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https://www.readbyqxmd.com/read/29141358/-effect-of-different-tourniquet-releasing-strategy-on-blood-loss-in-total-knee-arthroplasty
#1
Y Li, M Lu, H Tian, Z J Li, K Zhang
Objective: To explore the influences on peri-operative blood loss and postoperative blood transfusion in primary total knee arthroplasty when using different methods to release the pneumatic tourniquet. Methods: From January 2015 to December 2016, 484 patients with osteoarthritis were enrolled, undergoing primary unilateral total knee arthroplasty in the Orthopedics Department of Peking University Third Hospital. Retrospective data was used, and all the patients had been operated on by three independent working groups...
November 7, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29141186/hyperbaric-oxygen-therapy-ameliorates-pathophysiology-of-3xtg-ad-mouse-model-by-attenuating-neuroinflammation
#2
Ronit Shapira, Beka Solomon, Shai Efrati, Dan Frenkel, Uri Ashery
There is a real need for new interventions for Alzheimer's disease (AD). Hyperbaric oxygen therapy (HBOT), the medical administration of 100% oxygen at conditions greater than 1 atmosphere absolute, has been used successfully to treat several neurological conditions, but its effects on AD pathology have never been thoroughly examined. Therefore, we exposed old triple-transgenic (3xTg) and non-transgenic mice to HBOT followed by behavioral, histological, and biochemical analyses. HBOT attenuated neuroinflammatory processes by reducing astrogliosis, microgliosis, and the secretion of proinflammatory cytokines (IL-1β and TNFα) and increasing expression of scavenger receptor A, arginase1, and antiinflammatory cytokines (IL-4 and IL-10)...
October 20, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29141140/n-heterocyclic-carbene-self-assembled-monolayers-on-gold-as-surface-plasmon-resonance-biosensors
#3
Zhijun Li, Kim A Munro, Iraklii I Ebralidze, Mina R Narouz, J Daniel Padmos, Hongxia Hao, Cathleen M Crudden, J Hugh Horton
Surface plasmon resonance (SPR)-based biosensing is a powerful tool to study the recognition processes between biomole-cules in real-time without need for labels. The use of thiol chemistry is a critical component in surface functionalization of various SPR biosensor surfaces on gold. However, its use is hampered by the high propensity for oxidation of the gold-thiol linkage even in ambient atmosphere, resulting in a short lifetime of SPR sensor chips unless strict precautions are taken. Herein, we describe an approach to overcome this limitation by employing highly robust self-assembled monolayers (SAMs) of alkylated N-heterocyclic carbenes (NHCs) on gold...
November 15, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29140676/synthesis-of-large-area-tungsten-disulfide-films-on-pre-reduced-tungsten-suboxides-substrates
#4
Soo Ho Choi, Stephen Boandoh, Young Ho Lee, Joo Song Lee, Ji-Hoon Park, Soo Min Kim, Woochul Yang, Ki Kang Kim
We report a facile method for the synthesis of large-area tungsten disulfide (WS2) film by means of chemical vapor deposition (CVD). To promote WS2 film growth, the precursor solution, which includes pre-reduced tungsten suboxides, is prepared by using hydrazine as the strong reduction agent and spin-coated onto the growth substrate. Growth is then carried out in a CVD chamber vaporized with dimethyl disulfide (DMDS) as the sulfur precursor. While only WS2 flakes are grown with un-reduced tungsten precursor under hydrogen atmosphere, WS2 film is readily attained on pre-reduced tungsten suboxide substrates without the need for further reduction by hydrogen, which is noted to induce discontinuity of grown film...
November 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29140598/disinfection-of-chicken-fillets-in-packages-with-atmospheric-cold-plasma-effects-of-treatment-voltage-and-time
#5
Jiamei Wang, Hong Zhuang, Kurt Lawrence, Jianhao Zhang
AIMS: To study effects of treatment voltage and time of in-package atmospheric cold plasmas (ACP) on quality of raw chicken meat. METHODS AND RESULTS: Meat was packed in trays in air, treated with ACP, and stored at 4°C for 24 h or 3 d. Increasing voltage from 55 to 80 kV caused increasing O3 inside packages, but had no effects on microbes, color, and pH after 24-h storage at 4°C. There were no differences in O3 , microbes, color lightness, and pH between treatment times 3, 6 and 9 min at 80 kV after 3-d storage...
November 15, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29140505/the-nrpi-multi-purpose-on-line-monitoring-station-for-measurement-of-natural-radioactivity-in-the-ambient-atmosphere-and-in-the-soil
#6
K Jílek, M Slezáková, A Fronka, T Prokop, L Neubauer
During years 2010-12 an automated, on-line and wireless outdoor measurement station of atmospheric radon, gamma dose rate and meteorological parameters was realised at the National Radiation Protection Institute (NRPI) in Prague. At the turn of the year 2013 an expansion of the existing station was completed. Under the project funded by the Czech Technological Agency a new updated station was established, additionally equipped with modules for measurement of atmospheric radon/thoron short-lived decay products, radon in water and soil and radon exhalation rate from soil...
November 13, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29140398/legacy-organochlorine-pollutants-in-glacial-watersheds-a-review
#7
K R Miner, J Blais, C Bogdal, S Villa, M Schwikowski, P Pavlova, C Steinlin, C Gerbi, K J Kreutz
Northern Hemisphere alpine glaciers have been identified as a point of concentration and reemergence of legacy organochlorine pollutants (OCPs). In this review, we compile a selection of published literature combining long-range, global atmospheric transport and distribution-based compartmental environmental flux models, as well as data from glacial meltwater, ice core, crevasse and proglacial lake sediment studies. Regional studies of ice and meltwater in alpine glaciers of the northern latitudes show similarities in sample deposition profiles and concentration due to chemical atmospheric residence time, precipitation type and glacier flow rates...
November 15, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/29140375/plasma-of-argon-increases-cell-attachment-and-bacterial-decontamination-on-different-implant-surfaces
#8
Luigi Canullo, Tullio Genova, Hom-Lay Wang, Stefano Carossa, Federico Mussano
PURPOSE: This in vitro study tested the effects of argon atmospheric pressure dielectric barrier discharge (APDBD) on different implant surfaces with regard to physical changes, bacterial decontamination, and osteoblast adhesion. MATERIALS AND METHODS: Seven hundred twenty disks with three different surface topographies-machined (MAC), titanium plasma-sprayed (TPS), and zirconia-blasted and acid-etched (ZRT)-were tested in this experiment. Bacterial adhesion tests were performed repeatedly on a simplified biofilm of Streptococcus mitis...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29140354/enhancement-of-raman-scattering-of-a-gaseous-medium-near-the-surface-of-a-silver-holographic-grating
#9
Dmitry V Petrov, Alexey R Zaripov, Nikita A Toropov
The Letter demonstrates a possibility to enhance the Raman scattering of a gaseous medium due to an enhanced electromagnetic field caused by the excitation of propagating surface plasmon polaritons (PSPPs) on a silver holographic grating. Efficiency of collinear and noncollinear schemes of PSPP excitation on a metal-gaseous medium interface was studied. When using a collinear scheme, we registered an eightfold enhancement of the Raman scattering of atmospheric nitrogen and oxygen, where the average gain near the PSPP-active surface was ∼4×10(3)...
November 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/29140333/second-order-moments-of-schell-model-beams-with-various-correlation-functions-in-atmospheric-turbulence
#10
Guo Zheng, Jue Wang, Lin Wang, Muchun Zhou, Yu Xin, Minmin Song
The general formulae for second-order moments of Schell-model beams with various correlation functions in atmospheric turbulence are derived and validated by the Bessel-Gaussian Schell-model beams and cosine-Gaussian-correlated Schell-model beams. Our finding shows that the second-order moments of partially coherent Schell-model beams are related to the second-order partial derivatives of source spectral degree of coherence at the origin. The formulae we provide are much more convenient to analyze and research propagation problems in turbulence...
November 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/29140324/method-to-retrieve-the-nocturnal-aerosol-optical-depth-with-a-ccd-laser-aerosol-detective-system
#11
Yuxuan Bian, Chunsheng Zhao, Wanyun Xu, Nan Ma, Jiangchuan Tao, Ye Kuang, Gang Zhao, Hongjian Liu
Aerosol optical depth (AOD) is a crucial parameter in describing the atmospheric pollution and analyzing the influences of aerosol on the radiative equilibrium. Currently, no method can precisely and continuously measure the nocturnal AOD. In this study, a novel method was developed to retrieve the nocturnal AOD based on a remote sensing instrument called the charge-coupled device-laser aerosol detective system (CCD-LADS). CCD-LADS consists of a CCD camera, a continuous laser, a fisheye lens, and related filters...
November 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/29140305/probabilistic-prognosis-of-environmental-radioactivity-concentrations-due-to-radioisotopes-discharged-to-water-bodies-from-nuclear-power-plants
#12
Juan Tomás Zerquera, Juan C Mora, Beatriz Robles
Due to their very low values, the complexity of comparing the contribution of nuclear power plants (NPPs) to environmental radioactivity with modeled values is recognized. In order to compare probabilistic prognosis of radioactivity concentrations with environmental measurement values, an exercise was performed using public data of radioactive routine discharges from three representative Spanish nuclear power plants. Specifically, data on liquid discharges from three Spanish NPPs: Almaraz, Vandellós II, and Ascó to three different aquatic bodies (river, lake, and coast) were used...
November 15, 2017: Toxics
https://www.readbyqxmd.com/read/29139533/at-the-very-beginning-of-life-on-earth-the-thiol-rich-peptide-trp-world-hypothesis
#13
Yannick Vallee, Ibrahim Shalayel, Kieu-Dung Ly, K V Raghavendra Rao, Gael De Paëpe, Katharina Märker, Anne Milet
Life developed on Earth probably about 3.8 billion years ago, on a planet that was already largely covered by oceans and where the atmosphere was very humid. The reactions, which may have led to the formation of the first polymers, particularly to the first peptides and nucleic acids, must have been compatible with these conditions. This is the case of the reaction of nitriles with aminothiols, such as cysteine and homocysteine. Since aminonitriles are the probable precursors of amino acids, this condensation reaction has been able to rapidly yield dipeptides, tripeptides, oligomers and even true polymers, each containing thiol functions...
2017: International Journal of Developmental Biology
https://www.readbyqxmd.com/read/29139499/the-role-of-phase-separation-and-related-topography-in-the-exceptional-ice-nucleating-ability-of-alkali-feldspars
#14
Thomas F Whale, Mark A Holden, Alexander N Kulak, Yi-Yeoun Kim, Fiona C Meldrum, Hugo K Christenson, Benjamin J Murray
Our understanding of crystal nucleation is a limiting factor in many fields, not least in the atmospheric sciences. It was recently found that feldspar, a component of airborne desert dust, plays a dominant role in triggering ice formation in clouds, but the origin of this effect was unclear. By investigating the structure/property relationships of a wide range of feldspars, we demonstrate that alkali feldspars with certain microtextures, related to phase separation into Na and K-rich regions, show exceptional ice-nucleating abilities in supercooled water...
November 15, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29139022/effect-of-plasma-activated-lactated-ringer-s-solution-on-pancreatic-cancer-cells-in-vitro-and-in-vivo
#15
Yusuke Sato, Suguru Yamada, Shigeomi Takeda, Norifumi Hattori, Kae Nakamura, Hiromasa Tanaka, Masaaki Mizuno, Masaru Hori, Yasuhiro Kodera
BACKGROUND: The medical applications of nonequilibrium atmospheric pressure plasma in cancer therapy have attracted attention. We previously reported on the antitumor effect of plasma-activated medium. However, this approach requires plasma-activated liquids that are administrable to the human body. In this study, we produced plasma-activated lactated Ringer's solution (PAL) and evaluated its antitumor effect and mechanism. Furthermore, we evaluated the effect of the intraperitoneal administration of PAL using a peritoneal dissemination mouse tumor model...
November 14, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29138765/sizing-sub-diffraction-limit-electrosprayed-droplets-by-structured-illumination-microscopy
#16
Adam Hollerbach, David Logsdon, Kiran Iyer, Anyin Li, J Andy Schaber, R Graham Cooks
Electrosprayed droplets are widely studied for their role in the formation of ions at atmospheric pressure. Most droplet measurement methods used today employ light scattering to infer information about an electrosprayed droplet's size. However, these methods fail to measure droplets smaller than about 400 nm in diameter due to constraints imposed by the diffraction limit of light. To overcome this limitation, a super resolution fluorescence microscopy-based method for determining the sizes of electrosprayed droplets has been developed...
November 15, 2017: Analyst
https://www.readbyqxmd.com/read/29138509/non-thermal-atmospheric-plasma-ameliorates-imiquimod-induced-psoriasis-like-skin-inflammation-in-mice-through-inhibition-of-immune-responses-and-up-regulation-of-pd-l1-expression
#17
Yun Sang Lee, Myung-Hoon Lee, Hang-Jun Kim, Ho-Ryun Won, Chul-Ho Kim
Plasma medicine is an emerging novel therapeutic field. It has been reported that plasma can kill bacteria, promote wound healing and induce apoptosis of tumor cells. However, the effects of plasma on immune cells and immune related skin diseases have not been well studied. In this study, we demonstrated that non-thermal atmospheric plasma (NTP) treatment could inhibit psoriasis-like skin inflammation in mice. NTP treatment in imiquimod-induced psoriasis-like mouse skin inhibited increases in epithelial cell thickness and expression of pro-inflammatory molecules compared to ones without the NTP treatment...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29138460/global-sequestration-potential-of-increased-organic-carbon-in-cropland-soils
#18
Robert J Zomer, Deborah A Bossio, Rolf Sommer, Louis V Verchot
The role of soil organic carbon in global carbon cycles is receiving increasing attention both as a potentially large and uncertain source of CO2 emissions in response to predicted global temperature rises, and as a natural sink for carbon able to reduce atmospheric CO2. There is general agreement that the technical potential for sequestration of carbon in soil is significant, and some consensus on the magnitude of that potential. Croplands worldwide could sequester between 0.90 and 1.85 Pg C/yr, i.e. 26-53% of the target of the "4p1000 Initiative: Soils for Food Security and Climate"...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29138444/the-elusive-evidence-of-volcanic-lightning
#19
K Genareau, P Gharghabi, J Gafford, M Mazzola
Lightning strikes are known to morphologically alter and chemically reduce geologic formations and deposits, forming fulgurites. A similar process occurs as the result of volcanic lightning discharge, when airborne volcanic ash is transformed into lightning-induced volcanic spherules (LIVS). Here, we adapt the calculations used in previous studies of lightning-induced damage to infrastructure materials to determine the effects on pseudo-ash samples of simplified composition. Using laboratory high-current impulse experiments, this research shows that within the lightning discharge channel there is an ideal melting zone that represents roughly 10% or less of the total channel radius at which temperatures are sufficient to melt the ash, regardless of peak current...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29138018/anti-tumor-effects-of-cold-atmospheric-pressure-plasma-on-vestibular-schwannoma-demonstrate-its-feasibility-as-an-intra-operative-adjuvant-treatment
#20
Yeo Jun Yoon, Michelle J Suh, Hyun Young Lee, Hae June Lee, Eun Ha Choi, In Seok Moon, Kiwon Song
Vestibular schwannoma (VS), although a benign intracranial tumor, causes morbidities by brainstem compression. Since chemotherapy is not very effective in most Nf2-negative schwannomas, surgical removal or radiation therapy is required. However, depending on the size and site of the tumor, these approaches may cause loss of auditory or vestibular functions, and severely decrease the post-surgical wellbeing. Here, we examined the feasibility of cold atmospheric pressure plasma (CAP) as an intra-operative adjuvant treatment for VS after surgery...
November 11, 2017: Free Radical Biology & Medicine
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