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The partitioning patterns of nutrients between pods and seeds of Zanthoxylum fruits impacted by environmental factors

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Acta Geochimica 2018年第5期37卷 676-683页

作者： hechun Piao Siliang Li Zhifeng yan State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Institute of Surface-Earth System Science Tianjin University

The nutritive quality in plant organs is related to the different partitioning patterns of nutrient resources among the organs under various environmental *** study examined the relationship between the nutritive quality of pods and seeds in Zanthoxylum and environmental factors, such as temperature and preciptation by using numerous samples collected from Southwest China to the East China of Shandong peninsula. The increasing accumulations of N, P and C in seeds implied that the nutritive quality in seeds was higher at the regions with relative higher mean annual temperature(MAT) and mean annual precipitation(MAP), while that in pods was on the contrary. By contrast, pod nutritive content was relatively high, but seed nutritive content was relatively low at the regions with relative high MAT and MAP. In addition, C:N ratio in pods was significantly and negatively correlated with MAT and MAP, while that in seed was significantly and positively correlated with MAT and MAP. The partitioning patterns of N-compounds between pods and seeds reflected different nitrogen translocations in the plant organs under various climate condition. The N:P ratios were negatively correlated with MAP, implying a higher proportional allocation of P to seeds than that of N in the areas with a relative high MAP. Therefore, the strategies to assess pod nutritional quality should be taken into accountfor nutritive translocation under various environmental conditions.

关键词： Partitioning pattern Nutritional quality C:Nratio Zanthoxylum fruits Mean annual temperature Mean annual precipitation

Placenta-derived mesenchymal stem cells attenuate secondary brain injury after controlled cortical impact in rats by inhibiting matrix metalloproteinases

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BIOCELL 2024年第1期48卷 149-162页

作者： PING yanG YUANXIANG LAN ZHONG ZENG yan WANG hechun XIA Department of Neurosurgery School of Clinical MedicineNingxia Medical UniversityYinchuanChina Key Laboratory of Ningxia Stem Cell and Regenerative Medicine General Hospital of Ningxia Medical UniversityYinchuanChina Department of Neurosurgery Xi’an International Medical Center HospitalXi’anChina

Background:As a form of biological therapy,placenta-derived mesenchymal stem cells(PDMSCs)exhibit considerable promise in addressing the complex pathological processes of traumaticbrain injury(TBI)due to their multi-target and multi-pathway mode of ***&Methods:This study investigates the protective mechanisms and benefits of PDMSCs in mitigating the effects of controlled cortical impact(CCI)in rats and glutamate-induced oxidative stress injury in HT22 cells in *** primary objective is to provide evidence supporting the clinical application of ***:In the in vivo arm of our investigation,we observed a swift elevation of matrix metalloproteinase-9(MMP-9)in the proximal cortex of injured brain tissues after ***,distinguished by their heightened expression of metalloproteinase tissue inhibitors-1 and-2(TIMP-1 and TIMP-2):were intravenously administered via the caudal *** intervention yielded significant reductions in the permeability of the blood-brain barrier(BBB):the extent of brain edema,the levels of inflammatory cytokines IL-1βand TNF-αin damaged brain tissue,and the activation status of microglia in CCI-afflicted *** the realm of in vitro experiments,PDMSC-conditioned media demonstrated substantial reductions in mortality rates and cleaved caspase-3 levels in glutamate-induced HT22 cells compared with conventional ***,this advantage was negated upon the introduction of neutralizing antibodies targeting TIMP-1 and ***:Collectively,our findings underscore the potential of PDMSCs in alleviating oxidative stress injury and secondary brain injury in the pathological process of TBI.

关键词： Traumatic brain injury Mesenchymal stem cells Oxidative stress Matrix metalloproteinases

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含分布式电源的主动配电网重构策略研究

电力系统保护与控制 2020年第15期48卷 102-107页

作者：潘本仁王和春张妍桂小智万勇国网江西省电力有限公司电力科学研究院江西南昌330096 国网江西省电力有限公司检修分公司江西南昌330029

针对分布式电源在配电网中不断增加及其波动性和间歇性对电网稳定和安全产生的影响,提出了一种含有分布式的主动配电网重构策略。以最小网损作为目标函数,将改进的教与学优化算法应用于主动配电网供电路径的快速优化中。通过算例对含分... 详细信息

针对分布式电源在配电网中不断增加及其波动性和间歇性对电网稳定和安全产生的影响,提出了一种含有分布式的主动配电网重构策略。以最小网损作为目标函数,将改进的教与学优化算法应用于主动配电网供电路径的快速优化中。通过算例对含分布式电源的主动配电网进行分析,以验证改进算法在配电网重构中的优越性。结果表明,该方法收敛速度快、寻优时间短、运行稳定。所做研究工作为我国配电网中接入分布式电源的优化方法提供了参考和借鉴。

关键词：分布式电源网损最小主动配电网重构策略

Integrative analyses identify osteopontin,LAMB3 and ITGB1 as critical pro-metastatic genes for lung cancer

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Integrative analyses identify osteopontin,LAMB3 and ITGB1 as...

第十届中国实验动物科学年会

作者： Xiaomin Wang Jing Li Mingxia yan Lei Liu Deshui Jia Qin Geng hechun Lin Xianghuo He Jinjun Li Ming Yao State Key Laboratory of Oncogenes and Related Genes Shanghai Cancer InstituteRenji HospitalShanghai Jiao Tong University School of Medicine

Objective To explore the key regulatory genes associated with lung cancer in order to reduce its occurrence and progress through silencing these key ***:In order to explore the key regulatory genes involved in lung adenocarcinoma,we performed the combination of gene array and bioinformatics analysis to compare genes transcription profiles in 3 monoclonal cell strains with high,medium or low metastatic abilities,which are separated from SPC-A-lsci and SPC-A-1 cell lines by limiting dilution monoclone assay,we then analyzed those genes’ biological activities by knockdown their expression in SPC-A-lsci cells using siRNA and lenti-virus shRNA vector respectively,and then measured those cells’ abilities of invasion and migration in vitro,and inducing occurrence and metastasis of lung adenocarcinoma in vivo. Results:3 monoclonal cell strains characterized with high,medium or low metastatic abilities are successfully *** array and bioinformatics analysis implied osteopontin,LAMB3,and INTB1 are key genes involved in lung adenocarcinoma. Knockdown of these genes decrease the ability of migration and invasion in vitro,and suppresses murine lung adenocarcinoma growth and metastasis in ***:We confirmed that osteopontin,LAMB3,INTB1 play important roles in regulating occurrence and metastasis of lung adenocarcinoma,which provide important clues to understand the molecular mechanism of metastasis and contribute to the therapeutical treatment of lung cancer.

关键词： Lung cancer Metastasis Osteopontin LAMB3 ITGB1

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海外工程桩基施工质量控制实践

铁道建筑 2010年第11期50卷 93-97页

作者：马建忠洪岩温和春中铁十二局集团有限公司山西临汾041000 武汉铁研工程检测有限公司武汉430071

在工程建设中建立并完善基桩桩身完整性试验、数据分析与判定、修复与加固等方面的程序与技术方案,为阿尔及利亚东西高速公路项目建设发挥了积极作用,也为国内桩基工程质量控制提供经验借鉴。

关键词：基桩声波透射法阻抗试验完整性缺陷修复与加固

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20世纪50年代献方运动的特征与影响

中华医史杂志 2024年第4期54卷 254-256,F0003页

作者：尹鹤錞朱彦付璐秦培洁北京中医药大学岐黄学院北京100105 中国中医科学院中医药信息研究所北京100700 中国中医科学院中国医史文献研究所北京100700

1954—1959年间,在国家号召下,全国各地进行了单方、秘方、验方捐献活动。调研献方运动中出版书籍、地方志及相关研究等资料可知,献方运动在新中国成立初期缺医少药、地区性流行疾病及传染病高发的背景下展开,由四川省、安徽省、福建省... 详细信息

1954—1959年间,在国家号召下,全国各地进行了单方、秘方、验方捐献活动。调研献方运动中出版书籍、地方志及相关研究等资料可知,献方运动在新中国成立初期缺医少药、地区性流行疾病及传染病高发的背景下展开,由四川省、安徽省、福建省率先进行,在1959年经由卫生部通知及号召扩展至全国。从献方运动中出版书籍资料可得,从1955年起,献方运动出版的书籍数量呈上升趋势,出版书籍广泛分布于全国27个省级行政区,且从省到乡镇皆有分布。献方运动主要由当地政府组织,并由各级卫生医疗行政机构开展,对于地区性流行疾病研究与治疗及中医药发展产生深远影响。

关键词：献方运动验方中医当代史

清末川边改土归流前期西藏东部盐井社会状况及周边环境考察

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西藏研究 2016年第5期 17-24页

作者：李何春广西师范学院法学院广西南宁530001

清末,英国势力入侵西藏,川边不保将危及中原,于是清廷积极推动川边的改土归流。盐井改土归流是赵尔丰推进川边改土归流的重要一步,目前学界虽认识到盐井改土归流的重要性,但是对盐井改土归流前期的社会状况,如英国入侵盐井西部的察隅等... 详细信息

清末,英国势力入侵西藏,川边不保将危及中原,于是清廷积极推动川边的改土归流。盐井改土归流是赵尔丰推进川边改土归流的重要一步,目前学界虽认识到盐井改土归流的重要性,但是对盐井改土归流前期的社会状况,如英国入侵盐井西部的察隅等地和盐井周边藏、纳西、独龙、怒、傈僳等民族关系综合考察的论述较少。显然,盐井改土归流是整个川边改土归流的基础,利于推动藏东盐业改革,特别是有效打通了清廷和西藏东部察隅等地的联系,有效遏制了英属印度进一步北犯,维护了国家统一,维护了边疆稳定,增进了该地区民族的国家认同。

关键词：盐井社会状况边疆稳定民族关系

农业供给侧结构性改革背景下黑龙江垦区农民增收问题研究

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黑龙江八一农垦大学学报 2018年第1期30卷 96-99,105页

作者：孙妍侯贺春黑龙江八一农垦大学会计学院大庆163319 黑龙江省繁荣种畜场畜牧科

随着经济的发展、居民生活水平的提高,农业矛盾已由总量不足向结构性矛盾转变,农民增收不能单纯的从提高产量入手,更应该结合居民需求,提高农业供给的质量。因此,在当前农业供给侧结构性改革的背景下,从农业结构、生产成本、信息化建设... 详细信息

随着经济的发展、居民生活水平的提高,农业矛盾已由总量不足向结构性矛盾转变,农民增收不能单纯的从提高产量入手,更应该结合居民需求,提高农业供给的质量。因此,在当前农业供给侧结构性改革的背景下,从农业结构、生产成本、信息化建设、专业技术人才、科技支撑等方面来分析黑龙江垦区农民增收所面临的问题,进而提出促进垦区农民增收的路径。

关键词：黑龙江垦区农业供给侧结构性改革农民增收

深冷挤出切削制备超细晶7075铝合金的组织、性能及时效行为研究

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材料导报 2023年第22期37卷 186-191页

作者：殷晓龙王志林王婉于贺春王汉斌闫文杰中原工学院机电学院郑州450007

传统的大变形工艺制备超细晶材料时不可避免地会产生大量的热,削弱材料的力学性能。深冷挤出切削(CT-EM)作为一种新型的超细晶材料制备工艺,可消除切削热,抑制动态回复,达到提升材料强度与可加工性的目的。本工作以7075铝合金为研究对象... 详细信息

传统的大变形工艺制备超细晶材料时不可避免地会产生大量的热,削弱材料的力学性能。深冷挤出切削(CT-EM)作为一种新型的超细晶材料制备工艺,可消除切削热,抑制动态回复,达到提升材料强度与可加工性的目的。本工作以7075铝合金为研究对象,对比分析了常温挤出切削(RT-EM)与CT-EM超细晶切屑的微观组织、物相演变、力学性能以及时效行为。结果表明:切屑的晶粒尺寸被极大程度地细化,CT-EM切屑的平均晶粒尺寸更小,位错密度更大,硬度和强度更高。经时效处理后,切屑组织内出现了大量弥散析出相,RT-EM与CT-EM切屑的屈服强度分别进一步提升至455 MPa和507 MPa,细晶强化、位错强化及析出相强化共同发挥作用;深冷处理可增强组织内二次相的析出动力,CT-EM切屑更快地达到峰值硬度,且其延伸率有小幅提升,拉伸断口内出现更多的韧窝。

关键词：深冷挤出切削 7075铝合金超细晶力学性能时效处理

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