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https://www.readbyqxmd.com/read/29031213/impairment-of-heart-rhythm-complexity-in-patients-with-drug-resistant-epilepsy-an-assessment-with-multiscale-entropy-analysis
#1
Hongyun Liu, Zhao Yang, Fangang Meng, Yuguang Guan, Yanshan Ma, Shuli Liang, Jiuluan Lin, Longsheng Pan, Mingming Zhao, Wei Qu, Hongwei Hao, Guoming Luan, Jianguo Zhang, Luming Li
OBJECTIVE: Epilepsy and seizures can have dramatic effects on the cardiac function. The aim of this study was to investigate the heart rhythm complexity in patients with drug-resistant epilepsy (DRE). METHODS: Ambulatory 24-h electrocardiograms (ECG) from 70 DRE patients and 50 healthy control subjects were analyzed using conventional heart rate variability (HRV) and multiscale entropy (MSE) methods The variation of complexity indices (CI), which was calculated from MSE profile, was determined...
October 5, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/29031188/azithromycin-sorption-and-biodegradation-in-a-simulated-california-river-system
#2
Monica L Vermillion Maier, Ronald S Tjeerdema
Azithromycin (AZ) is a widely-used macrolide antibiotic that is continually deposited into natural waterways by sewage effluent. Though recognized as an emerging contaminant of concern, little is known about its fate and transport in aquatic systems. American River soils and water were used to determine degradation of AZ in microcosms simulating flooded (anaerobic) and non-flooded (aerobic) California watershed conditions. Under aerobic conditions the degradation rate constant (k=0.0084 ± 0.0039 day(-1)) and DT50 (82...
October 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/29031137/the-association-between-habitual-walking-speed-and-medial-femoral-cartilage-deformation-following-30minutes-of-walking
#3
Matthew S Harkey, J Troy Blackburn, Hope Davis, Leslie Sierra-Arévalo, Daniel Nissman, Brian Pietrosimone
Habitual walking speed is a key functional outcome that has implications for knee biomechanics that occur during gait. Lower extremity biomechanics during walking affects the loading of the femoral cartilage. Ultrasonography (US) can be used to assess resting femoral cartilage thickness and acute cartilage deformation in response to walking. The purpose of this study was to determine the association between habitual walking speed and both resting femoral cartilage thickness and deformation. Twenty-four healthy participants with no history of knee injury volunteered for this study...
October 7, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29031133/nmr-diffusometry-data-sampling-optimization-for-mixture-analysis
#4
Florence Franconi, Laurent Lemaire, Benjamin Siegler, Jean-Christophe Gimel, Patrick Saulnier
NMR diffusometry is a powerful but challenging method to analyze complex mixture. Each component diffuses differently, from the faster small species to the slower large species, corresponding to different signal attenuation. However, the method is highly sensitive to the quality of the acquired data and the performance of the processing used to resolve multiexponential signals influences. Adapting the signal decay sampling to the mixture composition is one way to improve the precision of the measure. In this work, we propose a prediction tool, based on the calculation of the Cramér-Rao lower bound to minimize the variance of diffusion coefficient estimation in order to determine the optimal number of diffusion gradient steps, the best diffusion gradient sampling (among linear, exponential, quadratic and sigmoidal ones) and the optimal maximum diffusion factor...
October 2, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29031124/a-relay-identification-fluorescence-probe-for-fe-3-and-phosphate-anion-and-its-applications
#5
Xu Tang, Yun Wang, Juan Han, Liang Ni, Lei Wang, Longhua Li, Huiqin Zhang, Cheng Li, Jing Li, Haoran Li
A simple relay identification fluorescence probe for Fe(3+) and phosphate anion with "on-off-on" switching was designed and synthesized based on the phenylthiazole and biphenylcarbonitrile. Probe 1 displayed highly selective and sensitive recognition to Fe(3+) in HEPES aqueous buffer (EtOH/H2O=2:8, v/v, pH=7.4) solutions. The optimized structures and HOMO and LUMO of probe 1 and [1-Fe(3+)] complex were obtained by the density functional theory (DFT) calculations with B3LYP as the exchange and correlation functional using a suite of Gaussian 09 programs...
October 9, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29031107/accuracy-precision-and-inter-rater-reliability-of-micro-ct-analysis-of-false-starts-on-bones-a-preliminary-validation-study
#6
Guido Pelletti, Giovanni Cecchetto, Alessia Viero, Paolo Fais, Michael Weber, Diego Miotto, Massimo Montisci, Guido Viel, Chiara Giraudo
Micro computed tomography (micro-CT) has already been proposed as a useful technique for the qualitative analysis of false starts (FS) produced on human bones, although the reliability and the error rate of this technique have not been tested yet, neither for qualitative nor for quantitative assessments. The aim of the present study was to test the morphological agreement, accuracy, precision and inter-rater reliability of micro-CT analysis of FS on bones. The morphological agreement was assessed through the degree of concordance among the 3 independent blind raters in the identification of the shape of 24 FS manually produced on bones by 3 different saws (8 FS for each saw)...
October 6, 2017: Legal Medicine
https://www.readbyqxmd.com/read/29031101/radionuclides-in-mushrooms-and-soil-to-mushroom-transfer-factors-in-certain-areas-of-china
#7
Fei Tuo, Jing Zhang, Wenhong Li, Shuaimo Yao, Qiang Zhou, Zeshu Li
Activity concentrations of (238)U, (226)Ra, (228)Ra, (137)Cs and (40)K in 64 mushroom samples collected in China from Yunnan, Fujian and Heilongjiang Provinces, were measured. Gamma-ray emissions were determined by using high-purity germanium (HPGe) γ spectrometry. The range of concentrations (Bq kg(-1) dry weight) for (238)U, (226)Ra, (228)Ra, (137)Cs and (40)K in all investigated mushroom samples were from 0.12 to 12, 0.05 to 7.5, 0.14 to 14, MDC(<0.01) to 339, and 396 to 1880, respectively. Activity concentrations of (137)Cs in mushrooms showed some variation between species sampled at the same site...
October 11, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29031085/a-study-on-the-extrinsic-sensitivity-and-counting-efficiency-of-a-gamma-camera-for-a-cylindrical-source-and-a-rectangular-detector
#8
Rukiye Çakır Haliloğlu, Özlem Karadeniz, Hatice Durak
In this work, the extrinsic counting efficiency and extrinsic sensitivity of a cylindrical source and a gamma camera with a rectangular detector were determined using homogeneous Tc-99(m). Scattered radiation effects were evaluated by both analyzing the energy spectrum of (99m)Tc for the scatter fraction and plotting the extrinsic counting efficiency and sensitivity. It is found that the scattered fraction values increased with increasing source thickness. Calculated extrinsic sensitivity shows a gradually decreasing trend with increasing source thickness...
October 4, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/29031027/evaluation-of-renal-perfusion-in-hyperthyroid-cats-before-and-after-radioiodine-treatment
#9
E Stock, S Daminet, D Paepe, E Buresova, E Vandermeulen, P Smets, L Duchateau, J H Saunders, K Vanderperren
BACKGROUND: Hyperthyroidism and chronic kidney disease (CKD) are common in elderly cats. Consequently, both diseases often occur concurrently. Furthermore, renal function is affected by thyroid status. Because changes in renal perfusion play an important role in functional renal changes in hyperthyroid cats, investigation of renal perfusion may provide novel insights. OBJECTIVES: To evaluate renal perfusion in hyperthyroid cats with contrast-enhanced ultrasound (CEUS)...
October 14, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29031025/measurement-variation-and-repeatability-of-echocardiographic-variables-used-to-estimate-pulmonary-artery-pressure-in-dogs
#10
J A Abbott, J M Gentile-Solomon
BACKGROUND: Pulmonary hypertension (PH) is an important clinical entity in dogs. Pulmonary hypertension is generally identified based on echocardiographic findings, but measurement variation of the variables most often used in this context has not been reported. OBJECTIVE: To define measurement variation of echocardiographic variables that are used to estimate pulmonary artery pressure. ANIMALS: Four dogs with subclinical tricuspid valve regurgitation were selected from a hospital population...
October 14, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29031014/indirect-method-for-validating-transference-of-reference-intervals
#11
Simon Lykkeboe, Claus Gyrup Nielsen, Peter Astrup Christensen
BACKGROUND: Transference of reference intervals (RIs) from multicentre studies are often verified by use of a small number of samples from reference individuals or by the use of one serum sample (Serum X for NORIP RI). Despite recommended and appropriate methods, both have inconveniencies and drawbacks. Several attempts have been made to develop an indirect method, which uses historical data from the laboratory. These methods are retrospective relying on older test results. A near prospective method would be preferable for the laboratories introducing new methods or changing analytical platforms...
October 14, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/29030070/a-latex-agglutination-assay-to-quantify-the-amount-of-hemagglutinin-protein-in-adjuvanted-low-dose-influenza-monovalent-vaccines
#12
Sophie Buffin, Nabila Ikhelef, Julien Prudent, Joseline Dubayle, Nolwenn Nougarede, Marie-Pierre Varenne, Catherine Moste, Isabelle Legastelois
To formulate inactivated influenza vaccines, the concentration of hemagglutinin (HA) must be accurately determined. The standard test currently used to measure HA in influenza vaccines is the Single Radial Immunodiffusion (SRID) assay. We developed a very rapid, simple and sensitive alternative quantitative HA assay, namely the Latex Agglutination Assay (LAA). The LAA uses the Spherotest(®) technology, which is based on the agglutination of HA-specific immunoglobulin-coated latex beads. The amount of HA in a sample is calculated from the level of bead agglutination by a simple absorbance measurement at 405nm against a standard curve generated using a monovalent vaccine standard...
October 10, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/29029366/directly-coupled-vs-spectator-linkers-on-diimine-pt-ii-acetylides-change-the-structure-keep-the-function
#13
Stuart Archer, Theo Keane, Milan Delor, Elizabeth Bevon, Alexander Auty, Dimitri Chekulaev, Igor Sazanovich, Michael Towrie, Antony Meijer, Julia Weinstein
A series of [Donor-Acceptor-Anchor] Platinum(II) bipy (bis)acetylides has been developed in order to systematically compare the effect of conjugated vs. electronically decoupled modes of attachment of protected anchoring groups on the photophysical properties of these light-harvesting units. This first example of "decoupled" phosphonate-diimine Pt(II) complexes presented here are compared and contrasted to their carboxylate analogs. Ultrafast TRIR and femtosecond transient absorption spectroscopies revealed that all complexes possess a charge transfer lowest excited state, with lifetimes between 2 and 14 ns...
October 13, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29029354/cost-analysis-of-sending-routine-pathology-specimens-following-total-joint-arthroplasty-in-the-age-of-bundled-payments
#14
Hayden S Holbrook, Johannes F Plate, Maxwell K Langfitt, Jason E Lang, John S Shields
Bundled payment plans are being developed as a means to curb healthcare spending. Routine histology following total hip arthroplasties (THA) and total knee arthroplasties (TKA) is standard practice at many institutions. Recently, the value of this practice has been questioned as histologic diagnoses in THA and TKA rarely differ from the clinical diagnoses. The goal of this study is to identify discrepant and discordant diagnoses following THA and TKA at an academic medical center and to calculate the cost-saving potential in the setting of a bundled payment plan...
October 12, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/29029347/childhood-health-and-educational-outcomes-associated-with-maternal-sleep-apnea-a-population-record-linkage-study
#15
Yu Sun Bin, Peter A Cistulli, Christine L Roberts, Jane B Ford
Objectives: Sleep apnea in pregnancy is known to adversely affect birth outcomes. Whether in utero exposure to maternal sleep apnea is associated with long-term childhood consequences is unclear. Methods: Population-based longitudinal study of singleton infants born during 2002 to 2012 was conducted using linked birth, hospital, death, developmental, and educational records from New South Wales, Australia. Maternal sleep apnea during pregnancy was identified from hospital records...
October 5, 2017: Sleep
https://www.readbyqxmd.com/read/29029313/subjective-objective-sleep-discrepancy-is-associated-with-alterations-in-regional-glucose-metabolism-in-patients-with-insomnia-and-good-sleeper-controls
#16
Daniel B Kay, Helmet T Karim, Adriane M Soehner, Brant P Hasler, Jeffrey A James, Anne Germain, Martica H Hall, Peter L Franzen, Julie C Price, Eric A Nofzinger, Daniel J Buysse
Objectives: Sleep discrepancies are common in primary insomnia (PI), and include reports of longer sleep onset latency (SOL) than measured by polysomnography (PSG), or "negative SOL discrepancy." We hypothesized that negative SOL discrepancy in PI would be associated with higher relative glucose metabolism during non-rapid eye movement (NREM) sleep in brain networks involved in conscious awareness, including the salience, left executive control, and default mode networks. Methods: PI (n=32) and good sleeper controls (GS; n=30) completed [ 18F]fluorodeoxyglucose positron emission tomography (FDG-PET) scans during NREM sleep and relative regional cerebral metabolic rate for glucose (rCMRglc) was measured...
October 3, 2017: Sleep
https://www.readbyqxmd.com/read/29029300/flight-activity-and-field-infestation-relationships-for-coffee-berry-borer-in-commercial-coffee-plantations-in-kona-and-kau-districts-hawaii
#17
Luis F Aristizábal, Suzanne Shriner, Robert Hollingsworth, Steven Arthurs
The coffee berry borer (CBB), Hypothenemus hampei Ferrari (Coleoptera: Curculionidae: Scolytinae) is a recent invader to Hawaii. To date, limited information regarding the seasonal phenology of this pest on the islands limits the implementation of integrated control strategies. As part of a coffee farmer training program, we monitored CBB flight activity in 15 coffee plantations (Kona and Kau Districts) over 10 mo with methanol-ethanol (3:1 ratio) baited traps. Concurrently, we quantified CBB infestation and penetration rates inside developing coffee berries through the end of harvest...
September 27, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29029295/probabilistic-distances-between-trees
#18
Maryam Garba, Tom M W Nye, Richard J Boys
Most existing measures of distance between phylogenetic trees are based on the geometry or topology of the trees. Instead, we consider distance measures which are based on the underlying probability distributions on genetic sequence data induced by trees. Monte Carlo schemes are necessary to calculate these distances approximately, and we describe efficient sampling procedures. Key features of the distances are the ability to include substitution model parameters and to handle trees with different taxon sets in a principled way...
October 4, 2017: Systematic Biology
https://www.readbyqxmd.com/read/29029285/selection-of-reference-genes-for-expression-studies-in-diaphorina-citri-hemiptera-liviidae
#19
Meire Menezes Bassan, Je Ssika Angelotti-Mendonc A, Gustavo Rodrigues Alves, Pedro Takao Yamamoto, Francisco de Assis Alves Moura O Filho
The Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Liviidae), is considered the main vector of the bacteria associated with huanglongbing, a very serious disease that has threatened the world citrus industry. The absence of efficient control management protocols, including a lack of resistant cultivars, has led to the development of different approaches to study this pathosystem. The production of resistant genotypes relies on D. citri gene expression analyses by RT-qPCR to assess control of the vector population...
September 27, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29029256/multicentre-validation-of-4-well-azole-agar-plates-as-a-screening-method-for-detection-of-clinically-relevant-azole-resistant-aspergillus-fumigatus
#20
Maiken Cavling Arendrup, Paul E Verweij, Johan W Mouton, Katrien Lagrou, Joseph Meletiadis
Objectives: Azole-resistant Aspergillus fumigatus is emerging worldwide. Reference susceptibility testing methods are technically demanding and no validated commercial susceptibility tests for moulds currently exist. In this multicentre study a 4-well azole-containing screening agar method was evaluated using clinically relevant isolates. Methods: Forty WT and 39 cyp51A mutant A. fumigatus [G54 (n = 10), M220 (n = 10), TR34/L98H (n = 9) and TR46/Y121F/T289A (n = 10)] were tested individually and as simulated mixed samples (sampling 4 WT and 1 mutant colonies)...
October 4, 2017: Journal of Antimicrobial Chemotherapy
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