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Novel (R)-oxynitrilase sources for the synthesis of (R)-cyanohydrins in diisopropyl ether.
Kiljunen E and Kanerva LT.
Tetrahedron Asymmetry, 8(8), 1225-1234 (1997)
W Dalbey et al.
Journal of toxicology and environmental health, 49(1), 29-43 (1996-09-01)
Two inhalation studies were performed with a vaporized sample of commercial-grade diisopropyl ether (DIPE). In the subchronic study, Sprague-Dawley rats (14/sex) were exposed to 0 (both untreated and sham-exposed controls), 480, 3300, or 7100 ppm DIPE for 6 h/d, 5
Duk Kyung Kim et al.
The Science of the total environment, 430, 246-259 (2012-06-01)
Widespread pollution has been associated with gasoline oxygenates of branched ethers methyl tert-butyl ether (MTBE), di-isopropyl ether (DIPE), ethyl tert-butyl ether (ETBE), and tert-amyl ether (TAME) which enter groundwater. The contaminated plume develops rapidly and treatment for the removal/destruction of
Dar Fu Tai et al.
FEBS letters, 517(1-3), 24-26 (2002-06-14)
The catalytic mechanism of arylamine N-acetyltransferase has been proposed to involve Cys-His-Asp as its catalytic triad. Thiolsubtilisin, a chemically modified enzyme that has a catalytic triad of Cys-His-Asp at the active site, mimics the catalysis of arylamine N-acetyltransferase, serotonin N-acetyltransferase
A Azim et al.
Bioorganic & medicinal chemistry, 9(5), 1345-1348 (2001-05-30)
An efficient lipase catalysed synthesis of optically enriched alpha-halogenated amides with concomitant optical enrichment of the starting alpha-haloesters is described. Candida antarctica lipase (CAL) was found to be a better catalyst over porcine pancreatic lipase (PPL) and Candida cylindracea lipase
Tuomas Mehtiö et al.
Carbohydrate research, 402, 102-110 (2014-12-17)
A series of copolyanhydrides, consisting of 2,3,4,5-tetra-O-acetylgalactaric acid (AGA) and adipic acid (AA) as monomer units, was polymerized. Synthesis of AGA monomer consisted of two steps. First, O-acetylation of galactaric acid secondary hydroxyl groups was performed using acetic anhydride as
R Gonzalez-Olmos et al.
Chemosphere, 71(11), 2098-2105 (2008-02-27)
Methyl tert-butyl ether (MTBE) is the most widely used oxygenate in gasoline blending and has become one of the world's most widespread groundwater and surface water pollutants. Alternative oxygenates to MTBE, namely ethyl tert-butyl ether (ETBE), tert-amyl ether (TAME) and
Attractors in Sequence Space: Peptide Morphing by Directed Simulated Evolution.
Jan A Hiss et al.
Molecular informatics, 34(11-12), 709-714 (2016-01-19)
R van Gijn et al.
Journal of chromatography. B, Biomedical applications, 667(2), 269-276 (1995-05-19)
The staurosporine derivative, N-benzoylstaurosporine (CGP 41 251; I), is a protein kinase C inhibitor that has been selected for phase I clinical evaluation in cancer patients. We have developed a selective and sensitive assay of the drug and three potential
T Sato et al.
Journal of nutritional science and vitaminology, 36(4), 299-309 (1990-08-01)
The thermal conversion of 1 alpha-hydroxyprevitamin D3 (1 alpha-OH-previtamin D3) diacetate to 1 alpha-hydroxyvitamin D3 (1 alpha-OH-vitamin D3) diacetate was investigated in five solvents. The fraction of 1 alpha-OH-vitamin D3 diacetate was calculated from the HPLC peak areas (UV detection)
Toshikazu Yamaoka et al.
Journal of pharmacological and toxicological methods, 76, 83-95 (2015-09-01)
Glutathione (GSH) trapping assays are widely used to predict the post-marketing risk for idiosyncratic drug reactions (IDRs) in the pharmaceutical industry. Although several GSH derivatives have been introduced as trapping reagents for reactive intermediates, more sensitive and selective reagents are
G Arivazhagan et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 105, 102-108 (2013-01-09)
The results of FTIR spectral measurement on equimolar diisopropyl ether-butyric acid binary mixture and quantum chemical calculations on the complex molecule have been presented. Dielectric studies have been carried out on the binary mixture over the entire composition range and
B E Cham et al.
Journal of virological methods, 137(1), 160-163 (2006-07-01)
Many viruses including HIV, hepatitis C and hepatitis B, have an outer lipid envelope which maintains inserted viral peptides in the "correct" functional conformation and orientation. Disruption of the lipid envelope by most solvents destroys infectivity and often results in
P Adlercreutz
Biochimica et biophysica acta, 1163(2), 144-148 (1993-05-13)
Horse liver alcohol dehydrogenase and alpha-chymotrypsin were deposited on a porous support material, Celite. After equilibration at a well-defined water activity, the catalytic activity was measured with diisopropyl ether as reaction medium. The effects of the presence of polyols and
Daniel Menezes-Souza et al.
PloS one, 9(6), e99216-e99216 (2014-06-13)
The search toward the establishment of novel serological tests for the diagnosis of leishmaniasis and proper differential diagnosis may represent one alternative to the invasive parasitological methods currently used to identify infected individuals. In the present work, we investigated the
Luis G Cascão Pereira et al.
Biotechnology and bioengineering, 78(6), 595-605 (2002-05-07)
A kinetic framework is developed to describe enzyme activity and stability in two-phase liquid-liquid systems. In particular, the model is applied to the enzymatic production of benzaldehyde from mandelonitrile by Prunus amygdalus hydroxynitrile lyase (pa-Hnl) adsorbed at the diisopropyl ether
G Flesch et al.
Journal of chromatography. B, Biomedical applications, 657(1), 155-161 (1994-07-01)
A specific and sensitive liquid chromatographic assay for CGP 53,437 (I), a potent HIV protease inhibitor, is described. The method is based on a deproteinization step, followed by a liquid-liquid extraction with diisopropyl ether. Then a deprotection step of the
The influence of reaction conditions on the photooxidation of diisopropyl ether.
Collins EM, et al.
Journal of Photochemistry and Photobiology A: Chemistry, 176(1), 86-97 (2005)
Guenther Kufner et al.
Clinical chemistry and laboratory medicine, 43(2), 183-191 (2005-04-22)
An increased concentration of erythrocyte protoporphyrin-IX in whole blood or erythrocytes is a valuable diagnostic indicator for acquired porphyrias, e.g., iron deficiency anemia and lead poisoning, and for inherited porphyrias. We developed a spectrophotometric micromethod for determining erythrocyte protoporphyrin-IX. In
Ali N Saleemi et al.
International journal of pharmaceutics, 430(1-2), 56-64 (2012-03-28)
Pharmaceutical regulatory bodies require minimal presence of solvent in an active pharmaceutical ingredient (API) after crystallization. From a processing point of view bigger crystals with minimal agglomeration and uniform size distribution are preferred to avoid solvent inclusion and for improved
Abdulrhman A Al-Majed et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 989, 104-111 (2015-03-31)
A highly selective, sensitive, and rapid microemulsion liquid chromatography (MELC) method was developed and validated for the simultaneous determination of a novel type of dopamine receptor antagonist LE300 and its N-methyl metabolite in mouse sera. LE300, its N-methyl metabolite, and
Cross-linked enzyme aggregates (CLEAs): stable and recyclable biocatalysts.
Sheldon RA.
Biochemical Society Transactions, 35(6) (2007)
Hans Peter H Arp et al.
Environmental science & technology, 38(20), 5405-5412 (2004-11-17)
The gasoline oxygenate methyl tert-butyl ether (MTBE) has become one of the world's mostwidespread groundwater and surface water contaminants. As a result, there has been increasing interest in the environmental behavior of MTBE and its degradation products, mainly tert-butyl formate
A Hickel et al.
Biotechnology and bioengineering, 65(4), 425-436 (1999-10-03)
A novel recycle reactor has been designed to determine the interfacial activity of hydroxynitrile lyase in a diisopropyl ether (DIPE)/water two-phase system. The reactor provides a known interfacial area. Enzyme activity toward mandelonitrile cleavage is continuously measured in the reactor
Wen-Zhen Zhu et al.
International journal of pharmaceutics, 395(1-2), 260-265 (2010-05-25)
This article presents the preparation of nanoparticles of amorphous cefuroxime axetil (CFA) in a microporous tube-in-tube microchannel reactor (MTMCR). The experimental results indicated that CFA particle with a tunable size of 400-1400 nm could be achieved under a high throughput
Molecular structure and conformation of diisopropyl ether: a gas electron diffraction investigation.
Takeuchi H, et al.
The Journal of Physical Chemistry, 91(5), 1015-1019 (1987)
Unimolecular metastable decompositions of 1,1,1-trifluoroisopropyl methyl ether [CF3(CH3)CHOCH3] upon electron ionization.
Susumu Tajima et al.
Rapid communications in mass spectrometry : RCM, 17(5), 503-506 (2003-02-19)
G Arivazhagan et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 81(1), 172-177 (2011-07-08)
FTIR and 13C NMR spectral studies have been carried out on diisopropyl ether-propionic acid binary mixture to probe the molecular interactions and stoichiometry of complexation. Density functional theory (DFT) calculations of vibrational frequencies of pure acid and ether-acid binary mixtures
I Linhart et al.
Toxicology and applied pharmacology, 136(1), 155-160 (1996-01-01)
Biotransformation of acrolein (ACR) was studied in vivo in the rat following inhalation and ip administration. The major and minor urinary metabolites were 3-hydroxypropylmercapturic acid (HPMA) and 2-carboxyethylmercapturic acid (CEMA), respectively. Male Wistar rats were exposed to ACR, 23, 42
Mònica Rosell et al.
Journal of chromatography. A, 1132(1-2), 28-38 (2006-08-15)
A new protocol for the simultaneous determination of methyl tert-butyl ether (MTBE); its main degradation products: tert-butyl alcohol (TBA) and tert-butyl formate (TBF); other gasoline additives, oxygenate dialkyl ethers: ethyl tert-butyl ether (ETBE), tert-amyl methyl ether (TAME) and diisopropyl ether
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