Results 81 to 90 of about 55,673 (131)

NO_3~-N leaching and distribution in soil profile in dry highland of Loess Plateau under long-term fertilization

, 2003
在黄土旱塬区 ,长期施肥对土壤剖面NO3- N含量和分布有显著影响 .施用化学氮肥 ,土壤剖面中出现NO3- N的淋溶与深层累积 ,而施用磷肥和有机肥有减弱NO3- N向更深层淋溶的作用 .单施氮肥处理 (N) ,NO3- N的累积峰深度最大 ,为 1 2 0～ 2 0 0cm ;N、P有机肥配施处理 (NPM ) ,NO3- N的累积峰值最高 ,但峰深度降低至 60～ 1 2 0cm ;N、P配施 (NP)累积深度为 80～ 1 4 0cm .不施氮肥 ,分布在土壤剖面中NO3- N含量显著降低 ...
党廷辉, 郭胜利, 郝明德, 樊军
core  

[Simultaneous Analysis of Microcystins, Cylindrospermopsin, Anatoxin, and Nodularin in Lake Water by Liquid Chromatography-Tandem Mass Spectrometry]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Yuan G, Luo Q, Liu G, Qin X, Liu H, Lü Z, Jiang J.   +6 more
europepmc   +1 more source

Nitrogen effect and leaching under nitrogen-application or plastic film mulching planting in wheat cropland of dryland

, 2003
在陕西长武旱塬进行的试验表明,小麦施用氮肥增产显著。在小麦生育前期持续干旱条件下,地膜覆盖并没有使小麦表现出较好的增产效果。施用氮肥或氮肥与有机肥配施都可能引起NO-3向深层淋溶,而且氮肥用量越大,淋溶量及深度愈大;施用有机肥NO-3累积现象减弱。小麦对硝态氮主要吸收深度范围为0～80cm;不同施肥处理对土壤剖面NH+4的影响不大。施用氮肥会明显增加小麦吸氮量,但氮肥利用率随其用量增加而降低。试验条件下,低(施氮量为100kg/hm2)、高(施氮量为150kg/hm2 ...
党廷辉, 郭胜利, 蔡贵信, 郝明德   +3 more
core  

[Determination of perfluorinated compounds， antibiotics and pesticides in drinking water by automated solid phase extraction with ultra-performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Liang J, Feng J, Zeng D, Zhou L, Zhong X, Li Y, Chen D.   +6 more
europepmc   +1 more source

[Simultaneous determination of 38 indazole amides synthetic cannabinoids and 15 metabolites in wastewater by solid phase extraction-liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Yang Z, Jiang LW, Wu YD, Jia R, Lyu JX.
europepmc   +1 more source

草鱼不同类群淋巴细胞的分离及鉴定

, 2001
用白细胞分离介质Histoque 10 77将草鱼外周血液中淋巴细胞分离后 ,依据它们对尼龙毛的粘附特性分为粘附性细胞和非粘附性细胞两个类群。分别检测分离前、后的淋巴细胞的细胞表面超微结构、α 醋酸萘酯酶活性及膜表面球蛋白。结果表明 :表面粗糙细胞、α 醋酸萘酯酶阳性细胞和膜表面球蛋白阳性 (SIg+ )细胞在外周血液总淋巴细胞中的比例分别为 47.8%、15 .2 %和 5 3.8% ,在粘附性淋巴细胞中的比例分别为 82 .3%、0 .1%和 76 .2 ...
罗晓春,李正秋,王金虎,张奇亚
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[Diffuse large B-cell lymphoma with acquired von Willebrand syndrome: a case report and literature review]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Wang FD, Ding BJ, Li MJ, Song XW, Hu JX, Liu L, Zhou H.   +6 more
europepmc   +1 more source

[Design and application of a gas-liquid separator for the removal of carbon dioxide in the eluent of an ion chromatography system]. [PDF]

Se Pu
Peng YH, Tang JW, Li YH, Zhang FF, Yang BC.   +4 more
europepmc   +1 more source

[Aggressive NK-cell leukemia with CD5(+)CD10(-) monoclonal B cell lymphocytosis and hemophagocytic lymphohistiocytosis: a case report and literature review]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Liu M, Liu XJ, Zhou Y, Zhang MN, Hao D, Shi M.   +5 more
europepmc   +1 more source

[Epstein-Barr virus-positive nodal T/NK-cell lymphoma presenting with hemophagocytic lymphohistiocytosis: a case report and literature review]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Qiu JY, Liu YP, Mi HL, Yang YL, Liang F, Fang HZ, Jia XT, Li JY, Miao Y.   +8 more
europepmc   +1 more source