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https://www.readbyqxmd.com/read/29340384/kinetics-of-the-a-c3h5-o2-reaction-investigated-by-photoionization-using-synchrotron-radiation
#1
D Schleier, P Constantinidis, N Faßheber, I Fischer, G Friedrichs, P Hemberger, E Reusch, B Sztáray, K Voronova
The kinetics of the combustion-relevant reaction of the allyl radical, a-C3H5, with molecular oxygen has been studied in a flow tube reactor at the vacuum ultraviolet (VUV) beamline of the Swiss Light Source storage ring, using the CRF-PEPICO (Combustion Reactions Followed by Photoelectron Photoion Coincidence Spectroscopy) setup. The ability to measure threshold photoelectron spectra enables a background-free detection of reactive species as well as an isomer-specific analysis of reaction products. Allyl was generated by direct photodissociation of allyl iodide at 266 nm and 213 nm and indirectly by the reaction of propene with Cl atoms, which were generated by photolysis from oxalyl chloride at 266 nm...
January 17, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29337613/molecular-detection-of-avian-influenza-virus-from-sediment-samples-in-waterfowl-habitats-on-the-delmarva-peninsula-united-states
#2
C L Densmore, D D Iwanowicz, C A Ottinger, L J Hindman, A M Bessler, L R Iwanowicz, D J Prosser, M Whitbeck, C P Driscoll
Avian influenza viruses (AIV) affect many species of birds including waterfowl and may persist in sediment in aquatic habitats. Sediment samples were collected from two areas representative of prime migration and overwintering waterfowl habitat in Dorchester County, Maryland in the fall and winter of 2013-2014. Samples were screened for the presence of AIV via reverse transcriptase-quantitative PCR targeting the matrix gene. Although 13.6% of sediment samples were positive for the AIV matrix gene across all collection dates and locations, differences in detection were noted with location and collection season...
December 2017: Avian Diseases
https://www.readbyqxmd.com/read/29334148/self-powered-si-cds-flexible-photodetector-with-broadband-response-from-325-to-1550-nm-based-on-pyro-phototronic-effect-an-approach-for-photosensing-below-bandgap-energy
#3
Yejing Dai, Xingfu Wang, Wenbo Peng, Cheng Xu, Changsheng Wu, Kai Dong, Ruiyuan Liu, Zhong Lin Wang
Cadmium sulfide (CdS) has received widespread attention as the building block of optoelectronic devices due to its extraordinary optoelectronic properties, low work function, and excellent thermal and chemical stability. Here, a self-powered flexible photodetector (PD) based on p-Si/n-CdS nanowires heterostructure is fabricated. By introducing the pyro-phototronic effect derived from wurtzite structured CdS, the self-powered PD shows a broadband response range, even beyond the bandgap limitation, from UV (325 nm) to near infrared (1550 nm) under zero bias with fast response speed...
January 15, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29329211/causation-of-acute-flaccid-paralysis-by-myelitis-and-myositis-in-enterovirus-d68-infected-mice-deficient-in-interferon-%C3%AE-%C3%AE-%C3%AE-receptor-deficient-mice
#4
John D Morrey, Hong Wang, Brett L Hurst, Katherine Zukor, Venkatraman Siddharthan, Arnaud J Van Wettere, Donal G Sinex, E Bart Tarbet
Enterovirus D68 (EV-D68) caused a large outbreak in the summer and fall of 2014 in the United States. It causes serious respiratory disease, but causation of associated paralysis is controversial, because the virus is not routinely identified in cerebrospinal fluid. To establish clinical correlates with human disease, we evaluated EV-D68 infection in non-lethal paralysis mouse models. Ten-day-old mice lacking interferon responses were injected intraperitoneally with the virus. Paralysis developed in hindlimbs...
January 12, 2018: Viruses
https://www.readbyqxmd.com/read/29327125/icariin-improves-cognitive-impairment-after-traumatic-brain-injury-by-enhancing-hippocampal-acetylation
#5
Zi-Gang Zhang, Xin Wang, Jin-Hai Zai, Cai-Hua Sun, Bing-Chun Yan
OBJECTIVE: To examine the effect of icariin (ICA) on the cognitive impairment induced by traumatic brain injury (TBI) in mice and the underlying mechanisms related to changes in hippocampal acetylation level. METHODS: The modifified free-fall method was used to establish the TBI mouse model. Mice with post-TBI cognitive impairment were randomly divided into 3 groups using the randomised block method (n=7): TBI (vehicle-treated), low-dose (75 mg/kg) and high-dose (150 mg/kg) of ICA groups...
January 9, 2018: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/29325985/platelet-activating-antibodies-are-detectable-at-the-earliest-onset-of-heparin-induced-thrombocytopenia-with-implications-for-the-operating-characteristics-of-the-serotonin-release-assay
#6
Theodore E Warkentin, Donald M Arnold, John G Kelton, Jo-Ann I Sheppard, James W Smith, Ishac Nazy
BACKGROUND: HIT is a prothrombotic drug reaction caused by platelet-activating antibodies that recognize PF4/heparin complexes. It is unknown whether platelet-activating antibodies are detectable at the onset of the HIT-related platelet count fall. METHODS: Available blood samples from 18 patients obtained at onset of HIT were tested using the serotonin-release assay (SRA), a test for platelet-activating antibodies, and a PF4-dependent ELISA. Patient samples showing a delay of >2 days between ELISA and SRA seroconversion were tested for subthreshold levels of platelet-activating antibodies using two modifications of the SRA that amplify detection of HIT antibodies...
January 8, 2018: Chest
https://www.readbyqxmd.com/read/29324510/reliability-and-validity-of-computerized-force-platform-measures-of-balance-function-in-healthy-older-adults
#7
Cathy C Harro, Chelsea Garascia
BACKGROUND AND PURPOSE: Postural control declines with aging and is an independent risk factor for falls in older adults. Objective examination of balance function is warranted to direct fall prevention strategies. Force platform (FP) systems provide quantitative measures of postural control and analysis of different aspects of balance. The purpose of this study was to examine the reliability and validity of FP measures in healthy older adults. METHODS: This study enrolled 46 healthy elderly adults, mean age 67...
January 10, 2018: Journal of Geriatric Physical Therapy
https://www.readbyqxmd.com/read/29323208/composition-of-salivary-microbiota-in-elderly-subjects
#8
Taiji Ogawa, Yujiro Hirose, Mariko Honda-Ogawa, Minami Sugimoto, Satoshi Sasaki, Masahito Kibi, Shigetada Kawabata, Kazunori Ikebe, Yoshinobu Maeda
Frailty is gaining attention worldwide with the aging of society. Despite the potential lethality and multiple signs and symptoms in affected individuals, preclinical detection of early manifestations leading to frailty syndrome have not been established. We speculated that the composition of the oral microbiota is associated with general frailty, as well as a relationship between gut microbiota and general health condition. In the present study, we investigated the salivary microbiota composition in samples from healthy and frail elderly individuals using 16S rRNA sequencing analysis for characterization...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29319785/diagnostic-accuracy-and-prognostic-value-of-simultaneous-hybrid-18f-fluorodeoxyglucose-positron-emission-tomography-magnetic-resonance-imaging-in-cardiac-sarcoidosis
#9
Eleanor C Wicks, Leon J Menezes, Anna Barnes, Saidi A Mohiddin, Neha Sekhri, Joanna C Porter, Helen L Booth, Emily Garrett, Riyaz S Patel, Menelaos Pavlou, Ashley M Groves, Perry M Elliott
Aims: Cardiac death is the leading cause of mortality in patients with sarcoidosis, yet cardiac involvement often remains undetected. Cardiovascular magnetic resonance imaging (CMR) and 18F-fluorodeoxyglucose (FDG)-positron emission tomography (PET) have been used to diagnose cardiac sarcoidosis (CS) yet never simultaneously in a cohort. This study sought to assess the diagnostic and prognostic utility of simultaneous hybrid cardiac PET/MR. Methods and results: Fifty-one consecutive patients with suspected CS (age 50 ± 13 years, 31 males) underwent simultaneous PET/MR following a high-fat/low-carbohydrate diet and 12-h fast...
January 8, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29318933/comparing-auditory-visual-and-vibrotactile-cues-in-individuals-with-parkinson-s-disease-for-reducing-risk-of-falling-over-different-types-of-soil
#10
Johannes C Ayena, Louis E Tremblay, Martin J-D Otis, Bob-Antoine J Ménélas
INTRODUCTION: Several researchers have demonstrated the positive benefits of auditory and visual cueing in the gait improvements among individuals with Parkinson's disease (PD). However, few studies have evaluated the role of vibrotactile cueing when compared to auditory and visual cueing. This paper compares how these stimuli affect the risk of falling while walking on six types of soil (concrete, sand, parquet, broken stone, two types of carpet). METHODS: An instrumented Timed Up and Go (iTUG) test served to evaluate how audio, visual and vibrotactile cueing can affect the risk of falling of elderly...
January 10, 2018: Somatosensory & Motor Research
https://www.readbyqxmd.com/read/29315908/sub-minute-kinetics-of-human-red-cell-fumarase-1-h-spin-echo-nmr-spectroscopy-and-13-c-rapid-dissolution-dynamic-nuclear-polarization
#11
Dmitry Shishmarev, Alan J Wright, Tiago B Rodrigues, Giuseppe Pileio, Gabriele Stevanato, Kevin M Brindle, Philip W Kuchel
Fumarate is an important probe of metabolism in hyperpolarized magnetic resonance imaging and spectroscopy. It is used to detect the release of fumarase in cancer tissues, which is associated with necrosis and drug treatment. Nevertheless, there are limited reports describing the detailed kinetic studies of this enzyme in various cells and tissues. Thus, we aimed to evaluate the sub-minute kinetics of human red blood cell fumarase using nuclear magnetic resonance (NMR) spectroscopy, and to provide a quantitative description of the enzyme that is relevant to the use of fumarate as a probe of cell rupture...
January 8, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/29315412/automated-pupillometry-and-detection-of-clinical-transtentorial-brain-herniation-a-case-series
#12
Alexander Papangelou, Elizabeth K Zink, Wan-Tsu W Chang, Anthony Frattalone, Daniel Gergen, Allan Gottschalk, Romergryko G Geocadin
Introduction: Transtentorial herniation (TTH) is a life-threatening neurologic condition that typically results from expansion of supratentorial mass lesions. A change in bedside pupillary examination is central to the clinical diagnosis of TTH. Materials and Methods: To quantify the changes in the pupillary examination that precede and accompany TTH and its treatment, we evaluated 12 episodes of herniation in three patients with supratentorial mass lesions using automated pupillometry (NeurOptics, Inc...
January 5, 2018: Military Medicine
https://www.readbyqxmd.com/read/29310208/a-viscous-film-sample-chamber-for-laser-ablation-inductively-coupled-plasma-mass-spectrometry
#13
Damiano Monticelli, Davide Civati, Barbara Giussani, Carlo Dossi, Davide Spanu, Sandro Recchia
Laser Ablation - Inductively Coupled Plasma - Mass Spectrometry (LA-ICP-MS) is a powerful method to determine the elemental composition of solid-state samples as it combines the high sensitivity and isotope selectivity of ICP-MS detection and the simplicity of laser ablation sampling. This technique enables rapid multiple sampling of the analysed material, such as needed for mapping or in-depth profiling applications. However, the duration of these measurements is practically restricted by the time taken for the particle to be transported from the sampling point to the ICP torch...
March 1, 2018: Talanta
https://www.readbyqxmd.com/read/29303546/establishment-of-lcms-based-platform-for-discovery-of-quorum-sensing-inhibitors-signal-detection-in-pseudomonas-aeruginosa-pao1
#14
Manoj Kushwaha, Shreyans K Jain, Nisha Sharma, Vidushi Abrol, Sundeep Jaglan, Ram A Vishwakarma
Targeting the main three networking systems viz. Las, RhI and PQS via natural quenchers is a new ray of hope for combating the persistent behavior of Pseudomonas aeruginosa. In the bacterial chemical vocabulary pyocyanin, N-AHLs and rhamnolipids are the main keywords, which are responsible for the social and nomadic behavior of P. aeruginosa. In the present work LCMS-based real-time qualitative and quantitative analysis of pyocyanin, green phenazine, N-AHLs, and rhamnolipids were performed. The quantitative analysis indicates that the production of pyocyanin and NHSLs increases with time while the production of rhamnolipids discontinued after 16 Hrs...
January 5, 2018: ACS Chemical Biology
https://www.readbyqxmd.com/read/29301764/adverse-events-in-patients-in-home-healthcare-a-retrospective-record-review-using-trigger-tool-methodology
#15
Kristina Görel Ingegerd Schildmeijer, Maria Unbeck, Mirjam Ekstedt, Marléne Lindblad, Lena Nilsson
OBJECTIVE: Home healthcare is an increasingly common part of healthcare. The patients are often aged, frail and have multiple diseases, and multiple caregivers are involved in their treatment. This study explores the origin, incidence, types and preventability of adverse events (AEs) that occur in patients receiving home healthcare. DESIGN: A study using retrospective record review and trigger tool methodology. SETTING AND METHODS: Ten teams with experience of home healthcare from nine regions across Sweden reviewed home healthcare records in a two-stage procedure using 38 predefined triggers in four modules...
January 3, 2018: BMJ Open
https://www.readbyqxmd.com/read/29299914/growth-of-wafer-scale-standing-layers-of-ws2-for-self-biased-high-speed-uv-visible-nir-optoelectronic-devices
#16
Hong-Sik Kim, Malkeshkumar Patel, Joondong Kim, Mun Seok Jeong
This work describes the wafer-scale standing growth of (002)-plane-oriented layers of WS2 and their suitability for use in self-biased broadband high-speed photodetection. The WS2 layers are grown using large-scale sputtering, and the effects of the processing parameters such as the deposition temperature, time, and sputtering power are studied. The structural, physical, chemical, optical, and electrical properties of the WS2 samples are also investigated. Based on the broadband light absorption and high-speed in-plane carrier transport characteristics of the WS2 layers, a self-biased broadband high-speed photodetector is fabricated by forming a type-II heterojunction...
January 4, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29299258/fungi-feather-damage-and-risk-of-predation
#17
Zaid Al Rubaiee, Haider Al Murayati, Jan Tøttrup Nielsen, Anders Pape Møller
Predation is a powerful selective force with important effects on behavior, morphology, life history, and evolution of prey. Parasites may change body condition, health status, and ability to escape from or defend prey against predators. Once a prey individual has been detected, it can rely on a diversity of means of escape from the pursuit by the predator. Here we tested whether prey of a common raptor differed in terms of fungi from nonprey recorded at the same sites using the goshawk Accipiter gentilis and its avian prey as a model system...
December 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29297849/tessaracoccus-terricola-sp-nov-isolated-from-oil-contaminated-soil
#18
Dhiraj Kumar Chaudhary, Jaisoo Kim
A Gram-stain-positive, non-motile, yellow and rod-shaped actinobacterium, designated strain Brt-AT, isolated from oil-contaminated soil, grew at 15-40 °C, at pH 5.5-10.0 and at 0-2 % (w/v) NaCl concentration. This strain was characterized by a polyphasic approach. The 16S rRNA gene sequence analysis showed that strain Brt-AT belonged to the genus Tessaracoccus and is closely related to Tessaracoccus rhinocerotis YIM 101269T, Tessaracoccus flavescens SST-39T, Tessaracoccus defluvii LNB-140T and Tessaracoccus flavus RP1T (99...
January 3, 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29291497/a-descriptive-study-of-accidental-skeletal-injuries-and-non-accidental-skeletal-injuries-of-child-maltreatment
#19
Maha A H Ghanem, Tarek A Moustafa, Haidy M Megahed, Naglaa Salama, Sara A Ghitani
BACKGROUND: Lack of awareness and recognition of child maltreatment is the major reason behind underreporting. All victims often interact with the health care system for routine or emergency care. In several research works, non-accidental fractures are the second most common injury in maltreated children and it is represented up to one-third of cases. AIM OF THE STUDY: To determine the incidence of different types of accidental and non-accidental skeletal injuries among children, estimate the severity of injuries according to the modified injury severity score and to determine the degree of fractures either closed or opened (Gustiloe-Anderson open fracture classification)...
December 23, 2017: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/29290306/risk-factors-associated-with-time-to-first-clinical-case-of-bacterial-kidney-disease-bkd-in-farmed-atlantic-salmon-salmo-salar-l-in-new-brunswick-canada
#20
A S Boerlage, A Elghafghuf, H Stryhn, J Sanchez, K L Hammell
Infection with Renibacterium salmoninarum, the cause of Bacterial Kidney Disease (BKD) occurs in salmon populations in many locations, including the east coast of Canada. However, information about risk factors for BKD and their effects in the saltwater phase of the salmon aquaculture industry in the region is inadequate. We conducted a retrospective observational cohort study using industry health records in which BKD was recorded in New Brunswick, Canada, between 2006 and 2012. Several risk factors for BKD, such as stocking season, mortality percentage in the first four weeks, food conversion ratio (FCR), lice treatment, Bay Management Area (BMA), and production year were analyzed in a survival analysis using Cox proportional hazards models with cross-classified random effects to account for the structure of the data...
January 1, 2018: Preventive Veterinary Medicine
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