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Repeated inoculation with rumen fluid accelerates the rumen bacterial transition with no benefit on production performance in postpartum Holstein dairy cows

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Journal of Animal Science and Biotechnology 2024年第2期15卷 795-811页

作者： Fanlin Kong Feiran Wang Yijia Zhang Shuo Wang Wei Wang Shengli Li Beijing Engineering Technology Research Center of Raw Milk quality and Safety control State Key Laboratory of Animal NutritionDepartment of Animal Nutrition and Feed ScienceCollege of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193PR China College of Veterinary Medicine Nanjing Agricultural UniversityNanjingJiangsu 210095PR China

Background The dairy cow’s postpartum period is characterized by dramatic physiological changes,therefore imposing severe challenges on the animal for maintaining health and milk *** dynamics of the ruminal microbiota are also tremendous and may play a crucial role in lactation *** aim to investigate the potential benefits of early microbial intervention by fresh rumen microbiota transplantation(RMT)and sterile RMT in postpartum dairy *** fistulated peak-lactation dairy cows were selected to be the donors for rumen fluid *** postpartum cows were divided into 3 groups as the transplantation receptors respectively receiving 10 L fresh rumen fluid(FR),10 L sterile rumen fluid(SR),or 10 L saline(CON)during 3 d after *** Production performance,plasma indices,plasma lipidome,ruminal microbiome,and liver transcriptome were *** fresh and sterile RMT,we found that the molar proportion of propionic acid was increased on d 7 in the FR and SR groups and the bacterial composition was also significantly changed when compared with the CON group.A similarity analysis showed that the similarities between the CON group and FR or SR group on d 7 were 48.40%or 47.85%,whereas the similarities between microbiota on d 7 and 21 in the FR and SR groups were 68.34%or 66.85%.Dry matter intake and feed efficiency were not affected by ***β-hydroxybutyrate concentration in the FR group was decreased and significantly different lipids mainly included phosphatidylcholine and lysophosphatidylcholine containing polyunsaturated fatty *** transcriptomics analysis indicated acutephase response pathways were upregulated in the SR *** Our study suggests that RMT can shorten the transition process of the ruminal microbiota of postpartum dairy cows with no benefit on dry matter intake or feed *** with rumen fluid may not be a useful approach to promote the recovery of postpartum dairy cows.

关键词： Dairy cow Lipidomics Liver Rumen microbiota transplantation Transition period

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The variation of microbiological characteristics in surface waters during persistent precipitation

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Frontiers of Environmental Science & Engineering 2024年第9期18卷 67-78页

作者： Xinyan Xiao Chenlan Chen Haoran Li Lihua Li Xin Yu College of the Environment&Ecology Xiamen UniversityXiamen 361102China Fujian Key laboratory of Coastal Pollution Prevention and control Xiamen UniversityXiamen 361102China

Climate change leads to an increase in both the frequency and intensity of extreme *** runoff generated by extreme precipitation has a significant impact on ***,the impact of persistent precipitation on surface water quality is easy to neglect,due to its prolonged duration and lower-intensity *** study established eight sampling points within selected surface waters to observe the variation of microbial characteristics in a typical persistence precipitation *** primary difference between Furong Lake(FL)and Chengqian Reservoir(CR)was:the concentrations of dissolved organic carbon(DOC)were 21.3±0.7 and 8.3±1.5 mg/L in FL and CR,*** concentrations of R2A culturable bacteria and coliforms were 10^(4.57)and 10^(1.58)colony-forming units(CFU)/mL in FL,and were 10^(5.46)and 10^(2.64)CFU/mL in CR,*** precipitation,the maximum increase concentrations of R2A,NA culturable bacteria,and coliforms were 10^(0.75),10^(1.30),and 10^(2.27)CFU/mL in FL,***,microbial concentration and rainfall did not increase simultaneously,and a delay phenomenon was observed in the increasing microbial *** analyzing the concentration change trends and correlation of various water quality indicators during persistent precipitation,the significant correlation between the DOC concentration and the changes in the dominant species of microbial community structure was found in this study(pquality visibly,it could still pose potential microbial risks.

关键词： Rainfall Dissolved organic carbon Culturable bacteria Water quality Microbial community structure Climate change

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Eco-friendly regeneration of end-of-life PVDF membrane with triethyl phosphate:Efficiency and mechanism

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Chinese Chemical Letters 2024年第9期35卷 315-319页

作者： Lingna Wang Chenxin Tian Ruobin Dai Zhiwei Wang State Key laboratory of Pollution control and Resource Reuse Shanghai Institute of Pollution Control and Ecological SecuritySchool of Environmental Science and EngineeringTongji UniversityShanghai 200092China

Membrane will inevitably reach the end of its lifespan due to the irrecoverable fouling accumulation in membrane bioreactors(MBRs)during long-term ***,we developed an eco-friendly membrane regeneration strategy with triethyl phosphate(TEP),which successfully prolonged the lifespan of end-of-life(EOL)polyvinylidene fluoride(PVDF)membranes in a large-scale *** regenerated(Rg)membrane exhibited a water permeance of 534.8±45.7 L m^(-2)h^(-1)bar-1,along with stable rejection rate,which was comparable with that of the new ***,compared to the membrane subjected solely to preliminary cleaning,the Rg membrane presented a more hydrophilic surface due to the combination of preliminary cleaning and solvent-based ***,the Rg membrane presented less fouling propensity with the critical flux of 15.2 L m^(-2)h^(-1),significantly higher than that of the EOL membrane(4.0 L m^(-2)h^(-1)).Importantly,the membrane regeneration strategy was capable of guaranteeing the effluent quality in MBR systems for treating real municipal *** study provides an eco-friendly membrane regeneration strategy for effectively removing the irrecoverable foulants,thereby promoting the advancement of sustainable membrane-based wastewater treatment technology.

关键词： End-of-life membrane regeneration Membrane bioreactor Preliminary cleaning Solvent-based processing Irrecoverable fouling removal

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Protective mechanism of quercetin compounds against acrylamide-induced hepatotoxicity

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Food Science and Human Wellness 2024年第1期13卷 225-240页

作者： Linzi Li Xueying Lei Lin Chen Ya Ma Jun Luo Xuebo Liu Xinglian Xu Guanghong Zhou Xianchao Feng College of Food Science and Engineering Northwest A&F UniversityYangling 712100China College of Animal Science and Technology Northwest A&F UniversityYangling 712100China Synergetic Innovation Center of Food Safety and Nutrition Key Laboratory of Meat Processing and Quality ControlMinistry of EducationCollege of Food Science and TechnologyNanjing Agricultural UniversityNanjing 210095China

Quercetin compounds have antioxidant,anti-inflammatory and anticancer pharmacological *** exposure to acrylamide(AA)can cause liver injury and endanger human ***,whether quercetin compounds can attenuate AA-induced liver injury and the specific mechanism are not ***,we studied the mechanism and structure-activity relationship of quercetin compounds in reducing AA-induced hepatotoxicity in vivo and in *** vivo studies found that quercetin-like compounds protect against AAinduced liver injury by reducing oxidative stress levels,activating the Akt/m TOR signaling pathway to attenuate autophagy,and improving mitochondrial apoptosis and endoplasmic reticulum stress-mediated *** vitro studies found that quercetin compounds protected Hep G2 cells from AA by attenuating the activation of AA-induced autophagy,lowering reactive oxygen species(ROS)levels by exerting antioxidant effects and thus attenuating oxidative stress,increasing mitochondrial membrane potential(MMP),and improving apoptosis-related proteins,thus attenuating AA-induced ***,the conformational differences between quercetin compounds correlated with their protective capacity against AA-induced hepatotoxicity,with quercetin showing the best protective capacity due to its strongest antioxidant *** conclusion,quercetin compounds can protect against AA-induced liver injury through multiple pathways of oxidative stress,autophagy and apoptosis,and their protective capacity correlates with antioxidant activity.

关键词： Quercetin compounds Acrylamide Protection mechanism Oxidative stress Antioxidant activity

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Salted egg white derived-peptides VF-4 and DR-8 improve DSS-induced colitis in mice by inhibiting NF-κB/MAPK/PI3K-AKT signaling pathways and modulating gut microbiota composition

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Food Science and Human Wellness 2024年

作者： Na Zhou Na Wu Yao Yao Shuping Chen Mingsheng Xu Zhongping Yin Yan Zhao Yonggang Tu Jiangxi Key laboratory of Natural Products and Functional Food， Jiangxi Agricultural university Agricultural Products Processing and quality control Engineering laboratory of Jiangxi， Jiangxi Agricultural university Jiangxi Experimental Teaching Demonstration Center of Agricultural Products Storage and Processing Engineering， Jiangxi Agricultural university

Inflammation underlies many chronic diseases， and inflammatory bowel disease (IBD) is a condition characterized by long-term inflammation of the gut. Egg whites have been shown to contain many beneficial active substances. Therefore， we obtained two peptides from salted egg white: Val-Val-His-Phe (VF-4) and Asp-Thr-Gln-Ala-Met-Pro-Phe-Arg (DR-8). The sodium dextran sulfate (DSS)-induced mice colitis model was used to evaluate its regulatory effect on colitis in vivo. The results showed that VF-4 and DR-8 improved the clinical symptoms of DSS-induced colitis， attenuated colon tissue damage， inhibited the activation of NF-κB/MAPK/PI3K-AKT signaling pathways， and inhibited the expression of inflammatory cytokines. 16S rRNA gene sequencing showed that VF-4 and DR-8 administration increased the relative abundance of intestinal beneficial bacteria including Lactobacillus， Blautia， and down-regulated the relative abundance of inflammation-related bacteria including Acinetobacter， Lachnospiraceae＿NK4A136＿group， Klebsiella. Moreover， the degree of correlation between pro-inflammatory cytokines and microbiota was as follows: IL-6 > TNF-α > IL-1β > IFN-γ. In conclusion， this study suggests that salted egg white peptides VF-4 and DR-8 have a significant anti-inflammatory effect in vivo. It also provides a strategy for the treatment of inflammatory bowel disease and a new way for the high-value utilization of salted egg white.

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Prediction and validation of diffusive uptake rates for indoor volatile organic compounds in axial passive samplers

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Energy and Built Environment 2024年第1期5卷 24-31页

作者： Yan Wang Tao Yu Jinhan Mo Department of Building Science Tsinghua UniversityBeijing 100084China Beijing Key laboratory of Indoor Air quality Evaluation and control Beijing 100084China Wuhan Second Ship Design and Research Institute Wuhan 430205China School of Energy and Power Engineering Beihang UniversityBeijing 100191China Key laboratory of Eco Planning&Green Building Ministry of Education(Tsinghua University)Beijing 100084China

The diffusive uptake rate is essential for using passive samplers to measure indoor volatile organic compounds(VOCs).The traditional theoretical model of passive samplers requires available regression formulas of uptake rates and physicochemical properties of adsorbents to predict the uptake ***,it is difficult to obtain the uptake rates of different VOCs under different sampling periods,and it is also difficult to obtain the physical parameters of adsorbents accurately and *** study provides a reliable numerical prediction method of diffusive uptake rates of *** modeling was based on the standard automated thermal desorption(ATD)tubes packed with Tenax TA and the mass transfer process during *** experimental determinations of toluene uptake rate are carried out to verify the prediction *** uptake rates of typical indoor VOCs are obtained from the literature to calibrate the key apparent parameters in the model by statistical regression *** predicted model can provide the VOC diffusive uptake rates under different sampling duration with an average deviation of less than 5%.This study can provide the basis for fast and accurate prediction of diffusive uptake rates for various VOC pollutants in built environments.

关键词： Indoor air quality Diffusive uptake rate Prediction model Sampling Adsorption

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Investigation on taste characteristics and sensory perception of soft-boiled chicken during oral processing based on electronic tongue and electronic nose

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Food Science and Human Wellness 2024年第1期13卷 313-326页

作者： Na Xu Xianming Zeng Peng Wang Xing Chen Xinglian Xu Minyi Han College of Food Science and Technology Nanjing Agricultural UniversityNanjing 210095China National Center of Meat quality and Safety control Nanjing Agricultural UniversityNanjing 210000China State Key laboratory of Food Science and Technology Jiangnan UniversityWuxi 214122China Wens Foodstuff Co. Ltd.Yunfu 527400China

The sensory perception of food is a dynamic process,which is closely related to the release of flavor substances during oral ***’s not only affected by the food material,but also subjected to the individual oral *** explore the oral processing characteristics of soft-boiled chicken,the sensory properties,texture,particle size,viscosity,characteristic values of electronic nose and tongue of different chicken samples were *** correlation analysis showed that the physical characteristics especially the cohesiveness,springiness,resilience of the sample determined oral processing *** addition of chicken skin played a role in lubrication during oral *** particle size of the bolus was heightened at the early stage,and the fluidity was enhanced in the end,which reduced the chewing time to the swallowing point and raised the aromatic compounds signal of electronic *** the effect of chicken skin on chicken thigh with relatively high fat content,was opposite in electronic nose,which had a certain masking effect on the perception of umami and sweet *** conclusion,fat played a critical role in chicken oral processing and chicken thigh had obvious advantages in comprehensive evaluation of soft-boiled chicken,which was more popular among people.

关键词： Oral processing Chicken Electronic tongue Electronic nose

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Parboiled rice supplementation alleviates high-fat diet-induced hyperlipidemia by regulating genes and gut microbiota in mice

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Food Science and Human Wellness 2024年第3期13卷 1422-1438页

作者： Xiuxiu Wu Tianyi Guo Biao Li Shuai Han Zuomin Hu Yi Luo Dandan Qin Yaping Zhou Feijun Luo Qinlu Lin National Research Center of Rice Deep Process and Byproducts Hunan Provincial Key Laboratory of Grain-oil Deep Process and Quality ControlHunan Provincial Key Laboratory of Forestry Edible Resources Safety and ProcessingCentral South University of Forestry and TechnologyChangsha 410004China College of Life Science and Technology Central South University of Forestry and TechnologyChangsha 410004China Department of Clinical Medicine Medical College of XiangyaCentral South UniversityChangsha 410008China

Dietary parboiled rice(PR)has a low risk of disease,but little is known about the contribution of PR to the prevention of *** potential role and underlying mechanisms of PR in hyperlipidemia were evaluated in this *** C57BL/6J mice were fed with a normal diet,high-fat diet(HFD)containing refined rice(HFDRR)or PR(HFDPR).It was found that PR intervention improved lipid accumulation in *** data analysis revealed that 27 genes were up-regulated(mostly involved in lipid breakdown)and 86 genes were down-regulated(mostly involved in inflammatory responses)in the HFDPR group compared to the HFDRR *** 15 differentially expressed genes(DEGs)were validated by quantitative real-time PCR(RT-qPCR),while protein interaction network showed that protein tyrosine phosphatase receptor type C(PTPRC)has a central *** gut microbiota of mice was also altered after different dietary treatments,with higher ratio of Firmicutes and Bacteroidetes,increased abundances of Ruminococcaceae,Lachnospiraceae,Christensenellaceae,Porphyromonadaceae,Rikenellaceae and Prevotellaceae,and decreased abundances of Lactobacillaceae,Peptostreptococcaceae,Erysipelotrichaceae and Actinobacteria in the HFDRR *** addition,it was observed that PPAR signaling pathway may act as a bridge between DEGs and differential gut *** results suggested that PR can prevent hyperlipidemia by modulating liver genes and gut microbiota.

关键词： Parboiled rice Blood lipids Transcriptome Gut microbiota PPAR Signaling pathway

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Bioactive peptides alleviating oxidative stress-associated diseases by targeting the Nrf2 signaling pathway

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Food Science and Human Wellness 2024年

作者： Dandan Qin Zuomin Hu Shuai Han Yi Luo Feiyan Yang Tiantian Xie Feijun Luo Hunan Key laboratory of Grain-oil Deep Process and quality control， Hunan Key laboratory of Forestry Edible Resources Safety and Processing， College of Food Science and Engineering， Central South university of Forestry and Technology Department of Gastroenterology， Xiangya Hospital， Central South university

Oxidative stress is caused by an imbalance of the antioxidant defense system and excessive production of free radicals， which can damage biological macromolecules such as proteins， lipids and nucleic acids， which can cause aging， ischemia-reperfusion injury， inflammatory injury， liver and kidney injury and other diseases. The nuclear factor erytheroid-2-related factor 2 (Nrf2) is a major regulator of redox balance. The Nrf2 pathway also exerts a central function in cell apoptosis， oxidative stress damage and metabolic diseases. Bioactive peptides are small molecular peptides composed of amino acid residues. They have many biological activities and play important physiological roles in human body. Antioxidant peptide is a kind of peptide which can reduce oxidative stress damage. They are safe， non-toxic and easily absorbed. In this review， we summarized the mechanism of bioactive peptides in regulating oxidative stress， especially antioxidant peptides， through regulating the Nrf2 signaling pathway and the expressions of oxidative stress-related genes， to alleviate oxidative stress-induced damage. The paper will provide valuable reference to investigators in the antioxidant peptide field and also promote the applications of antioxidant peptides in the oxidative stress-associated diseases.

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Paper-based biosensors based on multiple recognition modes for visual detection of microbially contaminated food

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未来食品学报(英文) 2024年第1期4卷 61-70页

作者： Jie Li Keren Chen Yuan Su Longjiao Zhu Hongxing Zhang Wentao Xu Xiangyang Li Beijing laboratory of Food quality and Safety Beijing Key Laboratory of Agriculraral Product Detection and Control of Spoilage Organisms and Pesticide ResidueFaculty of Food Science and EngineeringBeijing University of AgricultureBeijing 102206China Department of Munition and Health Instirure of Munition and HealthChina Agricultural UniversityBeijing 100191China

Microbially contaminated food can cause serious health hazards and economic losses,therefore sensitive,rapid,and highly specific visual detection is called *** detection of microorganisms is complex and time-consuming,which cannot meet current testing *** emergence of paper-based biosensors provided an effective method for efficient and visual detection of microorganisms,due to its high speed,all-in-one device,low cost,and *** review focused on 5 biomarkers,namely nucleic acids,proteins,***,and the whole microorganism of ***,the recognition methods were summed up in 5 forms,including immunological recognition,aptamer recognition,nucleic acid amplification-mediated *** recognition and clustered regularly interspaced short palindromic repeats mediated *** addition,we summarized the applications of paper-based biosensors in the detection of microorganisms *** the exploration of different biomarkers,identification methods,and applications,we hope to provide a reference for the development of paper-based biosensors and their application in safeguarding the food chain.

关键词： Paper-based biosensor Microorganism Multiple recognition Biomarker Visual detection

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