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https://www.readbyqxmd.com/read/27923199/the-importance-of-vial-composition-in-hplc-analysis-an-unusual-case-of-phosphorous-pseudorotation
#1
Rebecca Arvary, Ian Mangion
Glass HPLC vials are ubiquitous in analytical laboratories and vendors have developed many varieties to meet the various needs of scientists. As such there may be multiple types of vials being used simultaneously in a single laboratory without much consideration as to which is best suited for analytical method development and validation. This study highlights the possibility of vial composition as a potential factor that impacts solution stability. Here we describe a case where the type of HPLC vial used results in an interesting phosphorous pseudorotation driven by the mild alkalinity of glass...
October 6, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/27922938/skeletal-muscle-mass-is-associated-with-higher-dietary-protein-intake-and-lower-body-fat-in-postmenopausal-women-a-cross-sectional-study
#2
Thaís R Silva, Poli M Spritzer
OBJECTIVE: We investigated the association between skeletal muscle mass and dietary protein intake, habitual physical activity, body composition, and metabolic variables. METHODS: One hundred three healthy postmenopausal women from southern Brazil (age 55.2 ± 4.9 y, body mass index 27.2 ± 4.6 kg/m) were enrolled. Bone mineral density, %body fat, %trunk fat mass, and appendicular lean mass were assessed by dual-energy x-ray absorptiometry, resting metabolic rate by indirect calorimetry, and habitual physical activity by pedometer...
December 5, 2016: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/27922810/impact-of-chronic-total-occlusion-revascularization-attempts-on-subsequent-clinical-outcomes
#3
Ahmad Jabbar, Georgios Christopoulos, Aris Karatasakis, Omar M Jeroudi, Georgios E Christakopoulos, Abdallah El Sabbagh, Barbara Danek, Judit Karacsonyi, Michele Roesle, Bavana V Rangan, Jerrold Grodin, Michael Luna, Shuaib Abdullah, Subhash Banerjee, Emmanouil S Brilakis
OBJECTIVES: We examined a contemporary, unselected cohort of patients with coronary chronic total occlusions (CTOs) to determine the impact of CTO revascularization on long-term outcomes. METHODS: We retrospectively assessed the impact of CTO revascularization on clinical outcomes of consecutive patients found to have a CTO during coronary angiography performed at our institution during 2011 and 2012. The primary endpoint was the incidence of a major adverse cardiac event (MACE, defined as a composite of death, myocardial infarction, stroke, and target-vessel revascularization [TVR])...
December 2016: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/27922809/impact-of-coronary-artery-disease-on-postoperative-outcomes-in-patients-undergoing-transcatheter-aortic-valve-replacement-tavr-is-preoperative-coronary-revascularization-necessary
#4
Dhaval Chauhan, Mohammad Thawabi, Nicky Haik, Bruce J Haik, Chunguang Chen, Marc Cohen, Mark Russo
BACKGROUND: There remains much controversy on impact of preoperative coronary artery disease (CAD) and necessity of preoperative coronary revascularization on postoperative outcomes in patients undergoing transcatheter aortic valve replacement (TAVR). METHODS: Data were collected retrospectively for 364 consecutive patients undergoing TAVR at Newark Beth Israel Medical Center, New Jersey, from May 15, 2012 to September 17, 2015. Preoperative CAD burden was calculated by three different measures of CAD: SYNTAX score, Duke Myocardial Jeopardy score (DMJS), and number of diseased coronary arteries...
December 2016: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/27922806/the-evolution-of-plaque-composition-in-ctos
#5
EDITORIAL
Lloyd W Klein, Divya Korpu, Ibett Colina
No abstract text is available yet for this article.
December 2016: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/27922752/abnormal-glucose-metabolism-and-high-energy-expenditure-in-idiopathic-pulmonary-arterial-hypertension
#6
Gustavo A Heresi, Steven K Malin, Jarrod W Barnes, Liping Tian, John P Kirwan, Raed A Dweik
RATIONALE: Insulin resistance has emerged as a potential mechanism related to the pathogenesis of idiopathic pulmonary arterial hypertension (IPAH). However, direct measurements of insulin and glucose metabolism have not been performed in IPAH patients to date. OBJECTIVES: To perform comprehensive metabolic phenotyping on humans with IPAH. METHODS: We assessed plasma insulin and glucose using an oral glucose tolerance test and estimated insulin resistance and beta-cell function in 14 IPAH patients and 14 controls matched for age, sex, blood pressure, and body mass index (BMI),...
December 6, 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27922732/dental-caries-and-associated-factors-in-twins-with-down-syndrome-a-case-report
#7
Maurício José Santos Moreira, Carolina Schwertner, Ana Paula Dall'Onder, Natália Mincato Klaus, Clarissa Cavalcanti Fatturi Parolo, Lina Naomi Hashizume
Down syndrome (DS) is the most common genetic disorder in humans, but its incidence in monozygotic twins is extremely rare. The aim of this study was to determine the factors associated with dental caries in a pair of monozygotic twin girls with DS, where one had caries experience and the other did not. Clinical examination, salivary Streptococcus mutans (S. mutans) levels and their genotypic diversity, the biochemical composition of the dental biofilm, the frequency of sucrose consumption, and toothbrushing habits were assessed from the twin girls...
December 6, 2016: Special Care in Dentistry
https://www.readbyqxmd.com/read/27922730/anchoring-nitrogen-doped-tio2-nanocrystals-on-nitrogen-doped-3d-graphene-frameworks-for-enhanced-lithium-storage
#8
Yan Yu, Xiaowu Liu, Zhenzhong Yang, Lin Gu
An advanced architecture design of nitrogen doped TiO2 anchored on nitrogen doped 3D graphene frameworks composites (denoted as N-TiO2/N-3D GFs) have been fabricated by a facile template process and further NH3 treatment. The 3D graphene framework allows the electrolyte penetrate into the inverse opal structure and possess high electronic conductivity. The intimate contact between the N-TiO2 and the graphene suppresses the growth and aggregation of TiO2 nanoparticles during heating process, leading to decreased Li+ diffusion length...
December 6, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27922663/norspermidine-changes-the-basic-structure-of-s-%C3%A2-mutans-biofilm
#9
Meizhen Ou, Junqi Ling
The factors regulating the assembly of the three-dimensional structure of Streptococcus mutans biofilms remain obscure. Polyamines are essential in biofilm formation of certain bacteria. Norspermidine, an unusual polyamine, has been a controversial polyamine that can lead to biofilm disassembly. However, the role of norspermidine in S. mutans biofilms remains unknown. Therefore, the present study investigated the impact of norspermidine on S. mutans biofilms. The different architectures of the biofilms in norspermidine and control groups indicated that the basic units, bacteria‑exopolysaccharide units (BEUs), represent the exopolysaccharide (EPS) and bacterial assembly pattern in S...
December 5, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27922593/corrigendum-a-database-of-marine-phytoplankton-abundance-biomass-and-species-composition-in-australian-waters
#10
Claire H Davies, Alex Coughlan, Gustaaf Hallegraeff, Penelope Ajani, Linda Armbrecht, Natalia Atkins, Prudence Bonham, Steve Brett, Richard Brinkman, Michele Burford, Lesley Clementson, Peter Coad, Frank Coman, Diana Davies, Jocelyn Dela-Cruz, Michelle Devlin, Steven Edgar, Ruth Eriksen, Miles Furnas, Christel Hassler, David Hill, Michael Holmes, Tim Ingleton, Ian Jameson, Sophie C Leterme, Christian Lønborg, James McLaughlin, Felicity McEnnulty, A David McKinnon, Margaret Miller, Shauna Murray, Sasi Nayar, Renee Patten, Tim Pritchard, Roger Proctor, Diane Purcell-Meyerink, Eric Raes, David Rissik, Jason Ruszczyk, Anita Slotwinski, Kerrie M Swadling, Katherine Tattersall, Peter Thompson, Paul Thomson, Mark Tonks, Thomas W Trull, Julian Uribe-Palomino, Anya M Waite, Rouna Yauwenas, Anthony Zammit, Anthony J Richardson
No abstract text is available yet for this article.
December 6, 2016: Scientific Data
https://www.readbyqxmd.com/read/27922565/a-perspective-on-brain-gut-communication-the-american-gastroenterology-association-and-american-psychosomatic-society-joint-symposium-on-brain-gut-interactions-and-the-intestinal-microenvironment
#11
Olga C Aroniadis, Douglas A Drossman, Magnus Simren
BACKGROUND: Alterations in brain-gut communication and the intestinal microenvironment have been implicated in a variety of medical and neuropsychiatric diseases. Three central areas require basic and clinical research: (1) how the intestinal microenvironment interacts with the host immune system, central nervous system and enteric nervous system; (2) the role of the intestinal microenvironment in the pathogenesis of medical and neuropsychiatric disease; (3) the effects of diet, prebiotics, probiotics and fecal microbiota transplantation on the intestinal microenvironment and the treatment of disease...
December 2, 2016: Psychosomatic Medicine
https://www.readbyqxmd.com/read/27922530/re-chemical-composition-of-fine-particulate-matter-and-life-expectancy-in-95-us-counties
#12
Frederick W Lipfert
No abstract text is available yet for this article.
December 1, 2016: Epidemiology
https://www.readbyqxmd.com/read/27922272/diversity-of-indoor-fungi-as-revealed-by-dna-metabarcoding
#13
Helena Korpelainen, Maria Pietiläinen
In the present study, we conducted DNA metabarcoding (the nuclear ITS2 region) for indoor fungal samples originating from two nursery schools with a suspected mould problem (sampling before and after renovation), from two university buildings, and from an old farmhouse. Good-quality sequences were obtained, and the results showed that DNA metabarcoding provides high resolution in fungal identification. The pooled proportions of sequences representing filamentous ascomycetes, filamentous basidiomycetes, yeasts, and other fungi equalled 62...
September 14, 2016: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/27922240/associations-of-lean-and-fat-mass-measures-with-whole-body-bone-mineral-content-and-bone-mineral-density-in-female-adolescent-weightlifters-and-swimmers
#14
Şükran Nazan Koşar
Body composition and sport participation have been associated with bone mass. The purpose of this study was to determine the associations of lean and fat mass measures with whole body bone mineral content (BMC) and bone mineral density (BMD) in female adolescent weightlifters, swimmers and non-athletic counterparts. This study included a total of 25 female adolescents (mean age: 15.3±1.1 years). Body composition and bone mass were measured by dual-energy X-ray absorptiometry. In most of the studied variables weight lifters had higher values compared to swimmers and non-athletes (p < 0...
2016: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/27922209/unconventional-pretreatment-of-lignocellulose-with-low-temperature-plasma
#15
Jens Vanneste, Thijs Ennaert, Annick Vanhulsel, Bert F Sels
Lignocellulose represents a potential supply of sustainable feedstock for the production of biofuels and chemicals. There is, however, an important cost and efficiency challenge associated with the conversion of such lignocellulosics. Since its structure is complex and not prone to undergo chemical reactions very easily, chemical and mechanical pretreatments are usually necessary in order to be able to refine them into the compositional building blocks (carbohydrates and lignin), from which value-added platform molecules such as glucose, ethylene glycol, 5-hydroxymethylfurfural, levulinic acid, etc...
December 6, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27922204/encapsulation-of-bimetallic-metal-nanoparticles-into-robust-zr-based-metal-organic-frameworks-evaluation-of-the-catalytic-potential-for-size-selective-hydrogenation
#16
Christoph Rösler, Stefano Dissegna, Victor Lopez Rechac, Max Kauer, Penghu Guo, Stuart Turner, Kevin Ollegott, Hirokazu Kobayashi, Tomokazu Yamamoto, Daniel Peeters, Yuemin Wang, Syo Matsumura, Gustaaf Van Tendeloo, Hiroshi Kitagawa, Martin Muhler, Francesc X Llabrés I Xamena, Roland A Fischer
The realization of metal NPs with bimetallic character and distinct composition for specific catalytic applications is an intensively studied field. Due to the synergy between metals, most of the bimetallic particles exhibit unique properties, only hardly provided by the individual monometallic counterparts. However, as small sized NPs possess high surface energy, agglomeration during catalytic reactions is favored. Sufficient stabilization can be achieved by confinement of NPs in porous support materials. In this sense, especially MOFs gained a lot of attention during the last years, however, encapsulation of bimetallic species remains challenging...
December 6, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27922124/convex-analysis-of-mixtures-for-separating-non-negative-well-grounded-sources
#17
Yitan Zhu, Niya Wang, David J Miller, Yue Wang
Blind Source Separation (BSS) is a powerful tool for analyzing composite data patterns in many areas, such as computational biology. We introduce a novel BSS method, Convex Analysis of Mixtures (CAM), for separating non-negative well-grounded sources, which learns the mixing matrix by identifying the lateral edges of the convex data scatter plot. We propose and prove a sufficient and necessary condition for identifying the mixing matrix through edge detection in the noise-free case, which enables CAM to identify the mixing matrix not only in the exact-determined and over-determined scenarios, but also in the under-determined scenario...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922096/enantiomer-signature-and-carbon-isotope-evidence-for-the-migration-and-transformation-of-ddts-in-arable-soils-across-china
#18
Lili Niu, Chao Xu, Siyu Zhu, Huiming Bao, Yang Xu, Hongyi Li, Zhijian Zhang, Xichang Zhang, Jiguo Qiu, Weiping Liu
Due to the adverse impact of DDTs on ecosystems and humans, a full fate assessment deems a comprehensive study on their occurrence in soils over a large region. Through a sampling campaign across China, we measured the concentrations, enantiomeric fractions (EFs), compound-specific carbon isotope composition of DDT and its metabolites, and the microbial community in related arable soils. The geographically total DDT concentrations are higher in eastern than western China. The EFs and δ(13)C of o,p'-DDT in soils from western China show smaller deviations from those of racemic/standard compound, indicating the DDT residues there mainly result from atmospheric transport...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922086/photoelectrochemical-detection-of-alpha-fetoprotein-based-on-zno-inverse-opals-structure-electrodes-modified-by-ag2s-nanoparticles
#19
Yandong Jiang, Dali Liu, Yudan Yang, Ru Xu, Tianxiang Zhang, Kuang Sheng, Hongwei Song
In this work, a new photoelectrochemical biosensor based on Ag2S nanoparticles (NPs) modified macroporous ZnO inverse opals structure (IOs) was developed for sensitive and rapid detection of alpha fetal protein (AFP). Small size and uniformly dispersed Ag2S NPs were prepared using the Successive Ionic Layer Adsorption And Reaction (SILAR) method, which were adsorbed on ZnO IOs surface and frame work as matrix for immobilization of AFP. The composite structure of ZnO/Ag2S expanded the scope of light absorption to long wavelength, which can make full use of the light energy...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922080/warming-trends-and-bleaching-stress-of-the-world-s-coral-reefs-1985-2012
#20
Scott F Heron, Jeffrey A Maynard, Ruben van Hooidonk, C Mark Eakin
Coral reefs across the world's oceans are in the midst of the longest bleaching event on record (from 2014 to at least 2016). As many of the world's reefs are remote, there is limited information on how past thermal conditions have influenced reef composition and current stress responses. Using satellite temperature data for 1985-2012, the analysis we present is the first to quantify, for global reef locations, spatial variations in warming trends, thermal stress events and temperature variability at reef-scale (~4 km)...
December 6, 2016: Scientific Reports
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