نتایج جستجو برای: cl generally
تعداد نتایج: 266083 فیلتر نتایج به سال:
Compounds with polarizable π systems that are susceptible to attack with nucleophiles at C-Hal (Hal = Cl, Br) bonds react with Pd(PPh3)4 to yield net oxidative addition. X-ray structures show that the resulting Pd(PPh3)2Hal groups greatly reduce intermolecular π-π interactions. The Pd-functionalized dyes generally exhibit solution-like absorption spectra in films, whereas their Hal analogues ex...
a comprehensive study on the chemical composition of rainwater was carried out in obuasi, a gold mining town in ghana. rainwater samples were analyzed for major ions (ca2+,mg2+, k+, na+, nh4+, cl-, no3- and so4 2-) and trace metals (fe, al, zn, pb, cr, and cd). the rainwater was typically acidic with a mean ph of 4.76±0.47, which ranged from 4.0 to 5.6. the low ph found in the water suggests t...
To motivate our result, consider Newton’s method N for solving the equationf(z) = 0, wheref is a complex polynomial, f(z) = X$0 aizi. We write N: 5$ X S + S, where Z& is the space of polynomials of degree %d and S is the Riemann sphere C U ~0. Then N(f, z) = Nf(z) = z f(z)/f’(z) is rational over C inf and z; that is, N can be formed from the complex rational operations (+ , , x , +) from the co...
Logics for ‘generally’ are intended to express some vague notions, such as ‘generally’, ‘several’, ‘many’, ‘most’, etc., by means of the new generalized quantifier ∇ and to reason about assertions with ‘generally’ (important issues in qualitative reasoning). We introduce the idea of functional interpretation for ‘generally’ and show that representative functions (akin to Skolem functions) enabl...
با توجه به اهمیت و پتانسیل کاربردی تیوسمی کاربازون ها و کمپلکس های فلزی آن ها، در این کار تحقیقاتی سنتز، مطالعات طیفی، شناسایی ساختاری و بررسی فعالیت ضد باکتریایی یک لیگاند تیوسمی کاربازون و سیزده کمپلکس جدید گزارش شده است. پیریدوکسال تیوسمی کاربازون (h3l+cl-) از تراکم 4-فنیل تیوسمی کاربازید با پیریدوکسال هیدروکلرید تهیه شده و سپس کمپلکس های جدید [zn(oac)(h2o)hl].h2o، [cu(cl)hl].h2o، [ni(oac)(h...
Instrumental neutron activation analysis using the single-comparator method has been used for the multielement determination of essential elements in two main types of Pito brewed locally in Ghana. The precision and accuracy of the analytical method was validated and found to be within 10%. In all, eight different brands of Pito depending on the type of cereal crop used in brewing were analyzed...
We have used ab initio molecular dynamics (AIMD) simulations to study the interaction of water with the NaCl surface. As expected, we find that water forms several ordered hydration layers, with the first hydration layer having water molecules aligned so that oxygen atoms are on average situated above Na sites. In an attempt to understand the dissolution of NaCl in water, we have then combined ...
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