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Showing 1-30 of 33 results for "E2425000" within Papers
Potential estrogenic effect(s) of parabens at the prepubertal stage of a postnatal female rat model.
Thuy T B Vo et al.
Reproductive toxicology (Elmsford, N.Y.), 29(3), 306-316 (2010-02-06)
In this study, a female pubertal assay on the effects of parabens, including methyl-, ethyl-, propyl-, isopropyl-, butyl-, and isobutylparaben, was performed in a female Sprague-Dawley rat model during the juvenile-peripubertal period. The rats were orally treated with these parabens
Antonis Myridakis et al.
Analytical and bioanalytical chemistry, 407(9), 2509-2518 (2015-02-04)
Phthalates, bisphenol A (BPA) and parabens (PBs), organic chemicals widely used in everyday products, are considered to be endocrine disruptors. We propose a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination of seven phthalate metabolites, six PBs and BPA
K L Pedersen et al.
Pharmacology & toxicology, 86(3), 110-113 (2001-02-07)
The widely used phenolic preservatives ethylparaben, propylparaben, butylparaben and their common metabolite p-hydroxybenzoic acid were tested for their ability to evoke an oestrogenic response in vivo. Yolk protein induction in sexually immature rainbow trout was used as an oestrogen-specific endpoint
Marina Gorga et al.
Journal of chromatography. A, 1352, 29-37 (2014-06-10)
A novel fully automated method based on dual column switching using turbulent flow chromatography followed by liquid chromatography coupled to tandem mass spectrometry (TFC-LC-MS/MS) was applied for the determination of endocrine disruptors (EDCs) and related compounds in sediment and sewage
Maw-Rong Lee et al.
Journal of chromatography. A, 1120(1-2), 244-251 (2006-03-04)
This study evaluated supercritical fluid extraction (SFE) combined with liquid chromatography-mass spectrometry (LC-MS) to determine trace preservatives and antioxidants including methylparaben (MP), ethylparaben (EP), propylparaben (PP), butylparaben (BP), butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), alpha-tocopherol (alpha-t) and alpha-tocopherol acetate (alpha-ta)
R Di Giovannandre et al.
Journal of chromatography. B, Biomedical sciences and applications, 751(2), 365-369 (2001-03-10)
We have developed a high-performance liquid chromatographic-UV-Vis-diode-array detection (HPLC-DAD) method for the determination of ethyl-p-hydroxybenzoate, a hydrolytic degradation product of the synthetic protease inhibitor, gabexate-mesilate ethyl-p-(6-guanidinohexanoyloxy) benzoate methanesulfonate (GM) (FOY) in sow pancreatic juice. Methyl-p-hydroxybenzoate (I) was used as the
Esther Pérez et al.
The Journal of biological chemistry, 279(41), 42584-42592 (2004-08-05)
A few mycobacterial species, most of which are pathogenic for humans, produce dimycocerosates of phthiocerol (DIM) and of glycosylated phenolphthiocerol, also called phenolglycolipid (PGL), two groups of molecules shown to be important virulence factors. The biosynthesis of these molecules is
C Lemini et al.
Toxicology and industrial health, 20(6-10), 123-132 (2005-06-09)
The alkyl esters of p-hydroxybenzoic acid (PHBA) known as parabens (Pbens) are widely used as preservatives in food, pharmaceuticals, and cosmetics. Several in vivo and in vitro studies have shown these compounds to be estrogenic. Here, for the first time
F Vela-Soria et al.
Journal of chromatography. A, 1371, 39-47 (2014-12-03)
In recent decades, the industrial development has resulted in the appearance of a large amount of new chemicals that are able to produce disorders in the human endocrine system. These substances, so-called endocrine disrupting chemicals (EDCs), include many families of
H Ishiwata et al.
Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan, 42(6), 404-412 (2002-03-06)
The mean concentration and daily intake of five preservatives were estimated based on the results of an analysis of 89,927 samples of food obtained in official inspections by Japanese local governments in fiscal year 1998. The mean concentration of benzoic
Li-Na Fu et al.
Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials, 33(12), 1871-1874 (2011-05-10)
To study the chemical constituents of Rhizoma Imperatae and their anti-complementary activity. By the hemolysis test, the petroleum extraction, ethyl acetate extraction, n-butanol extraction and the water extraction was tested for anti-complementary activity. Compounds were isolated and purified by silica
Yue-ying Song et al.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 29(4), 323-325 (2005-02-15)
Quantitative determination was made of ethyl-p-hydroxybenzoate in Dracaena cochinchinensis extracted with two technologies. The sample was resolved with methanol and isolated by TLC, purged with methanol. Tge sample solution was chroma to graphed on a C18 column with acetonitrile-1% acetic
Lei Wang et al.
Environment international, 59, 27-32 (2013-06-12)
Human exposure to p-hydroxybenzoic acid esters (parabens) is a concern, owing to adverse health effects of these compounds. Parabens are metabolized and eliminated from the human bodies within a few hours of exposure. In this study, for the first time
Szabolcs Fekete et al.
Journal of chromatography. A, 1359, 124-130 (2014-07-30)
In this study, the retention changes induced by frictional heating were evaluated for model small compounds (150-190Da) and a small protein, namely insulin (5.7kDa). For this purpose, the effect of longitudinal temperature gradient caused by frictional heating was experimentally dissociated
Johan Unga et al.
European journal of pharmaceutics and biopharmaceutics : official journal of Arbeitsgemeinschaft fur Pharmazeutische Verfahrenstechnik e.V, 73(2), 260-268 (2009-06-11)
The solid state behaviour of polyethylene glycol 4000 (PEG 4000) and dispersions of a homologous series of parabens (methyl- (MP), ethyl- (EP), propyl- (PP) and butyl- (BP)) were examined and compared to the paraben solubility in liquid PEG 400. Dispersions
Suzanne Abbas et al.
Drug metabolism and pharmacokinetics, 25(6), 568-577 (2010-10-12)
Parabens (alkyl esters of 4-hydroxybenzoic acid) are widely used as preservatives in drugs, cosmetic products, and foodstuffs. Safety concerns have recently increased due to the potential health risks associated to exposure to large amounts of these substances. Biotransformation of parabens
Antonia M Calafat et al.
Environmental health perspectives, 118(5), 679-685 (2010-01-09)
Parabens are widely used as antimicrobial preservatives in cosmetics, -pharmaceuticals, and food and beverage processing. We assessed exposure to methyl, ethyl, propyl, and butyl parabens in a representative sample of persons >or= 6 years of age in the U.S. general
Elisabetta Esposito et al.
Journal of cosmetic science, 54(3), 239-250 (2003-07-15)
A study of the diffusion of parabens from topical formulations is presented here. In particular, four different topical formulations, namely, a water-in-oil emulsion, an oil-in-water emulsion, and two hydrophilic gels (Pemulen gel and Carbopol gel) were produced, containing a mixture
S Y Oh et al.
International journal of pharmaceutics, 236(1-2), 35-42 (2002-03-14)
The effects of ethanol on the simultaneous transport and metabolism of methyl p-hydroxybenzoate (HBM) were investigated in the skin of Yucatan micropig in vitro. It was found that transesterification occurred in the permeation studies involving ethanol. This was confirmed by
Christopher Jewell et al.
Toxicology and applied pharmacology, 225(2), 221-228 (2007-09-25)
Parabens are esters of 4-hydroxybenzoic acid and used as anti-microbial agents in a wide variety of toiletries, cosmetics and pharmaceuticals. It is of interest to understand the dermal absorption and hydrolysis of parabens, and to evaluate their disposition after dermal
Yushi Feng et al.
Journal of pharmaceutical sciences, 96(12), 3324-3333 (2007-06-02)
Certain crystallographic features, such as the existence of slip planes, can greatly facilitate the ability of crystals to deform plastically. An investigation of the relationship between the slip planes and the tableting performance of the crystals of methyl, ethyl, n-propyl
Nikhil M Vad et al.
Journal of pharmaceutical sciences, 97(5), 1934-1945 (2007-09-12)
The metabolism and toxicity of ethyl 4-hydroxybenzoate (4-HEB) were investigated in vitro using tyrosinase enzyme, a melanoma molecular target, and CYP2E1 induced rat liver microsomes, and in human SK-MEL-28 melanoma cells. The results were compared to 4-hydroxyanisole (4-HA). At 90
Shinshi Oishi
Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 42(11), 1845-1849 (2004-09-08)
Parabens are alkyl esters of p-hydroxybenzoic acid widely used as preservatives in foodstuffs, cosmetics toiletries and pharmaceuticals. These compounds are known to exert a weak estrogenic activity in estrogen receptor assays in vitro. In addition butyl and propyl parabens show
Camilla Taxvig et al.
Toxicological sciences : an official journal of the Society of Toxicology, 106(1), 206-213 (2008-07-24)
The effects of ethyl and butyl paraben on steroidogenesis were evaluated in rats exposed in utero. Pregnant Wistar rats were dosed from gestational day (GD) 7 to GD 21, followed by examination of the dams, and the fetuses. Additionally, both
Pankaj Aggarwal et al.
Journal of chromatography. A, 1364, 96-106 (2014-09-07)
Highly cross-linked monolithic networks (i.e., polyethylene glycol diacrylate, PEGDA) synthesized from monomers containing varying ethylene oxide chain lengths were fabricated inside fused silica capillary columns for use in liquid chromatography (LC) of small molecules. Tergitol was used as a surfactant
M A Farajzadeh et al.
Talanta, 81(4-5), 1360-1367 (2010-05-06)
In this study a new dispersive liquid-liquid microextraction (DLLME) method is presented on the basis of a safe organic solvent, octanol, which is lighter than water. The proposed method is used for the extraction and pre-concentration of some preservatives including
Sawsan El Hussein et al.
Experimental dermatology, 16(10), 830-836 (2007-09-12)
Concern is continuously raised about the safety of parabens which are present in most of the cosmetic preparations. In this investigation, methyl-, ethyl-, propyl- and butyl paraben (MP, EP, PP, BP), in a commercial cosmetic lotion, were deposited on human
Ke Yu et al.
Analytica chimica acta, 738, 59-68 (2012-07-14)
Ultrahigh performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) was utilized to develop a rapid, sensitive and reliable method without solid phase extraction (SPE) pre-concentration for trace analysis of 11 pharmaceuticals and personal care products (PPCPs) in influent and effluent from municipal
Zheng Cai et al.
AAPS PharmSciTech, 12(4), 1102-1109 (2011-09-01)
Gastrodin is the major bioactive constituent of the traditional Chinese drug "Tianma." It is used in the treatment of some nervous system diseases and can be transported to the brain via intranasal administration. In the current paper, the development of
Rita Celano et al.
Journal of chromatography. A, 1355, 26-35 (2014-06-19)
Pharmaceutical and personal care products (PPCPs) are one of the most important classes of emerging contaminants. The potential of ecological and environmental impacts associated with PPCPs are of particular concern because they continually penetrate the aquatic environment. This work describes
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