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https://www.readbyqxmd.com/read/28527350/bi-dimensional-variational-mode-decomposition-of-laser-speckle-contrast-imaging-data-a-clinical-approach-to-critical-limb-ischemia
#1
Anne Humeau-Heurtier, Pierre Abraham, Samir Henni
The number of patients suffering from peripheral arterial occlusive disease (PAOD) is growing worldwide. PAOD corresponds to an impairment of perfusion in the distal portion of some arteries that can generate critical limb ischemia. For some patients, the pathology leads to the necessity of amputation. PAOD may be diagnosed and studied with transcutaneous oxygen (tcpO2) measurements. However, the tcpO2 technique is a contact technique: probes have to be positioned on the limb, which may be impossible in case of ulcers and can lead to infection risks...
May 13, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28513178/decoupling-the-effects-of-mass-density-and-hydrogen-oxygen-and-aluminum-based-defects-on-optoelectronic-properties-of-realistic-amorphous-alumina
#2
Vanessa Riffet, Julien Vidal
The search for functional materials is currently hindered by the difficulty to find significant correlation between constitutive properties of a material and its functional properties. In the case of amorphous materials, the diversity of local structures, chemical composition, impurities and mass densities makes such connection difficult to be addressed. In this letter, the relation between refractive index and composition has been investigated for amorphous AlOx materials, including non-stoichiometric AlOx, emphasizing the role of structural defects and the absence of effect of the band gap variation...
May 17, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28493142/sampling-strategy-and-climatic-implication-of-tree-ring-cellulose-oxygen-isotopes-of-hippophae-tibetana-and-abies-georgei-on-the-southeastern-tibetan-plateau
#3
Chenxi Xu, Haifeng Zhu, Takeshi Nakatsuka, Masaki Sano, Zhen Li, Feng Shi, Eryuan Liang, Zhengtang Guo
The tree-ring cellulose oxygen isotopes (δ(18)O) for four trees of Hippophae tibetana and four trees of Abies georgei growing in different locations around the terminal moraine in Xincuo from 1951 to 2010 were measured to explore its potential for reconstructing climatic variations in the southeastern Tibetan Plateau. The mean and standard deviation of tree-ring δ(18)O at different heights do not have significant differences, and there are no significant differences in the mean and standard deviation of tree-ring δ(18)O between trees near the brook and trees at the top of moraine, indicating that we can collect samples for tree-ring δ(18)O analysis regardless of sampling heights and that the micro-environment does not affect tree-ring δ(18)O significantly...
May 10, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28487722/association-mapping-reveals-novel-genetic-loci-contributing-to-flooding-tolerance-during-germination-in-indica-rice
#4
Mengchen Zhang, Qing Lu, Wei Wu, Xiaojun Niu, Caihong Wang, Yue Feng, Qun Xu, Shan Wang, Xiaoping Yuan, Hanyong Yu, Yiping Wang, Xinghua Wei
Rice (Oryza sativa L.) is the only cereal crop that possesses the ability to germinate under flooded or other oxygen-deficient conditions. Rapid elongation of the coleoptile is a perfect response to flooding during germination, with coleoptile length differing among various rice varieties. Despite multiple studies have uncovered valuable information concerning this trait by focusing on the physiological metabolism of oxygen stress, the underlying genetic mechanism still remains unknown. In the present study, we screened coleoptile lengths of 432 indica varieties germinated in two environments (normal and flooded) and found more variation existing in flooded coleoptile length (FCL) rather than in normal coleoptile length (NCL)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28439264/benthic-diatom-based-indices-for-water-quality-assessment-in-two-subtropical-streams
#5
Xiang Tan, Quanfa Zhang, Michele A Burford, Fran Sheldon, Stuart E Bunn
Benthic diatoms have been universally used as indicators to assess water quality in lotic ecosystems. However, most diatom-based indices developed in Europe have not been widely used or tested in other continents such as Asia or Oceania. This study compared the performance of 14 widely-applied diatom indices in assessing ecological conditions in subtropical streams in South East Queensland (SEQ) in Australia and in the upper Han River in China. Most water quality variables in the upper Han River including dissolved organic carbon (DOC), total nitrogen (TN), and soluble reactive phosphorus (SRP) had strong relationships with at least one diatom index, with the exception of IDAP (Index Diatom Artois-Picardie), and TDI (Trophic Diatom Index)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28422974/variation-in-benthic-long-term-data-of-transitional-waters-is-interpretation-more-than-speculation
#6
Michael Lothar Zettler, René Friedland, Mayya Gogina, Alexander Darr
Biological long-term data series in marine habitats are often used to identify anthropogenic impacts on the environment or climate induced regime shifts. However, particularly in transitional waters, environmental properties like water mass dynamics, salinity variability and the occurrence of oxygen minima not necessarily caused by either human activities or climate change can attenuate or mask apparent signals. At first glance it very often seems impossible to interpret the strong fluctuations of e.g. abundances or species richness, since abiotic variables like salinity and oxygen content vary simultaneously as well as in apparently erratic ways...
2017: PloS One
https://www.readbyqxmd.com/read/28410502/importance-of-allochthonous-and-autochthonous-dissolved-organic-matter-in-fe-ii-oxidation-a-case-study-in-shizugawa-bay-watershed-japan
#7
Ying Ping Lee, Manabu Fujii, Tetsuro Kikuchi, Masafumi Natsuike, Hiroaki Ito, Toru Watanabe, Chihiro Yoshimura
Ferrous iron (Fe[II]) oxidation by dissolved oxygen was investigated in the Shizugawa Bay watershed with particular attention given to the effect of dissolved organic matter (DOM) properties on Fe(II) oxidation. To cover a wide spectrum of DOM composition, water samples were collected from various water sources including freshwater (e.g., river water and wastewater effluent) and coastal seawater. Measurement of nanomolar Fe(II) oxidation by using luminol chemiluminescence under dark, air-saturated conditions at 25 °C indicated that spatio-temporal variation of the second-order rate constant (6...
April 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28393776/serial-semi-invasive-hemodynamic-assessment-following-pericardiectomy-for-chronic-constrictive-pericarditis
#8
Ujjwal Kumar Chowdhury, Poonam Malhotra Kapoor, Adil Rizvi, Vishwas Malik, Sandeep Seth, Rajiv Narang, Mani Kalaivani, Sarvesh Pal Singh, Sathiya Selvam
OBJECTIVES: This study was designed to prospectively investigate the effects of pericardiectomy via median sternotomy on intra- and postoperative hemodynamics by a new semi-invasive device (Flotrac/VigileoTM monitor) using arterial pressure waveform analysis. PATIENTS AND METHODS: Thirty consecutive patients aged 15 to 55 years (mean+SD, 31.73 + 13.53 years), who had undergone total pericardiectomy via median sternotomy underwent serial hemodynamic evaluation. FlotracTM Sensor - derived stroke volume, stroke volume variation, systemic vascular resistance index (SVRI), cardiac index and right atrial pressure were measured just before and after pericardiectomy, at 12 hours, 24 hours, 48 hours, 72 hours and at discharge postoperatively...
April 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/28380204/pendelluft-diagnosed-from-ventilator-weaning-indexes-obtained-through-bioelectrical-impedance-tomography-a-case-report
#9
Fabiana Aparecida Lopes, Lidiane Andrade Monteiro de Souza, Juliana Tavares Neves Bernardi, Carlos Eduardo Rocha, Luciana Castilho de Figueiredo, Ana Paula Ragonete Dos Anjos Agostini, Desanka Dragosavac, Daniela Cristina Dos Santos Faez
CONTEXT: Today, through major technological advances in diagnostic resources within medicine, evaluation and monitoring of clinical parameters at the patient's bedside in intensive care units (ICUs) has become possible. CASE REPORT: This case report presents results and interpretations from predictive mechanical ventilation weaning indexes obtained through monitoring using chest electrical bioimpedance tomography. These indexes included maximum inspiratory pressure, maximum expiratory pressure, shallow breathing index and spontaneous breathing test...
April 3, 2017: São Paulo Medical Journal, Revista Paulista de Medicina
https://www.readbyqxmd.com/read/28332341/risk%C3%A2-factors-for-acute-exacerbation-of-idiopathic-pulmonary-fibrosis-a-systematic-review-and-meta-analysis
#10
Meihua Qiu, Yuqing Chen, Qiao Ye
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a chronic and progressive fibrotic disease limited to the lungs. The course of disease varies widely, with some patients experiencing acute respiratory deterioration, a condition called acute exacerbations of IPF (AE-IPF). The risk factors contributing to AE-IPF are unclear. This systematic review and meta-analysis investigated the risk factors for AE-IPF. METHODS: Studies of risk factors for AE-IPF were identified in Medline, EMBASE and Cochrane databases...
March 23, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28319861/different-salt-concentrations-induce-alterations-both-in-photosynthetic-parameters-and-salt-gland-activity-in-leaves-of-the-mangrove-avicennia-schaueriana
#11
Janaina Dos Santos Garcia, Ândrea Carla Dalmolin, Marcel Giovanni Costa França, Pedro Antônio Oliveira Mangabeira
Mangrove sites are constantly under tidal regimes, where there is variation of dissolved oxygen and saline content in water. This study evaluated the effects of varying salinity in Avicennia schaueriana, an abundant species in the sea-mangrove-river interface. Seedlings of A. schaueriana were harvested at the riverbank and placed in different saline and nutrient solutions in a greenhouse in order to simulate a saline flow. After 7 acclimatization days, plants were exposed to the following saline concentrations: 0, 50, 170 and 250mM NaCl, for a period of 30 days...
March 16, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28285400/how-does-environmental-variation-affect-the-distribution-of-dragonfly-larvae-odonata-in-the-amazon-cerrado-transition-zone-in-central-brazil
#12
T P Mendes, A Luiza-Andrade, H S R Cabette, L Juen
This study investigated the effects of environmental variation on assemblages of dragonfly larvae (Odonata). We hypothesize that there is a significant correlation between species richness, species composition, and abundance of Odonata individuals, and habitat integrity and abiotic variables. To test this hypothesis, we sampled odonate larvae at 12 streams in the Suiá-Miçú River basin in Mato Grosso, Brazil, during three different periods of the year. Local physical and chemical variables (temperature, pH, turbidity, electrical conductivity (EC), dissolved oxygen (DO), total dissolved solids (TDS), and oxidation reduction potential (ORP)) were measured at each site using a multi-parameter probe, and integrity was assessed using the Habitat Integrity Index (HII)...
March 11, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28250587/bread-wheat-progenitors-aegilops-tauschii-dd-genome-and-triticum-dicoccoides-aabb-genome-reveal-differential-antioxidative-response-under-water-stress
#13
Yadhu Suneja, Anil Kumar Gupta, Navtej Singh Bains
Antioxidant enzymes are known to play a significant role in scavenging reactive oxygen species and maintaining cellular homeostasis. Activity of four antioxidant enzymes viz., superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and glutathione reductase (GR) was examined in the flag leaves of nine Aegilops tauschii and three Triticum dicoccoides accessions along with two bread wheat cultivars under irrigated and rain-fed conditions. These accessions were shortlisted from a larger set on the basis of field performance for a set of morpho-physiological traits...
January 2017: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/28225865/continuous-blood-purification-treatment-for-endotoxin-induced-acute-respiratory-distress-syndrome
#14
Y Jiang, R Lin, Y Xu, S Zhang, K Cui, M Zhu, A Li, C Chen, J Yang, W Yang
This study aimed to explore the effects of continuous blood purification (CBP) treatment in pigs affected with acute respiratory distress syndrome (ARDS). A total of 12 healthy male pigs, weighing 12±1.8 kg, were randomly and equally assigned to the control and experimental groups. The ARDS pig model was prepared by intravenous injections of endotoxin (20 µg/kg). The control group was given conventional supportive therapy, while the experimental group was given continuous veno-venous hemofiltration therapy...
February 16, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28140358/structural-and-emission-properties-of-tb3-doped-nitrogen-rich-silicon-oxynitride-films
#15
Christophe Labbe, Yong Tao An, Grzegorz Zatryb, Xavier Portier, Artur Podhorodecki, Philippe Marie, Cedric Frilay, Julien Cardin, Fabrice Gourbilleau
Terbium doped silicon oxynitride host matrix is suitable for various applications such as light emitter compatible with CMOS technology or frequency converter system for photovoltaic cells. In this paper, amorphous Tb3+ ions doped nitrogen rich silicon oxynitride (NRSON) thin films were fabricated by reactive magnetron co-sputtering method, using various N2 flows and annealing conditions, in order to study their structural and emission properties. The Rutherford Backscattering Scattering (RBS) measurements and the refractive index values, confirmed the silicon oxynitride nature of the films...
January 31, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28134660/muscle-strength-but-not-muscle-oxidative-capacity-varies-between-the-morning-and-the-afternoon-in-patients-with-multiple-sclerosis-a-pilot-study
#16
Inez Wens, Dominique Hansen
Despite frequent muscle strength or muscle oxidative capacity (based on exercise-onset oxygen uptake [VO2] kinetics) assessments in patients with multiple sclerosis, the impact of time of day on these parameters is often not taken into account. Based on observations in healthy subjects, it remains to be studied whether muscle strength, and/or exercise-onset VO2 kinetics, varies between the morning and the afternoon in patients with multiple sclerosis. In this prospective observational pilot study, walking capacity, exercise-onset VO2 kinetics, isometric knee extension/flexion strength (dynamometry), and self-reported fatigue were measured in 11 patients with multiple sclerosis (age, 51...
January 27, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28116602/variation-in-oxidative-stress-indices-of-two-green-seaweeds-growing-under-different-heavy-metal-stresses
#17
Gehan A Ismail, Mona M Ismail
Concentrations of nine heavy metals (Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) were determined in the green seaweed species Cladophora glomerata and Ulva compressa collected from El-Mex and Sidi Kirayr locations. The heavy metal concentrations in algal tissues were in direct correlation with their soluble concentrations in seawater with the descending order: Fe<Mn<Zn<Cu<Cr<Pb<Ni<Cd<Co. The bioaccumulation factor of iron and copper was higher in both tested species collected from El-Mex, while it was maximum for cadmium in Sidi Kirayr location...
February 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28099981/use-of-esophageal-hemoximetry-to-assess-the-effect-of-packed-red-blood-cell-transfusion-on-gastrointestinal-oxygenation-in-newborn-infants
#18
Farha M Vora, Judy Gates, Kimberley Gerard, Shawn Hanson, Richard L Applegate, Arlin B Blood
Objectives There are no widely accepted methods of continuously monitoring gut oxygenation in the newborn during packed red blood cell transfusion. We investigated the use of an orally inserted light spectroscopy probe to measure lower esophageal oxyhemoglobin saturations (eStO2) before, during, and after transfusion and made comparisons with abdominal near-infrared spectroscopy (NIRS) and superior mesenteric artery (SMA) flow. Study Design Thirteen neonates with corrected gestational ages ranging from 22 weeks, 0 day to 37 weeks, 5 days were enrolled...
January 18, 2017: American Journal of Perinatology
https://www.readbyqxmd.com/read/28074802/goal-directed-therapy-improves-the-outcome-of-high-risk-cardiac-patients-undergoing-off-pump-coronary-artery-bypass
#19
RANDOMIZED CONTROLLED TRIAL
Poonam Malhotra Kapoor, Rohan Magoon, Rajinder Singh Rawat, Yatin Mehta, Sameer Taneja, R Ravi, Milind P Hote
BACKGROUND: There has been a constant emphasis on developing management strategies to improve the outcome of high-risk cardiac patients undergoing surgical revascularization. The performance of coronary artery bypass surgery on an off-pump coronary artery bypass (OPCAB) avoids the risks associated with extra-corporeal circulation. The preliminary results of goal-directed therapy (GDT) for hemodynamic management of high-risk cardiac surgical patients are encouraging. The present study was conducted to study the outcome benefits with the combined use of GDT with OPCAB as compared to the conventional hemodynamic management...
January 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/27966055/severity-of-individual-obstruction-events-is-gender-dependent-in-sleep-apnea
#20
Timo Leppänen, Antti Kulkas, Brett Duce, Esa Mervaala, Juha Töyräs
PURPOSE: In obstructive sleep apnea (OSA), severity of individual obstruction events is connected to increased mortality rate and it can be significantly different in patients with similar apnea-hypopnea index (AHI). However, possible gender-dependent variation in severity of obstruction events in different OSA categories is unknown. We investigated whether the severity of obstruction events differs between genders with similar AHI and if this difference varies between OSA categories...
December 13, 2016: Sleep & Breathing, Schlaf & Atmung
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