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Toyen D, Wimolmala E, Hemvichian K, Lertsarawut P, Saenboonruang K. Highly Efficient and Eco-Friendly Thermal-Neutron-Shielding Materials Based on Recycled High-Density Polyethylene and Gadolinium Oxide Composites. Polymers (Basel) 2024; 16:1139. [PMID: 38675059 DOI: 10.3390/polym16081139] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/11/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024] Open
Abstract
Due to the increasing demands for improved radiation safety and the growing concerns regarding the excessive use of plastics, this work aimed to develop effective and eco-friendly thermal-neutron-shielding materials based on recycled high-density polyethylene (r-HDPE) composites containing varying surface-treated gadolinium oxide (Gd2O3) contents (0, 5, 10, 15, and 20 wt%). The results indicate that the overall thermal-neutron-shielding properties of the r-HDPE composites were enhanced with the addition of Gd2O3, as evidenced by large reductions in I/I0, HVL, and TVL, as well as the substantial increases in ∑t and ∑t/ρ of the composites. Furthermore, the results reveal that the values for tensile properties initially increased up to 5-15 wt% of Gd2O3 and then gradually decreased at higher contents. In addition, the results show that the addition of Gd2O3 particles generally increased the density (ρ), the remaining ash at 600 °C, and the degree of crystallinity (%XC) of the composites. This work also determined the effects of gamma irradiation on relevant properties of the composites. The findings indicate that following gamma aging, the tensile modulus slightly increased, while the tensile strength, elongation at break, and hardness (Shore D) showed no significant (p < 0.05) differences, except for the sample containing 5 wt% of Gd2O3, which exhibited a noticeable reduction in elongation at break. Furthermore, by comparing the neutron-shielding and mechanical properties of the developed r-HDPE composites with common borated polyethylene (PE) containing 5 wt% and 15 wt% of boron, the results clearly indicate the superior shielding and tensile properties in the r-HDPE composites, implying the great potential of r-HDPE composites to replace virgin plastics as effective and more eco-friendly shielding materials.
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Affiliation(s)
- Donruedee Toyen
- Department of Materials Science, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
- Special Research Unit of Radiation Technology for Advanced Materials (RTAM), Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
| | - Ekachai Wimolmala
- Polymer PROcessing and Flow (P-PROF) Research Group, Division of Materials Technology, School of Energy, Environment and Materials, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand
| | - Kasinee Hemvichian
- Nuclear Technology Research and Development Center, Thailand Institute of Nuclear Technology (Public Organization), Nakhon Nayok 26120, Thailand
| | - Pattra Lertsarawut
- Nuclear Technology Research and Development Center, Thailand Institute of Nuclear Technology (Public Organization), Nakhon Nayok 26120, Thailand
| | - Kiadtisak Saenboonruang
- Special Research Unit of Radiation Technology for Advanced Materials (RTAM), Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
- Department of Applied Radiation and Isotopes, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
- Specialized Center of Rubber and Polymer Materials in Agriculture and Industry (RPM), Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
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Neoh KB, Bong LJ, Silalahi CN, Panthawong A, Chareonviriyaphap T, Ahmad I. Life-history traits of Aedes aegypti (Linnaeus) distributed across a latitudinal range of 23 °N-6 °S. J Med Entomol 2024:tjae025. [PMID: 38408179 DOI: 10.1093/jme/tjae025] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/19/2024] [Accepted: 02/08/2024] [Indexed: 02/28/2024]
Abstract
The growth and associated traits of Aedes aegypti (L.) mosquitoes may adapt and evolve in response to the costs associated with body size in relation to latitudinal variation. We analyzed the life-history traits and energy reserves of field-collected mosquitoes from Taiwan, Thailand, and Indonesia along a latitudinal range spanning from 23°N to 6°S. A U-shaped relationship between body size and latitude was observed. Our study demonstrated the role of latitudinal temperature variations in determining the body size patterns of Ae. aegypti. Notably, the body size of the northern populations (from Taiwan) was significantly larger than those of the tropical populations from Thailand and Indonesia. Models have demonstrated that regional precipitation levels may contribute to body trait variations in certain high-latitude populations in Thailand. However, Indonesian populations have high development rates and large body sizes, indicating the involvement of other physiological traits in determining mosquito body size. The reproductive output of the adult females in this study was positively correlated with body size, but our measure of longevity did not covary significantly with the body size. By contrast, the reproductive output of mosquito-tested populations was in inverse proportion to longevity. Additionally, the mean teneral glycogen levels in the Indonesian and Thai populations were 2.5 times higher than those in the Taiwanese populations. The Indonesian and Thai populations had low mean generation and doubling times, resulting in a high intrinsic rate of increase compared with that of the Taiwanese populations, despite the Taiwanese populations having the highest net reproduction rate.
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Affiliation(s)
- Kok-Boon Neoh
- Department of Entomology, National Chung Hsing University, 402 Taichung, Taiwan
| | - Lee-Jin Bong
- Department of Entomology, National Chung Hsing University, 402 Taichung, Taiwan
| | | | - Amonrat Panthawong
- Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand
| | | | - Intan Ahmad
- School of Life Sciences and Technology, Institut Teknologi Bandung, Bandung, West Java 40132, Indonesia
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Prabsangob N, Hangsalad S, Udomrati S. Surface Modification of Okara Cellulose Crystals with Phenolic Acids to Prepare Multifunction Emulsifier with Antioxidant Capacity and Lipolysis Retardation Effect. Foods 2024; 13:184. [PMID: 38254485 PMCID: PMC10813991 DOI: 10.3390/foods13020184] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 12/28/2023] [Accepted: 01/03/2024] [Indexed: 01/24/2024] Open
Abstract
Emulsion-based foods are widely consumed, and their characteristics involving colloidal and oxidative stabilities should be considered. The fabrication of the interfaces by selecting the emulsifier may improve stability and trigger lipolysis, thereby reducing energy uptake from the emulsified food. The present work aimed to develop Okara cellulose crystals (OCs) as a multifunction emulsifier to preserve the physical and chemical stability of a Pickering emulsion via surface modification with phenolic acids. The modification of OC was performed by grafting with the selected phenolics to produce OC-gallic acid (OC-G) and OC-tannic acid (OC-T) complexes. There was a higher phenolic loading efficiency when the OC reacted with gallic acid (ca. 70%) than with tannic acid (ca. 50%). This trend was concomitant with better antioxidant activity of the OC-G than OC-T. Surface modification based on grafting with phenolic acids improved capability of the OC to enhance both the colloidal and oxidative stability of the emulsion. In addition, the cellulosic materials had a retardation effect on the in vitro lipolysis compared to a protein-stabilized emulsion. Surface modification by grafting with phenolic acids successfully provided OC as an innovative emulsifier to promote physico-chemical stability and lower lipolysis of the emulsion.
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Affiliation(s)
- Nopparat Prabsangob
- Department of Product Development, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand
| | - Sasithorn Hangsalad
- Department of Product Development, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand
| | - Sunsanee Udomrati
- Department of Food Chemistry and Physics, Institute of Food Research and Product Development, Kasetsart University, Bangkok 10900, Thailand
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Boonmak C, Kettongruang S, Buranathong B, Morikawa M, Duangmal K. Duckweed-associated bacteria as plant growth-promotor to enhance growth of Spirodela polyrhiza in wastewater effluent from a poultry farm. Arch Microbiol 2023; 206:43. [PMID: 38148332 DOI: 10.1007/s00203-023-03778-4] [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: 10/17/2023] [Revised: 11/26/2023] [Accepted: 11/27/2023] [Indexed: 12/28/2023]
Abstract
Duckweed has been highlighted as an invaluable resource because of its abilities to remove nitrogen and phosphorus from wastewater coupling with the production of high starch/protein-containing plant biomass. Duckweed recruits microbes and particularly forms a stable "core" bacterial microbiota, which greatly reduces the colonization efficiency of plant growth-promoting bacteria (PGPB). In this study, natural duckweeds were enriched in a sterilized-partially treated wastewater effluent from a poultry farm. After 24 days of cultivation, the duckweed-associated bacteria (DAB) were isolated and evaluated for their plant growth-promoting (PGP) potentials by co-cultivation with axenic Spirodela polyrhiza. Ten species were found in more than one location and could be considered candidates for the stable "core" DAB. Among them, all isolates of Acinetobacter soli, Acidovorax kalamii, Brevundimonas vesicularis, Pseudomonas toyotomiensis, and Shinella curvata increased duckweed growth in Hoagland medium. The highest PGP ability was observed in Sh. curvata W12-8 (with EPG value of 208.72%), followed by Paracoccus marcusii W7-16 (171.31%), Novosphingobium subterraneum W5-13 (156.96%), and Ac. kalamii W7-18 (156.96%). However, the highest growth promotion in the wastewater was observed when co-cultured with W7-16, which was able to increase biomass dry weight and root length of duckweed by 3.17 and 2.26 folds, respectively.
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Affiliation(s)
- Chanita Boonmak
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand.
- Biodiversity Center Kasetsart University (BDCKU), Kasetsart University, Bangkok, 10900, Thailand.
- Duckweed Holobiont Resource and Research Center (DHbRC), Kasetsart University, Bangkok, 10900, Thailand.
| | - Sirapat Kettongruang
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand
| | - Buranaporn Buranathong
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand
| | - Masaaki Morikawa
- Graduate School of Environmental Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Kannika Duangmal
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand
- Biodiversity Center Kasetsart University (BDCKU), Kasetsart University, Bangkok, 10900, Thailand
- Duckweed Holobiont Resource and Research Center (DHbRC), Kasetsart University, Bangkok, 10900, Thailand
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Chawla M, Cuspoca AF, Akthar N, Magdaleno JSL, Rattanabunyong S, Suwattanasophon C, Jongkon N, Choowongkomon K, Shaikh AR, Malik T, Cavallo L. Immunoinformatics-aided rational design of a multi-epitope vaccine targeting feline infectious peritonitis virus. Front Vet Sci 2023; 10:1280273. [PMID: 38192725 PMCID: PMC10773687 DOI: 10.3389/fvets.2023.1280273] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Accepted: 11/27/2023] [Indexed: 01/10/2024] Open
Abstract
Feline infectious peritonitis (FIP) is a grave and frequently lethal ailment instigated by feline coronavirus (FCoV) in wild and domestic feline species. The spike (S) protein of FCoV assumes a critical function in viral ingress and infection, thereby presenting a promising avenue for the development of a vaccine. In this investigation, an immunoinformatics approach was employed to ascertain immunogenic epitopes within the S-protein of FIP and formulate an innovative vaccine candidate. By subjecting the amino acid sequence of the FIP S-protein to computational scrutiny, MHC-I binding T-cell epitopes were predicted, which were subsequently evaluated for their antigenicity, toxicity, and allergenicity through in silico tools. Our analyses yielded the identification of 11 potential epitopes capable of provoking a robust immune response against FIPV. Additionally, molecular docking analysis demonstrated the ability of these epitopes to bind with feline MHC class I molecules. Through the utilization of suitable linkers, these epitopes, along with adjuvants, were integrated to design a multi-epitope vaccine candidate. Furthermore, the stability of the interaction between the vaccine candidate and feline Toll-like receptor 4 (TLR4) was established via molecular docking and molecular dynamics simulation analyses. This suggests good prospects for future experimental validation to ascertain the efficacy of our vaccine candidate in inducing a protective immune response against FIP.
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Affiliation(s)
- Mohit Chawla
- Physical Sciences and Engineering Division, Kaust Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Andrés Felipe Cuspoca
- Grupo de Investigación en Epidemiología Clínica de Colombia (GRECO), Universidad Pedagógica yTecnológica de Colombia, Tunja, Colombia
- Centro de Atención e Investigación Médica–CAIMED, Chía, Colombia
| | - Nahid Akthar
- Department of Research and Innovation, STEMskills Research and Education Lab Private Limited, Faridabad, Haryana, India
| | - Jorge Samuel Leon Magdaleno
- Physical Sciences and Engineering Division, Kaust Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | | | | | - Nathjanan Jongkon
- Department of Social and Applied Science, College of Industrial Technology, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand
| | | | - Abdul Rajjak Shaikh
- Department of Research and Innovation, STEMskills Research and Education Lab Private Limited, Faridabad, Haryana, India
| | - Tabarak Malik
- Department of Biomedical Sciences, Institute of Health, Jimma University, Jimma, Ethiopia
| | - Luigi Cavallo
- Physical Sciences and Engineering Division, Kaust Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
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Anuntasomboon P, Siripattanapipong S, Unajak S, Choowongkomon K, Burchmore R, Leelayoova S, Mungthin M, E-Kobon T. Identification of a unique conserved region from a kinetoplastid genome of Leishmania orientalis (formerly named Leishmania siamensis) strain PCM2 in Thailand. Sci Rep 2023; 13:19644. [PMID: 37950023 PMCID: PMC10638283 DOI: 10.1038/s41598-023-46638-3] [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: 02/27/2023] [Accepted: 11/03/2023] [Indexed: 11/12/2023] Open
Abstract
Mitochondrial DNAs (mtDNAs) appear in almost all eukaryotic species and are useful molecular markers for phylogenetic studies and species identification. Kinetoplast DNAs (kDNAs) are structurally complex circular mtDNA networks in kinetoplastids, divided into maxicircles and minicircles. Despite several kDNAs of many Leishmania species being examined, the kDNAs of the new species, Leishmania orientalis (formerly named Leishmania siamensis) strain PCM2, have not been explored. This study aimed to investigate the maxicircle and minicircle DNAs of L. orientalis strain PCM2 using hybrid genome sequencing technologies and bioinformatic analyses. The kDNA sequences were isolated and assembled using the SPAdes hybrid assembler from the Illumina short-read and PacBio long-read data. Circular contigs of the maxicircle and minicircle DNAs were reconstructed and confirmed by BLASTn and rKOMICs programs. The kDNA genome was annotated by BLASTn before the genome comparison and phylogenetic analysis by progressiveMauve, MAFFT, and MEGA programs. The maxicircle of L. orientalis strain PCM2 (18,215 bp) showed 99.92% similarity and gene arrangement to Leishmania enriettii strain LEM3045 maxicircle with variation in the 12s rRNA gene and divergent region. Phylogenetics of the whole sequence, coding regions, divergent regions, and 12s rRNA gene also confirmed this relationship and subgenera separation. The identified 105 classes of minicircles (402-1177 bp) were clustered monophyletically and related to the Leishmania donovani minicircles. The kinetoplast maxicircle and minicircle DNAs of L. orientalis strain PCM2 contained a unique conserved region potentially useful for specific diagnosis of L. orientalis and further exploration of this parasite population genetics in Thailand and related regions.
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Affiliation(s)
- Pornchai Anuntasomboon
- Department of Genetics, Faculty of Science, Kasetsart University, Bangkok, Thailand
- Omics Center for Agriculture, Bioresources, Food, and Health, Kasetsart University (OmiKU), Bangkok, Thailand
| | | | - Sasimanas Unajak
- Department of Biochemistry, Faculty of Science, Kasetsart University, Bangkok, Thailand
| | | | - Richard Burchmore
- Glasgow Polyomics, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Saovanee Leelayoova
- Department of Parasitology, Phramongkutklao College of Medicine, Bangkok, Thailand
| | - Mathirut Mungthin
- Department of Parasitology, Phramongkutklao College of Medicine, Bangkok, Thailand
| | - Teerasak E-Kobon
- Department of Genetics, Faculty of Science, Kasetsart University, Bangkok, Thailand.
- Omics Center for Agriculture, Bioresources, Food, and Health, Kasetsart University (OmiKU), Bangkok, Thailand.
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Sukkanon C, Suwonkerd W, Thanispong K, Saeung M, Jhaiaun P, Pimnon S, Thongkhao K, Manguin S, Chareonviriyaphap T. Distribution of mosquitoes (Diptera: Culicidae) in Thailand: a dataset. GigaByte 2023; 2023:gigabyte90. [PMID: 37711279 PMCID: PMC10498097 DOI: 10.46471/gigabyte.90] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 08/30/2023] [Indexed: 09/16/2023] Open
Abstract
Mosquitoes play a crucial role as primary vectors for various infectious diseases in Thailand. Therefore, accurate distribution information is vital for effectively combating and better controlling mosquito-borne diseases. Here, we present a curated dataset of the mosquito distribution in Thailand comprising 12,278 records of at least 117 mosquito species (Diptera: Culicidae). The main genera included in the dataset are Aedes, Anopheles, Armigeres, Culex, and Mansonia. From 2007 to 2023, data were collected through routine mosquito surveillance and research projects from 1,725 locations across 66 (out of 77) Thai provinces. The majority of the data were extracted from a Thai database of the Thailand Malaria Elimination Program. To facilitate broader access to mosquito-related data and support further exploration of the Thai mosquito fauna, the data were translated into English. Our dataset has been published in the Global Biodiversity Information Facility, making it available for researchers worldwide.
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Affiliation(s)
- Chutipong Sukkanon
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat, 80160, Thailand
| | - Wannapa Suwonkerd
- Division of Vector Borne Diseases, Department of Disease Control, Ministry of Public Health, Nonthaburi, 11000, Thailand
| | - Kanutcharee Thanispong
- Division of Vector Borne Diseases, Department of Disease Control, Ministry of Public Health, Nonthaburi, 11000, Thailand
| | - Manop Saeung
- Faculty of Agriculture, Kasetsart University, 10900, Bangkok, Thailand
| | | | - Suntorn Pimnon
- Faculty of Agriculture, Kasetsart University, 10900, Bangkok, Thailand
| | - Kanaphot Thongkhao
- Office of Disease Prevention and Control Region 11, Nakhon Si Thammarat, Thailand
| | - Sylvie Manguin
- HSM, University of Montpellier, CNRS, IRD, 34093, Montpellier, France
| | - Theeraphap Chareonviriyaphap
- Faculty of Agriculture, Kasetsart University, 10900, Bangkok, Thailand
- Royal Society of Thailand, 10300, Bangkok, Thailand
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Kasemsumran S, Boondaeng A, Jungtheerapanich S, Ngowsuwan K, Apiwatanapiwat W, Janchai P, Vaithanomsat P. Assessing Fermentation Broth Quality of Pineapple Vinegar Production with a Near-Infrared Fiber-Optic Probe Coupled with Stability Competitive Adaptive Reweighted Sampling. Molecules 2023; 28:6239. [PMID: 37687066 PMCID: PMC10488555 DOI: 10.3390/molecules28176239] [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: 07/30/2023] [Revised: 08/21/2023] [Accepted: 08/23/2023] [Indexed: 09/10/2023] Open
Abstract
In this study, the performance of a near-infrared (NIR) fiber-optic probe coupled with stability competitive adaptive reweighted sampling (SCARS) was investigated for the analysis of acetic acid, ethanol, total soluble solids, caffeic acid, gallic acid, and tannic acid in the broth of pineapple vinegar during fermentation. The NIR spectra of the broth samples in the region of 11,536-3956 cm-1 were collected during vinegar fermentation promoted by Acetobacter aceti. This continuous biological process led to changes in the concentrations of all analytes studied. SCARS provided optimized and stabilized NIR spectral variables for the construction of a partial least squares (PLS) model for each analyte using a small number of optimal variables (under 88 variables). The SCARS-PLS model outperformed the conventional PLS model, and achieved excellent accuracy in accordance with ISO 12099:2017 for the four prediction models of acetic acid, ethanol, caffeic acid, and gallic acid, with root-mean-square error of prediction values of 0.137%, 0.178%, 0.637 μg/mL and 0.640 μg/mL, respectively. In contrast, only an acetic acid content prediction model constructed via the conventional PLS method and using the whole spectral region (949 variables) could pass with acceptable accuracy. These results indicate that the NIR optical probe coupled with SCARS is an appropriate method for the continuous monitoring of multianalytes during vinegar fermentation, particularly acetic acid and ethanol contents, which are indicators of the finished fermentation of pineapple vinegar.
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Affiliation(s)
- Sumaporn Kasemsumran
- Laboratory of Non-Destructive Quality Evaluation of Commodities, Kasetsart Agricultural and Agro-Industrial Product Improvement Institute (KAPI), Kasetsart University, Bangkok 10900, Thailand; (S.J.); (K.N.)
| | - Antika Boondaeng
- Laboratory of Enzyme and Microbiology, KAPI, Kasetsart University, Bangkok 10900, Thailand; (A.B.); (W.A.); (P.J.); (P.V.)
| | - Sunee Jungtheerapanich
- Laboratory of Non-Destructive Quality Evaluation of Commodities, Kasetsart Agricultural and Agro-Industrial Product Improvement Institute (KAPI), Kasetsart University, Bangkok 10900, Thailand; (S.J.); (K.N.)
| | - Kraireuk Ngowsuwan
- Laboratory of Non-Destructive Quality Evaluation of Commodities, Kasetsart Agricultural and Agro-Industrial Product Improvement Institute (KAPI), Kasetsart University, Bangkok 10900, Thailand; (S.J.); (K.N.)
| | - Waraporn Apiwatanapiwat
- Laboratory of Enzyme and Microbiology, KAPI, Kasetsart University, Bangkok 10900, Thailand; (A.B.); (W.A.); (P.J.); (P.V.)
| | - Phornphimon Janchai
- Laboratory of Enzyme and Microbiology, KAPI, Kasetsart University, Bangkok 10900, Thailand; (A.B.); (W.A.); (P.J.); (P.V.)
| | - Pilanee Vaithanomsat
- Laboratory of Enzyme and Microbiology, KAPI, Kasetsart University, Bangkok 10900, Thailand; (A.B.); (W.A.); (P.J.); (P.V.)
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Toyen D, Wimolmala E, Saenboonruang K. Multi-Layered Composites of Natural Rubber (NR) and Bismuth Oxide (Bi 2O 3) with Enhanced X-ray Shielding and Mechanical Properties. Polymers (Basel) 2023; 15:2717. [PMID: 37376362 DOI: 10.3390/polym15122717] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/09/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023] Open
Abstract
Due to rapid increases in the utilization of radiation and nuclear technologies, effective and suitable radiation-shielding materials have become one of the most sought-after options to protect users and the public from excessive exposure to the radiation. However, most radiation-shielding materials have greatly reduced mechanical properties after the addition of fillers, resulting in their limited useability and shortened lifetime. Therefore, this work aimed to alleviate such drawbacks/limitations by exploring a possible method to simultaneously enhance both the X-ray shielding and mechanical properties of bismuth oxide (Bi2O3)/natural rubber (NR) composites through multi-layered structures, with varying (1-5) layers and a total combined thickness of 10 mm. To correctly determine the effects of the multi-layered structures on the properties of NR composites, the formulation and layer configuration for all multi-layered samples were tailored such that their theoretical X-ray shielding properties were equal to those of a single-layered sample that contained 200 phr Bi2O3. The results indicated that the multi-layered Bi2O3/NR composites with neat NR sheets on both outer layers (sample-D, sample-F, sample-H, and sample-I) had noticeably higher tensile strength and elongation at break than those of the other designs. Furthermore, all multi-layered samples (sample-B to sample-I), regardless of the layer structure, had enhanced X-ray shielding properties compared to those with a single layer (sample-A), as shown by their higher values of the linear attenuation coefficient (µ) and lead equivalence (Pbeq) and the lower value of the half-value layer (HVL) in the former. This work also determined the effects of thermal aging on relevant properties for all samples, with the results revealing that all the thermal-aged composites had higher values for the tensile modulus but lower values for the swelling percentage, tensile strength, and elongation at break, compared with the non-aged composites. Hence, based on the overall outcomes from this work, it could be concluded that the worrisome decreases in mechanical properties of the common single-layered NR composites after the addition of Bi2O3 could be prevented/reduced by introducing appropriate multi-layered structures, which would not only widen potential applications but also prolong the lifetime of the composites.
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Affiliation(s)
- Donruedee Toyen
- Department of Materials Science, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
- Special Research Unit of Radiation Technology for Advanced Materials (RTAM), Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
| | - Ekachai Wimolmala
- Polymer PROcessing and Flow (P-PROF) Research Group, Division of Materials Technology, School of Energy, Environment and Materials, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand
| | - Kiadtisak Saenboonruang
- Special Research Unit of Radiation Technology for Advanced Materials (RTAM), Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
- Department of Applied Radiation and Isotopes, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
- Specialized Center of Rubber and Polymer Materials in Agriculture and Industry (RPM), Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
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Thumwong A, Darachai J, Thamrongsiripak N, Tokonami S, Ishikawa T, Saenboonruang K. Fruit Peel Powder as Natural Antioxidant and Reinforcing Bio-Filler in Natural Rubber Latex Gloves: Cases of Mangosteen, Pomelo and Durian. Antioxidants (Basel) 2023; 12:antiox12051119. [PMID: 37237986 DOI: 10.3390/antiox12051119] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/04/2023] [Accepted: 05/15/2023] [Indexed: 05/28/2023] Open
Abstract
As the world is facing rapid increases in agricultural wastes that greatly affect global health, the environment, and economies, this work aims to alleviate such issues by introducing simple uses of waste fruit peel powder (FPP) derived from mangosteen (MPP), pomelo (PPP), or durian (DPP), as dual natural antioxidants and reinforcing bio-fillers in natural rubber latex (NRL) gloves. A thorough investigation was undertaken of the relevant characteristics for both FPP (morphological, functional groups, particle sizes, and thermals stability) and NRL gloves (morphological, functional groups, density, color, thermal stability, and mechanical properties-both before and after thermal/25 kGy gamma aging). The results indicated that the initial addition (2-4 parts per hundred parts of rubber by weight; phr) of FPP to NRL composites generally enhanced the strength and elongation at the break of the specimens, with the levels of the improvement varying depending on the type and content of FPPs. In addition to the reinforcing effects, the FPP also offered natural antioxidant properties, evidenced by higher values of aging coefficients for all FPP/NRL gloves under either thermal or 25 kGy gamma aging than those of pristine NRL. Furthermore, by comparing the tensile strength and elongation at break of the developed FPP/NRL gloves with the requirements for medical examination latex gloves according to ASTM D3578-05, the recommended FPP contents for actual glove production were 2-4 phr for MPP, 4 phr for PPP, and 2 phr for DPP. Consequently, based on the overall outcomes, the FPPs of interest showed promising potential for utilization as simultaneous natural antioxidants and reinforcing bio-fillers in NRL gloves, which would not only enhance the strength and ability of the gloves to resist oxidative degradation from heat and gamma irradiation but also increase their economical value as well as reducing the amounts of the investigated wastes.
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Affiliation(s)
- Arkarapol Thumwong
- Department of Materials Science, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
- Special Research Unit of Radiation Technology for Advanced Materials (RTAM), Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
| | - Jitsuna Darachai
- Special Research Unit of Radiation Technology for Advanced Materials (RTAM), Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
| | | | - Shinji Tokonami
- Institute of Radiation Emergency Medicine, Hirosaki University, Aomori 0368564, Japan
| | - Tetsuo Ishikawa
- Department of Radiation Physics and Chemistry, Fukushima Medical University, Fukushima 9601295, Japan
| | - Kiadtisak Saenboonruang
- Special Research Unit of Radiation Technology for Advanced Materials (RTAM), Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
- Department of Applied Radiation and Isotopes, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
- Kasetsart University Research and Development Institute, Kasetsart University, Bangkok 10900, Thailand
- Specialized Center of Rubber and Polymer Materials in Agriculture and Industry (RPM), Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
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Wannitikul P, Wattana-Amorn P, Sathitnaitham S, Sakulkoo J, Suttangkakul A, Wonnapinij P, Bassel GW, Simister R, Gomez LD, Vuttipongchaikij S. Disruption of a DUF247 Containing Protein Alters Cell Wall Polysaccharides and Reduces Growth in Arabidopsis. Plants (Basel) 2023; 12:1977. [PMID: 37653894 PMCID: PMC10221614 DOI: 10.3390/plants12101977] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/09/2023] [Accepted: 05/10/2023] [Indexed: 09/02/2023]
Abstract
Plant cell wall biosynthesis is a complex process that requires proteins and enzymes from glycan synthesis to wall assembly. We show that disruption of At3g50120 (DUF247-1), a member of the DUF247 multigene family containing 28 genes in Arabidopsis, results in alterations to the structure and composition of cell wall polysaccharides and reduced growth and plant size. An ELISA using cell wall antibodies shows that the mutants also exhibit ~50% reductions in xyloglucan (XyG), glucuronoxylan (GX) and heteromannan (HM) epitopes in the NaOH fraction and ~50% increases in homogalacturonan (HG) epitopes in the CDTA fraction. Furthermore, the polymer sizes of XyGs and GXs are reduced with concomitant increases in short-chain polymers, while those of HGs and mHGs are slightly increased. Complementation using 35S:DUF247-1 partially recovers the XyG and HG content, but not those of GX and HM, suggesting that DUF247-1 is more closely associated with XyGs and HGs. DUF247-1 is expressed throughout Arabidopsis, particularly in vascular and developing tissues, and its disruption affects the expression of other gene members, indicating a regulatory control role within the gene family. Our results demonstrate that DUF247-1 is required for normal cell wall composition and structure and Arabidopsis growth.
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Affiliation(s)
- Pitchaporn Wannitikul
- Department of Genetics, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand; (P.W.); (S.S.); (J.S.); (A.S.); (P.W.)
| | - Pakorn Wattana-Amorn
- Special Research Unit for Advanced Magnetic Resonance and Center of Excellence for Innovation in Chemistry, Department of Chemistry, Faculty of Science, Kasetsart University, Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand;
| | - Sukhita Sathitnaitham
- Department of Genetics, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand; (P.W.); (S.S.); (J.S.); (A.S.); (P.W.)
| | - Jenjira Sakulkoo
- Department of Genetics, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand; (P.W.); (S.S.); (J.S.); (A.S.); (P.W.)
| | - Anongpat Suttangkakul
- Department of Genetics, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand; (P.W.); (S.S.); (J.S.); (A.S.); (P.W.)
- Center of Advanced studies for Tropical Natural Resources, Kasetsart University, Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand
| | - Passorn Wonnapinij
- Department of Genetics, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand; (P.W.); (S.S.); (J.S.); (A.S.); (P.W.)
- Center of Advanced studies for Tropical Natural Resources, Kasetsart University, Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand
- Omics Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Bangkok 10900, Thailand
| | - George W. Bassel
- School of Life Sciences, The University of Warwick, Coventry CV4 7AL, UK;
| | - Rachael Simister
- CNAP, Department of Biology, University of York, Heslington, York YO10 5DD, UK; (R.S.); (L.D.G.)
| | - Leonardo D. Gomez
- CNAP, Department of Biology, University of York, Heslington, York YO10 5DD, UK; (R.S.); (L.D.G.)
| | - Supachai Vuttipongchaikij
- Department of Genetics, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand; (P.W.); (S.S.); (J.S.); (A.S.); (P.W.)
- Center of Advanced studies for Tropical Natural Resources, Kasetsart University, Ngam Wong Wan Road, Chattuchak, Bangkok 10900, Thailand
- Omics Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Bangkok 10900, Thailand
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12
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Krobthong S, Rungsawang T, Wongrerkdee S. Comparison of ZnO Nanoparticles Prepared by Precipitation and Combustion for UV and Sunlight-Driven Photocatalytic Degradation of Methylene Blue. Toxics 2023; 11:toxics11030266. [PMID: 36977031 PMCID: PMC10053102 DOI: 10.3390/toxics11030266] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/07/2023] [Accepted: 03/12/2023] [Indexed: 05/27/2023]
Abstract
ZnO nanoparticles (NPs) were comparatively synthesized via precipitation and combustion techniques. The ZnO NPs synthesized via precipitation and combustion exhibited similar polycrystalline hexagonal wurtzite structures. The large crystal sizes of ZnO NPs were obtained from the ZnO precipitation in comparison with those from the ZnO combustion, while the particle sizes were in the same range. The functional analysis implied that the ZnO structures had surface defects. Moreover, absorbance measurement showed the same absorbance range in ultraviolet light. In the photocatalytic degradation of methylene blue, ZnO precipitation exhibited higher degradation performance than ZnO combustion. This was attributed to the larger crystal sizes of ZnO NPs, which provided an enduring carrier movement at semiconductor surfaces and reduced electron-hole recombination. Thus, the crystallinity of ZnO NPs can be considered an important factor in photocatalytic activity. Furthermore, precipitation is an interesting synthesizing method for preparing ZnO NPs with large crystal sizes.
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Kruasuwan W, Lohmaneeratana K, Munnoch JT, Vongsangnak W, Jantrasuriyarat C, Hoskisson PA, Thamchaipenet A. Transcriptome Landscapes of Salt-Susceptible Rice Cultivar IR29 Associated with a Plant Growth Promoting Endophytic Streptomyces. Rice (N Y) 2023; 16:6. [PMID: 36739313 PMCID: PMC9899303 DOI: 10.1186/s12284-023-00622-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
Plant growth-promoting endophytic (PGPE) actinomycetes have been known to enhance plant growth and mitigate plant from abiotic stresses via their PGP-traits. In this study, PGPE Streptomyces sp. GKU 895 promoted growth and alleviated salt tolerance of salt-susceptible rice cultivar IR29 by augmentation of plant weight and declined ROS after irrigation with 150 mM NaCl in a pot experiment. Transcriptome analysis of IR29 exposed to the combination of strain GKU 895 and salinity demonstrated up and downregulated differentially expressed genes (DEGs) classified by gene ontology and plant reactome. Streptomyces sp. GKU 895 induced changes in expression of rice genes including transcription factors under salt treatment which involved in growth and development, photosynthesis, plant hormones, ROS scavenging, ion transport and homeostasis, and plant-microbe interactions regarding pathogenesis- and symbiosis-related proteins. Taken together, these data demonstrate that PGPE Streptomyces sp. GKU 895 colonized and enhanced growth of rice IR29 and triggered salt tolerance phenotype. Our findings suggest that utilisation of beneficial endophytes in the saline fields could allow for the use of such marginal soils for growing rice and possibly other crops.
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Affiliation(s)
- Worarat Kruasuwan
- Department of Genetics, Faculty of Sciences, Kasetsart University, Bangkok, Thailand
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
- Siriraj Long-Read Lab (Si-LoL), Division of Medical Bioinformatics, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Karan Lohmaneeratana
- Department of Genetics, Faculty of Sciences, Kasetsart University, Bangkok, Thailand
| | - John T Munnoch
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
| | - Wanwipa Vongsangnak
- Department of Zoology, Faculty of Sciences, Kasetsart University, Bangkok, Thailand
- Omics Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Bangkok, Thailand
| | | | - Paul A Hoskisson
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
| | - Arinthip Thamchaipenet
- Department of Genetics, Faculty of Sciences, Kasetsart University, Bangkok, Thailand.
- Omics Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Bangkok, Thailand.
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Sapsirisuk S, Polburee P, Lorliam W, Limtong S. Discovery of Oleaginous Yeast from Mountain Forest Soil in Thailand. J Fungi (Basel) 2022; 8:1100. [PMID: 36294665 PMCID: PMC9605381 DOI: 10.3390/jof8101100] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 10/14/2022] [Accepted: 10/15/2022] [Indexed: 11/04/2023] Open
Abstract
As an interesting alternative microbial platform for the sustainable synthesis of oleochemical building blocks and biofuels, oleaginous yeasts are increasing in both quantity and diversity. In this study, oleaginous yeast species from northern Thailand were discovered to add to the topology. A total of 127 yeast strains were isolated from 22 forest soil samples collected from mountainous areas. They were identified by an analysis of the D1/D2 domain of the large subunit rRNA (LSU rRNA) gene sequences to be 13 species. The most frequently isolated species were Lipomyces tetrasporus and Lipomyces starkeyi. Based on the cellular lipid content determination, 78 strains of ten yeast species, and two potential new yeast that which accumulated over 20% of dry biomass, were found to be oleaginous yeast strains. Among the oleaginous species detected, Papiliotrema terrestris and Papiliotrema flavescens have never been reported as oleaginous yeast before. In addition, none of the species in the genera Piskurozyma and Hannaella were found to be oleaginous yeast. L. tetrasporus SWU-NGP 2-5 accumulated the highest lipid content of 74.26% dry biomass, whereas Lipomyces mesembrius SWU-NGP 14-6 revealed the highest lipid quantity at 5.20 ± 0.03 g L-1. The fatty acid profiles of the selected oleaginous yeasts varied depending on the strain and suitability for biodiesel production.
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Affiliation(s)
- Sirawich Sapsirisuk
- Department of Microbiology, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand
| | - Pirapan Polburee
- Department of Microbiology, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand
| | - Wanlapa Lorliam
- Department of Microbiology, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand
| | - Savitree Limtong
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
- Biodiversity Center, Kasetsart University, Bangkok 10900, Thailand
- Academy of Science, The Royal Society of Thailand, Bangkok 10300, Thailand
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15
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Leeprasert L, Chonudomkul D, Boonmak C. Biocalcifying Potential of Ureolytic Bacteria Isolated from Soil for Biocementation and Material Crack Repair. Microorganisms 2022; 10:963. [PMID: 35630407 PMCID: PMC9143465 DOI: 10.3390/microorganisms10050963] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 04/30/2022] [Accepted: 05/01/2022] [Indexed: 02/04/2023] Open
Abstract
Microbially induced calcium carbonate precipitation (MICP) has been highlighted for its application in civil engineering, and in the environmental and geotechnical fields. Ureolytic activity is one of the most promising bacterial mechanisms in terms of inducing calcium carbonate formation. In this study, four bacterial isolates with high-yield urease production capabilities were obtained from two-step screening using a high-buffered urea medium. The highest urease activity and calcium carbonate formation was observed in Lysinibacillus fusiformis 5.1 with 4.40 × 103 unit/L of urease and 24.15 mg/mL of calcium carbonate, followed by Lysinibacillus xylanilyticus 4.3 with 3.93 × 103 unit/L of urease and 22.85 mg/mL of calcium carbonate. The microstructure of the precipitated crystalline calcium carbonate was observed using scanning electron microscopy. X-ray diffraction analysis confirmed that the main polymorph of the calcium carbonate particle obtained from both isolates was calcite. Examination of the material-crack filling in mortar specimens showed that calcite layers had formed along the crack edges and inside after 10 days, and gradually filled the cracks up to the upper surface. These results showed that these two isolates presented robust characteristics of potential MICP-inducing bacteria for civil engineering and material engineering applications.
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Affiliation(s)
- Laxmi Leeprasert
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand; (L.L.); (D.C.)
| | - Duenrut Chonudomkul
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand; (L.L.); (D.C.)
- Biodiversity Center Kasetsart University (BDCKU), Bangkok 10900, Thailand
| | - Chanita Boonmak
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand; (L.L.); (D.C.)
- Biodiversity Center Kasetsart University (BDCKU), Bangkok 10900, Thailand
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16
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Chaloeipote G, Samarnwong J, Traiwatcharanon P, Kerdcharoen T, Wongchoosuk C. High-performance resistive humidity sensor based on Ag nanoparticles decorated with graphene quantum dots. R Soc Open Sci 2021; 8:210407. [PMID: 34295526 PMCID: PMC8292773 DOI: 10.1098/rsos.210407] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 06/01/2021] [Indexed: 05/09/2023]
Abstract
In this work, we present a low-cost, fast and simple fabrication of resistive-type humidity sensors based on the graphene quantum dots (GQDs) and silver nanoparticles (AgNPs) nanocomposites. The GQDs and AgNPs were synthesized by hydrothermal method and green reducing agent route, respectively. UV-Vis spectrophotometer, X-ray photoelectron spectroscopy and field-emission transmission electron microscopy were used to characterize quality, chemical bonding states and morphology of the nanocomposite materials and confirm the successful formation of core/shell-like AgNPs/GQDs structure. According to sensing humidity results, the ratio of GQDs/AgNPs 1 : 1 nanocomposite exhibits the best humidity response of 98.14% with exponential relation in the humidity range of 25-95% relative humidity at room temperature as well as faster response/recovery times than commercial one at the same condition. The sensing mechanism of the high-performance GQDs/AgNPs humidity sensor is proposed via Schottky junction formation and intrinsic synergistic effects of GQDs and AgNPs.
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Affiliation(s)
- Gun Chaloeipote
- Department of Physics, Faculty of Science, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
| | - Jaruwan Samarnwong
- Department of Physics, Faculty of Science, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
| | | | - Teerakiat Kerdcharoen
- Department of Physics, Faculty of Science, Mahidol University and Research Network of NANOTEC at Mahidol University, National Nanotechnology Center, Bangkok 10400, Thailand
| | - Chatchawal Wongchoosuk
- Department of Physics, Faculty of Science, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
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Lapbenjakul S, Thapana W, Twilprawat P, Muangmai N, Kanchanaketu T, Temsiripong Y, Unajak S, Peyachoknagul S, Srikulnath K. High genetic diversity and demographic history of captive Siamese and Saltwater crocodiles suggest the first step toward the establishment of a breeding and reintroduction program in Thailand. PLoS One 2017; 12:e0184526. [PMID: 28953895 PMCID: PMC5617146 DOI: 10.1371/journal.pone.0184526] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 08/25/2017] [Indexed: 01/08/2023] Open
Abstract
The Siamese crocodile (Crocodylus siamensis) and Saltwater crocodile (C. porosus) are two of the most endangered animals in Thailand. Their numbers have been reduced severely by hunting and habitat fragmentation. A reintroduction plan involving captive-bred populations that are used commercially is important and necessary as a conservation strategy to aid in the recovery of wild populations. Here, the genetic diversity and population structure of 69 individual crocodiles, mostly members of captive populations, were analyzed using both mitochondrial D-loop DNA and microsatellite markers. The overall haplotype diversity was 0.924–0.971 and the mean expected heterozygosity across 22 microsatellite loci was 0.578–0.701 for the two species. This agreed with the star-like shaped topology of the haplotype network, which suggests a high level of genetic diversity. The mean ratio of the number of alleles to the allelic range (M ratio) for the populations of both species was considerably lower than the threshold of 0.68, which was interpreted as indicative of a historical genetic bottleneck. Microsatellite markers provided evidence of introgression for three individual crocodiles, which suggest that hybridization might have occurred between C. siamensis and C. porosus. D-loop sequence analysis detected bi-directional hybridization between male and female individuals of the parent species. Therefore, identification of genetically non-hybrid and hybrid individuals is important for long-term conservation management. Relatedness values were low within the captive populations, which supported their genetic integrity and the viability of a breeding and reintroduction management plan. This work constitutes the first step in establishing an appropriate source population from a scientifically managed perspective for an in situ/ex situ conservation program and reintroduction of crocodile individuals to the wild in Thailand.
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Grants
- Kasetsart University Research and Development Institute (KURDI)
- the Graduate School, Kasetsart University
- Professor Motivation (PM), Faculty of Science, Kasetsart University
- Special Track Staff (STS), Faculty of Science, Kasetsart University
- Science Research Fund (ScRF), Faculty of Science, Kasetsart University
- the Center for Advanced Studies in Tropical Natural Resources, National Research University-Kasetsart University
- The graduate scholarship provided by the National Research Council of Thailand (NRCT) as of fiscal year 2017, the Graduate School, Kasetsart University
- the Science Achievement Scholarship of Thailand (SAST), the Office of the Higher Education Commission, Thailand
- the Center of Excellence on Agricultural Biotechnology, Science and Technology Postgraduate Education and Research Development Office, Office of Higher Education Commission, Ministry of Education
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Affiliation(s)
- Sorravis Lapbenjakul
- Laboratory of Animal Cytogenetics and Comparative Genomics (ACCG), Department of Genetics, Faculty of Science, Kasetsart University, Chatuchak, Bangkok, Thailand
- Animal Breeding and Genetics Consortium of Kasetsart University (ABG-KU), Kasetsart University, Bangkok, Thailand
| | - Watcharaporn Thapana
- Laboratory of Animal Cytogenetics and Comparative Genomics (ACCG), Department of Genetics, Faculty of Science, Kasetsart University, Chatuchak, Bangkok, Thailand
- Animal Breeding and Genetics Consortium of Kasetsart University (ABG-KU), Kasetsart University, Bangkok, Thailand
- Center for Advanced Studies in Tropical Natural Resources, National Research University-Kasetsart University (CASTNAR, NRU-KU), Kasetsart University, Bangkok, Thailand
| | - Panupon Twilprawat
- Laboratory of Animal Cytogenetics and Comparative Genomics (ACCG), Department of Genetics, Faculty of Science, Kasetsart University, Chatuchak, Bangkok, Thailand
| | - Narongrit Muangmai
- Animal Breeding and Genetics Consortium of Kasetsart University (ABG-KU), Kasetsart University, Bangkok, Thailand
- Department of Fishery Biology, Faculty of Fisheries, Kasetsart University, Bangkok, Thailand
| | - Thiti Kanchanaketu
- Division of Genetics, Department of Science, Faculty of Liberal Arts and Science, Kasetsart University (Kamphaeng Saen Campus), Kamphaeng Saen, Nakhon Pathom, Thailand
| | | | - Sasimanas Unajak
- Department of Biochemistry, Faculty of Science, Kasetsart University, Bangkok, Thailand
| | - Surin Peyachoknagul
- Laboratory of Animal Cytogenetics and Comparative Genomics (ACCG), Department of Genetics, Faculty of Science, Kasetsart University, Chatuchak, Bangkok, Thailand
- Center for Advanced Studies in Tropical Natural Resources, National Research University-Kasetsart University (CASTNAR, NRU-KU), Kasetsart University, Bangkok, Thailand
- Department of Biology, Faculty of Science, Naresuan University, Muang Phitsanulok, Phitsanulok, Thailand
| | - Kornsorn Srikulnath
- Laboratory of Animal Cytogenetics and Comparative Genomics (ACCG), Department of Genetics, Faculty of Science, Kasetsart University, Chatuchak, Bangkok, Thailand
- Animal Breeding and Genetics Consortium of Kasetsart University (ABG-KU), Kasetsart University, Bangkok, Thailand
- Center for Advanced Studies in Tropical Natural Resources, National Research University-Kasetsart University (CASTNAR, NRU-KU), Kasetsart University, Bangkok, Thailand
- Center of Excellence on Agricultural Biotechnology: (AG-BIO/PERDO-CHE), Bangkok, Thailand
- * E-mail:
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