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Chen S, Liu H, Yang X, Li L, Qi B, Hu X, Ma H, Li C, Pan C. Degradation of sulphated polysaccharides from Grateloupia livida and antioxidant activity of the degraded components. Int J Biol Macromol 2020; 156:660-668. [DOI: 10.1016/j.ijbiomac.2020.04.108] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 04/14/2020] [Accepted: 04/15/2020] [Indexed: 12/29/2022]
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2
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Producing a novel edible film from mushrooms (L. edodes and F. velutipes) byproducts with a two-stage treatment namely grinding and bleaching. J FOOD ENG 2020. [DOI: 10.1016/j.jfoodeng.2019.109862] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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3
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Yoshida BY, Prudencio SH. Alkaline hydrogen peroxide improves physical, chemical, and techno-functional properties of okara. Food Chem 2020; 323:126776. [PMID: 32305806 DOI: 10.1016/j.foodchem.2020.126776] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 04/03/2020] [Accepted: 04/07/2020] [Indexed: 11/20/2022]
Abstract
The objective was to evaluate the effect of modifying okara with alkaline hydrogen peroxide at different H2O2 concentrations and treatment temperatures on its soluble fiber content, water absorption and holding capacity, swelling capacity, and protein solubility in water. Multi-response optimization and characterization of physical, chemical, and techno-functional properties of unmodified and modified okara under optimal condition were performed. Treatment under optimal condition (2% H2O2 and 42 °C for 5 h) resulted in a 601% increase in soluble fiber content, a 26% increase in water absorption and holding capacity and swelling capacity, and a 609% increase in soluble protein. Scanning electron micrographs revealed that modified okara particles had a more fragmented structure and a rougher surface than control. Alkaline hydrogen peroxide treatment altered the color, chemical composition, and techno-functional properties of okara. The modification method has potential to add value to okara and contribute to the use of agro-industrial residues.
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Affiliation(s)
- Bruna Yumi Yoshida
- Londrina State University, Department of Food Science and Technology, 86057-970 Londrina, Parana State, Brazil
| | - Sandra Helena Prudencio
- Londrina State University, Department of Food Science and Technology, 86057-970 Londrina, Parana State, Brazil.
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4
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Tso KM, Ni B, Wong HC. Oxidative Disinfectants Activate Different Responses in Vibrio parahaemolyticus. J Food Prot 2019; 82:1890-1895. [PMID: 31622162 DOI: 10.4315/0362-028x.jfp-19-191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Vibrio parahaemolyticus is a prevalent seafoodborne enteropathogen that has become a global concern since the spread of its pandemic strain in 1996. This study investigates the responses of this pathogen to the oxidative disinfectants hydrogen peroxide, chlorine dioxide, and peracetic acid. Expression of the regulator genes oxyR and rpoS, determined by reverse transcription PCR, in V. parahaemolyticus wild-type, oxyR mutant, and rpoS mutant strains exhibited similar patterns in response to the tested oxidative disinfectants. The transcription of the rpoS gene was markedly enhanced in the oxyR mutant strain in the exponential phase. The expression of catalase KatE1 was tracked by using a LacZ fusion reporter in these strains. The experimental results revealed that KatE1 was a significant scavenger of hydrogen peroxide and peracetic acid in V. parahaemolyticus, and RpoS may partially compensate for the regulatory role of OxyR in the oxyR mutant strain. In contrast to its responses to hydrogen peroxide and paracetic acid, KatE1 was not the primary scavenger of chlorine dioxide in these V. parahaemolyticus strains. This study shows that these disinfectants activated a basic oxidative response in this pathogen with different features.
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Affiliation(s)
- Kai-Ming Tso
- Department of Microbiology, Soochow University, Taipei, Taiwan 111, Republic of China (ORCID: https://orcid.org/0000-0001-5556-7416 [H.-C.W.])
| | - Bin Ni
- Department of Microbiology, Soochow University, Taipei, Taiwan 111, Republic of China (ORCID: https://orcid.org/0000-0001-5556-7416 [H.-C.W.])
| | - Hin-Chung Wong
- Department of Microbiology, Soochow University, Taipei, Taiwan 111, Republic of China (ORCID: https://orcid.org/0000-0001-5556-7416 [H.-C.W.])
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He B, Guo L, Zheng Q, Lin S, Lin J, Wei T, Ye Z. A simple and effective method using macroporous resins for the simultaneous decoloration and deproteinisation of
Cordyceps militaris
polysaccharides. Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.14063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Bao‐Lin He
- College of Food Science & Institute of Food Biotechnology South China Agricultural University Guangzhou 510640 China
- Research Center for Micro‐Ecological Agent Engineering and Technology of Guangdong Province Guangzhou 510640 China
| | - Li‐Qiong Guo
- College of Food Science & Institute of Food Biotechnology South China Agricultural University Guangzhou 510640 China
- Research Center for Micro‐Ecological Agent Engineering and Technology of Guangdong Province Guangzhou 510640 China
| | - Qian‐Wang Zheng
- College of Food Science & Institute of Food Biotechnology South China Agricultural University Guangzhou 510640 China
- Research Center for Micro‐Ecological Agent Engineering and Technology of Guangdong Province Guangzhou 510640 China
| | - Shuo‐Xin Lin
- James Clark School of Engineering University of Maryland College Park MD 20742 USA
| | - Jun‐Fang Lin
- College of Food Science & Institute of Food Biotechnology South China Agricultural University Guangzhou 510640 China
- Research Center for Micro‐Ecological Agent Engineering and Technology of Guangdong Province Guangzhou 510640 China
| | - Tao Wei
- College of Food Science & Institute of Food Biotechnology South China Agricultural University Guangzhou 510640 China
- Research Center for Micro‐Ecological Agent Engineering and Technology of Guangdong Province Guangzhou 510640 China
| | - Zhi‐Wei Ye
- College of Food Science & Institute of Food Biotechnology South China Agricultural University Guangzhou 510640 China
- Research Center for Micro‐Ecological Agent Engineering and Technology of Guangdong Province Guangzhou 510640 China
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Sun XY, Wang JM, Ouyang JM, Kuang L. Antioxidant Activities and Repair Effects on Oxidatively Damaged HK-2 Cells of Tea Polysaccharides with Different Molecular Weights. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:5297539. [PMID: 30584463 PMCID: PMC6280578 DOI: 10.1155/2018/5297539] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 08/07/2018] [Accepted: 09/10/2018] [Indexed: 01/04/2023]
Abstract
This study aims at investigating the antioxidant activity and repair effect of green tea polysaccharide (TPS) with different molecular weights (Mw) on damaged human kidney proximal tubular epithelial cells (HK-2). Scavenging activities on hydroxyl radical (·OH) and ABTS radical and reducing power of four kinds of TPS with Mw of 10.88 (TPS0), 8.16 (TPS1), 4.82 (TPS2), and 2.31 kDa (TPS3) were detected. A damaged cell model was established using 2.6 mmol/L oxalate to injure HK-2 cells. Then, different concentrations of TPSs were used to repair the damaged cells. Index changes of subcellular organelles of HK-2 cells were detected before and after repair. The four kinds of TPSs possessed radical scavenging activity and reducing power, wherein TPS2 with moderate Mw presented the strongest antioxidant activity. After repair by TPSs, cell morphology of damaged HK-2 cells was gradually restored to normal conditions. Reactive oxygen species production decreased, and mitochondrial membrane potential (Δψm) of repaired cells increased. Cells of G1 phase arrest were inhibited, and cell proportion in the S phase increased. Lysosome integrity improved, and cell apoptotic rates significantly reduced in the repaired group. The four kinds of TPSs with varying Mw displayed antioxidant activity and repair effect on the mitochondria, lysosomes, and intracellular DNA. TPS2, with moderate Mw, showed the strongest antioxidant activity and repair effect; it may become a potential drug for prevention and treatment of kidney stones.
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Affiliation(s)
- Xin-Yuan Sun
- Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China
| | - Jian-Min Wang
- Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China
| | - Jian-Ming Ouyang
- Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China
| | - Li Kuang
- Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China
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7
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Single-step enzyme processing of soybeans into intact oil bodies, protein bodies and hydrolyzed carbohydrates. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.02.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Pierce BC, Agger JW, Zhang Z, Wichmann J, Meyer AS. A comparative study on the activity of fungal lytic polysaccharide monooxygenases for the depolymerization of cellulose in soybean spent flakes. Carbohydr Res 2017; 449:85-94. [PMID: 28750348 DOI: 10.1016/j.carres.2017.07.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 06/21/2017] [Accepted: 07/17/2017] [Indexed: 12/15/2022]
Abstract
Lytic polysaccharide monooxygenases (LPMOs) are copper-dependent enzymes capable of the oxidative breakdown of polysaccharides. They are of industrial interest due to their ability to enhance the enzymatic depolymerization of recalcitrant substrates by glycoside hydrolases. In this paper, twenty-four lytic polysaccharide monooxygenases (LPMOs) expressed in Trichoderma reesei were evaluated for their ability to oxidize the complex polysaccharides in soybean spent flakes, an abundant and industrially relevant substrate. TrCel61A, a soy-polysaccharide-active AA9 LPMO from T. reesei, was used as a benchmark in this evaluation. In total, seven LPMOs demonstrated activity on pretreated soy spent flakes, with the products from enzymatic treatments evaluated using mass spectrometry and high performance anion exchange chromatography. The hydrolytic boosting effect of the top-performing enzymes was evaluated in combination with endoglucanase and beta-glucosidase. Two enzymes (TrCel61A and Aspte6) showed the ability to release more than 36% of the pretreated soy spent flake glucose - a greater than 75% increase over the same treatment without LPMO addition.
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Affiliation(s)
- Brian C Pierce
- DuPont™ Nutrition Biosciences ApS, Edwin Rahrs Vej 38 Brabrand, 8220, Denmark; Department of Chemical and Biochemical Engineering, Center for Bioprocess Engineering, Technical University of Denmark, Søltofts Plads, Building 229, Kgs. Lyngby, 2800, Denmark; DuPont™ Nutrition & Health - Protein Solutions, 4300 Duncan Ave., Saint Louis, MO, 63110, USA.
| | - Jane Wittrup Agger
- Department of Chemical and Biochemical Engineering, Center for Bioprocess Engineering, Technical University of Denmark, Søltofts Plads, Building 229, Kgs. Lyngby, 2800, Denmark.
| | - Zhenghong Zhang
- DuPont™ Industrial Biosciences, China Research Center, Building 10, Lane 280, Linhong Road, Shanghai, 200335, PR China; State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, PR China.
| | - Jesper Wichmann
- DuPont™ Nutrition Biosciences ApS, Edwin Rahrs Vej 38 Brabrand, 8220, Denmark.
| | - Anne S Meyer
- Department of Chemical and Biochemical Engineering, Center for Bioprocess Engineering, Technical University of Denmark, Søltofts Plads, Building 229, Kgs. Lyngby, 2800, Denmark.
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Yuan C, Chen M, Luo J, Li X, Gao Q, Li J. A novel water-based process produces eco-friendly bio-adhesive made from green cross-linked soybean soluble polysaccharide and soy protein. Carbohydr Polym 2017; 169:417-425. [PMID: 28504164 DOI: 10.1016/j.carbpol.2017.04.058] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Revised: 04/19/2017] [Accepted: 04/20/2017] [Indexed: 11/28/2022]
Abstract
In this study, an eco-friendly soy protein adhesive was developed that utilized two components from soybean meal without addition of any toxic material. A plant-based, water-soluble and inexpensive soybean soluble polysaccharide was used as the novel renewable material to combine with soy protein to produce a soy protein adhesive. Three-plywood was fabricated with the resulting adhesive, and its wet shear strength was measured. The results showed the wet shear strength of plywood bonded by the adhesive reached 0.99MPa, meeting the water resistance requirement for interior use panels. This improvement was attributed to the following reasons: (1) Combination of cross-linked soybean soluble polysaccharide and soy protein formed an interpenetrating network structure, improving the thermal stability and water resistance of the cured adhesive. (2) Adding CL-SSPS decreased the adhesive viscosity to 15.14Pas, which increased the amount of the adhesive that penetrate the wood's surface and formed more interlocks.
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Affiliation(s)
- Cheng Yuan
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Mingsong Chen
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Jing Luo
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Xiaona Li
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Qiang Gao
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Jianzhang Li
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
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Pierce BC, Agger JW, Wichmann J, Meyer AS. Oxidative cleavage and hydrolytic boosting of cellulose in soybean spent flakes by Trichoderma reesei Cel61A lytic polysaccharide monooxygenase. Enzyme Microb Technol 2017; 98:58-66. [PMID: 28110665 DOI: 10.1016/j.enzmictec.2016.12.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 12/01/2016] [Accepted: 12/26/2016] [Indexed: 01/06/2023]
Abstract
The auxiliary activity family 9 (AA9) copper-dependent lytic polysaccharide monooxygenase (LPMO) from Trichoderma reesei (EG4; TrCel61A) was investigated for its ability to oxidize the complex polysaccharides from soybean. The substrate specificity of the enzyme was assessed against a variety of substrates, including both soy spent flake, a by-product of the soy food industry, and soy spent flake pretreated with sodium hydroxide. Products from enzymatic treatments were analyzed using mass spectrometry and high performance anion exchange chromatography. We demonstrate that TrCel61A is capable of oxidizing cellulose from both pretreated soy spent flake and phosphoric acid swollen cellulose, oxidizing at both the C1 and C4 positions. In addition, we show that the oxidative activity of TrCel61A displays a synergistic effect capable of boosting endoglucanase activity, and thereby substrate depolymerization of soy cellulose, by 27%.
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Affiliation(s)
- Brian C Pierce
- DuPont™ Nutrition Biosciences ApS, Edwin Rahrs Vej 38, Brabrand, 8220, Denmark; Department of Chemical and Biochemical Engineering, Center for Bioprocess Engineering, Technical University of Denmark, Søltofts Plads, Building 229, Kgs. Lyngby 2800, Denmark.
| | - Jane Wittrup Agger
- Department of Chemical and Biochemical Engineering, Center for Bioprocess Engineering, Technical University of Denmark, Søltofts Plads, Building 229, Kgs. Lyngby 2800, Denmark.
| | - Jesper Wichmann
- DuPont™ Nutrition Biosciences ApS, Edwin Rahrs Vej 38, Brabrand, 8220, Denmark.
| | - Anne S Meyer
- Department of Chemical and Biochemical Engineering, Center for Bioprocess Engineering, Technical University of Denmark, Søltofts Plads, Building 229, Kgs. Lyngby 2800, Denmark.
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