Zobrazeno 241 - 250
of 462
pro vyhledávání: '"35"'
Publikováno v:
Journal of the American Chemical Society. 119:9810-9815
It was found that perfluoropolyethers (PFPE) with carboxylic acid end groups, PFPE-COOH, and their sodium salts, PFPE-COONa, afford an anhydrous fluid medium in which the direct pair-wise interaction of these end groups may be examined. An IR study (
Publikováno v:
Journal of the American Chemical Society. 119:10439-10445
Formation of ML+ and ML2+ complexes of coronene was investigated with 25 atomic ions (M+) in the low-pressure gas-phase environment of the Fourier-transform ion cyclotron resonance (FT-ICR) ion trapping mass spectrometer. All of the atomic ions forme
Publikováno v:
Journal of the American Chemical Society. 119:10121-10126
The resting state of nitrogenase shows an S = 3/2 electron paramagnetic resonance (EPR) signal resulting from the FeMo-cofactor (MoFe7S9:homocitrate) of the MoFe protein. When the enzyme undergoes turnover under a CO atmosphere, this signal disappear
Publikováno v:
Journal of the American Chemical Society. 119:8852-8856
Soluble silica reduces aluminum availability and ameliorates toxicity in several biological systems. It has therefore been suggested that these two species strongly interact in solution. However, there is only weak affinity between monomeric silicic
Publikováno v:
Journal of the American Chemical Society. 119:7440-7451
Irradiation of DNA with UV-B light causes the formation of mutagenic DNA lesions such as cis−syn and trans−syn cyclobutane pyrimidine dimers. DNA photolyases are flavin-dependent repair enzymes which directly revert the mutagenic cis−syn pyrimi
Autor:
M. C. Simpson, Mark R. Ondrias, Christopher M. Cheatum, E. S. Peterson, D. D. Eads, J. M. Friedman, Colman Shannon
Publikováno v:
Journal of the American Chemical Society. 119:5110-5117
Transient resonance Raman spectroscopy has been used to probe the vibrational dynamics of the heme active site of deoxyhemoglobin during photoexcitation. Near UV pulses of approximately 35 ps in duration were used to both excite the sample and genera
Autor:
Krisztina Takács-Novák, Peter I. Nagy
Publikováno v:
Journal of the American Chemical Society. 119:4999-5006
The equilibrium ratios for the zwitterionic and neutral forms of the nicotinic and isonicotinic acids (3- and 4-COOH pyridines) have been determined by spectrophotometry in mixtures of water with methanol, tetrahydrofuran and dioxane. The zwitterioni
Autor:
Haoyun An, Becky D. Haly, Richard H. Griffey, Allister S. Fraser, Jacqueline R. Wyatt, Ramesh Bharadwaj, Lendell L. Cummins, P. Dan Cook, Laura Wilson-Lingardo, Lisa M. Risen
Publikováno v:
Journal of the American Chemical Society. 119:3696-3708
Chemical modification of pre-formed asymmetric polyazaphane scaffolds by simultaneous addition of functionality (letters) in solution has been developed for the preparation of tertiary nitrogen-based combinatorial chemistry libraries. This approach h
Autor:
Shuqiang Niu, Michael B. Hall
Publikováno v:
Journal of the American Chemical Society. 119:3077-3086
The migratory insertion reaction of NO into the Co−CH3 σ-bond in the cobalt cyclopentadienyl complex CpCo(NO)(CH3) (2), both with and without the assistance of an incoming ligand (PH3, 1), has been studied using ab initio molecular orbital and den
Publikováno v:
Journal of the American Chemical Society. 119:3853-3860
Recent kinetic measurements of the oxidation of linoleic acid by soybean lipoxygenase show that the thermal rate constants, kH ) 280 ((12) s -1 and kD ) 5.0 ((0.1) s -1 , are weakly temperature dependent within the temperature interval 30-50 °C. The