Results 121 to 130 of about 27,586 (214)

长期围栏封育对天山中部草地土壤有机碳及微生物量碳的影响[J]

open access: yes, 2012
以天山中部中科院巴音布鲁克草原生态观测站三种类型草地长期(26 a)围栏封育样地为研究对象,通过野外调查取样结合室内分析的方法,研究了长期(26 a)围栏封育对草地土壤有机碳和微生物量碳含量的影响,结果表明:(1)围栏外(自然放牧条件下),表层的土壤有机碳含量为高寒草甸(165.29 g·kg-1)>高寒草甸草原(98.73 g·kg-1)>高寒草原(83.54 g·kg-1),微生物量碳含量依次为高寒草甸草原(181.70 mg·kg-1)>高寒草甸(146.37 mg·kg-1)>高寒草原(43 ...
苏建红   +7 more
core  

[A case of neonatal fatty acid oxidation disorder]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi
Deng LL   +4 more
europepmc   +1 more source

一种碳化硅气凝胶的制备方法

open access: yes, 2016
本发明涉及一种碳化硅气凝胶的制备方法,包括如下步骤:将聚碳硅烷和乙烯基化合物溶解于有机溶剂中,在70℃~90℃,karstedt催化剂催化反应4~8h,得到聚碳硅烷凝胶;乙烯基化合物含有二个或二个以上乙烯基;将聚碳硅烷凝胶经干燥后得到聚碳硅烷气凝胶;将聚碳硅烷气凝胶经过热处理得到碳化硅-碳复合气凝胶;将碳化硅-碳复合气凝胶在有氧条件下500℃~700℃煅烧1~5h,得到碳化硅气凝胶。该制备方法的原料来源简便、制备方法简单,而且避免使用有毒的氢氟酸作为SiO2去除剂;并且制备过程中聚碳硅烷气凝胶中不含氧 ...
裴学良   +5 more
core  

合成气制液体燃料联产高碳伯醇工艺

open access: yes, 2011
合成气制液体燃料联产高碳伯醇工艺待填
丁云杰
core  

[Chinese guidelines for the clinical application of antibacterial drugs for febrile neutropenia (2026)]. [PDF]

open access: yesZhonghua Xue Ye Xue Za Zhi
Chinese Society of Hematology   +3 more
europepmc   +1 more source

[Comparison of setup errors between two immobilization methods in prostate cancer radiotherapy based on cone-beam computed tomography]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Liu J   +7 more
europepmc   +1 more source

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