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Dietary supplementation with succinic acid improves growth performance and flesh quality of adult Nile tilapia (Oreochromis niloticus) fed a high-carbohydrate diet

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ANIMAL NUTRITION 2024年第3期18卷 390-407页

作者： Cao, Manxia Xie, Ningning Zhang, Jianmin jiang, Ming Huang, Feng Dong, Lixue Lu, xing Wen, Hua Tian, Juan Chinese Acad Fishery Sci Key Lab Freshwater Biodivers Conservat Minist Agr Yangtze River Fisheries Res Inst Wuhan 430223 Peoples R China Wuhan Polytech Univ Key Lab Anim Nutr & Feed Sci Hubei Prov Wuhan 430023 Peoples R China

To evaluate the effects of dietary supplementation with succinic acid on growth performance, flesh quality, glucose, and lipid metabolism of Nile tilapia (Oreochromis niloticus) fed a high-carbohydrate diet (HCD), five iso-nitrogenous and iso-lipidic diets were prepared as follows: HCD (control group) consisting of 55% corn starch and HCD supplemented with 0.5%, 1.0%, 2.0%, and 4.0% succinic acid, respectively. Tilapia with an initial body weight of 204.90 +/- 1.23 g randomly assigned to 15 tanks with 3 replicates per group and 10 fish per tank fed for 8 weeks. Increasing dietary succinic acid supplementation resulted in significant second-order polynomial relationship in the weight gain rate (WGR), specific growth rate (SGR), feed conversion ratio (FCR), protein efficiency rate (PER), viscerosomatic index, condition factor, and contents of muscular crude lipid and glycogen (P < 0.05). The hepatosomatic index, mesenteric fat index, liver glycogen content and crude lipid contents of the whole-body and liver demonstrated significantly linear and second-order polynomial relationship (P < 0.05). Quadratic curve model analysis based on WGR, SGR, PER, and FCR demonstrated that optimal supplementation with succinic acid in the HCD of Nile tilapia ranged from 1.83% to 2.43%. Fish fed with 1.0% succinic acid had higher muscular hardness, increased the contents of alkali-soluble hydroxyproline in collagen, docosahexaenoic acid (DHA) and n-3 polyunsaturated fatty acid (n-3PUFA) in muscle, and lower total fatty acid content in muscle (P < 0.05) compared with the control group. Compared to the control group, dietary supplementation with 1.0% succinic acid significantly increased the contents of total bounding amino acid (arginine, histidine, isoleucine, lysine, methionine, alanine, proline), total flavor amino acid (free aspartic acid), the catalase (CAT) activity and total antioxidant capacity, and the mRNA relative expression levels of CAT, superoxide dismutase (SOD), and nucl

关键词： Oreochromis niloticus High-carbohydrate diet Succinic acid Antioxidant capacity Muscular nutritional value Muscle growth SHRIMP LITOPENAEUS-VANNAMEI ANTIOXIDANT CAPACITY BODY-COMPOSITION GENE-EXPRESSION FATTY-ACIDS GLUCOSE-HOMEOSTASIS STARCH LEVELS SEA-BASS METABOLISM MUSCLE

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Stabilizing high-efficiency iridium single atoms via lattice confinement for acidic oxygen evolution

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Nano Research 2024年第4期17卷 2492-2498页

作者： Yibo Wang Jiadong jiang Zhaoping Shi Hongxiang Wu Jiahao Yang Pengbo Wang Shuai Hou Meiling Xiao Junjie Ge Changpeng Liu Wei xing Laboratory of Advanced Power Sources Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026.China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Jilin Province Key Laboratory of Low Carbon Chemical Power Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Physics and Technology for Advanced Batteries Ministry of EducationCollege of PhysicsJilin UniversityChangchun 130012China

Stable and efficient single atom catalysts(SACs)are highly desirable yet challenging in catalyzing acidic oxygen evolution reaction(OER).Herein,we report a novel iridium single atom catalyst structure,with atomic Ir doped in tetragonal PdO matrix(IrSAs-PdO)via a lattice-confined *** optimized IrSAs-PdO-0.10 exhibited remarkable OER activity with an overpotential of 277 mV at 10 mA·cm^(-2) and long-term stability of 1000 h in 0.5 M H_(2)SO_(4).Furthermore,the turnover frequency attains 1.6 s^(-1) at an overpotential of 300 mV with a 24-fold increase in the intrinsic *** high activity originates from isolated iridium sites with low valence states and decreased Ir–O bonding covalency,and the excellent stability is a result of the effective confinement of iridium sites by Ir–O–Pd ***,we demonstrated for the first time that SACs have great potential in realizing ultralow loading of iridium(as low as microgram per square center meter level)in a practical water electrolyzer.

关键词： lattice confinement iridium single atoms ultralow iridium loading acidic oxygen evolution proton exchange membrane water electrolysis

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三维花状MoS2/Fe2O3纳米异质结构的制备及其光催化性质研究

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哈尔滨理工大学学报 2020年第3期25卷 11-17页

作者：姜久兴闫俊杰孙宇王姝哈尔滨理工大学理学院哈尔滨150080

采用两步水热法制备了MoS2/Fe2O3纳米复合材料。对其结构、微观形貌、表面化学成分、光学性能等进行了系统表征,发现当Mo/Fe元素原子比增加到3∶1以上时,SEM观察到MoS2/Fe2O3复合材料的形貌呈现独特的三维纳米花状结构,通过HRTEM可证实... 详细信息

采用两步水热法制备了MoS2/Fe2O3纳米复合材料。对其结构、微观形貌、表面化学成分、光学性能等进行了系统表征,发现当Mo/Fe元素原子比增加到3∶1以上时,SEM观察到MoS2/Fe2O3复合材料的形貌呈现独特的三维纳米花状结构,通过HRTEM可证实异质结构的存在。XRD显示复合材料的物相结构均由六方结构赤铁矿相Fe2O3和辉钼矿相MoS2构成,无任何二次杂质相的存在。PL结果表明异质结构的存在有效加速光生电子空穴对分离,因此在光催化测试中,MoS2/Fe2O3纳米复合材料表现出优异的光催化性能,其中原子数分数3.0%MoS2/Fe2O3的光催化活性最高,20 min降解全部的20 mg/L亚甲基蓝指示剂,其催化活性几乎是单一Fe2O3的10倍。

关键词：三氧化二铁二硫化钼异质结构光催化

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Construction and validation of a pancreatic cancer prognostic model based on genes related to the hypoxic tumor microenvironment

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World Journal of Gastroenterology 2024年第36期30卷 4057-4070页

作者： Fan Yang Na jiang Xiao-Yu Li xing-Si Qi Zi-Bin Tian Ying-Jie Guo Department of Gastroenterology The Affiliated Hospital of Qingdao UniversityQingdao 266000Shandong ProvinceChina

BACKGROUND Pancreatic cancer is one of the most lethal malignancies,characterized by poor prognosis and low survival *** prognostic factors for pancreatic cancer offer inadequate predictive accuracy,often failing to capture the complexity of the *** hypoxic tumor microenvironment has been recognized as a significant factor influencing cancer progression and resistance to *** study aims to develop a prognostic model based on key hypoxia-related molecules to enhance prediction accuracy for patient outcomes and to guide more effective treatment strategies in pancreatic *** To develop and validate a prognostic model for predicting outcomes in patients with pancreatic cancer using key hypoxia-related *** This pancreatic cancer prognostic model was developed based on the expression levels of the hypoxia-associated genes CAPN2,PLAU,and *** results were validated in an independent *** study also examined the correlations between the model risk score and various clinical features,components of the immune microenvironment,chemotherapeutic drug sensitivity,and metabolism-related ***-time quantitative PCR verification was conducted to confirm the differential expression of the target genes in hypoxic and normal pancreatic cancer cell *** The prognostic model demonstrated significant predictive value,with the risk score showing a strong correlation with clinical features:It was significantly associated with tumor grade(G)(bP<0.01),moderately associated with tumor stage(T)(aP<0.05),and significantly correlated with residual tumor(R)status(bP<0.01).There was also a significant negative correlation between the risk score and the half-maximal inhibitory concentration of some chemotherapeutic ***,the risk score was linked to the enrichment of metabolism-related pathways in pancreatic *** The prognostic model based on hypoxia-related genes effectively predicts pancreati

关键词： Pancreatic cancer Hypoxia Prognostic model Immune microenvironment Metabolism pathway

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自蔓延高温合成镍铜锌铁氧体粉体研究

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哈尔滨工业大学学报 2005年第4期37卷 437-439,529页

作者：岳丽华李垚韩杰才赫晓东姜久兴李晓哈尔滨工业大学复合材料研究所黑龙江哈尔滨150001

为了研究低成本大批量生产制备NiCuZn铁氧体的方法,采用自蔓延高温合成(SHS)工艺制备了Ni0.25Cu0.25zn0.5Fe1.96O3.94粉体,将铁氧体粉体分别在800℃、850℃、900℃进行热处理.以XRD、SEM、TG-DSc、振动样品磁强计(VSM)等手段分别对产物... 详细信息

为了研究低成本大批量生产制备NiCuZn铁氧体的方法,采用自蔓延高温合成(SHS)工艺制备了Ni0.25Cu0.25zn0.5Fe1.96O3.94粉体,将铁氧体粉体分别在800℃、850℃、900℃进行热处理.以XRD、SEM、TG-DSc、振动样品磁强计(VSM)等手段分别对产物的物相、微观结构和磁性能进行研究.结果表明,SHS制备的NiCuZn铁氧体粉体经900℃热处理后可以转变成单一的尖晶石相,所得铁氧体粉体结构完整,矫顽力达到最小值,Hc=72.3Oe,同时饱和磁化强度达到最大值,Ms=68.34emu/g.

关键词：自蔓延高温合成铁氧体 NiCuZn

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Inhibiting shuttle effect of lithium polysulfides by double metal selenides for high-performance lithium-sulfur batteries

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Rare Metals 2024年第6期43卷 2546-2559页

作者： Lei Li Xue-Jing Yang Yi-Yang Li Bo Jin Hui Liu Meng-Yang Cui Dong-Bo Guan xing-You Lang Qing jiang Key Laboratory of Automobile Materials Ministry of Educationand College of Materials Science and EngineeringJilin UniversityChangchun 130022China

Lithium-sulfur batteries(LSBs)have attracted the attention of more and more researchers due to the advantages of high energy density,environmental friendliness,and low production ***,the low electronic conductivity of active material and shuttling effect of lithium polysulfides(LiPSs)limit the commercial development of *** solve these problems,we design a core-shell composite with nitrogen-doped carbon(NC)and two types of selenides(FeSe_(2)-NC@ZnSe-NC).The FeSe_(2)-NC@ZnSe-NC has a strong adsorption capacity,and can effectively adsorb *** the same time,it also effectively alleviates the shuttling effect of LiPSs,and improves the utilization of the active substance during the charge/discharge reaction *** mechanism involved in FeSe_(2)-NC@ZnSe-NC is demonstrated by both experiments and density-functional theory(DFT)*** electrochemical test results indicate that LSB with S/FeSe_(2)-NC@ZnSe-NC delivers an initial discharge capacity of 1260 mAh·g^(-1)at *** after 500 cycles at 1C,the capacity decay rate per cycle is 0.031%,and the capacity retention rate is 85%.The FeSe_(2)-NC@ZnSe-NC core-shell structure verifies a rational strategy to construct an electrode material for high-performance LSBs.

关键词： Lithium-sulfur batteries Shuttling effect Metal selenide Nitrogen-doped carbon Lithium polysulfides

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Correlation of gut microorganisms and non-volatile flavor substances provides new insights for breeding Scylla paramamosain

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Journal of Oceanology and Limnology 2024年第4期42卷 1336-1347页

作者： Gao GAO xing LI Kangxiang QIN Yun HU Xiaosong jiang Chenxi CHE Yuntao LI Changkao MU Chunlin WANG Huan WANG School of Marine Science Ningbo UniversityNingbo 315211China Key Laboratory of Applied Marine Biotechnology Ministry of EducationNingbo UniversityNingbo 315211China

The farming of Scylla paramamosain with specific flavors has a higher commercial value,and the flavors are related to the integrated farming environment and non-volatile flavor substances,while the survival environment is one of the important ways to source gut microorganisms in the *** this study,the levels of dominant taxa in the gut flora of *** from Mong Cai,Vietnam(VN),Taishan City,Guangdong Province(TS)of China,and Ninghai County,Ningbo City(NB)Zhejiang Province of China converged with those of *** from Sanmen County,Ningbo City(CK 1,CK 2,and CK 3)at 28 d of *** top 15 genera with the highest abundance of VN,TS,and NB gut flora were the same as CK 1,CK 2,and CK 3,but with different percentages,and gradually converged to CK 1,CK 2,and CK 3,respectively,at 28 d of *** between intestinal flora and non-volatile flavor substances in the hepatopancreas at the percentage level of relative abundance of bacterial genera found that above 28 d of domestication,Muribaculaceae,Psychrilyobacter,Clostridia_vadinBB 60_group,Halarcobacter Carboxylicivirga,Sediminispirochaeta may be the most important genera affecting flavor amino acids of ***,Carboxylicivirga,Halarcobacter,Photobacterium,ZOR 0006,Psychrilyobacter,and Pseudomonas may be the most important genera affecting flavor amino acids of ***,Carboxylicivirga,Halarcobacter,Photobacterium,ZOR 0006,Vibrio,and Sphingomonas may be the most important genera affecting flavor amino acids of *** results show that the intestinal flora structure of crabs from different areas were domesticated in the same area for at least 28 d before they converged to that of the domesticated crab,and the most important genera affecting the flavor amino acids of TS,VN,and NB were also *** results of this study provide a reference and basis for the technique of directional cultivation of the flavor quality of the crab.

关键词： survival environment Scylla paramamosain intestinal flora structure non-volatile flavor substance directional breeding

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The effect of secondary phase on corrosion behaviors of the titanium–zirconium–molybdenum alloy

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Tungsten 2024年第2期6卷 342-354页

作者： Song-Wei Ge Ping Hu Jie Deng Shi-Lei Li Hai-Rui xing Jia-Yu Han xing-jiang Hua Li Wang Jun-Zhou Yang Bo Jin Wen Zhang Kuai-She Wang School of Metallurgy Engineering Xi’an University of Architecture and TechnologyXi’an 710055China National and Local Joint Engineering Research Center for Functional Materials Processing Xi’an University of Architecture and TechnologyXi’an 710055China Western Xinxing Rare and Precious Metals Co. Ltd.Shangluo 726000China Northwest Institute for Non-Ferrous Metal Research Xi’an 710016China

As the range of applications for molybdenum and its alloys has expanded,the corrosive environment for molybdenum alloys has become more *** the past,the content of doping elements has been studied to investigate their infl uence on the corrosion performance of titanium–zirconium–molybdenum(TZM)*** this paper,it is considered that the second phase in the alloy is the main factor aff ecting the corrosion performance of TZM *** comparing the corrosion behavior of molybdenum metal and TZM alloy,the eff ect of the secondary phase on corrosion behaviors of TZM alloy has been *** results show that the second phase reduces the corrosion resistance of the TZM *** potential of the second phase is 73.7 mV higher than that of the Mo matrix,which contributes to the formation of microscopic electric *** the action of microscopic electric couples,pitting corrosion is preferentially formed at the interface between the second phase and the matrix,which accelerates the corrosion of the *** paper provides a theoretical basis for the application of TZM alloys in corrosive environments.

关键词： Secondary phase Electrochemical corrosion Titanium–zirconium–molybdenum(TZM) Galvanic corrosion Corrosion resistance

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Relative position of seeds driven the seedling growth are mediated by root-leaf traits

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JOURNAL OF PLANT ECOLOGY 2024年第2期17卷 24-35页

作者： Zhu, Jing Wang, Xue-Lin Jin, xing jiang, Lan Lin, Hong-Yu Hu, Yang Liu, Jin-Fu He, Zhong-Sheng Fujian Agr & Forestry Univ Coll Forestry Fuzhou 350002 Peoples R China Fujian Agr & Forestry Univ Key Lab Fujian Univ Ecol & Resource Stat Fuzhou 350002 Peoples R China Zhenjiang Nat Resources & Planning Bur Econ & Technol Dev Zone Branch Zhenjiang 212132 Peoples R China

Variations in plant traits are indicative of plant adaptations to forest environments, and studying their relationships with tree growth provides valuable insights into forest regeneration. The spatial arrangement of plant seeds within the forest litter or soil critically influences the variations of root-leaf traits, thereby affecting the adaptive strategies of emerging seedlings. However, our current understanding of the impacts of individual root-leaf traits on seedling growth in different relative position, and whether these traits together affect growth, remains limited. This study focuses on the dominant tree species, Castanopsis kawakamii, within the Sanming C. kawakamii Nature Reserve of China. The present experiment aimed to examine the variations in root-leaf traits of seedling, focus on the relative positions of seeds within different layers: beneath or above the litter layer, or within the bare soil layer (without litter). Our findings provided evidence supporting a coordinated relationship between root and leaf traits, wherein leaf traits varied in conjunction with root traits in the relative positions of seeds. Specifically, we observed that seedlings exhibited higher values for specific leaf area and average root diameter, while displaying lower root tissue density. The mixed model explained 86.1% of the variation in root-leaf traits, surpassing the variation explained by the relative positions. Furthermore, soil nitrogen acted as a mediator, regulating the relationship between seedling growth and root-leaf traits, specifically leaf dry matter content and root tissue density. Therefore, future studies should consider artificially manipulating tree species diversity based on root-leaf traits characteristics to promote forest recovery.

关键词： relative growth rate coordination leaf traits root traits soil nitrogen content seed relative positions FUNCTIONAL TRAITS LIFE-HISTORY DISPERSAL MORTALITY DENSITY LITTER STEM

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Fluorinated [2]rotaxanes as sensitive 19F MRI agents: Threading for higher sensitivity

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Chinese Chemical Letters 2024年第10期35卷 405-408页

作者： Lan Yang Yu Li Mou jiang Rui Zhou Hengjiang Cong Minghui Yang Lei Zhang Shenhui Li Yunhuang Yang Maili Liu Xin Zhou Zhong-xing jiang Shizhen Chen State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in Wuhan Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics School of Pharmaceutical Sciences & College of Chemistry and Molecular Sciences Wuhan University University of Chinese Academy of Sciences Optics Valley Laboratory

As a promising imaging technology, the low sensitivity of fluorine-19 magnetic resonance imaging(19F MRI) severely hinders its biomedical applications. Herein, we have developed an unprecedented rotaxanebased strategy to improve the sensitivity of19F MRI agents. By threading the fluorinated macrocycle into2-blade pinwheel [2]rotaxanes, the19F longitudinal relaxation rate R1was dramatically increased, resulting in a significant19F MRI signal intensity enhancement of up to 79%. Through comparative molecular dynamics studies using a series of solution and solid-state1H/19F nuclear magnetic resonance(1H/19F NMR) and molecular dynamics simulations, it was found that the formation of mechanical bonds dramatically restricts the motion of the wheel fluorines and thus increasing the R1for higher19F MRI *** a novel strategy for improving19F MRI sensitivity, this study has established19F NMR/MRI as a valuable technology for monitoring the molecular dynamics of rotaxanes, which may shed new light on high-performance19F MRI agents and molecular devices.

关键词： 19F MRI Imaging agent Mechanical bond Relaxation rate Rotaxane

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