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Spatio-temporal variations of vegetation carbon use efficiency and potential driving meteorological factors in the Yangtze River Basin

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Journal of Mountain Science 2020年第8期17卷 1959-1973页

作者： YE Xu-chun LIU Fu-hong zhang zeng-xin XU Chong-yu LIU Jia Chongqing Key Laboratory of Karst Environment&School of Geographical Sciences of Southwest University Chongqing 400715China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210098China Department of Geosciences University of Oslo N-0316Norway State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin Institute of Water Resources and Hydropower ResearchBeijing 100038China

Understanding of the vegetation dynamics is essential for addressing the potential threats of terrestrial *** recent years,the vegetation coverage of the Yangtze River Basin(YRB)has increased significantly,yet the spatio-temporal variations and potential driving meteorological factors of carbon use efficiency(CUE)under the context of global warming are still not *** this study,MODIS-based public-domain data during 2000–2015 was used to analyze these aspects in the YRB,a large river basin with powerful ecological functions in ***-temporal variations of CUE in different sub-basins and land cover types were investigated and the correlations with potential driving meteorological factors were *** revealed that CUE in the YRB had strong spatiotemporal variability and varied remarkably in different land cover *** the whole YRB,the average CUE of vegetated land was 0.519,while the long-term change trend of CUE was *** the rising altitude,CUE generally showed an increasing trend until the altitude of 3900 m and then followed by a decreasing *** of grasslands was generally higher than that of croplands,and then forest *** inter-annual variation of CUE in the YRB is likely to be driven by precipitation as a strong positive partial correlation between the inter-annual variability of CUE and precipitation was observed in most of sub-basins and land cover types in the *** influence of temperature and relative humidity is also outstanding in certain regions and land cover *** findings are useful from the view point of carbon cycle and reasonable land cover management under the context of global warming.

关键词： Carbon use efficiency Climate variability MODIS Altitude Land cover type Precipitation

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The effect of selected alloying element additions on properties of Mg-based alloy as bioimplants： A literature review

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Frontiers of Materials Science 2013年第3期7卷 227-236页

作者： Li-Nan zhang zeng-Tao HOU xin YE Zhao-Bin XU Xue-Ling BAI Peng SHANG Center for Translational Medicine Research and Development Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China

This review investigates the current application limitations of Mg and Mg alloys. The key issues hindering the application of biodegradable Mg alloys as implants are their fast degradation rate and biological consideration. We have discussed the effect of some selected alloying element additions on the properties of the Mg-based alloy, especially the nutrient elements in human （Zn, Mn, Ca, St）. Different grain sizes, phase constituents and distributions consequently influence the mechanical properties of the Mg alloys. Solution strengthening and precipitation strengthening are enhanced by the addition of alloying elements, generally improving the mechanical properties. Besides, the hot working process can also improve the mechanical properties. Combination of different processing steps is suggested to be adopted in the fabrication of Mg-based alloys. Corrosion properties of these *** alloys have been measured in vitro and in vivo. The degradation mechanism is also discussed in terms of corrosion types, rates, by- products and response of the surrounding tissues. Moreover, the clinical response and requirements of degradable implants are presented, especially for the nutrient elements （Ca, Mn, Zn, Sr）. This review provides information related to different Mg alloying elements and presents the promising candidates for an ideal implant.

关键词： magnesium alloy alloying element corrosion biodegradation

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Influencing factors of early post-traumatic stress disorder in young and middle-aged individuals with open globe injuries in west China:a cross-sectional study

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International Journal of Ophthalmology(English edition) 2025年第1期18卷 146-153页

作者： Yi-Man Li xin zhang Ji-Hong zeng Hong-Mei Luo Department of Ophthalmology West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina

AIM:To evaluate the prevalence of early post-traumatic stress disorder(PTSD)among young and middle-aged patients who have suffered open globe injuries,and to identify the psychosocial factors influencing PTSD in these ***:A total of 280 patients who underwent ocular trauma surgery between January 2023 and January 2024 were selected through convenience *** were collected using a custom-designed demographic questionnaire,the Connor-Davidson Resilience Scale(CDRISC),the Cognitive Emotion Regulation Questionnaire(C-ERRI),and the PTSD Checklist-Civilian Version(PCL-C).Univariate analysis and stepwise multiple linear regression analysis were performed to determine the factors affecting PTSD in these ***:The average PTSD score for the patients was 33.22±*** scores for individual PTSD dimensions,ranked from highest to lowest,were recurrent traumatic experiences,heightened arousal,avoidance reactions,and social *** PTSD symptoms were observed in 85 patients(30.36%).Univariate analysis indicated that gender,postoperative vision,marital status,psychological resilience,and rumination were significant factors affecting PTSD symptoms(χ^(2)/t=6.53,17.88,8.83,2.17,and 14.1,respectively;all P<0.05).Pearson correlation analysis showed a positive correlation between rumination and PTSD symptoms(r=0.73,P<0.01)and a negative correlation between psychological resilience and PTSD symptoms(r=-0.14,P<0.05).Stepwise multiple linear regression analysis identified postoperative vision(notably eye removal),rumination levels,and psychological resilience(optimism)as major factors influencing PTSD in these patients(R^(2)=0.57,P<0.001).CONCLUSION:Young and middle-aged patients with open globe injuries have a high incidence of *** risk factors for early PTSD include primary enucleation,high levels of rumination,and low psychological resilience(optimism).Conversely,patients with good postoperative vision recovery,low rumination l

关键词： young and middle-aged open globe injuries post-traumatic stress disorder rumination psychological resilience

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Glucocorticoid receptor signaling in the brain and its involvement in cognitive function

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Neural Regeneration Research 2025年第9期20卷 2520-2537页

作者： Chonglin Su Taiqi Huang Meiyu zhang Yanyu zhang Yan zeng xingxing Chen Brain Science and Advanced Technology Institute Hubei Province Key Laboratory of Occupational Hazard Identification and ControlSchool of MedicineWuhan University of Science and TechnologyWuhanHubei ProvinceChina

The hypothalamic-pituitary-adrenal axis regulates the secretion of glucoco rticoids in response to environmental *** the brain,a nuclear receptor transcription fa ctor,the glucocorticoid recepto r,is an important component of the hypothalamicpituitary-a d renal axis's negative feedback loop and plays a key role in regulating cognitive equilibrium and *** glucoco rticoid receptor influences cognitive processes,including glutamate neurotransmission,calcium signaling,and the activation of brain-derived neurotrophic factor-mediated pathways,through a combination of genomic and non-genomic *** interactions within the central nervous system can alter the expression and activity of the glucocorticoid receptor,there by affecting the hypothalamic-pituitary-a d renal axis and stress-related cognitive *** appropriate level of glucocorticoid receptor expression can improve cognitive function,while excessive glucocorticoid receptors or long-term exposure to glucoco rticoids may lead to cognitive *** with cognitive impairment-associated diseases,such as Alzheimer's disease,aging,depression,Parkinson's disease,Huntington's disease,stroke,and addiction,often present with dysregulation of the hypothalamic-pituitary-adrenal axis and glucocorticoid receptor *** review provides a comprehensive overview of the functions of the glucoco rticoid receptor in the hypothalamic-pituitary-a d renal axis and cognitive *** emphasizes that appropriate glucocorticoid receptor signaling fa cilitates learning and memory,while its dysregulation can lead to cognitive *** provides clues about how glucocorticoid receptor signaling can be targeted to ove rcome cognitive disability-related disorders.

关键词： brain-derived neurotrophic factor calcium signaling glucocorticoid receptor glucocorticoid glutamate transmission hypothalamic-pituitary-adrenal axis long-term potentiation neurocognitive disorders neuroplasticity stress

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丙酸对多花黑麦草青贮发酵动态变化的影响

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草业学报 2009年第2期18卷 102-107页

作者：张增欣邵涛南京农业大学动物科技学院江苏南京210095

在实验室条件下制备多花黑麦草青贮饲料,评定不同浓度丙酸(0,0.20%,0.25%,0.30%)对其青贮发酵动态变化的影响。结果表明,添加丙酸对多花黑麦草青贮过程中VFAs含量无明显的影响,增加了发酵后期乳酸及WSC的含量及乳酸/乙酸值,在发酵初期... 详细信息

在实验室条件下制备多花黑麦草青贮饲料,评定不同浓度丙酸(0,0.20%,0.25%,0.30%)对其青贮发酵动态变化的影响。结果表明,添加丙酸对多花黑麦草青贮过程中VFAs含量无明显的影响,增加了发酵后期乳酸及WSC的含量及乳酸/乙酸值,在发酵初期降低了乳酸的含量和青贮初期pH值;降低AN/TN值、乙酸含量及生成速度;丙酸在整个发酵过程中呈现很高的趋势。综合考虑,0.25%添加水平,多花黑麦草青贮发酵品质最好。

关键词：多花黑麦草丙酸发酵品质

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Effects of mode of reproduction on genetic polymorphism and divergence in wild yams(Dioscoreaceae:Dioscorea)

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Plant Diversity 2025年第1期47卷 136-147页

作者： xin Wang Qing-Hong Feng Zhi-Hua zeng Zhi-Qiang zhang Jie Cai Gao Chen De-Zhu Li Hong Wang Wei Zhou Germplasm Bank of Wild Species&Yunnan Key Laboratory of Crop Wild Relatives Omics Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China University of Chinese Academy of Sciences Beijing 100049China Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology Institute of BiodiversitySchool of Ecology and Environmental ScienceYunnan UniversityKunmingYunnan 650504China Research Institute of Tropical Forestry Yunnan Academy of Forestry and GrasslandXishuangbannaYunnan 666102China CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China Key Laboratory of Phytochemistry and Natural Medicines Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China Lijiang Forest Biodiversity National Observation and Research Station Kunming Institute of BotanyChinese Academy of SciencesLijiangYunnan 674100China

Evolutionary transitions from sexual to asexual reproduction should have significant influences on genetic divergence and polymorphism at the genome *** lineages with diverse reproductive systems provide opportunities to investigate this question using comparative approaches and studies of molecular *** investigated evidence for differences among the transcriptomes of 19 Dioscorea species(wild yams)with diverse reproductive *** included sexual species,those that propagate primarily by bulbils,and those with mixed sexual and asexual reproductive *** examined how transitions between these reproductive systems affected between-species divergence and within-species *** asexual species exhibited a reduced efficacy of natural selection and accumulation of deleterious mutations for both divergence and *** contrast,species with mixed reproductive strategies involving both seed and clonal reproduction showed no evidence of an increased fixation of harmful mutations at the divergence level,while an accumulation of genetic load present in polymorphism was *** study indicates that the genetic consequences of evolutionary transitions from sexual to predominantly clonal reproduction is likely to depend on both the duration and extent of asexuality occurring in populations.

关键词： Asexual Deleterious mutations Dioscorea Molecular evolution Selection

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Tribo-piezoelectric hybrid nanogenerator based on temporary solution template process

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Science China(Technological Sciences) 2025年第2期68卷 97-105页

作者： Jinxian zhang Peng PAN Zhengchun YANG Jie HE Peifeng zeng College of Integrated Circuit Science and Engineering Tianjin University of TechnologyTianjin 300382China

In this study,a friction piezoelectric hybrid nanogenerator(HNG)with a sponge-like structure was developed.A novel temporary solution template process was proposed to create smaller,uniformly distributed pores within the sponge structure,allowing for the complete volatilization of the porous agent without causing structural *** output voltage of the porous HNG structure was nearly twice that of its solid structure,demonstrating superior electrical output performance.A peak-to-peak open circuit voltage of 168 V,a short circuit current density of 36.41μA cm^(-2),and a maximum power density of 32 W m^(-2) were obtained at a load resistance of 200 MΩ by periodically compressing an HNG with a dimension of 0.8 cm×0.8 *** generated electricity was sufficient to directly illuminate 180 tandem white LEDs and power small electronic *** addition,this study shows that the HNG could detect electrical signals from different parts of the human body during movement,suggesting significant potential for applications in energy harvesting and motion sensing.

关键词： PDMS hybrid nanogenerator triboelectric piezoelectric flexible composites

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山梨酸对多花黑麦草青贮发酵品质的影响

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草业科学 2009年第3期26卷 64-67页

作者：张增欣邵涛南京农业大学动物科技学院江苏南京210095

研究添加不同比例山梨酸(0、0.05%、0.10%、0.15%、0.20%)对多花黑麦草Lolium multiflorum发酵品质及可溶性碳水化合物含量的影响,确定适宜的山梨酸添加比例。结果表明,青贮30 d后,添加山梨酸组可显著降低pH值、氨态氮/总氮值及酪酸含量... 详细信息

研究添加不同比例山梨酸(0、0.05%、0.10%、0.15%、0.20%)对多花黑麦草Lolium multiflorum发酵品质及可溶性碳水化合物含量的影响,确定适宜的山梨酸添加比例。结果表明,青贮30 d后,添加山梨酸组可显著降低pH值、氨态氮/总氮值及酪酸含量(P0.05)。综合考虑,添加0.1%水平的山梨酸,多花黑麦草发酵品质最好。

关键词：多花黑麦草山梨酸发酵品质水溶性碳水化合物

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山梨酸对多花黑麦草青贮发酵品质变化的影响(简报)

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草地学报 2009年第3期17卷 398-401页

作者：张增欣邵涛南京农业大学动物科技学院江苏南京210095

新鲜青贮原料在青贮容器中压实密封后,由好氧性微生物作用,使乳酸发酵时期发酵底物水溶性碳水化合物(WSC)不足,无法产生足够乳酸,pH值降到4.2以下,引起丁酸发酵[1,2].因此,早期发酵是青贮成功的关键.

关键词：多花黑麦草山梨酸发酵品质

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长江三角洲极端降水趋势及未来情景预估

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南京林业大学学报（自然科学版） 2008年第3期32卷 5-8页

作者：张增信栾以玲姜彤张强曾燕南京林业大学江苏省林业生态工程重点实验室江苏南京210037 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室江苏南京210008 中国科学院研究生院北京100039 中国气象局气候研究开放实验室北京100081 江苏省气象局气象科技开发应用中心江苏南京210008

观测资料显示,1951—2000年长江三角洲年降水和极端降水年际差异较大,但没有呈现显著线性变化趋势。利用ECHAM5/MPI-OM模式与实测降水数据比较发现,该模型能较好的模拟年降水和极端降水变化。2001—2050年,IPCC 3种不同CO2排放情景下,... 详细信息

观测资料显示,1951—2000年长江三角洲年降水和极端降水年际差异较大,但没有呈现显著线性变化趋势。利用ECHAM5/MPI-OM模式与实测降水数据比较发现,该模型能较好的模拟年降水和极端降水变化。2001—2050年,IPCC 3种不同CO2排放情景下,年降水与极端降水变化并不一致,年降水都出现明显的下降趋势,但极端降水却增加显著,尤其中等排放情景下,2020s年代年降水量锐减,但极端降水迅速增加,说明未来长江三角洲洪涝和干旱发生的几率更高,极端气候造成的危害将更严重。

关键词：长江三角洲极端降水气候模型

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