Results 101 to 110 of about 7,283 (156)

Huan bei taipingyang di qu dai zhi bei zhong tan san tan si zhi wu xian dui feng du yu qi hou tiao jian guan xi yan jiu [PDF]

, 2010
Barton, Loukas, Chen, Fahu, Jia, GD, Qiang, MR, Rao, ZG, Zhang, JW, Zhu, ZY   +6 more
core  

河西走廊盐碱地4种典型植被类型土壤理化性质和酶活性特征

Shuitu Baochi Xuebao
目的探究河西走廊荒漠盐碱地4种植被类型土壤理化性质和酶活性变化及其影响因素，为荒漠盐碱地土壤养分循环和调控机制提供理论依据。方法以河西走廊荒漠盐碱地土壤为研究对象，选取黑果枸杞（Lycium ruthenicum Murr.）单一群落（HH）、黑果枸杞和芦苇（Phragmites australis）群落（HL）、黑果枸杞和骆驼刺（Alhagi camelorum Fisch.）群落（HT）、黑果枸杞和柽柳（Tamarix chinensis Lour.）群落（HC）4种典型植被类型 ...
马大卫, 马彦军, 郭咏淳, 曾雨, 马瑞, 祝建刚   +5 more
doaj  

[Clinical and molecular characteristics of neonatal <i>Klebsiella</i><i>pneumoniae</i> sepsis]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Hebei Provincial Neonatal Sepsis Research Collaboration Group.
europepmc   +1 more source

北京山区不同植被恢复类型土壤质量综合评价

Shuitu Baochi Xuebao
[目的] 综合评价北京山区不同植被恢复类型土壤质量,并进一步确定影响土壤质量的关键因素,为该地区植被恢复与重建提供数据支撑。[方法] 以立地条件相近的侧柏纯林、油松纯林、侧柏油松混交林、侧柏针阔混交林、油松针阔混交林、落叶阔叶混交林和无林地(对照)为研究对象,测定14个土壤理化指标作为土壤质量评价的总数据集(TDS),采用主成分分析法(PCA)和Pearson相关性分析建立土壤质量最小数据集(MDS),利用线性(L)和非线性(NL)2种评分方法计算土壤质量指数(SQI)和一般线性模型(GLM ...
李鹏, 齐实, 张林, 胡俊, 唐颖, 逯进生, 王翔宇, 赖金林, 廖瑞恩, 张岱, 张岩   +10 more
doaj  

[Research on tissue regeneration and engineered scaffold materials in prevention and treatment of lymphedema]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yuan S, Deng C.
europepmc   +1 more source

[Accuracy of dynamic navigation-assisted trephine method for bone harvesting]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Liu J, Zhu N, Chang Y, Gao X, Zhang Y.
europepmc   +1 more source

[Advances in oral and craniofacial bone regeneration modulated by stem cells and biomaterials]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Li Z, Lv L, Zhang X, Xia D, Zhang P, Liu Y, Zhou Y.   +6 more
europepmc   +1 more source

[The influence of different collagenases on the analysis of immune cells in salivary glands of mice with chronic graft-versus-host disease]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Hu ZY, Song QX, Yang SJ, Wei J, Zhang X.
europepmc   +1 more source

基于大气CO

Shuitu Baochi Xuebao
[目的] 为了在大气CO2浓度不断升高的背景下准确估算植被净初级生产力(NPP)。在Carnegie-Ames-Stanford Approach (CASA)模型中引入CO2浓度因子,来模拟不同植被类型的最大光能利用率,并在此基础上对改进后模型的NPP估计潜力进行探索。[结果] 2000—2020年,年平均大气CO2浓度在中国陆地范围均表现为显著升高趋势,平均增幅为2.14 μmol/(mol·a);纳入CO2胁迫因子后,植被类型按最大光能利用率从大到小为农田＞常绿阔叶林＞混交林＞针叶林＞灌丛＞湿地 ...
郑泽豪, 张乐涛, 王清源, 魏仪媛, 何梦真, 卫颖颖   +5 more
doaj  

[A clinical study on the centralized occlusal scheme for implant-supported overdentures in edentulous patients]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Diao C, Wang S, Li M, Pan S, Liu Y.
europepmc   +1 more source