scholarly journals The Solubility of Amino Acids and Two Glycine Peptides in Aqueous Ethanol and Dioxane Solutions

1971 ◽  
Vol 246 (7) ◽  
pp. 2211-2217 ◽  
Author(s):  
Yasuhiko Nozaki ◽  
Charles Tanford
Keyword(s):  
Amino Acids ◽  
Aqueous Ethanol ◽  
Glycine Peptides

scholarly journals Effect of ethanol on rat liver

1967 ◽  
Vol 21 (3) ◽  
pp. 547-556 ◽  
Author(s):  
K.-H. Kiessling ◽  
L. Pilström
Keyword(s):  
Amino Acids ◽  
Nicotinic Acid ◽  
Oxidation Rate ◽  
Aqueous Ethanol ◽  
Casein Hydrolysate ◽  
Liver Mitochondria ◽  
Ethanol Solution ◽  
Functional Changes ◽  
Water Imbibition ◽  
The Matrix

1. Feeding rats with a 15% ethanol solution for several weeks caused structural and functional changes in their liver mitochondria, although their intake of solid food was about the same as that of the controls.2. Attempts were made to counteract these effects of ethanol by increasing the intake of amino acids, vitamins, lipotropic compounds and electrolytes beyond that which is adequate when water is the drinking fluid.3. An increased intake of nicotinic acid, together with aqueous ethanol, caused a further enlargement of the mitochondria above that obtained with ethanol solution alone. the diluted matrix observed with the ethanol and nicotinic acid treatment suggested that water imbibition by the mitochondria caused this further enlargement.4. In rats receiving ethanol fortified with magnesium sulphate and lipotropic compounds (choline, methionine) there was a further increase in mitochondrial size, as compared with those receiving ethanol alone. The matrix was, however, of the same density as in the mitochondria from the rats receiving ethanol alone. the oxidation rate of pyruvate and succinate was unchanged, but α-glycerophosphate and β-hydroxybutyrate were oxidized at a higher rate than in mitochondria from rats drinking ethanol or water.5. When the ethanol solution was supplemented with amino acids (casein hydrolysate), vitamins and electrolytes, the mitochondrial enlargement after 120 days of treatment was less than with ethanol alone and was completely absent after 300 days. the oxidation rate of pyruvate and succinate was, however, not fully restored to normal.

Entropies of transfer of amino acids from water to aqueous ethanol solutions

1970 ◽  
Vol 74 (8) ◽  
pp. 1742-1747 ◽  
Author(s):  
Charles H. Spink ◽  
Michael Auker
Keyword(s):  
Amino Acids ◽  
Aqueous Ethanol

scholarly journals Preliminary Study and Phytochemical Screening of Arum dioscorides Sibth. in Syria

2017 ◽  
Vol 9 (2) ◽  
Author(s):  
Ayoubi Ahmad Mohieddin ◽  
Al-Kurdi Khalil ◽  
Kattah Abdullah ◽  
Trefi Saleh
Keyword(s):  
Amino Acids ◽  
Extraction Method ◽  
Cardiac Glycosides ◽  
Room Temperature ◽  
Aqueous Ethanol ◽  
Cyanogenic Glycosides ◽  
Phytochemical Screening ◽  
Yield Increase ◽  
Significant Yield ◽  
Preliminary Study

Raphides (calcium oxalate needles) were detected in both of Arum dioscorides Sibth. et Sm. leaves and rhizomes. The extraction method of the leaves was optimized, in order to choose the most suitable solvent and method. The best solvent was the following mixture: ethanol, water, hexane, chloroform, acetone 38:16:25:9:12 v/v respectively. In addition, the second best solvent was aqueous ethanol 65%. While for the extraction method itself, sonication aided extraction at room temperature gave significantly better yields than maceration for 72 hours. Moreover, and the suitable time for sonicationaided extraction is 20 minutes. Because there was no significant yield increase through time prolongation after 20 min. Qualitative phytochemical screening of both the leaves and rhizomes was carried out indicating the presence of these phytochemicals in both of leaves and rhizomes: alkaloids, amino acids, phenolic acids, carbohydrates, coumarines, flavonoids, lignans, saponins, sterols, tannins, triterpinoids, pro anthocyanidin, catchins and traces of cyanogenic glycosides. While it has shown the absence of anthranoids and cardiac glycosides.

Exploring the structure and stability of amino acids and glycine peptides in biocompatible ionic liquids

RSC Advances ◽  
2016 ◽  
Vol 6 (23) ◽  
pp. 18763-18777 ◽  
Author(s):  
Awanish Kumar ◽  
Meena Bisht ◽  
Pannuru Venkatesu
Keyword(s):  
Amino Acids ◽  
Ionic Liquids ◽  
Protein Structure ◽  
Biological Systems ◽  
Covalent Bonds ◽  
Peptide Bonds ◽  
Structure And Stability ◽  
Glycine Peptides

Amino acids (AAs) are vital components for a variety of biological systems and can be linked through covalent bonds (or peptide bonds) to form a protein structure.

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