نتایج جستجو برای: nitrate ammonium

تعداد نتایج: 54464  

2015
Lai Peng Yiwen Liu Shu-Hong Gao Xueming Chen Pei Xin Xiaohu Dai Bing-Jie Ni

Nanoscale zero valent iron (NZVI) based microbial denitrification has been demonstrated to be a promising technology for nitrate removal from groundwater. In this work, a mathematical model is developed to evaluate the performance of this new technology and to provide insights into the chemical and microbial interactions in the system in terms of nitrate reduction, ammonium accumulation and hyd...

Journal: :Plant physiology 1986
D G Birch I R Elrifi D H Turpin

The effects of nitrate and ammonium addition on net and gross photosynthesis, CO(2) efflux and the dissolved inorganic carbon compensation point of nitrogen-limited Selenastrum minutum Naeg. Collins (Chlorophyta) were studied. Cultures pulsed with nitrate or ammonium exhibited a marked decrease in both net and gross photosynthetic carbon fixation. During this period of suppression the specific ...

2012
Jin-Mei Chen Hong Zhao

The title compound, C(12)H(18)N(8) (2+)·2NO(3) (-)·2H(2)O, was synthesized unexpectedly from 3-amino-1-methyl-1,4,5,6-tetra-hydro-pyrrolo-[3,4-c]pyrazol-5-ium chloride and cerium(IV) ammonium nitrate. The cation has a crystallographically imposed centre of symmetry. In the crystal, the ions and water mol-ecules are linked via O-H⋯N, N-H⋯O and O-H⋯O hydrogen bonds into a three-dimensional network.

Journal: :Central European Journal of Energetic Materials 2017

Journal: :Revista Virtual de Química 2021

2017
Xinlei Ge Yanan He Yele Sun Jianzhong Xu Junfeng Wang Yafei Shen Mindong Chen

Nitrate is a very important aerosol component, thus elucidation of its characteristics and formation mechanisms is essential and important for effective reduction of aerosol pollution. In this work, highly time-resolved submicron aerosol (PM1) data measured by Aerodyne aerosol mass spectrometers (AMS) in Nanjing, Beijing and Lanzhou during both summer and winter were integrated to investigate t...

2015
F. Fripiat M. Elskens T. W. Trull S. Blain A.-J. Cavagna C. Fernandez D. Fonseca-Batista F. Planchon P. Raimbault A. Roukaerts F. Dehairs

Nitrification, the microbially mediated oxidation of ammonium into nitrate, is generally expected to be low in the Southern Ocean mixed layer. This paradigm assumes that nitrate is mainly provided through vertical mixing and assimilated during the vegetative season, supporting the concept that nitrate uptake is equivalent to the new primary production (i.e., primary production which is potentia...

Journal: :Chemical Bulletin of Kazakh National University 2010

Journal: :Acta Crystallographica Section E Structure Reports Online 2013

Journal: :The Journal of the Society of Chemical Industry, Japan 1959

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