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https://www.readbyqxmd.com/read/28425026/photosynthetic-responses-to-temperature-across-leaf-canopy-ecosystem-scales-a-15-year-study-in-a-californian-oak-grass-savanna
#1
Siyan Ma, Jessica L Osuna, Joseph Verfaillie, Dennis D Baldocchi
Ecosystem CO2 fluxes measured with eddy-covariance techniques provide a new opportunity to retest functional responses of photosynthesis to abiotic factors at the ecosystem level, but examining the effects of one factor (e.g., temperature) on photosynthesis remains a challenge as other factors may confound under circumstances of natural experiments. In this study, we developed a data mining framework to analyze a set of ecosystem CO2 fluxes measured from three eddy-covariance towers, plus a suite of abiotic variables (e...
April 19, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28422911/do-vented-chest-seals-differ-in-efficacy-an-experimental-evaluation-using-a-swine-hemopneumothorax-model
#2
Bijan S Kheirabadi, Irasema B Terrazas, Nahir Miranda, Spc Amber N Voelker, Francoise Arnaud, Harold G Klemcke, Frank F Butler, Michael A Dubick
OBJECTIVE: Hemopneumothorax (HPTX) is the second leading cause of potentially preventable death among combat casualties. We investigated the ability of five FDA-approved non-occlusive chest seals (CSs) to seal a bleeding chest wound and prevent tension HPTX in a swine model. METHODS: Following instrumentation, an open chest wound was created in the left thorax of spontaneously air-breathing anesthetized pigs (n=26, 43 Kg). Autologous fresh blood (226 mL) was then infused into the pleural cavity to produce HPTX...
April 18, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28422501/interfacial-activity-of-non-amphiphilic-particles-in-fluid-fluid-interfaces
#3
Yi Zhang, Songcheng Wang, Jiarun Zhou, Ruiyang Zhao, Gregory Benz, Stephane Tcheimou, J Carson Meredith, Sven Holger Behrens
Surfactants can adsorb in fluid-fluid interfaces and lower the interfacial tension. Like surfactants, particles with appropriate wettability can also adsorb in fluid-fluid interfaces. Despite many studies of particle adsorption at fluid interfaces, some confusion persists regarding the ability of (simple, non-amphiphilic) particles to reduce the interfacial tension. In the present work, the interfacial activity of silica nanoparticles at air-water and hexadecane-water interfaces and of ethyl cellulose particles at the interface of water with trimethylolpropane trimethacrylate was analyzed through pendant drop tensiometry...
April 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28421269/thermal-balance-of-nellore-cattle
#4
Cíntia Carol de Melo Costa, Alex Sandro Campos Maia, Sheila Tavares Nascimento, Carolina Cardoso Nagib Nascimento, Marcos Chiquitelli Neto, Vinícius de França Carvalho Fonsêca
This work aimed at characterizing the thermal balance of Nellore cattle from the system of indirect calorimetry using a facial mask. The study was conducted at the Animal Biometeorology Laboratory of the São Paulo State University, Jaboticabal, Brazil. Five male Nellore weighing 750 ± 62 kg, at similar ages and body conditions were distributed in four 5 × 5 Latin squares (5 days of records and five schedules) during 20 days. Physiological and environmental measurements were obtained from the indirect calorimetry system using a facial mask...
April 18, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28416582/relationship-between-oxygen-concentration-and-temperature-in-an-exothermic-warming-device
#5
Ben Brooks, Charles D Deakin
INTRODUCTION: Actively warming hypothermic patients or preventing hypothermia is critical in optimising outcomes in patients with traumatic injuries. Our aim was to investigate the effect of ambient oxygen concentration on the rate and change in temperature of the TechTrade Ready-Heat II exothermic (oxygen-activated) warming blanket, to evaluate safety and ascertain the risk of thermal injury. METHODS: A mannequin covered with an exothermic blanket was placed in a sealed oxygen tent...
April 17, 2017: Emergency Medicine Journal: EMJ
https://www.readbyqxmd.com/read/28416013/no-seasonal-variation-in-physical-activity-of-han-chinese-living-in-beijing
#6
Guanlin Wang, Baoguo Li, Xueying Zhang, Chaoqun Niu, Jianbo Li, Li Li, John R Speakman
BACKGROUND: Physical activity (PA) is widely acknowledged to be beneficial to health and wellbeing, and is potentially influenced by a variety of environmental factors such as ambient temperature, weather conditions and air pollution levels. Since these factors vary seasonally, physical activity participation may also respond seasonally. Current population studies to profile physical activity often sample individuals only once, and this may result in biased estimates if there is strong seasonal variation...
April 17, 2017: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/28412572/quantitative-analysis-of-patients-with-celiac-disease-by-video-capsule-endoscopy-a-deep-learning-method
#7
Teng Zhou, Guoqiang Han, Bing Nan Li, Zhizhe Lin, Edward J Ciaccio, Peter H Green, Jing Qin
BACKGROUND: Celiac disease is one of the most common diseases in the world. Capsule endoscopy is an alternative way to visualize the entire small intestine without invasiveness to the patient. It is useful to characterize celiac disease, but hours are need to manually analyze the retrospective data of a single patient. Computer-aided quantitative analysis by a deep learning method helps in alleviating the workload during analysis of the retrospective videos. METHOD: Capsule endoscopy clips from 6 celiac disease patients and 5 controls were preprocessed for training...
April 8, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28412056/biomolecules-from-olive-pruning-waste-in-sierra-m%C3%A3-gina-engaging-the-energy-transition-by-multi-actor-and-multidisciplinary-analyses
#8
Marianne Cohen, Gilles Lepesant, Farida Lamari, Clelia Bilodeau, Petra Benyei, Stéphane Angles, Julien Bouillon, Kevin Bourrand, Ramla Landoulsi, Delphine Jaboeuf, Maria Alonso-Roldán, Isidro Espadas-Tormo, Veronica Belandria, Philippe Silar, Moussa Dicko
The price volatility of fossil resources, the uncertainty of their long-term availability and the environmental, climatic and societal problems posed by their operation lead to the need of an energy transition enabling the development and utilization of other alternative and sustainable resources. Acknowledging that indirect land-use change can increase greenhouse gas emission, the European Union (EU) has reshaped its biofuel policy. It has set criteria for sustainability to ensure that the use of biofuels guarantees real carbon savings and protects biodiversity...
April 12, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28402733/effect-of-surface-treatment-silane-and-universal-adhesive-on-microshear-bond-strength-of-nanofilled-composite-repairs
#9
I A Fornazari, I Wille, E M Meda, R T Brum, E M Souza
PURPOSE: The aim of this study was to evaluate the effect of surface treatment and universal adhesive on the microshear bond strength of nanoparticle composite repairs. METHODS: One hundred and forty-four specimens were built with a nanofilled composite (Filtek Supreme Ultra, 3M ESPE). The surfaces of all the specimens were polished with SiC paper and stored in distilled water at 37°C for 14 days. Half of the specimens were then air abraded with Al2O3 particles and cleaned with phosphoric acid...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402285/doping-of-graphene-induced-by-boron-silicon-substrate
#10
Arezoo Dianat, Zhongquan Liao, Martin Gall, Tao Zhang, Rafael Gutierrez, Ehrenfried Zschech, Gianaurelio Cuniberti
In this work, we show the doping of graphene most likely from heteroatoms induced by the substrate using Raman spectrum, X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX) and ab initio molecular dynamics simulations. The doping of graphene on a highly boron-doped silicon substrate was achieved by an annealing at 400 K for about 3 hours in an oven with air flow. With the same annealing, only the Raman features similar to that from the pristine graphene were observed in the freestanding graphene and the graphene on a typical Si/SiO2 wafer...
April 12, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28386701/representativeness-of-scholander-chamber-measurements-as-a-function-of-time-after-leaf-removal
#11
Genei Antonio Dalmago, Gilberto Rocca da Cunha, Anderson Santi, Elizandro Fochesatto, Samuel Kovaleski
The objectives of the study were to determine the maximum tolerable period between leaf removal from a plant and the determination of leaf water potential (Ψ l ), and to evaluate different ways of packing leaves after their removal from a plant (LR). Two experiments (Exp) were conducted in a randomized complete block design with four replicates, using bean, maize, and soybean crops. The predawn leaf water potential (Ψ PD ) (Exp1) and the minimum leaf water potential (Ψ min ) (Exp1 and Exp2) were determined...
April 6, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28386065/design-and-demonstration-of-an-underwater-acoustic-carpet-cloak
#12
Yafeng Bi, Han Jia, Wenjia Lu, Peifeng Ji, Jun Yang
The carpet cloak, which is designed to hide the objects placed on a reflecting surface, has become a topic of considerable interest. Inspired by those theoretical works, the experimental realization of acoustic carpet cloak in air host has been reported. However, due to the difficulty in obtaining the unit cell in reality, the underwater carpet cloak still remains in simulation thus far. Here, we design and fabricate a realizable underwater acoustic carpet cloak. By introducing a scaling factor, the structure of the carpet cloak, which is comprised of layered brass plates, is greatly simplified at the cost of some impedance match...
April 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28385373/computed-tomography-features-of-lung-adenocarcinomas-with-programmed-death-ligand-1-expression
#13
Gouji Toyokawa, Kazuki Takada, Tatsuro Okamoto, Mototsugu Shimokawa, Yuka Kozuma, Taichi Matsubara, Naoki Haratake, Shinkichi Takamori, Takaki Akamine, Masakazu Katsura, Fumihiro Shoji, Yoshinao Oda, Yoshihiko Maehara
INTRODUCTION: The development of immune checkpoint inhibitors against programmed death 1 has paved the way for a new era of treatment of lung cancer. Programmed death-ligand 1 (PD-L1) is expected to predict the response of immune checkpoint inhibitors in lung cancer. Predicting PD-L1 expression using a noninvasive method before immunotherapy would, therefore, help identify patients for whom immunotherapy can be successful. PATIENTS AND METHODS: A total of 394 patients with resected lung adenocarcinoma who had undergone preoperative thin-section computed tomography (CT) were analyzed for PD-L1 expression by immunohistochemistry and evaluated to determine the association between PD-L1 expression and CT characteristics, including convergence, surrounding ground glass opacity (GGO), air bronchogram, notching, pleural indentation, spiculation, and cavitation...
March 16, 2017: Clinical Lung Cancer
https://www.readbyqxmd.com/read/28383249/ion-separation-in-air-using-a-three-dimensional-printed-ion-mobility-spectrometer
#14
Adam Hollerbach, Zane Baird, R Graham Cooks
The performance of a small, plastic drift tube ion mobility spectrometer (DT-IMS) is described. The IMS was manufactured using three-dimensional (3D) printing techniques and operates in the open air at ambient pressure, temperature, and humidity. The IMS housing and electrodes were printed from nonconductive polylactic acid (PLA, housing) and conductive polyethylene terephthalate glycol-modified polymer containing multiwalled carbon nanotubes (PETG-CNT, electrodes). Ring electrodes consisting of both an inner disk and an outer ring were used to prevent neutral transmission while maximizing ion transmission...
April 13, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28380834/dielectric-lens-guides-in-plane-propagation-of-surface-plasmon-polaritons
#15
Wen-Bo Shi, Tian-Yong Chen, Hao Jing, Ru-Wen Peng, Mu Wang
In this work, we present in-plane propagation of surface plasmon polaritons (SPPs) guided by a single dielectric (Al<sub>2</sub>O<sub>3</sub>) subwavelength lens. By mounting a designed Al<sub>2</sub>O<sub>3</sub> nanoparticle on the silver film, the effective index of a silver-Al<sub>2</sub>O<sub>3</sub> interface is influenced by the particle thickness, then the phase difference between the silver-air and silver-Al<sub>2</sub>O<sub>3</sub> interface can be utilized to modulate the in-plane propagation of SPPs...
March 6, 2017: Optics Express
https://www.readbyqxmd.com/read/28379275/synthesis-of-copper-hydride-cuh-from-cuco3%C3%A2-cu-oh-2-a-path-to-electrically-conductive-thin-films-of-cu
#16
Cláudio M Lousada, Ricardo M F Fernandes, Nadezda V Tarakina, Inna L Soroka
The most common synthesis methods for copper hydride (CuH) employ hard ligands that lead to the formation of considerable amounts of metallic Cu as side-product. Here we explore a synthesis method for CuH(s) through the reaction of CuCO3·Cu(OH)2(s) with hypophosphorous acid (H3PO2) in solution, via the formation of the intermediate Cu(H2PO2)2(aq) complex. The reaction products were characterized with XRD, FTIR and SEM at different reaction times, and the kinetics of the transformation of Cu(H2PO2)2(aq) to CuH(s) were followed with NMR and are discussed...
April 5, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28377628/dating-stalagmites-in-mediterranean-climates-using-annual-trace-element-cycles
#17
Gurinder Nagra, Pauline C Treble, Martin S Andersen, Petra Bajo, John Hellstrom, Andy Baker
Speleothems may preserve geochemical information at annual resolution, preserving information about past hydrology, environment and climate. In this study, we advance information-extraction from speleothems in two ways. First, the limitations in dating modern stalagmites are overcome by refining a dating method that uses annual trace element cycles. It is shown that high-frequency variations in elements affected by prior calcite precipitation (PCP) can be used to date speleothems and yield an age within 2-4% chronological uncertainty of the actual age of the stalagmite...
April 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28377395/integrated-approach-of-nutritional-and-molecular-epidemiology-mineralogical-and-chemical-pollutant-characterisation-the-protocol-of-a-cross-sectional-study-in-women
#18
Martina Barchitta, Annalisa Quattrocchi, Andrea Maugeri, Germana Barone, Paolo Mazzoleni, Alfio Catalfo, Guido De Guidi, Maria Iemmolo, Nunzio Crimi, Antonella Agodi
INTRODUCTION: Environmentally-related health and disease are the result of the exposome, the totality of a person's environmental exposures, from all sources and routes, across their lifespan. Epigenetic phenomena, including DNA methylation, can be potentially modified by environmental and lifestyle factors, and result in environmental reprogramming of the genome for exposed individuals and for future generations of offspring. OBJECTIVE: The objective of the project is to evaluate the risk of DNA hypomethylation due to air pollution, Mediterranean diet adherence, folate intake, and demographic and socioeconomic factors, in healthy women living in the metropolitan area of Catania, Italy...
April 4, 2017: BMJ Open
https://www.readbyqxmd.com/read/28376353/expressing-air-pollution-induced-health-related-externalities-in-physical-terms-with-the-help-of-dalys
#19
Till M Bachmann, Jonathan van der Kamp
The unintended impacts of industrial activity on human health and the environment have regularly been assessed and monetised (referred to as "external costs"). External costs are, however, a rather abstract aggregate so that decision makers cannot easily relate them to tangible impacts. At the same time, physical health impact indicators have different units that cannot readily be compared and communicated in a joint way. To support better informed decisions at policy or company level, we propose and demonstrate a way to facilitate communication on non-monetized, that is, physical health indicators quantified in studies...
April 1, 2017: Environment International
https://www.readbyqxmd.com/read/28375118/measurement-of-air-contamination-in-different-wards-of-public-sector-hospital-sukkur
#20
Badaruddin AllahDino Memon, Gul Hassan Bhutto, Wajid Hussain Rizvi
The aim of this study was to evaluate and assess the index of bacterial contamination in different wards of the Public Sector Hospital of Sukkur (Teaching) Pakistan; whether or not the air contamination was statistically different from the acceptable level using active and passive sampling. In addition to this main hypothesis, other investigations included: occurrence of the most common bacteria, whether or not the bacterial contamination in the wards was a persistent problem and identification of the effective antibiotics against the indentified bacteria...
November 2016: Pakistan Journal of Pharmaceutical Sciences
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