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Design and Application of Turbine Cascade Partitioned Endwall Profiling

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Journal of Thermal Science 2025年第1期34卷 110-128页

作者： ZENG Fei JIANG Ruiqi xue Xingxu DU wei LUO Lei ZHOU Xun AECC Hunan Aviation Powerplant Research Institute School of Energy Science and Technology Harbin Institute of Technology Science and Technology on Diesel Engine Turbocharging Laboratory China North Engine Research Institute

The influence of partitioned profiling design based on a large-pitch highly loaded cascade is studied by numerical *** partitioned profile is mainly composed of a pressure-side convex structure near the leading edge and a suction-side convex structure at the midstream and downstream sides of the *** influence of the change in the vertex axial position and peak value of the B-line on the secondary flow control is *** this paper,air(ideal gas) is selected as the flow *** average static pressure at the outlet and the average total temperature at the inlet are kept *** γ-θ is used as the turbulence *** results show that the pressure-side convex structure suppresses the spanwise and pitchwise migration of the inlet flow by adjusting the static pressure distribution of the flow field,so the development of the pressure-side leg of the horseshoe vortex is effectively *** suction-side convex structure adjusts the static pressure distribution of the flow field and increases the included angle between the cross-flow and suction surface,so the accumulation of low-momentum fluid,the development of a corner vortex and the flow separation at the trailing edge of the suction-side surface are all suppressed near the endwall-suction ***,the energy loss coefficient of the large-pitch highly loaded cascade is decreased from 0.0564 to 0.0485,representing a 25% reduction in secondary flow losses.

关键词： Vortex flow

Brain region-specific roles of brain-derived neurotrophic factor in social stress-induced depressive-like behavior

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Neural Regeneration Research 2025年第1期20卷 159-173页

作者： Man Han Deyang Zeng wei Tan Xingxing Chen Shuyuan Bai Qiong Wu Yushan Chen zhen wei Yufei Mei Yan Zeng Brain Science and Advanced Technology Institute Wuhan University of Science and TechnologyWuhanHubei ProvinceChina Geriatric Hospital Affiliated to Wuhan University of Science and Technology WuhanHubei ProvinceChina School of Public Health Wuhan University of Science and TechnologyWuhanHubei ProvinceChina

Brain-derived neurotrophic factor is a key factor in stress adaptation and avoidance of a social stress behavioral *** studies have shown that brain-derived neurotrophic factor expression in stressed mice is brain region–specific,particularly involving the corticolimbic system,including the ventral tegmental area,nucleus accumbens,prefrontal cortex,amygdala,and *** how brain-derived neurotrophic factor participates in stress processing in different brain regions will deepen our understanding of social stress *** this review,we discuss the expression and regulation of brain-derived neurotrophic factor in stress-sensitive brain regions closely related to the pathophysiology of *** focused on associated molecular pathways and neural circuits,with special attention to the brain-derived neurotrophic factor–tropomyosin receptor kinase B signaling pathway and the ventral tegmental area–nucleus accumbens dopamine *** determined that stress-induced alterations in brain-derived neurotrophic factor levels are likely related to the nature,severity,and duration of stress,especially in the above-mentioned brain regions of the corticolimbic ***,BDNF might be a biological indicator regulating stress-related processes in various brain regions.

关键词： amygdala chronic mild stress chronic social defeat stress corticolimbic system depression hippocampus medial prefrontal cortex nucleus accumbens social stress models ventral tegmental area

Optimizing electronic structure through point defect engineering for enhanced electrocatalytic energy conversion

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Green Energy & Environment 2025年第1期10卷 109-131页

作者： wei Ma Jiahao Yao Fang Xie Xinqi Wang Hao Wan Xiangjian Shen Lili Zhang Menggai Jiao zhen Zhou Interdisciplinary Research Center for Sustainable Energy Science and Engineering(IRC4SE2) School of Chemical EngineeringZhengzhou UniversityHenan450001China

Point defect engineering endows catalysts with novel physical and chemical properties,elevating their electrocatalytic *** introduction of defects emerges as a promising strategy,effectively modifying the electronic structure of active *** optimization influences the adsorption energy of intermediates,thereby mitigating reaction energy barriers,altering paths,enhancing selectivity,and ultimately improving the catalytic efficiency of *** elucidate the impact of defects on the electrocatalytic process,we comprehensively outline the roles of various point defects,their synthetic methodologies,and characterization ***,we consolidate insights into the relationship between point defects and catalytic activity for hydrogen/oxygen evolution and CO_(2)/O_(2)/N_(2) reduction reactions by integrating mechanisms from diverse *** underscores the pivotal role of point defects in enhancing catalytic *** last,the principal challenges and prospects associated with point defects in current electrocatalysts are proposed,emphasizing their role in advancing the efficiency of electrochemical energy storage and conversion materials.

关键词： Point defect engineering Doping Vacancy Electrocatalysis Electronic structure

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麦斛的组织培养与快速繁殖研究

中医药导报 2005年第8期11卷 57-58页

作者：郑学威浙江省淳安临岐中心医院浙江淳安311000

目的:在麦斛自然繁殖率低下的情况,探讨利用组织培养方法解决繁殖的问题。方法:采用不同部位麦斛外植体进行无菌苗的诱导培养。结果:诱导率表现为茎尖>带腋芽的茎段,而叶片则不能被诱导发芽。茎尖是理想的快速繁殖标准。初代培养过程中,... 详细信息

目的:在麦斛自然繁殖率低下的情况,探讨利用组织培养方法解决繁殖的问题。方法:采用不同部位麦斛外植体进行无菌苗的诱导培养。结果:诱导率表现为茎尖>带腋芽的茎段,而叶片则不能被诱导发芽。茎尖是理想的快速繁殖标准。初代培养过程中,MS+6BA(2mg/L)+NAA(0.2mg/L)为最佳培养基;MS+NAA(0.2mg/L)为理想的继代增殖培养基;1/2MS+IBA(1.0mg/L)+NAA(0.1mg/L)为最佳的生根培养基。结论:组织培养可解决麦斛繁殖。

关键词：麦斛组织培养快速繁殖

生长抑制剂所诱导的乳酸乳球菌MG1363的自溶表型及其生长阶段特异的性质（英文）

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微生物学通报 2017年第6期44卷 1322-1330页

作者：谷小珍薛玮祯汪惠丽徐毅合肥工业大学食品科学与工程学院安徽合肥230000

【目的】自溶是细菌在压力环境下通过自身裂解而获得的一种生理适应现象,研究的目的是全面探讨乳酸菌株在生长抑制剂条件下的自溶表型及机理。【方法】对多种来源的乳酸菌株的自溶能力进行检测,通过在不同生长条件和抑制剂压力条件下乳... 详细信息

【目的】自溶是细菌在压力环境下通过自身裂解而获得的一种生理适应现象,研究的目的是全面探讨乳酸菌株在生长抑制剂条件下的自溶表型及机理。【方法】对多种来源的乳酸菌株的自溶能力进行检测,通过在不同生长条件和抑制剂压力条件下乳酸乳球菌MG1363的生长检测对其自溶表型进行分析。【结果】在葡萄糖严格受限的培养基中,氨苄青霉素的加入能够显著诱导MG1363的自溶,而且该自溶现象只发生在葡萄糖耗尽的时间点,展现出一种狭窄的生长时期依赖的特征。与此同时,因为氨苄青霉素的加入,4种主要的自溶酶的表达都发生了不同程度的显著改变。此外,所有受试的抑制剂都削弱了MG1363在非营养条件下的自溶,表明该菌株可能具有一种涉及细胞壁合成和降解酶的共同调控的模式。【结论】乳酸菌株在不同生长抑制剂条件下的自溶表型存在很大差异,且该自溶体现出营养条件和生长时期严格依赖的特征。

关键词：自溶抗生素生长抑制剂乳酸菌乳酸乳球菌

面向JavaEE Web应用系统的性能诊断策略

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信息与电子工程 2012年第2期10卷 231-236页

作者：薛振伟中国工程物理研究院计算机应用研究所四川绵阳621900

JavaEE Web应用系统的复杂性极容易导致性能问题,其中服务器端是性能问题产生的主要根源。针对服务器环节,基于"由外而内,由表及里,层层深入"的基本原则,提出一种系统化的性能诊断思路和流程,从用户视角、资源视角和组件视角逐层深入,... 详细信息

JavaEE Web应用系统的复杂性极容易导致性能问题,其中服务器端是性能问题产生的主要根源。针对服务器环节,基于"由外而内,由表及里,层层深入"的基本原则,提出一种系统化的性能诊断思路和流程,从用户视角、资源视角和组件视角逐层深入,分别从用户事务、系统资源、Web资源和页面组件4个层次阐述性能诊断的策略,为同类系统的性能诊断工作提供参考。

关键词：性能诊断 Web应用 JavaEE平台

Cobalamin-dependent radical S-adenosyl-L-methionine protein functions with a partner to successively methylate tricyclic indole alkaloid for chuangxinmycin maturation and derivatization

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Science China Chemistry 2025年第1期68卷 308-316页

作者： Sili Wang Jiancheng Huang Yanan Du wei Huang Yufeng xue Xiaokun Xu Guannan Zhong Yuanyuan Shi Bin Hong Xiaoying Bian Wen Liu State Key Laboratory of Chemical Biology Shanghai Institute of Organic Chemistry University of Chinese Academy of SciencesChinese Academy of Sciences State Key Laboratory of Microbial Technology Shandong University National Health Commission (NHC) Key Laboratory of Biotechnology for Microbial Drugs Institute of Medicinal BiotechnologyChinese Academy of Medical Science & Peking Union Medical College

Cobalamin(Cbl)-dependent radical S-adenosyl-L-methionine(SAM) proteins constitute the largest collection of the radical SAM superfamily that has hundreds of thousands of individual members. Many of these proteins are involved in the biosynthesis of pharmaceutically important natural products to catalyze chemically demanding reactions. In the biosynthetic pathway of chuangxinmycin(CXM), a unique indole alkaloid antibiotic with potent anti-infective activity, functionalization of the characteristic thiopyrano[4,3,2-cd]indole scaffold by regio-and stereoselective C3-methylation is believed to rely on a Cbl-dependent radical process, which, however, remained to be reconstituted biochemically. We here report the dissection of this enzymatic process, which requires the incorporation of Cxm8, a Cbl-dependent radical SAM protein, with Cxm9, a DUF5825family protein that shares no homology to any proteins of known functions. Cxm8 and Cxm9 function together by forming an unexpected heterodimeric complex that selectively catalyzes C3-methylation of the tricyclic indole-S-hetero ring system in a successive manner, achieving CXM and a recently identified, C3-dimethylated congener. Detailed biochemical characterization,isotope labeling, structural simulation and bioinformatics analysis rationalized the catalysis of the Cxm8/Cxm9 complex and particularly the necessity of the DUF5825 protein for C3-methylase activity. This is the first example that a Cbl-dependent protein acts with a partner to exhibit radical SAM activity.

关键词： cbl-dependent radical SAM protein biosynthesis chuangxinmycin stereoselective methylation

The interaction between KIF21A and KANK1 regulates dendritic morphology and synapse plasticity in neurons

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Neural Regeneration Research 2025年第1期20卷 209-223页

作者： Shi-Yan Sun Lingyun Nie Jing Zhang xue Fang Hongmei Luo Chuanhai Fu Zhiyi wei Ai-Hui Tang Hefei National Research Center for Physical Sciences at the Microscale CAS Key Laboratory of Brain Function and DiseaseMinistry of Education Key Laboratory for Membrane-less Organelles and Cellular DynamicsDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefeiAnhui ProvinceChina CAS Center for Excellence in Molecular Cell Sciences Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Department of Neurobiology School of Life SciencesSouthern University of Science and TechnologyShenzhenGuangdong ProvinceChina Brain Research Center Southern University of Science and TechnologyShenzhenGuangdong ProvinceChina

Morphological alterations in dendritic spines have been linked to changes in functional communication between neurons that affect learning and ***-4 KIF21A helps organize the microtubule-actin network at the cell cortex by interacting with KANK1;however,whether KIF21A modulates dendritic structure and function in neurons remains *** this study,we found that KIF21A was distributed in a subset of dendritic spines,and that these KIF21A-positive spines were larger and more structurally plastic than KIF21A-negative ***,the interaction between KIF21A and KANK1 was found to be critical for dendritic spine morphogenesis and synaptic *** of either KIF21A or KANK1 inhibited dendritic spine morphogenesis and dendritic branching,and these deficits were fully rescued by coexpressing full-length KIF21A or KANK1,but not by proteins with mutations disrupting direct binding between KIF21A and KANK1 or binding between KANK1 and *** down KIF21A in the hippocampus of rats inhibited the amplitudes of long-term potentiation induced by high-frequency stimulation and negatively impacted the animals’cognitive *** together,our findings demonstrate the function of KIF21A in modulating spine morphology and provide insight into its role in synaptic function.

关键词： actin cytoskeleton dendrite KANK1 KIF21A microtubule spine morphology spine synaptic plasticity talin1

河北省霸州地区不良妊娠史孕妇弓形虫感染状况调查

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中国血吸虫病防治杂志 2017年第1期29卷 113-115页

作者：朱明慧徐丽娟薛振伟河北省廊坊市第四人民医院妇产科廊坊065700

目的调查河北省霸州地区不良妊娠史孕妇弓形虫感染状况及其危险因素。方法选择2012年3月至2015年12月廊坊市第四人民医院妇产科接诊的不良妊娠史孕妇302例为调查对象(实验组),正常对照组为产前检查无异常妊娠史的孕妇197例。采用酶联免... 详细信息

目的调查河北省霸州地区不良妊娠史孕妇弓形虫感染状况及其危险因素。方法选择2012年3月至2015年12月廊坊市第四人民医院妇产科接诊的不良妊娠史孕妇302例为调查对象(实验组),正常对照组为产前检查无异常妊娠史的孕妇197例。采用酶联免疫吸附法检测2组孕妇血清弓形虫IgG(TOX-IgG)和IgM抗体(TOX-IgM)含量。同时,对2组孕妇进行弓形虫感染危险因素问卷调查。收集整理数据并进行统计分析。结果实验组弓形虫抗体总阳性率为28.15%(85/302),对照组总阳性率为9.64%(19/197),差异有统计学意义(χ~2=24.76,P<0.05)。其中实验组TOX-IgM阳性率为6.95%(21/302),TOX-IgG阳性率为18.54%(56/302),TOX-IgM和TOX-IgG同为阳性者占2.65%(8/302),均高于对照组的2.03%(4/197)、7.61%(15/197)和0(0/197)(χ~2值分别为6.07、11.67、3.76、P均<0.05)。调查显示弓形虫感染孕妇中饲养宠物、菜板生熟不分、喜吃火锅或烧烤、吃生肉习惯、经常在外就餐等比例均明显高于未感染弓形虫的孕妇(χ~2值分别为22.57、3.96、5.87、7.40、4.86,P均<0.05),提示上述不良生活或卫生习惯可能是孕妇感染弓形虫的重要危险因素。结论弓形虫感染可导致不良妊娠的发生。避免与宠物密切接触、不吃未煮熟的肉类以及加强个人卫生防护等是避免育龄妇女发生不良妊娠结局的有效途径。

关键词：弓形虫感染不良妊娠危险因素霸州地区河北省