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https://www.readbyqxmd.com/read/28107902/electrolyzing-synthesis-of-boron-doped-graphene-quantum-dots-for-fluorescence-determination-of-fe-3-ions-in-water-samples
#1
Li Chen, Chuanli Wu, Pan Du, Xiaowei Feng, Ping Wu, Chenxin Cai
This work reports a facile electrolyzing method to synthesize boron-doped graphene quantum dots (BGQDs) and uses the BGQDs as a fluorescent probe to determine Fe(3+) ion levels in water samples. The BGQDs were produced by oxidizing graphite in an aqueous borax solution at pH 7; then, the borate solution was filtered with BGQDs, and the borate was dialyzed from the filtrate, leaving a solution of BGQDs in water. The amount of the B in the BGQDs can be adjusted by changing the concentration of borax used for the electrolyte...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107859/dengue-fever-may-mislead-the-surgeons-when-it-presents-as-an-acute-abdomen
#2
Bingumal Jayasundara, Lalith Perera, Ajith de Silva
OBJECTIVE: To review the management experience of a consecutive series of patients presenting as acute surgical abdomen whom were ultimately diagnosed to have DF (Dengue fever)/DHF (Dengue hemorrhagic fever). METHODS: Clinical data of all cases of apparent acute abdomen (AA) which were later confirmed as having DF/DHF reviewed by two surgical units from December 2012 to December 2013 were analyzed. Initially confirmed patients with DF/DHF who developed abdominal symptoms were not considered...
January 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28103835/a-novel-putatively-null-fgd1-variant-leading-to-aarskog-scott-syndrome-in-a-family-from-uae
#3
Abdul Rezzak Hamzeh, Fatima Saif, Pratibha Nair, Asma Jassim Binjab, Madiha Mohamed, Mahmoud Taleb Al-Ali, Fatma Bastaki
BACKGROUND: The X-linked condition "Aarskog-Scott syndrome (AAS)" causes a characteristic combination of short stature, facial, genital and skeletal anomalies. Studies elucidated a causative link between AAS and mutations in the FGD1 gene, which encodes a Rho/Rac guanine exchange factor. FGD1 is involved in regulating signaling pathways that control cytoskeleton organization and embryogenesis. CASE PRESENTATION: FGD1 was studied in an Emirati family with two cases of AAS using PCR amplification and direct sequencing of the entire coding region of the gene...
January 19, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28102444/patients-with-bicuspid-and-tricuspid-aortic-valve-exhibit-distinct-regional-microrna-signatures-in-mildly-dilated-ascending-aorta
#4
Sebastian Albinsson, Alessandro Della Corte, Azra Alajbegovic, Katarzyna K Krawczyk, Ciro Bancone, Umberto Galderisi, Marilena Cipollaro, Marisa De Feo, Amalia Forte
MicroRNAs are able to modulate gene expression in a range of diseases. We focused on microRNAs as potential contributors to the pathogenesis of ascending aorta (AA) dilatation in patients with stenotic tricuspid (TAV) or bicuspid aortic valve (BAV). Aortic specimens were collected from the 'concavity' and the 'convexity' of mildly dilated AAs and of normal AAs from heart transplant donors. Aortic RNA was analyzed through PCR arrays, profiling the expression of 84 microRNAs involved in cardiovascular disease...
January 19, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28095819/adhd-comorbid-disorders-and-psychosocial-functioning-how-representative-is-a-child-cohort-study-findings-from-a-national-patient-registry
#5
Beate Oerbeck, Kristin Romvig Overgaard, Stian Thoresen Aspenes, Are Hugo Pripp, Marianne Mordre, Heidi Aase, Ted Reichborn-Kjennerud, Pal Zeiner
BACKGROUND: Cohort studies often report findings on children with Attention Deficit Hyperactivity Disorder (ADHD) but may be biased by self-selection. The representativeness of cohort studies needs to be investigated to determine whether their findings can be generalised to the general child population. The aim of the present study was to examine the representativeness of child ADHD in the Norwegian Mother and Child Cohort Study (MoBa). METHODS: The study population was children born between January 1, 2000 and December 31, 2008 registered with hyperkinetic disorders (hereafter ADHD) in the Norwegian Patient Registry during the years 2008-2013, and two groups of children with ADHD were identified in: 1...
January 17, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28089694/affective-and-cognitive-correlates-of-ptsd-electrocortical-processing-of-threat-and-perseverative-errors-on-the-wcst-in-combat-related-ptsd
#6
Julia A DiGangi, Autumn Kujawa, Darrin M Aase, Joseph M Babione, Christopher Schroth, David M Levy, Amy E Kennedy, Justin E Greenstein, Eric Proescher, Robert Walters, Holly Passi, Scott A Langenecker, K Luan Phan
PTSD is characterized by both affective and cognitive dysfunction. Affectively, PTSD is associated with both heightened emotional reactivity and disengagement. Cognitively, perseverative thinking is a core feature of the disorder. In order to assess the interactive effects of affective and cognitive correlates of PTSD symptoms, 47 OEF/OIF/OND veterans completed an emotional faces matching task while EEG (i.e., late positive potential; LPP) was recorded, and separately completed the Wisconsin Card Sorting Test (WCST) to assess perseverative errors...
January 13, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28088549/redistribution-of-elements-between-wastes-and-organic-bearing-material-in-the-dispersion-train-of-gold-bearing-sulfide-tailings-part-i-geochemistry-and-mineralogy
#7
B Yu Saryg-Ool, I N Myagkaya, I S Kirichenko, M A Gustaytis, O V Shuvaeva, S M Zhmodik, E V Lazareva
Migration and redistribution of elements during prolonged interaction of cyanide wastes with the underlying natural organic-bearing material have been studied in two ~40cm deep cores that sample primary ores and their weathering profile (wastes I and II, respectively) in the dispersion train of gold-bearing sulfide tailings in Siberia. Analytical results of SR-XRF, whole-rock XRF, AAS, CHNS, and SEM measurements of core samples show high K, Sr, Ti, and Fe enrichments and correlation of P2O5 and Mn with LOI and Corg...
January 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28078887/electrospun-regenerated-cellulose-nanofiber-membranes-surface-grafted-with-water-insoluble-poly-hema-or-water-soluble-poly-aas-chains-via-the-atrp-method-for-ultrafiltration-of-water
#8
Zhao Wang, Caitlin Crandall, Vicki L Prautzsch, Rajesh Sahadevan, Todd J Menkhaus, Hao Fong
Electrospun nanofiber membranes (ENMs) have demonstrated promising applications for water purification primarily due to high water flux and low degree of fouling. However, the equivalent/apparent pore sizes of as-electrospun ENMs are in microns/submicrons; therefore, the ENMs can only be directly utilized for microfiltration applications. To make regenerated cellulose (RC) ENMs for ultrafiltration applications, atom transfer radical polymerization (ATRP) was studied to graft polymer chains onto the surface of RC nanofibers; specifically, monomers of 2-hydroxyethyl methacrylate (HEMA) and sodium acrylate (AAS) were selected for surface-grafting water-insoluble and water-soluble polymer chains onto RC nanofibers, respectively...
January 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28078323/genetic-architecture-of-age-related-cognitive-decline-in-african-americans
#9
Towfique Raj, Lori B Chibnik, Cristin McCabe, Andus Wong, Joseph M Replogle, Lei Yu, Sujuan Gao, Frederick W Unverzagt, Barbara Stranger, Jill Murrell, Lisa Barnes, Hugh C Hendrie, Tatiana Foroud, Anna Krichevsky, David A Bennett, Kathleen S Hall, Denis A Evans, Philip L De Jager
OBJECTIVE: To identify genetic risk factors associated with susceptibility to age-related cognitive decline in African Americans (AAs). METHODS: We performed a genome-wide association study (GWAS) and an admixture-mapping scan in 3,964 older AAs from 5 longitudinal cohorts; for each participant, we calculated a slope of an individual's global cognitive change from neuropsychological evaluations. We also performed a pathway-based analysis of the age-related cognitive decline GWAS...
February 2017: Neurology. Genetics
https://www.readbyqxmd.com/read/28078086/unusual-aerobic-performance-at-high-temperatures-in-juvenile-chinook-salmon-oncorhynchus-tshawytscha
#10
Jamilynn B Poletto, Dennis E Cocherell, Sarah E Baird, Trinh X Nguyen, Valentina Cabrera-Stagno, Anthony P Farrell, Nann A Fangue
Understanding how the current warming trends affect fish populations is crucial for effective conservation and management. To help define suitable thermal habitat for juvenile Chinook salmon, the thermal performance of juvenile Chinook salmon acclimated to either 15 or 19°C was tested across a range of environmentally relevant acute temperature changes (from 12 to 26°C). Swim tunnel respirometers were used to measure routine oxygen uptake as a measure of routine metabolic rate (RMR) and oxygen uptake when swimming maximally as a measure of maximal metabolic rate (MMR) at each test temperature...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28067522/development-of-a-postcolumn-infused-internal-standard-liquid-chromatography-mass-spectrometry-method-for-quantitative-metabolomics-studies
#11
Hsiao-Wei Liao, Guan-Yuan Chen, Ming-Shiang Wu, Wei-Chih Liao, Ching-Hung Lin, Ching-Hua Kuo
Quantitative metabolomics has become much more important in clinical research in recent years. Individual differences in matrix effects (MEs) and the injection order effect are two major factors that reduce the quantification accuracy in liquid chromatography-electrospray ionization-mass spectrometry-based (LC-ESI-MS) metabolomics studies. This study proposed a postcolumn infused-internal standard (PCI-IS) combined with a matrix normalization factor (MNF) strategy to improve the analytical accuracy of quantitative metabolomics...
January 19, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28065664/racial-differences-in-stage-iv-colorectal-cancer-survival-in-younger-and-older-patients
#12
Kristin Wallace, Allan DeToma, David N Lewin, Shaoli Sun, Don Rockey, Carolyn D Britten, Jennifer D Wu, Aissatou Ba, Anthony J Alberg, Elizabeth G Hill
INTRODUCTION: African Americans (AAs) compared with European Americans (EAs) have poorer stage-specific survival from colorectal cancer (CRC). Recent reports have indicated that the racial difference in survival has worsened over time, especially among younger patients. To better characterize this association, we used population-based Surveillance, Epidemiology, and End Results registry data to evaluate the effect of race on stage IV CRC survival in patients aged < 50 and ≥ 50 years...
December 7, 2016: Clinical Colorectal Cancer
https://www.readbyqxmd.com/read/28061371/low-level-arsenic-exposure-via-drinking-water-consumption-and-female-fecundity-a-preliminary-investigation
#13
Michele L Susko, Michael S Bloom, Iulia A Neamtiu, Allison A Appleton, Simona Surdu, Cristian Pop, Edward F Fitzgerald, Doru Anastasiu, Eugen S Gurzau
High level arsenic exposure is associated with reproductive toxicity in experimental and observational studies; however, few data exist to assess risks at low levels. Even less data are available to evaluate the impact of low level arsenic exposure on human fecundity. Our aim in this pilot study was a preliminary evaluation of associations between low level drinking water arsenic contamination and female fecundity. This retrospective study was conducted among women previously recruited to a hospital-based case-control study of spontaneous pregnancy loss in Timiṣ County, Romania...
January 3, 2017: Environmental Research
https://www.readbyqxmd.com/read/28058451/application-of-thermospray-flame-furnace-atomic-absorption-spectrometry-for-investigation-of-silver-nanoparticles
#14
Natnicha Sirirat, Kornrawee Tetbuntad, Atitaya Siripinyanond
Thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) was applied to investigate the time-dependent absorption peak profile of various forms of silver. The thermospray flame furnace was set up with a 10-cm-long nickel tube with six holes, each 2.0 mm in diameter, to allow the flame to enter, and this nickel tube acted as a furnace. A sample of 300 μL was introduced into this furnace by use of water as a carrier at a flow rate of 0.5 mL min(-1) through the ceramic capillary (0.5-mm inner diameter and 2...
January 5, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28053172/protein-synthesis-in-mucin-producing-tissues-is-conserved-when-dietary-threonine-is-limiting-in-piglets
#15
Lalani L Munasinghe, Jason L Robinson, Scott V Harding, Janet A Brunton, Robert F Bertolo
BACKGROUND: The neonatal gastrointestinal tract extracts the majority of dietary threonine on the first pass to maintain synthesis of threonine-rich mucins in mucus. As dietary threonine becomes limiting, this extraction must limit protein synthesis in extraintestinal tissues at the expense of maintaining protein synthesis in mucin-producing tissues. OBJECTIVE: The objective was to determine the dietary threonine concentration at which protein synthesis is reduced in various tissues...
January 4, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28053111/evolutionary-interplay-between-structure-energy-and-epistasis-in-the-coat-protein-of-the-%C3%AF-x174-phage-family
#16
Rodrigo A F Redondo, Harold P de Vladar, Tomasz Włodarski, Jonathan P Bollback
Viral capsids are structurally constrained by interactions among the amino acids (AAs) of their constituent proteins. Therefore, epistasis is expected to evolve among physically interacting sites and to influence the rates of substitution. To study the evolution of epistasis, we focused on the major structural protein of the ϕX174 phage family by first reconstructing the ancestral protein sequences of 18 species using a Bayesian statistical framework. The inferred ancestral reconstruction differed at eight AAs, for a total of 256 possible ancestral haplotypes...
January 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28050665/a-prospective-assessment-of-clinical-and-patient-reported-outcomes-of-initial-non-operative-management-of-ventral-hernias
#17
Julie L Holihan, Juan R Flores-Gonzalez, Jiandi Mo, Tien C Ko, Lillian S Kao, Mike K Liang
BACKGROUND: Little is known about the clinical or patient-reported outcomes with non-operative management of ventral hernias. The aim of this prospective study is to determine the clinical and patient-reported outcomes of patients undergoing initial non-operative treatment of their ventral hernia. STUDY DESIGN: This was a prospective observational study of patients undergoing non-operative management of ventral hernias. Primary outcome was rate of surgical repair of the ventral hernias...
January 3, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28048937/reusable-catalyst-for-transfer-hydrogenation-of-aldehydes-and-ketones-designed-by-anchoring-palladium-as-nano-particles-on-graphene-oxide-functionalized-with-selenated-amine
#18
Renu Bhaskar, Hemant Joshi, Alpesh Kumar Sharma, Ajai K Singh
The treatment of graphene oxide with ClCH2COOH, thionyl chloride and 2-(phenylselenyl)ethylamine successively has resulted in functionalization of its surface with selenated ethylamine molecules which may act as chelating (Se, N) ligands. The graphene oxide grafted with (Se, N) donor sites (GO-Se) on treatment with Na2PdCl4 and NaOH gave GO-Se anchored with Pd(0) nano-particles (NPs) (GO-Se-Pd). The X-ray diffraction(powder), FT-IR, XPS, Raman spectroscopy, thermogravimetric analysis (TGA), electron microscopic techniques (SEM and HR-TEM) authenticated the formation of GO-Se-Pd...
January 3, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28043942/a-cognitive-turning-point-in-development-of-clinical-alzheimer-s-disease-dementia-and-mild-cognitive-impairment-a-biracial-population-study
#19
Kumar B Rajan, Robert S Wilson, Lisa L Barnes, Neelum T Aggarwal, Jennifer Weuve, Denis A Evans
BACKGROUND: Cognitive changes during the preclinical phase of Alzheimer's disease (AD) dementia have been characterized among European Americans (EAs), but studies of preclinical changes among African Americans (AAs) are notably absent. METHODS: Preclinical changes in cognition before the development of AD dementia and mild cognitive impairment over a period of 18 years were examined using change points in a biracial sample of 2,125 older adults. RESULTS: Of 2,125 participants, 442 (21%) developed AD dementia and 661 (31%) developed mild cognitive impairment...
January 1, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28038389/adherence-to-antiepileptic-drugs-among-diverse-older-americans-on-part-d-medicare
#20
Kendra Piper, Joshua Richman, Edward Faught, Roy Martin, Ellen Funkhouser, Jerzy P Szaflarski, Chen Dai, Lucia Juarez, Maria Pisu
INTRODUCTION: Older minority groups are more likely to have poor AED adherence. We describe adherence to antiepileptic drugs (AEDs) among older Americans with epilepsy. METHODS: In retrospective analyses of 2008-2010 Medicare claims for a 5% random sample of beneficiaries augmented by minority representation, epilepsy cases in 2009 were those with ≥1 claim with ICD-9345.x or ≥2 with 780.3x, and ≥1 AED. New-onset cases had no such claims or AEDs in the year before the 2009 index event...
December 27, 2016: Epilepsy & Behavior: E&B
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