نتایج جستجو برای: complex structure
تعداد نتایج: 2210131 فیلتر نتایج به سال:
vinblastine is an important anticancer agent known to diminish microtubule assembly. ab initio calculations are applied to examine the structural properties and different energies of vinblastine-tubulin complex in different dielectric constants and temperatures. the aims of this work are discovery the best optimized structure and thermodynamic properties of vinblastine-tubulin complex and compa...
in the present study, we investigated the effect of a new anticancer pd(ii) complex, 1,10-phenanthroline-n-butyl dithiocarbamato pd(ii) nitrate, on the heme releasing from human hemoglobin (hb) as well as alterations in the structure and function of hb using different spectroscopic methods of uv-vis, fluorescence and circular dichroism (cd)at two temperatures of 25 and 37 °c. fluorescence data ...
determination of uranium in natural water and complex solutions using ion exchange chromatography: a combined procedure using ion exchange chromatography and uv-vis spectrophotometry techniques has been developed to measure uranum in natural water and complex solutions. after conditicing , one hundred milli liters of sample solutions have been passed through an ion exchange column,pachked with ...
The copper(II) complex [Cu(pic)2]·2H2O was synthesized with 2-picolinic acid (Hpic) and copper acetate as reactants by room temperature solid-solid reaction. The composition and structure of the complex was characterized by elemental analyses, single crystal X-ray diffraction, X-ray powder diffraction, FT-IR spectroscopy and thermogravimetry-differential scanning calor...
Photosynthesis is a process under which, the radiative energy is converted into the chemical one. Compared to the man-made devices, the photosynthesis apparatus is much more efficient. This high efficiency comes from its elaborate structure, very fast transition rates and a complex electron and proton transfer chain among the subunits of the apparatus. Its main subunits (Photosystem I (PSI), bf...
The internal structure of DNA-CTAB and DNA-DDAB is investigated by a Small Angel X- ray Scattering(SAXS) instrument. Hexagonal packing of DNA was observed for DNA complex with CTAB, and for DDABcomplex is observed lamellar structure. Variations in the internal spacing and degree of long-range ordering aredependent on both surfactant type and concentrations of added salt. When we increased the a...
Mixed-ligand Cu(II) complex was prepared by reaction of salicylaldehyde S-benzylisothiosemicarbazone hydrogenchloride ligand (H2L), Cu(ACo)2.H2O and 1,10-phenanthroline with general formulas [Cu(Phen)2Cl].H2L,Cl,H2O. Its structure was fully characterized by elemental analysis and IR method and single crystal diffraction was also used to better understanding of the molecular structure of the Cu(...
A new complex of cadmium was synthesized by the reaction of cadmium nitrate, potm;sium dichromate, and ethylenediamine. Its crystal structure was dete rmined by X-ray diffractomctry. It is Crystalli:tt.:d in a monoclinic system, with P21 /n(1 4) poinl group and 4 molecules of the complex in the unit ceiL The cryst,d parameters arc: a = 7.4615(7)A. h= 7.1480(2)A. c= 14.~4B5( 10)A /3= 92.(...
In this paper the effect of imbalances between the two branches in LINC transmitters has been analyzed. Then these imbalances have been compensated in the proposed structure adaptively. Conjugate gradient algorithm has been used in the proposed structure to find optimum gain value of each branch for calibrating imbalances. These complex values changes automatically in a way to minimize ph...
abstract: the present thesis includes ; one preface and 11speeches , that each speech considered in different researches . the prefact part , studied grammer back ground , the first speech considered a brief description about grammatical credits . the second speech considered the different typs of sentences , from structure and meaning points of view . the third speech considered the verb es...
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