W425800

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[Kinetics on ethanethiol oxidation by potassium permanganate in drinking water].

Yao Liu et al.

Huan jing ke xue= Huanjing kexue, 29(5), 1261-1265 (2008-07-16)

Reaction kinetics of ethanethiol oxidation with potassium permanganate in water was studied, and the effect of ethanethiol oxidation in raw water under coagulation condition has been investigated. The results showed that the oxidation reaction of ethanethiol by potassium permanganate was

Improved sensitivity by use of gas chromatography-positive chemical ionization triple quadrupole mass spectrometry for the analysis of drug related substances.

Wim Van Gansbeke et al.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1001, 221-240 (2015-08-22)

In 2013, the World Anti-Doping Agency (WADA) drastically lowered the minimum required performance levels (MRPLs) of most doping substances, demanding a substantial increase in sensitivity of the existing methods. For a number of compounds, conventional electron impact ionization gas chromatography

Adsorption and degradation of model volatile organic compounds by a combined titania-montmorillonite-silica photocatalyst.

Jiangyao Chen et al.

Journal of hazardous materials, 190(1-3), 416-423 (2011-04-20)

A series of adsorptive photocatalysts, combined titania-montmorillonite-silica were synthesized. The resultant photocatalysts consisted of more and more spherically agglomerated TiO(2) particles with increasing of TiO(2) content, and anatase was the only crystalline phase with nano-scale TiO(2) particles. With increasing of

Application of the multi-parameter SQM harmonic force field, and ESFF harmonic frequencies scaling procedures to the determination of the vibrational spectra of silicon- and sulfur(II)-containing compounds.

Piotr Borowski et al.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 86, 571-585 (2011-12-14)

Multi-parameter scaling techniques, such as Scaled Quantum Mechanical (SQM) force field [J. Am. Chem. Soc. 105 (1983) 7037-7047; J. Phys. Chem. A 102 (1998) 1412-1424] or Effective Scaling Frequency Factor (ESFF) [Chem. Phys. Lett. 446 (2007) 191-198; J. Mol. Spectrosc.

Validation of an isocratic HPLC method to detect 2-fluoro-beta-alanine for the analysis of dihydropyrimidine dehydrogenase activity.

Kinta M Serve et al.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 878(21), 1889-1892 (2010-06-24)

The efficacy of the chemotherapeutic drug 5'-fluorouracil is reduced by catabolism to 2'-fluoro-beta-alanine (FBAL), a three-step reaction in which dihydropyrimidine dehydrogenase (DPD) catalyzes the rate-limiting step. To study in vitro DPD activity, we developed and validated an isocratic, reverse-phase HPLC

In situ microfluidic SERS assay for monitoring enzymatic breakdown of organophosphates.

Vladimir Liberman et al.

Nanoscale, 7(25), 11013-11023 (2015-06-05)

In this paper, we report on a method to probe the breakdown of the organophosphate (OP) simulants o,s-diethyl methyl phosphonothioate (OSDMP) and demeton S by the enzyme organophosphorous hydrolase (OPH) in a microfluidic device by surface enhanced Raman spectroscopy (SERS).

Quantitation of various indolinyl caged glutamates as their o-phthalaldehyde derivatives by high performance liquid chromatography coupled with tandem spectroscopic detections: derivatization, stoichiometry and stability studies.

A Vasanits-Zsigrai et al.

Journal of chromatography. A, 1394, 81-88 (2015-04-05)

Quantification, stability and unique spectroscopic properties of indolinyl-caged glutamates (ICGs), with the o-phthalaldehyde-3-mercaptopropionic acid (OPA-MPA) reagent, were described, at first. As new principle to the field, reactivity and stoichiometry of variously substituted OPA-MPA derivatized ICGs, such as 4-methoxy-7-nitroindolinyl-(MNI-Glu), 4-methoxy-5,7-dinitroindolinyl-(DNI-Glu), 2-dimethylamino-propoxy

Analysis of proteins in biological samples by capillary sieving electrophoresis with postcolumn derivatization/laser-induced fluorescence detection.

Takashi Kaneta et al.

Electrophoresis, 32(9), 1061-1067 (2011-03-31)

Previously, we have demonstrated postcolumn derivatization of proteins separated by capillary sieving electrophoresis (CSE), in which naphthalene-2,3-dicarbaldehyde was employed as a fluorogenic labeling reagent. Standard proteins separated by CSE were reacted with naphthalene-2,3-dicarbaldehyde in the presence of 2-mercaptoethanol (2-ME) which

Using smell to triage samples in point-of-care assays.

Hemakesh Mohapatra et al.

Angewandte Chemie (International ed. in English), 51(44), 11145-11148 (2012-10-06)

Smell of success: Reagent 1 provides the dual readouts of odor (ethanethiol) and fluorescence (derivative of 7-hydroxycoumarin) and can be used in down-selection assays based on smell and quantitative fluorescence assays of the samples that give a positive result. An

[A redox process of ethanethiol group increases formation of beta-sheet structure and amyloid fibrils of wild type human prion protein].

Han Sun et al.

Bing du xue bao = Chinese journal of virology, 28(4), 409-413 (2012-09-18)

In order to explore the potential influences of the disulfide bridge on the physical and chemical properties of PrP protein, the expressed recombinant human wild-type PrP protein was purified for using in an established redox process for the reduction and

Bromodimethylsulfonium bromide (BDMS) mediated dithioacetalization of carbohydrates under solvent-free conditions.

Abu T Khan et al.

Carbohydrate research, 345(15), 2139-2145 (2010-09-08)

A variety of diethyl dithioacetals of sugars can be prepared in very good yields by the reaction of various monosaccharides with ethanethiol in the presence of 3 mol% bromodimethylsulfonium bromide (BDMS) at 0-5°C. Similarly, dipropyl dithioacetal derivatives can also be

Surface functionalities of gold nanoparticles impact embryonic gene expression responses.

Lisa Truong et al.

Nanotoxicology, 7(2), 192-201 (2012-01-24)

Incorporation of gold nanoparticles (AuNPs) into consumer products is increasing; however, there is a gap in available toxicological data to determine the safety of AuNPs. In this study, we utilised the embryonic zebrafish to investigate how surface functionalisation and charge

Analysis of phosphorylated peptides by double pseudoneutral loss extraction coupled with derivatization using N-(4-bromobenzoyl)aminoethanethiol.

Nariyasu Mano et al.

Analytical chemistry, 81(22), 9395-9401 (2009-10-23)

The analysis of post-translational phosphorylation is a crucial step in understanding the mechanisms of many physiological events. Numerous approaches for the development of analytical methods aimed at the detection and quantification of phosphorylated proteins by mass spectrometry have been reported

Simultaneous analysis of amino acids and amines as their o-phthalaldehyde-ethanethiol-9-fluorenylmethyl chloroformate derivatives in cheese by high-performance liquid chromatography.

A Korös et al.

Journal of chromatography. A, 1203(2), 146-152 (2008-08-05)

A high-performance liquid chromatographic method (HPLC) with combined diode array and fluorescence detection of amino acids and amines in various cheese samples is described. The proposal is based on acidic deproteinization, derivatization and gradient optimization studies, resulting in the identification

Benzoylated ethyl 1-thioglycosides: direct preparation from per-O-benzoylated sugars.

Deepak Sail et al.

Carbohydrate research, 357, 47-52 (2012-06-29)

D-Glucose, lactose, maltose, and melibiose were benzoylated with Bz(2)O-Et(3)N reagent to give fully benzoylated β products. Under the same conditions, D-mannose produced a mixture where the β-benzoate predominated. Treatment of the foregoing compounds with EtSH at slightly elevated temperature (50-60°C)

Petrol sniffing interventions among Australian indigenous communities through product substitution: from skunk juice to opal.

Peter d'Abbs et al.

Substance use & misuse, 46 Suppl 1, 99-106 (2011-06-03)

Inhalation of petrol (gasoline) fumes has been prevalent in some Australian Indigenous communities since World War II, and has led to a continuing quest for an effective method of preventing the practice either by modifying the substance or by substituting

Startup and long-term performance of biotrickling filters packed with polyurethane foam and poplar wood chips treating a mixture of ethylmercaptan, H2S, and NH3.

J Hernández et al.

Journal of the Air & Waste Management Association (1995), 63(4), 462-471 (2013-05-22)

Treatment of a mixture of NH3, H2S, and ethylmercaptan (EM) was investigated for more than 15 months in two biotrickling filters packed with poplar wood chips and polyurethane foam. Inlet loads ranging from 5 to 10 g N-NH3 m-3 hr-1

Integration of advanced oxidation processes at mild conditions in wet scrubbers for odourous sulphur compounds treatment.

Esther Vega et al.

Chemosphere, 109, 113-119 (2014-05-31)

The effectiveness of different advanced oxidation processes on the treatment of a multicomponent aqueous solution containing ethyl mercaptan, dimethyl sulphide and dimethyl disulphide (0.5 mg L(-1) of each sulphur compound) was investigated with the objective to assess which one is

Comparison of Aroma-Active Volatiles in Oolong Tea Infusions Using GC-Olfactometry, GC-FPD, and GC-MS.

JianCai Zhu et al.

Journal of agricultural and food chemistry, 63(34), 7499-7510 (2015-08-11)

The aroma profile of oolong tea infusions (Dongdingwulong, DDWL; Tieguanyin, TGY; Dahongpao, DHP) were investigated in this study. Gas chromatography-olfactometry (GC-O) with the method of aroma intensity (AI) was employed to investigate the aroma-active compounds in tea infusions. The results

[Removal technology of typical odorant in drinking water].

Yong Li et al.

Huan jing ke xue= Huanjing kexue, 29(11), 3049-3053 (2009-02-04)

To eliminate the odor in drinking water of one City in China, a study was performed on the typical odorant removal technology and removal processes. Its results showed that as typical odorants, ethanethiol was effectively removed by oxidation and geosmin

Does odour cross contamination alter olfactory thresholds in certain odours?

J A Gaskin et al.

Rhinology, 46(3), 166-169 (2008-10-16)

To determine if 1) there is cross contamination between odours tested on thresholds achieved, 2) a delay period is necessary between testing different odours. Thirty-five subjects underwent threshold testing with phenethyl alcohol (PEA), ethylmercaptan (MER), acetic acid (ACE), and eucalyptol

Persistent adult zebrafish behavioral deficits results from acute embryonic exposure to gold nanoparticles.

Lisa Truong et al.

Comparative biochemistry and physiology. Toxicology & pharmacology : CBP, 155(2), 269-274 (2011-09-29)

As the number of products containing nanomaterials increase, human exposure to nanoparticles (NPs) is unavoidable. Presently, few studies focus on the potential long-term consequences of developmental NP exposure. In this study, zebrafish embryos were acutely exposed to three gold NPs

Comparison of the removal of ethanethiol in twin-biotrickling filters inoculated with strain RG-1 and B350 mixed microorganisms.

Taicheng An et al.

Journal of hazardous materials, 183(1-3), 372-380 (2010-08-10)

This study aims to compare the biological degradation performance of ethanethiol using strain RG-1 and B350 commercial mixed microorganisms, which were inoculated and immobilized on ceramic particles in twin-biotrickling filter columns. The parameters affecting the removal efficiency, such as empty

Anabolic steroids detected in bodybuilding dietary supplements - a significant risk to public health.

V Abbate et al.

Drug testing and analysis, 7(7), 609-618 (2014-10-07)

Twenty-four products suspected of containing anabolic steroids and sold in fitness equipment shops in the United Kingdom (UK) were analyzed for their qualitative and semi-quantitative content using full scan gas chromatography-mass spectrometry (GC-MS), accurate mass liquid chromatography-mass spectrometry (LC-MS), high

Advances in the o-phthalaldehyde derivatizations. Comeback to the o-phthalaldehyde-ethanethiol reagent.

R Hanczkó et al.

Journal of chromatography. A, 1163(1-2), 25-42 (2007-07-04)

The main aims of this work were (a) to present the characteristics and stability of the o-phthalaldehyde (OPA)-ethanethiol (ET) derivatives of 22 amino acids, including the believed-to-be less stable OPA derivatives providing glycine, gamma-aminobutyric acid, beta-alanine, histidine, ornithine, lysine and

Nanocellulose-Zeolite Composite Films for Odor Elimination.

Neda Keshavarzi et al.

ACS applied materials & interfaces, 7(26), 14254-14262 (2015-06-11)

Free standing and strong odor-removing composite films of cellulose nanofibrils (CNF) with a high content of nanoporous zeolite adsorbents have been colloidally processed. Thermogravimetric desorption analysis (TGA) and infrared spectroscopy combined with computational simulations showed that commercially available silicalite-1 and

Identification of nuclear target proteins for S-nitrosylation in pathogen-treated Arabidopsis thaliana cell cultures.

Mounira Chaki et al.

Plant science : an international journal of experimental plant biology, 238, 115-126 (2015-08-11)

Nitric oxide (NO) is a significant signalling molecule involved in the regulation of many different physiological processes in plants. One of the most imperative regulatory modes of action of NO is protein S-nitrosylation--the covalent attachment of an NO group to

Metabolism of methylstenbolone studied with human liver microsomes and the uPA⁺/⁺-SCID chimeric mouse model.

Lore Geldof et al.

Biomedical chromatography : BMC, 28(7), 974-985 (2014-02-06)

Anti-doping laboratories need to be aware of evolutions on the steroid market and elucidate steroid metabolism to identify markers of misuse. Owing to ethical considerations, in vivo and in vitro models are preferred to human excretion for nonpharmaceutical grade substances.

Steric and chain length effects in the (√(3)×√(3))R30° structures of alkanethiol self-assembled monolayers on Au(111).

Edmanuel Torres et al.

Chemphyschem : a European journal of chemical physics and physical chemistry, 12(5), 999-1009 (2011-03-12)

The translational and orientational potential energy surfaces (PESs) of n-alkanethiols with up to four carbon atoms are studied for (√(3)×√(3))R30° self-assembled monolayers (SAMs). The PESs indicate that methanethiol may form SAM structures that are not accessible for long-chain thiols. The

Thermodynamic role of glutathione oxidation by peroxide and peroxybicarbonate in the prevention of Alzheimer's disease and cancer.

Natalie J Galant et al.

The journal of physical chemistry. A, 113(32), 9138-9149 (2009-09-02)

First principle quantum molecular computations have been carried out at the B3LYP/6-31G(d,p) and G3MP2B3 levels of theory on ethyl mercaptan and diethyl disulfide to study their full conformational space. The consequences of molecular axis chirality for the potential energy hypersurface

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