[Determination of glufosinate and its metabolite residues in tea by ultra-high performance liquid chromatography-tandem mass spectrometry coupled with precolumn derivatization]. [PDF]
Se PuBi RF +5 more
europepmc +1 more source
[Progress in preparation of plant biomass-derived biochar and application in pesticide residues field]. [PDF]
Se Pu, 2022 Zhang X, Zhen D, Liu F, Peng Q, Wang Z.
europepmc +1 more source
MIGRATION OF PENTAVALENT ANTIMONY IN TWOTYPES OF SOILS TYPICAL TO SOUTH CHINA
, 2015 通过土柱出流实验研究锑在我国南方的红壤和棕色石灰土中的迁移行为,对实验结束后的土柱进行分级提取,得出土壤中不同形态锑的百分比。为分析氧化还原电位对锑迁移的影响,探讨了不同pH条件下锑在覆铁石英砂中的迁移行为。实验结果表明,锑在棕色石灰土中迁移时穿透曲线的峰值(C/C_0=0.88)比在红壤(C/C_0=0.26)中的高,出流所需时间短;在红壤中迁移时穿透曲线的"拖尾"现象较明显。第二次出流的情况正好相反,锑在红壤中的穿透曲线峰值明显升高C/C_0达到0.58 ...
张华, 周世伟, 徐绍辉, 李璐璐
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RCTUnet: a deep learning model for crop-residue-soil image segmentation and crop residue cover extraction. [PDF]
J Zhejiang Univ Sci BLi T +12 more
europepmc +1 more source
, 2007 以黄土高原南部旱地小麦田和空闲地为研究对象,设置6种处理,研究了耕作措施、肥料条件变化对小麦不同生育期土壤磷酸酶活性和土壤N2O排放通量的影响.结果表明,耕层土壤磷酸酶活性与土壤N2O排放通量呈显著负相关,相关系数为0.4660.在小麦生育期内,N2O排放通量在拔节期最高,苗期和成熟期最低;磷酸酶活性变化与之相反.农田种植小麦和覆膜均增加了土壤磷酸酶活性和N2O的排放.施肥可以提高磷酸酶活性,单施磷肥比同时施用氮 ...
白红英 +3 more
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[Central nervous system infection mimicking neuropsychiatric systemic lupus erythematosus: A case report]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanZhao K, Lu F, Wang Y.
europepmc +1 more source
[<i>Lactobacillus plantarum</i> alleviates lead exposure-induced learning and memory impairment in mice by regulating bile acid metabolism and inhibiting hippocampal NLRP3 expression]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoLi L, Yu W, Tan M, Li Y, Liu A, Meng X.
europepmc +1 more source
田间条件下Pb在土壤-水稻中的迁移特征?/Transfer characteristics of Pb in soil-rice system under field conditions[J]
, 2015 以湘中某工矿区农田为研究对象，野外定点采集红壤和紫色土母质水稻土耕层土壤及其对应样点水稻分蘖期和成熟期样品，分别使用富集系数、迁移系数和累积系数研究了Pb在土壤?水稻系统中的迁移特征．结果表明，成熟期水稻各部位 Pb含量为根＞茎叶＞稻壳＞糙米，其富集系数分别为55．07％、8．13％、2．47％、0?10％；迁移系数分蘖期为0．034％，成熟期0．080％，成熟期高于分蘖期（P＜0．01），成熟期迁移系数紫色土高于红壤（P＜0．01）；糙米累积系数红壤为0．40％，紫色土0．27％，红壤大于紫色土（P ...
HOU Hongbo +15 more
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Diagnosis and treatment for a case of Legionella longbeachae severe pneumonia and literature review. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2021 Feng S, Luo P, Huang S, Ou Z.
europepmc +1 more source
, 2008 本发明公开了一种便携式土壤呼吸测定气室，由底座和测量室组成，底座固定于土壤中，测量室放置在底座上；测量室包括一个中空的壳体，壳体内的顶部中央安装有风扇，壳体内的顶部两侧设有与红外气体分析仪连通的通气嘴，壳体的底部外围有插入底座的环体；底座包括一个圆筒，圆筒的外围设有供测量室插入的水槽，圆筒的底部沿外壁向内径方向制成锥形尖端。本发明的便携式土壤呼吸测定气室，采用底座和测量室分离设置，能够为红外气体分析仪提供分析气体源，从而计算土壤呼吸速率 ...
樊军,齐丽彬
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