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Estimate of Hydrofluorocarbon Emissions for 2012–16 in the Yangtze River Delta, China

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Advances in Atmospheric Sciences 2020年第6期37卷 576-585页

作者： Jingjiao PU Honghui XU Bo YAO Yan YU yujun jiang Qianli MA Liqu CHEN Zhejiang Meteorological Science Institute Hangzhou 310008China Meteorological Observation Center of China Meteorological Administration Beijing 100081China Zhejiang Lin'an Atmospheric Background National Observation and Research Station Hangzhou 311307China

Hydrofluorocarbons(HFCs)have been widely used in China as substitutes for ozone-depleting substances,the production and use of which are being phased out under the Montreal *** is a major consumer of HFCs around the world,with its HFC emissions in CO2-equivalent contributing to about 18%of the global emissions for the *** methods are widely used to estimate the emissions of HFCs-namely,the bottom-up method,top-down method and tracer ratio *** this study,the tracer ratio method was adopted to estimate HFC emissions in the Yangtze River Delta(YRD),using CO as a *** YRD region might make a significant contribution to Chinese totals owing to its rapid economic *** flask measurements for ten HFCs(HFC-23,HFC-32,HFC-125,HFC-134 a,HFC-143 a,HFC-152 a,HFC-227 ea,HFC-236 fa,HFC-245 fa and HFC-365 mfc)were conducted at Lin’an Regional Background Station in the YRD over the period 2012-16,and the HFC emissions were 2.4±1.4 Gg yr-1 for HFC-23,2.8±1.2 Gg yr-1 for HFC-32,2.2±1.2 Gg yr-1 for HFC-125,4.8±4.8 Gg yr-1 for HFC-134 a,0.9±0.6 Gg yr-1 for HFC-152 a,0.3±0.3 Gg yr-1 for HFC-227 ea and 0.3±0.2 Gg yr-1 for HFC-245 *** YRD total HFC emissions reached 53 Gg CO2-e yr-1,contributing 34%of the national *** per capita HFC CO2-equivalent emissions rate was 240 kg yr-1,while the values of per unit area emissions and per million GDP emissions reached 150 Mg km-2yr-1 and 3500 kg yr-1(million CNY GDP)-1,which were much higher than national or global levels.

关键词： Yangtze Delta emissions

Lactobacillus plantarum J26 alleviates alcohol-induced oxidative liver injury by regulating the Nrf2 signaling pathway

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Food Science and Human Wellness 2024年第4期13卷 2068-2078页

作者： Hongxuan Li Shasha Cheng Yuhong Wang Yilin Sun Jiaxin Zhang Mingshuang Sun Chaoxin Man Yu Zhang yujun jiang Key Laboratory of Dairy Science Ministry of EducationCollege of Food Science and EngineeringNortheast Agricultural UniversityHarbin 150030China

Oxidative stress is one of the main ways to cause alcohol-induced liver injury,and alcoholic liver disease(ALD)has been a common health problem *** acid bacteria(LAB)is also considered as a potential treatment to alleviate alcohol-induced liver *** plantarum J26 is a LAB isolated from Chinese traditional fermented dairy products with excellent probiotic *** study aimed to establish a mice model of alcoholic liver injury through acute-on-chronic alcohol feeding and to study the alleviating effect of pre-intake of *** J26 on alcohol-induced oxidative liver injury and focus on its potential mechanism of alleviating *** results showed that pre-intake of *** J26 could improve liver pathological changes,reduce lipid accumulation,increase mitochondrial ATP and mitochondrial(mtDNA)levels,and alleviate liver *** addition,pre-intake *** J26 can improve the level of short-chain fatty acids(SCFAs)in the intestines in mice,short chain fatty acids can be used as a signaling molecule activation of nuclear factor E2-related factor 2(Nrf2)signaling pathway to alleviate liver oxidative stress,and maintain mitochondrial homeostasis by regulating the expression of genes related to mitochondrial dynamics and autophagy,thereby reducing cell apoptosis to alleviate alcohol-induced oxidative liver injury.

关键词： Alcoholic liver disease Probiotics Nuclear factor E2-related factor 2(Nrf2) Oxidative stress Short-chain fatty acids

Discussion on performance evaluation method of enterprise contribution degree

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International English Education Research 2017年第5期 81-82页

作者： jiang He jiang yujun University of Science and Technology Liaoning college of business administrationAnshanLiaoning 114051

As competition intensifies, many companies are exploring new ways of performance appraisal. This paper analyzes the scientificity, rationality, and feasibility of the contribution method of the project as a unit, and ... 详细信息

关键词： contribution degree performance assessment method

Cloning of Bile Salt Hydrolase Gene and Its Expression in Lactic Acid Bacteria

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Journal of Northeast Agricultural University(English Edition) 2011年第2期18卷 48-53页

作者： LI Bin jiang yujun College of Life Sciences Northeast Agricultural University Harbin 150030 China Key Laboratory of Dairy Science Ministry of Education College of Food Northeast Agricultural University Harbin 150030 China

According to the sequence of the bile salt hydrolase （BSH） gene of Bifidobacterium and the restriction enzyme cutting sites of expression vector pNZ8148, primers were designed and the bile salt hydrolase （BSH） gene was gotten from Bacillus bifidus ATCC 29521 by PCR. BSH gene was inserted into lactic acid bacteria expression vector pNZ8148 to construct the recombinant pNZ8148-BSH. The recombinant pNZ8148-BSH was transferred into lactic acid bacteria NZ9000 with electrotransformation method. And the recombinant which could express BSH protein was obtained. It was identified by SDS-PAGE electrophoresis and activity verification. The result could provide a rationale reference for expressing BSH in lactic acid bacteria.

关键词： bile salt hydrolase lactic acid bacteria gene cloning identification recombinant expression

Heat-killed Lactobacillus paracasei JY56 can relieve ovalbumin-induced food allergy via regulating immuno-inflammatory responses and gut microbiota

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Food Science and Human Wellness 2024年

作者： Miao Zheng Ming Ma Ruxue Fang Yilin Sun Xinyan Yang Chaoxin Man Qianyu Zhao yujun jiang Key Lab of Dairy Science， Ministry of Education， College of Food Science， Northeast Agricultural University

Food allergy (FA) is an aberrant immune response triggered by the ingestion of a food antigen. Ovalbumin (OVA)-sensitized and challenged BALB/c mice were orally administered heat-killed (HK)-L. paracasei JY56. In this work， HK-L. paracasei JY56 alleviated the FA-induced decrease in body weight and rectal temperature and reduced the allergy score. Serum analysis showed that HK-L. paracasei JY56 reduced the levels of specific antibodies (OVA-sIgE and OVA-sIgG) and allergic mediators (histamine and mast cell protease) in FA mice. In addition， HK-L. paracasei JY56 also could alleviate OVA-induced FA by suppressing Th2 and Th17-type immune responses， which was evidenced by the regulation of splenic lymphocyte subpopulations and associated cytokine secretion. Moreover， jejunal histological analysis and intestinal barrier function related gene expression measurement were performed to verify the intestinal barrier repair of HK-L. paracasei JY56. Meanwhile， the TLR4/NF-κB inflammatory pathway activation was inhibited by HK-L. paracasei JY56 at gene and protein levels. Finally， HK-L. paracasei JY56 was performed to modulate the gut microbiota structure and increase the levels of short-chain fatty acids. In conclusion， HK-L. paracasei JY56 could alleviate OVA-induced FA in multiple ways， and this study provides a theoretical basis for the application of inactivated probiotics in functional foods for FA.

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Desiccation and osmotic resistance mechanism of Cronobacter spp. isolated from powdered infant formula

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Food Science and Human Wellness 2024年

作者： Shiqian Fu Danliangmin Song Xue Qin Lihan Wang Qianyu Zhao Chaoxin Man Xinyan Yang yujun jiang Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province， Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition， College of Food and Pharmaceutical Sciences， Ningbo University Key Laboratory of Dairy Science， Ministry of Education， Department of Food Science， Northeast Agricultural University

Cronobacter spp. has strong resistance to desiccation and high permeability in Enterobacteriaceae， and powdered infant formula (PIF) is one of the main contamination routes. In recent years， the contamination of Cronobacter spp. in PIF incidents occur from time to time， causing infant serious diseases or death. In this investigation， matrix-assisted laser desorption/ionization time of flight mass spectrometry was used to identify the phenotypes of 35 Cronobacter strains isolated from PIF and its processing environment. Subsequently， the isolates were evaluated for drying and osmotic pressure tolerance. The results showed that the deactivation rate of the strains ranged from 9.01% to 77.57%， and the highest osmotic pressure condition the strains could tolerate was 6% NaCl. In addition， there was a positive correlation between biofilm formation ability and desiccation resistance. Combined with transcriptomics， Cronobacter spp. can activate biofilm synthesis， produce more trehalose， accumulate betaine and electrolytes to stabilize intracellular structure under the two treatment conditions. 31 and 43 genes were found related to desiccation and permeability resistance， respectively. And some genes (cysM， thuF， ycjO， et al) were found to be associated with two tolerances for the first time.

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Branched-chain fatty acids from goat milk alleviate ulcerative colitis via the TLR4/NF-κB/NLRP3 pathway

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Food Science and Human Wellness 2024年第6期13卷 3624-3632页

作者： Jiaxin Zhang Jinjing Zhong Zhengying Cui Yu Shen Yaping Zheng Yu Zhang Chaoxin Man Yanmei Hou Qianyu Zhao yujun jiang Key Laboratory of Dairy Science Ministry of EducationDepartment of Food ScienceNortheast Agricultural UniversityHarbin 150030China Hyproca Nutrition Co. Ltd.Changsha 410000China

Branched-chain fatty acids(BCFAs)are new bioactive fatty acids with anti-inflammatory ***,the role of BCFAs in alleviating ulcerative colitis has not been ***,we evaluated the protective effect of BCFAs from goat milk in mice with colitis induced using dextran sodium sulfate(DSS)and explored the corresponding *** results show that BCFAs extracted from goat milk can significantly alleviate weight loss in mice,and reduce the disease activity index and the activity of myeloperoxidase while increasing the content of antioxidant enzymes in colon tissue and reducing the oxidation stress *** data also show that BCFAs can down-regulate the gene and protein expression of the toll-like receptor 4(TLR4)/nuclear factorκB p65(NF-κB p65)/NOD-like receptor thermal protein domain associated protein 3(NLRP3)signaling pathway,and at the same time significantly reduce the expression of pro-inflammatory factors tumor necrosis factorα(TNF-α),interleukin 1β(IL-1β),and IL-18 in colon tissue,and significantly increase the expression of the anti-inflammatory factor *** conclusion,these results demonstrated that BCFAs in goat milk exerted effects on colitis-related inflammatory cytokines and inhibited inflammation by inducing the TLR4/NF-κB/NLRP3 pathway to alleviate DSS-induced ulcerative *** study provides evidence for the potential of BCFAs as bioactive fatty acids in food products and to ameliorate ulcerative colitis development in mice.

关键词： Goat milk Ulcerative colitis Branch-chain fatty acids TLR4/NF-κB/NLRP3 pathway

Research Advances in the Immunomodulatory Mechanisms of Probiotics on Non-Specific and Specific Immunity

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Food Science and Human Wellness 2024年

作者： Haijie Zhao Hongxuan Li Yiqing Zhao Tong Wu Yiling Deng Yanmei Hou Wei Zhang Chaoxin Man Yu Zhang Qianyu Zhao yujun jiang Key Laboratory of Dairy Science， Ministry of Education， College of Food Science and Engineering， Northeast Agricultural University

Probiotics can regulate the body's immune system through both non-specific and specific immunity， thereby regulating host health. In terms of non-specific immune regulation， probiotics can activate the intrinsic immune system， regulate the mucosal barrier function， and play an immune role by influencing the activity of intrinsic immune cells such as macrophages， dendritic cells and natural killer cells， as well as their differentiation and maturation; in terms of specific immune regulation， probiotics play a role in regulating the immunoglobulin level and the maturation of B cells. Probiotics can also regulate T-cell differentiation according to the condition of the body， thus regulating specific immunity. Many studies have focused on the role of probiotics in metabolism and nutrition， and the mechanisms involved in the immunomodulatory role of probiotics have only been partially described. This review summarises the role of common probiotics such as Lactobacillus plantarum and Lactobacillus rhamnosus in immunomodulation as well as their mechanisms， describing the currently known mechanisms of immunomodulation by probiotics in improving the host immune system. A deeper understanding of probiotics and their specific mechanisms of action will facilitate the use of probiotics for immunomodulation in clinical medicine， functional foods， and other areas. This will also contribute to the development and research of engineered probiotics， next-generation probiotics， and other new functional probiotics with immunomodulatory effects.

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MMA-co-GMA增容PBAT/PLA共混材料结构与性能

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塑料工业 2023年第11期51卷 141-147页

作者：姜玉骏孙树林长春工业大学化学工程学院高分子材料与工程系吉林长春130012 长春工业大学教育部合成树脂与特种纤维工程研究中心吉林长春130012

利用甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯无规共聚物(MG)为相容剂,采用熔融共混法制备了聚对苯二甲酸-己二酸丁二醇酯(PBAT)和聚乳酸(PLA)生物降解共混材料。MG中的环氧官能团与PBAT和PLA中的端基之间的增容反应生成PBAT-co-MG-co-PLA... 详细信息

利用甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯无规共聚物(MG)为相容剂,采用熔融共混法制备了聚对苯二甲酸-己二酸丁二醇酯(PBAT)和聚乳酸(PLA)生物降解共混材料。MG中的环氧官能团与PBAT和PLA中的端基之间的增容反应生成PBAT-co-MG-co-PLA大分子相容剂提高二者之间的相容性。MG的加入导致PLA相的最大分解速率温度明显向高温方向移动,耐热性提高,而PBAT相最大分解速率温度几乎没有变化。MG的增容作用促进了PBAT相的均匀分散、较小的粒子尺寸和窄的分布。动态流变测试结果表明,PBAT/PLA/MG共混材料比PBAT/PLA共混物具有更高的复数黏度和储能模量,增容反应增加了界面相互作用和熔体强度。同PBAT/PLA共混材料相比,MG的增容作导致PBAT/PLA/MG共混物表现出更高的冲击韧性、断裂伸长率和拉伸强度。

关键词：聚对苯二甲酸-己二酸丁二醇酯聚乳酸甲基丙烯酸甲酯-甲基丙烯酸缩水甘油酯共聚物增容作用结构与性能