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

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

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.

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

An unusual reaction of a bridged triterpenoid α-diketone with acetic anhydride

1991 ◽  
Vol 56 (12) ◽  
pp. 2917-2935 ◽  
Author(s):  
Eva Klinotová ◽  
Václav Křeček ◽  
Jiří Klinot ◽  
Miloš Buděšínský ◽  
Jaroslav Podlaha ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Nmr Spectroscopy ◽  
Acetic Anhydride ◽  
Spectral Methods ◽  
X Ray Diffraction ◽  
X Ray ◽  
Mild Conditions ◽  
Condensation Products ◽  
Unsaturated Lactones ◽  
C Nmr

3β-Acetoxy-21,22-dioxo-18α,19βH-ursan-28,20β-olide (IIIa) reacts with acetic anhydride in pyridine under very mild conditions affording β-lactone IVa and γ-lactones Va and VIIa as condensation products. On reaction with pyridine, lactones Va and VIIa undergo elimination of acetic acid to give unsaturated lactones VIIIa and IXa, respectively. Similarly, the condensation of 20β,28-epoxy-21,22-dioxo-18α,19βH-ursan-3β-yl acetate (IIIb) with acetic anhydride leads to β-lactone IVb and γ-lactone Vb; the latter on heating with pyridine affords unsaturated lactone VIIIb and 21-methylene-22-ketone Xb. The structure of the obtained compounds was derived using spectral methods, particularly 1H and 13C NMR spectroscopy; structure of lactone IVa was confirmed by X-ray diffraction.

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.

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