Results 91 to 100 of about 552 (151)

土壤有机氮解聚作用及其调控进展

Shuitu Baochi Xuebao
目的解析土壤有机氮解聚过程的关键生物地球化学机制及其调控途径，对提升土壤氮素有效性、减少化学氮肥依赖具有重要科学意义。方法系统综述国内外有机氮解聚相关研究进展，明确解聚底物的来源特征与化学组成，总结归纳解聚作用的量化方法，分析解聚过程的主要影响因素及调控途径。结果主要源于微生物的蛋白质类物质（包括蛋白质和多肽）构成土壤中最大的有机氮库，通过氨基酸-15N同位素稀释法测定土壤总蛋白解聚过程中新产生的游离氨基酸通量，可量化土壤有机氮解聚动态。有机氮解聚酶活性及其分泌量是调控解聚过程的关键因素，土壤母质 ...
武艳秋, 葛云晓, 张琪, 胡国庆
doaj  

[Determination of tetracyclines in animal muscle tissues by ultra performance liquid chromatography- tandem mass spectrometry]. [PDF]

Se Pu
Chu K, Li JH, Wang QQ, Li XT, Wu S, Chen C.   +5 more
europepmc   +1 more source

[Risk factors for neonatal asphyxia and establishment of a nomogram model for predicting neonatal asphyxia in Hubei Enshi Tujia and Miao Autonomous Prefecture: a multicenter study]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi, 2023
Jin F, Chen Y, Liu YX, Wu SY, Fang CC, Zhang YF, Zheng L, Zhang LF, Song XD, Xia H, Chen EM, Rao XQ, Chen GQ, Yi Q, Hu Y, Jiang L, Li J, Pang QW, You C, Cheng BX, Tan ZH, Tan YJ, Zhang D, Yu TS, Rao J, Liang YD, Xia SW.   +26 more
europepmc   +1 more source

[Serum levels of polycyclic aromatic hydrocarbons and health risk assessment among children and adolescents]. [PDF]

Se Pu
Wang LP, Deng ZY, Shi SY, Wang HW, Liu K, Li X, Zhang MY, Mei SR.   +7 more
europepmc   +1 more source

[Applications and prospects of biodegradable rare earth magnesium alloys as bone implant materials]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Yue H, Zhu X, Gao Z, Sun Z.
europepmc   +1 more source

典型岩溶县域土壤有机碳的空间分异及主控因素

Shuitu Baochi Xuebao
目的探究岩溶与非岩溶区土壤有机碳(SOC)的空间分异及其主控因素差异。方法以滇东南典型岩溶县域云南省文山市为例，采用网格采样法，调查研究文山市表层(0~20 cm)和深层(0~200 cm)土壤SOC质量分数和空间差异，并运用半变异函数和地理探测器分析外部环境要素对文山市SOC空间分异的影响。结果文山市表层和深层土壤SOC质量分数平均值分别为17.80、5.18 g/kg，总储量为3 770.89×104 t，其中，表层土SOC呈西部高、中北部低的分布格局，深层土SOC呈中西部高、东北部低的分布格局 ...
涂纯, 覃星铭, 李发东, 罗为群
doaj  

[Research progress of molecular imprinting technology in the field of disease diagnosis and therapy]. [PDF]

Se Pu
Zhu R, Cai GP, Zheng HJ, Jia Q.
europepmc   +1 more source

[Expert consensus on the diagnosis, treatment, and prevention of neonatal dengue, chikungunya, and Zika virus infections (2025)]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Perinatal Group, Pediatric Branch of the Chinese Medical Doctor Association; Editorial Board, Chinese Journal of Contemporary Pediatrics.   +2 more
europepmc   +1 more source

[PLCE1 mutation-induced end-stage renal disease presenting with massive proteinuria: a family analysis and literature review]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Abasi R, Zhu ZC, Lin ZL, Zhuang HJ, Jiang XY, Pei YX.   +5 more
europepmc   +1 more source

Spatial Distribution of Calcium and Magnesium in Different Plant Communities in New-born Wetland of Yellow River Estuary

, 2013
以黄河三角洲新生湿地为研究对象,对不同植物群落下湿地土壤Ca、Mg含量的分布特征进行了对比研究。结果表明,不同类型湿地土壤中Ca、Mg含量沿群落演替方向呈波动变化,其水平变异性较大,所有土层均为中等变异(C.V>10%),但Ca的变异性明显大于Mg。Ca的垂直变异性较大,大部分采样点的变异系数在10%以上,属中等变异。影响土壤Ca含量分布的主要因素有成土母质风化迁移以及垂直淋失。比较而言,不同类型湿地土壤中Mg的垂直分布差异不大,其主要受制于湿地土壤水盐条件和成土母质。相关分析表明,土壤中的Ca ...
姜欢欢, 孙万龙, 孙志高, 孙文广, 宋红丽, 牟晓杰, 王玲玲   +6 more
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