avrami-Erofe'ev (n=4) model. Using the best-fitted kinetic model Avrami-Erofe'ev (n=4), Ea values (R2=>0.96) are 171.12 (Zone-1), 404.65 (Zone-2) and 691.42kJ/mol (Zone-3). EGA indicate the abundance of most gases observed consequently between 200-300°C and 400-500°C. The pyrolysis of DMB involved multi-step reaction mechanisms for solid-state reactions having different Ea values.
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Affiliation(s)
- Rahulkumar Maurya
- Division of Salt & Marine Chemicals, CSIR - Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India; Academy of Scientific & Innovative Research (AcSIR), CSIR - Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India
| | - Tonmoy Ghosh
- Division of Salt & Marine Chemicals, CSIR - Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India; Academy of Scientific & Innovative Research (AcSIR), CSIR - Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India
| | - Hitesh Saravaia
- Academy of Scientific & Innovative Research (AcSIR), CSIR - Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India; Analytical Division and Centralized Instrument Facility, CSIR - Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India
| | - Chetan Paliwal
- Division of Salt & Marine Chemicals, CSIR - Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India; Academy of Scientific & Innovative Research (AcSIR), CSIR - Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India
| | - Arup Ghosh
- Academy of Scientific & Innovative Research (AcSIR), CSIR - Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India; Division of Plant Omics, CSIR - Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India
| | - Sandhya Mishra
- Division of Salt & Marine Chemicals, CSIR - Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India; Academy of Scientific & Innovative Research (AcSIR), CSIR - Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India.
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Campisi T, Samorì C, Torri C, Barbera G, Foschini A, Kiwan A, Galletti P, Tagliavini E, Pasteris A. Chemical and ecotoxicological properties of three bio-oils from pyrolysis of biomasses. Ecotoxicol Environ Saf 2016; 132:87-93. [PMID: 27285282 DOI: 10.1016/j.ecoenv.2016.05.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 05/10/2016] [Accepted: 05/27/2016] [Indexed: 06/06/2023]
Abstract
In view of the potential use of pyrolysis-based technologies, it is crucial to understand the environmental hazards of pyrolysis-derived products, in particular bio-oils. Here, three bio-oils were produced from fast pyrolysis of pine wood and intermediate pyrolysis of corn stalk and poultry litter. They were fully characterized by chemical analysis and tested for their biodegradability and their ecotoxicity on the crustacean Daphnia magna and the green alga Raphidocelis subcapitata. These tests were chosen as required by the European REACH regulation. These three bio-oils were biodegradable, with 40-60% of biodegradation after 28 days, and had EC50 values above 100mgL(-1) for the crustacean and above 10mgL(-1) for the alga, showing low toxicity to the aquatic life. The toxic unit approach was applied to verify whether the observed toxicity could be predicted from the data available for the substances detected in the bio-oils. The predicted values largely underestimated the experimental values.
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Affiliation(s)
- Tiziana Campisi
- Centro Interdipartimentale di Ricerca Industriale Energia e Ambiente, University of Bologna, via S. Alberto 163, Ravenna, Italy
| | - Chiara Samorì
- Centro Interdipartimentale di Ricerca Industriale Energia e Ambiente, University of Bologna, via S. Alberto 163, Ravenna, Italy
| | - Cristian Torri
- Centro Interdipartimentale di Ricerca Industriale Energia e Ambiente, University of Bologna, via S. Alberto 163, Ravenna, Italy; Dipartimento di Chimica "Giacomo Ciamician", University of Bologna, via Selmi 2, Bologna, Italy
| | - Giuseppe Barbera
- Dipartimento di Scienze Biologiche, Geologiche e Ambientali, University of Bologna, via Selmi 3, Bologna, Italy
| | - Anna Foschini
- Dipartimento di Scienze Biologiche, Geologiche e Ambientali, University of Bologna, via Selmi 3, Bologna, Italy
| | - Alisar Kiwan
- Centro Interdipartimentale di Ricerca Industriale Energia e Ambiente, University of Bologna, via S. Alberto 163, Ravenna, Italy
| | - Paola Galletti
- Centro Interdipartimentale di Ricerca Industriale Energia e Ambiente, University of Bologna, via S. Alberto 163, Ravenna, Italy; Dipartimento di Chimica "Giacomo Ciamician", University of Bologna, via Selmi 2, Bologna, Italy
| | - Emilio Tagliavini
- Centro Interdipartimentale di Ricerca Industriale Energia e Ambiente, University of Bologna, via S. Alberto 163, Ravenna, Italy; Dipartimento di Chimica "Giacomo Ciamician", University of Bologna, via Selmi 2, Bologna, Italy
| | - Andrea Pasteris
- Centro Interdipartimentale di Ricerca Industriale Energia e Ambiente, University of Bologna, via S. Alberto 163, Ravenna, Italy; Dipartimento di Scienze Biologiche, Geologiche e Ambientali, University of Bologna, via Selmi 3, Bologna, Italy.
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Casoni AI, Zunino J, Piccolo MC, Volpe MA. Valorization of Rhizoclonium sp. algae via pyrolysis and catalytic pyrolysis. Bioresour Technol 2016; 216:302-307. [PMID: 27253478 DOI: 10.1016/j.biortech.2016.05.066] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 05/17/2016] [Accepted: 05/19/2016] [Indexed: 06/05/2023]
Abstract
The valorization of Rhizoclonium sp. algae through pyrolysis for obtaining bio-oils is studied in this work. The reaction is carried out at 400°C, at high contact time. The bio-oil has a practical yield of 35% and is rich in phytol. Besides, it is simpler than the corresponding to lignocellulosic biomass due to the absence of phenolic compounds. This property leads to a bio-oil relatively stable to storage. In addition, heterogeneous catalysts (Al-Fe/MCM-41, SBA-15 and Cu/SBA-15), in contact with algae during pyrolysis, are analyzed. The general trend is that the catalysts decrease the concentration of fatty alcohols and other high molecular weight products, since their mild acidity sites promote degradation reactions. Thus, the amount of light products increases upon the use of the catalysts. Particularly, acetol concentration in the bio-oils obtained from the catalytic pyrolysis with SBA-15 and Cu/SBA-15 is notably high.
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Affiliation(s)
- Andrés I Casoni
- Planta Piloto de Ingeniería Química, PLAPIQUI (CONICET-UNS), Florida 7500, 8000 Bahía Blanca, Argentina.
| | - Josefina Zunino
- Instituto Argentino de Oceanografía, IADO (CONICET), Florida 7500, 8000 Bahía Blanca, Argentina
| | - María C Piccolo
- Instituto Argentino de Oceanografía, IADO (CONICET), Florida 7500, 8000 Bahía Blanca, Argentina
| | - María A Volpe
- Planta Piloto de Ingeniería Química, PLAPIQUI (CONICET-UNS), Florida 7500, 8000 Bahía Blanca, Argentina
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Bharathiraja B, Ranjith Kumar R, PraveenKumar R, Chakravarthy M, Yogendran D, Jayamuthunagai J. Biodiesel production from different algal oil using immobilized pure lipase and tailor made rPichia pastoris with Cal A and Cal B genes. Bioresour Technol 2016; 213:69-78. [PMID: 26906444 DOI: 10.1016/j.biortech.2016.02.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2015] [Revised: 02/09/2016] [Accepted: 02/10/2016] [Indexed: 06/05/2023]
Abstract
In this investigation, oil extraction was performed in marine macroalgae Gracilaria edulis, Enteromorpha compressa and Ulva lactuca. The algal biomass was characterized by Scanning Electron Microscopy and Fourier Transform-Infra Red Spectroscopy. Six different pre-treatment methods were carried out to evaluate the best method for maximum oil extraction. Optimization of extraction parameters were performed and high oil yield was obtained at temperature 55°C, time 150min, particle size 0.10mm, solvent-to-solid ratio 6:1 and agitation rate 500rpm. After optimization, 9.5%, 12.18% and 10.50 (g/g) of oil extraction yield was achieved from the respective algal biomass. The rate constant for extraction was obtained as first order kinetics, by differential method. Stable intracellular Cal A and Cal B lipase producing recombinant Pichia pastoris was constructed and used as biocatalyst for biodiesel production. Comparative analysis of lipase activity and biodiesel yield was made with immobilized Candida antarctica lipase.
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Affiliation(s)
- B Bharathiraja
- Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Avadi, Chennai 600062, Tamilnadu, India.
| | - R Ranjith Kumar
- Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Avadi, Chennai 600062, Tamilnadu, India
| | - R PraveenKumar
- Department of Biotechnology, Anna Bio Research Foundation, Arunai Engineering College, Tiruvannamalai, Tamilnadu, India
| | - M Chakravarthy
- Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Avadi, Chennai 600062, Tamilnadu, India
| | - D Yogendran
- Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Avadi, Chennai 600062, Tamilnadu, India
| | - J Jayamuthunagai
- Centre for Biotechnology, Anna University, Chennai 600025, Tamilnadu, India
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42
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Omoriyekomwan JE, Tahmasebi A, Yu J. Production of phenol-rich bio-oil during catalytic fixed-bed and microwave pyrolysis of palm kernel shell. Bioresour Technol 2016; 207:188-196. [PMID: 26890793 DOI: 10.1016/j.biortech.2016.02.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 01/31/2016] [Accepted: 02/01/2016] [Indexed: 06/05/2023]
Abstract
Catalytic fixed-bed and microwave pyrolysis of palm kernel shell using activated carbon (AC) and lignite char (LC) as catalysts and microwave receptors are investigated. The effects of process parameters including temperature and biomass:catalyst ratio on the yield and composition of pyrolysis products were studied. The addition of catalyst increased the bio-oil yield, but decreased the selectivity of phenol in fixed-bed. Catalytic microwave pyrolysis of PKS significantly enhanced the selectivity of phenol production. The highest concentration of phenol in bio-oil of 64.58 %(area) and total phenolics concentration of 71.24 %(area) were obtained at 500°C using AC. Fourier transform infrared spectroscopy (FTIR) results indicated that concentration of OH, CH, CO and CO functional groups in char samples decreased after pyrolysis. Scanning electron microscopy (SEM) analysis clearly indicated the development of liquid phase in biomass particles during microwave pyrolysis, and the mechanism is also discussed.
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Affiliation(s)
- Joy Esohe Omoriyekomwan
- Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China
| | - Arash Tahmasebi
- Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China
| | - Jianglong Yu
- Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China; Chemical Engineering, University of Newcastle, Callaghan, NSW 2308, Australia.
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43
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Wagner J, Bransgrove R, Beacham TA, Allen MJ, Meixner K, Drosg B, Ting VP, Chuck CJ. Co-production of bio-oil and propylene through the hydrothermal liquefaction of polyhydroxybutyrate producing cyanobacteria. Bioresour Technol 2016; 207:166-174. [PMID: 26881334 DOI: 10.1016/j.biortech.2016.01.114] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 01/28/2016] [Accepted: 01/29/2016] [Indexed: 06/05/2023]
Abstract
A polyhydroxybutyrate (PHB) producing cyanobacteria was converted through hydrothermal liquefaction (HTL) into propylene and a bio-oil suitable for advanced biofuel production. HTL of model compounds demonstrated that in contrast to proteins and carbohydrates, no synergistic effects were detected when converting PHB in the presence of algae. Subsequently, Synechocystis cf. salina, which had accumulated 7.5wt% PHB was converted via HTL (15% dry weight loading, 340°C). The reaction gave an overall propylene yield of 2.6%, higher than that obtained from the model compounds, in addition to a bio-oil with a low nitrogen content of 4.6%. No propylene was recovered from the alternative non-PHB producing cyanobacterial strains screened, suggesting that PHB is the source of propylene. PHB producing microorganisms could therefore be used as a feedstock for a biorefinery to produce polypropylene and advanced biofuels, with the level of propylene being proportional to the accumulated amount of PHB.
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Affiliation(s)
- Jonathan Wagner
- Centre for Doctoral Training in Sustainable Chemical Technologies, Department of Chemical Engineering, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Rachel Bransgrove
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom
| | - Tracey A Beacham
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom
| | - Michael J Allen
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom
| | - Katharina Meixner
- Institute for Environmental Biotechnology, IFA-Tulln, University of Natural Resources and Life Sciences, Vienna, Konrad-Lorenz Straße 20, 3430 Tulln, Austria
| | - Bernhard Drosg
- Institute for Environmental Biotechnology, IFA-Tulln, University of Natural Resources and Life Sciences, Vienna, Konrad-Lorenz Straße 20, 3430 Tulln, Austria
| | - Valeska P Ting
- Department of Chemical Engineering, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Christopher J Chuck
- Department of Chemical Engineering, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom.
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44
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Ali N, Dashti N, Salamah S, Sorkhoh N, Al-Awadhi H, Radwan S. Dynamics of bacterial populations during bench-scale bioremediation of oily seawater and desert soil bioaugmented with coastal microbial mats. Microb Biotechnol 2016; 9:157-71. [PMID: 26751253 PMCID: PMC4767282 DOI: 10.1111/1751-7915.12326] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 09/09/2015] [Accepted: 09/09/2015] [Indexed: 11/28/2022] Open
Abstract
This study describes a bench-scale attempt to bioremediate Kuwaiti, oily water and soil samples through bioaugmentation with coastal microbial mats rich in hydrocarbonoclastic bacterioflora. Seawater and desert soil samples were artificially polluted with 1% weathered oil, and bioaugmented with microbial mat suspensions. Oil removal and microbial community dynamics were monitored. In batch cultures, oil removal was more effective in soil than in seawater. Hydrocarbonoclastic bacteria associated with mat samples colonized soil more readily than seawater. The predominant oil degrading bacterium in seawater batches was the autochthonous seawater species Marinobacter hydrocarbonoclasticus. The main oil degraders in the inoculated soil samples, on the other hand, were a mixture of the autochthonous mat and desert soil bacteria; Xanthobacter tagetidis, Pseudomonas geniculata, Olivibacter ginsengisoli and others. More bacterial diversity prevailed in seawater during continuous than batch bioremediation. Out of seven hydrocarbonoclastic bacterial species isolated from those cultures, only one, Mycobacterium chlorophenolicum, was of mat origin. This result too confirms that most of the autochthonous mat bacteria failed to colonize seawater. Also culture-independent analysis of seawater from continuous cultures revealed high-bacterial diversity. Many of the bacteria belonged to the Alphaproteobacteria, Flavobacteria and Gammaproteobacteria, and were hydrocarbonoclastic. Optimal biostimulation practices for continuous culture bioremediation of seawater via mat bioaugmentation were adding the highest possible oil concentration as one lot in the beginning of bioremediation, addition of vitamins, and slowing down the seawater flow rate.
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Affiliation(s)
- Nidaa Ali
- Microbiology Program, Department of Biological Sciences, Faculty of Science, Kuwait University, PO Box 5969, Safat, 13060, Kuwait
| | - Narjes Dashti
- Microbiology Program, Department of Biological Sciences, Faculty of Science, Kuwait University, PO Box 5969, Safat, 13060, Kuwait
| | - Samar Salamah
- Microbiology Program, Department of Biological Sciences, Faculty of Science, Kuwait University, PO Box 5969, Safat, 13060, Kuwait
| | - Naser Sorkhoh
- Microbiology Program, Department of Biological Sciences, Faculty of Science, Kuwait University, PO Box 5969, Safat, 13060, Kuwait
| | - Husain Al-Awadhi
- Microbiology Program, Department of Biological Sciences, Faculty of Science, Kuwait University, PO Box 5969, Safat, 13060, Kuwait
| | - Samir Radwan
- Microbiology Program, Department of Biological Sciences, Faculty of Science, Kuwait University, PO Box 5969, Safat, 13060, Kuwait
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45
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Chen G, He Z, Yu X, Wang T, Gao C, Song L, Wu H, Yin C, Luo S, Zhang Y, Gu N. Size-Dependent Biodistribution of lodinated Oil Nanoemulsions Observed by Dual-Modal Imaging in Rats. J Nanosci Nanotechnol 2016; 16:2474-2481. [PMID: 27455657 DOI: 10.1166/jnn.2016.12546] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Sizes of nanoscale contrast agents play an important role in targeting specific organs and distribution in organisms. lodinated oil nanoemulsions with uniform size distribution and containing indocyanine green (ICG) fluorescent dye (25 nm, 60 nm, 100 nm) were synthesized by stirring, combined with ultrasonic emulsification technique. Rats were intravenously injected with the iodinated oil nanoemulsions with different sizes, used as contrast agents, and investigated with enhanced computed tomography (CT) and fluorescence imaging. Through experiments, the distribution and metabolism of the contrast agents in rat's bodies were studied, and their influence on enhanced CT imaging of different organs was compared. The results demonstrated that target accumulating organs for the iodinated oil nanoemulsions were liver and spleen, with obvious dosage-dependence. Large sized nanoemulsion preferred to accumulate into spleen, and liver, and the phagocytosis was getting weaker with the decrease of the nanoemulsion size. The CT imaging of the inferior vena cava was rapidly enhanced and reached the highest point after administration of the nanoemulsion. The nanoemulsion gradually gathered and metabolized in the spleen and liver, resulting in rapidly decreased CT imaging, with weak rebound, of the inferior vena cava.
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46
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Dimitrov SD, Georgieva DG, Pavlov TS, Karakolev YH, Karamertzanis PG, Rasenberg M, Mekenyan OG. UVCB substances: methodology for structural description and application to fate and hazard assessment. Environ Toxicol Chem 2015; 34:2450-62. [PMID: 26053589 DOI: 10.1002/etc.3100] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 04/30/2015] [Accepted: 06/01/2015] [Indexed: 05/20/2023]
Abstract
Substances of unknown or variable composition, complex reaction products, or biological materials (UVCBs) have been conventionally described in generic terms. Commonly used substance identifiers are generic names of chemical classes, generic structural formulas, reaction steps, physical-chemical properties, or spectral data. Lack of well-defined structural information has significantly restricted in silico fate and hazard assessment of UVCB substances. A methodology for the structural description of UVCB substances has been developed that allows use of known identifiers for coding, generation, and selection of representative constituents. The developed formats, Generic Simplified Molecular-Input Line-Entry System (G SMILES) and Generic Graph (G Graph), address the need to code, generate, and select representative UVCB constituents; G SMILES is a SMILES-based single line notation coding fixed and variable structural features of UVCBs, whereas G Graph is based on a workflow paradigm that allows generation of constituents coded in G SMILES and end point-specific or nonspecific selection of representative constituents. Structural description of UVCB substances as afforded by the developed methodology is essential for in silico fate and hazard assessment. Data gap filling approaches such as read-across, trend analysis, or quantitative structure-activity relationship modeling can be applied to the generated constituents, and the results can be used to assess the substance as a whole. The methodology also advances the application of category-based data gap filling approaches to UVCB substances.
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Affiliation(s)
- Sabcho D Dimitrov
- Laboratory of Mathematical Chemistry, University "Prof. Asen Zlatarov," Burgas, Bulgaria
| | - Denitsa G Georgieva
- Laboratory of Mathematical Chemistry, University "Prof. Asen Zlatarov," Burgas, Bulgaria
| | - Todor S Pavlov
- Laboratory of Mathematical Chemistry, University "Prof. Asen Zlatarov," Burgas, Bulgaria
| | - Yordan H Karakolev
- Laboratory of Mathematical Chemistry, University "Prof. Asen Zlatarov," Burgas, Bulgaria
| | | | | | - Ovanes G Mekenyan
- Laboratory of Mathematical Chemistry, University "Prof. Asen Zlatarov," Burgas, Bulgaria
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Lindquist MR, López-Núñez JC, Jones MA, Cox EJ, Pinkelman RJ, Bang SS, Moser BR, Jackson MA, Iten LB, Kurtzman CP, Bischoff KM, Liu S, Qureshi N, Tasaki K, Rich JO, Cotta MA, Saha BC, Hughes SR. Irradiation of Yarrowia lipolytica NRRL YB-567 creating novel strains with enhanced ammonia and oil production on protein and carbohydrate substrates. Appl Microbiol Biotechnol 2015; 99:9723-43. [PMID: 26272089 PMCID: PMC4628078 DOI: 10.1007/s00253-015-6852-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 07/12/2015] [Accepted: 07/15/2015] [Indexed: 01/05/2023]
Abstract
Increased interest in sustainable production of renewable diesel and other valuable bioproducts is redoubling efforts to improve economic feasibility of microbial-based oil production. Yarrowia lipolytica is capable of employing a wide variety of substrates to produce oil and valuable co-products. We irradiated Y. lipolytica NRRL YB-567 with UV-C to enhance ammonia (for fertilizer) and lipid (for biodiesel) production on low-cost protein and carbohydrate substrates. The resulting strains were screened for ammonia and oil production using color intensity of indicators on plate assays. Seven mutant strains were selected (based on ammonia assay) and further evaluated for growth rate, ammonia and oil production, soluble protein content, and morphology when grown on liver infusion medium (without sugars), and for growth on various substrates. Strains were identified among these mutants that had a faster doubling time, produced higher maximum ammonia levels (enzyme assay) and more oil (Sudan Black assay), and had higher maximum soluble protein levels (Bradford assay) than wild type. When grown on plates with substrates of interest, all mutant strains showed similar results aerobically to wild-type strain. The mutant strain with the highest oil production and the fastest doubling time was evaluated on coffee waste medium. On this medium, the strain produced 0.12 g/L ammonia and 0.20 g/L 2-phenylethanol, a valuable fragrance/flavoring, in addition to acylglycerols (oil) containing predominantly C16 and C18 residues. These mutant strains will be investigated further for potential application in commercial biodiesel production.
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Affiliation(s)
- Mitch R Lindquist
- United States Department of Agriculture (USDA), Agricultural Research Service (ARS), National Center for Agricultural Utilization Research (NCAUR), Renewable Product Technology Research Unit, 1815 North University Street, Peoria, IL, 61604, USA
| | - Juan Carlos López-Núñez
- National Coffee Research Centre - Cenicafe, National Federation of Coffee Growers of Colombia - FNC, Cenicafé Planalto Km 4 vía Antigua Chinchiná, Manizales, Caldas, Colombia
| | - Marjorie A Jones
- 4160 Department of Chemistry, Illinois State University, 214 Julian Hall, Normal, IL, 61790-4160, USA
| | - Elby J Cox
- United States Department of Agriculture (USDA), Agricultural Research Service (ARS), National Center for Agricultural Utilization Research (NCAUR), Renewable Product Technology Research Unit, 1815 North University Street, Peoria, IL, 61604, USA
| | - Rebecca J Pinkelman
- South Dakota School of Mines & Technology, Chemical and Biological Engineering, 501 East Saint Joseph Street, Rapid City, SD, 57701-3995, USA
| | - Sookie S Bang
- South Dakota School of Mines & Technology, Chemical and Biological Engineering, 501 East Saint Joseph Street, Rapid City, SD, 57701-3995, USA
| | - Bryan R Moser
- USDA, ARS, NCAUR, Bio-oils Research Unit, 1815 North University Street, Peoria, IL, 61604, USA
| | - Michael A Jackson
- United States Department of Agriculture (USDA), Agricultural Research Service (ARS), National Center for Agricultural Utilization Research (NCAUR), Renewable Product Technology Research Unit, 1815 North University Street, Peoria, IL, 61604, USA
| | - Loren B Iten
- USDA, ARS, NCAUR, Bioenergy Research Unit, 1815 North University Street, Peoria, IL, 61604, USA
| | - Cletus P Kurtzman
- USDA, ARS, NCAUR, Bacterial Foodborne Pathogens and Mycology Research Unit, 1815 North University Street, Peoria, IL, 61604, USA
| | - Kenneth M Bischoff
- United States Department of Agriculture (USDA), Agricultural Research Service (ARS), National Center for Agricultural Utilization Research (NCAUR), Renewable Product Technology Research Unit, 1815 North University Street, Peoria, IL, 61604, USA
| | - Siqing Liu
- United States Department of Agriculture (USDA), Agricultural Research Service (ARS), National Center for Agricultural Utilization Research (NCAUR), Renewable Product Technology Research Unit, 1815 North University Street, Peoria, IL, 61604, USA
| | - Nasib Qureshi
- USDA, ARS, NCAUR, Bioenergy Research Unit, 1815 North University Street, Peoria, IL, 61604, USA
| | - Kenneth Tasaki
- Mitsubishi Chemical, USMC Research & Innovation, 410 Palos Verdes Blvd, Redondo Beach, CA, 90277, USA
| | - Joseph O Rich
- United States Department of Agriculture (USDA), Agricultural Research Service (ARS), National Center for Agricultural Utilization Research (NCAUR), Renewable Product Technology Research Unit, 1815 North University Street, Peoria, IL, 61604, USA
| | - Michael A Cotta
- USDA, ARS, NCAUR, Bioenergy Research Unit, 1815 North University Street, Peoria, IL, 61604, USA
| | - Badal C Saha
- USDA, ARS, NCAUR, Bioenergy Research Unit, 1815 North University Street, Peoria, IL, 61604, USA
| | - Stephen R Hughes
- United States Department of Agriculture (USDA), Agricultural Research Service (ARS), National Center for Agricultural Utilization Research (NCAUR), Renewable Product Technology Research Unit, 1815 North University Street, Peoria, IL, 61604, USA.
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48
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Camacho S, van Eck A, van de Velde F, Stieger M. Formation Dynamics of Oral Oil Coatings and Their Effect on Subsequent Sweetness Perception of Liquid Stimuli. J Agric Food Chem 2015; 63:8025-8030. [PMID: 26301742 DOI: 10.1021/acs.jafc.5b02562] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Knowledge of the formation of oral coatings and their influence on subsequent taste perception is necessary to understand possible taste-masking effects by oil coatings. This study investigated (a) the dynamics of the formation of oral oil coatings formed by o/w emulsions and (b) the effect of oral oil coatings on subsequent sweetness perception of sucrose solutions. In vivo fluorescence was used to quantitate the oil fraction deposited on the tongue after oral processing of oil-in-water emulsions for different times. A trained panel evaluated sweetness perception of sucrose solutions after orally processing the emulsions. The oil fraction reached its maximum value within the first 3 s of oral processing. The oil fraction did not significantly affect subsequent sweetness perception of sucrose solutions. It is suggested that the oil droplets deposited on the tongue did not form a hydrophobic barrier that is sufficient to reduce the accessibility of sucrose to taste buds.
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Affiliation(s)
- Sara Camacho
- TI Food and Nutrition , P.O. Box 557, 6700 AN Wageningen, The Netherlands
- Agrotechnology and Food Sciences Group, Wageningen University , P.O. Box 8129, 6700 EV Wageningen, The Netherlands
| | - Arianne van Eck
- Agrotechnology and Food Sciences Group, Wageningen University , P.O. Box 8129, 6700 EV Wageningen, The Netherlands
| | - Fred van de Velde
- TI Food and Nutrition , P.O. Box 557, 6700 AN Wageningen, The Netherlands
- NIZO Food Research BV , P.O. Box 20, 6710 BA Ede, The Netherlands
| | - Markus Stieger
- TI Food and Nutrition , P.O. Box 557, 6700 AN Wageningen, The Netherlands
- Agrotechnology and Food Sciences Group, Wageningen University , P.O. Box 8129, 6700 EV Wageningen, The Netherlands
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49
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Watanabe H, Li D, Nakagawa Y, Tomishige K, Watanabe MM. Catalytic gasification of oil-extracted residue biomass of Botryococcus braunii. Bioresour Technol 2015; 191:452-459. [PMID: 25817421 DOI: 10.1016/j.biortech.2015.03.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 03/04/2015] [Accepted: 03/06/2015] [Indexed: 06/04/2023]
Abstract
Catalytic gasification of the oil-extracted residue biomass of Botryococcus braunii was demonstrated in a laboratory-scale continuous feeding dual bed reactor. Steam gasification at 1023 K over Ni-Fe/Mg/Al catalyst can completely reform tar derived from pyrolysis of the residue biomass into C1 gases and hydrogen, and has achieved 91%-C conversion to gaseous product (CO+CO2+CH4). Composition of product gas has higher contents of CO and H2 with their ratio (H2/CO) of around 2.4 which is slightly H2-rich syngas. Maximum hydrogen yield of 74.7 mmol g-biomass(-1) obtained in this work is much higher than that from gasification of other algal biomass reported in literature. The residue biomass of B. braunii can be a superior renewable source of syngas or hydrogen.
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Affiliation(s)
- Hideo Watanabe
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8572, Japan.
| | - Dalin Li
- Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - Yoshinao Nakagawa
- Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - Keiichi Tomishige
- Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - Makoto M Watanabe
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8572, Japan
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50
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Dadrasnia A, Ismail S. Biosurfactant Production by Bacillus salmalaya for Lubricating Oil Solubilization and Biodegradation. Int J Environ Res Public Health 2015; 12:9848-63. [PMID: 26295402 PMCID: PMC4555315 DOI: 10.3390/ijerph120809848] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 07/19/2015] [Accepted: 07/27/2015] [Indexed: 02/07/2023]
Abstract
This study investigated the capability of a biosurfactant produced by a novel strain of Bacillus salmalaya to enhance the biodegradation rates and bioavailability of organic contaminants. The biosurfactant produced by cultured strain 139SI showed high physicochemical properties and surface activity in the selected medium. The biosurfactant exhibited a high emulsification index and a positive result in the drop collapse test, with the results demonstrating the wetting activity of the biosurfactant and its potential to produce surface-active molecules. Strain 139SI can significantly reduce the surface tension (ST) from 70.5 to 27 mN/m, with a critical micelle concentration of 0.4%. Moreover, lubricating oil at 2% (v/v) was degraded on Day 20 (71.5). Furthermore, the biosurfactant demonstrated high stability at different ranges of salinity, pH, and temperature. Overall, the results indicated the potential use of B. salmalaya 139SI in environmental remediation processes.
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Affiliation(s)
- Arezoo Dadrasnia
- Department of Biohealth Science, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Salmah Ismail
- Department of Biohealth Science, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
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