نتایج جستجو برای: were 0025 m h2so4
تعداد نتایج: 3824851 فیلتر نتایج به سال:
The behaviour of a system composed of malonic acid (MA), KBrO3, H2SO4, and ferroin was investigated in batch experiments at various concentrations of oxygen above the chemical mixture when changing the concentration of MA. We could observe that at 10% of oxygen or more and for initial concentrations of malonic acid [MA]0 between 0.15 M and 0.6 M the system attains an equilibrium by some of mixe...
Density functional theory has been used to investigate the thermodynamics and activation barriers associated with the direct oxidation of methane to acetic acid catalyzed by Pd2+ cation in concentrated sulfuric acid. Pd2+ cations in such solutions are ligated by two bisulfate anions and by one or two molecules of sulfuric acid. Methane oxidation is initiated by the addition of CH4 across one of...
Synthesis, antibacterial, lipoxygenase and urease inhibitory activities of 2-aminophenol derivatives
In oder to discover potentially active antibacterial compounds, three Schiff bases: 2[(4-methoxybenzylidene)-amino]phenol (5), 2-[(3,4-dimethoxybenzylidene)-amino]phenol (6), 2-[(3,4,5-trimethoxybenzylidene)-amino]phenol (7), were synthesized by the condensation of 2-aminophenol (1) with aldehydes (2-4) in methanol along with H2SO4. The synthesized Schiff bases (5-7) were characterized by H-NMR...
We have studied the structure and formation thermodynamics of dimer clusters containing H2SO4 or HSO − 4 together with ammonia and seven different amines possibly present in the atmosphere, using the high-level ab initio methods RI-MP2 and RI-CC2. As expected from e.g. proton affinity data, the binding of all studied amine-H2SO4 complexes is significantly stronger than that of NH3•H2SO4, while ...
چکیده: بررسی مقایسه ای گونه های مختلف مالاسزیا در پوست و گوش گوساله های نوزاد با مادرانشان با استفاده از روشهای مورفولوژیکی، بیوشیمیایی و فیزیولوژیکی مخمرهای لیپوفیلیک جنس مالاسزیا جزء فلور نرمال جلدی انسان و حیوانات می باشند که تحت شرایطی بیماریزا می شوند. از آنجایی که نه تنها گونه غیر وابسته به چربی بلکه سایر گونه های مالاسزیا از حیوانات مختلف جداسازی می شود لذا بررسی اپیدمیولوژی و انتشار ج...
The forward-walking Green's function Monte Carlo (GFMC) method is used to compute the staggered magnetization m y in the two-dimensional, spin-1=2 Heisenberg Antifer-romagnet on L L square lattices, up to L = 12. Unlike previous GFMC calculations, the method is unbiased and projects out the exact, rotationally invariant groundstate. These calculations provide connrmation of the existence of lon...
We calculate structures and thermochemical parameters for H2SO4•(H2O)n, HSO4 •(H2O)n, H2SO4•NH3•(H2O)m and HSO4 •NH3•(H2O)m clusters (with n = 0 ... 4 and m = 0 ... 1) using the MP2/aug-cc-pV(D + d)Z quantum chemical method, with higher-order corrections computed at the MP2/aug-cc-pV(T + d)Z and MP4/aug-cc-pV(D + d)Z levels. Equilibrium constants for hydrate formation at different temperatures ...
BACKGROUND Lignocellulose is the most abundant biomass on earth. However, biomass recalcitrance has become a major factor affecting biofuel production. Although cellulose crystallinity significantly influences biomass saccharification, little is known about the impact of three major wall polymers on cellulose crystallization. In this study, we selected six typical pairs of Miscanthus samples th...
The inhibition performance of 5-methyl-3-phenylisoxazole-4-carboxylic acid (MPC) alone and in combination with potassium iodide (KI) for low carbon steel 1.0?M HCl H2SO4 solutions is studied...
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