surface of mesostructured silica, kit-6, was modified by grafting 3-aminopropyl-triethoxysilane (aptes) to have the positive charge, and thus, to provide sites for the immobilization of h3pw12o40 (pw12).  this modified-nanosized mesoporous silica (pw12-aptes@ kit-6) was characterized by ftir, xrd, bet and tem. the oxidation of sulfides occurs effectively and selectively with h2o2 as the oxidant...

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 calorimetry. the crystal struct...

background: p e r io d ontal d i s e ase i s a c h ro ni c des t ructi v e d i s e a s e w h ich o ccurs in adults, young people, and children .   perio d ontal disease and periodontal pathoge n s ha v e been associ a ted with se v er a l syste m ic dise a ses and more recen t ly, se v e r a l stu d ies have sug g es te d the relat i o n ship bet w een p e rio d ontal d isease and cancer. stu d...

in this scientific research, magnesium oxide (mgo) nanoparticles were synthesized from magnesium nitrate and ammonium solutions via microwave@sol-gel process. the structure and the morphology of the synthesized nanoparticles has been identified and characterized by x-ray diffraction (xrd), n2-bet (brunauer-emmett-tell), scanning electron microscopy (sem) and fourier transform infrared (ftir) te...

the extraction-separation of lanthanum and europium ions with bis(2-ethylhexyl) phosphoric acid (dehpa) in cyclohexane was improved by adding 12-crown-4 (12c4) to the aqueous phase as a masking agent. in the presence of this crown ether the extraction curve of lanthanum ions versus ph shifts to the higher ph region, while the curve is not influenced for the europium ions. consequently the separ...

conclusions considering the strong historical background about the therapeutic potential of the genus hypericum and the considerable cytotoxic and apoptosis induction ability of hypericum scabrum, this species is suggested for future biological studies. results di-chloromethane fraction demonstrated ic50 values of 25.72 μg/ml and 24.73 μg/ml against ht-29 and hepg-2 cell lines, respectively and...

parkinson’s disease (pd) is a rather common movement disorder as a result of the degeneration of dopaminergic neurons within the substantianigra. current treatments for pd afford symptomatic relief with no prevention of disease progression. due to the neuroprotective and anti-apoptotic potential of the isoquinoline alkaloid berberine (bbr), this study was conducted to assess whether bbr pretrea...

tumors of t h e male u ret h ra are r a re, co m prising <1% of urolo g ic malignancies. this is a re po rt of a 44-ye a r-old man pre s ented with a 4 -month history of gross initi a l h e maturia and d y s u ri a . af t e r exami n ing the pa t ien t , we found a firm mass ex t ending 1 c m within the p roxim a l bulb a r uret h ra and a pathologic report of moderately differen t iated sq u a...

background α-adrenergic receptor 2a (adra2a) and angiotensin-converting enzyme (ace) genes have been variably associated with obesity and its related phenotypes in different populations worldwide. objectives this cross-sectional study aims to investigate the association of adrenergic receptor α2a (adra2a) rs553668 and angiotensin-converting enzyme (ace) i/d single nucleotide polymorphisms (snps...

a highly selective, rapid and economical differential pulse polarographic method has been developed for the determination of trace amounts of cadmium and lead present together in various standard alloys and biological samples after adsorption of their 1-(2-pyridylazo)-2-naphthol complexes on microcrystalline naphthalene. cadmium and lead complexes are equantitatively adsorbed on microcrystallin...