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[PMID]: 29524684
[Au] Autor:Aslan DI; Özogul B; Ceylan S; Geyikçi F
[Ad] Address:Ondokuz Mayis University, Faculty of Engineering, Chemical Engineering Department, 55139 Kurupelit, Samsun, Turkey.
[Ti] Title:Thermokinetic analysis and product characterization of Medium Density Fiberboard pyrolysis.
[So] Source:Bioresour Technol;258:105-110, 2018 Feb 28.
[Is] ISSN:1873-2976
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:This study investigates the pyrolysis of Medium Density Fiberboard (MDF) as a potential waste management solution. Thermal behaviour of MDF was analysed via TG/DSC. The primary decomposition step occurred between 190 °C and 425 °C. Evolved gaseous products over this step were evaluated by a FTIR spectrometer coupled with TGA. Peaks for phenolic, alcohols and aldehydes were detected at the maximum decomposition temperature. Py-GC/MS analysis revealed phenols, ketones and cyclic compounds as the primary non-condensable pyrolysis products. The kinetics of pyrolysis were investigated by the widely applied Distributed Activation Energy Model, resulting in an average activation energy and pre-exponential factor of 127.40 kJ mol and 8.4E+11. The results of this study suggest that pyrolyzing MDF could potentially provide renewable fuels and prevent environmental problems related with MDF disposal.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher

  2 / 57029 MEDLINE  
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[PMID]: 29524174
[Au] Autor:Radosevic K; Canak I; Panic M; Markov K; Bubalo MC; Frece J; Srcek VG; Redovnikovic IR
[Ad] Address:Laboratory for Cell Technology, Application and Biotransformations, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000, Zagreb, Croatia.
[Ti] Title:Antimicrobial, cytotoxic and antioxidative evaluation of natural deep eutectic solvents.
[So] Source:Environ Sci Pollut Res Int;, 2018 Mar 09.
[Is] ISSN:1614-7499
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:Natural deep eutectic solvents (NADES) are a new generation of green solvents. They are mixtures of two or three compounds such as choline chloride as a cationic salt and alcohols, acids, amides, amines or sugars as hydrogen-bond donors. Although the majority of NADES' components are of natural origin and therefore NADES are often presumed to be non-toxic, the evaluation of their toxicity and biodegradability must accompany the research on their synthesis and application. Therefore, the aim of this work was to investigate the effect of ten synthesised NADES towards bacteria (i.e., Escherichia coli, Proteus mirabilis, Salmonella typhimurium, Pseudomonas aeruginosa, Staphylococcus aureus), yeast (i.e., Candida albicans) and human cell lines (i.e., HeLa, MCF-7 and HEK293T). In addition, oxygen radical absorbance capacity (ORAC) method was used to determine the antioxidative activity of the tested NADES. Differences in toxicity response between microorganisms and cell lines were observed, and only NADES that contained organic acid showed toxicity towards the test systems. Furthermore, the NADES containing compounds that possess antioxidative activity also showed antioxidative activity. However, research whose primary purpose is the synthesis and application of NADES must be followed by an evaluation of their biological properties (e.g., antimicrobial activity, toxicity towards animal cells and antioxidative or other biological activity) to find the solvent with the best profile for wider industrial applications.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher
[do] DOI:10.1007/s11356-018-1669-z

  3 / 57029 MEDLINE  
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[PMID]: 29522345
[Au] Autor:Campagne R; Schäkel F; Guillot R; Alezra V; Kouklovsky C
[Ad] Address:Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR CNRS No. 8182 , Univ. Paris-Sud, Université Paris-Saclay , F-91405 Orsay , France.
[Ti] Title:Base-Mediated Fragmentation of Bicyclic Dihydro-3,6-oxazines: Transformation of Nitroso Diels-Alder Cycloadducts.
[So] Source:Org Lett;, 2018 Mar 09.
[Is] ISSN:1523-7052
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Nitroso Diels-Alder cycloadditions of benzene oxide with various acyl-nitroso derivatives are described. Treatment of these cycloadducts with methyllithium results in a fast fragmentation reaction, leading to highly functionalized cyclic amino alcohols. The mechanism of the reaction and the role of the epoxide in the fragmentation process are investigated. The reaction proceeds via the formation of an unsaturated imine, which tautomerizes to an enamine if no neighboring epoxide is present.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[St] Status:Publisher
[do] DOI:10.1021/acs.orglett.8b00426

  4 / 57029 MEDLINE  
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[PMID]: 29377922
[Au] Autor:Sage M; Nadeau M; Forand-Choinière C; Mousseau J; Vandamme J; Berger C; Tremblay-Roy JS; Tissier R; Micheau P; Fortin-Pellerin É
[Ad] Address:Department of Pediatrics and Department of Pharmacology and Physiology, Université de Sherbrooke, Sherbrooke, Québec, Canada.
[Ti] Title:Assessing the impacts of total liquid ventilation on left ventricular diastolic function in a model of neonatal respiratory distress syndrome.
[So] Source:PLoS One;13(1):e0191885, 2018.
[Is] ISSN:1932-6203
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:BACKGROUND: Filling the lung with dense liquid perfluorocarbons during total liquid ventilation (TLV) might compress the myocardium, a plausible explanation for the instability occasionally reported with this technique. Our objective is to assess the impacts of TLV on the cardiovascular system, particularly left ventricular diastolic function, in an ovine model of neonatal respiratory distress syndrome. METHOD: Eight newborns lambs, 3.0 ± 0.4 days (3.2 ± 0.3kg) were used in this crossover experimental study. Animals were intubated, anesthetized and paralyzed. Catheters were inserted in the femoral and pulmonary arteries. A high-fidelity pressure catheter was inserted into the left ventricle. Surfactant deficiency was induced by repeated lung lavages with normal saline. TLV was then conducted for 2 hours using a liquid ventilator prototype. Thoracic echocardiography and cardiac output assessment by thermodilution were performed before and during TLV. RESULTS: Left ventricular end diastolic pressure (LVEDP) (9.3 ± 2.1 vs. 9.2 ± 2.4mmHg, p = 0.89) and dimension (1.90 ± 0.09 vs. 1.86 ± 0.12cm, p = 0.72), negative dP/dt (-2589 ± 691 vs. -3115 ± 866mmHg/s, p = 0.50) and cardiac output (436 ± 28 vs. 481 ± 59ml/kg/min, p = 0.26) were not affected by TLV initiation. Left ventricular relaxation time constant (tau) slightly increased from 21.5 ± 3.3 to 24.9 ± 3.7ms (p = 0.03). Mean arterial systemic (48 ± 6 vs. 53 ± 7mmHg, p = 0.38) and pulmonary pressures (31.3 ± 2.5 vs. 30.4 ± 2.3mmHg, p = 0.61) were stable. As expected, the inspiratory phase of liquid cycling exhibited a small but significant effect on most variables (i.e. central venous pressure +2.6 ± 0.5mmHg, p = 0.001; LVEDP +1.18 ± 0.12mmHg, p<0.001). CONCLUSIONS: TLV was well tolerated in our neonatal lamb model of severe respiratory distress syndrome and had limited impact on left ventricle diastolic function when compared to conventional mechanical ventilation.
[Mh] MeSH terms primary: Diastole
Disease Models, Animal
Liquid Ventilation/methods
Respiratory Distress Syndrome, Newborn/therapy
Ventricular Function, Left
[Mh] MeSH terms secundary: Animals
Animals, Newborn
Fluorocarbons/pharmacokinetics
Respiratory Distress Syndrome, Newborn/physiopathology
Sheep
[Pt] Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Name of substance:0 (Fluorocarbons); Q1D0Q7R4D9 (perflubron)
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[Js] Journal subset:IM
[Da] Date of entry for processing:180130
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191885

  5 / 57029 MEDLINE  
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[PMID]: 29367483
[Au] Autor:Matsuura T; Ogawa A; Ohara Y; Nishina S; Nakanishi M; Gohtani S
[Ad] Address:Department of Applied Biological Science, Kagawa University.
[Ti] Title:Effect of Alcohols on the Phase Behavior and Emulsification of a Sucrose Fatty Acid Ester/Water/Edible Oil System.
[So] Source:J Oleo Sci;67(2):167-176, 2018 Feb 01.
[Is] ISSN:1347-3352
[Cp] Country of publication:Japan
[La] Language:eng
[Ab] Abstract:The effect of alcohols (ethanol, 1-propanol, propylene glycol, glycerin, sucrose) on the phase behavior and emulsification of sucrose stearic acid ester (SSE)/water/edible vegetable oil (EVO) systems was investigated. Adding sucrose, propylene glycol, and glycerin narrowed the oil-separated two-phase region in the phase diagram of the SSE/water/EVO systems, whereas adding ethanol and 1-propanol expanded the oil-separated two-phase region. Changing the course of emulsification in the phase diagram showed that the size of the oil-droplet particle typically decreased in a system with a narrowed oil-separated region. The emulsification properties of the systems varied with respect to changes in the phase diagram. The microstructure of the systems was examined using small-angle X-ray scattering, and the ability to retain the oil in the lamellar structure of the SSEs was suggested as an important role in emulsification, because the mechanism of the systems was the same as that for the liquid crystal emulsification method.
[Mh] MeSH terms primary: Alcohols/chemistry
Esters/chemistry
Fatty Acids/chemistry
Phase Transition
Plant Oils/chemistry
Stearic Acids/chemistry
Sucrose/chemistry
Water/chemistry
[Mh] MeSH terms secundary: Emulsions
Glycerol/chemistry
Propylene Glycol/chemistry
Scattering, Small Angle
X-Ray Diffraction
[Pt] Publication type:JOURNAL ARTICLE
[Nm] Name of substance:0 (Alcohols); 0 (Emulsions); 0 (Esters); 0 (Fatty Acids); 0 (Plant Oils); 0 (Stearic Acids); 059QF0KO0R (Water); 4ELV7Z65AP (stearic acid); 57-50-1 (Sucrose); 6DC9Q167V3 (Propylene Glycol); PDC6A3C0OX (Glycerol)
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[Js] Journal subset:IM
[Da] Date of entry for processing:180126
[St] Status:MEDLINE
[do] DOI:10.5650/jos.ess17146

  6 / 57029 MEDLINE  
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[PMID]: 29214539
[Au] Autor:Barroso PJ; Martín J; Santos JL; Aparicio I; Alonso E
[Ad] Address:Department of Analytical Chemistry, Escuela Politécnica Superior, University of Seville, C/ Virgen de África 7, 41011, Seville, Spain.
[Ti] Title:Analytical method for the evaluation of the outdoor air contamination by emerging pollutants using tree leaves as bioindicators.
[So] Source:Anal Bioanal Chem;410(2):417-428, 2018 Jan.
[Is] ISSN:1618-2650
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:In this work, an analytical method, based on sonication-assisted extraction, clean-up by dispersive solid-phase extraction and determination by liquid chromatography-tandem mass spectrometry, has been developed and validated for the simultaneous determination of 15 emerging pollutants in leaves from four ornamental tree species. Target compounds include perfluorinated organic compounds, plasticizers, surfactants, brominated flame retardant, and preservatives. The method was optimized using Box-Behnken statistical experimental design with response surface methodology and validated in terms of recovery, accuracy, precision, and method detection and quantification limits. Quantification of target compounds was carried out using matrix-matched calibration curves. The highest recoveries were achieved for the perfluorinated organic compounds (mean values up to 87%) and preservatives (up to 88%). The lowest recoveries were achieved for plasticizers (51%) and brominated flame retardant (63%). Method detection and quantification limits were in the ranges 0.01-0.09 ng/g dry matter (dm) and 0.02-0.30 ng/g dm, respectively, for most of the target compounds. The method was successfully applied to the determination of the target compounds on leaves from four tree species used as urban ornamental trees (Citrus aurantium, Celtis australis, Platanus hispanica, and Jacaranda mimosifolia). Graphical abstract Analytical method for the biomonitorization of emerging pollutants in outdoor air.
[Mh] MeSH terms primary: Air Pollutants/analysis
Fluorocarbons/analysis
Plant Leaves/chemistry
Solid Phase Extraction/methods
Tandem Mass Spectrometry/methods
Trees/chemistry
[Mh] MeSH terms secundary: Air Pollution/analysis
Chromatography, High Pressure Liquid/methods
Citrus/chemistry
Environmental Biomarkers
Flame Retardants/analysis
Limit of Detection
Plasticizers/analysis
Sonication/methods
Surface-Active Agents/analysis
Ulmaceae/chemistry
[Pt] Publication type:EVALUATION STUDIES; JOURNAL ARTICLE
[Nm] Name of substance:0 (Air Pollutants); 0 (Environmental Biomarkers); 0 (Flame Retardants); 0 (Fluorocarbons); 0 (Plasticizers); 0 (Surface-Active Agents)
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[Js] Journal subset:IM
[Da] Date of entry for processing:171208
[St] Status:MEDLINE
[do] DOI:10.1007/s00216-017-0733-8

  7 / 57029 MEDLINE  
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[PMID]: 28942275
[Au] Autor:Yadav P; Kaur R; Kanwar MK; Sharma A; Verma V; Sirhindi G; Bhardwaj R
[Ad] Address:Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
[Ti] Title:Castasterone confers copper stress tolerance by regulating antioxidant enzyme responses, antioxidants, and amino acid balance in B. juncea seedlings.
[So] Source:Ecotoxicol Environ Saf;147:725-734, 2018 Jan.
[Is] ISSN:1090-2414
[Cp] Country of publication:Netherlands
[La] Language:eng
[Ab] Abstract:The aim of the present study was to explore the effect of exogenous application of castasterone (CS) on physiologic and biochemical responses in Brassica juncea seedlings under copper (Cu) stress. Seeds were pre-soaked in different concentrations of CS and grown for 7 days under various levels of Cu. The exposure of B. juncea to higher levels of Cu led to decrease of morphologic parameters, with partial recovery of length and fresh weight in the CS pre-treated seedlings. Metal content was high in both roots and shoots under Cu exposure while the CS pre-treatment reduced the metal uptake. Accumulation of hydrogen peroxide (H O ) and superoxide anion radical (O ) were chosen as stress biomarker and higher levels of H O (88.89%) and O (62.11%) showed the oxidative stress in metal treated B. juncea seedlings, however, CS pre-treatment reduced ROS accumulation in Cu-exposed seedlings. The Cu exposures lead to enhance the plant's enzymatic and non-enzymatic antioxidant system. It was observed that enzymatic activities of ascorbate peroxidase (APOX), dehydroascorbate reductase (DHAR), and glutathione reductase (GR), glutathione perxoidase (GPOX) and gultrathione-s-transferase increased while activity of monodehydroascorbate reductase (MDHAR) decreased under Cu stress. The pre-treatment with CS positively affected the activities of enzymes. RT-PCR analysis showed that mRNA transcript levels were correlated with total enzymatic activity of DHAR, GR, GST and GSH. Increase in the gene expression of DHAR (1.85 folds), GR (3.24 folds), GST-1 (2.00 folds) and GSH-S (3.18 folds) was noticed with CS pre-treatment. Overall, the present study shows that Cu exposure induced severe oxidative stress in B. juncea plants and exogenous application of CS improved antioxidative defense system by modulating the ascorbate-glutathione cycle and amino acid metabolism.
[Mh] MeSH terms primary: Antioxidants/metabolism
Cholestanols/pharmacology
Copper/toxicity
Mustard Plant/drug effects
Oxidative Stress/drug effects
Soil Pollutants/toxicity
[Mh] MeSH terms secundary: Amino Acids/metabolism
Copper/metabolism
Dose-Response Relationship, Drug
Gene Expression/drug effects
Hydrogen Peroxide/metabolism
Mustard Plant/enzymology
Mustard Plant/genetics
Soil Pollutants/metabolism
[Pt] Publication type:JOURNAL ARTICLE
[Nm] Name of substance:0 (Amino Acids); 0 (Antioxidants); 0 (Cholestanols); 0 (Soil Pollutants); 789U1901C5 (Copper); 80736-41-0 (castasterone); BBX060AN9V (Hydrogen Peroxide)
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[Js] Journal subset:IM
[Da] Date of entry for processing:170925
[St] Status:MEDLINE

  8 / 57029 MEDLINE  
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[PMID]: 29520720
[Au] Autor:Resende LV; Pinheiro LK; Miguel MGDCP; Ramos CL; Vilela DM; Schwan RF
[Ad] Address:Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil.
[Ti] Title:Microbial community and physicochemical dynamics during the production of 'Chicha', a traditional beverage of Indigenous people of Brazil.
[So] Source:World J Microbiol Biotechnol;34(3):46, 2018 Mar 08.
[Is] ISSN:1573-0972
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:The microbial community of artisanal corn fermentation called Chicha were isolated, purified and then identified using protein profile by Matrix Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF) and confirmed by partial ribosomal gene sequencing. Samples from Chicha beverage were chemically characterized by gas and liquid chromatography (HPLC and GC-MS). Aerobic mesophilic bacteria (AMB) (35.8% of total of isolated microorganisms), lactic acid bacteria (LAB) (21.6%) and yeast (42.6%) were identified. Species of the genera Klebsiella, Bacillus, Staphylococcus, Micrococcus, Enterobacter, and Weissella were identified. Rhodotorula mucilaginosa, Lodderomyces elongisporus, Candida metapsilosis, and C. bohicensis were the yeasts found. The LAB isolates detected were responsible for the high concentrations of lactic acid found during the fermentation process (1.2 g L ), which is directly related to the decrease in pH values (from 6.95 to 3.70). Maltose was the main carbohydrate detected during corn fermentation (7.02 g L with 36 h of fermentation). Ethanol was found in low concentrations (average 0.181 g L ), making it possible to characterize the beverage as non-alcoholic. Twelve volatile compounds were identified by gas chromatography; belonging to the groups acids, alcohols aldehydes, acetate and others. MALDI-TOF was successfully used for identification of microbiota. Weissella confusa and W. cibaria were detected in the final product (after 36 h of fermentation), W. confusa is often classified as probiotic and deserve further application studies.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[St] Status:In-Process
[do] DOI:10.1007/s11274-018-2429-4

  9 / 57029 MEDLINE  
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[PMID]: 29517906
[Au] Autor:Rukkijakan T; Akkarasamiyo S; Sawadjoon S; Samec JSM
[Ti] Title:Pd-catalyzed substitution of the OH group of non-derivatized allylic alcohols by phenols.
[So] Source:J Org Chem;, 2018 Mar 08.
[Is] ISSN:1520-6904
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Non-activated phenols have been employed as nucleophiles in the allylation of non-derivatized allylic alcohols to generate allylated phenolic ethers with water as the only by-product. A Pd[BiPhePhos] catalyst was found to be reactive to give the O-allylated phenols in good to excellent yields in the presence of molecular sieves. The reactions are chemoselective in which the kinetically favored O-allylated products are formed exclusively over the thermodynamically favored C-allylated products.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180308
[Lr] Last revision date:180308
[St] Status:Publisher
[do] DOI:10.1021/acs.joc.7b03274

  10 / 57029 MEDLINE  
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[PMID]: 29510625
[Au] Autor:Toribio AR; Prisle NL; Wexler AS
[Ad] Address:Mechanical and Aerospace Engineering , University of California , Davis , California 95616 , United States.
[Ti] Title:Statistical Mechanics of Multilayer Sorption: Surface Concentration Modeling and XPS Measurement.
[So] Source:J Phys Chem Lett;:1461-1464, 2018 Mar 08.
[Is] ISSN:1948-7185
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:The concentration of solute molecules at the surface of a liquid is a factor in heterogeneous reactions, surface tension, and Marangoni-effect-driven surface flows. Increasingly, X-ray photoelectron spectroscopy (XPS) has enabled surface concentrations to be measured. In prior work, we employed statistical mechanics to derive expressions for surface tension as a function of solute activity in a binary solution. Here we use a Gibbs relation to derive concomitant expressions for surface concentration. Surface tension data from the literature for five alcohols are used to identify parameters in the surface tension equation. These parameters are then used in the surface concentration equation to predict surface concentrations. Comparison of these predictions to those measured with XPS shows a factor of three difference between measured and predicted surface concentrations. Potential reasons for the discrepancy are discussed, including lack of surface-bulk equilibrium in the measurements.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180308
[Lr] Last revision date:180308
[St] Status:Publisher
[do] DOI:10.1021/acs.jpclett.8b00332


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