Results 121 to 130 of about 1,226 (171)

[Clinical analysis of donor-purified CD34(+) stem cell boost in 11 patients with poor hematopoietic reconstruction after haploid hematopoietic stem cell transplantation for aplastic anemia]. [PDF]

open access: yesZhonghua Xue Ye Xue Za Zhi
He Y   +13 more
europepmc   +1 more source

塔里木沙漠公路防护林土壤酶分布特征及其与有机质的关系

open access: yesShuitu Baochi Xuebao, 2004
对咸水灌溉条件下的塔里木沙漠公路防护林土壤酶活性及其对土壤有机质的影响进行的研究表明:人工绿地建成后,土壤结构和养分状况得到改善,土壤酶活性大幅提高,并且在时间和空间分布上呈现明显的规律性。通径系数分析显示,土壤蛋白酶对土壤有机质直接作用最大,其余依次为中性磷酸酶、脲酶、转化酶、碱性磷酸酶和过氧化氢酶。中性磷酸酶—碱性磷酸酶、碱性磷酸酶—中性磷酸酶、脲酶—中性磷酸酶、蛋白酶—中性磷酸酶之间的间接作用对土壤有机质动态影响较大,其余土壤酶间的作用相对不显著。
doaj  

[Research advance of solid-phase microextraction based on covalent organic framework materials]. [PDF]

open access: yesSe Pu
Cheng YC   +8 more
europepmc   +1 more source

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