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Physiological Mechanism of Exogenous selenium in Alleviating Mercury Stress on Pakchoi(Brassica campestris L.)

Phyton-International Journal of Experimental Botany 2024年第5期93卷 951-962页

作者： Chengxu Qian Qiangwen Chen Leiyu Jiang Xiaoyan Yang Shen rao Weiwei Zhang Feng Xu College of Horticulture and Gardening Yangtze UniversityJingzhou434025China Enshi se-run Material Engineering Technology Co. Ltd.Enshi445000China Henry Fok School of Biology and agricultural Shaoguan UniversityShaoguan512005China national r&d for se-rich agricultural products processing Technology Wuhan Polytechnic UniversityWuhan430023China

The objective of this study was to explain the physiological mechanisms through which Na_(2)seO_(3) mitigates the growth and developmental inhibition of pakchoi under HgCl_(2)stress.The results showed that treatment with HgCl_(2)(40 mg L^(−1))led to reduced biomass,dwarfing,root shortening,and root tip necrosis in pakchoi.Compared to control(CK),the activities of superoxide dismutase(SOd)and peroxidase(POd)in Hg treatment increased,and the content of malondialdehyde(MdA)also dramatically increased,which negatively impacted the growth of pakchoi.Low concentrations of Na_(2)seO_(3)(0.2 mg L^(−1))significantly increased the content of soluble sugars compared with control,while chlorophyll,soluble proteins,free amino acids,and vitamin C had no significant changes.The results of the mixed treatments with HgCl_(2)and Na_(2)seO_(3) suggested that selenium may be able to reduce the toxicity of mercury in pakchoi.The biomass,plant height,root length,chlorophyll content,soluble protein,other physiological indicators,and proline showed significant increases compared with the HgCl_(2)treatment.Additionally,the MdA content and mercury accumulation in pakchoi decreased.Our results revealed the antagonistic effects of selenium and mercury in pakchoi.Thus,a theoretical basis for studying pakchoi’s mercuryexcreted and selenium-rich cultivation technology was provided.

关键词： selenium mercury stress pakchoi physiological properties antioxidant enzymes

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review on security defense Technology research in Edge Computing Environment

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Chinese Journal of Electronics 2024年第1期33卷 1-18页

作者： Ke SHANG Weizhen HE Shuai ZHANG national digital Switching System Engineering and Technological r&d center

Edge computing, which achieves quick data processing by sinking data computing and storage to the network edge, has grown rapidly along with the Internet of things. The new network architecture of edge computing brings new security challenges. Based on this, this paper investigates the edge computing security literature published in recent years and summarizes and analyzes research work on edge computing security from different attack surfaces. We start with the definition and architecture of edge computing. From the attack surface between device and edge server, as well as on edge servers, the research describes the security threats and defense methods of edge computing. In addition, the cause of the attack and the pros and cons of defense methods is introduced. The challenges and future research directions of edge computing are given.

关键词： Edge computing security Threat defense Architecture Attack surface

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Combined Promoting Effects of Specific Organic Functional Groups and Alumina Surface Characteristics for the design of a Highly Efficient NiMo/Al_(2)O_(3) Hydrodesulfurization Catalyst

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China Petroleum processing & Petrochemical Technology 2024年第1期26卷 1-11页

作者： Li Huifeng Li Mingfeng Zhang Le Wang Wei Nie Hong national Energy r&d center of Petroleum refining Technology SINOPEC Research Institute of Petroleum Processing Co.Ltd.Beijing 100083China

To prepare a highly efficient NiMo/Al_(2)O_(3) hydrodesulfurization catalyst,the combined effects of specific organic functional groups and alumina surface characteristics were investigated.First,the correlation between the surface characteristics of four different alumina and the existing Mo species states was established.It was found that the Mo equilibrium adsorption capacity can be used as a specific descriptor to quantitatively evaluate the changes in surface characteristics of different alumina.A lower Mo equilibrium adsorption capacity for alumina means weaker metal-support interaction and the loaded Mo species are easier to transform into MoS2.However,the Mo-O-Al bonds still exist at the metal-support interface.The introduction of cationic surfactant hecadecyl trimethyl ammonium bromide(CTAB)can further improve Mo species dispersion through electrostatic attraction with Mo anions and interaction of its alkyl chain with the alumina surface;meanwhile,the introduction of ethylenediamine tetraacetic acid(EdTA)can complex with Ni ions to enhance the Ni-promoting effect on Mo.Therefore,the NiMo catalyst designed using alumina with lower Mo equilibrium adsorption capacity and the simultaneous addition of EdTA and CTAB exhibits the highest hydrodesulfurization activity for 4,6-dimethyl dibenzothiophene because of its proper metal-support interaction and more well-dispersed Ni-Mo-S active phases.

关键词： alumina Mo equilibrium adsorption capacity organic functional groups metal-support interaction hydrodesulfurization

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Effect of sodium starch octenyl succinate-based Pickering emulsion on the physicochemical properties of hairtail myofibrillar protein gel subjected to multiple freeze-thaw cycles

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Food Science and Human Wellness 2024年第2期13卷 1018-1028页

作者： Huinan Wang Jiaxin Zhang Xinran Liu Jinxiang Wang Xuepeng Li Jianrong Li Key Laboratory of Food Nutrition and Safety Ministry of EducationCollege of Food Science and EngineeringTianjin University of Science and TechnologyTianjin 300457China College of Food Science and Technology Bohai UniversityNational R&D Branch Center of Surimi and Surimi Products ProcessingJinzhou 121013China

A Pickering emulsion based on sodium starch octenyl succinate(SSOS)was prepared and its effects on the physicochemical properties of hairtail myofibrillar protein gels(MPGs)subjected to multiple freeze-thaw(F-T)cycles were investigated.The whiteness,water-holding capacity,storage modulus(G')and texture properties of the MPGs were significantly improved by adding 1%-2%Pickering emulsion(Praman spectral analysis demonstrated that Pickering emulsion promoted the transformation of secondary structure,enhanced hydrogen bonds and hydrophobic interactions,and promoted the transition of disulfide bond conformation from g-g-g to g-g-t and t-g-t.At an emulsion concentration of 2%,theα-helix content decreased by 10.37%,while theβ-sheet content increased by 7.94%,compared to the control.After F-T cycles,the structure of the MPGs was destroyed,with an increase in hardness and a decrease in whiteness and water-holding capacity,however,the quality degradation of MPGs was reduced with 1%-2%Pickering emulsion.These findings demonstrated that SSOS-Pickering emulsions,as potential fat substitutes,can enhance the gel properties and the F-T stability of MPGs.

关键词： Pickering emulsion Myofibrillar protein Gel properties Freeze-thaw stability Intermolecular interactions

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Quality Characteristics of Fermented Chili Peppers Using different Inoculated and Natural Fermentation Approaches

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Science and Technology of Food Industry 2024年第12期45卷 129-139页

作者： Zhang, Shiyao Xiao, Yue Wang, Xinyu Chu, Chuanqi Wang, Tao Hu, Xiaosong Yi, Junjie Faculty of Food Science and Engineering Kunming University of Science and Technology Kunming 650500 China Yunnan Engineering research center for Fruit & Vegetable products Kunming 650500 China Green Food processing International Science and Technology r&d center of Kunming City Kunming 650500 China College of Food Science and Nutritional Engineering China Agricultural University Beijing 100083 China

To investigate the effects of different brine and fermentation methods on the quality characteristics of fermented chili peppers, this study employed four different fermentation methods: Natural fermentation with sterile water, co-inoculation fermentation (Lactiplantibacillus plantarum KUST-d1303:Pichia manshurica KUST-F1705=1:1) with sterile water, natural fermentation with aged brine and co-inoculation fermentation with aged brine. The quality characteristics of the fermented chili peppers were compared and analyzed. results showed that compared to other fermentation methods, co-inoculation fermentation with aged brine significantly (P © The Author(s) 2024.

关键词： Fermentation

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Optical sensor array for the discrimination of liquors

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未来食品学报(英文) 2024年第1期4卷 48-60页

作者： Yang Yu Fangfang Shi Yi Zhang Fei Li Jinsong Han State Key Laboratory of Natural Medicines National R&D Center for Chinese Herbal Medicine ProcessingDepartment of Food Quality and SafetyCollege of EngineeringChina Pharmaceutical UniversityNanjing 210009China

The discrimination of liquors plays a vital role in our daily life as a large amount of cheap alcoholic beverages and low-quality counterfeits greatly damage the health of consumers.Array-based optical sensors have been developed as a fast and effective tool to discriminate multi-analytes or complex mixtures with similar structures,such as acids,esters,aldehydes and ketones.Over the past decades,optical sensor arrays have demonstrated remarkable capabilities in fast and accurate detection of diverse types,qualities,and authentic liquors.The identification strategy mainly focuses on the specific/non-specific interactions of flavor compounds in liquors with sensor elements.The cross-reactive optical signal readouts from the combination of sensor elements with liquors and multiple machine learning algorithms are essential to ensure the discriminatory capability of sensing system.In this review,we discuss the advantages and recent advances in pattern recognition of liquors in terms of the design of various types of sensing materials and the construction strategies of sensor arrays.

关键词： sensor array Chemical tongue Chemical nose Liquors Fluorescent Colorimetric Pattern recognition Machine learning algorithm

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Hypoglycemic mechanism of Tegillarca granosa polysaccharides on type 2 diabetic mice by altering gut microbiota and regulating the PI3K-akt signaling pathwaye

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Food Science and Human Wellness 2024年第2期13卷 842-855页

作者： Qihong Jiang Lin Chen rui Wang Yin Chen Shanggui deng Guoxin Shen Shulai Liu Xingwei Xiang College of Food Science and Technology Zhejiang University of TechnologyHangzhou 310014China Key Laboratory of Marine Fishery resources Exploitment&Utilization of Zhejiang Province Hangzhou 310014China national r&d Branch center for Pelagic Aquatic products processing(Hangzhou) Hangzhou 310014China Institute of sericultural and Tea Zhejiang Academy of Agricultural SciencesHangzhou 310021China College of Food and Pharmacy Zhejiang Ocean UniversityZhoushan 316000China

Type 2 diabetes mellitus(T2dM)is a complex metabolic disease threatening human health.We investigated the effects of Tegillarca granosa polysaccharide(TGP)and determined its potential mechanisms in a mouse model of T2dM established through a high-fat diet and streptozotocin.TGP(5.1×10^(3) da)was composed of mannose,glucosamine,rhamnose,glucuronic acid,galactosamine,glucose,galactose,xylose,and fucose.It could significantly alleviate weight loss,reduce fasting blood glucose levels,reverse dyslipidemia,reduce liver damage from oxidative stress,and improve insulin sensitivity.rT-PCr and Western blotting indicated that TGP could activate the phosphatidylinositol-3-kinase/protein kinase B signaling pathway to regulate disorders in glucolipid metabolism and improve insulin resistance.TGP increased the abundance of Allobaculum,Akkermansia,and Bifidobacterium,restored the microbiota abundance in the intestinal tracts of mice with T2dM,and promoted short-chain fatty acid production.This study provides new insights into the antidiabetic effects of TGP and highlights its potential as a natural hypoglycemic nutraceutical.

关键词： Tegillarca granosa polysaccharide Type 2 diabetes mellitus Glycolipid metabolism PI3K/Akt signaling pathway

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revealing the Structure-Property difference of Natural rubber Prepared by different Methods: Protein and Gel Content are Key Factors

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Chinese Journal of Polymer Science 2024年第4期42卷 457-467页

作者： Shao-Qi Huang Jun-Qi Zhang Yong Zhu Ling-Min Kong Lu-Sheng Liao Fu-Quan Zhang Zheng-Tian Xie Jin-rong Wu State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu610065China Hainan Provincial Key Laboratory of Natural rubber processing Agricultural Products Processing Research Institute of Chinese Academy of Tropical Agricultural SciencesZhanjiang524001China

Natural rubber (Nr) is widely used in various fields including aerospace, military industry and transportation due to its superior elasticity and comprehensive mechanical properties. Nonetheless, the commercial Nr prepared by different methods usually exhibits different mechanical properties, primarily due to variations in processing conditions during the conversion from latex to bulk rubber material. Consequently, this poses challenges in scientific research and industrial production of Nr. In order to assess the properties of various commercially available Nr and identify key structural and compositional components, this study systematically compares and analyzes four representative Nr raw materials: air dried sheet (AdS), ribbed smoked sheets (rSS), constant viscidity Nr (CV), and whole field latex rubber (WF). The investigation focuses on evaluating their static mechanical behavior, SIC behavior, wear resistance, and fatigue resistance. The findings indicate that protein and gel content exhibit a crucial influence on the Nr properties. These constituents contribute to the formation of a high-crosslinking density region, generating a heterogeneous network structure within the rubber. This structure amplifies strains during deformation, leading to earlier and stronger strain-induced crystallization (SIC). Among the four commercial Nr brands, rSS demonstrates superior overall mechanical and dynamic properties owing to its high protein and gel content. This study serves as a valuable reference for comprehending the differences in properties among various commercial Nr, thereby offering guidance for the actual processing and selection of Nr.

关键词： Natural rubber processingmethod Protein Gel content Property

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recent Advances in deciphering the Mechanisms and Biological Functions of dNA demethylation

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Chinese Journal of Chemistry 2024年第6期42卷 645-651页

作者： Yang Feng Sheng-Jun Chen Bi-Feng Yuan Key Laboratory of Aquatic Product processing Ministry of Agriculture and Rural AffairsNational R&D Center for Aquatic Product ProcessingSouth China Sea Fisheries Research InstituteChinese Academy of Fishery SciencesGuangzhouGuangdong510300 China School of Public Health Research Center of Public HealthRenmin Hospital of Wuhan UniversityWuhan UniversityWuhanHubei430071 China

5-Methylcytosine (5mC) is a dynamic and reversible epigenetic modification in genomic dNA of higher eukaryotes.It has been well-established that the demethylation of 5mC occurs through the ten-eleven translocation (TET)-mediated oxidation of 5mC followed by thymine dNA glycosylase (TdG)-initiated base excision repair (BEr).recent findings also have identified an alternative pathway of dNA demethylation.In this pathway,TET enzymes directly oxidize 5mC to form 5-formylcytosine (5fC) or 5-carboxylcytosine (5caC).These modified bases can undergo direct deformylation or decarboxylation,respectively.Additionally,dNA demethylation can also occur through the deamination of 5mC and 5hmC,resulting in the production of thymine and 5-hydroxymethyluracil (5hmU),respectively.Various dNA demethylation pathways possess critical functional implications and roles in biological processes.This recent Advances article will focus on the studies of mechanisms and biological functions of dNA demethylation,shedding light on the reversible nature of the epigenetic modification of 5mC.

关键词： Epigenetics dNA dNA methylation 5-Methylcytosine demethylation Mechanisms Biological functions C—C bond cleavage Mass spectrometry

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A review:the mechanism of plant-derived polysaccharides on osteoblasts and osteoclasts

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未来食品学报(英文) 2024年第3期4卷 183-192页

作者： Mengjie ren Adel F.Ahmed Meng Li Menghan Li Zhiruo Yan Jinmei Wang national r&d center for Edible Fungus processing Technology Henan UniversityKaifeng 475004China Joint International research Laboratory of Food&Medicine resource Function Henan ProvinceKaifeng 475004China Medicinal and Aromatic Plants researches department Horticulture Research InstituteAgricultural Research CenterGiza 12511Egypt

Bone loss and deterioration of bone microarchitecture would increase the bone fragility and fracture risk,leading to the osteoporosis.More and more evidences proved that plant-derived polysaccharides could have a remarkable influence on osteoblasts and osteoclasts,exerting anti-osteoporosis effects.According to the previous research,the extract of Cibotium barumoz,Achyranthes bidentata,Curculigo orchioides,Epimedium brevicornum,Angelica sinensis,Polygonatum sibiricum,dendrobium officinale,Morinda officinalis,Nelumbo mucifera,diospyros kaki,Hordeum vulgare,Cistanche deserticola,Commiphora Myrrha and other plant-derived polysaccharides could benefit to the osteoblasts and osteoclasts.The essential mechanisms are mainly related to the activation or inhibition of many factors,including runt-related transcription factor 2(runx2),B-catenin,osterix(Osx),activator protein-1(AP-1),osteocalcin(OCN/BGP),alkaline phosphatase(ALP),osteopontin(OPN),bone morphogenetic protein(BMP),phosphatidylinositol 3-kinase(PI3K)/C-Jun N-terminal kinase(JNK)/extracellular regulated protein kinase(ErK),osteoprotegerin(OPG),receptor activator of nuclear factor-kB(rANK),monocyte/macrophage colony-stimulating factor(M-CSF),tumor necrosis factor receptor-associated factor 6(TrAF-6),receptor activator of nuclear factor(NF)-KB ligand(rANKL),nuclear factor of activated T cells 1(NFATc1),c-Fos,matrix metallopeptidase-9(MMP-9),glycogen synthase kinase 3β(GSK3B)/B-catenin,nuclear factor E2-related factor 2(Nf2),as well as these related pathways,such as Wnt/p-catenin,BMP-2/SMAd1/5/8,PI3K/AKT,OPG/rANKL/rANK,NF-κB,MAPKs,etc.These plant-derived polysaccharides could improve the dynamic balance of bone formation and resorption through promoting the differentiation and maturation of osteoblast or inhibiting its formation.The reviewed plant-derived polysaccharides and their regulating mechanisms on the osteoclasts and osteoblasts provide the evidences for the development of osteoporosis therapeutics.

关键词： Osteoporosis Plant-derived polysaccharides Osteogenesis promotion Osteoclasts inhibition

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