نتایج جستجو برای: mn2

تعداد نتایج: 2944  

Journal: :Antimicrobial agents and chemotherapy 1989
F X Erardi M L Failla J O Falkinham

Cadmium accumulation and transport were studied in two strains of Mycobacterium scrofulaceum differing in their susceptibility to Cd2+ toxicity. A 10-fold excess of either Zn2+ or Mn2+ partially antagonized inhibition of growth by Cd2+. 109Cd2+ uptake by both the tolerant and susceptible strains was temperature dependent and inhibited by a 10-fold excess of either Zn2+ or Mn2+. There were no si...

2008

The highest level of laccase activity (391 Ul–1), as well as significant Mn-oxidizing peroxidases production, were found in solid-state culture with grapevine sawdust as the carbon source. After purification of extracellular crude enzyme mixture of Pleurotus pulmonarius, grown in the medium with the best carbon source (grapevine sawdust), three peaks of laccase activity were noted. The results ...

2015
Chuang-Hsin Chiu Tiing-Yee Siow Shao-Ju Weng Yi-Hua Hsu Yuahn-Sieh Huang Kang-Wei Chang Cheng-Yi Cheng Kuo-Hsing Ma Ichio Aoki

3,4-Methylenedioxymethamphetamine (MDMA), also known as "Ecstasy", is a common recreational drug of abuse. Several previous studies have attributed the central serotonergic neurotoxicity of MDMA to distal axotomy, since only fine serotonergic axons ascending from the raphe nucleus are lost without apparent damage to their cell bodies. However, this axotomy has never been visualized directly in ...

Journal: :Journal of magnetic resonance 2010
Sushil K Misra Stefan Diehl Dmitry Tipikin Jack H Freed

A liquid-helium temperature study of Fe2+ and Mn2+ ions has been carried out on a single crystal of Fe2+-doped ZnSiF(6).6H2O at 5-35K at 170, 222.4 and 333.2G Hz. The spectra are found to be an overlap of two magnetically inequivalent Fe2+ ions, as well as that of an Mn2+ ion. From the simulation of the EPR line positions for the Fe2+ (d6, S=2) ion the spin-Hamiltonian parameters were estimated...

Journal: :Molecules 2013
Peng Liang Wen-Xiu Xia Wei-Man Tian Xian-Hong Yin

Two novel binuclear Mn(II) metal-organic coordination complexes [Mn2(TBZ)2(CDC)(C2O4)]n (1), {[Mn2(TBZ)2(BDC)(0.5)(BTC)(H2O)2]·ET}n (2), (where TBZ = thiabendazole, H2CDC = trans-1,4-cyclohexanedicarboxylic acid, H2C2O4 = oxalic acid, H3BTC = 1,3,5-benzenetricarboxylic acid, ET = ethanol, H2BDC = 1,4-benzenedicarboxylate) have been hydrothermally synthesized and characterized by elemental analy...

2002
K. A. J. R.

The enzymic incorporation of choline-l,2-'C from CDP-choline-1 ,V4C into phosphatidylcholine by spinach leaf preparations was characterized. The enzyme catalyzing the incorporation, choline phosphotransferase, had a pH optimum of about 8.0 and required either Mn2+ or Mg2+ as cofactor. The saturation concentration of Mn2+ was 0.3 mM and that for Mg2+ was 13 mM. The nT, for CDP-choline was 10 p ~...

Journal: :Small 2023

Aqueous Zinc Batteries In article number 2301770, Yueliang Gu, Xiaochuan Ren, Daming Zhu, Jianxin Zou, and co-workers elucidate the reaction mechanism of Mn2+ electrolyte additives in aqueous zinc batteries (ZIBs) via operando synchrotron X-ray diffraction, ex situ absorption spectroscopy electrochemical analyses. A reversible Mn2+/MnO2 deposition/dissolution occurred at cathode, which change e...

Journal: :Nucleic acids research 1992
J Caldentey L Blanco H Savilahti D H Bamford M Salas

Bacteriophage PRD1 replicates its DNA by means of a protein-primed replication mechanism. Compared to Mg2+, the use of Mn2+ as the metal activator of the phage DNA polymerase results in a great stimulation of the initiation reaction. The molecular basis of the observed stimulatory effect is an increase in the velocity of the reaction. The phage DNA polymerase is also able to catalyze the format...

2011
N. Emery E. J. Wildman J. M. S. Skakle A. C. Mclaughlin R. I. Smith A. N. Fitch

A variable temperature neutron and synchrotron diffraction study has been performed on the giant magnetoresistant oxypnictides LMnAsO (L=La, Nd). The low-temperature magnetic structures have been studied, and results show a spin reorientation of the Mn2+ spins below TN (Nd) for NdMnAsO. The Mn2+ spins rotate from alignment along c to alignment into the basal plane, and the Mn2+ and Nd3+ moments...

Journal: :Advances in prostaglandin and thromboxane research 1979
A Raz A Erman

The divalent cations Ca2+, Mg2+, Co2+, Mn2+, Sr2+, and Ba2+ were compared for their stimulatory or inhibitory effect on PG formation in rabbit kidney medulla slices. Calcium, manganese, and strontium ions stimulated PG generation up to 3- to 5-fold in a time- and dose-dependent manner (Ca2+ greater than Mn2+ approximately Sr2+) while the magnesium and cobalt ions were without significant effect...

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