Effects of the biomolecules:Vitamins,proteins,amino acids and surfactans: DTAB, MTOAC, TMSOI,orcinal on upper critical solution temparatures
Üst kritik çözelti sıcaklıkları (UCSTS± 0.05 K) ve phenol + su sistemlerinin karşılıklı çözünebilirlikleri, ayrı ayrı 0.5 millimol $kg^{-1}$ (mm $kg^{-1}$) proteinler (casein, pepsin, yumurta albümini), vitaminler ($B_1$ thiamine, $B_2$-riboflafın, $B_6$-pyridoxine), amino asitler (glycinen, $beta$-alanin, L-leucine) ve yüzey aktif maddeler (dodeciyl trimethylammonium bromide-DTAB, trimethylsulphoxonium iodide-TMSOI, methyl trioctylammonium chlroide-MTOAC, orcinol) için açıklandı. Katkı maddeleri, UCST'leri yaklaşık 0.5 - 2 K azaltmakta ve karşılıklı çözünebilirliklerde çok az zenginleştirme yapmakta, ancak iki -$CH_3$(methyl) ve iki -$CH_2$- (methylene) grupları ile leucine, çözünebilirlikte ihmal edilebilir bir artış sağlamaktadır. -$CH_3$ ve -$CH_2$- grupları daha şiddetli hidrofobik etkileşmeler geliştirmekte, ancak glycine -$N^+H_3$(amino) ve -$COO^-$ (carboxil) gruplar nedeniyle daha şiddetli hidrofilik etkileşmeler, ve tek -$CH_2$- grubu nedeniyle daha zayıf hidrofobik etkileşmeler yaratmaktadır. Leucine, phenol+suya nazaran çözünebilirliği 0.009 mol oranı kadar arttırmakta, USCT'de 0.7 K azaltmaktadır. Katkıların mol oranları 0.002 - 0.005 aralığında tutulmuş olup aminoasitlerin -$CH_3$ grupları yerine casein ve vitaminlerin konulması alt UCST değerlerindeki çözünebilirliği arttırmıştır.
Üst kritik çözelti sıcaklıklarına biyomoleküllerin: Vitaminler, proteinler, amino asitler ve yüzey aktif maddelerin: DTAB,MTOAC,TMSOI,ORCINAL etkileri
Upper critical solution temperatures (UCSTs ± 0.05 K) and mutual solubilities of phenol + water systems are reported separately with 0.5 millimol $kg^{-1}$ (mm $kg^{-1}$) proteins (casein, pepsin, egg-albumin), vitamins ($B_1$-thiamine, $B_2$-riboflavin, $B_6$-pyridoxine), amino acids (glycine, $beta$-alanine, L-leucine) and surfactants (dodecyl trimethylammonium bromide-DTAB, trimethylsulphoxonium iodide-TMSOI, methyltrioctylammonium chloride-MTOAC, orcinol). The additives decrease the UCSTs by about 0.50-2 0C with slight enhancement in mutual solubilities but the leucine with two –$CH_3$ (methyl) and two -$CH_2$- (methylene) groups produce negligible increase in the solubilities. The –CH3 and -$CH_2$- groups develop stronger hydrophobic interactions but the glycine develops stronger hydrophilic interactions due to –$N^+H_3$ (amino) and –$COO^-$ (carboxylic) groups and weaker hydrophobic due to single –$CH_2$- group. The leucine increases the solubility by 0.009 mole fractions with a 0.7 0C decrease in USCT as compared to phenol-water. The mole fractions of additives restricted to 0.002 to 0.005 range, the conjugations of casein and vitamins in place of –$CH_3$ groups of amino acids enhance the solubility with lower UCST values.
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- ISSN: 1301-9724
- Yayın Aralığı: Yılda 4 Sayı
- Başlangıç: 1998
- Yayıncı: -
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