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Characterization of the spoilage strength of Aeromonas app. to collagen-rich chilled meat: comparative analysis

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Food Science and Human Wellness 2024年

作者： junming Gong Liangting Shao Silu liu Xinglian Xu Huhu Wang State Key Laboratory of Meat Quality Control and Cultured Meat Development College of Food Science and Technology Nanjing Agricultural University College of Food Science and Pharmacy Xinjiang Agricultural University

Aeromonas spp. are commonly found in spoilage of chilled meat. Aeromonas salmonicida NCM 29 and Aeromonas salmonicida NCM 57 have been discovered the spoilage heterogeneity in degrading myofibrillar protein. In this study， the two strains were tested to uncover the discrepancy of meat spoilage in collagen-rich chilled meat and extracted collagen. The results revealed that chicken claws， riched in collagen， inoculated with NCM 29 showed higher values of total viable counts (TVC)， total volatile basic nitrogen (TVB-N)， pH， adhered cells， TCA-soluble peptides， and protease activity compared to those inoculated with NCM 57. Furthermore， NCM 29 generated higher quantity of volatile organic compounds related to meat spoilage. The collagenase (hemagglutinin protease， Hap) secreted by NCM 29 has been identified as the key factor responsible for the observed discrepancies in spoilage， which gradually degraded collagen into peptides and hydroxyproline. The capacity of Hap to degrade type I collagen in vitro indicated that it has apparent proteolytic activity， which could reduce the average particle size and alter secondary structure of collagen. SDS-PAGE further confirmed the degradation of the β chain in collagen. These findings not only provide a theoretical basis for in-depth investigation of the meat spoilage mechanisms of Aeromonas spp.， but also encourage us to take measures to avoid the spoilage of related bacteria such as Aeromonas spp. during the preservation process.

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Ferroptosis: A therapeutic opportunity of inflammatory bowel disease

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中华医学杂志(英文版) 2024年第7期137卷 874-876页

作者： Ye Yulin liu Limin Jing Yang Yao Shuangzhe Yang Mo Dai Xin Piao Meiyu Xu Xin Feng Zelin Wang Xiaoli liu Yifei Miao junming Gao Xingjie Yu Qingxiang Cao Xiaocang Department of Gastroenterology and Hepatology Tianjin Medical University General Hospital Tianjin Medical University Tianjin 300070 China Department of Biochemistry and Molecular Biology School of Basic Medical Science

Enhancing the crystallinity and stability of perovskite solar cells with 4-tert-butylpyridine induction for efficiency exceeding 24%

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Journal of Energy Chemistry 2024年第6期93卷 1-7,I0001页

作者： You liu Lishuang Zheng Kuanxiang Zhang Kun Xu Weicheng Xie Jue Zhang Yulu Tian Tianyuan liu Hanzhong Xu Ruoming Ma Wei Huang Jiahui Chen Jusheng Bao Chen Chen Yongsheng Zhou Xuchun Wang junming Chen Jungan Wang College of Chemistry and Materials Engineering Anhui Science and Technology UniversityBengbu 233000AnhuiChina Anhui Province Quartz Sand Purification and Photovoltaic Glass Engineering Research Center Chuzhou 233100AnhuiChina Triumph Photovoltaic Materials Co.Ltd BengbuAnhuiChina National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210009JiangsuChina JinkoSolar Holding Co.Ltd HainingZhejiangChina

Perovskite solar cells(PSCs)have emerged as a promising photovoltaic technology because of their high light absorption coefficient,long carrier diffusion distance,and tunable bandgap.However,PSCs face challenges such as hysteresis effects and stability issues.In this study,we introduced a novel approach to improve film crystallization by leveraging 4-tert-butylpyridine(TBP)molecules,thereby enhancing the performance and stability of PSCs.Our findings demonstrate the effective removal of PbI_(2)from the perovskite surface through strong coordination with TBP molecules.Additionally,by carefully adjusting the concentration of the TBP solution,we achieved enhanced film crystallinity without disrupting the perovskite structure.The TBP-treated perovskite films exhibit a low defect density,improved crystallinity,and improved carrier lifetime.As a result,the PSCs manufactured with TBP treatment achieve power conversion efficiency(PCE)exceeding 24%.Moreover,we obtained the PCE of 21.39%for the 12.25 cm^(2)module.

关键词： 4-tert-butylpyridine Film crystallization Perovskite solar cells Power conversion efficiency Stability improvement

RNA ac^(4)C modification in cancer biology:from regulatory mechanisms to clinical applications

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Science China(Life Sciences) 2024年第4期67卷 832-835页

作者： Lijun Tao Yunqing Lu Zhuojia Chen Lichen Ge junming He Jianxin Peng Hongsheng Wang School of Pharmaceutical Sciences Sun Yat-sen UniversityGuangzhou 510006China Sun Yat-sen University Cancer Center State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou 510060China Department of Hepatobiliary Surgery Guangdong Province Traditional Chinese Medical HospitalGuangzhou 510120China

关键词： clinical (4) modification

Low-carbon development policies and achievements in the context of the livestock sector in China

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Frontiers of Agricultural Science and Engineering 2024年第3期11卷 367-380页

作者： Sha WEI junming FAN Yanfeng TIAN Hongmin DONG Institute of Environmental and Sustainable Development in Agriculture Chinese Academy of Agriculture Sciences Inner Mongolia You Ran Dairy Co. Ltd.

Rapid growth and a vast transition of Chinese livestock industry driven by economic incentives make it become an important contributor on climate change over the last four decades. This study first analyzes the evolving lowcarbon livestock development policies and regulations, then an assessment and explanations of the achievements and non-achievements are provided.The findings reveal that China began to pay attention to low-carbon development policy starting in the early 1990s. However, only after the cyclic and green concept became the main sustainable development policy, China began to move seriously toward low-carbon livestock development. Several policy instruments were introduced, including moderate scale, feed optimization, manure resource utilization, facility and equipment allocation rate, energy conservation and substitution. Overall, achievements were made in introducing such policies. However, due to the large share of standard agriculture and regional resources, and environmental diversity, such policies may have little effect in practice. The divergence between the policies and actual practices are explained, and important policies applicable to all developing countries are also recommended.

关键词： Low carbon livestock development policy recommendations divergence carbon market

Selective oxygen electroreduction to hydrogen peroxide in acidic media:The superiority of single-atom catalysts

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Nano Research 2024年第6期17卷 4668-4681页

作者： Ergui Luo Tongtong Yang Jingyi Liang Yuhong Chang junming Zhang Tianjun Hu Junjie Ge Jianfeng Jia Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education School of Chemistry and Materials ScienceShanxi Normal UniversityTaiyuan 030032China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Electroanalytic Chemistry Jilin Province Key Laboratory of Low Carbon Chemistry PowerChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

Two-electron oxygen reduction reaction(2e-ORR)provides an environmentally friendly direction for the on-site production of hydrogen peroxide(H_(2)O_(2)).Central to this technology is the exploitation of efficient,economical,and safe 2e-ORR electrocatalysts.This overview starts with the fundamental chemistry of ORR to highlight the decisive role of adsorbing intermediates on the reaction pathway and activity,followed by a comprehensive survey of the tuning strategies to favor 2e-ORR on traditional precious metals.The latest achievements in designing efficient and selective precious-metal-based single-atom catalysts(SACs)and metal-nitrogen-carbon(M-Nx/C)catalysts,from the aspects of material synthesis,theoretical calculations,and mass transport promotion,are systematically summarized.Brief introductions on the evaluation metrics for 2e-ORR catalysts and the primary reactor designs for cathodic H_(2)O_(2)synthesis are also included.We conclude this review with an outlook on the challenges and direction of efforts to advance electrocatalytic 2e-ORR into realistic H_(2)O_(2)production.

关键词： oxygen reduction reaction H_(2)O_(2)production single-atom catalysts selectivity

Nonlinear Dynamics of Phase Separation in CuCo Alloys

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Chinese Physics Letters 1994年第10期11卷 634-637页

作者： liu junming liu Zhiguo WU Zhuangchun National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210008

The dynamics of phase separation of CuCo alloys has been studied by numerically solving the nonlinear Cahn-Hilliard equation including thermal noises.The simulations show that phase separation of the alloys within the metastable region is attributed to the composition fluctuations including thermal noises.The present modeling makes it possible to describe the growth and coarsening as concomitant processes.

关键词： alloys separation metastable

Experimental Study on Friction Reducing and Anti Wear Property of a Water-Based Lubricant with Polyether Added

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稀有金属材料与工程 2012年第S1期41卷 276-279页

作者： Zhang Chaohui liu Sisi liu junming Beijing Jiaotong Univ Sch Mech Elect & Control Engn Beijing 100044 Peoples R China

The wear behaviors of steel-steel pair on condition of a water-based lubricant with copolymer of acylamino polyoxyethylene polyoxypropylene ether(KE-1)included as additives are investigated with the help of the universal micro-tribotester.Tests on friction and wear are carried out.As a reference,some tests with pure water are also performed for comparison.The results show that the prepared water-based lubricant has a good effect on the characteristics associated with friction reducing and anti-wear processes,which lay some credence to its utilization in practical industrial tribo-systems.

关键词： acylamino-polyoxyethylene-polyoxypropylene-ether water-based lubricant anti-wear property

RNA acC modification in cancer biology: from regulatory mechanisms to clinical applications

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Science China Life Sciences 2024年

作者： Lijun Tao Yunqing Lu Zhuojia Chen Lichen Ge junming He Jianxin Peng Hongsheng Wang School of Pharmaceutical Sciences Sun Yat-sen University Sun Yat-sen University Cancer Center State Key Laboratory of Oncology in South China Collaborative Innovation Center for Cancer Medicine Department of Hepatobiliary Surgery Guangdong Province Traditional Chinese Medical Hospital

RNA modifications are increasingly recognized for their significance in diverse physiological and pathological processes,with over 170 types of chemical modifications having been discovered since the1960s. Among these modifications, N4-acetylcytidine(ac4C) is the first acetylated modification identified on eukaryotic RNAs, previously reported in transfer RNA(tRNA) and ribosomal RNA(rRNA),and subsequently found in messenger RNA(mRNA). At present, the methods reported for detecting ac4C modification encompass borohydride-based Sanger sequencing, LC-MS/HPLC-MS, HPLC-CE,acRIP-seq, affinity reagents in vitro transcription(IVT), and more(Jin et al.,2020). The N4 position of cytosine can be acetylated by ac4C “writer”, with Nacetyltransferase 10(NAT10) currently recognized as the sole enzyme responsible for ac4C acetylation. Figure 1 illustrates the biological roles and related mechanisms of ac4C modification in various cancers. Collectively, ac4C modification can regulate various aspects of tumor biology, including proliferation, metastasis, metabolism, drug resistance, ferroptosis and apoptosis, by influencing RNA stability and translation. This ultimately contributes to tumor development.

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