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C A Long et al.
Radiology, 180(1), 47-49 (1991-07-01)
The in vitro effectiveness of three new cholesterol gallstone solvents that have a potential for clinical use--ethyl propionate, isopropyl acetate, and n-propyl acetate--was compared with that of the well-known cholesterol solvent methyl tert-butyl ether (MTBE). Ten sets of matched gallstones
J Enrique Cometto-Muñiz et al.
Experimental brain research, 158(2), 196-206 (2004-04-28)
A series of experiments probed into the degree of chemosensory detection additivity exhibited by mixtures of ethyl propanoate and heptanoate in terms of their trigeminal detectability via nasal pungency (i.e., irritation) and eye irritation. Nasal pungency was tested in subjects
Pathogenesis and treatment of gallstones.
A F Hofmann et al.
The New England journal of medicine, 328(25), 1854-1855 (1993-06-24)
S F Zakko et al.
Gastroenterology, 113(1), 232-237 (1997-07-01)
Ethyl propionate and isopropyl acetate were identified as gallstone solvents with more favorable physicochemical properties than the currently used solvent methyl tert-butyl ether (MTBE). In this study, their efficacy and toxicity were compared. To compare efficacy, matched stones from 33
Rachel S Leisso et al.
Physiologia plantarum, 153(2), 204-220 (2014-06-20)
'Soggy breakdown' (SB) is an internal flesh disorder of 'Honeycrisp' apple (Malus × domestica Borkh.) fruit that occurs during low temperature storage. The disorder is a chilling injury (CI) in which visible symptoms typically appear after several weeks of storage
L S Kannegieter et al.
Investigative radiology, 27(2), 140-144 (1992-02-01)
In the first-known application of its kind, shockwave lithotripsy and contact-solvent dissolution of large, calcified gallstone burdens were performed simultaneously with three chemical solvents, each tested separately in an in vitro model, with the combined effects on gallstone eradication examined.
O Esch et al.
Hepatology (Baltimore, Md.), 18(2), 373-379 (1993-08-01)
We performed experiments in anesthetized piglets with two cholesterol gallstone solvents, methyl tert-butyl ether and ethyl propionate, to determine whether blood levels of either solvent would increase during gallbladder instillation of these solvents under conditions simulating gallstone dissolution. The solvent
C Y Chen et al.
Digestive diseases and sciences, 40(2), 419-426 (1995-02-01)
We evaluated the toxic effects of four currently used chemolytic solvents--dimethyl sulfoxide (DMSO, 99%), ethyl propionate (EP, 99%), tetrasodium ethyl-dimethyl tetraacetate (4Na-EDTA, 2%, pH 11), and methyl tert-butyl ether (MTBE, purity = 99.5%) in an animal model. Each solvent was
O Esch et al.
Hepatology (Baltimore, Md.), 16(4), 984-991 (1992-10-01)
Experiments were performed in anesthetized rabbits and piglets to assess gallbladder mucosal injury during irrigation with methyl tert-butyl ether, a C5 ether, or ethyl propionate, a C5 ester--two organic solvents used in the contact dissolution of cholesterol gallstones. In 44
C Clerici et al.
Digestive diseases and sciences, 42(3), 497-502 (1997-03-01)
During topical dissolution of gallstones, solvent can escape to the duodenum causing toxic effects that have not yet been adequately quantified. We compared the local intestinal cytotoxic and systemic hepatotoxic effects of two gallstone solvents, methyl tert-butyl ether and ethyl
J Enrique Cometto-Muñiz et al.
Behavioural brain research, 156(1), 115-123 (2004-10-12)
The investigation explored the olfactory detectability of two chemically and structurally similar esters, ethyl propanoate and ethyl heptanoate, presented singly and in mixtures. Initially, we measured concentration-detection (i.e., psychometric) functions for the odor of ethyl propanoate and ethyl heptanoate presented
Pablo M Cometto et al.
The journal of physical chemistry. A, 113(40), 10745-10752 (2009-09-15)
Kinetics of the reactions of OH radicals and Cl atoms with four saturated esters have been investigated. Rate coefficients for the gas-phase reactions of OH radicals with ethyl propanoate (k(1)), n-propyl propanoate (k(2)), methyl 2-methylpropanoate (k(3)), and ethyl n-butanoate (k(4))
Margaux Cameleyre et al.
Journal of agricultural and food chemistry, 63(44), 9777-9788 (2015-11-04)
This study focused on the impact of five higher alcohols on the perception of fruity aroma in red wines. Various aromatic reconstitutions were prepared, consisting of 13 ethyl esters and acetates and 5 higher alcohols, all at the average concentrations
Paweł Mochalski et al.
Cell biochemistry and biophysics, 71(1), 323-329 (2014-08-16)
Gas chromatography with mass spectrometric detection combined with head-space needle trap extraction as the pre-concentration technique was applied to identify and quantify volatile organic compounds released or metabolised by human umbilical vein endothelial cells. Amongst the consumed species there were
Ahmed M El-Nahas et al.
The journal of physical chemistry. A, 111(19), 3727-3739 (2007-02-09)
The complete basis set method CBS-QB3 has been used to study the thermochemistry and kinetics of the esters ethyl propanoate (EP) and methyl butanoate (MB) to evaluate initiation reactions and intermediate products from unimolecular decomposition reactions. Using isodesmic and isogeitonic
A F Hofmann et al.
Digestive diseases and sciences, 42(6), 1274-1282 (1997-06-01)
Topical dissolution of cholesterol gallbladder stones using methyl tert-butyl ether (MTBE) is useful in symptomatic patients judged too ill for surgery. Previous studies showed that ethyl propionate (EP), a C5 ester, dissolves cholesterol gallstones rapidly in vitro, but differs from
Stéphanie Rollero et al.
Applied microbiology and biotechnology, 99(5), 2291-2304 (2014-11-22)
Volatile compounds produced by yeast during fermentation greatly influence the organoleptic qualities of wine. We developed a model to predict the combined effects of initial nitrogen and phytosterol content and fermentation temperature on the production of volatile compounds. We used
D E Howard et al.
Gastroenterology clinics of North America, 28(1), 133-144 (1999-04-13)
Cholelithiasis is a common disease in the United States associated with significant morbidity. Surgical treatment with cholecystectomy has been increasing with a significant cost to the health care system. Surgical management is not without risk. Cholecystectomy has also been associated
Satyendra Kumar et al.
Acta microbiologica et immunologica Hungarica, 53(2), 219-231 (2006-09-08)
A lipase from the thermophilic isolate Bacillus coagulans BTS-3 was produced and purified. The enzyme was purified 40-fold to homogeneity by ammonium sulfate precipitation and DEAE-Sepharose column chromatography. Its molecular weight was 31 kDa on SDS-PAGE. The purified lipase was
Georgia Lytra et al.
Food chemistry, 194, 196-200 (2015-10-17)
Our study focused on variations in wine aroma perception and molecular composition during tasting over a period of 30min. In parallel, dynamic analytical and sensory methods were applied to study changes in the wines' molecular and aromatic evolution. Dynamic sensory
Philippe Renault et al.
International journal of food microbiology, 207, 40-48 (2015-05-24)
The aim of this work was to study ester formation and the aromatic impact of Torulaspora delbrueckii when used in association with Saccharomyces cerevisiae during the alcoholic fermentation of must. In order to evaluate the influence of the inoculation procedure
Salvatore Guarino et al.
Pest management science, 67(1), 77-81 (2010-10-19)
The red palm weevil (RPW), Rhynchophorus ferrugineus Olivier, accidentally introduced into the European countries facing the Mediterranean basin, is becoming the most serious pest for ornamental palms in the urban environment. In the present work, tests were conducted on the
J J Bergman et al.
Gut, 35(11), 1653-1658 (1994-11-01)
There is a discrepancy between in vitro cholesterol dissolving efficacy of methyl-tert-butyl ether (MTBE) and ethyl propionate and cholesterol gall stone dissolution in vivo. This study investigated whether the presence of bile changes the cholesterol dissolving capacity of MTBE and
S S Kanwar et al.
Acta microbiologica et immunologica Hungarica, 53(2), 195-207 (2006-09-08)
A purified alkaline thermo-tolerant bacterial lipase from Pseudomonas aeruginosa MTCC-4713 was immobilized on a poly (AAc-co-HPMA-cl-MBAm) hydrogel. The hydrogel-bound lipase achieved 93.6% esterification of ethanol and propionic acid (300 mM: 100 mM) into ethyl propionate at temperature 65 degrees C
Sun-Liang Cui et al.
The Journal of organic chemistry, 72(20), 7779-7782 (2007-09-11)
A novel synthesis of Hantzsch-type N-substituted 1,4-dihydropyridines from salicaldehydes, ethyl propiolate, and amines has been developed. Salicaldehydes were treated with ethyl propiolate in the presence of N-methylmorpholine to give ethyl 3-(2-formylphenoxy)propenoates. Three equivalents of ethyl 3-(2-formylphenoxy)propenoates reacted with 1 equiv
Vibeke F Andersen et al.
The journal of physical chemistry. A, 116(21), 5164-5179 (2012-04-25)
Ethyl propionate is a model for fatty acid ethyl esters used as first-generation biodiesel. The atmospheric chemistry of ethyl propionate was investigated at 980 mbar total pressure. Relative rate measurements in 980 mbar N(2) at 293 ± 0.5 K were
Pingxi Xu et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(46), 16592-16597 (2014-10-29)
Insect repellents are important prophylactic tools for travelers and populations living in endemic areas of malaria, dengue, encephalitis, and other vector-borne diseases. DEET (N,N-diethyl-3-methylbenzamide) is a 6-decade-old synthetic repellent, which is still considered the gold standard of mosquito repellents. Mosquitoes
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