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Showing 1-30 of 43 results for "79267" within Papers
Yasser El-Nahhal et al.
Journal of agricultural and food chemistry, 53(5), 1620-1624 (2005-03-03)
This study aimed to evaluate new methodology for designing ecologically acceptable formulations of acetochlor. Modification of montmorillonite with phenyltrimethylammonium chloride (PTMA) or benzyltrimethylammonium chloride (BTMA) and organoclay formulations of acetochlor were prepared in the presence of high concentrations of sodium
Fazel Abdolahpur Monikh et al.
Nature communications, 12(1), 899-899 (2021-02-11)
Analytical limitations considerably hinder our understanding of the impacts of the physicochemical properties of nanomaterials (NMs) on their biological fate in organisms. Here, using a fit-for-purpose analytical workflow, including dosing and emerging analytical techniques, NMs present in organisms are characterized
A N Generalova et al.
Nanoscale, 7(5), 1709-1717 (2014-12-17)
We report a new surface modification approach of upconversion nanoparticles (UCNPs) structured as inorganic hosts NaYF4 codoped with Yb(3+) and Er(3+) based on their encapsulation in a two-stage process of precipitation polymerization of acrolein under alkaline conditions in the presence
Estefanía Noriega-Fernández et al.
Foods (Basel, Switzerland), 10(3) (2021-04-04)
The aim of this work was to evaluate the potential of ultrasound (US), alone or in combination with mild heating and/or EDTA towards reduction of As, Cd, I, and Hg content of Laminaria hyperborea. Concentrations of As, Cd, I, and
Miriam Küpper et al.
Analytical and bioanalytical chemistry, 407(21), 6435-6445 (2015-06-17)
The size, morphology, and chemical composition of particles deposited in the lungs of two nickel refinery workers were studied by scanning and transmission electron microscopy. The particles were extracted from the lung tissue by low-temperature ashing or by dissolution in
Vincenzo Rispoli et al.
Neuroscience letters, 356(3), 199-202 (2004-03-24)
The effects of two choline pivaloyl esters, [2-(2,2-dimethylpropionyloxy)ethyl]trimethylammonium iodide (1) and [2-(2,2-dimethylpropionyloxy)ethyl]trimethylammonium 2,2-dimethylpropionate (2), on learning and memory impairments induced in rats by scopolamine or lesions of nucleus basalis magnocellularis (NBM) have been evaluated by object recognition and Morris water
Mohammadali Azadfar et al.
International journal of biological macromolecules, 75, 58-66 (2015-01-21)
The structure of lignin obtained from the ozone and soaking aqueous ammonia pretreatment of wheat straw has been characterized utilizing chemical analytical methods in order to reveal its antioxidant characteristics, including attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), pyrolysis-gas chromatography/mass
Jian Li et al.
Nanomedicine : nanotechnology, biology, and medicine, 10(7), 1465-1475 (2014-02-04)
Carbon nanotubes (CNTs) are promising drug delivery systems due to their external functionalizable surface and their hollowed cavity that can encapsulate several bioactive molecules. In this study, the chemotherapeutic drug cisplatin or an inert platinum(IV) complex were entrapped inside functionalized-multi-walled-CNTs
Seungjoon Chung et al.
International journal of environmental research and public health, 17(12) (2020-06-25)
This study describes an immobilization method of enriched microorganism, for robustly degrading organic compounds, including tetramethyl ammonium hydroxide (TMAH) in electronics wastewater without an increase of total organic carbon (TOC) in effluent. The enriched TMAH degrading bacteria was entrapped inside
A N Salt et al.
Hearing research, 154(1-2), 88-97 (2001-06-26)
The administration of drugs to the inner ear via the round window membrane is becoming more widely used for both clinical and experimental purposes. The actual drug levels achieved in different regions of the inner ear by this method have
Cláudia Margalho et al.
Journal of analytical toxicology, 29(5), 309-313 (2005-08-18)
A simple and rapid method was validated to determine furosemide in whole blood. The experimental work was performed so that all validation parameters are considered simultaneously in a one-day assay protocol. A solid-phase extraction procedure using BondElut-LRC Certify columns was
V Novohradský et al.
Dalton transactions (Cambridge, England : 2003), 44(4), 1905-1913 (2014-12-10)
NAMI-A is a ruthenium-based drug endowed with the unique property of selectively targeting solid tumour metastases. Although two clinical studies had already been completed, limited information exists on the behavior of NAMI-A after injection into the bloodstream. PK data in
Kelly Peeters et al.
Environmental research, 142, 511-521 (2015-08-19)
Biotic and abiotic degradation of toxic organotin compounds (OTCs) in landfill leachates is usually not complete. In this work adsorption and degradation processes of tributyltin (TBT) and trimethyltin (TMeT) in leachate sample treated with different iron nanoparticles (FeNPs): Fe(0) (nZVI)
Jeanne Sirovatka Dorweiler et al.
Biochemistry, 42(49), 14653-14662 (2003-12-10)
Cobalamin-dependent methionine synthase (MetH) catalyzes the transfer of methyl groups between methyltetrahydrofolate (CH(3)-H(4)folate) and homocysteine, with the enzyme-bound cobalamin serving as an intermediary in the methyl transfers. An MetH fragment comprising residues 2-649 contains modules that bind and activate CH(3)-H(4)folate
Timothy J Jensen et al.
Journal of photochemistry and photobiology. B, Biology, 100(2), 100-111 (2010-06-19)
Five cationic porphyrins bearing one to four -N(CH(3))(3)(+) groups linked to the p-phenyl positions of 5,10,15,20-tetraphenylporphyrin (TPP) were synthesized in order to study the effect of overall charge and its distribution on the cellular uptake, phototoxicity and intracellular localization using
Marek Majdan et al.
Journal of environmental management, 91(1), 195-205 (2009-09-01)
The comparison of phenol sorption on phenyltrimethylammonium (PTMA)- and benzyltrimethylammonium (BTMA)-bentonite shows a clear difference as far as phenol sorption isotherms are concerned. For PTMA-bentonite the sorption isotherm is of a straight-line character which results from simple partitioning of phenol
A Ranz et al.
Journal of biochemical and biophysical methods, 69(1-2), 3-14 (2006-03-28)
In the present study, a derivatization method for the determination of acidic herbicides has been investigated. This procedure involves the methylation with the quaternary ammonium salt trimethylanilinium hydroxide (TMAH) directly in the gas chromatographic auto-sampler vial for analysis by gas
Robert Mynatt et al.
Journal of the Association for Research in Otolaryngology : JARO, 7(2), 182-193 (2006-05-24)
Local applications of drugs to the inner ear are increasingly being used to treat patients' inner ear disorders. Knowledge of the pharmacokinetics of drugs in the inner ear fluids is essential for a scientific basis for such treatments. When auditory
Alec N Salt
Advances in oto-rhino-laryngology, 59, 140-148 (2002-03-12)
The inner ear fluids are remarkably 'unstirred' so that it cannot be assumed that applied drugs are dispersed throughout the fluid spaces. Calculation of the effective concentrations achieved when drugs are applied directly to the inner ear is made possible
Anthony A Mikulec et al.
Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology, 29(7), 1020-1026 (2008-09-02)
Intratympanic drug delivery has become widely used in the clinic, but little is known regarding how clinically used drug preparations affect round window membrane (RWM) permeability or how much drug is actually delivered to the cochlea. This study evaluated the
Metin Ekinci et al.
Current eye research, 39(8), 853-858 (2014-02-08)
To evaluate the toxic effects of chronic lead (Pb) exposure on retinal nerve fiber layer thickness (RNFLT), macular thickness (MT) and choroidal thickness (CT) in battery industry workers. Male factory workers (n = 50) and healthy non-employees (n = 20) participated in the study.
M Lorenzetti et al.
Biomedical materials (Bristol, England), 10(4), 045012-045012 (2015-08-01)
This study reports on the selective adsorption of whole plasma proteins on hydrothermally (HT) grown TiO2-anatase coatings and its dependence on the three main surface properties: surface charge, wettability and roughness. The influence of the photo-activation of TiO2 by UV
Ngoc A Dang et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 986-987, 115-122 (2015-03-03)
Recently, thermally-assisted hydrolysis and methylation followed by gas chromatography-mass spectrometry (THM-GC-MS) in combination with chemometrics has been used to develop a 20-compound model for fast differentiation of Mycobacterium tuberculosis (MTB) from Non-tuberculous mycobacteria (NTM) in bacterial cultures. This model provided
Jiannan Sun et al.
Journal of chromatography. A, 1379, 112-117 (2015-01-13)
This study achieved resolution improvement for iodine speciation in the presence of an ion-pairing reagent by a pressure-driven capillary electrophoresis (CE) system. Addition of 0.01mM tetrabutyl ammonium hydroxide (TBAH) as the ion-pairing reagent into the electrophoretic buffer resulted in the
Petr Gebauer et al.
Electrophoresis, 29(5), 1067-1076 (2008-01-26)
In electrophoresis, the introduction of a sample into the BGE creates two new zone boundaries, the front and rear boundary of the sample zone which is sandwiched between the BGE. During an electrophoresis run, these boundaries move and split into
Y El-Nahhal et al.
Journal of agricultural and food chemistry, 48(10), 4791-4801 (2000-10-29)
This study aimed to design formulations of hydrophobic herbicides, alachlor and metolachlor, by adsorbing them on the clay mineral montmorillonite preadsorbed by the small organic cation phenyltrimethylammonium (PTMA). An adsorption model that considers electrostatics and specific binding and the possibility
Alec N Salt et al.
Hearing research, 182(1-2), 24-33 (2003-09-02)
Our understanding of the perilymph kinetics of drugs depends largely on data obtained by the analysis of perilymph samples. Although a number of studies have demonstrated qualitatively that perilymph samples may be contaminated by cerebrospinal fluid (CSF), and some investigations
R W Gullick et al.
Environmental science & technology, 35(7), 1523-1530 (2001-05-12)
A natural shale and four synthetic organoclays were compared as potential sorbent additives to containment barriers at hazardous waste sites. Trimethylphenyl ammonium bentonite (TMPA-bent) was shown in batch experiments to have the greatest sorption capacities for 1,2,4-trichlorobenzene, trichloroethylene, and methyl
D Monnaie et al.
Biochemistry, 39(18), 5349-5354 (2000-05-23)
In the process of characterizing the Na(+)-binding properties of factor Xa, a specific inhibition of this enzyme by quaternary amines was identified, consistent with previous observations. The binding occurs with K(i) in the low millimolar range, with trimethylphenylammonium (TMPA) showing
Tomohiro Narukawa et al.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 31(6), 521-527 (2015-06-13)
New measurement conditions for arsenic speciation analysis of rice flour were developed using HPLC-ICP-MS equipped with a reversed phase ODS column. Eight arsenic species, namely, arsenite [As(III)], arsenate [As(V)], monomethylarsonic acid (MMAA), dimethylarsinic acid (DMAA), trimethylarsine oxide (TMAO), tetramethylarsonium (TeMA)
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