نتایج جستجو برای: nh4cl

تعداد نتایج: 932  

2016
Yong Zhao Wei-Dong Zhang Xin-Qi Liu Peng-Fei Zhang Ya-Nan Hao Lan Li Liang Chen Wei Shen Xiang-Fang Tang Ling-Jiang Min Qing-Shi Meng Shu-Kun Wang Bao Yi Hong-Fu Zhang

A number of emerging studies suggest that air pollutants such as hydrogen sulfide (H2S) and ammonia (NH3) may cause a decline in spermatozoa motility. The impact and underlying mechanisms are currently unknown. Boar spermatozoa (in vitro) and peripubertal male mice (in vivo) were exposed to H2S and/or NH3 to evaluate the impact on spermatozoa motility. Na2S and/or NH4Cl reduced the motility of ...

Journal: :The Journal of experimental biology 1982
J N Cameron G A Kormanik

Acid and base loads infused into the dorsal aorta of the freshwater channel catfish (Ictalurus punctatus Rafinesque) were excreted by both gills and kidneys. The gills excreted 2-3 times as much as the kidneys. After a 2 mmol . kg-1 load of NaHCO3, the gills excreted 50% of the net OH- load in the first 5 h, while the kidneys excreted 18% in the first 6 h. After a 2 mmol . kg-1 load of NH4Cl, t...

Journal: :Brain research 1980
R M Bradley C M Mistretta

To determine whether functional characteristics of the taste system change during development, electrophysiological taste responses were recorded from neurons in the solitary complex (nucleus and tractus solitarius) in the medulla of fetal, newborn and adult sheep. Taste stimuli included NH4Cl, KCl, NaCl, LiCl, citric acid, and HCl, applied to the anterior tongue. Fetal neurons at all ages (84-...

1999
MARC COUGNON PATRICE BOUYER FRÉDÉRIC JAISSER GABRIELLE PLANELLES Patrice Bouyer Frédéric Jaisser Aleksander Edelman

Cougnon, Marc, Patrice Bouyer, Frédéric Jaisser, Aleksander Edelman, and Gabrielle Planelles. Ammonium transport by the colonic H1-K1-ATPase expressed in Xenopus oocytes. Am. J. Physiol. 277 (Cell Physiol. 46): C280–C287, 1999.—Functional expression of the rat colonic H1-K1-ATPase was obtained by coexpressing its catalytic a-subunit and the b1-subunit of the Na1-K1-ATPase in Xenopus laevis oocy...

Journal: :The Biochemical journal 1976
R A Cox P Greenwell

We report the reconstruction, from a core-particle and split-protein fraction, of the larger subribosomal particle of rabbit reticulocytes. The reassembled particle was active in polyphenylalanine synthesis and in the puromycin reaction. The core-particles and split-protein fractions were obtained by treatment of the larger subparticle with salt solutions containing NH4+ and Mg2+ in the molar r...

Journal: :Clinical science and molecular medicine 1978
S G Ball N S Oats M R Lee

1. Plasma and urine free dopamine (3,4-dihydroxyphenethylamine) were measured in six normal male volunteer subjects and the urinary clearance of dopamine was calculated for each subject. 2. The excretion rates for free dopamine in man were greater than could be explained by simple renal clearance. It was concluded that free dopamine must, therefore, be formed in the kidney. 3. Changes in urinar...

Journal: :The Journal of biological chemistry 2016
Mette Assentoft Shreyas Kaptan Hans-Peter Schneider Joachim W Deitmer Bert L de Groot Nanna MacAulay

Ammonia is a biologically potent molecule, and the regulation of ammonia levels in the mammalian body is, therefore, strictly controlled. The molecular paths of ammonia permeation across plasma membranes remain ill-defined, but the structural similarity of water and NH3 has pointed to the aquaporins as putative NH3-permeable pores. Accordingly, a range of aquaporins from mammals, plants, fungi,...

2014
Fei Ren Long Chen Qunyi Tong

Purpose: To investigate the effect of ammonium salts and fermentation pH on the biosynthesis of acarbose by Streptomyces M37. Methods: Different ammonium salts were added to the fermentation broth of Streptomyces M37 to explore their effects on acarbose production. The concentration and addition time of ammonium salts, and the fermentation pH on acarbose biosynthesis were investigated. To study...

Journal: :Cancer research 1986
S Fukushima M A Shibata T Shirai S Tamano N Ito

Since the sodium salt of ascorbic acid (AA) promoted two-stage urinary bladder carcinogenesis in rats, whereas AA itself did not, the roles of the urinary sodium ion concentration and pH on urinary bladder carcinogenesis were investigated. Male F344 rats were given 0.05% N-butyl-N-(4-hydroxybutyl)nitrosamine in their drinking water for 4 weeks and then treated with basal diet containing 5% AA p...

2015
Xing-ren Liu Jian-qiang Ren Sheng-gong Li Qing-wen Zhang Dafeng Hui

Effects of simulated nitrogen (N) deposition on soil net nitrogen mineralization (NNM) were examined in situ during two growing seasons, using the resin-core technique in the semiarid meadow steppe in Inner Mongolia, China. The aim of this study is to clarify the effect of N levels (0, 10, and 20 kg N ha-1yr-1) and forms (NH4+ and NO3-) on soil mineral N and NNM. Our results showed that N level...

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