79267

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Reduced downward mobility of metolachlor and metribuzin from surfactant-modified clays.

Neera Singh

Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes, 41(1), 17-29 (2006-01-06)

The study aims to prepare the organoclay complexes of metolachlor and metribuzin so as to reduce their downward mobility in soil profile. The organoclays were preadsorbed with phenyltrimethylammonium (PTMA) (50% of cation exchange capacity [CEC]) and hexadecyltrimethylammonium (HDTMA) (100% of

Application of dynamic liquid-phase microextraction and injection port derivatization combined with gas chromatography-mass spectrometry to the determination of acidic pharmaceutically active compounds in water samples.

Jie Zhang et al.

Journal of chromatography. A, 1216(44), 7527-7532 (2009-04-07)

A method has been established for the determination of four pharmaceutically active compounds (ibuprofen, ketoprofen, naproxen and clofibric acid) in water samples using dynamic hollow fiber liquid-phase microextraction (HF/LPME) followed by gas chromatography (GC) injection port derivatization and GC-mass spectrometric

Response of wheat and pea seedlings on increase of bromine concentration in the growth medium.

Irina Shtangeeva et al.

Environmental science and pollution research international, 22(23), 19060-19068 (2015-08-04)

Biogeochemical cycles of bromine (Br) and its quantitative requirements for different plant species are still studied poorly. There is a need to examine Br pathways in plants and evaluate the factors important for Br accumulation in a plant. In the

Solute-inhibitor interactions in the plasmodial surface anion channel reveal complexities in the transport process.

Godfrey Lisk et al.

Molecular pharmacology, 71(5), 1241-1250 (2007-02-09)

Human red blood cells infected with the malaria parasite Plasmodium falciparum have markedly increased permeabilities to diverse organic and inorganic solutes. The plasmodial surface anion channel (PSAC), recently identified with electrophysiological methods, contributes to the uptake of many small solutes.

Marker entry into vestibular perilymph via the stapes following applications to the round window niche of guinea pigs.

Alec N Salt et al.

Hearing research, 283(1-2), 14-23 (2011-12-20)

It has been widely believed that drug entry from the middle ear into perilymph occurs primarily via the round window (RW) membrane. Entry into scala vestibuli (SV) was thought to be dominated by local, inter-scala communication between scala tympani (ST)

Perilymph pharmacokinetics of markers and dexamethasone applied and sampled at the lateral semi-circular canal.

Alec N Salt et al.

Journal of the Association for Research in Otolaryngology : JARO, 13(6), 771-783 (2012-09-13)

Perilymph pharmacokinetics was investigated by a novel approach, in which solutions containing drug or marker were injected from a pipette sealed into the perilymphatic space of the lateral semi-circular canal (LSCC). The cochlear aqueduct provides the outlet for fluid flow

Molecular basis of inhibition of substrate hydrolysis by a ligand bound to the peripheral site of acetylcholinesterase.

Jeffrey T Auletta et al.

Chemico-biological interactions, 187(1-3), 135-141 (2010-05-25)

Acetylcholinesterase (AChE) contains a narrow and deep active site gorge with two sites of ligand binding, an acylation site (or A-site) at the base of the gorge and a peripheral site (or P-site) near the gorge entrance. The P-site contributes

Marker retention in the cochlea following injections through the round window membrane.

Alec N Salt et al.

Hearing research, 232(1-2), 78-86 (2007-07-31)

Local delivery of drugs to the inner ear is increasingly being used in both clinical and experimental studies. Although direct injection of drugs into perilymph appears to be the most promising way of administering drugs quantitatively, no studies have yet

Development of sample clean up methods for the analysis of Mycobacterium tuberculosis methyl mycocerosate biomarkers in sputum extracts by gas chromatography-mass spectrometry.

Simona C Nicoara et al.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 986-987, 135-142 (2015-03-03)

A proof of principle gas chromatography-mass spectrometry method is presented, in combination with clean up assays, aiming to improve the analysis of methyl mycocerosate tuberculosis biomarkers from sputum. Methyl mycocerosates are generated from the transesterification of phthiocerol dimycocerosates (PDIMs), extracted

Control and Study of the Stoichiometry in Evaporated Perovskite Solar Cells.

Joël Teuscher et al.

ChemSusChem, 8(22), 3847-3852 (2015-10-17)

Herein, we present the precise stoichiometric control of methlyammonium lead iodide perovskite thin-films using high vacuum dual-source vapor-phase deposition. We found that UV/Vis absorption and emission spectra were inadequate for assessing precisely the perovskite composition. Alternatively, inductively coupled plasma mass

Entry of substances into perilymph through the bone of the otic capsule after intratympanic applications in guinea pigs: implications for local drug delivery in humans.

Anthony A Mikulec et al.

Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology, 30(2), 131-138 (2009-01-31)

Drugs applied to the middle ear enter perilymph through the bony otic capsule. Drugs applied intratympanically in humans are thought to enter the cochlea primarily through the round window membrane (RWM). Local drug treatments of the ear are commonly evaluated

Thermally assisted methylation and subsequent silylation of scheduled acids of chemical weapon convention for on-site analysis and its comparison with the other methods of methylation.

Kanchanavadee Amphaisri et al.

Journal of chromatography. A, 1218(7), 972-980 (2011-01-11)

On-site verification of the chemical weapon convention (CWC) requires provision for the detection and identification of alkyl phosphonic acids as well as some organic acids that are amenable to GC-MS only after derivatisation. Various derivatisation methods have been used for

Enhanced osteogenesis on titanium implants by UVB photofunctionalization of hydrothermally grown TiO₂ coatings.

Martina Lorenzetti et al.

Journal of biomaterials applications, 30(1), 71-84 (2015-01-31)

Even though Ti-based implants are the most used materials for hard tissue replacement, they may present lack of osseointegration on the long term, due to their inertness. Hydrothermal treatment (HT) is a useful technique for the synthesis of firmly attached

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