کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7832084 | 1503286 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Volumetric and Refractive Index Behaviour of α-Amino Acids in Aqueous CTAB at Different Temperatures
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Densities (Ï) and refractive indices (nD) of glycine (Gly), DL-alanine (Ala), DL-valine (Val) (0.02, 0.04, 0.06, 0.08, and 0.10 mol·Lâ1) in 0.005 and 0.008 mol·Lâ1 aqueous cetyltrimethylammonium bromide (CTAB) have been measured at 298.15, 303.15, 308.15, and 313.15 K. The density data have been utilized to calculate apparent molar volumes (Ïv), partial molar volumes (Ïv0), at infinite dilution and partial molar volumes of transfer Ïv0(tr) of amino acids. The refractive index data have been used to calculate molar refractivity (RD) of amino acids in aqueous cetyltrimethylammonium bromide. It has been observed that Ïv0 varies linearly with increasing number of carbon atoms in the alkyl chain of amino acids, and hence, was split to get contributions from the zwitterionic end groups (NH3+, COOâ) and methylene group (CH2) of the amino acids. The behaviour of these parameters has been used to investigate the solute-solute, solute-solvent interactions and the effect of cetyltrimethylammonium cation on these interactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Physico-Chimica Sinica - Volume 23, Issue 7, July 2007, Pages 1007-1012
Journal: Acta Physico-Chimica Sinica - Volume 23, Issue 7, July 2007, Pages 1007-1012
نویسندگان
Anwar Ali, S. Sabir, Shahjahan Shahjahan, S. Hyder,