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Ecological Network Resilience of Shiyang River Basin: An Arid Inland Watershed of Northwest China

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Chinese Geographical science 2024年第5期34卷 951-966页

作者： HE Yangxi LIU Chunfang NI Bowen LIAN Hugang School of Management Northwest Normal UniversityLanzhou 730070China Research Center of Land Use and Comprehensive Improvement Engineering of Gansu province Lanzhou 730070China

Due to the uncertainties posed by climate change,resilience has become an increasingly important variable for evaluating regional ecosystem *** assessment of Ecological Network Resilience(ENR)is crucial for establishing mitigation strategies and sustainable socioeconomic development in arid *** River Basin is an arid watershed in Northwest China with complex characteristics,its ENR and spatial differentiation characteristics in 2020 were investigated in this work based on the Complex Adaptive System(CAS)*** results indicated that the mean Ecological Network Resilience Index(ENRI)value for the Shiyang River Basin was 0.390 in 2020,and the mean values in the southern mountainous,middle oasis,and northern desert regions of the basin were 0.598,0.461,and 0.237,respectively,demonstrating evident spatial ***,the ENR of the basin exhibited distinct distribution characteristics across different dimension,whereas the trend of the integrated ENR of the basin was consistent with that of elemental,structural,and functional resilience,indicating the constructed three-region ENR model based on the logical relationship of element-structure-function was suitable for evaluation of the ENR in arid inland river ***,strategies for enhancing regional ENR were proposed from the perspective of adapting to climate change.

关键词： Ecological Network Resilience(ENR) Complex Adaptive System(CAS) element-structure-function Shiyang River Basin Northwest China

Stability and transepithelial transport of oligopeptide(KRQKYD)with hepatocyte-protective activity from Jinhua ham in human intestinal Caco-2 monolayer cells

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Food science and Human Wellness 2024年第3期13卷 1503-1512页

作者： Wen Nie Feiran Xu Kai Zhou Jieying Deng Ying Wang Baocai Xu Engineering Research Center of Bio-process Ministry of EducationSchool of Food and Biological EngineeringHefei University of TechnologyHefei 230601China School of Biological and Food Engineering Chuzhou UniversityChuzhou 239001China

The study evaluated the stability of an oligopeptide(Lys-Arg-Gln-Lys-Tyr-Asp,KRQKYD)and its transport mechanism by simulating gastrointestinal digestion and a model of human intestinal Caco-2 monolayer cells in *** this study,the effects of environmental factors(temperature,pH and NaCl concentration)and simulated gastrointestinal digestion on the stability of KRQKYD were evaluated by indicators of the levels of alanine transaminase(ALT),aspartate transaminase(AST)and malondialdehyde(MDA)in an alcoholinduced hepatocyte injury *** results showed that KRQKYD still maintained satisfactory hepatocyteprotective activity after treatment with different temperatures(20-80℃),pH(3.0-9.0),NaCl concentration(1%-7%)and simulated gastrointestinal digestion,which indicated that KRQKYD showed good stability to environmental factors and simulated gastrointestinal ***,the intact KRQKYD could be absorbed in a model of Caco-2 monolayer cells with a P_(app)value of(9.70±0.53)×10^(-7)cm/*** with an energy inhibitor(sodium azide),a competitive peptide transporter inhibitor(Gly-Pro)and a transcytosis inhibitor wortmannin did not decrease the level of transepithelial KRQKYD transport,indicating that the transport mechanism of KRQKYD was not associated with energy dependent,vector mediated and *** tight junction disruptor cytochalasin D significantly increased the level of transepithelial KRQKYD transport(P<0.05),suggesting that intact KRQKYD was absorbed by paracellular transport.

关键词： Jinhua ham KRQKYD(Lys-Arg-Gln-Lys-Tyr-Asp) Environmental stability Gastrointestinal digestive Transport mechanism

First results of CO_(2) dispersion interferometer on EAST tokamak

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Plasma science and technology 2024年第3期26卷 76-82页

作者：刘郁阳李维明姚远张耀张家敏连辉洪博王守信揭银先刘海庆 Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People's Republic of China University of science and technology of China Hefei 230026People's Republic of China Institutes of Physical science and Information technology Anhui UniversityHefei 230031People's Republic of China

A dispersion interferometer(DI)has been installed and operates on the Experimental Advanced Superconducting Tokamak(EAST).This DI system utilizes a continuous-wave 9.3μm CO_(2)laser source to measure line-averaged electron densities *** contrast to conventional interferometers,the DI does not require substantial vibration isolations or compensating systems to reduce the impact of vibrations in the optical *** also employs a ratio of modulation amplitudes,ensuring it remains immune to the variations in detected *** a variation compensation system,the DI system on EAST reaches a density resolution of less than1.8×10^(-2)πrad and a temporal resolution of 20μ*** measurements made by the POlarimeterINTerferometer(POINT)system and the far-infrared hydrogen cyanide(HCN)interferometer are remarkably consistent with the DI’s *** possibility of fringe jumps and the impact of refraction in high-density discharge can be significantly decreased using a shorter wavelength laser source.A rapid density change of 3×10^(19)m^(-3)during 0.15 s has been measured accurately in shot No.114755 of ***,the DI system demonstrates dependability and stability under 305 s long-pulse discharges in shot No.122054.

关键词： dispersion interferometer(DI) electron density plasma diagnostics Experimental Advanced Superconducting Tokamak(EAST)

Goaf risk prediction based on IAOA-SVM and numerical simulation:A case study

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Underground Space 2024年第2期15卷 153-175页

作者： Mingliang Li Kegang Li Yuedong Liu Shunchuan Wu Qingci Qin Rui Yue Faculty of Land Resources Engineering Kunming University of Science and TechnologyKunming 650093China Yunnan Key Laboratory of Sino-German Blue Mining and Utilization of special Underground Space Kunming 650093China Yunnan Diqing Mining Co.Ltd. Shangrila 674400China

In regard to goaf risk prediction,due to the low accuracy and single prediction method,this study proposes a method that combines the improved arithmetic optimization algorithm(IAOA)–support vector machines(SVM)with GoCAD–FLAC^(3D)numerical ***,goaf risk is comprehensively *** the perspectives of geological and engineering conditions,eight factors that affect goaf stability and 176 sets of sample data were *** utilized eight influencing factors such as rock mass structure,geological structure,and goaf burial depth as inputs,and the goaf risk level as the ***,an IAOA–SVM goaf risk prediction model was *** 30 goaf areas of Yangla Copper Mine in Yunnan province were selected as the research ***,the rationality of mechanical parameter values in the numerical model was verified using the parameter inversion ***,based on the GoCAD–FLAC^(3D)numerical simulation method,the goaf risk analysis in Yangla Copper Mine was ***,using numerical simulation verification,the goaf filling effect was ***,the prediction results of the IAOA–SVM model were compared with that of other intelligent *** results indicate that the numerical simulation results of the GoCAD–FLAC^(3D)model are consistent with those of IAOA–SVM and the actual results,which further verifies the effectiveness and superiority of the IAOA–SVM prediction ***,an innovative approach for goaf risk prediction is developed.

关键词： Rock mechanics Goaf risk prediction IAOA SVM Numerical simulation

Research progress of heterogeneous structure magnesium alloys:A review

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Journal of Magnesium and Alloys 2024年第6期12卷 2147-2181页

作者： Xiang Chen Junlei Zhang Min Wang Weizhang Wang Di Zhao Haiming Huang Qi Zhao Xiaofei Xu Hongxia Zhang Guangsheng Huang hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration ZoneXiangyang 441000China College of Materials science and Engineering Hubei University of Automotive TechnologyShiyan 442002China College of Materials science and Engineering Kunming University of Science and TechnologyKunming 650093China hubei Key Laboratory of Energy Storage and Power Battery(hubei University of Automotive technology) Shiyan 442002China College of Materials science and Engineering Chongqing UniversityChongqing 400044China School of Mechanical Engineering Suzhou University of Science and TechnologySuzhou 215009China

In recent years,a new class of metallic materials featuring heterogeneous structures has *** materials consist of distinct soft and hard domains with significant differences in mechanical properties,allowing them to maintain high strength while offering superior ***(Mg)alloys,renowned for their low density,high specific strength,exceptional vibration damping,and electromagnetic shielding properties,exhibit tremendous potential as lightweight and functional *** their advantageous properties,high-strength Mg alloys often suffer from limited ***,the emergence of heterogeneous materials provides a fresh perspective for the development of Mg alloys with both high strength and *** article provided a fundamental overview of heterostructured materials and systematically reviewed the recent research progress in the design of Mg alloys with strength-ductility balance based on heterostructure *** review encompassed various aspects,including preparation methods,formation mechanisms of diverse heterostructures,and mechanical properties,both within domestic and international *** this basis,the article discussed the challenges encountered in the design and fabrication of heterostructured Mg alloys,as well as the urgent issues that require attention and resolution in the future.

关键词： Mg alloys Heterogeneous structure Processing techniques Strength and ductility Hetero-deformation induced stress Strain gradient

Structural characterization and prebiotic potential of polysaccharides from Polygonatum sibiricum

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Food science and Human Wellness 2024年第4期13卷 2208-2220页

作者： Zihan Qi Tiexiang Gao Jingjing Li Shuhan Zhou Zhigang Zhang Mingzhu Yin Haiming Hu Hongtao Liu College of Basic Medical sciences Hubei University of Chinese MedicineWuhan 430065China College of Pharmacy Hubei University of Chinese MedicineWuhan 430065China

Polygonatum sibiricum has been widely used due to its excellent biological *** prepared a novel polysaccharide from ***(PSP)in this *** a monosaccharide composition analysis,PSP was mainly composed of fructose and glucose with a molar percentage of 93.81:*** main linkage types were identified asα-D-Glcp-1→and→2-β-D-Fruf-1→.The molecular weight of PSP showed no significant change after simulated salivary and gastrointestinal ***,PSP could be broken down by intestinal *** findings revealed that PSP administration increased the abundance of probiotics such as ***,the results showed that gut microbes could utilize PSP to produce short-chain fatty acids including acetic acid,propionic acid,and butyric ***,the PSP fermentation broth displayed an excellent scavenging effect on free radicals,including 2,2-diphenyl-1-picrylhydrazyl radical,superoxide radical,and hydroxyl *** summary,this study will help to promote the application of PSP as prebiotics in functional food and the medical industry.

关键词： Dietary polysaccharides Prebiotic Gut microbiota Short-chain fatty acids

The short and long-term effect of polystyrene nanoplastics on nitrifying sludge at high nitrite concentrations

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Journal of Environmental sciences 2024年第1期135卷 222-231页

作者： Xiaolong Wang Jialu Huang Zhiqiang Qi Ruiqin Kang Chao Du Da Li School of Chemical and Environmental Engineering Anyang Institute of TechnologyAnyang 455000China Henan Licheng Environmental technology Co. Ltd.Anyang 455000China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

The effect of nanoplastics(NPs)on nitrite oxidation bacteria(NOB)community in treating high-strength wastewater remains unclear,which seriously affects the stability of nitrogen removal *** this study,highly active nitrifying sludge was enriched and exposed to 50nm polystyrene NPs(PS-NPs)for short-term(1,100,500,and 1000 mg/L,1.5 hr)and long-term(1,10,100 mg/L,40 days)at high nitrite *** contrast to previous studies,our results showed that the exposures to PS-NPs had little effect on nitrifying *** long-term exposure,the protein/polysaccharide ratios in extracellular polymeric substances(EPS)were positively correlated with PS-NPs concentrations(0.78–0.99).The produced reactive oxygen species(ROS)were gradually removed,and PS-NPs higher than 10 mg/L caused damage to membrane ***-term exposure for 40 days increased the community diversity and caused significant differences between the control and exposed *** control group were dominated by Nitrobacter and Exiguobacterium,while the exposure group was dominated by Bacillus,Mycobacterium,and Nitrospira.A noticeable shift in the NOB community from Nitrobacter(26.5%to 3.4%)to Nitrospira(1.61%to 14.27%)was observed.A KEGG analysis indicated a decrease in cell growth and death,cell motility and energy *** appeared that NOB could adapt to PS-NPs stress through enhanced secretion and removal of oxidative ***,this study provided new insights into the response mechanism of NOB to PS-NPs exposure.

关键词： Nanoplastics Nitrifying activity Extracellular polymeric substance(EPS) Exposure Community analysis

Optimized the vanadium electrolyte with sulfate-phosphoric mixed acids to enhance the stable operation at high-temperature

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Frontiers of Chemical science and Engineering 2024年第2期18卷 13-26页

作者： Ling Ge Tao Liu Yimin Zhang Hong Liu School of Resource and Environmental Engineering Wuhan University of Science and TechnologyWuhan 430081China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and TechnologyWuhan 430081China hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources Wuhan University of Science and TechnologyWuhan 430081China hubei Provincial Engineering technology Research Center of High Efficient Cleaning Utilization for Shale Vanadium Resource Wuhan University of Science and TechnologyWuhan 430081China School of Resource and Environmental Engineering Wuhan University of TechnologyWuhan 430070China

Herein, the influence of the concentration design and comprehensive performance of the sulfate-phosphoric mixed acid system electrolyte is investigated to realize an electrolyte that maintains high energy density and stable operation at high temperatures. Static stability tests have shown that VOPO4 precipitation occurs only with vanadium(V) electrolyte. The concentration of vanadium ion of 2.0–2.2 mol·L^(–1), phosphoric acid of 0.10–0.15 mol·L^(–1), and sulfuric acid of 2.5–3.0 mol·L^(–1) are suitable for a vanadium redox flow battery in the temperature range from –20 to 50 ℃. The equations for predicting the viscosity and conductivity of electrolytes are obtained by the response surface method. The optimized electrolyte overcomes precipitation generation. It has 2.8 times higher energy density than the non-phosphate electrolyte, and a coulomb efficiency of 94.0% at 50 ℃. The sulfate-phosphoric mixed acid system electrolyte promotes the electrode reaction process, increases the current density, and reduces the resistance. This work systematically optimizes the concentrations of composition of positive and negative vanadium electrolytes with mixed sulfate-phosphoric acid. It provides a basis for the different valence states and comprehensive properties of sulfate-phosphoric mixed acid system vanadium electrolytes under extreme environments, guiding engineering applications.

关键词： all vanadium redox flow battery mixed-acid vanadium electrolyte concentration optimization response surface methodology high-temperature stability

Monascus purpureus M-32 fermented soybean meal improves the growth, immunity parameters, intestinal morphology, disease resistance, intestinal microbiota and metabolome in Pacific white shrimp(Litopenaeus vannamei)

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Animal Nutrition 2024年第2期17卷 283-296页

作者： Pan Wang Shanshan Wang Chuanzhong Zhu Yunzhang Sun Qingpi Yan Ganfeng Yi Fisheries College Jimei University Key Laboratory of Aquatic Functional Feed and Environmental Regulation of Fujian province Fujian DBN Aquatic Sci.&Tech. Co. Ltd. Fantastic Victory(Shenzhen)Technological Innovation Group Co. Ltd.

This study was conducted to evaluate the effects of Monascus purpureus M-32 fermented soybean meal（MFSM） on growth, immunity, intestinal morphology, intestinal microbiota, and intestinal metabolome of Pacific white shrimp（Litopenaeus vannamei）. Four groups of diets were formulated, including control group（30% fish meal and 30% soybean meal [SBM] included in the basal diet） and three experimental groups which MFSM replaced 20%（MFSM20）, 40%（MFSM40）, and 60%（MFSM60） of SBM in control group, respectively. Results showed that the soluble proteins larger than 49 k Da in MFSM were almost completely degraded. Meanwhile, the crude protein, acid-soluble protein, and amino acid in MFSM were increased. The results of shrimp culture experiment showed that the replacement of SBM with MFSM decreased FCR（P < 0.001） and content of malondialdehyde（P = 0.007） in the experimental groups, and increased weight gain rate（P = 0.006）, specific growth rate（P = 0.002）, survival rate（P = 0.005）, intestinal villus height（P < 0.001）, myenteric thickness（P = 0.002）, the activities of superoxide dismutase（P = 0.002）, and lysozyme（P = 0.006） in experimental groups, as well as increased content of calcium(Ca2+) and phosphorus（■） in blood and muscle, and enhanced resistance to Vibrio parahaemolyticus infection. The gut microbiota of MFSM groups was significantly different from that of the control group,and the abundance of Actinobacteria and Verrucomicrobia increased significantly in the MFSM60 group,whereas Proteobacteria and Firmicutes decreased. Compared with the control group, there were significant changes in the levels of several intestinal metabolites in the MFSM60 group, including leukotriene C5, prostaglandin A1, taurochenodeoxycholic acid, carnosine, and itaconic acid. The fermentation of SBM by the strain M. purpureus M-32 has the potential to enhance the nutritional quality of SBM,promote the growth of L. vannamei, boost immune response, improve intestinal morphology and microbiota compos

关键词： Monascus purpureus Fermented soybean meal Litopenaeus vannamei Intestinal microbiota Metabolome