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https://www.readbyqxmd.com/read/29457773/optical-waveguide-and-room-temperature-high-quality-nanolasers-from-tin-catalyzed-cdsse-nanostructures
#1
Pengfei Guo, Xia Shen, Baolong Zhang, Haibin Sun, Zhijun Zou, Wenchao Yang, Ke Gong, Yongsong Luo
A simple two-step CVD method is developed to realize the growth of high-quality tin-catalyzed CdSSe alloy nanowires. Microstructural characterizations demonstrate that these wires are high-quality crystalline nanostructures. Local photoluminescence investigation of these nanostructures shows a typical band edge emission at 656 nm with a full-width at half-maximum of 22.3 nm. Optical waveguide measurement along an individual nanowire indicates that the output signal of the guided light has a rapid linear decrease accompanied with maximum redshift about 109 meV after the transmission of 102 μm...
February 19, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29457539/vocalization-development-in-common-marmosets-for-neurodegenerative-translational-modeling
#2
Corinne A Jones, Mary K Duffy, Sarah A Hoffman, Nancy J Schultz-Darken, Katarina M Braun, Michelle R Ciucci, Marina E Emborg
Objectives In order to facilitate the study of vocalizations in emerging genetic common marmoset models of neurodegenerative disorders, we aimed to analyze call-type changes across age in a translational research environment. We hypothesized that acoustic parameters of vocalizations would change with age, reflecting growth of the vocal apparatus and a maturation of control needed to make adult-like calls. Methods Nineteen developing common marmosets were longitudinally video- and audio-recorded between the ages of 1-149 days in a naturalistic setting without any vocalization elicitation protocol...
February 19, 2018: Neurological Research
https://www.readbyqxmd.com/read/29456292/cbm-maze-scores-as-indicators-of-reading-level-and-growth-for-seventh-grade-students
#3
Siuman Chung, Christine A Espin, Claire E Stevenson
The technical adequacy of CBM maze-scores as indicators of reading level and growth for seventh-grade secondary-school students was examined. Participants were 452 Dutch students who completed weekly maze measures over a period of 23 weeks. Criterion measures were school level, dyslexia status, scores and growth on a standardized reading test. Results supported the technical adequacy of maze scores as indicators of reading level and growth. Alternate-form reliability coefficients were significant and intermediate to high...
2018: Reading and Writing
https://www.readbyqxmd.com/read/29456172/effect-of-pediatric-growth-on-cervical-spine-kinematics-and-deformations-in-automotive-crashes
#4
Victor S Alvarez, Svein Kleiven
Finite element (FE) models are a powerful tool that can be used to understand injury mechanisms and develop better safety systems. This study aims to extend the understanding of pediatric spine biomechanics, where there is a paucity of studies available. A newly developed and continuously scalable FE model was validated and scaled to 1.5-, 3-, 6-, 10-, 14- and 18-year-old using a non-linear scaling technique, accounting for local topological changes. The oldest and youngest ages were also scaled using homogeneous geometric scaling...
February 8, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29455677/the-gene-environmental-architecture-of-the-development-of-adolescent-substance-use
#5
Frank Vitaro, Daniel J Dickson, Mara Brendgen, Brett Laursen, Ginette Dionne, Michel Boivin
BACKGROUND: Using a longitudinal twin design and a latent growth curve/autoregressive approach, this study examined the genetic-environmental architecture of substance use across adolescence. METHODS: Self-reports of substance use (i.e. alcohol, marijuana) were collected at ages 13, 14, 15, and 17 years from 476 twin pairs (475 boys, 477 girls) living in the Province of Quebec, Canada. Substance use increased linearly across the adolescent years. RESULTS: ACE modeling revealed that genetic, as well as shared and non-shared environmental factors explained the overall level of substance use and that these same factors also partly accounted for growth in substance use from age 13 to 17...
February 19, 2018: Psychological Medicine
https://www.readbyqxmd.com/read/29455366/phospholipase-d%C3%AE-assists-to-cortical-microtubule-recovery-after-salt-stress
#6
Jindřiška Angelini, Stanislav Vosolsobě, Petr Skůpa, Angela Yeuan Yen Ho, Erica Bellinvia, Olga Valentová, Jan Marc
The dynamic microtubule cytoskeleton plays fundamental roles in the growth and development of plants including regulation of their responses to environmental stress. Plants exposed to hyper-osmotic stress commonly acclimate, acquiring tolerance to variable stress levels. The underlying cellular mechanisms are largely unknown. Here, we show, for the first time, by in vivo imaging approach that linear patterns of phospholipase Dδ match the localization of microtubules in various biological systems, validating previously predicted connection between phospholipase Dδ and microtubules...
January 24, 2018: Protoplasma
https://www.readbyqxmd.com/read/29455341/do-callous-unemotional-traits-and-conduct-disorder-symptoms-predict-the-onset-and-development-of-adolescent-substance-use
#7
Sarah L Anderson, Yao Zheng, Robert J McMahon
Despite strong evidence of the relationship between conduct disorder (CD) symptoms and substance use, it is unclear how callous-unemotional (CU) traits predict substance use over and above CD symptoms, and their potential interaction. This study used data from 753 participants followed from grade 7 to 2-years post-high school. Latent growth curve models showed that CU traits predicted the onset of cigarette use, alcohol misuse, and a substance use composite at grade 7 only when no CD symptoms were present. Among those without CD symptoms, boys showed greater change in the odds of using cigarettes, and were more likely to misuse alcohol or use any substance at grade 7 than girls...
February 17, 2018: Child Psychiatry and Human Development
https://www.readbyqxmd.com/read/29455193/growth-trajectory-in-children-with-type-1-diabetes-mellitus-the-impact-of-insulin-treatment-and-metabolic-control
#8
Carla Bizzarri, Tiziana Antonia Timpanaro, Maria Cristina Matteoli, Ippolita Patrizia Patera, Marco Cappa, Stefano Cianfarani
BACKGROUND: Linear growth was reported to be negatively affected by type 1 diabetes mellitus (T1DM), in relation to disease duration and poor metabolic control. It is unclear whether a subtle growth failure still persists despite the optimization of therapy. Our aim was to analyse pubertal growth, adult height, and metabolic profile in a cohort of children with T1DM undergoing intensive insulin treatment by multiple daily injections or continuous subcutaneous insulin infusion (CSII). METHODS: One-hundred and four children (51 males) with prepubertal onset of T1DM were prospectively followed up to final height attainment...
February 16, 2018: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/29454554/geospatial-inequalities-and-determinants-of-nutritional-status-among-women-and-children-in-afghanistan-an-observational-study
#9
Nadia Akseer, Zaid Bhatti, Taufiq Mashal, Sajid Soofi, Rahim Moineddin, Robert E Black, Zulfiqar A Bhutta
BACKGROUND: Undernutrition is a pervasive condition in Afghanistan, and prevalence is among the highest in the world. We aimed to comprehensively assess district-level geographical disparities and determinants of nutritional status (stunting, wasting, or underweight) among women and children in Afghanistan. METHODS: The study used individualised data from the recent Afghanistan National Nutrition Survey 2013. Outcome variables were based on growth and weight anthropometry data, which we analysed linearly as Z scores and as dichotomous categories...
February 14, 2018: Lancet Global Health
https://www.readbyqxmd.com/read/29454312/effects-of-a-wide-range-of-dietary-forage-to-concentrate-ratios-on-nutrient-utilization-and-hepatic-transcriptional-profiles-in-limit-fed-holstein-heifers
#10
Haitao Shi, Jun Zhang, Shengli Li, Shoukun Ji, Zhijun Cao, Hongtao Zhang, Yajing Wang
BACKGROUND: Improving the efficiency of animal production is a relentless pursuit of ruminant producers. Energy utilization and partition can be affected by dietary composition and nutrient availability. Furthermore, the liver is the central metabolic intersection in cattle. However, the specific metabolic changes in the liver under conditions of limit-feeding remain unclear and require further study. The present study aimed to elucidate the effects of a wide range of dietary forage:concentrate ratios (F:C) on energy utilization, and identify potential changes in molecular metabolism by analyzing hepatic transcriptional profiles...
February 17, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29454210/sunshine-duration-reconstruction-in-the-southeastern-tibetan-plateau-based-on-tree-ring-width-and-its-relationship-to-volcanic-eruptions
#11
Changfeng Sun, Yu Liu, Huiming Song, Qiufang Cai, Qiang Li, Lu Wang, Ruochen Mei, Congxi Fang
Sunshine is as essential as temperature and precipitation for tree growth, but sunshine duration reconstructions based on tree rings have not yet been conducted in China. In this study, we presented a 497-year sunshine duration reconstruction for the southeastern Tibetan Plateau using a width chronology of Abies forrestii from the central Hengduan Mountains. The reconstruction accounted for 53.5% of the variance in the observed sunshine during the period of 1961-2013 based on a stable and reliable linear regression...
February 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29452375/1%C3%AE-hydroxycholecalciferol-improves-the-growth-performance-and-up-regulates-the-mrna-expression-of-vitamin-d-receptor-in-the-small-intestine-and-kidney-of-broiler-chickens
#12
J C Han, J G Wang, G H Chen, J L Zhang, N Zhang, H X Qu, Y Guo, Y F Yan, X J Yang
1α-Hydroxycholecalciferol (1α-OH-D3) is a vitamin D derivative. The objective of this study was to evaluate the effects of 1α-OH-D3 on the growth and the mRNA expression of vitamin D receptor (VDR) in the small intestine and kidney of chickens. A total of 240 males of one-day-old Ross 308 broilers was randomly assigned to 4 treatments with 5 replicates of 12 birds per replicate. Three levels of 1α-OH-D3 (1.25, 2.5, and 5 μg/kg) were added to a basal diet containing 0.50% calcium (Ca), 0.25% non-phytate phosphorus (NPP), and without supplemental cholecalciferol (vitamin D3)...
February 14, 2018: Poultry Science
https://www.readbyqxmd.com/read/29451723/clickable-polyamine-derivatives-as-chemical-probes-for-the-polyamine-transport-system
#13
Roeland Vanhoutte, Jan Pascal Kahler, Shaun Martin, Sarah van Veen, Steven Verhelst
Polyamines are essential for cell growth and differentiation, but their trafficking by the polyamine transport system is not fully understood. In this paper, we describe the synthesis of several azido-derivatized polyamines for easy conjugation by click chemistry. Attachment of a BODIPY-dye gave fluorescent polyamine probes, which were tested in cell culture. The linear probe series showed superior cellular uptake compared with the probes where the dye was attached to a branch on one of the central amines. Interestingly, the linear probes accumulated rapidly in cancer cells (MCF-7), but not in non-tumorigenic cells (MCF-10A)...
February 16, 2018: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/29451227/statural-growth-and-prevalence-of-endocrinopathies-in-relation-to-liver-iron-content-lic-in-adult-patients-with-beta-thalassemia-major-btm-and-sickle-cell-disease-scd
#14
Mohamed A Yassin, Ashraf T Soliman, Vincenzo De Sanctis, Mohammad Aj Abdula, Lubna M Riaz, Firdous F Ghori, Anil Yousaf, Abdulqadir J Nashwan, Sandara Abusamaan, Abbas Moustafa, Samah Kohla, Dina S Soliman
Despite regular blood transfusion and iron chelation therapy, growth impairment and pubertal delay are commonly seen in children and adolescents with transfusion-dependent Beta thalassaemia major (BTM) and sickle cell disease (SCD). We evaluated growth parameters and endocrine disorders in relation to the liver iron concentration (LIC) assessed by the Ferriscan® method in a cohort of adults with SCD (n =40) and BTM (n = 52) receiving blood transfusions and iron chelation therapy since early childhood. Before transfusion, hemoglobin concentration had not been less than 9 g/dl in the past 12 years; subcutaneous daily desferrioxamine was administered for all of them since early childhood (2- 5 years of age)...
February 16, 2018: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29450728/winter-vitamin-d-3-supplementation-does-not-increase-muscle-strength-but-modulates-the-igf-axis-in-young-children
#15
Charlotte Mortensen, Christian Mølgaard, Hanne Hauger, Michael Kristensen, Camilla T Damsgaard
PURPOSE: To explore whether muscle strength, the insulin-like growth factor axis (IGF-axis), height, and body composition were associated with serum 25-hydroxyvitamin D [25(OH)D] and affected by winter vitamin D supplementation in healthy children, and furthermore to explore potential sex differences. METHODS: We performed a double-blind, placebo-controlled, dose-response winter trial at 55ºN. A total of 117 children aged 4-8 years were randomly assigned to either placebo, 10, or 20 µg/day of vitamin D 3 for 20 weeks...
February 15, 2018: European Journal of Nutrition
https://www.readbyqxmd.com/read/29450661/monitoring-water-quality-in-a-hypereutrophic-reservoir-using-landsat-etm-and-oli-sensors-how-transferable-are-the-water-quality-algorithms
#16
Eliza S Deutsch, Ibrahim Alameddine, Mutasem El-Fadel
The launch of the Landsat 8 in February 2013 extended the life of the Landsat program to over 40 years, increasing the value of using Landsat to monitor long-term changes in the water quality of small lakes and reservoirs, particularly in poorly monitored freshwater systems. Landsat-based water quality hindcasting often incorporate several Landsat sensors in an effort to increase the temporal range of observations; yet the transferability of water quality algorithms across sensors remains poorly examined. In this study, several empirical algorithms were developed to quantify chlorophyll-a, total suspended matter (TSM), and Secchi disk depth (SDD) from surface reflectance measured by Landsat 7 ETM+ and Landsat 8 OLI sensors...
February 15, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29449143/gender-trends-in-academic-radiology-publication-in-the-united-states-revisited
#17
Erin E O'Connor, Pauline Chen, Brian Weston, Redmond Anderson, Timothy Zeffiro, Awad Ahmed, Thomas A Zeffiro
RATIONALE AND OBJECTIVES: Although substantial increases in publications by female academic radiologists have appeared over the last several decades, it is possible that the rate of increase is decreasing. We examined temporal trends in gender composition for full-time radiology faculty, radiology residents, and medical students over a 46-year period. METHODS: We examined authorship gender trends to determine if the increases in female authorship seen since 1970 have been sustained in recent years and whether female radiologists continue to publish in proportion to their numbers in academic departments...
February 12, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29448539/ag-fe%C3%A2-o%C3%A2-core-shell-surface-enhanced-raman-scattering-probe-for-trace-arsenate-detection
#18
Hang Sun, Shan Zeng, Yinxing Shang, Qinrong He
Developing an effective and reliable method for trace arsenic (As) detection is a prerequisite for improving the safety of drinking water. In this paper, we designed and prepared Ag@Fe3O4 core-shell nanoparticles (NPs), which were then used as Surface-Enhanced Raman Scattering (SERS) probe for trace arsenate (As(V)) detection. The Ag@Fe3O4 core-shell NPs were prepared by in situ growth of Fe3O4 NPs on the surface of AgNPs, which can effectively combine the strong adsorption ability of Fe3O4 nanoshells to As(V) with high SERS activity of Ag nanocores to decrease the detection limit...
February 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448443/two-length-scale-turbulence-model-for-self-similar-buoyancy-shock-and-shear-driven-mixing
#19
Brandon E Morgan, Oleg Schilling, Tucker A Hartland
The three-equation k-L-a turbulence model [B. Morgan and M. Wickett, Three-equation model for the self-similar growth of Rayleigh-Taylor and Richtmyer-Meshkov instabilities, Phys. Rev. E 91, 043002 (2015)PLEEE81539-375510.1103/PhysRevE.91.043002] is extended by the addition of a second length scale equation. It is shown that the separation of turbulence transport and turbulence destruction length scales is necessary for simultaneous prediction of the growth parameter and turbulence intensity of a Kelvin-Helmholtz shear layer when model coefficients are constrained by similarity analysis...
January 2018: Physical Review. E
https://www.readbyqxmd.com/read/29448403/entrance-and-escape-dynamics-for-the-typical-set
#20
Schuyler B Nicholson, Jonah S Greenberg, Jason R Green
According to the asymptotic equipartition property, sufficiently long sequences of random variables converge to a set that is typical. While the size and probability of this set are central to information theory and statistical mechanics, they can often only be estimated accurately in the asymptotic limit due to the exponential growth in possible sequences. Here we derive a time-inhomogeneous dynamics that constructs the properties of the typical set for all finite length sequences of independent and identically distributed random variables...
January 2018: Physical Review. E
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