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https://www.readbyqxmd.com/read/29677731/new-insights-into-mechanism-of-surface-reactions-of-zno-nanorods-during-electrons-beam-irradiation
#1
Youngseung Cho, Hyunjin Ji, Hyoungsub Kim, Jinsuop Yoon, Byoungdeog Choi
This study provides new insight into mechanisms of ionic reactions on the surface of ZnO nanorod networks, which could result in enhanced performance in optical or molecular sensors. The current- voltage characteristics of ZnO nanorod network devices exhibit typical nonlinear behavior in air, which implies the formation of a Schottky barrier when metals are used as contacts. The conductance of the device increased significantly in vacuum, which can be explained by the desorption of hydroxyl groups at very low pressure...
September 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29659573/whole-body-iron-transport-and-metabolism-mechanistic-multi-scale-model-to-improve-treatment-of-anemia-in-chronic-kidney-disease
#2
Joydeep Sarkar, Alka A Potdar, Gerald M Saidel
Iron plays vital roles in the human body including enzymatic processes, oxygen-transport via hemoglobin and immune response. Iron metabolism is characterized by ~95% recycling and minor replenishment through diet. Anemia of chronic kidney disease (CKD) is characterized by a lack of synthesis of erythropoietin leading to reduced red blood cell (RBC) formation and aberrant iron recycling. Treatment of CKD anemia aims to normalize RBC count and serum hemoglobin. Clinically, the various fluxes of iron transport and accumulation are not measured so that changes during disease (e...
April 16, 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29656253/disposal-of-olive-mill-wastewater-with-dc-arc-plasma-method
#3
Beycan Ibrahimoglu, M Zeki Yilmazoglu
Olive mill wastewater is an industrial waste, generated as a byproduct of olive oil production process and generally contains components such as organic matter, suspended solids, oil, and grease. Although various methods have been developed to achieve the disposal of this industrial wastewater, due to the low cost, the most common disposal application is the passive storage in the lagoons. The main objective of this study is to reduce pollution parameters in olive mill wastewater and draw water to discharge limits by using plasma technology...
April 12, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29652517/angiotensin-1-7-attenuated-cigarette-smoking-related-pulmonary-fibrosis-via-improving-the-impaired-autophagy-caused-by-nox4-dependent-ros
#4
Miaoxia Pan, Zemao Zheng, Yan Chen, Nana Sun, Bojun Zheng, Qianjie Yang, Yue Zhang, Xu Li, Ying Meng
Cigarette smoking is acknowledged as the major risk factor of pulmonary fibrosis. Angiotensin II (Ang II) has been reported to aggravate the smoking-induced lung fibrosis, whereas the effect of angiotensin-(1-7) (Ang-(1-7)) on smoking-related lung fibrosis remains unknown. The autophagy, being activated by reactive oxygen species (ROS), is identified as a novel mechanism of pulmonary fibrosis. However, whether autophagy involves in regulation of smoking-induced lung fibrosis still needs investigation. Here, we aim to investigate the effect of Ang-(1-7) on smoking-related lung fibrosis by the regulation of autophagy and ROS...
April 13, 2018: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/29648891/muscular-and-vascular-issues-induced-by-prolonged-standing-with-different-work-rest-cycles-with-active-or-passive-breaks
#5
Maria-Gabriela Garcia, Thomas Läubli, Bernard J Martin
OBJECTIVE: The aim of this study was to evaluate the long-lasting motor, behavioral, physiological, and perceptual effects of prolonged standing work in three work-rest cycle conditions including passive or active rest breaks. BACKGROUND: Muscle fatigue has been evidenced after prolonged standing work through physiological and neuromotor measures. It has been postulated that muscle fatigue induced by prolonged work could be attenuated by appropriate scheduling of work and rest periods...
April 1, 2018: Human Factors
https://www.readbyqxmd.com/read/29642708/coronary-artery-development-origin-malformations-and-translational-vascular-reparative-therapy
#6
Daryl Ramai, Jonathan Lai, Constantine Monzidelis, Sarath Reddy
After thickening of the cardiac chamber walls during embryogenesis, oxygen and nutrients can no longer be adequately supplied to cardiac cells via passive diffusion; therefore, a primitive vascular network develops to supply these vital structures. This plexus further matures into coronary arteries and veins, which ensures continued development of the heart. Various models have been proposed to account for the growth of the coronary arteries. However, lineage-tracing studies in the last decade have identified 3 major sources, namely, the proepicardium, the sinus venosus, and endocardium...
January 1, 2018: Journal of Cardiovascular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29620877/a-family-of-rhodium-complexes-with-selective-toxicity-towards-mismatch-repair-deficient-cancers
#7
Kelsey M Boyle, Jacqueline K Barton
Rhodium metalloinsertors are a unique set of metal complexes that bind specifically to DNA base pair mismatches in vitro and kill mismatch repair (MMR)-deficient cells at lower concentrations than their MMR-proficient counterparts. A family of metalloinsertors containing rhodium-oxygen ligand coordination, termed "Rh-O" metalloinsertors, has been prepared and shown to have a significant increase in both overall potency and selectivity towards MMR-deficient cells regardless of structural changes in the ancillary ligands...
April 5, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29616211/granulated-bog-iron-ores-as-sorbents-in-passive-bio-remediation-systems-for-arsenic-removal
#8
Klaudia Debiec, Grzegorz Rzepa, Tomasz Bajda, Witold Uhrynowski, Aleksandra Sklodowska, Jan Krzysztoforski, Lukasz Drewniak
The main element of PbRS (passive (bio)remediation systems) are sorbents, which act as natural filters retaining heavy metals and carriers of microorganisms involved in water treatment. Thus, the effectiveness of PbRS is determined by the quality of the (ad)sorbents, which should be stable under various environmental conditions, have a wide range of applications and be non-toxic to (micro)organisms used in these systems. Our previous studies showed that bog iron ores (BIOs) meet these requirements. However, further investigation of the physical and chemical parameters of BIOs under environmental conditions is required before their large-scale application in PbRS...
2018: Frontiers in Chemistry
https://www.readbyqxmd.com/read/29608854/interface-engineering-and-its-effect-on-wo3-based-photoanode-and-tandem-cell
#9
Yang Liu, Bryan R Wygant, Oluwaniyi Mabayoje, Jie Lin, Kenta Kawashima, Jun-Hyuk Kim, Wenzhang Li, Jie Li, C Buddie Mullins
During photoelectrochemical (PEC) water splitting, the reactions occur on the surface of the photoelectrode. Therefore, the properties of the interfaces between the various components of the electrode (semiconductor/semiconductor, semiconductor/catalyst, or photoelectrode/electrolyte) affect the PEC performance of the composite material. Notably, surface trap states may hinder charge transfer and transport properties, and also cause Fermi pinning, affecting the quasi-Fermi level and onset potential under illumination, which may in turn influence the PEC performance of the corresponding tandem cells...
April 2, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29590559/decreased-prefrontal-oxygenation-elicited-by-stimulation-of-limb-mechanosensitive-afferents-during-cycling-exercise
#10
Ryota Asahara, Kanji Matsukawa
Our laboratory reported using near-infrared spectroscopy that feedback from limb mechanoafferents may decrease prefrontal oxygenated-hemoglobin concentration (Oxy-Hb) during the late period of voluntary and passive cycling. To test the hypothesis that the decreased Oxy-Hb of the prefrontal cortex would be augmented depending on the extent of limb mechanoafferent input, the prefrontal Oxy-Hb response was measured during motor-driven one- and two-legged passive cycling for 1 min at various revolutions of pedal movement in 19 subjects...
March 28, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29588217/a-review-of-nanoparticle-photosensitizer-drug-delivery-uptake-systems-for-photodynamic-treatment-of-lung-cancer
#11
REVIEW
Mokwena Mpho Gift, Kruger Cherie Ann, Mfouo-Tynga Ivan, Abrahamse Heidi
Lung cancer is a leading cause of cancer related deaths worldwide and so current research is focused on trying to improve treatment modalities, such as photodynamic therapy (PDT). PDT has 3 fundamental factors, namely a photosensitizer (PS) drug, light and oxygen. When a PS drug is administered to a patient, it can either passively or actively accumulate within a tumour site and once exposed to a specific wavelength of light, it is stimulated to produce reactive oxygen species (ROS), resulting in tumour destruction...
March 24, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29583126/forming-free-performance-of-a-sinx-h-based-resistive-switching-memory-obtained-by-oxygen-plasma-treatment
#12
Xinxin Zhang, Zhongyuan Ma, Hui Zhang, Jian Liu, Huafeng Yang, Yang Sun, Dingwen Tan, Wei Li, Ling Xu, Kunji Chen, Duan Feng
An a-SiNx-based resistive random access memory (RRAM) device with a forming-free characteristic has significant potentials for the industrialization of the next-generation memories. We demonstrate that a forming-free a-SiNxOy RRAM device can be achieved by an oxygen plasma treatment of ultra-thin a-SiNx:H films. Electron spin resonance spectroscopy reveals that Si dangling bonds with a high density (1019 cm-3) are distributed in the initial state, which exist in the forms of 〖"Si" 〗_"2" "N≡Si∙" , "Si" "O" _"2" "≡Si∙" , "O" _"3" "≡Si∙" , and "N" _"3" "≡Si∙" ...
March 27, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29575904/degradation-chemistry-and-stabilization-of-exfoliated-few-layer-black-phosphorus-in-water
#13
Taiming Zhang, Yangyang Wan, Huanyu Xie, Yang Mu, Pingwu Du, Dong Wang, Xiaojun Wu, Hengxing Ji, Lijun Wan
Exfoliated black phosphorus (BP), as a monolayer or few-layer material, has attracted tremendous attentions owing to its unique physical properties for applications ranging from optoelectronics to photocatalytic hydrogen production. Approaching intrinsic properties has been, however, challenged by chemical reactions and structure degradation of BP in ambient conditions. Surface passivation by capping agents has been proposed to extend the processing time window, yet contamination or structure damage rise challenges for BP applications...
March 25, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29572856/the-relative-biological-effectiveness-for-carbon-nitrogen-and-oxygen-ion-beams-using-passive-and-scanning-techniques-evaluated-with-fully-3d-silicon-microdosimeters
#14
Linh T Tran, David Bolst, Susanna Guatelli, Alex Pogossov, Marco Petasecca, Michael L F Lerch, Lachlan Chartier, Dale A Prokopovich, Mark I Reinhard, Marco Povoli, Angela Kok, Vladimir L Perevertaylo, Naruhiro Matsufuji, Tatsuaki Kanai, Michael Jackson, Anatoly B Rosenfeld
BACKGROUND: The aim of this study was to measure the microdosimetric distributions of a carbon pencil-beam scanning (PBS) and passive scattering system as well as to evaluate the relative biological effectiveness (RBE) of different ions, namely12 C,14 N and16 O, using a silicon-on-insulator (SOI) microdosimeter with well-defined 3D sensitive volumes (SV). Geant4 simulations were performed with the same experimental setup and results were compared to the experimental results for benchmarking...
March 23, 2018: Medical Physics
https://www.readbyqxmd.com/read/29570596/quantifying-the-physical-response-to-a-contemporary-amateur-boxing-simulation
#15
Mitchell J Finlay, Matt Greig, Richard M Page
Finlay, MJ, Greig, M, and Page, RM. Quantifying the physical response to a contemporary amateur boxing simulation. J Strength Cond Res 32(4): 1005-1012, 2018-This study examined the physical response to a contemporary boxing-specific exercise protocol (BSEP), based on notational analysis of amateur boxing. Nine male senior elite amateur boxers completed a 3 × 3-minute BSEP, with a 1-minute passive recovery period interspersing each round. Average (HRave) and peak (HRpeak) heart rates, average (V[Combining Dot Above]O2ave) and peak oxygen consumptions (V[Combining Dot Above]O2peak), blood lactate (BLa) concentrations, rating of perceived exertion, and both triaxial and uniaxial PlayerLoad metrics were recorded during the completion of the BSEP...
April 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29569250/impact-of-upper-respiratory-tract-infections-on-perioperative-outcomes-of-children-undergoing-therapeutic-cardiac-catheterisation
#16
S Zhang, S Ding, M Cai, J Bai, M Zhang, Y Huang, J Zheng
BACKGROUND: Recent upper respiratory tract infection (URI) is associated with increased incidence of perioperative complications in children undergoing open heart surgery. As a result, surgery is often postponed. However, the effect of recent URI on the incidence of perioperative complications in children undergoing therapeutic cardiac catheterisation is unknown. We investigated the perioperative outcomes of congenital heart disease (CHD) children with recent URI who underwent elective therapeutic catheterisation...
March 22, 2018: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/29566344/diurnal-variation-in-repeated-sprint-performance-cannot-be-offset-when-rectal-and-muscle-temperatures-are-at-optimal-levels-38-5%C3%A2-c
#17
Samuel A Pullinger, Juha Oksa, Liam F Clark, Joe W F Guyatt, Antonia Newlove, Jatin G Burniston, Dominic A Doran, James M Waterhouse, Ben J Edwards
The present study investigated whether increasing morning rectal temperatures (Trec ) to evening levels, or increasing morning and evening Trec to an "optimal" level (38.5°C), resulting in increased muscle temperatures (Tm ), would offset diurnal variation in repeated sprint (RS) performance in a causal manner. Twelve trained males underwent five sessions [age (mean ± SD) 21.0 ± 2.3 years, maximal oxygen consumption (V̇O2 max) 60.0 ± 4.4 mL.kg-1  min-1 , height 1.79 ± 0.06 m, body mass 78...
March 22, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29563669/first-indian-initiative-for-preparation-of-low-titer-group-o-single-donor-platelets-with-platelet-additive-solution
#18
Puneet Jain, Anita Tendulkar, Abhaykumar Gupta
BACKGROUND: Guidelines recommend ABO-identical platelet (PLT) transfusions. Hemolytic reactions after a minor ABO-incompatible PLT transfusion have escalated due to single-donor platelets (SDP) containing ABO-incompatible plasma. Avoiding such events by examining titers or performing plasma reduction is cumbersome. The introduction of platelet additive solutions (PAS) has enabled to reduce these reactions by avoiding passive transfer of isoagglutinin. Our aim was to study antibody titers (anti-A, anti-B) in "O" SDP by adding PAS at source and the quality parameters with reference to viability, morphology, and metabolism...
January 2018: Asian Journal of Transfusion Science
https://www.readbyqxmd.com/read/29560974/captivation-with-encapsulation-a-dozen-years-of-exploring-uranyl-peroxide-capsules
#19
Peter C Burns, May Nyman
Uranyl peroxide clusters containing from 16 to 124 uranyl ions self-assemble in aqueous solution and exhibit tremendous topological complexity. Most of these clusters are cages, with the inside and outside surfaces passivated by oxygen atoms that are triply bonded to U(vi) cations (yl oxygen). It has become increasing apparent that the counter cations associated with these anionic cage clusters impact their assembly, topologies, and behavior in solution, including aggregation and aqueous solubility. Here we review the chemical compositions and topologies of uranyl peroxide clusters...
March 21, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29550927/cooperative-electrogenic-proton-transport-pathways-in-the-plasma-membrane-of-the-proton-secreting-osteoclast
#20
REVIEW
Miyuki Kuno
A proton is a ubiquitous signaling ion. Many transmembrane H+ transport pathways either maintain pH homeostasis or generate acidic compartments. The osteoclast is a bone-resorbing cell, which degrades bone tissues by secreting protons and lysosomal enzymes into the resorption pit. The plasma membrane facing bone tissue (ruffled border), generated partly by fusion of lysosomes, may mimic H+ flux mechanisms regulating acidic vesicles. We identified three electrogenic H+ -fluxes in osteoclast plasma membranes-a vacuolar H+ -ATPase (V-ATPase), a voltage-gated proton channel (Hv channel) and an acid-inducible H+ -leak-whose electrophysiological profiles and regulation mechanisms differed...
March 17, 2018: Pflügers Archiv: European Journal of Physiology
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