keyword
MENU ▼
Read by QxMD icon Read
search

mass trace

keyword
https://www.readbyqxmd.com/read/28223090/roux-en-y-gastric-bypass-for-the-treatment-of-severe-complications-after-omega-loop-gastric-bypass
#1
Tigran Poghosyan, Clementine Caille, David Moszkowicz, Mouna Hanachi, Claire Carette, Jean-Luc Bouillot
BACKGROUND: Omega-loop gastric bypass (OLGB) may be associated with severe complications, including anastomotic leak, refractory ulcer or stenosis, undernutrition, and disabling digestive disorders (chronic diarrhea, steatorrhea, bile reflux, and vomiting). OLGB conversion to Roux-en-Y gastric bypass (RYGB) was suggested to treat these complications. OBJECTIVES: To evaluate the efficacy and risk of severe complications after OLGB conversion to RYGB. SETTING: University hospital...
December 9, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28220282/serum-trace-elements-are-associated-with-hemostasis-lipid-spectrum-and-inflammatory-markers-in-men-suffering-from-acute-ischemic-stroke
#2
Anatoly V Skalny, Lydmila L Klimenko, Aliya A Turna, Maria N Budanova, Ivan S Baskakov, Marina S Savostina, Aksana N Mazilina, Anatoly I Deyev, Margarita G Skalnaya, Alexey A Tinkov
The primary objective of the study is investigation of the association between trace elements status and hemostasis, lipid spectrum and inflammatory markers in acute ischemic stroke (AIS). A total of 30 men suffering from AIS and 30 healthy controls were involved in the current survey. Blood count, serum lipid spectrum, complement components C4 and C3a, vascular endothelial growth factor (VEGF), S100B protein, NR2 antibodies (NR2Ab), and total antioxidant status (TAS), as well as plasma fibrinogen, and D-dimer levels and activated partial thromboplastin time (APTT) were assessed...
February 20, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28219956/mineral-status-in-canine-medial-coronoid-process-disease-a-cohort-study-using-analysis-of-hair-by-mass-spectrometry
#3
M Davies, J West, C Williams, D S Gardner
In several species, developmental skeletal diseases involving abnormal endochondral ossification have been associated with imbalanced mineral intake. Hair analysis reflects long-term mineral status. To determine the mineral content of hair from dogs with or without medial coronoid process disease (MCPD). Dogs with MCPD have a different profile of minerals known to influence metalloenzymes involved in endochondral ossification. After cleansing, chelation and acid digestion of hair samples (n=79 in total: control dogs, n=70 v MCPD, n=9), mineral profile (7 major and 25 trace elements) was determined by inductively coupled plasma-mass spectrometry...
February 20, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28217859/aminosilanized-magnetic-carbon-microspheres-for-the-magnetic-solid-phase-extraction-of-bisphenol-a-bisphenol-af-and-tetrabromobisphenol-a-from-environmental-water-samples
#4
Sheng-Xiang Gong, Xiao-Li Wang, Wei Liu, Ming-Lin Wang, Xia Wang, Zheng-Wu Wang, Ru-Song Zhao
Aminosilanized magnetic carbon microspheres as a novel adsorbent were designed and fabricated. And the adsorbent was used for the magnetic solid-phase extraction of bisphenols at trace levels from environmental water samples before liquid chromatography with tandem mass spectrometry analysis. The structure, surface and magnetic behavior of the as-prepared aminosilanized magnetic carbon microspheres were characterized by elemental analysis, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, powder X-ray diffraction, and vibrating sample magnetometry...
February 20, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28217108/chemotaxis-without-conventional-two-component-system-based-on-cell-polarity-and-aerobic-conditions-in-helicity-switching-swimming-of-spiroplasma-eriocheiris
#5
Peng Liu, Huajun Zheng, Qingguo Meng, Natsuho Terahara, Wei Gu, Shengyue Wang, Guoping Zhao, Daisuke Nakane, Wen Wang, Makoto Miyata
Spiroplasma eriocheiris is a pathogen that causes mass mortality in Chinese mitten crab, Eriocheir sinensis. S. eriocheiris causes tremor disease and infects almost all of the artificial breeding crustaceans, resulting in disastrous effects on the aquaculture economy in China. S. eriocheiris is a wall-less helical bacterium, measuring 2.0 to 10.0 μm long, and can swim up to 5 μm per second in a viscous medium without flagella by switching the cell helicity at a kink traveling from the front to the tail. In this study, we showed that S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28216902/feeble-antipyretic-analgesic-and-anti-inflammatory-activities-were-found-with-regular-dose-4-o-%C3%AE-d-glucosyl-5-o-methylvisamminol-one-of-the-conventional-marker-compounds-for-quality-evaluation-of-radix-saposhnikoviae
#6
Jing-Ming Yang, Hua Jiang, Hong-Liang Dai, Zi-Wei Wang, Gui-Zhi Jia, Xiang-Cai Meng
INTRODUCTION: 4'-O-β-D-glucosyl-5-O-methylvisamminol (GML) is a conventional marker compound for quality control of Radix Saposhnikoviae. Despite that, neither pharmacodynamic or pharmacokinetic information is available with regard to GML. As such, the aim of thisstudy was to assess the conventional evaluation indices for the quality of Radix Saposhnikoviae. MATERIALS AND METHODS: Pyretic animal model, hot plate test, and ear edema model were established to evaluate and compare the antipyretic, analgesic, and anti-inflammatory effect of the chromone derivativescimifugin, prime-O-glucosylcimifugin (PGCN), and GML in Radix Saposhnikoviae...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28214715/metal-bioaccumulation-and-detoxification-processes-in-cephalopods-a-review
#7
REVIEW
Virginie Penicaud, Thomas Lacoue-Labarthe, Paco Bustamante
In recent decades, cephalopods have been shown to have very high capacities to accumulate most trace elements, regardless of whether they are essential (e.g., Cu and Zn) or non-essential (e.g., Ag and Cd). Among the different pathways of exposure to trace elements, the trophic pathway appears to be the major route of assimilation for numerous metals, including Cd, Co, Hg and Zn. Once assimilated, trace elements are distributed in the organism, accumulating in storage organs. The digestive gland is the main organ in which many trace elements accumulate, whichever of the exposure pathway...
February 16, 2017: Environmental Research
https://www.readbyqxmd.com/read/28213143/selective-detection-of-cu-2-and-co-2-in-aqueous-media-asymmetric-chemosensors-crystal-structure-and-spectroscopic-studies
#8
Samira Gholizadeh Dogaheh, Hamid Khanmohammadi, E Carolina Sañudo
Two new azo-azomethine receptors, H2L(1) and H2L(2), containing hydrazine, naphthalene and different electron withdrawing groups, Cl and NO2, have been designed and synthesized for qualitative and quantitative detection of Cu(2+) and Co(2+) in aqueous media. The crystal structure of H2L(1)is reported. The H2L(1)was used as a chemosensor for selective detection of trace amount of Cu(2+) in aqueous media. H2L(2) was also applied to naked-eye distinction of Cu(2+) and Co(2+) from other transition metal ions in aqueous media...
February 8, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28211670/facile-synthesis-of-unique-hexagonal-nanoplates-of-zn-co-hydroxy-sulfate-for-efficient-electrocatalytic-oxygen-evolution-reaction
#9
Soumen Dutta, Chaiti Ray, Yuichi Negishi, Tarasankar Pal
Cost-effective, highly active water oxidation catalysts are becoming increasingly demanding in the field of energy conversion and storage. Herein, simple modified hydrothermally (MHT) synthesized zinc and cobalt based hydroxyl double salt i.e., Zn4-xCoxSO4(OH)6• 0.5 H2O (ZCS) has been exfoliated for the first time as an efficient electrocatalyst for oxygen evolution reaction (OER) in alkaline medium. Morphology investigation suggests the evolution of unique hexagonal nanoplates of ZCS material. As OER catalyst, it requires only 370 and 450 mV overpotential to achieve 10 and 100 mA cm-2 current density respectively...
February 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28211138/nocturnal-autonomic-nervous-system-activity-and-morning-proinflammatory-cytokines-in-young-adult-african-americans
#10
Kimberly A Bell, Ihori Kobayashi, Yuanxiu Chen, Thomas A Mellman
Compromised sleep and increased sympathetic nervous system (SNS) activity are implicated in the pathogenesis of, and disparities in, cardiovascular disease. Parasympathetic dominance during sleep may be important for cardiovascular health. Sleep and autonomic balance influence immune activity, which impacts atherogenesis. We evaluated relationships between autonomic balance during sleep and morning levels of the immune activating cytokines, C-reactive protein (CRP) and interleukin (IL)-6. Ninety-four (59 female) young adult African Americans without medical conditions and substance use disorders spent 2 consecutive nights in a clinical research unit for sleep recordings and blood drawing on awakening...
February 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28210756/high-precision-zinc-stable-isotope-measurement-of-certified-biological-reference-materials-using-the-double-spike-technique-and-multiple-collector-icp-ms
#11
Rebekah E T Moore, Fiona Larner, Barry J Coles, Mark Rehkämper
Biological reference materials with well-characterised stable isotope compositions are lacking in the field of 'isotope biochemistry', which seeks to understand bodily processes that rely on essential metals by determining metal stable isotope ratios. Here, we present Zn stable isotope data for six biological reference materials with certified trace metal concentrations: fish muscle, bovine muscle, pig kidney, human hair, human blood serum and human urine. Replicate analyses of multiple aliquots of each material achieved reproducibilities (2sd) of 0...
February 16, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28207908/isolation-and-determination-of-ivermectin-in-post-mortem-and-in-vivo-tissues-of-dung-beetles-using-a-continuous-solid-phase-extraction-method-followed-by-lc-esi-ms-ms
#12
Antonio J Ortiz, Vieyle Cortez, Abdelmonaim Azzouz, José R Verdú
A new analytical method based on solvent extraction, followed by continuous solid-phase extraction (SPE) clean-up using a polymeric sorbent, was demonstrated to be applicable for the detection of ivermectin in complex biological matrices of dung beetles (hemolymph, excreta or dry tissues) using liquid chromatography combined with positive electrospray ionization tandem mass spectrometry (LC/ESI+-MS/MS). Using a signal-to-noise ratio of 3:1, the limit of detection (LOD) in the insect matrices at trace levels was 0...
2017: PloS One
https://www.readbyqxmd.com/read/28204887/determination-of-monoamine-neurotransmitters-in-zebrafish-danio-rerio-by-gas-chromatography-coupled-to-mass-spectrometry-with-a-two-step-derivatization
#13
Alvaro Aragon, Jessica Legradi, Ana Ballesteros-Gómez, Juliette Legler, Martin van Velzen, Jacob de Boer, Pim Leonards
A sensitive analytical method for the determination of monoamine neurotransmitters (MNTs) in zebrafish larvae was developed using gas chromatography coupled to mass spectrometry. Six MNTs were selected as target compounds for neurotoxicity testing. MNTs underwent a two-step derivatization with hexamethyldisilazane (HDMS) for O-silylation followed by N-methyl-bis-heptafluorobutyramide (MBHFBA) for N-perfluoroacylation. Derivatization conditions were optimized by an experimental design approach. Method validation showed linear calibration curves (r (2) > 0...
February 15, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28199065/rapid-characterization-of-trace-aflatoxin-b1-on-groundnuts-wheat-and-maize-by-dispersive-liquid-liquid-microextraction-followed-by-direct-electrospray-probe-tandem-mass-spectrometry
#14
Thiphol Satarpai, Atitaya Siripinyanond, Hung Su, Jentaie Shiea
RATIONALE: Aflatoxins are poisonous and cancer-related chemical compounds commonly existed in crops and plants. Aflatoxin B1 is the most toxic compound among aflatoxins and has been classified as Group 1 carcinogenic to human, especially on liver cancer. Herein, an ambient mass spectrometric method was developed for rapid characterization of trace aflatoxin B1 on peanuts. METHODS: Direct electrospray probe tandem mass spectrometry was used to detect aflatoxin B1 on peanuts...
February 15, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28198615/antibacterial-activities-of-graphene-oxide-molybdenum-disulfide-nanocomposite-films
#15
Tae In Kim, Buki Kwon, Jonghee Yoon, Ick-Joon Park, Gyeong Sook Bang, YongKeun Park, Yeon-Soo Seo, Sung-Yool Choi
Two-dimensional (2D) nanomaterials, such as graphene-based materials and transition metal dichalcogenide (TMD) nanosheets, are promising materials for biomedical applications owing to their remarkable cytocompatibility and physicochemical properties. Based on their potent antibacterial properties, 2D materials have potential as antibacterial films, wherein the 2D nanosheets are immobilized on the surface and the bacteria may contact with the basal planes of 2D nanosheets dominantly rather than contact with the sharp edges of nanosheets...
February 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28197581/effect-of-crystallite-size-on-the-performance-and-phase-transformation-of-co3o4-al2o3-catalysts-during-co-prox-an-in-situ-study
#16
Thulani M Nyathi, Nico Fischer, Andy P E York, Michael Claeys
The preferential oxidation of carbon monoxide has been identified as an effective route to remove trace amounts of CO (approx. 0.5-1.0 vol%) in the H2-rich reformate gas stream after the low-temperature water-gas shift. Instead of noble metal-based catalysts, Co3O4-based catalysts were investigated in this study as cheaper and more readily available alternatives. This study aimed at investigating the effect of crystallite size on the mass- and surface area-specific CO oxidation activity as well as on the reduction behaviour of Co3O4...
February 15, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28195377/a-three-minute-method-for-high-throughput-quantitative-metabolomics-and-quantitative-tracing-experiments-of-central-carbon-and-nitrogen-pathways
#17
Travis Nemkov, Kirk C Hansen, Angelo D'Alessandro
RATIONALE: The implementation of mass spectrometry-based metabolomics is advancing many areas of biomedical research. The time associated with traditional chromatographic methods for resolving metabolites prior to mass analysis has limited the potential to perform large scale, highly powered metabolomics studies and clinical applications. METHODS: Here we describe a three-minute method for the rapid profiling of central metabolic pathways through UHPLC-MS, tracing experiments in vitro and in vivo, and targeted quantification of compounds of interest using spiked in heavy labeled standards...
February 13, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28194977/a-spectral-counting-approach-to-measure-selectivity-of-high-resolution-lc-ms-methods-for-environmental-analysis
#18
Justin B Renaud, Lyne Sabourin, Edward Topp, Mark W Sumarah
Advances in high resolution mass spectrometers have allowed for the development of non-targeted screening methods, where datasets can be archived and retrospectively mined as new environmental contaminants are identified. We have developed a spectral counting approach to calculate the selectivities of LC-MS acquisition modes taking mass accuracy, sample matrix and the analyte properties into account. The selectivities of high resolution MS (HRMS) alone or in combination with all-ion-fragmentation (AIF), data-independent-acquisition (DIA) and data-dependent-acquisition (DDA) modes, performed on a Q-Exactive Orbitrap were compared by retrospectively screening surface water samples for 95 pharmaceuticals...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28194674/biomonitoring-of-atmospheric-pollution-a-novel-approach-for-the-evaluation-of-natural-and-anthropogenic-contribution-to-atmospheric-aerosol-particles
#19
Rosa Caggiano, Giuseppe Calamita, Serena Sabia, Serena Trippetta
The investigation of the potential natural and anthropogenic contribution to atmospheric aerosol particles by using lichen-bag technique was performed in the Agri Valley (Basilicata region, southern Italy). This is an area of international concern since it houses one of the largest European on-shore reservoirs and the biggest oil/gas pre-treatment plant (i.e., Centro Olio Val d'Agri (COVA)) within an anthropized context. In particular, the concentrations of 17 trace elements (Al, Ca, Cd, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, P, Pb, S, Ti, and Zn) were measured in lichen bags exposed in 59 selected monitoring points over periods of 6 months (from October 2011 to April 2012) and 12 months (from October 2011 to October 2012)...
February 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28193061/metal-organic-frameworks-for-resonant-gravimetric-detection-of-trace-level-xylene-molecules
#20
Tao Xu, Pengcheng Xu, Dan Zheng, Haitao Yu, Xinxin Li
As one of typical VOCs, xylene is seriously harmful to human health. Nowadays, however, there is really lack of portable sensing method to directly detect environmental xylene that has chemical inertness. Especially when the concentration of xylene is lower than the human olfactory threshold of 470 ppb, people are indeed hard to be aware of and avoid this harmful vapor. Herein the metal-organic framework (MOF) of HKUST-1 is first explored for sensing to the nonpolar molecule of p-xylene. And the sensing mechanism is identified that is via host-guest interaction of MOF with xylene molecule...
December 20, 2016: Analytical Chemistry
keyword
keyword
12730
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"