نتایج جستجو برای: a andl stability
تعداد نتایج: 13513622 فیلتر نتایج به سال:
the determination of formation constants of binary inner transition metal complexes where m=y(iii) or la(iii) or ce(iii) or pr(iii) or nd(iii) or sm (iii) or gd (iii) or dy (iii) or th(iv) andl = creatinine have been carried out using irving–rossotti titration technique in aqueous mediaat different temperatures and at ionic strength. to understand more about the nature ofequilibrium involving i...
fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...
in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...
Myocardial infarction in experimental animals lhas been successfully produced by ligating coronary artery branclhes(l), by injecting obstructing materials into the coronary vessels themselves(2), by external compression(3), and by intravascular electrocoagulation(4). Also, in rats Tlhomas an(l Hartroft were able by dietary means to procluce coronary thrombosis associated witlh myocardial necros...
Electrophysiological techiniques lhave been wiclely uised for the investigation of membrane properties in excitable andl inexcitable tissues. The application of suclh metlho(ds to epitlhelia lhas been extensive, particuilarly for structures that can be mounte(d as an isolated tisstue slheet in special chambers designed to control the bathing soltutions. Witlh respect to the sttu(ly of the renal...
The role of quinones in electron transport has attracted considerable recent interest (27). Coenzyme Q1O, which is present in plant mitochondria, is closely related to the respiratory chain (6), and the very similar benzoquinone, plastoquinone, appears to be involved in photosynthesis (7) Vitanmin K-type naphthoquinones have been imlplicated in respiratory electron transfer (30), oxidative phos...
Americani. The Jensen (genetic) positioin on racial (lifferences in intelligence is well alnswered l)y PettigTew's consi(leration of environmental influences on intelligence ancl iintelligence testing (even tlhotuglh Pettigrew's article precdates the Jenseni controversy). Also consi(lere(d by Pettigrew is the social (lefinition of mental illness andl the impact of social class in creating al)pl...
Given a BIBD(v,k,A) we can construct a directed BIBD(v,k,A*) by writing each block of the BIBO twice, the second time in the reversed order. Here we prove the analagous expected but useful result that if a BIBD(v,b,r ks,k,A) exists, then a RCOBIBD(v,k,A *} also exists. A nonexistence result is also given.
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