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https://www.readbyqxmd.com/read/28724183/physiological-intra-cytoplasmic-sperm-injection-picsi-outcomes-after-oral-pretreatment-and-semen-incubation-with-myo-inositol-in-oligoasthenoteratozoospermic-men-results-from-a-prospective-randomized-controlled-trial
#1
T Korosi, C Barta, K Rokob, T Torok
OBJECTIVE: The aim of the current study was to evaluate the effect of an oral pretreatment with a mix of myo-inositol (Myo-Ins), folic acid, vitamin E, L-carnitine, L-arginine and selenium (Folandrol, Exeltis, Hungary) and subsequent direct Myo-Ins incubation of spermatozoa before Physiological Intra-Cytoplasmic Sperm Injection (PICSI) procedures in infertile couples due to oligoasthenoteratozoospermia with previous failed PICSI procedures. PATIENTS AND METHODS: We performed a prospective, randomized controlled trial at the Assisted Reproduction Unit of the Kaáli Institute (Győr, Hungary)...
June 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28724143/potentially-avoidable-surgical-intensive-care-unit-admissions-and-disposition-delays
#2
Navpreet K Dhillon, Ara Ko, Eric J T Smith, Mayumi Kharabi, Joseph Castongia, Michael Nurok, Bruce L Gewertz, Eric J Ley
Importance: High health care costs encourage initiatives that avoid overuse of resources and identify opportunities to promote appropriate care. Objective: To investigate the causes of potentially avoidable surgical intensive care unit (SICU) admissions and disposition delays to determine whether targeted interventions could decrease these stays. Design, Setting, and Participants: This prospective, observational study focused on potentially avoidable SICU days, as determined by observers with input from the rounding intensivists at a 24-bed open SICU at an urban, academic hospital...
July 19, 2017: JAMA Surgery
https://www.readbyqxmd.com/read/28723999/moving-towards-south-south-international-health-debts-and-challenges-in-the-regional-health-agenda
#3
María Belén Herrero
The aim of this paper is twofold. First, it aims to investigate the increased interest in health as an important dimension of the foreign policy and diplomatic concerns together with the emergence of a new framework for regional health integration and regional health diplomacy. Second, it seeks to understand the role and practices of new regional blocs in the field of health and whether they are conducting to the emergence of new strategies for addressing health regional policies in South America. The regional policy process relates to health as a right...
July 2017: Ciência & Saúde Coletiva
https://www.readbyqxmd.com/read/28723966/activated-carbon-a-useful-medium-to-bind-chlordecone-in-soil-and-limit-its-transfer-to-growing-goat-kids
#4
Sarah Yehya, Matthieu Delannoy, Agnès Fournier, Moomen Baroudi, Guido Rychen, Cyril Feidt
Chlordecone (Kepone) (CLD) is a highly persistent pesticide which was extensively used in the French West Indies; high levels of CLD can still currently be found in large agricultural areas. As CLD transfers from soil to animals mainly via involuntary ingestion, the consumption of foodstuffs derived from animals raised in contaminated areas may significantly contribute to exposure of humans to CLD. The present study was designed to test the efficacy of two different activated carbons (ACs) sources in limiting CLD transfer from soil to animal...
2017: PloS One
https://www.readbyqxmd.com/read/28723951/cd8-t-cells-provide-immune-protection-against-murine-disseminated-endotheliotropic-orientia-tsutsugamushi-infection
#5
Guang Xu, Nicole L Mendell, Yuejin Liang, Thomas R Shelite, Yenny Goez-Rivillas, Lynn Soong, Donald H Bouyer, David H Walker
Scrub typhus, caused by a Gram-negative obligately intracellular coccobacillus, Orientia tsutsugamushi, is a long neglected but important tropical disease. Orientia tsutsugamushi causes illness in one million people each year, and 1 billion people are at risk. Without appropriate diagnosis and treatment, the disease can cause severe multiorgan failure with a case fatality rate of 7-15%. The current gaps in knowledge of immunity include the unknown mechanisms of host immunity to O. tsutsugamushi. Using an intravenous (i...
July 19, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28723923/on-the-mechanism-of-candida-tropicalis-biofilm-reduction-by-the-combined-action-of-naturally-occurring-anthraquinones-and-blue-light
#6
Juliana Marioni, Roger Bresolí-Obach, Montserrat Agut, Laura R Comini, José L Cabrera, María G Paraje, Santi Nonell, Susana C Núñez Montoya
The photoprocesses involved in the photo-induced Candida tropicalis biofilm reduction by two natural anthraquinones (AQs), rubiadin (1) and rubiadin-1-methyl ether (2), were examined. Production of singlet oxygen (1O2) and of superoxide radical anion (O2•-) was studied. Although it was not possible to detect the triplet state absorption of any AQs in biofilms, observation of 1O2 phosphorescence incubated with deuterated Phosphate Buffer Solution, indicated that this species is actually formed in biofilms...
2017: PloS One
https://www.readbyqxmd.com/read/28723812/effects-of-12-weeks-resistance-training-on-sprint-and-jump-performance-in-competitive-adolescent-rugby-union-players
#7
Simon K Harries, David R Lubans, Anthony Buxton, Thomas H J MacDougall, Robin Callister
Sprint performance is an important characteristic for success in many sports, including rugby union. Resistance training is used to increase muscular fitness (i.e. strength, endurance and power) and may also be effective for improving sprint and jump performances. The aims of this study were to examine the effects of resistance training using two different periodized programs (linear and daily undulating) on sprint and jump performance and explore relationships between performance measures. Sixteen male (16...
July 17, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28723311/visual-perceptual-learning-and-models
#8
Barbara Dosher, Zhong-Lin Lu
Visual perceptual learning through practice or training can significantly improve performance on visual tasks. Originally seen as a manifestation of plasticity in the primary visual cortex, perceptual learning is more readily understood as improvements in the function of brain networks that integrate processes, including sensory representations, decision, attention, and reward, and balance plasticity with system stability. This review considers the primary phenomena of perceptual learning, theories of perceptual learning, and perceptual learning's effect on signal and noise in visual processing and decision...
July 19, 2017: Annual Review of Vision Science
https://www.readbyqxmd.com/read/28723279/magnetization-transfer-imaging-in-treatment-resistant-depression-structural-evidence-of-a-functional-derangement-that-might-help-guide-therapy
#9
Karen Buch, Bernardo Bizzo, Michael H Lev
No abstract text is available yet for this article.
August 2017: Radiology
https://www.readbyqxmd.com/read/28723206/evaluating-dye-labeled-dna-dendrimers-for-potential-applications-in-molecular-biosensing
#10
Carl W Brown, Susan Buckhout-White, Sebastián A Díaz, Joseph S Melinger, Mario G Ancona, Ellen R Goldman, Igor L Medintz
DNA nanostructures provide a reliable and predictable scaffold for precisely positioning fluorescent dyes to form energy transfer cascades. Furthermore, these structures and their attendant dye networks can be dynamically manipulated by biochemical inputs, with the changes reflected in the spectral response. However, the complexity of DNA structures that have undergone such types of manipulation for direct biosensing applications is quite limited. Here, we investigate four different modification strategies to effect such dynamic manipulations using a DNA dendrimer scaffold as a testbed, and with applications to biosensing in mind...
March 24, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723191/highly-enriched-controllable-continuous-aerosol-sampling-using-inertial-microfluidics-and-its-application-to-real-time-detection-of-airborne-bacteria
#11
Jeongan Choi, Seung Chan Hong, Woojin Kim, Jae Hee Jung
We report a novel microfluidic technique for sampling of aerosols into liquids. The two-phase fluid, sampling air and collecting liquid, forms a stratified flow in the curved microchannel. By passing fluids through the curved region, the particles are transferred from air into the liquid phase by the particle centrifugal and drag forces. This microfluidic-based aerosol-into-liquid sampling system, called the MicroSampler, is driven by particle inertial differences. To evaluate the physical particle collection efficiency of the MicroSampler, we used standard polystyrene-latex (PSL) particles ranging in size from 0...
April 28, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723172/periodically-patterned-au-tio2-heterostructures-for-photoelectrochemical-sensor
#12
Limin Guo, Zhao Li, Kyle Marcus, Steven Navarro, Kun Liang, Le Zhou, Prabhu Doss Mani, Stephen J Florczyk, Kevin R Coffey, Nina Orlovskaya, Yong-Ho Sohn, Yang Yang
Periodically patterned Au nanorods in TiO2 nanocavities (Au NRs@TiO2) were fabricated via magnetron sputtering followed by a thermal dewetting process. This innovative Au NRs@TiO2 heterostructure was used as a plasmonic sensing platform for photoelectrochemical detection of glucose and lactose. This Au NRs@TiO2 patterned heterostructure possesses superior sensing properties to other Au nanoparticle-based sensors because (i) localized surface plasmon resonance (LSPR) generated at Au/TiO2 interfaces enhanced sensitivity of glucose (lactose) amperometric detection; (ii) periodic Au nanocrystals in TiO2 nanocavities accelerated charge separation and transfer rate, especially under monochromatic blue light irradiation; (iii) discrete planar architectures comprising Au NRs immobilized on TiO2 substrates significantly improved stability and reusability of the sensors...
May 26, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723153/understanding-the-reactivity-of-co3-%C3%A2-and-no2-%C3%A2-radicals-towards-s-containing-and-aromatic-amino-acids
#13
Sharmistha Karmakar, Ayan Datta
The reactivity of CO3-(.) and NO2(.) radicals towards six amino acid side chains namely, cysteine (Cys), methionine (Met), phenylalanine (Phe), tyrosine (Tyr), histidine (His) and tryptophan (Trp), has been explored using state-of-art density functional theory (DFT) and transition state theory (TST). Three reaction mechanisms, namely hydrogen atom abstraction (HAT), radical adduct formation (RAF) and single electron transfer (SET) have been considered for detailed study. While CO3-(.) radical is highly reactive towards majority of amino acids, the reactivity of NO2(...
July 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28723147/quantum-dot-based-molecularly-imprinted-polymers-on-three-dimensional-origami-paper-microfluidic-chip-for-fluorescence-detection-of-phycocyanin
#14
Bowei Li, Zhong Zhang, Ji Qi, Na Zhou, Song Qin, Jaebum Choo, Lingxin Chen
In this work, we developed a novel strategy using fluorescent quantum dots (QDs) combined with molecularly imprinted polymers (MIPs) on three-dimensional (3D) origami paper-based microfluidic devices for specific recognition and sensitive detection of phycocyanin. This method can realize the liquid phase of QDs@MIPs being transferred to the solid-phase paper base and achieve easy portability for the analysis. Under optimal conditions, we successfully demonstrated the proposed paper@QDs@MIPs 3D microfluidic chip for the sensitive and selective detection of phycocyanin protein target in a simple and robust manner...
February 24, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723127/fluorescent-chemosensors-with-varying-degrees-of-intramolecular-charge-transfer-for-detection-of-a-nerve-agent-mimic-in-solutions-and-in-vapor
#15
Yuan-Chao Cai, Chen Li, Qin-Hua Song
Nerve agents are highly toxic organophosphorus compounds, and their possible use in terrorist attacks has led to increasing interest in the development of reliable and accurate methods to detect these lethal chemicals. In this paper, we have prepared six 6-aminoquinolines with various N-substituents as chemosensors for a nerve-agent mimic diethylchlorophosphate (DCP). The chemosensors with the nucleophilic pyridine-N atom as the active site detect DCP via a catalytic hydrolysis approach to form the protonated sensor...
June 23, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723120/graphene-oxide-nanoprisms-for-sensitive-detection-of-environmentally-important-aromatic-compounds-with-sers
#16
Peter V Shanta, Quan Cheng
Recent advances in graphene-based sensors have shown that heavily oxidized (GO) and reduced graphene oxide (rGO) are attractive materials for environmental sensing due to their unique chemical and physical properties. We describe here the fabrication of nanostructured GO assemblies with Ag nanoprisms for improved detection with surface enhanced Raman scattering (SERS). Specifically, 100-μm-sized, periodic-nanoprism-array domains were fabricated on top of the GO layers by GO-assisted lithography (GOAL). The atomically thin GO underlayers are shown to attract cyclic aromatic molecules to the surface, likely via π-π stacking interactions...
June 23, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723112/surfen-assembled-graphene-oxide-for-fluorescence-turn-on-detection-of-sulfated-glycosaminoglycans-in-biological-matrix
#17
Yen-Ting Wang, Wei-Lung Tseng
Sulfated glycosaminoglycans (GAGs) not only serve as a biomarker for mucopolysaccharidoses disease but also participate in various biological processes, such as blood clot medication (heparin) and signal transduction (heparan sulfate). However, few fluorescent sensors, such as 1,9-dimethylmethylene blue, have been developed for the detection of sulfated GAGs in the real world. Herein, we fabricated a surfen/few-layer graphene oxide (FLGO) nanocomplex for sensing sulfated GAGs in biological fluids. Surfen molecules are self-assembled onto the surface of FLGO through electrostatic attraction, and their fluorescence was then quenched by the creation of the FLGO-surfen complex (static quenching) and partially combined with the energy transfer from surfen to FLGO (dynamic quenching)...
June 23, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723110/portable-sensor-for-the-detection-of-choline-and-its-derivatives-based-on-silica-isoporous-membrane-and-gellified-nanointerfaces
#18
Lisiqi Xie, Xiao Huang, Bin Su
A portable amperometric ion sensor was fabricated by integrating silica isoporous membrane (SIM) and organogel composed of polyvinyl chloride and 1,2-dichloroethane (PVC-DCE) on a 3D-printed polymer chip. The detection of ionic species in aqueous samples could be accomplished by adding a microliter of sample droplet to the sensor and by identifying the ion-transfer potential and current magnitude at the water/organogel interface array templated by SIM. Thanks to the ultrasmall channel size (2-3 nm in diameter), high channel density (4 × 10(8) μm(-2)), and ultrathin thickness (80 nm) of SIM, the ensemble of nanoscopic water/organogel (nano-W/Gel) interface array behaved like a microinterface with two back-to-back hemispherical mass diffusion zones...
June 23, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723088/development-of-a-transferable-reactive-force-field-of-p-h-systems-application-to-the-chemical-and-mechanical-properties-of-phosphorene
#19
Hang Xiao, Xiaoyang Shi, Feng Hao, Xiangbiao Liao, Yayun Zhang, Xi Chen
We developed ReaxFF parameters for phosphorus and hydrogen to give a good description of the chemical and mechanical properties of pristine and defected black phosphorene. ReaxFF for P/H is transferable to a wide range of phosphorus and hydrogen containing systems including bulk black phosphorus, blue phosphorene, edge-hydrogenated phosphorene, phosphorus clusters and phosphorus hydride molecules. The potential parameters were obtained by conducting global optimization with respect to a set of reference data generated by extensive ab initio calculations...
July 19, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28723072/superposition-principle-in-auger-recombination-of-charged-and-neutral-multicarrier-states-in-semiconductor-quantum-dots
#20
Kaifeng Wu, Jaehoon Lim, Victor I Klimov
Application of colloidal semiconductor quantum dots (QDs) in optical and optoelectronic devices is often complicated by unintentional generation of extra charges, which opens fast nonradiative Auger recombination pathways whereby the recombination energy of an exciton is quickly transferred to the extra-carrier(s) and ultimately dissipated as heat. Previous studies of Auger recombination have primarily focused on neutral, and more recently, negatively charged multi-carrier states. Auger dynamics of positively charged species remains more poorly explored due to difficulties in creating, stabilizing, and detecting excess holes in the QDs...
July 19, 2017: ACS Nano
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