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https://www.readbyqxmd.com/read/28822278/a-carbon-tetrachloride-free-synthesis-of-n-phenyltrifluoroacetimidoyl-chloride
#1
Dylan G M Smith, Spencer J Williams
N-Phenyltrifluoroacetimidoyl chloride (PTFAI-Cl) is a reagent widely used for the preparation of glycosyl N-phenyltrifluoroacetimidates. However, the most commonly applied method requires carbon tetrachloride, a hepatotoxic reagent that has been phased out under the Montreal Protocol. We report a new synthesis of N-phenyltrifluoroacetimidoyl chloride (PTFAI-Cl) using dichlorotriphenylphosphane and triethylamine.
August 10, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/28822156/-hplc-ms-ms-determination-of-residual-amount-of-4-plant-growth-retardants-in-6-dried-root-and-rhizome-herbs
#2
Yu-Yao Zhai, Bao-Lin Guo
HPLC-MS/MS was applied to the determination of residual amount of plant growth retardant such as paclobutrazol, daminozide, chlormequat and mepiquat chloride in dried root and rhizome herbs. The sample was extracted twice with acetonitrile containing 0.1% formic acid. The separation was performed on a Waters Atlantis HILIC column with an elution system consisting of acetonitrile-5 mmol•L⁻¹ ammonium acetate solution with 0.1% formic acid, methanol and acetonitrile. The MS spectrum was acquired in positive mode with multiple reactions monitoring (MRM)...
June 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28821663/agrp-neurons-can-increase-food-intake-during-conditions-of-appetite-suppression-and-inhibit-anorexigenic-parabrachial-neurons
#3
Rachel A Essner, Alison G Smith, Adam A Jamnik, Anna R Ryba, Zoe D Trutner, Matthew E Carter
To maintain energy homeostasis, orexigenic (appetite-inducing) and anorexigenic (appetite suppressing) brain systems functionally interact to regulate food intake. Within the hypothalamus, neurons that express agouti-related protein (AgRP) sense orexigenic factors and orchestrate an increase in food-seeking behavior. In contrast, calcitonin gene-related peptide (CGRP)-expressing neurons in the parabrachial nucleus (PBN) suppress feeding. PBN CGRP neurons become active in response to anorexigenic hormones released following a meal, including amylin, secreted by the pancreas, and cholecystokinin (CCK), secreted by the small intestine...
August 7, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28821547/cultivation-in-space-flight-produces-minimal-alterations-in-the-susceptibility-of-bacillus-subtilis-cells-to-72-different-antibiotics-and-growth-inhibiting-compounds
#4
Michael D Morrison, Patricia Fajardo-Cavazos, Wayne L Nicholson
Past results have suggested that bacterial antibiotic susceptibility is altered during space flight. To test this notion, Bacillus subtilis cells were cultivated in matched hardware, medium, and environmental conditions either in spaceflight microgravity on the International Space Station, termed Flight (FL) samples, or at Earth-normal gravity, termed Ground Control (GC) samples. Susceptibility of FL and GC samples was compared to 72 antibiotics and growth-inhibitory compounds using the Omnilog Phenotype Microarray (PM) system...
August 18, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28821304/determination-of-selenium-and-arsenic-ions-in-edible-mushroom-samples-by-novel-chloride-oxalic-acid-deep-eutectic-solvent-extraction-using-graphite-furnace-atomic-absorption-spectrometry
#5
Rizwan Ali Zounr, Mustafa Tuzen, Muhammad Yar Khuhawar
In present study, we proposed the application of a deep eutectic solvent (DES) made up of choline chloride (ChCl) and oxalic acid (Ox) for the dissolution of different edible mushroom samples for the determination of selenium (Se) and arsenic (As) ions. Therefore, an innovative, green, novel, and inexpensive method based on ChCl–Ox as the DES was developed for the determination of Se and As ions in mushroom species by graphite furnace-atomic absorption spectrometry. The important analytical parameters were also optimized...
August 18, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28821121/reductive-mineralization-of-cellulose-with-vanadium-iron-and-tungsten-chlorides-and-access-to-mxoy-metal-oxides-and-mxoy-c-metal-oxide-carbon-composites
#6
Aurélien Henry, Peter Hesemann, Johan G Alauzun, Bruno Boury
MxOy and MxOy/C composites (M=V, Fe and W) were obtained by mineralization of cellulose with several metal chlorides. Cellulose was used both as a templating agent and as an oxygen and a carbon source. Soluble chloride molecules (VOCl3 and WCl6) and a poorly soluble ionic chloride compound (FeCl3) were chosen as metal oxide precursors. In a first time, primary metal oxide/cellulose composites were obtained via a thermal treatment by reacting urea impregnated filter paper with the corresponding metal chlorides in an autoclave at 150°C after 3days...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821119/tailoring-of-temperature-and-ph-responsive-cotton-fabric-with-antimicrobial-activity-effect-of-the-concentration-of-a-bio-barrier-forming-agent
#7
Danaja Štular, Ivan Jerman, Barbara Simončič, Brigita Tomšič
A stimuli-responsive cotton fabric was designed using temperature and pH-responsive poly-N-isopropylacrylamide (poly-NiPAAm) and chitosan (PNCS) microgel as a carrier of antimicrobially active 3-(trimethoxysilyl)-propyldimethyloctadecyl ammonium chloride (Si-QAC), which forms a bio-barrier on the fibre surface. The influence of Si-QAC on the moisture management and thermoregulation abilities of the PNCS microgel was investigated. Using a pad-dry cure method, Si-QAC was applied to a 100% cotton fabric model in concentrations ranging from 0...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821117/chitosan-based-thin-active-layer-membrane-for-forward-osmosis-desalination
#8
Alireza Shakeri, Hasan Salehi, Masoud Rastgar
A novel hydrophilic chitosan-based thin active layer membrane was elaborately fabricated through a facile method and its performance was studied in forward osmosis (FO) desalination process. Chitosan (CS) was interfacially polymerized with trimesoyl chloride (TMC) monomer on the surface of sulfonated polyethersulfone-polyethersulfone (SPES-PES) support layer. Two different procedures were employed to incorporate CS into the membrane thin active layer structure. The solutions containing different CS concentrations (from 0...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821068/radiation-synthesis-and-performance-of-novel-cellulose-based-microsphere-adsorbents-for-efficient-removal-of-boron-iii
#9
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/28821054/enhanced-hydrolysis-of-bamboo-biomass-by-chitosan-based-solid-acid-catalyst-with-surfactant-addition-in-ionic-liquid
#10
Wenqing Si, Yichen Li, Jie Zheng, Shun'an Wei, Dan Wang
Surfactants were used for the hydrolysis of bamboo biomass to enhance lignocellulose hydrolysis. Tween 80, polyethylene glycol 4000 (PEG 4000), and sodium dodecyl sulfate (SDS) were tested as surfactants for improving the bamboo hydrolysis with a novel sulfonated cross-linked chitosan solid acid catalyst (SCCAC) in ionic liquid (IL). Compared to the use of only SCCAC in 1-Butyl-3-methylimidazolium chloride ([BMIM]Cl), the surfactants facilitated hydrolysis and improved the yield of total reducing sugar (TRS) under the same conditions...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820939/attachment-of-a-ruii-complex-to-a-self-folding-hexaamide-deep-cavitand
#11
Saša Korom, Pablo Ballester
We report the design, synthesis and characterization of a new RuII metallocavitand that is catalytically active in alkene epoxidation reactions. The elaboration of the resorcin[4]arene's aromatic cavity produced a self-folding, deep hex-aamide cavitand featuring a single diverging terpyridine (tpy) group installed at its upper rim. The construction of the metallocavitand involved the initial chelation of a RuIII chloride complex by the tpy ligand followed by the incorpora-tion of 2-(phenylazo)pyridine (azpy) as an ancillary ligand...
August 18, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28820882/correlation-between-mosquito-larval-density-and-their-habitat-physicochemical-characteristics-in-mazandaran-province-northern-iran
#12
Seyed Hassan Nikookar, Mahmoud Fazeli-Dinan, Shahyad Azari-Hamidian, Seyed Nouraddin Mousavinasab, Mohsen Aarabi, Seyyed Payman Ziapour, Yahya Esfandyari, Ahmadali Enayati
Characteristics of mosquito larval habitats are important in determining whether they can survive and successfully complete their developmental stages. Therefore, data on the ecological factors affecting mosquito density and abundance especially the physicochemical properties of water of their breeding sites, can possibly be helpful in implementing larval management programs. Mosquito larvae were collected using a standard 350 ml dipper from fixed habitats including: artificial pool, river edge, creek and etc, in 30 villages of 16 counties from May-December 2014...
August 18, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28820729/head-phantoms-for-electroencephalography-and-transcranial-electric-stimulation-a-skull-material-study
#13
Alexander Hunold, Daniel Strohmeier, Patrique Fiedler, Jens Haueisen
Physical head phantoms allow the assessment of source reconstruction procedures in electroencephalography and electrical stimulation profiles during transcranial electric stimulation. Volume conduction in the head is strongly influenced by the skull, which represents the main conductivity barrier. Realistic modeling of its characteristics is thus important for phantom development. In the present study, we proposed plastic clay as a material for modeling the skull in phantoms. We analyzed five clay types varying in granularity and fractions of fire clay, each with firing temperatures from 550°C to 950°C...
August 18, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28820479/esterification-mechanism-of-bagasse-modified-with-glutaric-anhydride-in-1-allyl-3-methylimidazolium-chloride
#14
Huihui Wang, Wei Chen, Xueqin Zhang, Chuanfu Liu, Runcang Sun
The esterification of bagasse with glutaric anhydride could increase surface adhesion compatibility and the surface of derived polymers has the potential of immobilizing peptides or proteins for biomedical application. Due to its complicated components, the esterification mechanism of bagasse esterified with glutaric anhydride in ionic liquids has not been studied. In this paper, the homogenous esterification of bagasse with glutaric anhydride was comparatively investigated with the isolated cellulose, hemicelluloses, and lignin in 1-allyl-3-methylimidazolium chloride (AmimCl) to reveal the reaction mechanism...
August 18, 2017: Materials
https://www.readbyqxmd.com/read/28820470/adaption-of-fmdv-asia-1-to-suspension-culture-cell-resistance-is-overcome-by-virus-capsid-alterations
#15
Veronika Dill, Bernd Hoffmann, Aline Zimmer, Martin Beer, Michael Eschbaumer
Foot-and-mouth disease virus (FMDV) causes a highly contagious disease with catastrophic economic impact for affected countries. BHK21 suspension cells are preferred for the industrial production of FMDV vaccine antigen, but not all virus strains can be successfully propagated in these cells. Serotype Asia-1 is often affected by this phenomenon. In this study, the Asia-1 strain Shamir was used to examine viral, cellular and environmental factors that contribute to resistance to cell culture infection. Cell media composition, pH and ammonium chloride concentration did not affect Asia-1 differently than other serotypes...
August 18, 2017: Viruses
https://www.readbyqxmd.com/read/28820200/statistical-thermodynamics-unveils-the-dissolution-mechanism-of-cellobiose
#16
Thomas W J Nicol, Noriyuki Isobe, James H Clark, Seishi Shimizu
In the study of the cellulose dissolution mechanism opinion is still divided. Here, the solution interaction components of the most prominent hypotheses for the driving force of cellulose dissolution were evaluated quantitatively. Combining a rigorous statistical thermodynamic theory and cellobiose solubility data in the presence of chloride salts, whose cations progress in the Hofmeister series (KCl, NaCl, LiCl and ZnCl2), we have shown that cellobiose solubilization is driven by the preferential accumulation of salts around the solutes which is stronger than cellobiose hydration...
August 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28820118/arcobacter-haliotis-sp-nov-isolated-from-abalone-species-haliotis-gigantea
#17
Reiji Tanaka, Ilse Cleenwerck, Yukino Mizutani, Shunpei Iehata, Peter Bossier, Peter Vandamme
A Gram-negative, aerobic, polar-flagellated and rod-shaped, sometimes slightly curved bacterium, designated MA5T, was isolated from the gut of an abalone of the species Haliotis gigantea collected in Japan. Phylogenetic analyses based on 16S rRNA, gyrB, hsp60 and rpoB gene sequences placed strain MA5T in the genus Arcobacter in an independent phylogenetic line. Comparison of the 16S rRNA gene sequence of this strain with those of the type strains of the established Arcobacter species revealed A. nitrofigilis (95...
August 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28819708/in-situ-remediation-of-chlorinated-solvent-contaminated-groundwater-using-zvi-organic-carbon-amendment-in-china-field-pilot-test-and-full-scale-application
#18
Jie Yang, Liang Meng, Lin Guo
Chlorinated solvents in groundwater pose threats to human health and the environment due to their carcinogenesis and bioaccumulation. These problems are often more severe in developing countries such as China. Thus, methods for chlorinated solvent-contaminated groundwater remediation are urgently needed. This study presents a technique of in situ remediation via the direct-push amendment injection that enhances the reductive dechlorination of chlorinated solvents in groundwater in the low-permeability aquifer...
August 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28819369/in-vitro-cytotoxic-activities-of-the-oral-platinum-iv-prodrug-oxoplatin-and-hsp90-inhibitor-ganetespib-against-a-panel-of-gastric-cancer-cell-lines
#19
Lukas Klameth, Barbara Rath, Gerhard Hamilton
Gastric cancer exhibits a poor prognosis and is the third most common cause of cancer death worldwide. Chemotherapy of metastatic gastric cancer is based on combinations of platinum drugs and fluoropyrimidines, with added agents. Oxoplatin is a stable oral platinum(IV) prodrug which is converted to a highly active tetrachlorido(IV) complex under acidic conditions. In the present work, we studied the cytotoxic effects of oxoplatin against a panel of four gastric cancer cell lines in vitro. Furthermore, the role of HSP90 in chemoresistance of these lines was investigated using the specific inhibitor ganetespib...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28819273/enhanced-anaerobically-digested-swine-wastewater-treatment-by-the-composite-of-polyaluminum-chloride-pac-and-bacillus-megatherium-g106-derived-eps
#20
Junyuan Guo, Yang Huang, Cheng Chen, Yu Xiao, Jing Chen, Biyu Jian
A strain was isolated from biological sludge to produce EPS by using anaerobically digested swine wastewater (ADSW). Potential of the EPS in ADSW treatment were discussed. Results showed that the optimal fermentation medium for EPS production was determined as 4 g K2HPO4, 2 g KH2PO4, and 2 g sucrose dissolved in 1 L ADSW. After fermentation for 60 h, 2.98 g EPS with main backbone of polysaccharides can be extracted from 1 L of fermentation broth. The EPS showed good performances in ADSW treatment, after conditioned by this EPS, removal efficiencies of COD, ammonia, and TP reached 70...
August 17, 2017: Scientific Reports
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