A study of free energy relationships in the urea-sodium sulfate-water system.
نویسندگان
چکیده
Activity coefficients for each of the components, urea and sodium sulfate, in their ternary mixtures with water have been obtained using the isopiestic vapor pressure method over the concentration ranges 0 to 19.4 molal urea and 0 to 2.4 molal Na2S04. At the lower molalities of the solutes, there is mutual salting-in of the components which changes to salting-out at 0.4 molal Na2SQ4 and 5 molal urea. These results are considered as a model for certain interactions in the denaturation of proteins by electrolytes.
منابع مشابه
ررسی اثر مخلوط مواد فعال سطحی روی پدیده پیوند قطره
In this research, effect of bicomponent mixed surfactant was studied on drop interface coalescence phenomenon in ambient temperature. First basic chemical system was water and toluene and 0.01 gr of sodium dodecyle sulfate (SDS) and the second basic system was water and toluene and 0.01 gr of cethyl trimethy amonium bromide (CTAB). Various weight fractions of second surfactant including 2-hepta...
متن کاملThe effect of water containing sodium sulfate ions on strength of concrete of aquaculture ponds and channels
Aquaculture is among the oldest occupations of human being. Over the past quarter of century, the aquaculture industry has grown rapidly. The effect of water containing sodium sulfate on long term compressive strength of concrete of fishing ponds and channels is investigated in this paper. Aim of this paper was to analyze the strength of concrete channels and of aquaculture which are in direct ...
متن کاملComparison of Catalytic Effect of Alkali and Alkaline Earth Metals Hydrogen Sulfate: As the Promoter for an Efficient Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones under Solvent-Free Conditions
Alkali and alkaline earth metals hydrogen sulfate catalyzed the one-pot three component condensation reactions of aldehydes, 1,3-dicarbonyl compounds and urea or thiourea under solvent-free conditions leading to 3,4-dihydropyrimidin-2(1H)-ones in high yields at 80 °C. Our results showed that Biginelli reaction not only is pH dependent, but the cation of catalyst plays an importan...
متن کاملThe effect of water containing sodium sulfate ions on strength of concrete of aquaculture ponds and channels
Aquaculture is among the oldest occupations of human being. Over the past quarter of century, the aquaculture industry has grown rapidly. The effect of water containing sodium sulfate on long term compressive strength of concrete of fishing ponds and channels is investigated in this paper. Aim of this paper was to analyze the strength of concrete channels and of aquaculture which are in direct ...
متن کاملتأثیر تیمارهای مختلف پرایمینگ بذر بر عملکرد و اجزای عملکرد عدس در شرایط تنش خشکی آخر فصل
To study the effect of seed priming on seedling emergence characteristics of lentil and evaluate its interaction with drought stress at flowering stage, an experiment was carried out as split plot in a randomized complete block design with three replications at research station of Bu-Ali Sina University, Hamedan, Iran. The main factor consisted drought stress with two levels (conventional irrig...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- The Journal of biological chemistry
دوره 245 9 شماره
صفحات -
تاریخ انتشار 1970