keyword
MENU ▼
Read by QxMD icon Read
search

Methyl chloride

keyword
https://www.readbyqxmd.com/read/28821068/radiation-synthesis-and-performance-of-novel-cellulose-based-microsphere-adsorbents-for-efficient-removal-of-boron-iii
#1
Siqi Liu, Min Xu, Tianlin Yu, Dong Han, Jing Peng, Jiuqiang Li, Maolin Zhai
A novel cellulose-based microsphere containing glucamine groups, referred as CVN, was successfully synthesized by radiation-induced graft polymerization of 4-vinylbenzyl chloride onto cellulose microspheres and subsequent functionalization with N-methyl-d-glucamine. The adsorption by CVN for boron (III) from aqueous solutions was evaluated systematically by batch adsorption technique. Langmuir models could fit well with the adsorption behavior of CVN. The CVN adsorbents exhibited a high adsorption capacity up to 12...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28813043/folic-acid-supramolecular-ionogels
#2
Rahul Ranjan, Kamla Rawat, H B Bohidar
Herein, we report on folic acid (FA, a low molecular weight gelator) thermoreversible supramolecular organo (in 1 : 1 (v/v) water-DMSO binary solvent), and ionogels made in 1-ethyl-3-methyl imidazolium chloride, [C2mim][Cl], and 1-octyl-3-methyl imidazolium chloride, [C8mim][Cl], solutions with 0.1 ≤ [IL] ≤ 5% (w/v). The self-assembled fibrils of folic acid were largely formed due to secondary forces, such as π-π stacking, H-bonding, and hydrophobic interactions above a gelator concentration of 0...
August 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28808634/white-mineral-trioxide-aggregate-mixed-with-calcium-chloride-dihydrate-chemical-analysis-and-biological-properties
#3
Hany Mohamed Aly Ahmed, Norhayati Luddin, Thirumulu Ponnuraj Kannan, Khairani Idah Mokhtar, Azlina Ahmad
OBJECTIVES: This study aimed to evaluate the chemical and biological properties of fast-set white mineral trioxide aggregate (FS WMTA), which was WMTA combined with calcium chloride dihydrate (CaCl2·2H2O), compared to that of WMTA. MATERIALS AND METHODS: Surface morphology, elemental, and phase analysis were examined using scanning electron microscope (SEM), energy dispersive X-ray microanalysis (EDX), and X-ray diffraction (XRD), respectively. The cytotoxicity and cell attachment properties were evaluated on human periodontal ligament fibroblasts (HPLFs) using methyl-thiazol-diphenyltetrazolium (MTT) assay and under SEM after 24 and 72 hours, respectively...
August 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28801216/a-novel-process-for-separation-of-hazardous-poly-vinyl-chloride-from-mixed-plastic-wastes-by-froth-flotation
#4
Jianchao Wang, Hui Wang, Chongqing Wang, Lingling Zhang, Tao Wang, Long Zheng
A novel method, calcium hypochlorite (CHC) treatment, was proposed for separation of hazardous poly(vinyl chloride) (PVC) plastic from mixed plastic wastes (MPWs) by froth flotation. Flotation behavior of single plastic indicates that PVC can be separated from poly(ethylene terephthalate) (PET), poly(acrylonitrile-co-butadiene-co-styrene) (ABS), polystyrene (PS), polycarbonate (PC) and poly(methyl methacrylate) (PMMA) by froth flotation combined with CHC treatment. Mechanism of CHC treatment was examined by contact angle measurement, scanning electron microscopy, Fourier transform infrared and X-ray photoelectron spectroscopy...
August 8, 2017: Waste Management
https://www.readbyqxmd.com/read/28801044/cationic-ionic-liquid-surfactant-polyacrylamide-gel-electrophoresis-for-enhanced-separation-of-acidic-and-basic-proteins-with-single-step-ribonuclease-b-glycoforms-separation
#5
Punprabhashi Vidanapathirana, Farhana Hasan, Kaitlyn Mussio, Anuja Pande, Michael Brands, Noureen Siraj, Anne Grove, Isiah M Warner
Cationic ionic liquids-based surfactants (ILS), such as 4-methyl pyridinium bromide (CnPBr, where n=4,6,8), were used in preparation of polyacrylamide gels, sample buffer, and running buffer for cationic ILS polyacrylamide gel electrophoresis (ILS-PAGE). These ILS are liquids in the pure state and were selected for improved separation of ribonuclease b (Rib b) glycoforms in a single step and a protein mixture containing bovine serum albumin (BSA, pI-4.8, 66.5kDa), ovalbumin (Ova, pI-4.6, 44.3kDa), α-chymotrypsinogen (α-Chy, pI-8...
July 29, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28800906/solid-phase-analytical-derivatization-for-gas-chromatography-mass-spectrometry-based-metabolomics
#6
Emi Takeo, Ryoichi Sasano, Shuichi Shimma, Takeshi Bamba, Eiichiro Fukusaki
A novel derivatization method for gas chromatography/mass spectrometry (GC/MS)-based metabolomics was developed, based on solid-phase analytical derivatization (SPAD) with methoximation followed by trimethylsilylation. This SPAD method realized derivatization on solid phases combining strong anion exchange with strong cation exchange. To omit a sample condensation process, GC/MS injection was performed using a large-volume injection mode. This mode uses a stomach-shaped insert, and enables a large quantity of sample to be vaporized and introduced into the GC/MS system...
August 8, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28799928/greywater-characterization-and-handling-practices-among-urban-households-in-ghana-the-case-of-three-communities-in-kumasi-metropolis
#7
Bismark Dwumfour-Asare, Philomina Adantey, Kwabena Biritwum Nyarko, Eugene Appiah-Effah
Greywater management in Ghana receives little or no attention although untreated greywater is associated with environmental and public health risks. This paper assesses greywater characteristics and handling practices among urban households in three selected communities in Kumasi, the second largest city of Ghana. The study involved in-depth surveys (interviews and observations) with 90 households, and collection of 18 greywater samples from nine greywater sources for laboratory analysis. Average greywater generation is 43...
August 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28799134/roles-of-polar-groups-and-aromatic-structures-of-biochar-in-1-methyl-3-octylimidazolium-chloride-ionic-liquid-adsorption-ph-effect-and-thermodynamics-study
#8
Qiuci Miao, Erping Bi, Binghua Li
Adsorption mechanisms of 1-methyl-3-octylimidazolium chloride ([OMIM]Cl) on rice straw-derived biochars produced at 400, 500, and 700 °C (referred as RB400, RB500, and RB700, respectively) were evaluated. Adsorption affinity followed the order of RB700 > RB400 > RB500. Electrostatic attraction and hydrogen bond controlled adsorption of [OMIM]Cl on RB400, while π-π EDA interaction between [OMIM]Cl and the aromatic rings of biochar dominated adsorption of RB500 and RB700. With increasing solution pH, -COOH and -OH on biochar became deprotonated...
August 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28792108/comprehensive-headspace-gas-chromatographic-analysis-of-denaturants-in-denatured-ethanol
#9
Niels van Boxtel, Kris Wolfs, Marta Guillén Palacín, Ann Van Schepdael, Erwin Adams
To discourage consumption, ethanol is often denatured using both volatile (e.g. methyl ethyl ketone and isopropanol) and non-volatile (e.g. denatonium benzoate) chemical substances. As a result, the analysis of denatured ethanol samples is usually performed by multiple techniques such as gas chromatography for the volatile denaturants and liquid chromatography for the non-volatile ones. However, the need for multiple techniques increases the cost of analysis and forms a severe obstruction for on-site product control...
August 9, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28783007/influence-of-the-chain-length-of-surfactant-in-the-modification-of-zeolites-and-clays-removal-of-atrazine-from-water-solutions
#10
Helen Paola Toledo-Jaldin, Alien Blanco-Flores, Víctor Sánchez-Mendieta, Osnieski Martín-Hernández
Removal potentials of a surfactant modified zeolite (SMZ) and clay (SMC) for atrazine adsorption were evaluated. Materials were modified with hexadecyl trimethyl ammonium bromide (HDTMA) and benzyl octadecyl dimethyl ammonium chloride (BODA) considering the critical miscelar concentration (CMC) of each one (0.94 and 0.041 meq/L, respectively). The influence of the surfactant was analyzed in detail, particularly the formation of surfactant layers (complete or partial) connected with the length of the surfactant tail (16 and 18 methyl groups or number of carbons in the chain)...
August 7, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28776513/crystal-structure-and-spectroscopic-characterization-of-a-cobalt-ii-tetraazamacrocycle-completing-a-series-of-first-row-transition-metal-complexes
#11
Katherine M Van Heuvelen, Isabell Lee, Katherine Arriola, Rilke Griffin, Christopher Ye, Michael K Takase
The tetraazamacrocyclic ligand 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane (TMC) has been used to bind a variety of first-row transition metals but to date the crystal structure of the cobalt(II) complex has been missing from this series. The missing cobalt complex chlorido(1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane-κ(4)N)cobalt(II) chloride dihydrate, [CoCl(C14H32N4)]Cl·2H2O or [Co(II)Cl(TMC)]Cl·2H2O, crystallizes as a purple crystal. This species adopts a distorted square-pyramidal geometry in which the TMC ligand assumes the trans-I configuration and the chloride ion binds in the syn-methyl pocket of the ligand...
August 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/28773839/aluminium-electrodeposition-from-ionic-liquid-effect-of-deposition-temperature-and-sonication-%C3%A2
#12
Enrico Berretti, Andrea Giaccherini, Stefano M Martinuzzi, Massimo Innocenti, Thomas J S Schubert, Frank M Stiemke, Stefano Caporali
Since their discovery, ionic liquids (ILs) have attracted a wide interest for their potential use as a medium for many chemical processes, in particular electrochemistry. As electrochemical media they allow the electrodeposition of elements that are impossible to reduce in aqueous media. We have investigated the electrodeposition of aluminium from 1-butyl-3-methyl-imidazolium chloride ((Bmim)Cl)/AlCl₃ (40/60 mol %) as concerns the effect of deposition parameters on the quality of the deposits. Thick (20 μm) aluminium coatings were electrodeposited on brass substrates at different temperatures and mixing conditions (mechanical stirring and sonication)...
August 24, 2016: Materials
https://www.readbyqxmd.com/read/28771333/highly-cytotoxic-palladium-ii-pincer-complexes-based-on-picolinylamides-functionalized-with-amino-acids-bearing-ancillary-s-donor-groups
#13
Svetlana G Churusova, Diana V Aleksanyan, Ekaterina Yu Rybalkina, Olga Yu Susova, Valentina V Brunova, Rinat R Aysin, Yulia V Nelyubina, Alexander S Peregudov, Evgenii I Gutsul, Zinaida S Klemenkova, Vladimir A Kozlov
The reactions of picolinyl and 4-chloropicolinyl chlorides with methyl esters of S-methyl-l-cysteine, l- and d-methionine, and l-histidine afforded a series of functionalized carboxamides, which readily formed pincer-type complexes upon interaction with PdCl2(NCPh)2 in solution under mild conditions. The direct cyclopalladation of the ligands derived was also accomplished in the solid phase, in particular, mechanochemically, although it was complicated by the partial deactivation of the starting amides. The resulting complexes with 5,5- and 5,6-membered fused metallocycles were fully characterized by IR and NMR spectroscopy, including variable-temperature and 2D-NMR studies...
August 3, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28771002/importance-of-steric-influences-in-the-construction-of-multicomponent-hybrid-polymetallic-clusters
#14
Ross McLellan, Maria A Palacios, Sergio Sanz, Euan K Brechin, Scott J Dalgarno
The straightforward room temperature synthesis of hybrid polymetallic manganese clusters is investigated, exploiting complementary ligand combinations of p-tert-butylcalix[4]arene and salicylaldoximes. Eight new [Mn(III)7Mn(II)] clusters have been prepared wherein the simple substitution of alkyl or aryl groups at well-defined positions of the salicylaldoxime scaffold leads to two distinct structure types that, while exhibiting the same general topology, contain the unique Mn(II) ion in different positions...
August 3, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28763166/comparison-of-three-methods-for-the-methylation-of-aliphatic-and-aromatic-compounds
#15
Hyejung Lee, Sarah J Feakins, Zhiyao Lu, Arndt Schimmelmann, Alex L Sessions, Jessica E Tierney, Travis J Williams
RATIONALE: Methylation protocols commonly call for acidic, hot conditions that are known to promote organic (1) H/(2) H exchange in aromatic and aliphatic C-H bonds. Here we tested two such commonly-used methods and compared a third that avoids these acidic conditions, to quantify isotope effects with each method and to directly determine acidic-exchange rates relevant to experimental conditions. METHODS: We compared acidic and non-acidic methylation approaches catalyzed by hydrochloric acid, acetyl chloride and EDCI (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide) / DMAP (4-dimethylaminopyridine) respectively...
August 1, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28749046/pot-economical-total-synthesis-of-estradiol-methyl-ether-through-the-use-of-an-organocatalyst
#16
Yujiro Hayashi, Seitaro Koshino, Kanna Ojima, Eunsang Kwon
Enantioselective total synthesis of estradiol methyl ether has been accomplished in a pot economical manner using five reaction vessels with four purifications. The key reaction is diphenylprolinol silyl ether mediated domino Michael/aldol reaction to afford bicyclo[4.3.0]nonane derivatives with A, C and D rings of steroids as a single isomer with excellent enantioselectivity. Six reactions such as oxidation, hydrogenation, formation of acid chloride, Friedel-Crafts reaction, deprotection and reduction can be carried out in the last one-pot sequence...
July 27, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28744918/essential-oils-and-hydrophilic-extracts-from-the-leaves-and-flowers-of-succisa-pratensis-moench-and-their-biological-activity
#17
Ewa Witkowska-Banaszczak, Jolanta Długaszewska
OBJECTIVES: This study was undertaken to evaluate the antioxidant activity of methanol and water extracts from Succisa pratensis Moench (Dipsacaceae) leaves and flowers as well as the chemical composition of the essential oils found in them and the antimicrobial activity of the oils and extracts thereof. METHODS: The essential oils from S. pratensis leaves and flowers were analysed by the GC-MS. The total phenolic content was determined with Folin-Ciocalteu, that of flavonoids with aluminium chloride and that of phenolic acids with Arnov's reagent...
July 26, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28738570/determination-of-selected-bisphenols-parabens-and-estrogens-in-human-plasma-using-lc-ms-ms
#18
Lucie Kolatorova Sosvorova, Tereza Chlupacova, Jana Vitku, Martin Vlk, Jiri Heracek, Luboslav Starka, David Saman, Marketa Simkova, Richard Hampl
In this study, a novel liquid chromatography - tandem mass spectrometry method for the simultaneous determination of bisphenols (BPA, BPS, BPF, BPAF), parabens (methyl-, ethyl-, propyl-, butyl-, benzyl-paraben) and estrogens (estrone, estradiol, estriol) in human plasma is presented. Since all analytes possess the phenolic group, dansyl chloride derivatization was applied in order to gain high sensitivity. The method was validated according to FDA guidelines, and all validation requirements were satisfactory...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28734368/exploring-pralidoxime-chloride-as-a-universal-electrochemical-probe-for-organophosphorus-pesticides-detection
#19
Qiqi Zheng, Yuan Chen, Kai Fan, Jian Wu, Yibin Ying
An electrochemical method based on non-enzymatic inhibition for the determination of organophosphorus pesticide (OPPs) using pralidoxime chloride (PAM-Cl) as a universal electrochemical probe was reported. Cyclic voltammetry was performed to characterize the redox properties of pralidoxime and OPPs. Differential pulse voltammetry (DPV) was carried out to analyze the influence of anion (chloride and iodide ions), to optimize the pH of testing condition, and to explore the relationship between pralidoxime and OPPs...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28723155/inhibiting-the-fibrillation-of-serum-albumin-proteins-in-the-presence-of-surface-active-ionic-liquids-sails-at-low-ph-spectroscopic-and-microscopic-study
#20
Sangita Kundu, Chiranjib Banerjee, Nilmoni Sarkar
One of the key necessary steps to prevent human neurological disorders is the efficient disruption of protein aggregation or amyloid fibril. In this article, we have explored the effect of three amphiphilic surface active ionic liquids (SAILs), namely 1-methyl-3-octylimidazolium chloride ([C8mim]Cl), 1-dodecyl-3-methyllimidazolium chloride ([C12mim]Cl), and 1-hexadecyl-3-methyllimidazolium chloride ([C16mim]Cl) having concentrations of 5.8, 0.29, and 0.08 mM, respectively, on bovine serum albumin (BSA) and human serum albumin (HSA) fibril...
August 4, 2017: Journal of Physical Chemistry. B
keyword
keyword
11589
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"