Results 101 to 110 of about 1,040 (165)

[Simultaneous determination of saturated and aromatic hydrocarbons in soil by on-line high performance liquid chromatography-gas chromatography]. [PDF]

Se Pu, 2021
Liu L, Li B, Wu Y.
europepmc   +1 more source

[Determination of polybrominated diphenyl ethers in marine sediments by composite chromatography column purification-gas chromatography-negative chemical ionization-mass spectrometry]. [PDF]

Se Pu, 2023
Dong JY, Song SP, Sun XM, Jin YJ, Hao Q, Zhu J, Li TJ.   +6 more
europepmc   +1 more source

[Matrix solid-phase dispersion extraction of organophosphorus flame retardants in soil based on response surface methodology]. [PDF]

Se Pu
Wang J, Xu S, Sun Y, Lei H, Cheng Y, Wang X, Zhang Z.   +6 more
europepmc   +1 more source

[Determination of three new herbicide residues in soil, sediment and water by liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
He HM, Xu LY, Zhang CP, Fang N, Jiang JH, Wang XY, Yu JZ, Zhao XP.   +7 more
europepmc   +1 more source

Characteristics of spatial variability of total soil nitrogen in the typical subtropical red soil hilly areas

, 2005
在GIS支持下,运用地统计学方法分析了耕层土壤全氮的空间变异特征,并在此基础上利用Kriging插值方法绘制了土壤全氮的空间分布图。结果表明,在步长间隔60m下,土壤全氮具有较强的空间相关性,其相关距离为208m。在NE30°、NE120°两个方向上具有典型的几何异向性结构特点;在NE60°、NE150°两个方向上具有典型的带状异向性结构特点。Kriging插值结果表明,研究区土壤全氮的空间分布表现为条带状和斑块状分布 ...
刘守龙, 吴金水, 宋变兰, 肖和艾, 苏以荣, 路鹏, 黄敏, 黄道友   +7 more
core  

[Determination of 17 bisphenol compounds in human urine by solid supported liquid-liquid extraction-ultra-high performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Jin Y, Zhang LG, Zhou JX, Ma JJ, Yuan LL, Xiao P, Wang GQ.   +6 more
europepmc   +1 more source

[Simultaneous determination of 30 antibiotics in soil by ultra-high performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu, 2021
Hu Y, Zhu Q, Hu L, Liao C.
europepmc   +1 more source

Spatial heterogeneity of soil nutrients and aboveground biomass in abandoned old-fields of Loess Hilly region in Northern Shaanxi,China

, 2008
应用地统计学方法,研究了群落尺度上陕北黄土丘陵区不同演替阶段猪毛蒿、长芒草和达乌里胡枝子3种撂荒群落土壤全氮、全磷和地上生物量的空间异质性。利用基于距离矩阵的M antel偏相关方法分析了群落地上生物量与土壤全氮、全磷在不同尺度上的相互关系,分析了土壤全氮、全磷及群落自身的空间过程对群落地上生物量空间分布的解释程度。结果表明:(1)猪毛蒿、长芒草和达乌里胡枝子3种群落土壤全氮含量空间自相关性较差,而全磷自相关性较好,不同深度的土壤全氮含量其空间异质性大小也有所差别。3种群落0~20 ...
山仑, 张兴昌, 徐学选, 杜峰, 梁宗锁   +4 more
core  

大兴安岭重度火烧迹地不同林龄落叶松人工林土壤团聚体养分特征

Shuitu Baochi Xuebao
[目的] 为探寻大兴安岭重度火烧迹地植被恢复后不同林龄落叶松人工林下土壤团聚体养分含量与分布的变化。[方法] 以大兴安岭1987年发生特大森林火灾形成的重度火烧迹地上分别在1989年、2000年、2010年种植的落叶松人工林(11,21,32年)作为研究对象,通过测定土壤团聚体各粒级有机碳、全氮、全磷、碱解氮、速效磷和速效钾的含量,开展土壤团聚体养分分布特征研究。[结果] (1)在重度火烧迹地上不同林龄的落叶松人工林中,土壤各粒级团聚体有机碳、全氮、全磷、碱解氮和速效钾的含量均随着粒径的减小逐渐上升 ...
韦自强, 郑磊, 贺怀宇, 王振国, 伊怀虎, 任鹏, 辛颖   +6 more
doaj  

[Determination of sixteen antibiotics and four β-agonists in human urine samples using ultra-performance liquid chromatography-tandem mass spectrometry based on high-throughput automatic solid-phase extraction]. [PDF]

Se Pu, 2023
Li ZH, Hu XJ, Lu YF, Xie LN, Zhu Y.
europepmc   +1 more source