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https://www.readbyqxmd.com/read/27926973/neurologic-injury-in-acidemic-term-infants
#1
Alison G Cahill, Amit M Mathur, Christopher D Smyser, Robert C Mckinstry, Kimberly A Roehl, Julia D López, Terrie E Inder, George A Macones
Objective To determine whether arterial umbilical cord gas (aUCG) pH, in anatomically normal-term infants, could select infants at risk for brain injury identified on magnetic resonance imaging (MRI). Study Design We performed a nested case-control within a prospective cohort of 8,580 women. Cases, with an aUCG pH < 7.10, were temporally, age, and sex matched to controls with an aUCG pH ≥ 7.20. Bi- and multivariable analyses compared the presence and severity of brain injury. Secondary analyses estimated whether elevated arterial base excess or lactate were associated with brain injury...
December 7, 2016: American Journal of Perinatology
https://www.readbyqxmd.com/read/27926586/hypercapnic-conditions-after-experimental-blunt-chest-trauma-increase-efferocytosis-of-alveolar-macrophages-and-reduce-local-inflammation
#2
Annette Palmer, Michael S J Eichner, Anne Rittlinger, Daniel H Seitz, Florian Gebhard, Markus S Huber-Lang, Ulrike Niesler
Blunt chest trauma induces severe local and systemic inflammatory alterations and an accumulation of apoptotic polymorphonuclear granulocytes (aPMN) in the lungs, frequently followed by bacterial infection. Alveolar macrophages (AM) represent one of the main actors for their clearance. However, little is known regarding regulatory and influencing factors of AM efferocytic and phagocytic activities. In this context, we investigated the influence of impaired gas exchange on AM activity.Male rats underwent blunt chest trauma or sham procedure and aPMN or E...
December 6, 2016: Shock
https://www.readbyqxmd.com/read/27926460/association-of-serum-n-3-polyunsaturated-fatty-acids-with-psychological-distress-in-the-second-and-third-trimesters-of-pregnancy-adjunct-study-of-japan-environment-and-children-s-study
#3
Kei Hamazaki, Akiko Harauma, Satoru Tanabe, Miho Namai, Toru Moriguchi, Hidekuni Inadera
The results of several epidemiological studies and clinical trials investigating the effects of n-3 polyunsaturated fatty acids (PUFAs) on antenatal and postnatal depression remain controversial. In a previous case-control study of early pregnancy in Japan, we found an inverse association between eicosapentaenoic acid and risk of psychological distress after adjusting for possible confounders. Here, in a 1:2 matched case-control study, we further investigated the possible relationship between serum n-3 PUFAs and risk of psychological distress in the second and third trimesters of pregnancy...
November 2016: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/27926458/changes-in-relative-and-absolute-concentrations-of-plasma-phospholipid-fatty-acids-observed-in-a-randomized-trial-of-omega-3-fatty-acids-supplementation-in-uganda
#4
Xiaoling Song, Pho Diep, Jeannette M Schenk, Corey Casper, Jackson Orem, Zeina Makhoul, Johanna W Lampe, Marian L Neuhouser
Expressing circulating phospholipid fatty acids (PLFAs) in relative concentrations has some limitations: the total of all fatty acids are summed to 100%; therefore, the values of individual fatty acid are not independent. In this study we examined if both relative and absolute metrics could effectively measure changes in circulating PLFA concentrations in an intervention trial. 66 HIV and HHV8 infected patients in Uganda were randomized to take 3g/d of either long-chain omega-3 fatty acids (1856mg EPA and 1232mg DHA) or high-oleic safflower oil in a 12-week double-blind trial...
November 2016: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/27926429/biologically-produced-methane-as-a-renewable-energy-source
#5
D E Holmes, J A Smith
Methanogens are a unique group of strictly anaerobic archaea that are more metabolically diverse than previously thought. Traditionally, it was thought that methanogens could only generate methane by coupling the oxidation of products formed by fermentative bacteria with the reduction of CO2. However, it has recently been observed that many methanogens can also use electrons extruded from metal-respiring bacteria, biocathodes, or insoluble electron shuttles as energy sources. Methanogens are found in both human-made and natural environments and are responsible for the production of ∼71% of the global atmospheric methane...
2016: Advances in Applied Microbiology
https://www.readbyqxmd.com/read/27925846/characteristics-sources-and-cytotoxicity-of-atmospheric-polycyclic-aromatic-hydrocarbons-in-urban-roadside-areas-of-hangzhou-china
#6
Hongzhen Bai, Hongjian Zhang
The primary objective of this study is to understand the profiles, sources and cytotoxic effects of atmospheric polycyclic aromatic hydrocarbons (PAHs), which are closely related to urban air contamination and public health, in urban roadside environments. On-road sampling campaigns were conducted from 2014 to 2015 at three urban road sites in Hangzhou, China. Sixteen gaseous and particulate matter (PM) 2.5-bound PAHs were identified and quantified using gas chromatography-mass spectrometry (GC-MS). The total PAH concentrations at the three sites ranged from 750 to1142 ng/m(3) and 1050 to 1483 ng/m(3) in summer and winter, respectively...
December 7, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27925754/development-of-improved-radiation-drive-environment-for-high-foot-implosions-at-the-national-ignition-facility
#7
D E Hinkel, L F Berzak Hopkins, T Ma, J E Ralph, F Albert, L R Benedetti, P M Celliers, T Döppner, C S Goyon, N Izumi, L C Jarrott, S F Khan, J L Kline, A L Kritcher, G A Kyrala, S R Nagel, A E Pak, P Patel, M D Rosen, J R Rygg, M B Schneider, D P Turnbull, C B Yeamans, D A Callahan, O A Hurricane
Analyses of high foot implosions show that performance is limited by the radiation drive environment, i.e., the hohlraum. Reported here are significant improvements in the radiation environment, which result in an enhancement in implosion performance. Using a longer, larger case-to-capsule ratio hohlraum at lower gas fill density improves the symmetry control of a high foot implosion. Moreover, for the first time, these hohlraums produce reduced levels of hot electrons, generated by laser-plasma interactions, which are at levels comparable to near-vacuum hohlraums, and well within specifications...
November 25, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27925749/persistent-skyrmion-lattice-of-noninteracting-electrons-with-spin-orbit-coupling
#8
Jiyong Fu, Poliana H Penteado, Marco O Hachiya, Daniel Loss, J Carlos Egues
A persistent spin helix (PSH) is a robust helical spin-density pattern arising in disordered 2D electron gases with Rashba α and Dresselhaus β spin-orbit (SO) tuned couplings, i.e., α=±β. Here, we investigate the emergence of a persistent Skyrmion lattice (PSL) resulting from the coherent superposition of PSHs along orthogonal directions-crossed PSHs-in wells with two occupied subbands ν=1, 2. For realistic GaAs wells, we show that the Rashba α_{ν} and Dresselhaus β_{ν} couplings can be simultaneously tuned to equal strengths but opposite signs, e...
November 25, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27925718/momentum-distribution-in-the-unitary-bose-gas-from-first-principles
#9
Tommaso Comparin, Werner Krauth
We consider a realistic bosonic N-particle model with unitary interactions relevant for Efimov physics. Using quantum Monte Carlo methods, we find that the critical temperature for Bose-Einstein condensation is decreased with respect to the ideal Bose gas. We also determine the full momentum distribution of the gas, including its universal asymptotic behavior, and compare this crucial observable to recent experimental data. Similar to the experiments with different atomic species, differentiated solely by a three-body length scale, our model only depends on a single parameter...
November 25, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27925436/the-chemical-route-to-a-co2-neutral-world
#10
Johan Martens, Annemie Bogaerts, Norbert De Kimpe, Pierre Jacobs, Guy Marin, Korneel Rabaey, Mark Saeys, Sebastian Verhelst
The excessive CO2 emissions in the atmosphere from anthropogenic activity can be divided into point sources and diffuse sources. The capture of CO2 from flue gases of large industrial installations and its conversion to fuels and chemicals with fast catalytic processes seems technically possible. Some emerging technologies are already being demonstrated on an industrial scale. Others are still being tested on a laboratory or pilot scale. These emerging technologies can be implemented in a time-window ranging from 5 to 20 years...
December 7, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27925402/two-new-oxygen-containing-biomarkers-isolated-from-the-chinese-maoming-oil-shale-by-silica-gel-column-chromatography-and-preparative-gas-chromatography
#11
Xiangyun Zhang, Hong Lu, Jing Liao, Caiming Tang, Guoying Sheng, Ping'an Peng
Two biomarkers, 5,9-dimethyl-6-isopropyl-2-decanone (1) and 4,9,11-trimethyl-6-isopropyl-2-dodecanone (2), were isolated from Chinese Maoming Oil Shale by silica gel column chromatography and preparative gas chromatography. Their structures were elucidated by using spectroscopic techniques. This article is protected by copyright. All rights reserved.
December 7, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27925360/hierarchical-mesoporous-sno2-nanosheets-on-carbon-cloth-a-robust-and-flexible-electrocatalyst-for-co2-reduction-with-high-efficiency-and-selectivity
#12
Fengwang Li, Lu Chen, Gregory P Knowles, Douglas R MacFarlane, Jie Zhang
Electrochemical reduction of CO2 into liquid fuels is a promising approach to achieve a carbon-neutral energy cycle. However, conventional electrocatalysts usually suffer from low energy efficiency and poor selectivity and stability. A 3D hierarchical structure composed of mesoporous SnO2 nanosheets on carbon cloth is proposed to efficiently and selectively electroreduce CO2 to formate in aqueous media. The electrode is fabricated by a facile combination of hydrothermal reaction and calcination. It exhibits an unprecedented partial current density of about 45 mA cm(-2) at a moderate overpotential (0...
December 7, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27925315/social-preferences-for-the-design-of-biodiversity-offsets-for-shorebirds-in-australia
#13
Abbie A Rogers, Michael P Burton
Understanding the social acceptability of biodiversity offsets is important in order to properly design offset policy. This study used a discrete choice experiment to quantify preferences of the Australian people for a migratory shorebird offset, in the context of an oil and gas development. We used both current and prospective offset policy characteristics, with a view to informing future policy design of the social dimensions related to offset acceptability. We found that the practice of offsetting was accepted by the community as a means to allow economic development...
December 7, 2016: Conservation Biology: the Journal of the Society for Conservation Biology
https://www.readbyqxmd.com/read/27925291/herbivore-perception-decreases-photosynthetic-carbon-assimilation-and-reduces-stomatal-conductance-by-engaging-12-oxo-phytodienoic-acid-mitogen-activated-protein-kinase-4-and-cytokinin-perception
#14
Ivan D Meza-Canales, Stefan Meldau, Jorge A Zavala, Ian T Baldwin
Herbivory-induced changes in photosynthesis have been documented in many plant species, however the complexity of photosynthetic regulation and analysis has thwarted progress in understanding the mechanism involved, particularly those elicited by herbivore-specific elicitors. Here we analyzed the early photosynthetic gas-exchange responses in Nicotiana attenuata plants after wounding and elicitation with Manduca sexta oral-secretions, and the pathways regulating these responses. Elicitation with M. sexta oral-secretions rapidly decreased photosynthetic carbon-assimilation (AC ) in treated and systemic (untreated, vascularly connected) leaves, which were associated with changes in stomatal conductance, rather than with changes in Rubisco activity and RuBP-turnover...
December 7, 2016: Plant, Cell & Environment
https://www.readbyqxmd.com/read/27925257/volatile-compounds-produced-by-lactobacillus-paracasei-during-oat-fermentation
#15
Sang Mi Lee, Jieun Oh, Byung-Serk Hurh, Gwi-Hwa Jeong, Young-Keum Shin, Young-Suk Kim
This study investigated the profiles of volatile compounds produced by Lactobacillus paracasei during oat fermentation using gas chromatography-mass spectrometry coupled with headspace solid-phase microextraction method. A total of 60 compounds, including acids, alcohols, aldehydes, esters, furan derivatives, hydrocarbons, ketones, sulfur-containing compounds, terpenes, and other compounds, were identified in fermented oat. Lipid oxidation products such as 2-pentylfuran, 1-octen-3-ol, hexanal, and nonanal were found to be the main contributors to oat samples fermented by L...
December 2016: Journal of Food Science
https://www.readbyqxmd.com/read/27925254/relative-tissue-distribution-and-excretion-studies-of-gastrodin-and-parishin-from-powder-and-extract-of-gastrodiae-rhizoma-in-rat-by-uhplc-esi-ms-ms
#16
Zhengmeng Jiang, Xiuyan Zheng, Xiaojian Gong, Chao Zhao, Xin Zhou, Yang Zhao, Yanfang Yan
New research indicated that Gastrodiae rhizome (GR) has potential anti-diabetic and anti-asthmatic effects in mice models. On the basis of our previously study of the relative bioavailability of gastrodin (GAS) and parishin (PA) from extract and powder of GR., we make further research on the tissue distribution and excretion studies of the two analytes. A reliable bioanalytical method for the quantification of GAS and PA in rat tissues and excretion is required. Chromatographic separation was carried out on a gradient mobile phase of acetonitrile-water with 0...
December 7, 2016: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/27925246/analytical-method-for-urinary-metabolites-as-biomarkers-for-monitoring-exposure-to-phthalates-by-gas-chromatography-mass-spectrometry
#17
Toshiaki Yoshida
Phthalates, widely being used as plasticizers, have been detected from the indoor air of residences, but there have been few reports on methods of analyzing urinary metabolites as biomarkers to monitor exposure to di-n-pentyl phthalate or di-n-hexyl phthalate. Presented here is a cost-effective and sensitive analytical method for the determination of urinary metabolites of phthalates containing these two compounds. Nine urinary phthalate metabolites were enzymatically hydrolyzed and extracted with toluene: monomethyl phthalate, monoethyl phthalate, monoisobutyl phthalate, mono-n-butyl phthalate, mono-n-pentyl phthalate, mono-n-hexyl phthalate, monocyclohexyl phthalate, monobenzyl phthalate and mono(2-ethyl-5-carboxypentyl) phthalate...
December 7, 2016: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/27925243/hemodiafiltration-a-technique-for-physiological-correction-of-priming-solution-in-pediatric-cardiac-surgery-an-in-vitro-study
#18
Pankaj Garg, Arvind Kumar Bishnoi, Kartik Patel, Vivek Wadhawa, Jigar Surti, Atul Solanki, Komal Shah, Sanjay Patel
Pediatric cardiopulmonary bypass (CPB) circuit invariably requires priming with packed red blood cells (PRBCs). Metabolic composition of stored PRBCs is unphysiological and becomes worse with increasing duration of storage. It is recommended to correct these abnormalities before initiation of CPB. We tested the hypothesis that hemodiafiltration of the prime with 0.45% saline is sufficient for reducing the metabolic load and reaching a physiologic state. In an in vitro study, 100 mL of blood each from 45 units of PRBCs stored for 3-20 days were used for priming the 45 neonatal CPB circuits...
December 7, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27925231/experimental-approach-to-visualize-flow-in-a-stacked-hollow-fiber-bundle-of-an-artificial-lung-with-particle-image-velocimetry
#19
Andreas Kaesler, Peter C Schlanstein, Felix Hesselmann, Martin Büsen, Michael Klaas, Dorothee Roggenkamp, Thomas Schmitz-Rode, Ulrich Steinseifer, Jutta Arens
Flow distribution is key in artificial lungs, as it directly influences gas exchange performance as well as clot forming and blood damaging potential. The current state of computational fluid dynamics (CFD) in artificial lungs can only give insight on a macroscopic level due to model simplification applied to the fiber bundle. Based on our recent work on wound fiber bundles, we applied particle image velocimetry (PIV) to the model of an artificial lung prototype intended for neonatal use to visualize flow distribution in a stacked fiber bundle configuration to (i) evaluate the feasibility of PIV for artificial lungs, (ii) validate CFD in the fiber bundle of artificial lungs, and (iii) give a suggestion how to incorporate microscopic aspects into mainly macroscopic CFD studies...
December 7, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27925226/leaf-gas-films-contribute-to-rice-oryza-sativa-submergence-tolerance-during-saline-floods
#20
Max Herzog, Dennis Konnerup, Ole Pedersen, Anders Winkel, Timothy David Colmer
Floods and salinization of agricultural land adversely impact global rice production. We investigated whether gas films on leaves of submerged rice delay salt entry during saline submergence. Two-week-old plants with leaf gas films (+GF) or with gas films experimentally removed (-GF) were submerged in artificial floodwater with 0 or 50 mM NaCl for up to 16 d. Gas films were present > 9 d on + GF plants after which gas films were diminished. Tissue ion analysis (Na(+) , Cl(-) and K(+) ) showed that gas films caused some delay of Na(+) entry, as leaf Na(+) concentration was 36-42% higher in -GF leaves than + GF leaves on d 1-5...
December 7, 2016: Plant, Cell & Environment
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