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https://www.readbyqxmd.com/read/28430813/phytoplankton-blooms-during-austral-summer-in-the-ross-sea-antarctica-driving-factors-and-trophic-implications
#1
Olga Mangoni, Vincenzo Saggiomo, Francesco Bolinesi, Francesca Margiotta, Giorgio Budillon, Yuri Cotroneo, Cristina Misic, Paola Rivaro, Maria Saggiomo
During the austral summer of 2014, an oceanographic cruise was conducted in the Ross Sea in the framework of the RoME (Ross Sea Mesoscale Experiment) Project. Forty-three hydrological stations were sampled within three different areas: the northern Ross Sea (RoME 1), Terra Nova Bay (RoME 2), and the southern Ross Sea (RoME 3). The ecological and photophysiological characteristics of the phytoplankton were investigated (i.e., size structure, functional groups, PSII maximum quantum efficiency, photoprotective pigments), as related to hydrographic and chemical features...
2017: PloS One
https://www.readbyqxmd.com/read/28430238/microsensors-based-on-a-whispering-gallery-mode-in-algan-microdisks-undercut-by-hydrogen-environment-thermal-etching
#2
Tetsuya Kouno, Masaru Sakai, Hoshi Takeshima, Sho Suzuki, Akihiko Kikuchi, Katsumi Kishino, Kazuhiko Hara
AlGaN microdisks were fabricated via a top-down process using electron-beam lithography, inductively coupled plasma reactive-ion etching, and hydrogen-environment thermal etching from commercial epitaxial wafers with a 100-300 nm thick AlGaN layer grown on a c-plane GaN layer by metal-organic chemical vapor deposition. The hydrogen-environment thermal etching performed well in undercutting the AlGaN microdisks owing to the selective etching for the GaN layer. The AlGaN microdisks acted as the whispering gallery mode (WGM) optical microresonators, exhibiting sharp resonant peaks in room temperature photoluminescence spectra...
April 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28430224/spectral-shaping-for-suppressing-stimulated-raman-scattering-in-a-fiber-laser
#3
Haiyang Xu, Man Jiang, Chen Shi, Pu Zhou, Guomin Zhao, Xijia Gu
We report on the effects of spectral shaping of the output coupler fiber Bragg grating (OC-FBG) in a Yb-doped fiber laser on the laser emission spectrum for the purpose of inhabiting stimulated Raman scattering (SRS). The lasers with four different OC-FBGs were built and characterized. We found that the laser with a multiple reflection peak chirped-moiré OC-FBG produced a broad laser emission linewidth, which, in turn, led to about 100 times lower the SRS emission as compared with the laser with a 0.19 nm Gaussian-shaped OC-FBG...
April 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28428840/an-internet-based-platform-for-the-estimation-of-outcrossing-potential-between-cultivated-and-chilean-vascular-plants
#4
Pablo Cid, Carlos Aguirre, Miguel Ángel Sánchez, Daniel Zamorano, Maritza Mihoc, Erika Salazar, Gustavo Chacón, Humberto Navarrete, Marcelo Rosas, Humberto Prieto
A national-scale study of outcrossing potential within Chilean vascular flora was conducted using an upgraded algorithm, which adds parameters such as pollinator agents, climate, and geographic conditions. Datasets were organized and linked in a Web platform (www.flujogenico.cl), in which the development of a total outcrossing potential (TOP) predictor was formulated. The TOP predictor is the engine in the Web platform, which models the effect of a type of agricultural practice on others (coexistence calculation mode) and on the environment (biodiversity calculation mode)...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28420126/novel-genetic-variants-associated-with-child-refractory-esophageal-stricture-with-food-allergy-by-exome-sequencing
#5
Min Yang, Min Xiong, Huan Chen, Lanlan Geng, Peiyu Chen, Jing Xie, Shui Qing Ye, Ding-You Li, Sitang Gong
BACKGROUND: Refractory esophageal stricture (RES) may be attributed to food allergy. Its etiology and pathogenesis are not fully understood. Identification of novel genetic variants associated with this disease by exome sequencing (exome-seq) may provide new mechanistic insights and new therapeutic targets. METHODS: To identify new and novel disease-associating variants, whole-exome sequencing was performed on an Illumina NGS platform in three children with RES as well as food allergy...
April 15, 2017: Nutrients
https://www.readbyqxmd.com/read/28419482/fmea-of-manual-and-automated-methods-for-commissioning-a-radiotherapy-treatment-planning-system
#6
Amy Wexler, Bruce Gu, Sreekrishna Goddu, Maya Mutic, Sridhar Yaddanapudi, Lindsey Olsen, Taylor Harry, Camille Noel, Todd Pawlicki, Sasa Mutic, Bin Cai
PURPOSE: To evaluate the level of risk involved in treatment planning system (TPS) commissioning using a manual test procedure, and to compare the associated process-based risk to that of an automated commissioning process (ACP) by performing an in-depth failure modes and effects analysis (FMEA). METHODS: The authors collaborated to determine the potential failure modes of the TPS commissioning process using 1) approaches involving manual data measurement, modeling, and validation tests HYPERLINK \l "Fra98" 1, HYPERLINK \l "Smi15" 2 and 2) an automated process utilizing application programming interface (API) scripting, pre-loaded and pre-modeled standard radiation beam data, digital heterogeneous phantom, and an automated commissioning test suite (ACTS)...
April 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28418675/electric-field-induced-reversible-switching-of-the-magnetic-easy-axis-in-co-bifeo3-on-srtio3
#7
Tieren Gao, Xiaohang Zhang, William Ratcliff, Shingo Maruyama, Makoto Murakami, Anbusathaiah Varatharajan, Zahra Yamani, Peijie Chen, Ke Wang, Huairuo Zhang, Robert Shull, Leonid A Bendersky, John Unguris, Ramamoorthy Ramesh, Ichiro Takeuchi
Electric-field (E-field) control of magnetism enabled by multiferroic materials has the potential to revolutionize the landscape of present memory devices plagued with high energy dissipation. To date, this E-field controlled multiferroic scheme has only been demonstrated at room temperature using BiFeO3 films grown on DyScO3, a unique and expensive substrate, which gives rise to a particular ferroelectric domain pattern in BiFeO3. Here, we demonstrate reversible electric-field-induced switching of the magnetic state of the Co layer in Co/BiFeO3 (BFO) (001) thin film heterostructures fabricated on (001) SrTiO3 (STO) substrates...
April 20, 2017: Nano Letters
https://www.readbyqxmd.com/read/28414217/selection-of-group-specific-pae-binding-dna-aptamers-via-rational-designed-target-immobilization-and-applications-for-ultrasensitive-and-highly-selective-detection-of-paes
#8
Yu Han, Donglin Diao, Zhangwei Lu, Xiaoning Li, Qian Guo, Yumeng Huo, Qing Xu, Youshan Li, Sheng-Li Cao, Jianchun Wang, Yuan Wang, Jiaxing Zhao, Zhongfeng Li, Miao He, Zhaofeng Luo, Xinhui Lou
Phthalic acid esters(PAEs) are ubiquitous in the environment and some of them are recognized as endocrine disruptors that cause concerns on ecosystem functioning and public health. Due to the diversity of PAEs in the environment, there is a vital need to detect the total concentration of PAEs in a timely and low-cost way. To fulfill this requirement, it is highly desired to obtain group-specific PAE binders that are specific to the basic PAE skeleton. In this study, for the first time we have identified the group-specific PAE-binding aptamers via rational designed target immobilization...
April 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28413259/materials-genome-in-action-identifying-the-performance-limits-of-physical-hydrogen-storage
#9
Aaron W Thornton, Cory M Simon, Jihan Kim, Ohmin Kwon, Kathryn S Deeg, Kristina Konstas, Steven J Pas, Matthew R Hill, David A Winkler, Maciej Haranczyk, Berend Smit
The Materials Genome is in action: the molecular codes for millions of materials have been sequenced, predictive models have been developed, and now the challenge of hydrogen storage is targeted. Renewably generated hydrogen is an attractive transportation fuel with zero carbon emissions, but its storage remains a significant challenge. Nanoporous adsorbents have shown promising physical adsorption of hydrogen approaching targeted capacities, but the scope of studies has remained limited. Here the Nanoporous Materials Genome, containing over 850 000 materials, is analyzed with a variety of computational tools to explore the limits of hydrogen storage...
April 11, 2017: Chemistry of Materials: a Publication of the American Chemical Society
https://www.readbyqxmd.com/read/28412574/work-place-drug-testing-of-police-officers-after-thc-exposure-during-large-volume-cannabis-seizures
#10
Gregory S Doran, Ralph Deans, Carlo De Filippis, Chris Kostakis, Julia A Howitt
Police officers responsible for the seizure and removal of illegally grown cannabis plants from indoor and outdoor growing operations face the prospect of THC exposure while performing their work duties. As a result, a study investigating the amount of THC on hands and uniforms of officers during raids on cannabis growing houses (CGHs) and forest cannabis plantations (FCPs) and in the air at these sites was conducted. Swabs of gloves/hands, chests, and heads/necks were collected and analysed for THC. Results of hand swabs indicated that officers removing plants from FCPs were exposed to THC concentrations up to 20 times those involved in raids at CGHs, which was mainly associated with the number and size of plants seized...
April 2, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28410185/-googling-for-cancer-an-infodemiological-assessment-of-online-search-interests-in-australia-canada-new-zealand-the-united-kingdom-and-the-united-states
#11
Forough Foroughi, Alfred K-Y Lam, Megan S C Lim, Nassim Saremi, Alireza Ahmadvand
BACKGROUND: The infodemiological analysis of queries from search engines to shed light on the status of various noncommunicable diseases has gained increasing popularity in recent years. OBJECTIVE: The aim of the study was to determine the international perspective on the distribution of information seeking in Google regarding "cancer" in major English-speaking countries. METHODS: We used Google Trends service to assess people's interest in searching about "Cancer" classified as "Disease," from January 2004 to December 2015 in Australia, Canada, New Zealand, the United Kingdom, and the United States...
May 4, 2016: JMIR Cancer
https://www.readbyqxmd.com/read/28409816/regenerated-volume-gratings-in-pmma-after-femtosecond-laser-writing
#12
Yu Matushiro, Saulius Juodkazis, Koji Hatanaka, Wataru Watanabe
Self-regeneration of volume gratings recorded inside polymethyl methacrylate (PMMA) after 70-100 days is demonstrated. First, volume gratings were made inside PMMA by femtosecond laser writing. The diffraction efficiency of the gratings reached the maximum-was regenerated-following an initial slow decrease within the first several days after the fabrication. Time-lapse measurements of the diffraction efficiency in both top-plane (as laser written) and side-plane illumination were used to monitor changes of the diffraction efficiency...
April 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28403513/a-new-negative-and-positive-gas-ion-source-for-isotope-ratio-mass-spectrometry
#13
Tomasz Pieńkos, Stanisław Halas
RATIONALE: The goal of this research was to construct an effective gas ion source for isotope ratio mass spectrometry, which generates sufficiently strong and stable ion beams for multiple isotope ratio analysis of sulfur and oxygen from readily available gases such as SO2 , CO2 , CO, O2 and chlorine from CH3 Cl gas. METHODS: By means of a 60° sector mass spectrometer equipped with a new type of sensitive ion source and with a dual inlet system and triple collector assembly, we have measured (34) S/(32) S and challenging (36) S/(32) S isotope ratios using positive sulfur ions generated from SO2 gas...
April 12, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28403155/fruit-consumption-and-physical-activity-in-relation-to-all-cause-and-cardiovascular-mortality-among-70-000-chinese-adults-with-pre-existing-vascular-disease
#14
Xiaocao Tian, Huaidong Du, Liming Li, Derrick Bennett, Ruqin Gao, Shanpeng Li, Shaojie Wang, Yu Guo, Zheng Bian, Ling Yang, Yiping Chen, Junshi Chen, Yan Gao, Min Weng, Zengchang Pang, Baofa Jiang, Zhengming Chen
OBJECTIVES: To assess the associations of fresh fruit consumption and total physical activity with all-cause and cardiovascular mortality among Chinese adults who have been diagnosed with cardiovascular disease (CVD) or hypertension. METHODS: During 2004-08, the China Kadoorie Biobank study recruited 70,047 adults, aged 30-79 years, with physician-diagnosed stroke or transient ischaemic attack, ischemic heart disease, or hypertension. Information on diet and physical activity was collected using an interviewer-administered electronic questionnaire...
2017: PloS One
https://www.readbyqxmd.com/read/28402737/comparison-of-polymerization-shrinkage-physical-properties-and-marginal-adaptation-of-flowable-and-restorative-bulk-fill-resin-based-composites
#15
J H Jung, S H Park
PURPOSE: The purpose of this study was to compare the marginal adaptation of two flowable bulk fill resin-based composites (FB-RBCs), two restorative bulk fill resin-based composites (RB-RBCs), and one regular incremental-fill RBC in MOD cavities in vitro. Additionally, the influence of linear polymerization shrinkage, shrinkage force, flexural modulus, and bottom/top surface hardness ratio on the marginal adaptation was evaluated. METHODS: A Class II MOD cavity was prepared in 40 extracted sound lower molars...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402243/use-of-the-national-heart-lung-and-blood-institute-data-repository
#16
Sean A Coady, George A Mensah, Elizabeth L Wagner, Miriam E Goldfarb, Denise M Hitchcock, Carol A Giffen
Background Research on data sharing from clinical trials has focused on elucidating perceptions, barriers, and attitudes among trialists and study participants with respect to sharing data. However, little information exists regarding utilization or associated publication of articles once clinical trial data have been widely shared. Methods We analyzed administrative records of investigator requests for data access, linked publications, and bibliometrics to describe the use of the National Heart, Lung, and Blood Institute data repository...
March 29, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28397967/the-association-between-dementia-and-epilepsy-a-systematic-review-and-meta-analysis
#17
Ann Subota, Tram Pham, Nathalie Jetté, Khara Sauro, Diane Lorenzetti, Jayna Holroyd-Leduc
OBJECTIVE: Dementia is among the top 15 conditions with the most substantial increase in burden of disease in the past decade, and along with epilepsy, among the top 25 causes of years lived with disability worldwide. The epidemiology of dementia in persons with epilepsy, and vice versa, is not well characterized. The purpose of this systematic review was to examine the prevalence, incidence, and reported risk factors for dementia in epilepsy and epilepsy in dementia. METHODS: Embase, PsycINFO, MEDLINE, and the Cochrane databases were searched from inception...
April 11, 2017: Epilepsia
https://www.readbyqxmd.com/read/28396539/transcriptome-analysis-of-human-reninomas-as-an-approach-to-understanding-juxtaglomerular-cell-biology
#18
Alexandre G Martini, Lucie K Xa, Marie-Josée Lacombe, Alexis Blanchet-Cohen, Chantal Mercure, Benjamin Haibe-Kains, Edith C H Friesema, Anton H van den Meiracker, Kenneth W Gross, Michel Azizi, Pierre Corvol, Geneviève Nguyen, Timothy L Reudelhuber, A H Jan Danser
Renin, a key component in the regulation of blood pressure in mammals, is produced by the rare and highly specialized juxtaglomerular cells of the kidney. Chronic stimulation of renin release results in a recruitment of new juxtaglomerular cells by the apparent conversion of adjacent smooth muscle cells along the afferent arterioles. Because juxtaglomerular cells rapidly dedifferentiate when removed from the kidney, their developmental origin and the mechanism that explains their phenotypic plasticity remain unclear...
April 10, 2017: Hypertension
https://www.readbyqxmd.com/read/28390718/lining-bunker-walls-with-oxygen-barrier-film-reduces-nutrient-losses-in-corn-silages
#19
L M Lima, J P Dos Santos, D R Casagrande, C L S Ávila, M S Lara, T F Bernardes
The objective of this study was to evaluate 2 systems for covering corn silage in bunker silos. The first system consisted of a sheet of 45-μm-thick oxygen barrier film (OB, polyethylene + ethylene-vinyl alcohol) placed along the length of the sidewall before filling. After filling, the excess film was pulled over the wall on top of the silage, and a sheet of polyethylene was placed on top. The second system involved using a standard sheet (ST) of 180-μm-thick polyethylene film. Eight commercial bunker silos were divided into 2 parts lengthwise so that one-half of the silo was covered with OB and the other half with a ST system...
April 5, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28390055/extracorporeal-co2-removal-by-hemodialysis-in-vitro-model-and-feasibility
#20
Alexandra G May, Ayan Sen, Matthew E Cove, John A Kellum, William J Federspiel
BACKGROUND: Critically ill patients with acute respiratory distress syndrome and acute exacerbations of chronic obstructive pulmonary disease often develop hypercapnia and require mechanical ventilation. Extracorporeal carbon dioxide removal can manage hypercarbia by removing carbon dioxide directly from the bloodstream. Respiratory hemodialysis uses traditional hemodialysis to remove CO2 from the blood, mainly as bicarbonate. In this study, Stewart's approach to acid-base chemistry was used to create a dialysate that would maintain blood pH while removing CO2 as well as determine the blood and dialysate flow rates necessary to remove clinically relevant CO2 volumes...
December 2017: Intensive Care Medicine Experimental
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