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The role of temperature as a driver of metabolic flexibility in the Red-billed Leiothrix(Leiothrix lutea)

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Avian Research 2019年第4期10卷 485-496页

作者： Danqi Cui Na Wang jingru Ge Jiaying Xu Weihong Zheng Jinsong Liu School of Life and Environmental Sciences Wenzhou UniversityWenzhou 325035China Zhejiang Provincial Key Lab for Subtropical Water Environment and Marine Biological Resources Protection Wenzhou 325035China

Background:The thermoregulatory ability of animals is strongly influenced by the temperature of their *** to cold requires a range of physiological and morphological *** this study,we tested the hypothesis that a small passerine,the Red-billed Leiothrix(Leiothrix lutea),can maintain homeothermy in cold conditions by adjusting the physiology and biochemistry of its tissue and organs and return to its former physiological and biochemical state when moved to a warm ***:Phenotypic variation in thermogenic activity of the Red-billed Leiothrixs(Leiothrix lutea)was investigated under warm(35℃),normal(25℃)or cold(15℃)ambient temperature *** consumption was measured using an open-circuit respirometry *** state-4 respiration and cytochrome-c oxidase(COX)activity in liver,kidney heart and pectoral muscle were measured with a Clark ***:Birds acclimated to an ambient temperature of 15℃ for 4 weeks significantly increased their basal metabolic rate(BMR)compared to a control group kept at 25℃.Birds acclimated to 35℃ decreased their BMR,gross energy intake(GEI)and digestible energy intake(DEI).Furthermore,birds acclimated to 15℃ increased state-4 respiration in their pectoral muscles and cytochrome-c oxidase(COX)activity in their liver and pectoral muscle,compared to the 25℃ control *** acclimated to 35℃ also displayed lower state-4 respiration and COX activity in the liver,heart and pectoral muscles,compared to those kept at 25℃.There was a positive correlation between BMR and state-4 respiration,and between BMR and COX activity,in all of the above organs except the liver and ***:Our study illustrates that the morphological,physiological,and enzymatic changes are associated with temperature acclimation in the Red-billed Leiothrix,and supports the notion that the primary means by which small birds meet the energetic challenges of cold conditions is through metabolic adj

关键词： Basal metabolic rate Cold acclimation Cytochrome C oxidase Leiothrix lutea State-4 respiration

Dual‑Performance Optimized Silks from Ultra‑Low Dose Polymer Dots Feeding and Its Absorption, Distribution and Excretion in the Silkworms

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Advanced Fiber Materials 2022年第4期4卷 845-858页

作者： jingru Li Yuqiao Li Shuting Lu Juxiang Zhang Chunfu Zhang Liqin Xiong Shanghai Med‑X Engineering Center for Medical Equipment and Technology School of Biomedical EngineeringShanghai Jiao Tong UniversityShanghai 200030People’s Republic of China

Fluorescent polymer dots(Pdots)have the advantages of excellent optical properties,great biocompatibility and high ***,we feed ultra-low doses Pdots to silkworms for the first time and aim to prepare dual-performance modified *** Pdots feeding,the fluorescence signal of cocoons and degummed silks increases significantly,which is more stable and more uniform than that of post-treatment ***,Pdots hinder the conformation transformation of silk fibroin and improve the mechanical property of twisted silk *** highest elongation at break point is 20.75±0.03% and breaking strength is 271.7±3.8 *** excellent fluorescence and mechanical properties,the optimized silks are successfully applied as a scaffold for cell culture and ***,we investigate the metabolism of Pdots in the silkworms for understanding the behaviours of Pdots in the process of silks synthesis and secretion.

关键词： Polymer dots Fluorescence imaging Fluorescent silks Mechanical property Toxicity

Effects of high pressure on the microstructure and hardness of a Cu-Zn alloy

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Rare Metals 2008年第5期27卷 541-544页

作者： ZHAO Juna LIU Lin YANG jingru PENG Guirong LIU Jianhua ZHANG Ruijuna XING Guangzhong State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China Department of Basic Medical Tangshan Vocational Technology College Tangshan 063000 China Department of Information and Electromechanical Engineering Hebei Building Material College of Professional Technology Qinhuangdao 066004 China

The microstructure of a Cu-Zn alloy treated under different high pressures was investigated by means of metallographic, scanning electron microscope （SEM）, energy dispersive spectrometer （EDS）, and X-ray diffraction （XRD）, and the hardness of the Cu-Zn alloy was also measured. The results show that the ct phase with a smaller grain size, different shapes, and random distribution appears in the Cu-Zn alloy during the solid-state phase transformation generation in the temperature range of 25-750℃ and the pressure range of 0-6 GPa. The amount of residual α phase in the microstructure decreases and then increases with increasing pressure. Under a high pressure of 3 GPa, the least volume fraction of residual a phase was obtained, and under a high pressure of 6 GPa, the changes of the microstructure of the Cu-Zn alloy were not obvious. In addition, high pressure can increase the hardness of the Cu-Zn alloy, but it cannot generate any new phase.

关键词： Cu-Zn alloy microstructure hardness high pressure

Thermogenic responses in Eurasian Tree Sparrow(Passer montanus)to seasonal acclimatization and temperature-photoperiod acclimation

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Avian Research 2020年第3期11卷 336-348页

作者： Lin Li jingru Ge Sangyu Zheng Lihong Hong Xini Zhang Ming Li Jinsong Liu College of Life and Environmental Sciences Wenzhou UniversityWenzhou 325035China

Background:Small birds in temperate habitats must either migrate,or adjust aspects of their morphology,physiology and behavior to cope with seasonal change in temperature and *** is,however,difficult to accurately measure how seasonal changes in temperature and photoperiod affect physiological processes such as basal metabolic rate(BMR)and metabolic *** address this problem,we collected data in each month of the year on body mass(Mb)and BMR,and conducted a series of experiments to determine the effect of temperature and photoperiod on Mb,BMR and physiological markers of metabolic activity,in the Eurasian Tree Sparrow(Passer montanus).Methods:In one experiment,we measured monthly change in Mb and BMR in a captive group of birds over a *** another experiment,we examined the effects of acclimating birds to two different temperatures,10 and 30℃,and a long and a short photoperiod(16 h light:8 h dark and 8 h light:16 h dark,respectively)for 4 ***:We found that these treatments induced sparrows to adjust their Mb and metabolic rate *** to 30℃for 4 weeks significantly decreased sparrows’Mb,BMR,and energy intake,including both gross energy intake and digestible energy intake,compared to birds acclimated to 10℃.The dry mass of the liver,kidneys and digestive tract of birds acclimated to 30℃also significantly decreased,although their heart and skeletal muscle mass did not change significantly relative to those acclimated to 10℃.Birds acclimated to 30℃also had lower mitochondrial state-4 respiration(S4R)and cytochrome c oxidase(COX)activity in their liver and skeletal muscle,compared to those acclimated to 10℃.Birds acclimated to the long photoperiod also had lower mitochondrial S4R and COX activity in their liver,compared to those acclimated to the short ***:These results illustrate the changes in morphology,physiology,and enzyme activity induced by seasonal change in temperature and photoperiod in a small

关键词： Acclimation Acclimatization Basal metabolic rate Body mass Eurasian tree sparrow(passer montanus)

Synthesis and Raman Performance Enhancement of Multilayer AuAg Heterostructures with Magnetic Resonance

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Wuhan University Journal of Natural Sciences 2023年第4期28卷 351-358页

作者： HUANG Fan ZHAO Zhirui FENG jingru MA Liang DING Sijing School of Mathematics and Physics China University of Geosciences(Wuhan)Wuhan 430074HubeiChina Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of TechnologyWuhan 430205HubeiChina

Significant amplification of surface enhanced Raman scattering(SERS)signals can be achieved mainly by the electric field enhancement in metal core-shell nanostructures,and the enhanced magnetic field is rarely *** this study,we prepared multi-gap Au/AgAu core-shell hybrid nanostructures by using gold nanocup as the *** overgrowth processes to grow one,two,and three layers of AgAu hybrid nanoshells can produce Au/AgAu^(1),Au/AgAu^(2),and Au/AgAu^(3) *** strong plasmon coupling between the core and shell leads to significant electromagnetic field *** the synergistic effect of electromagnetic plasmon resonance and plasmon coupling,Au/AgAu core-shell hybrid nanostructures exhibit excellent SERS *** also investigate the effect of the interstitial position of the rhodamine B(RhB)molecule on Raman enhancement in Au/AgAu~3 *** study can provide new ideas for the synthesis of multi-gap Raman signal amplifiers based on magnetic plasmon coupling.

关键词： Au/AgAu core-shell hybrid nanostructures magnetic plasmon resonance plasmon coupling surface enhanced Raman scattering(SERS)

The Impact of Supervisory Career Support on Employees’Well-Being:A Dual Path Model of Opportunity and Ability

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International Journal of Mental Health Promotion 2024年第11期26卷 943-955页

作者： Lijun He Weibo Yang Jialing Miao jingru Chen Business School Hohai UniversityNanjing211100China School of Management Wuhan University of TechnologyWuhan430070China Yale Health Mental Health&Counseling Yale UniversityNew HavenCT 06511USA

Background:In the pursuit of fostering employees’well-being,leaders are recognized as playing a vital ***,so far,most of the existing research has focused on leadership behavior and the superficial interaction between leaders and members but has unexpectedly ignored the specific supporting role of supervisors in the career development of employees,that is,supervisory career ***,the internal mechanism of how career support from supervisors is related to and promotes employees’wellbeing is still *** on social cognitive career theory(SCCT),this study aimed to explore whether,how,and when supervisory career support affects employee well-being by introducing the two paths of‘career prospect’and‘career confidence.’Methods:During July 2023,this study employed a cross-sectional *** gathered participants from corporate situated in Southern ***:Results based on a large sample of 14,533 employees showed that supervisory career support was positively related to employees’well-being through the dual path of career prospects(opportunity)and career confidence(ability).Employees high in proactive personality experienced the above positive effects ***:This study provides meaningful implications for managers to implement personalized support strategies to improve employees’well-being.

关键词： Supervisor support employee well-being career prospects career confidence social cognitive career theory

Regulation of signaling pathways in hair follicle stem cells

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Burns & Trauma 2022年第1期10卷 306-324页

作者： Xiaoxiang Wang Yinghui Liu Jia He jingru Wang Xiaodong Chen Ronghua Yang Department of Burn Surgery The First People’s Hospital of FoshanFoshan 528000China Guangdong Medical University Zhanjiang524000China Department of Dermatology Dermatology HospitalSouthern Medical UniversityGuangzhou510091China

Hair follicle stem cells(HFSCs)reside in the bulge region of the outer root sheath of the hair *** are considered slow-cycling cells that are endowed with multilineage differentiation potential and superior proliferative *** normal morphology and periodic growth of HFSCs play a significant role in normal skin functions,wound repair and skin *** HFSCs involved in these pathophysiological processes are regulated by a series of cell signal transduction pathways,such as lymphoid enhancer factor/T-cell factor,Wnt/β-catenin,transforming growth factor-β/bone morphogenetic protein,Notch and *** mechanisms of the interactions among these signaling pathways and their regulatory effects on HFSCs have been previously studied,but many mechanisms are still *** article reviews the regulation of hair follicles,HFSCs and related signaling pathways,with the aims of summarizing previous research results,revealing the regulatory mechanisms of HFSC proliferation and differentiation and providing important references and new ideas for treating clinical diseases.

关键词： Hair follicle stem cells Signaling pathways Proliferation Differentiation Regenerative Repair

Fracture identification of carbonate reservoirs by deep forest model:An example from the D oilfield in Zagros Basin

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Energy Geoscience 2024年第3期5卷 339-350页

作者： Chunqiu Ji Shaoqun Dong Lianbo Zeng Yuanyuan Liu jingru Hao Ziyi Yang National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China College of Science China University of Petroleum(Beijing)Beijing102249China

Identifying fractures along a well trajectory is of immense significance in determining the subsurface fracture network ***,conventional logs exhibit responses in fracture zones,and almost all wells have such ***,detecting fractures through logging responses can be challenging since the log response intensity is weak and *** address this problem,we propose a deep learning model for fracture identification using deep forest,which is based on a cascade structure comprising multi-layer random *** forest can extract complex nonlinear features of fractures in conventional logs through ensemble learning and deep *** proposed approach is tested using a dataset from the Oligocene to Miocene tight carbonate reservoirs in D oilfield,Zagros Basin,Middle East,and eight logs are selected to construct the fracture identification model based on sensitivity analysis of logging curves against *** log package includes the gamma-ray,caliper,density,compensated neutron,acoustic transit time,and shallow,deep,and flushed zone resistivity *** have shown that the deep forest obtains high recall and accuracy(>92%).In a blind well test,results from the deep forest learning model have a good correlation with fracture observation from *** to the random forest method,a widely used ensemble learning method,the proposed deep forest model improves accuracy by approximately 4.6%.

关键词： Fracture identification Conventional log Deep forest Deep learning Tight carbonate reservoir

CEPC positron source design

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Radiation Detection Technology and Methods 2019年第3期3卷 120-126页

作者： Cai Meng Xiaoping Li Guoxi Pei jingru Zhang Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina

Purpose Circular Electron Positron Collider(CEPC)is a 100-km-ring e+e−collider for a Higgs *** injector is composed of a 10-GeV Linac and a 120-GeV *** CEPC Linac is a normal conducting S-band Linac with frequency of 2860 MHz providing electron and positron beams at an energy up to 10 GeV with 100 Hz repetition *** positron source is the most important part of the CEPC Linac,and the bunch charge of positron beam within some cut-off condition should be larger than 3 *** The positron source of CEPC is composed of a target,a flux concentrator,a capture section,a pre-accelerating section and a beam separation *** positron yield and capture efficiency are the design *** on simulation,the design will be presented and discussed in *** The positron yield at the PSPAS exit is larger than 0.55,and the normalized rms emittance is 2370 mm-mrad with a strict cut-off *** detailed simulation results will be *** The design of the positron source including positron production and capture will be presented and can meet the requirements.

关键词： Positron source CEPC Linac AMD Emittance