241032

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Multisite binding of a general anesthetic to the prokaryotic pentameric Erwinia chrysanthemi ligand-gated ion channel (ELIC).

Radovan Spurny et al.

The Journal of biological chemistry, 288(12), 8355-8364 (2013-02-01)

Pentameric ligand-gated ion channels (pLGICs), such as nicotinic acetylcholine, glycine, γ-aminobutyric acid GABA(A/C) receptors, and the Gloeobacter violaceus ligand-gated ion channel (GLIC), are receptors that contain multiple allosteric binding sites for a variety of therapeutics, including general anesthetics. Here, we

Optimization of a novel procedure for determination of VOCs in water and human urine samples based on SBSE coupled with TD-GC-HRMS.

Natalia Jakubowska et al.

Journal of chromatographic science, 47(8), 689-693 (2009-09-24)

In this study, stir-bar sorptive extraction and thermal desorption followed by gas chromatography coupled with high resolution mass spectrometry was applied for determination of halo-organic compounds (bromodichloromethane, dibromochloromethane, bromoform, and tetrachloroethylene) in water and human urine samples. Time of extraction

Tribromomethane exposure and dietary folate deficiency in the formation of aberrant crypt foci in the colons of F344/N rats.

David R Geter et al.

Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 43(9), 1405-1412 (2005-06-01)

Folate and folic acid are forms of the B vitamin that are involved in the synthesis, repair, and functioning of DNA and are required for the production and maintenance of cells. Low levels of folate have been associated with several

Ultrafast observation of isomerization and complexation in the photolysis of bromoform in solution.

Stacey L Carrier et al.

The journal of physical chemistry. A, 114(3), 1548-1555 (2009-12-09)

Ultrafast photolysis of bromoform (CHBr(3)) with a 267 nm pulse of light followed by broadband transient electronic absorption identifies the photoproducts and follows their evolution in both neat bromoform and cyclohexane solutions. In neat bromoform, a species absorbing at 390

Global sampling of the photochemical reaction paths of bromoform by ultrafast deep-UV through near-IR transient absorption and ab initio multiconfigurational calculations.

S K Pal et al.

The Journal of chemical physics, 138(12), 124501-124501 (2013-04-06)

Ultrafast deep-ultraviolet through near infrared (210-950 nm) transient absorption spectroscopy complemented by ab initio multiconfigurational calculations offers a global description of the photochemical reaction pathways of bromoform following 255-nm excitation in methylcyclohexane and acetonitrile solutions. Photoexcitation of CHBr3 leads to

Trihalomethanes in chlorine and bromine disinfected swimming pools: air-water distributions and human exposure.

Carolina Lourencetti et al.

Environment international, 45, 59-67 (2012-05-11)

This first study of trihalomethanes (THMs) in swimming pools using bromine agents for water disinfection under real conditions shows that the mixtures of these compounds are largely dominated by bromoform in a similar process as chloroform becomes the dominant THM

Determination of trihalomethanes in waters by ionic liquid-based single drop microextraction/gas chromatographic/mass spectrometry.

Eva Aguilera-Herrador et al.

Journal of chromatography. A, 1209(1-2), 76-82 (2008-09-27)

A simple, rapid, solventless method for the determination of trihalomethanes (THMs) (chloroform, bromodichloromethane, dibromochloromethane and bromoform) in water samples is presented. The analytes are extracted from the headspace of the aqueous matrix into a 2 microL drop of the ionic

Application of hollow fiber liquid phase microextraction for simultaneous determination of regulated and emerging iodinated trihalomethanes in drinking water.

A Domínguez-Tello et al.

Journal of chromatography. A, 1402, 8-16 (2015-06-01)

Trihalomethanes (THMs) are regulated disinfection by-products (DBPs) most commonly analyzed in quality control water supply due to their harmful effects on health. However, few data exist about the content of emerging iodo-trihalomethanes (I-THMs) which are present in drinking water at

Development of normal human colon cell cultures to identify priority unregulated disinfection by-products with a carcinogenic potential.

A B DeAngelo et al.

Water science and technology : a journal of the International Association on Water Pollution Research, 56(12), 51-55 (2007-12-14)

Research was initiated to develop an in vitro system to identify disinfection by-products with a potential to transform normal human colonocytes into malignant cells. Tribromomethane and bromochloroacetic acid, rodent colon carcinogens, dibromonitromethane and tribromonitromethane, recently identified in drinking water, and

Trihalomethanes in Lisbon indoor swimming pools: occurrence, determining factors, and health risk classification.

Zelinda Isabel Silva et al.

Journal of toxicology and environmental health. Part A, 75(13-15), 878-892 (2012-07-14)

Characterization of water quality from indoor swimming pools, using chorine-based disinfection techniques, was performed during a 6-mo period to study the occurrence, distribution, and concentration factors of trihalomethanes (THM). Several parameters such as levels of water THM, water and air

Injectable biocompatible poly(2-oxazoline) hydrogels by strain promoted alkyne-azide cycloaddition.

Jong-Ryul Park et al.

Biointerphases, 16(1), 011001-011001 (2021-01-07)

Poly(2-alkyl-2-oxazoline) (PAOx) hydrogels are tailorable synthetic materials with demonstrated biomedical applications, thanks to their excellent biocompatibility and tunable properties. However, their use as injectable hydrogels is challenging as it requires invasive surgical procedures to insert the formed hydrogel into the

Episodic trihalomethane species and levels in tap water at a start of operation of advanced treatment in Osaka Prefectural water supplies.

Kohji Yamamoto et al.

Bulletin of environmental contamination and toxicology, 83(5), 674-676 (2009-05-29)

Dramatic changes in trihalomethanes of tap water caused by decreasing the chlorine dose from to break-point to zero at a pre-chlorination could be found during several years from starting the advanced treatment in Osaka Prefectural water utilities (from 1998 to

Impact of groundwater surface storage on chlorination and disinfection by-product formation.

R K Padhi et al.

Journal of water and health, 13(3), 838-847 (2015-09-01)

The change in water quality arising from the open storage of groundwater (GW) and its impact on chlorination and chlorination by-product formation were investigated. Water quality descriptors, such as temperature, pH, chlorophyll, and dissolved oxygen contents of GW undergo substantial

Cancer risk assessment from exposure to trihalomethanes in tap water and swimming pool water.

Mallika Panyakapo et al.

Journal of environmental sciences (China), 20(3), 372-378 (2008-07-04)

We investigated the concentration of trihalomethanes (THMs) in tap water and swimming pool water in the area of the Nakhon Pathom Municipality during the period April 2005-March 2006. The concentrations of total THMs, chloroform, bromodichloromethane, dibromochloromethane and bromoform in tap

A calorimetric study on the binding of six general anesthetics to the hydrophobic core of a model protein.

Tao Zhang et al.

Biophysical chemistry, 113(2), 169-174 (2004-12-25)

The thermodynamic parameters underlying the binding of six volatile general anesthetics to the hydrophobic core of the four-alpha-helix bundle (Aalpha(2)-L38M)(2) are determined using isothermal titration calorimetry. Chloroform, bromoform, trichloroethylene, benzene, desflurane and fluroxene are shown to bind to the four-alpha-helix

Reverse dosimetry: interpreting trihalomethanes biomonitoring data using physiologically based pharmacokinetic modeling.

Yu-Mei Tan et al.

Journal of exposure science & environmental epidemiology, 17(7), 591-603 (2006-11-17)

Biomonitoring data provide evidence of exposure of environmental chemicals but are not, by themselves, direct measures of exposure. To use biomonitoring data in understanding exposure, physiologically based pharmacokinetic (PBPK) modeling can be used in a reverse dosimetry approach to assess

Removal of trihalomethane from chlorinated seawater using gamma radiation.

R Rajamohan et al.

Environmental science and pollution research international, 22(23), 18772-18778 (2015-07-23)

Chlorine addition as a biocide in seawater results in the formation of chlorination by-products such as trihalomethanes (THMs). Removal of THMs is of importance as they are potential mutagenic and carcinogenic agents. In this context, a study was conducted that

Modeling daily variation of trihalomethane compounds in drinking water system, Houston, Texas.

Embarka Chaib et al.

Journal of hazardous materials, 151(2-3), 662-668 (2007-07-31)

Total trihalomethanes (TTHM) concentrations vary widely and periodically between 70 and 130 ppb. Data from the National Environmental Services Laboratory, Houston, Texas indicate that pH and free residual chlorine contribute minimally to the wide variability of TTHM levels. Temperature variation

Formation of dimethylketene and methacrolein by reaction of the CH radical with acetone.

Fabien Goulay et al.

Physical chemistry chemical physics : PCCP, 15(11), 4049-4058 (2013-02-14)

The reaction of the methylidyne radical (CH) with acetone ((CH(3))(2)C[double bond, length as m-dash]O) is studied at room temperature and at a pressure of 4 Torr (533.3 Pa) using a multiplexed photoionization mass spectrometer coupled to the tunable vacuum ultraviolet

Spectroscopic and computational studies of matrix-isolated iso-CHBr3: structure, properties, and photochemistry of iso-bromoform.

Lisa George et al.

The Journal of chemical physics, 135(12), 124503-124503 (2011-10-07)

Iso-polyhalomethanes are known reactive intermediates that play a pivotal role in the photochemistry of halomethanes in condensed phases. In this work, iso-bromoform (iso-CHBr(3)) and its deuterated isotopomer were characterized by matrix isolation infrared and UV/visible spectroscopy, supported by ab initio

Evaluation of the impact of the exposure route on the human kinetic adjustment factor.

M Valcke et al.

Regulatory toxicology and pharmacology : RTP, 59(2), 258-269 (2010-10-26)

The objective of this study was to assess the impact of the exposure route on the human kinetic adjustment factor (HKAF), for which a default value of 3.16 is used in non-cancer risk assessment. A multi-route PBPK model was modified

Formation of bromoform in irradiated titanium dioxide suspensions with varying photocatalyst, dissolved organic carbon and bromide concentrations.

Luis A Tercero Espinoza et al.

Water research, 43(17), 4143-4148 (2009-07-25)

We report the formation of bromoform in TiO(2) suspensions (P25) under simulated solar UV irradiation at different concentrations of photocatalyst (0.5-1.5 g L(-1)) as well as initial concentrations of bromide ions (1-3mg L(-1)) and 2,4-dihydroxybenzoic acid (2-10mg L(-1)). The extent

Simulating distribution of trihalomethane in tap water in the area receiving a combination of advanced treated water and conventionally treated different source water: 1998, 1999 and 2002 data on Osaka Prefecture and its surrounding cities, Japan.

Kohji Yamamoto et al.

Bulletin of environmental contamination and toxicology, 83(5), 677-680 (2009-05-29)

Empirical equations for explaining trihalomethane (THM) distribution were established based on data on tap water in Osaka City before and after starting the advanced treatment and were represented by the following equations for bromodichloromethane (S(1)), dibromochloromethane (S(2)) and bromoform distribution

Simultaneous quantification of trihalomethanes and haloacetic acids in cheese by on-line static headspace gas chromatography-mass spectrometry.

Maria Jose Cardador et al.

Journal of chromatography. A, 1408, 22-29 (2015-07-19)

Trihalomethanes (THMs) and haloacetic acids (HAAs) are the two most prevalent classes of disinfection by-products (DBPs) that are present in treated water. Four THMs and six HAAs are regulated by several countries in drinking waters but no regulation for these

Bromoform.

IARC monographs on the evaluation of carcinogenic risks to humans, 52, 213-242 (1991-01-01)

Distributions and sea-to-air fluxes of chloroform, trichloroethylene, tetrachloroethylene, chlorodibromomethane and bromoform in the Yellow Sea and the East China Sea during spring.

Zhen He et al.

Environmental pollution (Barking, Essex : 1987), 177, 28-37 (2013-03-08)

Halocarbons including chloroform (CHCl3), trichloroethylene (C2HCl3), tetrachloroethylene (C2Cl4), chlorodibromomethane (CHBr2Cl) and bromoform (CHBr3) were measured in the Yellow Sea (YS) and the East China Sea (ECS) during spring 2011. The influences of chlorophyll a, salinity and nutrients on the distributions

Synthesis of α-tribromomethylamines via Mg-mediated addition of bromoform to imines.

Elumalai Gopi et al.

Organic & biomolecular chemistry, 12(17), 2769-2777 (2014-03-29)

Mg-mediated addition of bromoform to electron deficient imines such as N-sulfonylimines affords α-tribromomethylated N-sulfonylamines in good to excellent yields. The procedure could be further simplified by transforming the imine precursors, α-sulfonyl-N-tosyl- and Boc-amines, in one pot to the corresponding α-tribromomethyl

[Contamination by disinfection byproducts (DPBs) and microbiological quality of dialysis water: a study in an Italian hospital dialysis service].

Angelo Viti et al.

Igiene e sanita pubblica, 62(2), 173-187 (2007-01-09)

Maintaining a high standard of quality of dialysis fluid has been shown to be difficult. For this reason, an evaluation of the microbiological quality (total bacterial count at 22 degrees C and 37 degrees C, pyrogenic Pseudomonas, Staphylococcus, Acinetobacter and

Genotoxicity of drinking water disinfection by-products (bromoform and chloroform) by using both Allium anaphase-telophase and comet tests.

Messaouda Khallef et al.

Cytotechnology, 67(2), 207-213 (2013-12-24)

Genotoxic effects of bromoform and chloroform, disinfection by-products of the chlorination of drinking water, were examined by using mitotic index (MI), mitotic phase, chromosome aberrations (CAs) and comet assay on root meristematic cells of Allium cepa. Different concentrations of bromoform

A chemical dynamics study on the gas phase formation of thioformaldehyde (H2CS) and its thiohydroxycarbene isomer (HCSH).

Srinivas Doddipatla et al.

Proceedings of the National Academy of Sciences of the United States of America, 117(37), 22712-22719 (2020-08-30)

Complex organosulfur molecules are ubiquitous in interstellar molecular clouds, but their fundamental formation mechanisms have remained largely elusive. These processes are of critical importance in initiating a series of elementary chemical reactions, leading eventually to organosulfur molecules-among them potential precursors

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