共查询到20条相似文献,搜索用时 31 毫秒
1.
Thomas Pohl Julia Walter Stefan Stolpe Joel H Defeu Soufo Peter L Grauman Thorsten Friedrich 《BMC biochemistry》2007,8(1):13
Background
Frataxin is discussed as involved in the biogenesis of iron-sulfur clusters. Recently it was discovered that a frataxin homologue is a structural component of the respiratory NADH:ubiquinone oxidoreductase (complex I) in Thermus thermophilus. It was not clear whether frataxin is in general a component of complex I from bacteria. The Escherichia coli homologue of frataxin is coined CyaY. 相似文献2.
Emanuel Makrlík Petr Toman Petr Vaňura Rajendra Rathore 《Monatshefte für Chemie / Chemical Monthly》2011,286(1):447-451
Abstract
From extraction experiments in the two-phase water/nitrobenzene system and γ-activity measurements, the stability constant of a hexaarylbenzene-based receptor. Tl+ complex species dissolved in nitrobenzene saturated with water was determined. By using the quantum-mechanical density functional level of theory calculations, the most probable structure of this complex was derived. 相似文献3.
Background
Cysteine sulfenic acid (Cys-SOH) plays important roles in the redox regulation of numerous proteins. As a relatively unstable posttranslational protein modification it is difficult to quantify the degree to which any particular protein is modified by Cys-SOH within a complex biological environment. The goal of these studies was to move a step beyond detection and into the relative quantification of Cys-SOH within specific proteins found in a complex biological setting--namely, human plasma. 相似文献4.
Md Alamgir Veronika Erukova Matthew Jessulat Ali Azizi Ashkan Golshani 《BMC chemical biology》2010,10(1):6
Background
Chemical-genetic profiling of inhibitory compounds can lead to identification of their modes of action. These profiles can help elucidate the complex interactions between small bioactive compounds and the cell machinery, and explain putative gene function(s). 相似文献5.
Petr Toman Emanuel Makrlík Petr Vaňura 《Monatshefte für Chemie / Chemical Monthly》2011,286(1):779-782
Abstract
From extraction experiments in the two-phase water/nitrobenzene system and γ-activity measurements, the stability constant of the beauvericin·Na+ complex species dissolved in nitrobenzene saturated with water was determined. By using quantum mechanical density functional level of theory (DFT) calculations, the most probable structure of this complex species was derived. 相似文献6.
A combined extraction and DFT study on the complexation of the silver cation with dibenzo-18-crown-6
Emanuel Makrlík Petr Toman Petr Vaňura 《Monatshefte für Chemie / Chemical Monthly》2011,286(1):137-140
Abstract
Extraction experiments in the two-phase water/nitrobenzene system and γ-activity measurements were used to determine the stability constant of the dibenzo-18-crown-6·Ag+ complex species in nitrobenzene saturated with water. Furthermore, the structure of the resulting complex was derived by means of theoretical calculations at the density functional level. 相似文献7.
Do-Min Lee Gullapalli Kumaraswamy Kee-In Lee 《Monatshefte für Chemie / Chemical Monthly》2009,14(4):73-78
Abstract
Catalytic transfer hydrogenation of α-tosyloxyarylketones mediated by a chiral rhodium complex using an azeotropic mixture of formic acid/triethylamine afforded the corresponding 1-arylethanediol monotosylates in excellent yield with high enantioselectivity. 相似文献8.
Petr Toman Emanuel Makrlík Petr Vaňura Václav Ka?i?ka Rajendra Rathore 《Monatshefte für Chemie / Chemical Monthly》2010,286(1):737-741
Abstract
By means of theoretical calculations at density functional level, the complex structure of a hexaarylbenzene-based receptor with Na+ was derived. In the resulting complex having C 3 symmetry, the sodium cation synergistically interacts with the hydrophilic polar ethereal oxygen fence and with the central hydrophobic benzene bottom of the parent receptor via cation–π interaction. 相似文献9.
Juliana S Luz Celso RR Ramos Márcia CT Santos Patricia P Coltri Fernando L Palhano Debora Foguel Nilson IT Zanchin Carla C Oliveira 《BMC biochemistry》2010,11(1):22
Background
The archaeal exosome is formed by a hexameric RNase PH ring and three RNA binding subunits and has been shown to bind and degrade RNA in vitro. Despite extensive studies on the eukaryotic exosome and on the proteins interacting with this complex, little information is yet available on the identification and function of archaeal exosome regulatory factors. 相似文献10.
Background
Three macromolecular assemblages, the lid complex of the proteasome, the COP9-Signalosome (CSN) and the eIF3 complex, all consist of multiple proteins harboring MPN and PCI domains. Up to now, no specific function for any of these proteins has been defined, nor has the importance of these motifs been elucidated. In particular Rpn11, a lid subunit, serves as the paradigm for MPN-containing proteins as it is highly conserved and important for proteasome function. 相似文献11.
Guy N. L. Jameson 《Monatshefte für Chemie / Chemical Monthly》2011,37(1):325-329
Abstract
A short review of the role of cysteine and iron in the progression of Parkinson’s disease is presented. The complex chemistry of cysteine and iron and its interactions are discussed and put into the context of oxidative stress during neurodegeneration. 相似文献12.
Petr Toman Emanuel Makrlík Petr Vaňura 《Monatshefte für Chemie / Chemical Monthly》2010,287(2):301-304
Abstract
From extraction experiments in the two-phase water/nitrobenzene system and γ-activity measurements, the stability constant of the benzo-18-crown-6–ammonium complex in nitrobenzene saturated with water was determined. Furthermore, the structure of the resulting complex was derived by means of theoretical calculations at the density functional level. 相似文献13.
Emanuel Makrlík Ji?í Dybal Petr Vaňura 《Monatshefte für Chemie / Chemical Monthly》2009,279(2):251-254
Abstract
From extraction experiments in the two-phase water–nitrobenzene system and γ-activity measurements, the stability constant of the valinomycin–lithium complex in nitrobenzene saturated with water was determined. Further, the structure of the resulting complex was indicated by means of the density functional level of theory (DFT) calculations. 相似文献14.
Svetlana Markovi? Zorica D. Petrovi? Vladimir Petrovi? 《Monatshefte für Chemie / Chemical Monthly》2009,16(9):171-175
Abstract
The mechanism of the preactivation process of trans-dichlorobis(diethanolamine-N)palladium(II) complex is investigated using density functional theory. The role of diethanolamine (a solvent for the reaction in the absence of a strong base) and acetonitrile (solvent for the reaction in the presence of a strong base) is analyzed by using a discrete model. The Onsager model is applied to assess the effect of the bulk medium. Both models show that diethanolamine activates the complex and thus is a better suited solvent for the Heck reactions of the investigated complex. 相似文献15.
Emanuel Makrlík Petr Toman Petr Vaňura 《Monatshefte für Chemie / Chemical Monthly》2012,289(3):199-202
Abstract
From extraction experiments in the two-phase water–nitrobenzene system and γ-activity measurements, the stability constant of the beauvericin–Cs+ complex species dissolved in nitrobenzene saturated with water was determined. By using quantum–mechanical density functional level of theory (DFT) calculations, the most probable structure of this complex was derived. 相似文献16.
Vladimir P. Petrovi? Svetlana Markovi? Zorica D. Petrovi? 《Monatshefte für Chemie / Chemical Monthly》2011,17(1):141-144
Abstract
The mechanism of the formation of the active Pd(0) complex from trans-dichlorobis(diethanolamine-N)palladium(II) complex in the presence of strong base was investigated by using density functional theory (M06 method). Our investigation shows that in the basic environment trans-dichlorobis(diethanolamine-N)palladium(II) complex undergoes abstraction of the alcoholic proton, and coordination of alkoxide oxygen to palladium. The intermediate complex, in which hydrogen is coordinated to Pd, undergoes reductive elimination of HCl, yielding the catalytically active low ligated Pd(0) complex. 相似文献17.
Background
A lot of effort has been focused on the integration of nanorods/nanowire as building blocks into three-dimensional (3D) complex superstructures. But, the development of simple and effective methods for creating novel assemblies of self-supported patterns of hierarchical architectures to designed materials using a suitable chemical method is important to technology and remains an attractive, but elusive goal. 相似文献18.
Abstract
The surfactant complex ion cis-[Co(tmd)2(C12H25NH2)2]3+ (tmd = 1,3-propanediamine, C12H25NH2 = dodecylamine) has been synthesized and characterized by elemental analysis and spectral data. In addition we have determined the critical micelle concentration of the surfactant–cobalt(III) complex and studied the kinetics and mechanism of the complex with ferrocyanide anion. The reaction is found to be second order, and the second-order rate constant increases with increasing initial concentration of the surfactant–cobalt(III) complex due to the presence of self-micelles formed by the complex itself. The thermodynamic parameters were determined. The results have been analyzed. 相似文献19.
Emanuel Makrlík Petr Vaňura Jan Budka 《Monatshefte für Chemie / Chemical Monthly》2009,287(1):583-585
Abstract
The stability constant of the dibenzo-18-crown-6·H3O+ cationic complex species dissolved in nitrobenzene saturated with water has been determined from extraction experiments in the two-phase water–nitrobenzene system and from γ-activity measurements. Various structures of protonated dibenzo-18-crown-6 are discussed. 相似文献20.
Robabeh Baharfar Seyed M. Vahdat Fatemeh G. Hakimabadi 《Monatshefte für Chemie / Chemical Monthly》2009,10(1):489-493