Excess enthalpies of the reactive system ethanol + acetic acid + ethyl acetate + water for chemically equilibrium states at 313.15 K

2018 ◽  
Vol 134 (1) ◽  
pp. 835-841 ◽  
Author(s):  
Alexandra Golikova ◽  
Nikita Tsvetov ◽  
Yuri Anufrikov ◽  
Maria Toikka ◽  
Irina Zvereva ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Ethyl Acetate ◽  
Equilibrium States ◽  
Reactive System ◽  
Excess Enthalpies ◽  
Ethanol Acetic Acid

Excess enthalpies and heat of esterification reaction in ethanol + acetic acid + ethyl acetate + water system at 313.15 K

2019 ◽  
Vol 139 (2) ◽  
pp. 1301-1307 ◽  
Author(s):  
Alexandra Golikova ◽  
Nikita Tsvetov ◽  
Artemiy Samarov ◽  
Maria Toikka ◽  
Irina Zvereva ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Ethyl Acetate ◽  
Water System ◽  
Esterification Reaction ◽  
Excess Enthalpies ◽  
Ethanol Acetic Acid

Evaluation of Excess Molar Enthalpies for a Quaternary Mixture System of Acetic Anhydride, Ethanol, Acetic Acid, and Ethyl Acetate

2012 ◽  
Vol 57 (3) ◽  
pp. 811-816 ◽  
Author(s):  
Laurent Balland ◽  
Imed Ben Talouba ◽  
Nordine Mouhab ◽  
Ahmed Abdelghani-Idrissi
Keyword(s):  
Acetic Acid ◽  
Acetic Anhydride ◽  
Ethyl Acetate ◽  
Excess Molar Enthalpies ◽  
Ethanol Acetic Acid ◽  
Quaternary Mixture ◽  
Mixture System

Effect on Heterorhabditis indica of substances occurring in decomposing palm tissues infested by Rhynchophorus ferrugineus

Nematology ◽  
2003 ◽  
Vol 5 (5) ◽  
pp. 647-652 ◽  
Author(s):  
Abd-Elrahman Monzer ◽  
Randa Abd El-Rahman
Keyword(s):  
Acetic Acid ◽  
Ethyl Acetate ◽  
Entomopathogenic Nematode ◽  
In Vitro Study ◽  
Rhynchophorus Ferrugineus ◽  
Red Palm Weevil ◽  
Heterorhabditis Indica ◽  
Ethanol Acetic Acid ◽  
Candidate Species

AbstractEthanol, acetic acid and ethyl acetate are generated during the degeneration of palm tissues infested by the red palm weevil, Rhynchophorus ferrugineus Oliv. This in vitro study determined the influences of concentrations of 0.05-2% v/v of these substances in distilled water on the behaviour, survival and infectivity of the entomopathogenic nematode Heterorhabditis indica, a candidate species for control of R. ferrugineus. The observed responses of the nematode included normal movement, reversible partial paralysis and death. The estimated LC50 were 1.48, 0.25 and 0.14% for ethanol, acetic acid and ethyl acetate, respectively, but only 0.18% for the equal mixture of all three. Nematodes that survived treatment at the LC50 of each substance showed infectivity and penetration activity comparable to those of control nematodes. We conclude that it will be difficult to control R. ferrugineus using H. indica in the presence of these substances in palm trunks.

Interlaboratory comparison of results of erythrocyte protoporphyrin analysis.

1978 ◽  
Vol 24 (12) ◽  
pp. 2135-2138 ◽  
Author(s):  
K W Jackson
Keyword(s):  
Acetic Acid ◽  
Hydrochloric Acid ◽  
Ethyl Acetate ◽  
Disease Control ◽  
Whole Blood ◽  
Interlaboratory Comparison ◽  
Direct Reading ◽  
Blood Samples ◽  
Erythrocyte Protoporphyrin ◽  
Whole Blood Samples

Abstract Each of 65 laboratories analyzed 10 whole-blood samples for erythrocyte protoporphyrin by one or more of several analytical procedures. These procedures were of two types: (a) extraction of protoporphyrin from the erythrocytes into ethyl acetate/acetic acid, re-extraction into hydrochloric acid, and fluorometric measurement; or (b) direct reading in a portable fluorometer (hematofluorometer), with no pretreatment of the blood sample. Interlaboratory correlation was generally poor, especially between laboratories using extraction procedures. Hematofluorometric results intercorrelated better, but they had a low bias as compared to the extraction approach. Nationwide standardization of the test is required to assure satisfactory interlaboratory performance and to identify laboratories whose results are sufficiently accurate to be used for interpretations according to guidelines set forth by the Center for Disease Control for erythrocyte protoporphyrin testing.

HSCCC Separation of Three Main Compounds from the Crude Extract of Dracocephalum Tanguticum by Using Dimethyl Sulfoxide as Cosolvent

2020 ◽  
Author(s):  
Xue Yang ◽  
Yongling Liu ◽  
Tao Chen ◽  
Nana Wang ◽  
Hongmei Li ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Ethyl Acetate ◽  
Dimethyl Sulfoxide ◽  
Efficient Method ◽  
Crude Extract ◽  
High Speed ◽  
Glacial Acetic Acid ◽  
Butyl Alcohol ◽  
Preparative Hplc ◽  
Counter Current

Abstract Separation of natural compounds directly from the crude extract is a challenging work for traditional column chromatography. In the present study, an efficient method for separation of three main compounds from the crude extract of Dracocephalum tanguticum has been successfully established by high-speed counter-current chromatography (HSCCC). The crude extract was directly introduced into HSCCC by using dimethyl sulfoxide as cosolvent. Ethyl acetate/n-butyl alcohol/0.3% glacial acetic acid (4: 1: 5, v/v) system was used and three target compounds with purity higher than 80% were obtained. Preparative HPLC was used for further purification and three target compounds with purity higher than 98% were obtained. The compounds were identified as chlorogenic acid, pedaliin and pedaliin-6″-acetate.

Measurement of the thermodynamic properties for the reactive system ethylene glycol–acetic acid

2007 ◽  
Vol 258 (2) ◽  
pp. 115-124 ◽  
Author(s):  
Bastian Schmid ◽  
Michael Döker ◽  
Jürgen Gmehling
Keyword(s):  
Acetic Acid ◽  
Thermodynamic Properties ◽  
Ethylene Glycol ◽  
Reactive System
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