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Methyl chloride

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https://www.readbyqxmd.com/read/28532077/preparation-of-robust-braid-reinforced-poly-vinyl-chloride-ultrafiltration-hollow-fiber-membrane-with-antifouling-surface-and-application-to-filtration-of-activated-sludge-solution
#1
Zhuang Zhou, Saeid Rajabzadeh, Lifeng Fang, Taro Miyoshi, Yuriko Kakihana, Hideto Matsuyama
Braid-reinforced hollow fiber membranes with high mechanical properties and considerable antifouling surface were prepared by blending poly(vinyl chloride) (PVC) with poly(vinyl chloride-co-poly(ethylene glycol) methyl ether methacrylate) (poly(VC-co-PEGMA)) copolymer via non-solvent induced phase separation (NIPS). The tensile strength of the braid-reinforced PVC hollow fiber membranes were significantly larger than those of previously reported various types of PVC hollow fiber membranes. The high interfacial bonding strength indicated the good compatibility between the coating materials and the surface of polyethylene terephthalate (PET)-braid...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28529787/crystal-structure-of-2-chloro-1-3-bis-2-6-diiso-propyl-phen-yl-1-3-2-di-aza-phospho-lidine-2-oxide
#2
Alex J Veinot, Arthur D Hendsbee, Jason D Masuda
The title compound, C26H38ClN2OP, was synthesized by reacting phosphoryl chloride with N,N'-bis-(2,6-diiso-propyl-phen-yl)ethane-1,2-di-amine in the presence of N-methyl-morpholine which acted as an auxilliary base to quench the HCl released as a by-product. The resultant N-heterocyclic phosphine five-membered ring adopts a half-chair conformation and features a tetra-coordinate P atom ligated by the chelating di-amine [P-N = 1.6348 (14) and 1.6192 (14) Å], one double-bonded O atom [P1-O1 = 1.4652 (12) Å] and one Cl atom [P1-Cl1 = 2...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529784/%C3%AE-3-chlorido-%C3%AE-2-chlorido-%C3%AE-3-pyrrolidine-1-carbo-dithio-ato-%C3%AE%C2%BA-4-s-s-s-s-tris-tri-ethyl-phosphane-%C3%AE%C2%BAp-copper-i-crystal-structure-and-hirshfeld-surface-analysis
#3
Yi Jiun Tan, Chien Ing Yeo, Nathan R Halcovitch, Mukesh M Jotani, Edward R T Tiekink
The title trinuclear compound, [Cu3(C5H8NS2)Cl2(C6H15P)3], has the di-thio-carbamate ligand symmetrically chelating one Cu(I) atom and each of the S atoms bridging to another Cu(I) atom. Both chloride ligands are bridging, one being μ3- and the other μ2-bridging. Each Et3P ligand occupies a terminal position. Two of the Cu(I) atoms exist within Cl2PS donor sets and the third is based on a ClPS2 donor set, with each coordination geometry based on a distorted tetra-hedron. The constituents defining the core of the mol-ecule, i...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28527332/determination-of-parabens-in-human-urine-by-optimal-ultrasound-assisted-emulsification-microextraction-and-on-line-acetylation-gas-chromatography-mass-spectrometry
#4
Zhou Hui-Ting, Erica M C Ding, Wang-Hsien Ding
An effective and solvent-less method for the rapid determination of four commonly detected parabens (methyl-, ethyl-, propyl- and butyl-) in human urine samples is described. This method employed ultrasound-assisted emulsification microextraction (USAEME) before identification and quantitation of the parabens via on-line acetylation gas chromatography-mass spectrometry (GC-MS). Urine samples were enzymatically de-conjugated with β-glucuronidase and then extracted by an optimal USAEME procedure for the measurement of total concentrations of target analytes...
May 10, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28497383/form-of-dietary-methylmercury-does-not-affect-total-mercury-accumulation-in-the-tissues-of-zebra-finch
#5
Claire W Varian-Ramos, Margaret Whitney, Gary W Rice, Daniel A Cristol
Exposure to mercury in humans, other mammals, and birds is primarily dietary, with mercury in the methylated form and bound to cysteine in the tissues of prey items. Yet dosing studies are generally carried out using methylmercury chloride. Here we tested whether the accumulation of total mercury in zebra finch blood, egg, muscle, liver, kidney or brain differed depending on whether dietary mercury was complexed with chloride or cysteine. We found no effect of form of mercury on tissue accumulation. Some previous studies have found lower accumulation of mercury in tissues of animals fed complexed mercury...
May 11, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28493701/substituted-2-acylamino-cycloalkylthiophene-3-carboxylic-acid-arylamides-as-inhibitors-of-the-calcium-activated-chloride-channel-transmembrane-protein-16a-tmem16a
#6
Eric C Truong, Puay-Wah Phuan, Amanda L Reggi, Loretta Ferrera, Luis J V Galietta, Sarah E Levy, Alannah C Moises, Onur Cil, Elena Diez-Cecilia, Sujin Lee, Alan S Verkman, Marc O Anderson
Transmembrane protein 16A (TMEM16A), also called anoctamin 1 (ANO1), is a calcium-activated chloride channel expressed widely mammalian cells, including epithelia, vascular smooth muscle tissue, electrically excitable cells and some tumors. TMEM16A inhibitors have been proposed for treatment of disorders of epithelial fluid and mucus secretion, hypertension, asthma, and possibly cancer. Herein we report by screening the discovery of 2-acylamino-cycloalkylthiophene-3-carboxylic acid arylamides (AACTs) as inhibitors of TMEM16A, and analysis of 48 synthesized analogs (10ab-10bw) of the original AACT compound (10aa)...
May 11, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28482262/facile-synthesis-of-fluoro-methoxy-and-methyl-substituted-ferrocene-based-urea-complexes-as-potential-therapeutic-agents
#7
Faiza Asghar, Amin Badshah, Bhajan Lal, Shumaila Zubair, Saira Fatima, Ian S Butler
In the present work, the synthesis, characterization (FT-IR, multinuclear ((1)H and (13)C) NMR, AAS, Raman, and elemental analysis), DNA binding (cyclic voltammetry, UV-Vis spectroscopy and viscometry), and in vitro biological assessment of nine new ferrocene-based ureas are reported. The desulphurization of ferrocenyl thioureas to the corresponding oxo analogues using aqueous sodium hydroxide and mercuric chloride led to the ferrocenyl ureas (F1-F9) in high yields. The DNA binding studies performed by cyclic voltammetry and UV-Vis spectroscopy produced results that are in close agreement with one another for the binding constants (K) and an electrostatic mode of interaction was observed...
April 29, 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/28475985/long-alkyl-chain-imidazolium-ionic-liquids-antibiofilm-activity-against-phototrophic-biofilms
#8
G Kiran Kumar Reddy, Y V Nancharaiah, V P Venugopalan
Biofilm formation is problematic and hence undesirable in medical and industrial settings. In addition to bacteria, phototrophic organisms are an integral component of biofilms that develop on surfaces immersed in natural waters. 1-Alkyl-3-methyl imidazolium ionic liquids (IL) with varying alkyl chain length were evaluated for their influence on the formation of monospecies (Navicula sp.) and multispecies biofilms under phototrophic conditions. An IL with a long alkyl side chain, 1-hexadecyl-3-methylimidaazolium chloride ([C16(MIM)][Cl]) retarded growth, adhesion and biofilm formation of Navicula sp...
April 23, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28472890/nickel-catalyzed-cross-coupling-of-allyl-alcohols-with-aryl-or-alkenylzinc-reagents
#9
Bo Yang, Zhong-Xia Wang
Nickel-catalyzed cross-coupling of allyl alcohols with aryl- and alkenylzinc chlorides through C-O bond cleavage was performed. Reaction of (E)-3-phenylprop-2-en-1-ol and 1-aryl-prop-2-en-1-ols with aryl- or alkenylzinc chlorides gave linear cross-coupling products. Reaction of 1-phenyl- or 1-methyl-substituted (E)-3-phenylprop-2-en-1-ol with aryl- or alkenylzinc chlorides resulted in 3-aryl/alkenyl-substituted (E)-(prop-1-ene-1,3-diyl)dibenzenes or 3-aryl/alkenyl-substituted (E)-(but-1-enyl)benzene. Reaction of allyl alcohol with p-Me2NC6H4ZnCl resulted in a mixture of normal coupling product 4-allyl-N,N-dimethylaniline and its isomerized product N,N-dimethyl-4-(prop-1-en-1-yl)aniline...
May 5, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28471173/h-bond-acceptor-parameters-for-anions
#10
Sarah J Pike, Jordan J Hutchinson, Christopher A Hunter
UV/vis absorption titrations have been used to investigate the formation of H-bonded complexes between anionic H-bond acceptors (HBAs) and neutral H-bond donors (HBDs) in organic solvents. Complexes formed by three different HBDs with 15 different anions were studied in chloroform and in acetonitrile. The data were used to determine self-consistent HBA parameters (β) for chloride, bromide, iodide, phosphate diester, acetate, benzoate, perrhenate, nitrate, triflimide, perchlorate, hexafluorophosphate, hydrogen sulfate, methyl sulfonate, triflate, and perfluorobutyl sulfonate...
May 4, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28461739/efficacy-of-transepithelial-corneal-collagen-crosslinking-for-keratoconus-12-month-follow-up
#11
Mohamed A Heikal, Tarek Tawfik Soliman, Ayser Fayed, Abdelmonem M Hamed
PURPOSE: To evaluate the efficacy of transepithelial corneal collagen crosslinking (TE-CXL) in patients with progressive keratoconus. PATIENTS AND METHODS: This is a prospective interventional consecutive study carried out on 30 eyes of 18 patients with progressive keratoconus who underwent TE-CLX using both ParaCel™ (riboflavin 0.25%, hydroxy propyl methyl cellulose, NaCl, ethylenediaminetetraacetic acid [EDTA], Tris, and benzalkonium chloride) and vibeX-Xtra (riboflavin 0...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28456451/high-sensitivity-determination-of-estrogens-in-fish-plasma-using-chemical-derivatization-upstream-uhplc-msms
#12
Ugo Bussy, Yu-Wen Chung-Davidson, Tyler J Buchinger, Ke Li, Weiming Li
This article describes the development and validation of a sensitive LC-MSMS method for determination of estrogen in fish plasma. Dansyl chloride derivatization of the phenol functional group in estrogen was used to enhance the response to atmospheric pressure ionization leading to improve the sensitivity. Individual (13)C internal standards were selected after comparison with deuterated standards. Liquid-liquid extraction (ethyl acetate or methyl tert-butyl ether) and protein precipitation (acetonitrile, methanol or acetone) were compared for the extraction and clean-up of estrogens from fish plasma...
April 27, 2017: Steroids
https://www.readbyqxmd.com/read/28452481/reactions-of-three-lactones-with-cl-od-and-o3-atmospheric-impact-and-trends-in-furan-reactivity
#13
S Ausmeel, C Andersen, O J Nielsen, F F Østerstrøm, M S Johnson, E J K Nilsson
Lactones, cyclic esters of hydroxycarboxylic acids, are interesting biofuel candidates as they can be made from cellulosic biomass and have favorable physical and chemical properties for distribution and use. The reactions of γ-valerolactone (GVL), γ-crotonolactone (2(5H)-F), and α-methyl-γ-crotonolactone (3M-2(5H)-F) with Cl, OD, and O3 were investigated in a static chamber at 700 Torr and 298 ± 2 K. The relative rate method was used to determine kGVL+Cl = (4.56 ± 0.51) × 10(-11), kGVL+OD = (2.94 ± 0...
May 22, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28445148/pkc-and-camk-ii-inhibitions-coordinately-rescue-ischemia-induced-gabaergic-neuron-dysfunction
#14
Li Huang, Chun Wang, Shidi Zhao, Rongjing Ge, Sudong Guan, Jin-Hui Wang
Cerebral ischemia leads to neuronal death for stroke, in which the imbalance between glutamatergic neurons and GABAergic neurons toward neural excitotoxicity is presumably involved. GABAergic neurons are vulnerable to pathological factors and impaired in an early stage of ischemia. The rescue of GABAergic neurons is expected to be the strategy to reserve ischemic neuronal impairment. As protein kinase C (PKC) and calmodulin-dependent protein kinase II (CaMK-II) are activated during ischemia, we have investigated whether the inhibitions of these kinases rescue the ischemic impairment of cortical GABAergic neurons...
April 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28441013/cytotoxicity-of-pyrazine-based-cyclometalated-c-n-pz-c-au-iii-carbene-complexes-impact-of-the-nature-of-the-ancillary-ligand-on-the-biological-properties
#15
Benoît Bertrand, Julio Fernandez-Cestau, Jesus Angulo, Marco M D Cominetti, Zoë A E Waller, Mark Searcey, Maria A O'Connell, Manfred Bochmann
The synthesis of a series of cyclometalated gold(III) complexes supported by pyrazine-based (C^N^C)-type pincer ligands is reported, including the crystal structure of a cationic example. The compounds provide a new platform for the study of antiproliferative properties of gold(III) complexes. Seven complexes were tested: the neutral series (C^N(pz)^C)AuX [X = Cl (1), 6-thioguanine (4), C≡CPh (5), SPh (6)] and an ionic series that included the N-methyl complex [(C^N(pzMe)^C)AuCl]BF4 (7) and the N-heterocyclic carbene complexes [(C^N(pz)^C)AuL](+) with L = 1,3-dimethylbenzimidazol-2-ylidene (2) or 1,3,7,9-tetramethylxanthin-8-ylidene (3)...
May 15, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28437113/development-and-application-of-a-recyclable-high-load-magnetic-co-c-hybrid-romp-derived-benzenesulfonyl-chloride-reagent-and-utility-of-corresponding-analogues
#16
Saqib Faisal, Qin Zang, Pradip K Maity, Agnes Brandhofer, Patrick C Kearney, Oliver Reiser, Robert N Grass, Diana Stoianova, Paul R Hanson
The development and application of high-load, recyclable magnetic Co/C hybrid ROMP-derived benzenesulfonyl chloride and analogues is reported. The regeneration and utility of these reagents in the methylation/alkylation of various carboxylic acids is demonstrated via efficient retrieval of the magnetic reagent with a neodymium magnet. Additional reactions employing the analogue sulfonic acid and in situ generated magnetic benzenesulfonyl azide are also reported.
May 5, 2017: Organic Letters
https://www.readbyqxmd.com/read/28436051/a-novel-mass-spectrometry-based-method-for-simultaneous-determination-of-asymmetric-and-symmetric-dimethylarginine-l-arginine-and-l-citrulline-optimized-for-lc-ms-tof-and-lc-ms-ms
#17
Jerzy Wiśniewski, Mariusz G Fleszar, Joanna Piechowicz, Małgorzata Krzystek-Korpacka, Angelika Chachaj, Andrzej Szuba, Katarzyna Lorenc-Kukula, Leszek Masłowski, Wojciech Witkiewicz, Andrzej Gamian
Nitric oxide (NO) is a regulatory molecule involved in many biological processes. NO is produced by nitric oxide synthase by conversion of L-arginine to L-citrulline. L-arginine methylated derivatives, asymmetric and symmetric dimethylarginines (ADMA and SDMA), regulate L-arginine availability and the activity of nitric oxide synthase. As such, they have been frequently investigated as potential biomarkers in pathologies associated with dysfunctions in NO synthesis. Here, we present a new multistep analytical methodology based on liquid chromatography combined with mass spectrometry for the accurate identification of L-arginine, L-citrulline, ADMA, and SDMA...
April 24, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28435713/crystal-structure-of-trans-di-chloridobis-n-5-5-di-methyl-4-5-di-hydro-3h-pyrrol-2-yl-%C3%AE%C2%BAn-acetamide-palladium-ii-dihydrate
#18
Jamal Lasri, Naser Eltaher Eltayeb, Matti Haukka, Bandar A Babgi
The title complex, [PdCl2(C8H14N2O)2]·2H2O, was obtained by N-O bond cleavage of the oxa-diazo-line rings of the trans-[di-chlorido-bis-(2,5,5-trimethyl-5,6,7,7a-tetra-hydro-pyrrolo-[1,2-b][1,2,4]oxa-diazole-N(1))]palladium(II) complex. The palladium(II) atom exhibits an almost square-planar coordination provided by two trans-arranged chloride anions and a nitro-gen atom from each of the two neutral organic ligands. In the crystal, N-H⋯O, O-H⋯O and O-H⋯Cl hydrogen bonds link complex mol-ecules into double layers parallel to the bc plane...
April 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28433422/postnatal-choline-supplementation-selectively-attenuates-hippocampal-microrna-alterations-associated-with-developmental-alcohol-exposure
#19
Sridevi Balaraman, Nirelia M Idrus, Rajesh C Miranda, Jennifer D Thomas
Prenatal alcohol exposure can result in a range of physical, neuropathological, and behavioral alterations, collectively termed fetal alcohol spectrum disorders (FASD). We have shown that supplementation with the nutrient choline reduces the severity of developmental alcohol-associated deficits in hippocampal-dependent behaviors and normalizes some aspects of hippocampal cholinergic development and DNA methylation patterns. Alcohol's developmental effects may also be mediated, in part, by altering microRNAs (miRNAs) that serve as negative regulators of gene translation...
May 2017: Alcohol
https://www.readbyqxmd.com/read/28428994/a-facile-self-templating-synthesis-of-carbon-frameworks-with-tailored-hierarchical-porosity-for-enhanced-energy-storage-performance
#20
Jie Yang, Gaoran Li, Meidan Cai, Pengju Pan, Zhoupeng Li, Yongzhong Bao, Zhongwei Chen
Herein, we present a facile synthesis of hierarchical carbon frameworks with microporous skeletons and interconnected meso/macropores by employing poly(vinylidene chloride-co-methyl acrylate)-b-polystyrene copolymers as precursors. The obtained porosity can be tuned over a broad range via well-selected block proportions of the precursor, enabling its advantageous applications in target-oriented energy storage systems.
April 21, 2017: Chemical Communications: Chem Comm
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