296856

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Showing 1-30 of 49 results for "296856" within Papers

Simultaneous determination of methyl tert-butyl ether, its degradation products and other gasoline additives in soil samples by closed-system purge-and-trap gas chromatography-mass spectrometry.

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

Predicting the behaviour of lipases in low-water media.

P J Halling

Biochemical Society transactions, 25(1), 170-174 (1997-02-01)

Purification and analysis of gangliosides.

S Ladisch et al.

Methods in enzymology, 312, 135-145 (2000-11-09)

Synthesis, crystal structure and biological activity of novel anthranilic diamide insecticide containing alkyl ether group.

Yu Zhao et al.

Molecular diversity, 16(4), 711-725 (2012-11-01)

In searching for environmentally benign insecticides with high activity, low toxicity and low residue, two series of novel anthranilic diamide containing methyl ether and isopropyl ether group were designed and synthesized. All of the compounds were characterized by (1)H NMR

Control of the misuse of testosterone in castrated horses based on an international threshold in plasma.

Emmie N M Ho et al.

Drug testing and analysis, 7(5), 414-419 (2014-06-04)

Testosterone is an endogenous steroid produced primarily in the testes. Trace levels of testosterone are found in urine samples from geldings, as testosterone is also secreted by the adrenal. An international threshold of free and conjugated testosterone in urine (20 ng/mL)

Results of long-term carcinogenicity bioassays on tert-amyl-methyl-ether (TAME) and di-isopropyl-ether (DIPE) in rats.

Fiorella Belpoggi et al.

Annals of the New York Academy of Sciences, 982, 70-86 (2003-02-04)

Tert-amyl-methyl ether (TAME) was administered by gavage in extra virgin olive oil solution at concentrations of 750, 250, or 0 mg/kg bw to groups of 100 male and 100 female Sprague-Dawley rats 8 weeks old at the start of the

GBM Derived Gangliosides Induce T Cell Apoptosis through Activation of the Caspase Cascade Involving Both the Extrinsic and the Intrinsic Pathway.

Barun Mahata et al.

PloS one, 10(7), e0134425-e0134425 (2015-08-01)

Previously we demonstrated that human glioblastoma cell lines induce apoptosis in peripheral blood T cells through partial involvement of secreted gangliosides. Here we show that GBM-derived gangliosides induce apoptosis through involvement of the TNF receptor and activation of the caspase

Catalytic osmium tetroxide oxidation of olefins: cis-1,2-cyclohexanediol

VanRheenen V, et al.

Organic Syntheses, 58, 43-43 (1978)

Atmospheric chemistry of automotive fuel additives: diisopropyl ether.

Wallington TJ, et al.

Environmental Science & Technology, 27(1), 98-104 (1993)

Abortion after deliberate Arthrotec® addition to food. Mass spectrometric detection of diclofenac, misoprostol acid, and their urinary metabolites.

Bernhard Watzer et al.

International journal of legal medicine, 129(4), 759-769 (2014-12-20)

Arthrotec(®) (AT) is a combination of diclofenac, a nonsteroidal anti-inflammatory drug (NSAID), and misoprostol (MP), a synthetic analogue of prostaglandin E1 (PGE1). MP is a lipophilic methyl ester prodrug. It is readily metabolized to the biologically active misoprostol acid (MPA).

Biotransformation of acrolein in rat: excretion of mercapturic acids after inhalation and intraperitoneal injection.

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

Detomidine and the combination of detomidine and MK-467, a peripheral alpha-2 adrenoceptor antagonist, as premedication in horses anaesthetized with isoflurane.

Soile Ae Pakkanen et al.

Veterinary anaesthesia and analgesia, 42(5), 527-536 (2014-12-23)

To investigate MK-467 as part of premedication in horses anaesthetized with isoflurane. Experimental, crossover study with a 14 day wash-out period. Seven healthy horses. The horses received either detomidine (20 μg kg(-1) IV) and butorphanol (20 μg kg(-1) IV) alone (DET) or with MK-467 (200 μg kg(-1)

Selective microemulsion liquid chromatography analysis of dopamine receptor antagonist LE300 and its N-methyl metabolite in mouse sera by using a monolithic silica column.

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

2-Acetyl-1,3-cyclopentanedione

Merenyi F and Nilsson M

Organic Syntheses, 52, 1-1 (1972)

Air-water transfer of MTBE, its degradation products, and alternative fuel oxygenates: the role of temperature.

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

Pharmacokinetics and pharmacodynamics of 3,3'-diindolylmethane (DIM) in regulating gene expression of phase II drug metabolizing enzymes.

Tien-Yuan Wu et al.

Journal of pharmacokinetics and pharmacodynamics, 42(4), 401-408 (2015-07-04)

3,3'-Diindolylmethane (DIM) has been investigated as a potential anti-cancer chemopreventive agent in many preclinical and clinical studies. In this study, we sought to characterize the pharmacokinetics of DIM and to build a pharmacokinetic (PK) and pharmacodynamic (PD) model of the

Enhancing crystalline properties of a cardiovascular active pharmaceutical ingredient using a process analytical technology based crystallization feedback control strategy.

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

A spectrophotometric micromethod for determining erythrocyte protoporphyrin-IX in whole blood or erythrocytes.

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

Hydroxynitrile lyase at the diisopropyl ether/water interface: evidence for interfacial enzyme activity.

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

A kinetic model for enzyme interfacial activity and stability: pa-hydroxynitrile lyase at the diisopropyl ether/water interface.

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

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)

Molecular interaction study of the diisopropyl ether-propionic acid mixture by spectroscopic and dielectric studies.

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

Quantitative determination of CGP 53,437, a new HIV protease inhibitor, in plasma by high-performance liquid chromatography and fluorescence detection.

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

Liquid antisolvent preparation of amorphous cefuroxime axetil nanoparticles in a tube-in-tube microchannel 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

Comprehensive thin layer chromatography×gas chromatography using headspace sampling modulation-A case study on fatty acid composition analysis.

Mitja Križman et al.

Journal of chromatography. A, 1405, 149-155 (2015-06-24)

The recently developed comprehensive TLC×GC technique using headspace sampling is presented. The main advantage of this approach, as demonstrated in lipid analysis, is the possibility to include a transesterification step of glycerides into fatty acid methyl ester derivatives (FAME) because

Smart morpholine-functional statistical copolymers synthesized by nitroxide mediated polymerization

Lessard BH, et al.

Polymer, 53(25), 5649-5656 (2012)

Activation of enzymes in organic media at low water activity by polyols and saccharides.

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

Delipidation of a hepadnavirus: Viral inactivation and vaccine development.

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

Mapping B-cell epitopes for the peroxidoxin of Leishmania (Viannia) braziliensis and its potential for the clinical diagnosis of tegumentary and visceral leishmaniasis.

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

Effect of solvents on the thermal isomerization of 1 alpha-hydroxyprevitamin D3 diacetate to 1 alpha-hydroxyvitamin D3 diacetate.

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)

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