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https://www.readbyqxmd.com/read/28631472/phosphate-shifted-oxygen-reduction-pathway-on-fe-fe2o3-core-shell-nanowires-for-enhanced-reactive-oxygen-species-generation-and-aerobic-4-chlorophenol-degradation
#1
Yi Mu, Zhihui Ai, Lizhi Zhang
Phosphate ions widely exist in the environment. Previous studies revealed that the adsorption of phosphate ions on nanoscale zero-valent iron would generate a passivating oxide shell to block reactive sites and thus decrease the direct pollutant reduction reactivity of zero-valent iron. Given that molecular oxygen activation process is different from direct pollutant reduction with nanoscale zero-valent iron, it is still unclear how phosphate ions will affect molecular oxygen activation and reactive oxygen species generation with nanoscale zero-valent iron...
June 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28625256/-comparison-of-effect-of-norepinephrine-and-terlipressin-on-patients-with-ards-combined-with-septic-shock-a-prospective-single-blind-randomized-controlled-trial
#2
Zhi Chen, Ping Zhou, Yuanhua Lu, Chunli Yang
OBJECTIVE: To approach the effect of different vasopressor on hemodynamics, volume responsiveness, fluid volume balance, renal function and prognosis in patients with acute respiratory distress syndrome (ARDS) complicated with septic shock. METHODS: A prospective single-blind randomized controlled trial was conducted. ARDS patients with septic shock admitted to the Department of Critical Care Medicine of Jiangxi Provincial People's Hospital from January 1st, 2015 to May 1st, 2016 were enrolled...
February 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28617689/paracellular-transport-and-energy-utilization-in-the-renal-tubule
#3
Alan S L Yu
PURPOSE OF REVIEW: Paracellular transport across the tight junction is a general mechanism for transepithelial transport of solutes in epithelia, including the renal tubule. However, why paracellular transport evolved, given the existence of a highly versatile system for transcellular transport, is unknown. RECENT FINDINGS: Recent studies have identified the paracellular channel, claudin-2, that is responsible for paracellular reabsorption of sodium in the proximal renal tubule...
June 14, 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/28601340/pilot-scale-evaluation-of-semi-passive-treatment-technologies-for-the-treatment-of-septage-under-temperate-climate-conditions
#4
Christine Gan, Pascale Champagne, Geof Hall
Population growth in rural Canada has resulted in an increase in municipal septage generation, which could overload existing treatment facilities that rely on biological treatment approaches. To address concerns associated with potential shock loading of these systems, three semi-passive wastewater treatment technologies were compared at the pilot-scale to identify a suitable approach to augment the capacity of an existing wastewater stabilization pond facility in rural Ontario. Two of these technologies, the BioDome and BioCord systems, were commercially available systems that make use of biofilm technology to improve treatment performance and enhance the robustness to temperature and hydraulic loading fluctuations...
June 7, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28599393/hepar-uterinum-a-history-of-ideas-on-fetal-nutrition
#5
Michael Obladen
The means of fetal nutrition has been debated for over two millennia, with the controversy of oral versus parenteral nutrition already in the Corpus Hippocraticum. In 1587 Aranzio rejected connections between maternal and fetal blood vessels, and coined the term "hepar uterinum" for the placenta. From the 16th to the 18th century, a fervent debate focused on the type and extent of connection between maternal and fetal vessels, which was finally settled by Hunter's injection experiment in 1774. But up to the middle of the 19th century, an important nutritive function was attributed to amniotic fluid...
May 24, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28570491/effects-of-a-6-week-upper-extremity-low-volume-high-intensity-interval-training-on-oxygen-uptake-peak-power-output-and-total-exercise-time
#6
Nicole Pinto, James W Salassi, Ayla Donlin, Jan Schroeder, Ralph Rozenek
The purpose of this study was to compare the effects of upper extremity (UE) high intensity interval training (HIIT) to UE continuous training (CT) when training at a similar intensity. 20 participants (mean age = 23 ± 3 yrs) were randomly assigned to either a HIIT (n = 10) or CT (n = 10) group. Participants completed a graded exercise test utilizing arm cranking prior to and following 6 wks (2 sessions · wk-1) of UE training. During sessions, HIIT performed 10 repetitions of 60 s of work at 92.3 ± 1.0% of the arm HRpeak (%aHRpeak) and 60 s of passive recovery (%aHRpeak = 73...
May 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28559752/clinical-validation-of-pain-management-manipulative-therapy-for-knee-osteoarthritis-with-the-squeeze-hold-technique-a-case-series
#7
Masaaki Nakajima
OBJECTIVE: The purpose of this case series was to describe the short-term and long-term clinical effects of a manual technique for treating osteoarthritis (OA) knee pain. METHODS: This study measured of the immediate effect and long-term effect by using a case series of different groups of subjects. Knee OA and activity restriction in patients were evaluated by using the Kellgren-Lawrence (K/L) Grading Scale and the Japanese Knee Osteoarthritis Measure (JKOM) index...
June 2017: Journal of Chiropractic Medicine
https://www.readbyqxmd.com/read/28553198/a-resilient-non-neuronal-source-of-the-spatiotemporal-lag-structure-detected-by-bold-signal-based-blood-flow-tracking
#8
Toshihiko Aso, Guanhua Jiang, Shin-Ichi Urayama, Hidenao Fukuyama
Recent evidence has suggested that blood oxygenation level-dependent (BOLD) signals convey information about brain circulation via low frequency oscillation of systemic origin (sLFO) that travels through the vascular structure ("lag mapping"). Prompted by its promising application in both physiology and pathology, we examined this signal component using multiple approaches. A total of 30 healthy volunteers were recruited to perform two reproducibility experiments at 3 Tesla using multiband echo planar imaging...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28545257/the-reactive-sulfur-species-concept-15-years-on
#9
REVIEW
Gregory I Giles, Muhammad Jawad Nasim, Wesam Ali, Claus Jacob
Fifteen years ago, in 2001, the concept of "Reactive Sulfur Species" or RSS was advocated as a working hypothesis. Since then various organic as well as inorganic RSS have attracted considerable interest and stimulated many new and often unexpected avenues in research and product development. During this time, it has become apparent that molecules with sulfur-containing functional groups are not just the passive "victims" of oxidative stress or simple conveyors of signals in cells, but can also be stressors in their own right, with pivotal roles in cellular function and homeostasis...
May 23, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28544324/albumin-templated-manganese-dioxide-nanoparticles-for-enhanced-radioisotope-therapy
#10
Longlong Tian, Qian Chen, Xuan Yi, Jiawen Chen, Chao Liang, Yu Chao, Kai Yang, Zhuang Liu
Although nanoparticle-based drug delivery systems have been widely explored for tumor-targeted delivery of radioisotope therapy (RIT), the hypoxia zones of tumors on one hand can hardly be reached by nanoparticles with relatively large sizes due to their limited intratumoral diffusion ability, on the other hand often exhibit hypoxia-associated resistance to radiation-induced cell damage. To improve RIT treatment of solid tumors, herein, radionuclide (131) I labeled human serum albumin (HSA)-bound manganese dioxide nanoparticles ((131) I-HSA-MnO2 ) are developed as a novel RIT nanomedicine platform that is responsive to the tumor microenvironment (TME)...
May 19, 2017: Small
https://www.readbyqxmd.com/read/28536944/fluid-responsiveness-predicted-by-transcutaneous-partial-pressure-of-oxygen-in-patients-with-circulatory-failure-a-prospective-study
#11
Jingyuan Xu, Xiao Peng, Chun Pan, Shixia Cai, Xiwen Zhang, Ming Xue, Yi Yang, Haibo Qiu
BACKGROUND: Significant effort has been devoted to defining parameters for predicting fluid responsiveness. Our goal was to study the feasibility of predicting fluid responsiveness by transcutaneous partial pressure of oxygen (PtcO2) in the critically ill patients. METHODS: This was a single-center prospective study conducted in the intensive care unit of a tertiary care teaching hospital. Shock patients who presented with at least one clinical sign of inadequate tissue perfusion, defined as systolic blood pressure <90 mmHg or a decrease >40 mmHg in previously hypertensive patients or the need for vasopressive drugs; urine output <0...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28530505/ingestion-of-sodium-bicarbonate-nahco3-following-a-fatiguing-bout-of-exercise-accelerates-post-exercise-acid-base-balance-recovery-and-improves-subsequent-high-intensity-cycling-time-to-exhaustion
#12
Lewis A Gough, Steven Rimmer, Callum J Osler, Matthew F Higgins
This study evaluated the ingestion of sodium bicarbonate (NaHCO3) on post-exercise acid-base balance recovery kinetics and subsequent high-intensity cycling time to exhaustion. In a counterbalanced, crossover design, nine healthy and active males (age: 23±2 years, height: 179±5 cm, body mass: 74±9 kg, peak mean minute power (WPEAK) 256±45 W, peak oxygen uptake (V̇O2PEAK) 46±8 ml.kg(-1).min(-1)) performed a graded incremental exercise test, two familiarisation and two experimental trials. Experimental trials consisted of cycling to volitional exhaustion (TLIM1) at 100% WPEAK on two occasions (TLIM1 and TLIM2) interspersed by a 90 min passive recovery period...
May 22, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28522412/athero-inflammatory-nanotherapeutics-ferulic-acid-based-poly-anhydride-ester-nanoparticles-attenuate-foam-cell-formation-by-regulating-macrophage-lipogenesis-and-reactive-oxygen-species-generation
#13
Rebecca A Chmielowski, Dalia S Abdelhamid, Jonathan J Faig, Latrisha K Petersen, Carol R Gardner, Kathryn E Uhrich, Laurie B Joseph, Prabhas V Moghe
Enhanced bioactive anti-oxidant formulations are critical for treatment of inflammatory diseases, such as atherosclerosis. A hallmark of early atherosclerosis is the uptake of oxidized low density lipoprotein (oxLDL) by macrophages, which results in foam cell and plaque formation in the arterial wall. The hypolipidemic, anti-inflammatory, and antioxidative properties of polyphenol compounds make them attractive targets for treatment of atherosclerosis. However, high concentrations of antioxidants can reverse their anti-atheroprotective properties and cause oxidative stress within the artery...
May 15, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28497686/enhancing-the-durability-and-carrier-selectivity-of-perovskite-solar-cells-using-a-blend-interlayer
#14
Dong Hun Sin, Sae Byeok Jo, Seung Goo Lee, Hyomin Ko, Min Kim, Hansol Lee, Kilwon Cho
A mechanically and thermally stable and electron-selective ZnO/CH3NH3PbI3 interface is created via hybridization of a polar insulating polymer, poly(ethylene glycol) (PEG), into ZnO nanoparticles (NPs). PEG successfully passivates the oxygen defects on ZnO and prevents direct contact between CH3NH3PbI3 and defects on ZnO. A uniform CH3NH3PbI3 film is formed on a soft ZnO:PEG layer after dispersion of the residual stress from the volume expansion during CH3NH3PbI3 conversion. PEG also increases the work of adhesion of the CH3NH3PbI3 film on the ZnO:PEG layer and holds the CH3NH3PbI3 film with hydrogen bonding...
May 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28492235/fast-oxygen-diffusion-and-iodide-defects-mediate-oxygen-induced-degradation-of-perovskite-solar-cells
#15
Nicholas Aristidou, Christopher Eames, Irene Sanchez-Molina, Xiangnan Bu, Jan Kosco, M Saiful Islam, Saif A Haque
Methylammonium lead halide perovskites are attracting intense interest as promising materials for next-generation solar cells, but serious issues related to long-term stability need to be addressed. Perovskite films based on CH3NH3PbI3 undergo rapid degradation when exposed to oxygen and light. Here, we report mechanistic insights into this oxygen-induced photodegradation from a range of experimental and computational techniques. We find fast oxygen diffusion into CH3NH3PbI3 films is accompanied by photo-induced formation of highly reactive superoxide species...
May 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/28488323/phenol-catalyzed-discharge-in-the-aprotic-lithium-oxygen-battery
#16
Xiangwen Gao, Zarko P Jovanov, Yuhui Chen, Lee R Johnson, Peter G Bruce
Discharge in the lithium-O2 battery is known to occur either by a solution mechanism, which enables high capacity and rates, or a surface mechanism, which passivates the electrode surface and limits performance. The development of strategies to promote solution-phase discharge in stable electrolyte solutions is a central challenge for development of the lithium-O2 battery. Here we show that the introduction of the protic additive phenol to ethers can promote a solution-phase discharge mechanism. Phenol acts as a phase-transfer catalyst, dissolving the product Li2 O2 , avoiding electrode passivation and forming large particles of Li2 O2 product-vital requirements for high performance...
June 1, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28488137/acute-effects-of-high-intensity-interval-training-and-moderate-intensity-continuous-training-sessions-on-cardiorespiratory-parameters-in-healthy-young-men
#17
Gustavo Zaccaria Schaun, Cristine Lima Alberton, Diego Oliveira Ribeiro, Stephanie Santana Pinto
PURPOSE: The aim of the present study was to compare the energy expenditure (EE) during and after two treadmill protocols, high-intensity interval training (HIIT) and moderate continuous training (CONT), in young adult men. METHODS: The sample was comprised by 26 physically active men aged between 18 and 35 years engaged in aerobic training programs. They were divided into two groups: HIIT (n = 14) which performed eight 20 s bouts at 130% of the velocity associated with the maximal oxygen consumption on a treadmill with 10 s of passive rest, or CONT (n = 12) which performed 30 min running on a treadmill at a submaximal velocity equivalent to 90-95% of the heart rate associated with the anaerobic threshold...
May 9, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28486506/an-fmri-study-into-emotional-processing-in-parkinson-s-disease-does-increased-medial-prefrontal-activation-compensate-for-striatal-dysfunction
#18
Anja J H Moonen, Peter H Weiss, Michael Wiesing, Ralph Weidner, Gereon R Fink, Jennifer S A M Reijnders, Wim M Weber, Albert F G Leentjens
BACKGROUND: Apart from a progressive decline of motor functions, Parkinson's disease (PD) is also characterized by non-motor symptoms, including disturbed processing of emotions. This study aims at assessing emotional processing and its neurobiological correlates in PD with the focus on how medicated Parkinson patients may achieve normal emotional responsiveness despite basal ganglia dysfunction. METHODS: Nineteen medicated patients with mild to moderate PD (without dementia or depression) and 19 matched healthy controls passively viewed positive, negative, and neutral pictures in an event-related blood oxygen level-dependent functional magnetic resonance imaging study (BOLD-fMRI)...
2017: PloS One
https://www.readbyqxmd.com/read/28482456/antibiotic-resistance-genes-in-municipal-wastewater-treatment-systems-and-receiving-waters-in-arctic-canada
#19
Kara D Neudorf, Yan Nan Huang, Colin M Ragush, Christopher K Yost, Rob C Jamieson, Lisbeth Truelstrup Hansen
Domestic wastewater discharges may adversely impact arctic ecosystems and local indigenous people, who rely on being able to hunt and harvest food from their local environment. Therefore, there is a need to develop efficient wastewater treatment plants (WWTPs), which can be operated in remote communities under extreme climatic conditions. WWTPs have been identified as reservoirs of antibiotic resistance genes (ARGs). The objective of this work was to quantify the presence of nine different ARG markers (int1, sul1, sul2, tet(O), erm(B), mecA, blaCTX-M, blaTEM, and qnr(S)) in two passive systems (waste stabilization ponds [WSPs]) and one mechanical filtration plant operating in two smaller and one large community, respectively, in Nunavut, Canada...
November 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28476082/surface-passivation-of-silicon-using-hfo2-thin-films-deposited-by-remote-plasma-atomic-layer-deposition-system
#20
Xiao-Ying Zhang, Chia-Hsun Hsu, Shui-Yang Lien, Song-Yan Chen, Wei Huang, Chih-Hsiang Yang, Chung-Yuan Kung, Wen-Zhang Zhu, Fei-Bing Xiong, Xian-Guo Meng
Hafnium oxide (HfO2) thin films have attracted much attention owing to their usefulness in equivalent oxide thickness scaling in microelectronics, which arises from their high dielectric constant and thermodynamic stability with silicon. However, the surface passivation properties of such films, particularly on crystalline silicon (c-Si), have rarely been reported upon. In this study, the HfO2 thin films were deposited on c-Si substrates with and without oxygen plasma pretreatments, using a remote plasma atomic layer deposition system...
December 2017: Nanoscale Research Letters
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