background: today, issues such as water shortage, difficulties and costs related to supplying safe water, and anomalous concentrations of heavy metals in groundwater and surface water resources, doubled the necessity of access to technical methods on removing these pollutants from water resources. methods: in this lab study, cationic resin purolite s-930 (with co-polymer styrene di-vinyl benzen...

in this paper, grafting of acrylic acid monomer on gum tragacanth was performed. variable of experiment included concentration of initiators and monomer, time, and temperature. grafting efficiency was measured in the term of percentage of grafting (%g) and percentage of grafting efficiency (%e). effectiveness of grafted gum in ferrous ion removal at different condition was assessed. according t...

Single crys ta l semiconductors (n-Si, p-Si , n -GaAs , p -GaAs , n -GaP, n-In.P, and n -CdS) were coated wi th n t y p e TiO~ by a chemical vapor deposi t ion technique, and the e lec t ron and hole t r ans fe r proper t ies across the he te ro junct ion so produced were invest igated. The qua l i ty of the deposi ted TiO~ film depended upon severa l factors inc luding t empe ra tu r e and sub...

in this study, the ion association phenomenon in the saturated solution of kcl in the mixed solvent(methanol+water) was studied. the solubility of this compound in the mixed solvent (methanol+water by value percent of methanol = 60%), and in the presence of various molarities of nano3 wasdetermined by the solvent evaporation method at 25.0°c. the results enable us to estimate the valueof thermo...

The title compound, (C(16)H(36)N)(3)[Th(NCS)(4)(NO(3))(3)], was obtained from the reaction of Th(NO(3))(4)·5H(2)O with (Bu(4)N)(NCS). The Th(IV) atom is in a ten-coordinate environment of irregular geometry, being bound to the N atoms of the four thio-cyanate ions and to three bidentate nitrate ions. The average Th-N and Th-O bond lengths are 2.481 (10) and 2.57 (3) Å, respectively.

The thymus is influential in establishing and mainta ining elements of immune function throughout life (1, 2) and appears to be required for elicitation of delayed hypersens i t iv i ty reactions, for effective rejection of allografts (3, 4), for resistance to tumor induction (5, 6), and for response to certain classes of antigens (7, 8). The objective of the studies to be reported here was to ...

O u r country is signatory to the Alma Ata Declarat ion which envisages heal th for all by the year 2000 as the ul t imate goal and p r i m a r y heal th care as a n app roach . This seemingly simple and s traight forward s ta tement is a t remendous venture in the field of heal th care a r d is breath taking in its scope. ' H e a l t h ' has been defined not as merely absence of disease bu t a...

Gonococci (Gc) 1 vary widely in their outer m e m b r a n e pro te in II (P.II) const i tu t ions (I , 2). Some Gc exhibi t no P.II; o ther Gc of the same strain have one or several different P.II. Each P.II can be present a lone or in combina t ion with o ther P.II. Several P . I I subuni t molecu la r weight forms have been descr ibed wi th in ind iv idua l s trains and a m o n g different st...