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https://www.readbyqxmd.com/read/29762621/ni-core-cuo-shell-fibers-produced-by-electrospinning-and-electroplating-as-efficient-photocathode-materials-for-solar-water-splitting
#1
Hong-Seok Jo, Min-Woo Kim, Bhavana Joshi, Edmund Samuel, Hyun Yoon, Mark T Swihart, Sam S Yoon
Charge recombination in CuO photocathodes inhibits efficient electron flow and limits the photo-electrochemical performance of these cathodes for solar water splitting. To circumvent this shortcoming, we introduce highly conductive Ni/CuO core-shell structured fibers. The photocurrent density (PCD) achieved with these core-shell fibers exceeded that of fibers without a Ni core by a factor of 2.6. The PCD enhancement arises from increased acceptor concentration and electron-hole recombination time, as measured by electrochemical impedance spectroscopy...
May 15, 2018: Nanoscale
https://www.readbyqxmd.com/read/29760994/nth-order-linear-algorithm-for-diffuse-correlation-tomography
#2
Xiaojuan Zhang, Zhiguo Gui, Zhiwei Qiao, Yi Liu, Yu Shang
The current approaches to imaging the tissue blood flow index (BFI) from diffuse correlation tomography (DCT) data are either an analytical solution or a finite element method, both of which are unable to simultaneously account for the tissue heterogeneity and fully utilize the DCT data. In this study, a new imaging concept for DCT, namely NL-DCT, was created by us in which the medical images are combined with light Monte Carlo simulation to provide geometrical and heterogeneous information in tissue. Moreover, the DCT data at multiple delay time are fully utilized via iterative linear regression...
May 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29759739/aortic-valve-bypass-surgery-in-severe-aortic-valve-stenosis-insights-from-cardiac-and-brain-magnetic-resonance-imaging
#3
Cesare Mantini, Massimo Caulo, Daniele Marinelli, Piero Chiacchiaretta, Armando Tartaro, Antonio Raffaele Cotroneo, Gabriele Di Giammarco
OBJECTIVE: To investigate and describe the distribution of aortic and cerebral blood flow (CBF) in patients with severe valvular aortic stenosis (AS) before and after aortic valve bypass (AVB) surgery. METHODS: We enrolled 10 consecutive patients who underwent AVB surgery for severe AS. Cardiovascular magnetic resonance imaging (CMR) and brain magnetic resonance imaging were performed as baseline before surgery and twice after surgery. Quantitative flow measurements were obtained using 1...
April 13, 2018: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29758550/microrna-449a-inhibition-protects-h9c2-cells-against-hypoxia-reoxygenation-induced-injury-by-targeting-the-notch-1-signaling-pathway
#4
Jing Cheng, Qianfu Wu, Rong Lv, Li Huang, Banglong Xu, Xianbao Wang, Aihua Chen, Fei He
BACKGROUND/AIMS: The present study aimed to detect the expression of miR-449a and investigate the effect of miR-449a on cell injury in cardiomyocytes subjected to hypoxia/ reoxygenation (H/R) and its underlying mechanisms. METHODS: The expression of miR-449a was determined using reverse transcription-polymerase chain reaction in both neonatal rat ventricular myocytes and H9C2 cells. For gain-of-function and loss-of-function studies, H9C2 cells were transfected with either miR-449a mimics or miR-449a inhibitor...
May 7, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29757019/optical-coherence-tomography-angiography-in-glaucoma-care
#5
Sunee Chansangpetch, Shan C Lin
Rapid improvements in optical coherence tomography (OCT) technology have allowed for enhancement of both image resolution and scanning speed, and the development of vascular assessment modality. Optical coherence tomography angiography (OCTA) is the non-invasive in vivo imaging of the vasculature located within the retina and optic nerve head area. The principle of OCTA is to use the variations in OCT signals caused by moving particles as the contrast mechanism for imaging of flow. Several algorithms which aim to maximize the contrast signal and minimize the noise have been developed including the phase-based techniques, intensity-based techniques (e...
May 14, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29754713/endoscopic-partial-arytenoidectomy-for-bilateral-vocal-fold-paralysis-medially-based-mucosal-flap-technique
#6
Taner Yılmaz
PURPOSE: Endoscopic partial arytenoidectomy (EPA) is one of the static operations for treatment of bilateral vocal fold paralysis (BVFP). Improvement in airway may cause voice loss and aspiration. The author reports his experience on EPA using medially based mucosal flap to enlarge posterior glottis without removing any part of membranous vocal fold. MATERIALS AND METHODS: Sixty-four consecutive patients with BVFP underwent EPA. Pre- and postoperative evaluations included Voice Handicap Index-30, aerodynamic and acoustic analysis, flow volume loops, perceptual evaluation of pre- and postoperative voice using grade, roughness, breathiness, asthenia, strain (GRBAS) scale, speech intensity, breathing ability evaluation, and functional outcome swallowing scale...
May 10, 2018: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/29716853/fermentation-of-aristolochia-debilis-by-six-different-medicinal-fungi-and-identification-of-aristolochic-acid-derivates-in-their-products-by-hplc-esi-tof-ms
#7
Xuexiang Liu, Jing Cao, Yang Pan, Xian Zhang
To analyze the content change of the nephrotoxic substances, aristolochic acid derivates (AAs) in the roots of Aristolochia debilis and the products generated from the solid-state fermentation of six different medicinal fungi by HPLC-ESI-TOF-MS, the chromatographic separation was carried out on C18 column at 30°C with the DAD detector. The elution was performed using the mobile phase of acetonitrile (A) and 0.2% acetic acid (B). Several new peaks were found in the scale of 0-20 min elution of HPLC diagram in the fermentation products...
May 2018: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29713227/two-small-intravenous-catheters-for-high-rate-contrast-medium-injection-for-computed-tomography-in-patients-lacking-superficial-veins-to-accommodate-a-large-catheter
#8
Bum Gu Son, Min Jung Kim, Myeung Hwa Park, Kyoungsook Kim, Jiyu Kim, Se-Young Kim, Kyung Jin Lee, Sang Hyun Choi, Ah Young Kim, Seong Ho Park
Objective: To prospectively investigate the feasibility of using 2 small intravenous catheters for high-rate computed tomography (CT) contrast injection in patients lacking superficial veins capable of accommodating ≤ 20-gauge catheters. Materials and Methods: Sixty-eight consecutive eligible adults referred for dynamic liver CT were enrolled; 58 had previously undergone liver CT, including 8 that experienced extravasation. Two 22- or 24-gauge catheters were placed in all patients after 2-5 venipunctures, and 2 mL/kg of contrast agent (370 mg I/mL) was split-administered through both catheters to achieve total flow rate of 4 mL/s...
May 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29703937/a-photochemical-diode-artificial-photosynthesis-system-for-unassisted-high-efficiency-overall-pure-water-splitting
#9
Faqrul A Chowdhury, Michel L Trudeau, Hong Guo, Zetian Mi
The conversion of solar energy into chemical fuels can potentially address many of the energy and environment related challenges we face today. In this study, we have demonstrated a photochemical diode artificial photosynthesis system that can enable efficient, unassisted overall pure water splitting without using any sacrificial reagent. By precisely controlling charge carrier flow at the nanoscale, the wafer-level photochemical diode arrays exhibited solar-to-hydrogen efficiency ~3.3% in neutral (pH ~ 7...
April 27, 2018: Nature Communications
https://www.readbyqxmd.com/read/29689548/nestin-improves-preeclampsia-like-symptoms-by-inhibiting-activity-of-cyclin-dependent-kinase-5
#10
Xu Yang, Yiling Ding, Mengyuan Yang, Ling Yu, Yun Hu, Yali Deng
BACKGROUND/AIMS: Preeclampsia (PE) is a pregnancy-specific hypertensive disorder that is characterised by a high incidence of hypertension and proteinuria. Podocytes are involved in the formation of a split membrane, which is the last barrier preventing the leakage of protein into the urine. Nestin, a cytoskeleton protein, is expressed stably in podocytes. However, the association between the Nestin concentration in urine and the progression of PE and the role of Nestin in PE remains unclear...
April 19, 2018: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29684059/supervised-machine-learning-reveals-introgressed-loci-in-the-genomes-of-drosophila-simulans-and-d-sechellia
#11
Daniel R Schrider, Julien Ayroles, Daniel R Matute, Andrew D Kern
Hybridization and gene flow between species appears to be common. Even though it is clear that hybridization is widespread across all surveyed taxonomic groups, the magnitude and consequences of introgression are still largely unknown. Thus it is crucial to develop the statistical machinery required to uncover which genomic regions have recently acquired haplotypes via introgression from a sister population. We developed a novel machine learning framework, called FILET (Finding Introgressed Loci via Extra-Trees) capable of revealing genomic introgression with far greater power than competing methods...
April 23, 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29680310/vocal-fold-contact-patterns-based-on-normal-modes-of-vibration
#12
Simeon L Smith, Ingo R Titze
The fluid-structure interaction and energy transfer from respiratory airflow to self-sustained vocal fold oscillation continues to be a topic of interest in vocal fold research. Vocal fold vibration is driven by pressures on the vocal fold surface, which are determined by the shape of the glottis and the contact between vocal folds. Characterization of three-dimensional glottal shapes and contact patterns can lead to increased understanding of normal and abnormal physiology of the voice, as well as to development of improved vocal fold models, but a large inventory of shapes has not been directly studied previously...
April 12, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29675207/a-practical-organic-mediated-hybrid-electrolyser-that-decouples-hydrogen-production-at-high-current-densities
#13
Niall Kirkaldy, Greig Chisholm, Jia-Jia Chen, Leroy Cronin
Hydrogen is seen as a sustainable fuel of the future, yet the vast majority of global hydrogen production comes from the reformation of fossil fuels. Electrolytic water splitting using proton exchange membrane electrolysers (PEMEs) provides a pathway to sustainable hydrogen production through coupling to renewable energy sources, but can suffer from gas crossover at low current densities and high operating pressures, causing explosive gas mixtures and decreasing cell lifetimes. Here we demonstrate the application of a highly stable, organic electron-coupled proton buffer (ECPB) which allows the decoupling of hydrogen and oxygen production during water splitting...
February 14, 2018: Chemical Science
https://www.readbyqxmd.com/read/29673764/mathematical-modeling-of-full-feed-depletion-split-flow-lateral-transport-thin-self-adjustable-channels-ffd-splitt-sa
#14
Albert Szparaga, Tomasz Kowalkowski, Bogusław Buszewski
The article contains a description of both the mathematical modeling of particles separation in self-adjustable channel for Split Flow Thin Cell Fractionation (SPLITT), and the channel design concept. The channel is designed to work in full feed depletion mode (FFD-SPLITT). By using different diameters of outlets, the channel has the ability to self-adjust the flow rates at the outlets. Moreover, in order to increase the throughput of the sample only one splitter, positioned at the end of the separation cell, was used...
March 23, 2018: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29667357/revealing-the-double-edged-sword-role-of-graphene-on-boosted-charge-transfer-versus-active-site-control-in-tio-2-nanotube-arrays-rgo-mos-2-heterostructure
#15
Quan Quan, Shunji Xie, Bo Weng, Ye Wang, Yi-Jun Xu
Charge separation/transfer is generally believed to be the most key factor affecting the efficiency of photocatalysis, which however will be counteracted if not taking the active site engineering into account for a specific photoredox reaction. Here, a 3D heterostructure composite is designed consisting of MoS2 nanoplatelets decorated on reduced graphene oxide-wrapped TiO2 nanotube arrays (TNTAs@RGO/MoS2 ). Such a cascade configuration renders a directional migration of charge carriers and controlled immobilization of active sites, thereby showing much higher photoactivity for water splitting to H2 than binary TNTAs@RGO and TNTAs/MoS2 ...
April 18, 2018: Small
https://www.readbyqxmd.com/read/29664669/primary-nonsecretory-plasma-cell-leukemia-with-multiple-chromosomal-abnormalities-a-case-report
#16
Satoshi Nakayama, Tomohiro Oda, Shinya Minabe, Yukiharu Bamba, Haruko Ukawa, Rika Sato, Masaki Kawabata, Toshikatsu Horiuchi, Junichi Watanabe, Fumihiko Kimura, Hideyuki Shimazaki, Sho Ogata, Kuniaki Nakanishi
Primary nonsecretory plasma cell leukemia (PCL) is an extremely rare type of multiple myeloma. Here, we report a case of nonsecretory PCL with no previous history of multiple myeloma. The case exhibited extremely low levels of serum immunoglobulin and light chain, no detectable serum M-protein or free light chain restriction, no urine BJP, and no cytoplasmic light chain expression in flow cytometry. In fluorescence in situ hybridization, tumor cells exhibited fusion genes for IgH/BCL1 and IgH/cMyc, disappearance of the p53 signal, and a split signal for IgK(2p11), but no split signal for IgL (22q11)...
January 1, 2018: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/29656284/findings-of-optical-coherence-tomography-angiography-in-best-vitelliform-macular-dystrophy
#17
Xiao Na Wang, Qi Sheng You, Qian Li, Yang Li, Yu Mao, Feng Hu, Hui Ying Zhao, Frank F Tsai, Xiao Yan Peng
PURPOSE: To evaluate the vascular anatomy of eyes with Best vitelliform macular dystrophy (BVMD) using optical coherence tomography angiography (OCTA). METHODS: This retrospective case-control study enrolled 11 consecutive BVMD patients and 13 age-matched healthy participants. Both eyes of each participant were imaged using a macular OCTA scan (3 × 3 mm) by 70-kHz 840-nm spectral-domain OCT. The flow signal was calculated using the split-spectrum amplitude-decorrelation angiography (SSADA) algorithm...
April 13, 2018: Ophthalmic Research
https://www.readbyqxmd.com/read/29653389/how-does-the-microbial-load-affect-the-quality-of-equine-cool-stored-semen
#18
E Varela, J Rey, E Plaza, P Muñoz de Propios, J M Ortiz-Rodríguez, M Álvarez, L Anel-López, L Anel, P De Paz, M C Gil, J M Morrell, C Ortega-Ferrusola
Contaminating bacteria present in stallion ejaculates may compromise sperm quality during storage. Different procedures have been used to reduce the load of microorganisms in semen and avoid bacterial growth during storage. The aims of this study were: 1) to evaluate different techniques to eliminate bacteria in semen 2) to study the relationship between total microflora load (TML) and ROS production; and 3) to determine if TML affects the functionality of cool-stored sperm. Ejaculates from 11 stallions were split and processed in 3 ways: A...
March 26, 2018: Theriogenology
https://www.readbyqxmd.com/read/29644030/proof-of-concept-liver-splitting-during-normothermic-machine-perfusion
#19
Barney T F Stephenson, Glenn K Bonney, Richard W Laing, Ricky H Bhogal, Francesca Marcon, Desley A H Neil, M Thamara P R Perera, Simon C Afford, Hynek Mergental, Darius F Mirza
Introduction: Despite utilizing extended criteria donors, there remains a shortage of livers for transplantation. No data exists on splitting donor livers with concurrent NMP-L. Methods: A liver recovered from a donor after circulatory death was subjected to NMP-L using a red cell based fluid. During NMP-L, a 'classical' left lateral + right trisegmentectomy split was performed using an integrated bipolar/ultrasonic device. After splitting, blood flow was confirmed using Doppler ultrasound in each lobe...
March 2018: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/29625293/modelling-of-an-anaerobic-plug-flow-reactor-process-analysis-and-evaluation-approaches-with-non-ideal-mixing-considerations
#20
Andrés Donoso-Bravo, Constanza Sadino-Riquelme, Daniel Gómez, Camilo Segura, Emky Valdebenito, Felipe Hansen
This study shows the implementation of the Anaerobic Digestion Model (ADM1) in an anaerobic plug-flow reactor (PFR) with two approaches based on the use of consecutive continuous stirred tank reactors (CSTR) connected in serie for considering non-ideal mixing. The two-region (TR) model splits each CSTR into two regions, while the particulate retention (PR) model adds a retention parameter. The models were calibrated and validated based on experimental data from a bench-scale reactor treating cow manure. The PFR conventional model slightly outperformed the non-ideal mixing approaches...
March 29, 2018: Bioresource Technology
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