[Research progress in the application of molecular imprinting technology in catalysis]. [PDF]
Se PuYe WM +5 more
europepmc +1 more source
[Simultaneous determination of three components of sodium nitrophenolate in foodstuffs of animal origin by high performance liquid chromatography-tandem mass spectrometry using atmospheric pressure chemical ionization]. [PDF]
Se Pu, 2022 Zou Y, Shao L, Lan C, Chen S.
europepmc +1 more source
Optimum fertilization for high-sugar and low-nitrate pumpkin production in the Loess Plateau
, 2008 采用N、P、K3因素最优设计,在陕北黄土高原进行了南瓜氮、磷、钾用量及其肥效反应模式田间试验,研究不同施肥量对南瓜硝态氮、可溶性糖两项营养品质的影响,旨在探讨南瓜品质高糖低硝酸盐的N、P、K肥效反应模式,提出优化的施肥方案。结果表明,N肥单因素对南瓜硝态氮和可溶性糖含量影响最大,K肥单因素对南瓜硝态氮和可溶性糖含量影响不显著,N与P交互作用对南瓜高糖低硝酸盐影响显著,K肥施用量一定时,氮肥与磷肥的施用量不易过大。根据南瓜N、P、K肥效反应模式,筛选出南瓜品质硝态氮含量在200mg·kg ...
高静 +5 more
core
[<i>Poria cocos</i> polysaccharide alleviates cyclophosphamide-induced intestinal barrier dysfunction and inflammation in mice by modulating gut flora]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoZhang Y +10 more
europepmc +1 more source
, 2014 The+objective+of+this+study+was+to+investigate+the+effect+of+elevated+carbon+dioxide+concentration+and+different+nitrogen+fertilizer+treatments+on+the+activities+of+nitrate+reductase+in+seedlings+of+Cinnamomum+camphora.+Seedlings+grown+in+semi+open-top ...
林君如, 許博行
core
[Rapid determination of 15 N-nitrosamines in air-dried yak meat using one-step QuEChERS-gas chromatography-triple quadrupole mass spectrometry]. [PDF]
Se PuXia H +8 more
europepmc +1 more source
, 2015 苯胺类化合物(ANs)作为一类重要的有机合成中间体，在精细化工领域占有非常重要的地位。苯胺类化合物主要是由相应的硝基苯类化合物(NBs)还原制得，其中液相催化加氢还原法因其环境友好而成为合成苯胺类化合物的主要方法。金属催化剂是影响液相催化加氢效率的关键因素，其中Raney Ni催化剂，因其价格较贵金属催化剂便宜，而更适合实际工业化生产。但是Raney Ni的催化活性有待进一步提高，而且硝基苯类化合物加氢过程中中间产物的积累影响加氢反应的进程，有待改善。 针对以上问题，本文选用Raney Ni为催化剂 ...
刘霞
core
[Effect of intestinal nitrate on growth of Klebsiella pneumoniae and its regulatory mechanism]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoXie J, Ma R, Li M, Li B, Xiong L.
europepmc +1 more source
Gongye shui chuli通过提高进水氨氮使稳定运行的短程硝化系统受到抑制，然后向反应器中投加硼来促进短程硝化效能的恢复。通过氮转化能力、氨氧化菌活性、胞外聚合物（EPS）中蛋白质（PN）和多糖（PS）含量、污泥形态和颗粒污泥的粒径分布来对短程硝化系统的变化进行表征。结果表明，稳定运行的短程硝化系统在短时间内受到800 mg/L氨氮冲击后短程硝化效能下降，污泥稳定性减弱，且在氨氮重新恢复到200 mg/L后短期内其效能仍无法恢复；与抑制期相比，投加硼后系统在恢复期的氨氮去除率从50%上升到95%，亚硝酸盐积累率从50%上升到85%
赵莹莹, 陈涛, 沈耀良, 刘文如
doaj
[Determination of 12 prohibited veterinary drug residues in pig urine by ultra high performance liquid chromatography-tandem mass spectrometry]. [PDF]
Se PuWan JC +7 more
europepmc +1 more source