In Vitro Antioxidant And Anti-Inflammatory Activities Of Tea Flower Extract And Its Inhibitory Effect On Cell Aging,
2025
Yunnan Botanee Bio-technology Group Co ., Ltd ., Kunming 650106 , China;Shanghai Botanee Bio-technology Group Co ., Ltd ., Shanghai 201702 , China
In Vitro Antioxidant And Anti-Inflammatory Activities Of Tea Flower Extract And Its Inhibitory Effect On Cell Aging, Shishuai Yu, Yining Hao, Bo Peng, Youyun Liu, Liping Qu
Journal of Food Science and Biotechnology
[Objective ] This study aims to investigate the in vitro antioxidant and anti-inflammatory activities of Yunnan tea flower extract (TFE ) and its Inhibitory effect on cell aging.[Method ] The main active components in TFE were determined by ultraviolet (UV)-visible spectrophotometry and high performance liquid chromatography (HPLC ).The antioxidant and anti-inflammatory activities of TFE were determined by the free radical scavenging assay and UV-induced photoaging model of human keratinocytes (HaCaT ),respectively.After the aging model of fibroblasts was established,the aging level of cells was assessed by the β-galactosidase (β-gal) staining assay,and the expression of matrix metalloproteinase- 1 (MMP- 1),matrix metalloproteinase- 3 …
Synthesis Of N-Acetyl- Trans -4-Hydroxyproline Catalyzed By Acyltransferase,
2025
School of Biotechnology , Jiangnan University , Wuxi 214122 , China
Synthesis Of N-Acetyl- Trans -4-Hydroxyproline Catalyzed By Acyltransferase, Chuanxiang Wei, Keru Chen, Yun Hu, Chao Sun, Rukang Xue, Fubao Sun, Jingfang Cheng
Journal of Food Science and Biotechnology
[Objective ] This study aims to establish the biosynthesis process of N-acetyl- trans -4-hydroxyproline (N-ATHOP ).[Method ] Escherichia coli (E.coli ) BL21 (DE3) was selected as the host to heterologously express the acyltransferase (MsAcT ) derived from Mycobacterium smegmatis.A semi-rational design was employed to construct the mutant MsAcT (S11C) capable of catalyzing the synthesis of N-ATHOP.[Result ] The catalytic reaction conditions of the mutant MsAcT (S11C) were optimized as pH 6.9,reaction temperature 49 ℃,initial trans -4-hydroxyproline (THOP ) concentration of 315.5 mmol/L,and vinyl acetate volume fraction of 10%.Under the optimized conditions,the yield of N-ATHOP synthesized under the catalysis of MsAcT …
Zeaxanthin Encapsulated With High Internal Phase Emulsions And Its Stability,
2025
School of Biotechnology , Jiangnan University , Wuxi 214122 , China;Key Laboratory of Industrial Biotechnology , Ministry of Education , Jiangnan University , Wuxi 214122 , China
Zeaxanthin Encapsulated With High Internal Phase Emulsions And Its Stability, Ya Li, Ying Ou, Jie Lu, Shuo Meng, Shoushuai Feng, Hailin Yang
Journal of Food Science and Biotechnology
[Objective ] This study prepared highly stable high internal phase emulsions (HIPEs ) to encapsulate zeaxanthin,thereby improving the stability and expanding the food and pharmaceutical applications of zeaxanthin.[Method ] HIPEs were prepared with the gelatin-chitosan suspension for encapsulation of zeaxanthin extracted from goji berries.Ultra-performance convergence chromatography (UPCC ) was employed to separate zeaxanthin.Confocal laser scanning microscopy (CLSM ) was employed to observe the emulsion structure.The rheological analysis was performed to characterize the emulsion,which was combined with the hydrogen peroxide and storage stability tests to evaluate the performance of encapsulation with HIPEs in improving the stability of zeaxanthin.[Result ] The separation …
Health Risk Assessment Of Multiple Mycotoxins In Rice , Maize , Soybean , And Wheat Flour Marketed In Shanghai,
2025
The Institute for Agro-food Standards and Testing Technology , Shanghai Academy of Agricultural Sciences , Shanghai 201403 , China
Health Risk Assessment Of Multiple Mycotoxins In Rice , Maize , Soybean , And Wheat Flour Marketed In Shanghai, Zuoyin Zhu, Jie Wang, Junmei Ma, Hanke Zhao, Haisheng Cheng, Chengbao Huang, Junhua Yang
Journal of Food Science and Biotechnology
[Objective ] This study aims to evaluate the potential health risks to consumers from exposure to multiple mycotoxins in grains.[Method ] Point and probabilistic assessment models were adopted to analyze the dietary exposure risks of adult residents in Shanghai to aflatoxins (AFs),ochratoxin A (OTA ),zearalenone (ZEN ),deoxynivalenols (DONs ),and fumonisins (FBs) through consumption of rice,maize,soybeans,and wheat flour.[Result ] The margin of exposure values (MoE ) for AFs in maize and aflatoxin G 1 (AFG 1) in soybeans exceeded 10 000,indicating no dietary exposure risk.In contrast,AFs in rice and wheat flour,as well as aflatoxin B 1 (AFB 1),aflatoxin B 2 (AFB …
Identification And Spoilage Capacity Analysis Of Main Spoilage Bacteria In Pickles,
2025
Yueyang Inspection and Testing Center ,Yueyang 410042 ,China;Hunan Provincial Pickles Product Quality Supervision and Inspection Center , Yueyang 410042 , China
Identification And Spoilage Capacity Analysis Of Main Spoilage Bacteria In Pickles, Li Zhu, Huimin Li, Liejiang Yuan, Cancan Peng, Bo Zhou, Sheng Song, Haizhi Wu, Mingyang Zhu, Fangmei Wang, Yu Liu, Yuqian Hu, Ge Li, Yiqing Sun, Yi Zhou
Journal of Food Science and Biotechnology
[Objective ] This study aims to identify the main spoilage bacteria and evaluate their spoilage capacity in the spoilage process of pickles.[Method ] High-throughput sequencing was employed to analyze the microbial community dynamics in the samples of pickles at the early,middle,and late stages of spoilage.The key spoilage bacteria were isolated,purified,and then identified through a combination of colony morphology observation,biochemical analysis,and 16S rDNA/ITS sequencing.Re-inoculation experiments were carried out for further validation of the primary spoilage bacteria in pickles.[Result ] Acinetobacter and Bacillus were the dominant spoilage bacterial genera across the three spoilage stages.Notably,Bacillus exhibited rapid growth over time,with the relative abundance …
Establishment And Application Of An Immunomagnetic Bead-Based Melisa Method For Olaquindox,
2025
Institute of Sea Food , Zhejiang Gongshang University , Hangzhou 310012 , China
Establishment And Application Of An Immunomagnetic Bead-Based Melisa Method For Olaquindox, Ziyi Chen, Yanling Song, Junjie Sun, Yinlai Li, Lu Zhai, Yaofeng Zhang, Junli Feng, Renyao Jin
Journal of Food Science and Biotechnology
[Objective ] This study aims to establish a magnetic bead enzyme-linked immunosorbent assay (MELISA ) method for olaquindox (OLA ) based on immunomagnetic beads.[Method ] First,olaquindox-hapten conjugated with horseradish peroxidase (OLA-HS-HRP ) and immunomagnetic beads were synthesized.Then,the conjugated immunomagnetic beads and OLA-HS-HRP were used to screen and optimize the reaction conditions of MELISA.[Result ] The optimal working dilution factors for the immunomagnetic beads and OLA-HS-HRP were 100 times and 8 000 times,respectively,with the antibody dilution buffer being PBS solution (0.010 mol/L,pH 7.0) containing methanol at a volume fraction of 5%.Under the optimized conditions,the established standard equation was y=13.593ln x+17.173 (R2=0.994 …
Establishment And Application Of A Uplc-Ms/Ms Method For Simultaneous Determination Of 39 Veterinary Drugs And Their Metabolites In Black Bone Chicken,
2025
School of Animal Science and Technology , Ningxia University , Yinchuan 750021 , China
Establishment And Application Of A Uplc-Ms/Ms Method For Simultaneous Determination Of 39 Veterinary Drugs And Their Metabolites In Black Bone Chicken, Jiawei Du, Yongqin Li, Shuangyuan Jin, Xueyan Wang, Hongwu Wen, Xuelian Guo, Hao Li, Lihua Xu
Journal of Food Science and Biotechnology
[Objective ] This study aims to comprehensively investigate the risk of veterinary drug residues in black bone chicken.[Method ] A method for rapid and simultaneous analysis of 39 veterinary drugs and their metabolites in three categories was established based on low-temperature ultrasonic extraction,solid-phase extraction pretreatment,and ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS ).The samples were extracted by Mcllvaine-Na 2EDTA and phosphate buffer via ultrasonic treatment at low temperatures,purified by Oasis HLB solid-phase extraction column,separated by T 3 chromatographic column,and quantified by the matrix matching external standard method.[Result ] The 39 veterinary drugs and their metabolites showed good linear relationships in …
Cazyme Gene Cluster Diversity In Human Gut Microbiome,
2025
University of Nebraska-Lincoln
Cazyme Gene Cluster Diversity In Human Gut Microbiome, Yi Xing
Department of Food Science and Technology: Dissertations, Theses, and Student Research
In gut microbiome research, carbohydrate-active enzyme gene clusters (CGCs) have emerged as key functional units for understanding microbial glycan degradation. Unlike taxonomic or broad pathway annotations, CGCs offer gene-cluster-level resolution and capture substrate-specific microbial functions. However, their diversity and distribution in relation to host metabolic phenotypes, such as obesity, remain poorly characterized. This study tests the hypothesis that the composition and abundance of fiber-targeting CGCs vary between obese and healthy human gut microbiomes, reflecting distinct microbial carbohydrate utilization strategies. To examine this, we constructed a high-quality reference CGC dataset comprising 94,019 clusters from the Unified Human Gastrointestinal Genome and profiled …
Research Progress In The Application Of Tea Polyphenols In Meat Processing And Preservation,
2025
College of Food Science and Engineering , Ningbo University , Ningbo 315211 , China
Research Progress In The Application Of Tea Polyphenols In Meat Processing And Preservation, Yanting Gao, Huanhuan Li, Teng Xu, Ke Zhao, Mingwei Su, Liwen Wu, Honggang Tang
Journal of Food Science and Biotechnology
Tea polyphenols are the general term for polyphenols in tea,mainly including catechins,flavonoids,and anthocyanins,which have antioxidant and antimicrobial properties.The author reviewed the structural characteristics and the antioxidant and antibacterial mechanisms of tea polyphenols.Additionally,the application of tea polyphenols in the processing and preservation of meat products is summarized,providing a theoretical basis for their use in meat products.Studies have shown that tea polyphenols can achieve anti-oxidation by scavenging free radicals,chelating metal ions,and inhibiting oxidase activity.Moreover,tea polyphenols can inhibit cell growth and proliferation by inhibiting the activities of enzymes involved in cell metabolism and damaging the cell membrane system.As natural antioxidants,tea polyphenols can significantly …
Safety Properties , Growth Characteristics , And Fermentation Performance Of Tetragenococcus Halophilus,
2025
College of Food Science , South China Agricultural University , Guangzhou 510642 , China
Safety Properties , Growth Characteristics , And Fermentation Performance Of Tetragenococcus Halophilus, Ranhui Lyu, Yanhua Zhong, Yang You, Runhan Yuan, Enyi Guan, Shan Duan
Journal of Food Science and Biotechnology
[Objective ] The physiological characteristics vary greatly among different strains of Tetragenococcus halophilus (T.halophilus ).By comparing some indicators of safety properties,growth characteristics,and fermentation performance of T.halophilus strains from different sources,the authors aim to establish a regular understanding of this bacterial species.[Method ] Seventeen strains of T.halophilus derived from different aquatic products and soy sauce mash were selected,and their antibiotic resistance,biogenic amine production,hemolytic activity,growth under different environmental conditions,and flavor characteristics after fermenting soybean hydrolysate were determined.Additionally,correlation analysis was conducted to identify the associations among various indicators.[Result ] In terms of safety properties,the 17 strains were generally sensitive to penicillin,vancomycin,and tetracycline,but resistant …
Analysis Of Volatile Aroma Components Of Black Tea Samples From Different Tea Varieties In Guangxi Based On Hs-Spme-Gc-Ms Technology,
2025
Guangxi South Subtropical Agricultural Sciences Research Institute , Chongzuo 532415 , China
Analysis Of Volatile Aroma Components Of Black Tea Samples From Different Tea Varieties In Guangxi Based On Hs-Spme-Gc-Ms Technology, Yunxiong Zhao, Hongyu Feng, Ziping Li, Baogui Liu, Yunxian Wang, Jingjing Yang, Lianfeng Luo
Journal of Food Science and Biotechnology
[Objective ] This study aims to analyze the characteristics of volatile aroma components and key aroma components of black tea samples from different tea varieties in Guangxi.[Method ] The aroma components of 12 black tea samples from Guangxi were identified by sensory quality evaluation,headspace solid-phase microextraction-gas chromatography-mass spectrometry （HS-SPME-GC-MS ）,hierarchical cluster analysis,and orthogonal partial least squares-discrimination analysis (OPLS-DA ).[Result ] The black tea samples from different tea varieties showed different aroma characteristics and mainly presented a floral fruity aroma or a sweet aroma.The black tea from ‘Wuniuzao ’ demonstrated the highest comprehensive score (91.20),being a representative of black tea with …
Construction , Structural Characterization , And Antioxidant Activity Evaluation Of Yam Polysaccharide-Selenium Nanoparticle Complexes,
2025
College of Food Science and Technology , Wuhan Business University , Wuhan 430056 , China
Construction , Structural Characterization , And Antioxidant Activity Evaluation Of Yam Polysaccharide-Selenium Nanoparticle Complexes, Yidong Xiao, Lanmei Ou, Mengmeng Zhao
Journal of Food Science and Biotechnology
[Objective ] This study explored the structural characteristics and in vitro antioxidant activity of yam polysaccharide-selenium nanoparticle (YP-SeNPs ) complexes.[Method ] Yam polysaccharide (YP) were obtained through hot water extraction and then purified by purification,diethylaminoethyl cellulose 52 (DEAE-52) column chromatography,and dialysis.With YP as a template,YP-SeNPs were prepared with different Se/YP mass ratios (1∶3,1∶1,and 4∶3) in an oxidation-reduction system comprising ascorbic acid (VC) and sodium selenite (Na 2SeO 3）.The complexes were characterized via multiple techniques,including visual observation of solution color,ultraviolet-visible absorption (UV-vis ) spectroscopy,particle size measurement,transmission electron microscopy (TEM ),scanning electron microscopy (SEM ),atomic force microscopy (AFM ),Fourier-transform infrared spectroscopy (FT-IR …
Preparation And Anti-Exercise Fatigue Effect Evaluation Of Γ-Aminobutyric Acid-Enriched Milk Fermented With Lactic Acid Bacteria,
2025
Physical Education College , Suihua University , Suihua 152001 , China
Preparation And Anti-Exercise Fatigue Effect Evaluation Of Γ-Aminobutyric Acid-Enriched Milk Fermented With Lactic Acid Bacteria, Dong Liu, Yuning Yang, Fangfei Dou, Yuxing Li, Minghai Ju
Journal of Food Science and Biotechnology
[Objective ] This study aims to prepare γ-aminobutyric acid (GABA )-enriched milk fermented with lactic acid bacteria and evaluate its anti-exercise fatigue effect.[Method ] High GABA-producing lactic acid bacteria were selected and used to ferment milk with a commercial starter culture.A mouse model of exercise fatigue was established by four weeks of exhaustive swimming training.After four weeks,the exhaustive swimming time,serum biochemical indicators,antioxidant indicators,and energy storage substance levels were measured and analyzed.[Result ] Lactobacillus plantarum (L.plantarum ) LP- 5 was selected as the strain for fermentation,and its GABA yield reached (1.340±0.003) g/L.The fermented milk showed the titratable acidity of (46.29±2.01) ºT,the …
Research Progress In Application Of Ultra-High Pressure Sterilization In The Processing Of Prepared Dishes,
2025
State Key Laboratory of Space Medicine , China Astronaut Research and Training Center , Beijing 100094 , China
Research Progress In Application Of Ultra-High Pressure Sterilization In The Processing Of Prepared Dishes, Haisheng Dong, Peng Zang
Journal of Food Science and Biotechnology
As a non-thermal sterilization technology,ultra-high pressure sterilization can protect the thermosensitive nutrients and maintain the texture of food,demonstrating unique technical advantages in the processing of prepared dishes.By a review of domestic and foreign literature and performance of relevant equipment,this paper introduced the principle,equipment,and parameters of ultra-high pressure sterilization.Considering the parameters of ultra-high pressure sterilization and the effects of food ingredients on the pressure tolerance of different microbial species,the factors affecting the effect of ultra-high pressure sterilization were analyzed.In addition,the effects of ultra-high pressure sterilization on the physical and chemical properties,sensory quality,enzyme activity,microorganisms count and bioactive substances of prepared dishes were …
Research Progress In Biological Activities , Mechanisms Of Action , And Applications Of Antimicrobial Peptides,
2025
School of Food and Bioengineering , Changsha University of Science and Technology , Changsha 410114 , China
Research Progress In Biological Activities , Mechanisms Of Action , And Applications Of Antimicrobial Peptides, Yuxin Jiao, Ruolan Shan, Xufeng Wang, Maolong Chen, Li Wen, Yunhui Cheng, Hao Wu
Journal of Food Science and Biotechnology
The widespread abuse of traditional antibiotics has led to the emergence and development of antimicrobial peptides due to the resultant bacterial resistance.Antimicrobial peptides demonstrate high efficacy in combating infectious pathogens and possess unique antimicrobial mechanisms and biocompatibility,effectively reducing the bacterial resistance rate.The high structural adaptability endows antimicrobial peptides with multiple biological activities,enabling targeted action against diverse types of pathogens and abnormal cells.Accordingly,antimicrobial peptides exhibit a promising development prospect.Enhanced stability contributes to prolonging the in vivo half-life and improving the bioavailability of antimicrobial peptides,which holds crucial importance for improving the clinical translation value of antimicrobial peptides.The author summarizes the research progress …
Mechanisms Of The Quality Changes Of Polygonati Rhizoma Processed By Steaming-Drying Cycles,
2025
School of Food Science and Technology , Jiangnan University , Wuxi 214122 , China
Mechanisms Of The Quality Changes Of Polygonati Rhizoma Processed By Steaming-Drying Cycles, Zicong Yu, Liuping Fan
Journal of Food Science and Biotechnology
[Objective ] This study aims to investigate the effects of steaming-drying cycles on the quality changes of Polygonati rhizoma and optimize the processing technology to enhance its application value.[Method ] Slices of Polygonati rhizoma processed by 0~5 steaming-drying cycles were prepared.The drying rate and drying kinetics during the drying stage after each cycle were analyzed,and a drying model was fitted.Changes in color difference,appearance,hardness,and mass fractions of polysaccharides,reducing sugars,polyphenols,flavonoids,saponins,and calcium oxalate raphides were measured.[Result ] The number of steaming-drying cycles significantly affected the quality of Polygonati rhizoma.The drying rate decreased as the drying time increased,conforming to the Modified Page model,while the …
Determination Of Microorganisms And Analysis Of Factors Influencing Osmophilic Yeasts In Apis Cerana Honey,
2025
Institute of Apicultural Research , Chinese Academy of Agricultural Sciences , Beijing 100093 , China;State Key Laboratory of Resource Insects , Beijing 100093 , China;Key Laboratory of Bee Products for Quality and Safety Risk Assessment , Ministry of Agriculture and Rural Affairs , Beijing 100093 , China
Determination Of Microorganisms And Analysis Of Factors Influencing Osmophilic Yeasts In Apis Cerana Honey, Mei Song, Hongxia Li, Zhaolong Liu, Dong Qiao, Na Li, Lanzhen Chen
Journal of Food Science and Biotechnology
[Objective ] This study determined the mold count,total plate count,and osmophilic yeast count in Apis cerana honey and explored the correlations of osmophilic yeasts with quality parameters and storage conditions of the honey.[Method ] A total of 105 Apis cerana honey samples were used for the determination of mold count,total plate count,and osmophilic yeast count,as well as odor,moisture,phenolic acids,and carbohydrates.The correlations between quality indexes and osmophilic yeasts and the effects of different storage conditions on osmophilic yeast count were explored.[Result ] Among the 105 samples,1,1,and 67 samples showed the mold count,total plate count,and osmophilic yeast count exceeding the national standards.All …
Photosensitizer-Loaded Glycogen For Photodynamic Therapy Of Tumor,
2025
School of Life Sciences and Health Engineering , Jiangnan University , Wuxi 214122 , China;School of Biotechnology , Jiangnan University , Wuxi 214122 , China
Photosensitizer-Loaded Glycogen For Photodynamic Therapy Of Tumor, Keke Ma, Jiurui Fang, Huijie Zhang, Jinghua Chen
Journal of Food Science and Biotechnology
[Objective ] The aim of this study is to synthesize aminated glycogen (NG) for loading of the photosensitizer TTVBA and construct a nano drug delivery system (NGT NPs ) for photodynamic therapy (PDT ) of tumors.[Method ] Positively charged NG was synthesized through modification of glycogen with diethylenetriamine (DETA ).Then,TTVBA was encapsulated by NG via electrostatic interaction to prepare NGT NPs.The prepared NGT NPs were characterized by infrared spectroscopy,dynamic light scattering (DLS ),and transmission electron microscopy (TEM ).The hemolysis assay was performed to evaluate the biocompatibility of NGT NPs.The reactive oxygen species (ROS ) generation capability of cells treated with …
Prokaryotic Expression , Purification , And Polyclonal Antibody Preparation Of Chlamydomonas Reinhardtii Channelrhodopsin 1,
2025
State Key Laboratory of Food Nutrition and Safety , Tianjin University of Science & Technology , Tianjin 300457 , China
Prokaryotic Expression , Purification , And Polyclonal Antibody Preparation Of Chlamydomonas Reinhardtii Channelrhodopsin 1, Jiurong Wang, Bin Xue, Zhenchuan Fan
Journal of Food Science and Biotechnology
[Objective ] This study aims to prepare a highly specific antibody against channelrhodopsin- 1 (ChR 1) from Chlamydomonas reinhardtii (C.reinhardtii ) and investigate its regulatory mechanisms in cellular phototaxis and negative phototaxis.[Method ] The recombinant expression vector pET- 28a(+)-chr1 was constructed and transformed into Escherichia coli (E.coli ) BL21 (DE3) competent cells.The expression of the fusion protein 6×His∷ChR 1 was induced with IPTG,and the obtained protein was purified by nickel-affinity chromatography.The purified protein was used to immunize New Zealand white rabbits for the production of ChR 1 antiserum.ChR 1-specific IgG antibodies were enriched from the antiserum through protein A purification.The …
Engineering Escherichia Coli Tolerance To Improve Succinic Acid Production,
2025
School of Biotechnology , Jiangnan University , Wuxi 214122 , China
Engineering Escherichia Coli Tolerance To Improve Succinic Acid Production, Jingyu Pan, Yongsheng Tang, Jia Liu, Cong Gao, Xiaomin Li, Wei Song, Wanqing Wei, Guipeng Hu, Jing Wu, Liming Liu, Xiulai Chen
Journal of Food Science and Biotechnology
[Objective ] This study aims to enhance the high osmotic pressure tolerance of Escherichia coli (E.coli ) for the efficient production of succinic acid.[Method ] Adaptive evolution,transcriptomic analysis,reverse metabolic engineering,and fermentation optimization were employed for improving E.coli tolerance to high osmotic pressure.[Result ] By analyzing the key factors influencing succinic acid production by fermentation,osmotic pressure was identified as the critical factor reducing succinic acid production efficiency.A mutant strain,E.coli FN-6,with tolerance to high osmotic pressure was obtained through adaptive evolution.The key gene cusC responsible for osmotic pressure tolerance was identified by transcriptomic analysis.After optimization of the expression level of cusC,the engineered …
