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Green strategies to control redox potential in the fermented food industry. Food Res Int 2022; 156:111154. [DOI: 10.1016/j.foodres.2022.111154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 03/12/2022] [Accepted: 03/15/2022] [Indexed: 11/18/2022]
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2
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Sun Y, Li D, Yu Y, Chen J, Fan W. Separation and Characterization of Cellulose Fibers from Cannabis Bast Using Foamed Nickel by Cathodic Electro-Fenton Oxidation Strategy. Polymers (Basel) 2022; 14:polym14030380. [PMID: 35160369 PMCID: PMC8838538 DOI: 10.3390/polym14030380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 01/09/2022] [Accepted: 01/11/2022] [Indexed: 11/16/2022] Open
Abstract
Degumming is the most important link in the textile industry. The main purpose of degumming is to effectively remove non-cellulose substances in plant bast fibers. In this research, we propose an electro-Fenton (EF) system with a nickel-foam (Ni-F) cathode in weak acid pH (EF/Ni-F) to degum cannabis fiber in EF while reducing the content of pollutants in degumming wastewater. FT-IR, XPS, XRD, SEM, and TG were employed to thoroughly understand the reaction characteristics to characterize chemical components, element qualities, the crystallinity, and the morphologies of degummed fibers. Additionally, physical and mechanical properties such as breaking strength, elongation at breaking, residual glue rate, whiteness, and diameter of degummed fibers were measured. Through testing, it was found that the fiber degummed by the EF method had higher breaking strength, lower residual tackiness, and higher whiteness than other methods. The antibacterial test was used to detect the effect of fiber on Staphylococcus aureus before and after degumming. EF could remove more colloidal components from cannabis than other methods, and the mechanical properties were also enhanced. The characteristics of the degummed fiber further confirmed the effectiveness of the new degumming method. Moreover, the antibacterial experiment found that the antibacterial property of the degummed fiber was enhanced. The colloidal components in the degumming wastewater were flocculated and precipitated. The upper liquid of the solution had low chromaticity, low COD value, and weak acid pH value, which can meet the discharge requirements. The above test proves that EF is an effective degumming method that is environmentally friendly, takes less time, and enhances antibacterial performance.
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Affiliation(s)
- Ying Sun
- College of Light Industry and Textile, Qiqihar University, Qiqihar 161000, China; (D.L.); (Y.Y.); (J.C.); (W.F.)
- Engineering Research Center of Flax Processing Technology, Ministry of Education, Qiqihar University, Qiqihar 161006, China
- Correspondence:
| | - Duanxin Li
- College of Light Industry and Textile, Qiqihar University, Qiqihar 161000, China; (D.L.); (Y.Y.); (J.C.); (W.F.)
| | - Yang Yu
- College of Light Industry and Textile, Qiqihar University, Qiqihar 161000, China; (D.L.); (Y.Y.); (J.C.); (W.F.)
| | - Jialin Chen
- College of Light Industry and Textile, Qiqihar University, Qiqihar 161000, China; (D.L.); (Y.Y.); (J.C.); (W.F.)
| | - Wanyue Fan
- College of Light Industry and Textile, Qiqihar University, Qiqihar 161000, China; (D.L.); (Y.Y.); (J.C.); (W.F.)
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Growth and viability of Lactobacillus acidophilus NRRL B-4495, Lactobacillus casei NRRL B-1922 and Lactobacillus plantarum NRRL B-4496 in milk supplemented with cysteine, ascorbic acid and tocopherols. Int Dairy J 2019. [DOI: 10.1016/j.idairyj.2019.05.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Ma H, Yang J, Jia Y, Wang Q, Ma X, Sonomoto K. Alleviation of harmful effect in stillage reflux in food waste ethanol fermentation based on metabolic and side-product accumulation regulation. BIORESOURCE TECHNOLOGY 2016; 218:463-468. [PMID: 27394991 DOI: 10.1016/j.biortech.2016.06.123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 06/28/2016] [Accepted: 06/29/2016] [Indexed: 06/06/2023]
Abstract
Stillage reflux fermentation in food waste ethanol fermentation could reduce sewage discharge but exert a harmful effect because of side-product accumulation. In this study, regulation methods based on metabolic regulation and side-product alleviation were conducted. Result demonstrated that controlling the proper oxidation-reduction potential value (-150mV to -250mV) could reduce the harmful effect, improve ethanol yield by 21%, and reduce fermentation time by 20%. The methods of adding calcium carbonate to adjust the accumulated lactic acid showed that ethanol yield increased by 17.3%, and fermentation time decreased by 20%. The accumulated glyceal also shows that these two methods can reduce the harmful effect. Fermentation time lasted for seven times without effect, and metabolic regulation had a better effect than side-product regulation.
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Affiliation(s)
- Hongzhi Ma
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, China.
| | - Jian Yang
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, China
| | - Yan Jia
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, China
| | - Qunhui Wang
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, China
| | - Xiaoyu Ma
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing, China
| | - Kenji Sonomoto
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
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Hakobyan L, Harutyunyan K, Harutyunyan N, Melik-Andreasyan G, Trchounian A. Adhesive Properties and Acid-Forming Activity of Lactobacilli and Streptococci Under Inhibitory Substances, Such as Nitrates. Curr Microbiol 2016; 72:776-82. [PMID: 26942420 DOI: 10.1007/s00284-016-1017-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 01/24/2016] [Indexed: 01/13/2023]
Abstract
One of the main requirements for probiotics is their ability to survive during passage through gastrointestinal tract and to maintain their activity at different adverse conditions. The aim of the study was to look for the strains of lactobacilli and streptococci with high adhesive properties even affected by inhibitory substances, such as nitrates (NO3 (-)). To study the adhesion properties hemagglutination reaction of bacterial cells with red blood cells of different animals and humans was used. The acid formation ability of bacteria was determined by the method of titration after 7 days of incubation in the sterile milk. These properties were investigated at different concentrations of NO3 (-). The high concentration (mostly ≥2.0 %) NO3 (-) inhibited the growth of both lactobacilli and streptococci, but compared with streptococcal cultures lactobacilli, especially Lactobacillus acidophilus Ep 317/402, have shown more stability and higher adhesive properties. In addition, the concentrations of NO3 (-) of 0.5-2.0 % decreased the acid-forming activity of the strains, but even under these conditions they coagulated milk and, in comparison to control, formed low acidity in milk. Thus, the L. acidophilus Ep 317/402 with high adhesive properties has demonstrated a higher activity of NO3 (-) transformation.
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Affiliation(s)
- L Hakobyan
- Institute of Microbiology, Scientific and Production Center "Armbiotechnology", National Academy of Sciences of Armenia, 0056, Yerevan, Armenia
| | - K Harutyunyan
- Institute of Microbiology, Scientific and Production Center "Armbiotechnology", National Academy of Sciences of Armenia, 0056, Yerevan, Armenia.,Department of Microbiology, Plants and Microbes Biotechnology, Faculty of Biology, Yerevan State University, 1 A. Manoukian Str., 0025, Yerevan, Armenia
| | - N Harutyunyan
- Institute of Epidemiology, Virology and Medical Parasitology After A.B. Alexanyan Ministry of Health of Armenia, 0060, Yerevan, Armenia
| | - G Melik-Andreasyan
- Institute of Epidemiology, Virology and Medical Parasitology After A.B. Alexanyan Ministry of Health of Armenia, 0060, Yerevan, Armenia
| | - A Trchounian
- Department of Microbiology, Plants and Microbes Biotechnology, Faculty of Biology, Yerevan State University, 1 A. Manoukian Str., 0025, Yerevan, Armenia.
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Ghazaryan A, Blbulyan S, Poladyan A, Trchounian A. Redox stress in geobacilli from geothermal springs: Phenomenon and membrane-associated response mechanisms. Bioelectrochemistry 2015; 105:1-6. [DOI: 10.1016/j.bioelechem.2015.04.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 04/08/2015] [Indexed: 10/23/2022]
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Comparable effects of low-intensity electromagnetic irradiation at the frequency of 51.8 and 53 GHz and antibiotic ceftazidime on Lactobacillus acidophilus growth and survival. Cell Biochem Biophys 2014; 67:829-35. [PMID: 23516095 DOI: 10.1007/s12013-013-9571-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The effects of low-intensity electromagnetic irradiation (EMI) with the frequencies of 51.8 and 53 GHz on Lactobacillus acidophilus growth and survival were revealed. These effects were compared with antibacterial effects of antibiotic ceftazidime. Decrease in bacterial growth rate by EMI was comparable with the inhibitory effect of ceftazidime (minimal inhibitory concentration-16 μM) and no enhanced action was observed with combined effects of EMI and the antibiotic. However, EMI-enhanced antibiotic inhibitory effect on bacterial survival. The kinetics of the bacterial suspension oxidation-reduction potential up to 24 h of the growth was changed by EMI and ceftazidime. The changes were more strongly expressed by combined effects of EMI and antibiotic especially up to 12 h. Moreover, EMI did not change overall energy (glucose)-dependent H(+) efflux across the membrane but it increased N,N'-dicyclohexylcarbodiimide (DCCD)-inhibited H(+) efflux. In contrast, this EMI in combination with ceftazidime decreased DCCD-sensitive H(+) efflux. Low-intensity EMI had inhibitory effect on L. acidophilus bacterial growth and survival. The effect on bacterial survival was more significant in the combination with ceftazidime. The H(+)-translocating F 0 F 1-ATPase, for which DCCD is specific inhibitor, might be a target for EMI and ceftazidime. The revealed bactericide effects on L. acidophilus can be applied in biotechnology, food producing and safety technology.
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Poladyan A, Avagyan A, Vassilian A, Trchounian A. Oxidative and Reductive Routes of Glycerol and Glucose Fermentation by Escherichia coli Batch Cultures and Their Regulation by Oxidizing and Reducing Reagents at Different pHs. Curr Microbiol 2012; 66:49-55. [DOI: 10.1007/s00284-012-0240-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 09/04/2012] [Indexed: 10/27/2022]
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Meneses-Acosta A, Gómez A, Ramírez OT. Control of redox potential in hybridoma cultures: effects on MAb production, metabolism, and apoptosis. ACTA ACUST UNITED AC 2012; 39:1189-98. [DOI: 10.1007/s10295-012-1125-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Accepted: 03/27/2012] [Indexed: 12/17/2022]
Abstract
Abstract
Culture redox potential (CRP) has proven to be a valuable monitoring tool in several areas of biotechnology; however, it has been scarcely used in animal cell culture. In this work, a proportional feedback control was employed, for the first time, to maintain the CRP at different constant values in hybridoma batch cultures for production of a monoclonal antibody (MAb). Reducing and oxidant conditions, in the range of −130 and +70 mV, were maintained in 1-l bioreactors through automatic control of the inlet gas composition. Cultures at constant DOT, in the range of 3 and 300 %, were used for comparison. The effect of constant CRP on cell concentration, MAb production, metabolism of glucose, glutamine, thiols, oxygen consumption, and programmed cell death, was evaluated. Reducing conditions resulted in the highest viable cell and MAb concentrations and thiols production, whereas specific glucose and glutamine consumption rates remained at the lowest values. In such conditions, programmed cell death, particularly apoptosis, occurred only after nutrient exhaustion. The optimum specific MAb production rate occurred at intermediate CRP levels. Oxidant conditions resulted in a detrimental effect in all culture parameters, increasing the specific glucose, glutamine, and oxygen consumption rates and inducing the apoptotic process, which was detected as early as 24 h even when glutamine and glucose were present at non-limiting concentrations. In most cases, such results were similar to those obtained in control cultures at constant DOT.
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Affiliation(s)
- Angélica Meneses-Acosta
- grid.9486.3 0000000121590001 Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología Universidad Nacional Autónoma de México Apdo. Postal. 510-3 62250 Cuernavaca Morelos Mexico
- grid.412873.b 0000000404841712 Facultad de Farmacia Universidad Autónoma del Estado de Morelos Av. Universidad 1010, Col. Chamilpa 62100 Cuernavaca Morelos Mexico
| | - Alfonso Gómez
- grid.9486.3 0000000121590001 Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología Universidad Nacional Autónoma de México Apdo. Postal. 510-3 62250 Cuernavaca Morelos Mexico
| | - Octavio T Ramírez
- grid.9486.3 0000000121590001 Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología Universidad Nacional Autónoma de México Apdo. Postal. 510-3 62250 Cuernavaca Morelos Mexico
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Di Virgilio AL, Reigosa M, de Mele MFL. Biocompatibility of magnesium particles evaluated by in vitro cytotoxicity and genotoxicity assays. J Biomed Mater Res B Appl Biomater 2011; 99:111-9. [DOI: 10.1002/jbm.b.31877] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 04/14/2011] [Accepted: 04/20/2011] [Indexed: 11/11/2022]
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