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33211

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Nrupa Borkar et al.
European journal of pharmaceutics and biopharmaceutics : official journal of Arbeitsgemeinschaft fur Pharmazeutische Verfahrenstechnik e.V, 89, 216-223 (2014-12-17)
Apomorphine, a subcutaneously administered drug for Parkinson's disease with short half-life requires frequent administration leading to patient non-compliance. This study aimed at synthesising and purifying lipophilic diesters of apomorphine, and investigating their in vitro degradation in biorelevant media before and
John Suberu et al.
Journal of pharmaceutical and biomedical analysis, 117, 522-531 (2015-10-18)
An improved liquid chromatography-tandem mass spectrometry (LC-MS/MS) protocol for rapid analysis of co-metabolites of A. annua in raw extracts was developed and extensively characterized. The new method was used to analyse metabolic profiles of 13 varieties of A. annua from
Benito F García et al.
Molecules (Basel, Switzerland), 20(11), 20079-20106 (2015-11-13)
The citrus by-products released from citrus processing plants may contain high levels of potentially bioactive compounds such as flavonoids, which are a widely distributed group of polyphenolic compounds with health-related properties based on their antioxidant activity. In the study reported
S Goldberg et al.
Journal of dental research, 73(6), 1168-1172 (1994-06-01)
Whereas previous studies have shown correlations between volatile sulphur compounds (VSC) and bad breath levels, it is probable that other compounds found in the oral cavity may contribute to oral malodor. In the present investigation, the possibility that diamines (cadaverine
Thi Van Anh Ha et al.
Food chemistry, 178, 115-121 (2015-02-24)
Lycopene nanoemulsions were prepared to protect the antioxidant activity and improve the bioaccessibility of lycopene-enriched tomato extract (containing 6% of lycopene) by an emulsification-evaporation method. Lycopene nanoemulsions, with droplet sizes between 100 and 200 nm, exhibited higher anti-radical efficiency and
Nicolas Chevalier et al.
Human reproduction (Oxford, England), 30(2), 447-453 (2014-12-21)
Does a relationship exist between insulin-like peptide 3 (INSL3) and selected environmental endocrine disruptors (EEDs) in human cord blood (cb)? In the whole population (cryptorchid and control boys) cbINSL3 correlated negatively with cb free bisphenol A (BPA) providing indirect evidence
Andrew J Washkowitz et al.
Development (Cambridge, England), 142(1), 31-40 (2014-12-18)
The maintenance and control of pluripotency is of great interest in stem cell biology. The dual specificity T-box/basic-helix-loop-helix-zipper transcription factor Mga is expressed in the pluripotent cells of the inner cell mass (ICM) and epiblast of the peri-implantation mouse embryo
S Umair et al.
Experimental parasitology, 131(1), 101-106 (2012-03-31)
Catabolism of lysine through the pipecolate, saccharopine and cadaverine pathways has been investigated in L3 and adult Haemonchus contortus and Teladorsagia circumcincta. Both enzymes of the saccharopine pathway (lysine ketoglutarate reductase (LKR) and saccharopine dehydrogenase (SDH)) were active in L3
Rune Gangsøy Kristiansen et al.
American journal of physiology. Gastrointestinal and liver physiology, 307(10), G1024-G1031 (2014-09-27)
Glycine is an important ammoniagenic amino acid, which is increased in acute liver failure (ALF). We have previously shown that L-ornithine phenylacetate (OP) attenuates ammonia rise and intracranial pressure in pigs suffering from ALF but failed to demonstrate a stoichiometric
Bilal Yilmaz et al.
Journal of AOAC International, 97(4), 1061-1066 (2014-08-26)
This paper describes a GCIMS method for the determination of flurbiprofen in human plasma. Flurbiprofen and internal standard ibuprofen were extracted from plasma by using a liquid-liquid extraction method. Derivatization was carried out using N-Methyl-N-(trimethylsilyl)trifluoroacetamide. The calibration curve was linear
Clara H Jeong et al.
Environmental science & technology, 49(23), 13749-13759 (2015-05-06)
The introduction of drinking water disinfection greatly reduced waterborne diseases. However, the reaction between disinfectants and natural organic matter in the source water leads to an unintended consequence, the formation of drinking water disinfection byproducts (DBPs). The haloacetaldehydes (HALs) are
Q Q He et al.
Organic & biomolecular chemistry, 13(13), 4070-4079 (2015-03-05)
This study investigated the unexpected decomposition and associated intermediates of compound 1, a specific member of a drug discovery library based on a monosaccharide scaffold. LC/MS and NMR spectroscopic analyses indicated that, under acidic conditions, 1 can be converted into
Zareen S Khan et al.
Journal of chromatography. A, 1418, 228-232 (2015-10-04)
Public exposure to pesticide residues through the main/side-stream smoke of tobacco (Nicotiana tabacum L.) is an international concern. This article reports optimization and validation of large-scale multiresidue analysis methods involving low pressure and traditional gas chromatography tandem mass spectrometry in
Matthäus Mlynek et al.
Journal of chromatography. A, 1284, 112-117 (2013-03-08)
The behaviour of PMMA standards in mixtures composed of two binary critical eluents was investigated. It was found that combinations of two critical eluents do not result in a molar mass independent elution (critical conditions). When mixing two binary critical
Hannelore Rücker et al.
Organic & biomolecular chemistry, 13(10), 3040-3047 (2015-01-27)
Inflammatory signaling pathways orchestrate the cellular response to infection and injury. These pathways are known to be modulated by compounds that alkylate cysteinyl thiols. One class of phytochemicals with strong thiol alkylating activity is the chalcones. In this study we
Gustavo D Mendes et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 969, 19-28 (2014-08-26)
A rapid, sensitive and specific method for quantifying propylthiouracil in human plasma using methylthiouracil as the internal standard (IS) is described. The analyte and the IS were extracted from plasma by liquid-liquid extraction using an organic solvent (ethyl acetate). The
Ludwig Hoellein et al.
Journal of pharmaceutical and biomedical analysis, 98, 434-445 (2014-07-13)
Regular quality control and post-marketing surveillance of pharmaceuticals has been a critical challenge for countries of the developing world ever since. Counterfeit and substandard medicines are widely distributed and the real extent of their prevalence still remains unknown. Compendial protocols
Nađa Kostić et al.
Journal of pharmaceutical and biomedical analysis, 109, 79-84 (2015-03-15)
In this paper, novel LC-MS/MS methods for the determination of antiepileptic drug pregabalin in dried matrix spots (DMS) are presented. This attractive technique of sample collection in micro amount was utilized in the form of dried blood spots (DBS) and
Eunice Molinar-Toribio et al.
PloS one, 9(8), e104637-e104637 (2014-08-15)
SHROB rats have been suggested as a model for metabolic syndrome (MetS) as a situation prior to the onset of CVD or type-2 diabetes, but information on descriptive biochemical parameters for this model is limited. Here, we extensively evaluate parameters
K M Sharif et al.
Biomedical chromatography : BMC, 29(12), 1826-1833 (2015-06-03)
Multivariate analysis of thin-layer chromatography (TLC) images was modeled to predict antioxidant activity of Pereskia bleo leaves and to identify the contributing compounds of the activity. TLC was developed in optimized mobile phase using the 'PRISMA' optimization method and the
Man-Jeong Paik et al.
Sleep & breathing = Schlaf & Atmung, 18(3), 517-523 (2014-01-10)
The apnea-hypopnea index (AHI) is closely related with the severity of daytime sleepiness, but excessive daytime sleepiness (EDS) is not presented on all patients with obstructive sleep apnea (OSA). It is unclear why daytime sleepiness is not always present in
Laishram Shantikumar Singh et al.
BMC microbiology, 14, 278-278 (2014-11-20)
Actinomycetes have provided a wealth of bioactive secondary metabolites with interesting activities such as antimicrobial, antiviral and anticancer. The study aims at isolation, characterization and the antimicrobial potentiality of Streptomyces sannanensis SU118 obtained from Phoomdi, a unique habitat of Loktak
Somnuk Bunsupa et al.
The Plant cell, 24(3), 1202-1216 (2012-03-15)
Lysine decarboxylase (LDC) catalyzes the first-step in the biosynthetic pathway of quinolizidine alkaloids (QAs), which form a distinct, large family of plant alkaloids. A cDNA of lysine/ornithine decarboxylase (L/ODC) was isolated by differential transcript screening in QA-producing and nonproducing cultivars
Stuart J Khan et al.
Chirality, 26(11), 739-746 (2014-12-17)
Ibuprofen and naproxen are commonly used members of a class of pharmaceuticals known as 2-arylpropionic acids (2-APAs). Both are chiral chemicals and can exist as either of two (R)- and (S)-enantiomers. Enantioselective analyses of effluents from municipal wastewater treatment plants
Cristiane dos Santos Giuberti et al.
Journal of liposome research, 23(3), 220-227 (2013-05-11)
Recent studies using long-circulating and pH-sensitive liposomes containing cisplatin (SpHL-CDDP) have resulted in a formulation with improved pharmacokinetic, toxicity and tumor localization properties. In this study, SpHL-CDDP were prepared in both laboratory and pilot scales. This study evaluated the possibility
Susana Grimalt et al.
Analytical and bioanalytical chemistry, 407(11), 3083-3091 (2015-01-30)
The feasibility of the production of a reference material for pesticide residue analysis in a cucumber matrix was investigated. Cucumber was spiked at 0.075 mg/kg with each of the 15 selected pesticides (acetamiprid, azoxystrobin, carbendazim, chlorpyrifos, cypermethrin, diazinon, (α + β)-endosulfan, fenitrothion, imazalil
Christy Echakachi Manyi-Loh et al.
Pakistan journal of pharmaceutical sciences, 26(5), 897-906 (2013-09-17)
The growing problem of antibiotic resistance by Helicobacter pylori demands the search for novel compounds, especially from natural sources. We evaluated the anti-H. pylori activity of six local honeys at different concentrations as well as their solvent extracts by the
Maarit Neuvonen et al.
PloS one, 9(8), e103743-e103743 (2014-08-27)
Bacterial cholesterol oxidase is commonly used as an experimental tool to reduce cellular cholesterol content. That the treatment also generates the poorly degradable metabolite 4-cholesten-3-one (cholestenone) has received less attention. Here, we investigated the membrane partitioning of cholestenone using simulations
Kenji Takahashi et al.
Applied and environmental microbiology, 81(23), 8022-8036 (2015-09-13)
Sphingobium sp. strain SYK-6 is able to degrade various lignin-derived biaryls, including a phenylcoumaran-type compound, dehydrodiconiferyl alcohol (DCA). In SYK-6 cells, the alcohol group of the B-ring side chain of DCA is initially oxidized to the carboxyl group to generate
Dae J Park et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 962, 147-152 (2014-06-14)
New tandem mass spectrometric method coupled with liquid chromatography (LC-MS/MS) has been developed to determine the total concentration of camptothecin derivatives (irinotecan and SN-38) regardless of inter-conversion phenomenon between carboxylate and lactone forms. At first, all sample solutions were acidified
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