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https://www.readbyqxmd.com/read/29667909/losartan-does-not-decrease-renal-oxygenation-and-norepinephrine-effects-in-rats-after-resuscitated-haemorrhage
#1
Sofia Jönsson, Jacqueline M Melville, Mediha Becirovic-Agic, Michael Hultström
Renin-angiotensin-system blockers are thought to increase the risk of acute kidney injury after surgery and haemorrhage. We found that Losartan does not cause renal cortical hypoxia after haemorrhage in rats because of decreased renal vascular resistance, but did not evaluate resuscitation. AIM: Study Losartan´s effect on renal cortical and medullary oxygenation, and norepinephrine´s vasopressor effect in a model of resuscitated haemorrhage. METHOD: After seven days Losartan (60 mg/kg/day) or control treatment, male Wistar rats were haemorrhaged 20 % of the blood volume and resuscitated with Ringer's Acetate...
April 18, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29667743/a-combined-25mg-solid-state-nmr-and-ab-initio-dft-approach-to-probe-the-local-structural-differences-in-magnesium-acetate-phases-mg-ch3coo-2-nh2o-n-0-1-4
#2
Valerie Seymour, Stephen Day, Gudrun Scholz, Kerstin Scheurell, Dinu Iuga, John Griffin, Erhard Kemnitz, John Hanna, Mark E Smith
Multinuclear (1H, 13C, 25Mg) solid-state NMR data is reported for a series of magnesium acetate phases Mg(CH3COO)2.nH2O (n = 0 (two polymorphs), 1, 4). The central focus here is 25Mg as this set of compounds provides an expanded range of local magnesium coordinations compared to what has previously been reported in the literature using NMR. These four compounds provide 10 distinct magnesium sites with varying NMR interaction parameters. One of the anhydrous crystal structures (α) has an MgO7 site which is reported, to the best of our knowledge, for the first time...
April 18, 2018: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/29667668/synthesis-of-fused-pyrroles-containing-4-hydroxycoumarins-by-regioselective-metal-free-multicomponent-reactions
#3
Richa Mishra, Asim Jana, Anoop Kumar Panday, Lokman H Choudhury
The reaction of arylglyoxals, 4-hydroxycoumarin, and aromatic amines such as 7-amino-2-methylchromone, 6/7-aminoflavone, 7-amino-4-methylcoumarin, 1-amino-9-fluorenone, 1-aminoanthraquinone and aniline derivatives in acetic acid medium under microwave conditions provides the corresponding regioselective fused pyrroles having hydroxycoumarin and aryl substituents. Alternatively, we have developed another method using in situ arylglyoxals from acetophenone derivatives by I2/DMSO promoted C-H oxidation followed by one-pot three component cyclization reactions to provide similar fused pyrroles...
April 18, 2018: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29667636/-the-distribution-of-2-dimethylamino-ethyl-1-hydroxycyclopentyl-phenyl-acetate-in-the-organism-of-the-warm-blooded-animals-after-its-intra-gastric-administration
#4
V K Shormanov, M F Pravdyuk, V Yu Kuzovlev, N V Shabunina
The objective of the present study was to elucidate the distribution of 2-(dimethylamino)ethyl-(1-hydroxycyclopentyl)(phenyl)acetate in the organism of the warm-blooded animals after its intra-gastric administration. The methods applied in the study included thin layer chromatography in silicagel, aci-nitroprosalt staining reaction, UV-spectrophotometry,, and GC-mass spectrometry. The identification and the quantitation of 2-(dimethylamino)ethyl-(1-hydroxycyclopentyl)(phenyl)acetate in the organs and blood of the warm-blooded animals were carried out within 20, 150, and 360 min after a single intra-gastric administration of 1300 ml of this poisonous substance...
2018: Sudebno-meditsinskaia Ekspertiza
https://www.readbyqxmd.com/read/29666936/assessment-of-toxic-impact-of-metals-on-proline-antioxidant-enzymes-and-biological-characteristics-of-pseudomonas-aeruginosa-inoculated-cicer-arietinum-grown-in-chromium-and-nickel-stressed-sandy-clay-loam-soils
#5
Saima Saif, Mohammad Saghir Khan
Considering the heavy metal risk to soil microbiota and agro-ecosystems, the study was designed to determine metal toxicity to bacteria and to find metal tolerant bacteria carrying multifarious plant growth promoting activities and to assess their impact on chickpea cultivated in stressed soils. Metal tolerant strain SFP1 recognized as Pseudomonas aeruginosa employing 16S rRNA gene sequence determination showed maximum tolerance to Cr (400 μg/ml) and Ni (800 μg/ml) and produced variable amounts of indole acetic acid, HCN, NH3 , and ACC deaminase and could solubilize insoluble phosphates even under Cr (VI) and Ni stress...
April 17, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29666535/effect-of-kaolin-silver-complex-on-the-control-of-populations-of-brettanomyces-and-acetic-acid-bacteria-in-wine
#6
P M Izquierdo-Cañas, R López-Martín, E García-Romero, L González-Arenzana, S Mínguez-Sanz, P Chatonnet, A Palacios-García, A Puig-Pujol
In this work, the effects of kaolin silver complex (KAgC) have been evaluated to replace the use of SO2 for the control of spoilage microorganisms in the winemaking process. The results showed that KAgC at a dose of 1 g/L provided effective control against the development of B. bruxellensis and acetic acid bacteria. In wines artificially contaminated with an initial population of B. bruxellensis at 104 CFU/mL, a concentration proven to produce off flavors in wine, only residual populations of the contaminating yeast remained after 24 days of contact with the additive...
May 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29665997/lower-urinary-tract-symptoms-what-s-new-in-medical-treatment
#7
REVIEW
Benoit Peyronnet, Benjamin M Brucker, Martin C Michel
CONTEXT: Pharmacological treatment is a cornerstone in the management of patients with lower urinary tract symptoms (LUTS). OBJECTIVE: To review emerging evidence in the medical treatment of LUTS. EVIDENCE ACQUISITION: An Embase/Pubmed-based literature search was conducted in December 2017, screening for randomized controlled trials (RCTs), prospective and retrospective series, animal model studies, and reviews on medical treatment of LUTS...
April 14, 2018: European Urology Focus
https://www.readbyqxmd.com/read/29665676/understanding-self-assembly-of-porphyrin-based-surmofs-how-layered-minerals-can-be-useful
#8
Ivan Nikolaevich Meshkov, Alexandra Igorevna Zvyagina, Andrey A Shiryaev, Maximilian Sergeevich Nickolsky, Alexander E Baranchikov, Alexander A Ezhov, Alsu Nugmanova, Yulia Yu Enakieva, Yulia Germanovna Gorbunova, Vladimir Valentinovich Arslanov, Maria A Kalinina
Porphyrin-based metal-organic networks on surfaces are a new class of planar materials with promising features for applications in chemical sensing, catalysis and organic optoelectronics at nanoscale. Herein we studied systematically a series of the SURMOFs assembled from variously meso-carboxyphenyl/pyridyl substituted porphyrins and zinc acetate on template monolayers of graphene oxide via layer-by-layer deposition. This microscopically flat template can initiate the growth of macroscopically uniform SURMOF films exhibiting well-resolved X-ray diffraction...
April 18, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29665650/selenium-nanoparticles-prevents-lead-acetate-induced-hypothyroidism-and-oxidative-damage-of-thyroid-tissues-in-male-rats-through-modulation-of-selenoenzymes-and-suppression-of-mir-224
#9
Hebatallah Husseini Atteia, Manar Hamed Arafa, Kousalya Prabahar
Selenium nanoparticles (Se-NPs) are customizable drug delivery vehicles that show good bioavailability, higher efficacy and lower toxicity than ordinary Se. Pre-treatment of male rats with these NPs has been recently shown to exert a protective effect against chromium-induced thyroid dysfunction. This study, therefore, aimed to investigate and characterize the potential protective mechanism of Se-NPs against lead (Pb) acetate-induced thyrotoxicity. We found that prophylactic and concurrent treatment of Pb acetate-exposed rats with Nano-Se (0...
March 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29665557/negative-effects-of-artemisinin-on-phosphorus-solubilizing-bacteria-in-vitro
#10
Huiwen Zeng, Ling Yuan, Jianguo Huang
The anti-malarial drug artemisinin is extracted from the leaves of Artemisia annua L. Due to toxicity to some microorganisms, the release of artemisinin from this medicinal plant in commercial cultivation might produce a potential risk for phosphorus (P) solubilizing bacteria (PSB). Therefore, the growth, P mobilization, and proton and organic acid efflux by two PSB isolates, Bacillus subtilis and Pseudomonas fluorescens, obtained from the soil without growing A. annua L. in history in the region for growing A...
April 14, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29665554/inhibition-by-non-steroidal-anti-inflammatory-drugs-of-compound-action-potentials-in-frog-sciatic-nerve-fibers
#11
Rika Suzuki, Tsugumi Fujita, Kotaro Mizuta, Eiichi Kumamoto
AIMS: Although antinociception produced by non-steroidal anti-inflammatory drugs (NSAIDs) is partly attributed to nerve conduction inhibition, this has not been thoroughly examined yet. The aim of the present study was to reveal quantitatively how various types of NSAIDs affect compound action potentials (CAPs), a measure of nerve conduction. MAIN METHODS: CAPs were recorded from the frog sciatic nerve by using the air-gap method. KEY FINDINGS: Soaking the sciatic nerve with acetic acid-based NSAIDs (diclofenac and aceclofenac) reduced the peak amplitude of CAP in a concentration-dependent manner; their IC50 values were 0...
April 14, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29665509/a-novel-process-for-volatile-fatty-acids-production-from-syngas-by-integrating-with-mesophilic-alkaline-fermentation-of-waste-activated-sludge
#12
Yue Rao, Jingjing Wan, Yafeng Liu, Irini Angelidaki, Shicheng Zhang, Yalei Zhang, Gang Luo
The present study proposed and demonstrated a novel process for the bioconversion of syngas (mainly CO and H2 ) to valuable volatile fatty acids (VFA) by integrating with mesophilic alkaline fermentation of waste activated sludge (WAS). The results showed that although pH 9 was suitable for VFA production from WAS, 62.5% of the consumed CO was converted to methane due to the presence of hydrogenogenic pathway for CO conversion. The increase of pH from 9 to 9.5 inhibited the methane production from CO because of the possible presence of only acetogenic pathway for CO conversion...
April 11, 2018: Water Research
https://www.readbyqxmd.com/read/29665470/application-of-supercritical-fluid-chromatography-coupled-to-mass-spectrometry-to-the-determination-of-fat-soluble-vitamins-in-selected-food-products
#13
Jean-Marie Oberson, Esther Campos-Giménez, Johann Rivière, Frédéric Martin
In the present manuscript, we describe a fully optimized and validated method suitable to analyse nine compounds (retinyl acetate, retinyl palmitate, retinol, α-tocopherol, α-tocopheryl acetate, cholecalciferol, ergocalciferol, phylloquinone, menaquinone-4) representing the major contributors to the fat-soluble vitamin activity of selected food products (infant formulas, adult nutritionals, infant cereals and mixed meals). Sample preparation involves direct solvent extraction using enzyme-assisted matrix disintegration and methanolic protein precipitation...
April 10, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29665358/hyperinsulinemic-euglycemic-clamp-over-the-first-year-of-use-of-depot-medroxyprogesterone-acetate-as-a-contraceptive
#14
Vaneska Melhado-Kimura, Gisele Almeida Batista, Aglécio Luiz de Souza, Priscilla de Nazaré Silva Dos Santos, Sarah Monte Alegre, Elizabeth João Pavin, Luis Bahamondes, Arlete Fernandes
OBJECTIVE: The literature lacks data on the use of the gold-standard hyperinsulinemic-euglycemic clamp (HEC) technique for the evaluation of insulin resistance (IR) in depot-medroxyprogesterone acetate (DMPA) users. This study assessed carbohydrate metabolism in non-obese users of DMPA using the HEC technique. STUDY DESIGN: A prospective, non-randomized, comparative study conducted at the Family Planning Clinic/Metabolic Unit, University of Campinas, Brazil. Forty-eight women aged 18-39 years underwent HEC: 30 initiating use of DMPA and 18 initiating use of a copper intrauterine device (IUD)...
April 14, 2018: Contraception
https://www.readbyqxmd.com/read/29665293/multi-responsive-supramolecular-gels-based-on-charge-transfer-interactions
#15
Chen Li, Chengshuo Shen, Jiucheng Nie, Huibin Qiu
We report the co-assembly of aromatic donor (D) and acceptor (A) molecules into purple sponge-like supramolecular gels through susceptible charge transfer interactions with the aid of solvophobic interactions. The gel retained intact with the addition of up to 23% (v/v) of nonpolar good solvents, such as toluene and xylene, but dissociated in the presence of < 2% (v/v) of polar solvents, such as tetrahydrofuran, ethyl acetate, and alcohols, with highly distinguishable changes of color. Notably, the gel disappeared in 1 min and the solution turned blue when 0...
April 17, 2018: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/29665169/fes-2-nanoparticles-decorated-graphene-as-microbial-fuel-cell-anode-achieving-high-power-density
#16
Ruiwen Wang, Mei Yan, Huidong Li, Lu Zhang, Benqi Peng, Jinzhi Sun, Da Liu, Shaoqin Liu
Microbial fuel cells (MFCs) have received great attention worldwide due to their potential in recovering electrical energy from waste and inexhaustible biomass. Unfortunately, the difficulty of achieving the high power, especially in real samples, remains a bottleneck for their practical applications. Herein, FeS2 nanoparticles decorated graphene is fabricated via a simple hydrothermal reaction. The FeS2 nanoparticles decorated graphene anode not only benefits bacterial adhesion and enrichment of electrochemically active Geobacter species on the electrode surface but also promotes efficient extracellular electron transfer, thus giving rise to a fast start-up time of 2 d, an unprecedented power density of 3220 mW m-2 and a remarkable current density of 3...
April 17, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29664912/metatranscriptome-analysis-of-the-microbial-fermentation-of-dietary-milk-proteins-in-the-murine-gut
#17
Floor Hugenholtz, Mark Davids, Jessica Schwarz, Michael Müller, Daniel Tomé, Peter Schaap, Guido J E J Hooiveld, Hauke Smidt, Michiel Kleerebezem
Undigestible food ingredients are converted by the microbiota into a large range of metabolites, predominated by short chain fatty acids (SCFA). These microbial metabolites are subsequently available for absorption by the host mucosa and can serve as an energy source. Amino acids fermentation by the microbiota expands the spectrum of fermentation end-products beyond acetate, propionate and butyrate, to include in particular branched-SCFA. Here the long-term effects of high protein-diets on microbial community composition and functionality in mice were analyzed...
2018: PloS One
https://www.readbyqxmd.com/read/29664601/difluorocarbene-as-a-building-block-for-consecutive-bond-forming-reactions
#18
Alexander D Dilman, Vitalij V Levin
Compounds containing a difluoromethylene unit have gained increasing attention due to their utility in drug design. Classic methods for the synthesis of these compounds rely on either harsh deoxofluorination reactions or laborious functional group manipulation sequences. In 2013, we proposed a method for assembling gem-difluorinated molecules from a difluorocarbene, a nucleophile, and an electrophile. In this process, a difluorocarbene can be considered an equivalent of a bipolar CF2 unit. Performing consecutive bond-forming reactions by sequential attachment of a nucleophile and an electrophile to a difluorocarbene provides the opportunity for the synthesis of a wide variety of organofluorine compounds...
April 17, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29664321/eurados-work-on-internal-dosimetry
#19
B Breustedt, E Blanchardon, C-M Castellani, G Etherington, D Franck, A Giussani, W Hofmann, A-L Lebacq, W B Li, D Noßke, M A Lopez
European Radiation Dosimetry Group (EURADOS) Working Group 7 is a network on internal dosimetry that brings together researchers from more than 60 institutions in 21 countries. The work of the group is organised into task groups that focus on different aspects, such as development and implementation of biokinetic models (e.g. for diethylenetriamine penta-acetic acid decorporation therapy), individual monitoring and the dose assessment process, Monte Carlo simulations for internal dosimetry, uncertainties in internal dosimetry, and internal microdosimetry...
January 1, 2018: Annals of the ICRP
https://www.readbyqxmd.com/read/29664172/preparative-enantioseparation-of-loxoprofen-precursor-by-recycling-countercurrent-chromatography-with-hydroxypropyl-%C3%AE-cyclodextrin-as-a-chiral-selector
#20
Hui Zhang, Xujun Qiu, Liqiong Lv, Wenyu Sun, Chaoyue Wang, Jizhong Yan, Shengqiang Tong
Recycling countercurrent chromatography was successfully applied to resolution of 2-(4-bromomethylphenyl)propionic acid, a key synthetic intermediate for synthesis of nonsteroidal anti-inflammatory drug loxoprofen, using hydroxypropyl-β-cyclodextrin as chiral selector. The two-phase solvent system composed of n-hexane/n-butyl acetate/0.1 mol L-1 citrate buffer solution with pH = 2.4 (8:2:10, v/v/v) was selected. Influence factors for the enantioseparation were optimized, including type of substituted β-cyclodextrin, concentration of hydroxypropyl-β-cyclodextrin, separation temperature and pH of aqueous phase...
April 17, 2018: Journal of Separation Science
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