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https://www.readbyqxmd.com/read/28535599/monitoring-spatiotemporal-variations-in-nutrients-in-a-large-drinking-water-reservoir-and-their-relationships-with-hydrological-and-meteorological-conditions-based-on-landsat-8-imagery
#1
Yuan Li, Yunlin Zhang, Kun Shi, Guangwei Zhu, Yongqiang Zhou, Yibo Zhang, Yulong Guo
Nutrient enrichment is a major cause of water eutrophication, and variations in nutrient enrichment are influenced by environmental changes and anthropogenic activities. Accurately estimating nutrient concentrations and understanding their relationships with environmental factors are vital to develop nutrient management strategies to mitigate eutrophication. Landsat 8 Operational Land Imager (OLI) data is used to estimate nutrient concentrations and analyze their responses to hydrological and meteorological conditions...
May 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28535478/the-effect-of-billboard-design-specifications-on-driving-a-pilot-study
#2
Hadas Marciano, Pe'erly Setter
Decades of research on the effects of advertising billboards on road accident rates, driver performance, and driver visual scanning behavior, has produced no conclusive findings. We suggest that road safety researchers should shift their focus and attempt to identify the billboard characteristics that are most distracting to drivers. This line of research may produce concrete guidelines for permissible billboards that would be likely to reduce the influence of the billboards on road safety. The current study is a first step towards this end...
May 20, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28535477/the-effect-of-crash-characteristics-on-cyclist-injuries-an-analysis-of-virginia-automobile-bicycle-crash-data
#3
Erin Robartes, T Donna Chen
This paper examines bicyclist, automobile driver, vehicle, environmental, and roadway characteristics that influence cyclist injury severity in order to determine which factors should be addressed to mitigate the worst bicyclist injuries. An ordered probit model is used to examine single bicycle-single vehicle crashes from Virginia police crash report data from 2010 to 2014. Five injury severity levels are considered: fatalities, severe injuries, minor or possible injuries, no apparent injuries, and no injury...
May 20, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28535370/epithelial-patterning-morphogenesis-and-evolution-drosophila-eggshell-as-a-model
#4
REVIEW
Miriam Osterfield, Celeste A Berg, Stanislav Y Shvartsman
Understanding the mechanisms driving tissue and organ formation requires knowledge across scales. How do signaling pathways specify distinct tissue types? How does the patterning system control morphogenesis? How do these processes evolve? The Drosophila egg chamber, where EGF and BMP signaling intersect to specify unique cell types that construct epithelial tubes for specialized eggshell structures, has provided a tractable system to ask these questions. Work there has elucidated connections between scales of development, including across evolutionary scales, and fostered the development of quantitative modeling tools...
May 22, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28535340/optical-binding-of-nanowires
#5
Stephen H Simpson, Pavel Zemanek, Onofrio M Marago, Philip H Jones, Simon Hanna
Multiple scattering of light induces structured interactions, or optical binding forces, between collections of small particles. This has been extensively studied in the case of micro-spheres. However, binding forces are strongly shape dependent: here, we turn our attention to dielectric nanowires. Using a novel numerical model we uncover rich behaviour. The extreme geometry of the nanowires produces a sequence of stationary and dynamic states. In linearly polarized light, thermally stable ladder-like structures emerge...
May 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28535339/ecophysiological-examination-of-the-lake-erie-microcystis-bloom-in-2014-linkages-between-biology-and-the-water-supply-shutdown-of-toledo-ohio
#6
Morgan Michelle Steffen, Timothy W Davis, Robert Michael McKay, George S Bullerjahn, Lauren E Krausfeldt, Joshua M A Stough, Michelle L Neitzey, Naomi E Gilbert, Gregory L Boyer, Thomas H Johengen, Duane C Gossiaux, Ashley M Burtner, Danna Palladino, Mark Rowe, Gregory J Dick, Kevin Meyer, Shawn Levy, Braden Boone, Richard Stumpf, Timothy Wynne, Paul V Zimba, Danielle B Gutierrez, Steven W Wilhelm
Annual cyanobacterial blooms dominated by Microcystis have occurred in western Lake Erie (USA/Canada) during summer months since 1995. The production of toxins by bloom-forming cyanobacteria can lead to drinking water crises, such as the one experienced by the city of Toledo in August of 2014, when the city was rendered without drinking water for > 2 days. It is important to understand the conditions and environmental cues that were driving this specific bloom to provide a scientific framework for management of future bloom events...
May 23, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28535179/reduced-frequency-of-cells-latently-infected-with-replication-competent-hiv-1-in-virally-suppressed-individuals-living-in-rakai-uganda
#7
Jessica L Prodger, Jun Lai, Steven J Reynolds, Jeanne C Keruly, Richard D Moore, Jingo Kasule, Taddeo Kityamuweesi, Paul Buule, David Serwadda, Martha Nason, Adam A Capoferri, Stephen F Porcella, Robert F Siliciano, Andrew D Redd, Janet D Siliciano, Thomas C Quinn
Background: HIV-1 persists in latently infected resting CD4+ T cells (rCD4), posing a major barrier to curing HIV-1 infection. Previous studies have quantified this pool of latently infected cells in Americans; however, no study has quantified this reservoir in sub-Saharan Africans, who make up the largest population of HIV-1-infected individuals globally. Methods: Peripheral blood was collected from 70 virally suppressed HIV-1-infected individuals from Rakai District, Uganda, who had initiated antiretroviral therapy (ART) during chronic infection...
May 23, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28535155/elevated-apobec3b-expression-drives-a-kataegic-like-mutation-signature-and-replication-stress-related-therapeutic-vulnerabilities-in-p53-defective-cells
#8
Jenni Nikkilä, Rahul Kumar, James Campbell, Inger Brandsma, Helen N Pemberton, Fredrik Wallberg, Kinga Nagy, Ildikó Scheer, Beata G Vertessy, Artur A Serebrenik, Valentina Monni, Reuben S Harris, Stephen J Pettitt, Alan Ashworth, Christopher J Lord
BACKGROUND: Elevated APOBEC3B expression in tumours correlates with a kataegic pattern of localised hypermutation. We assessed the cellular phenotypes associated with high-level APOBEC3B expression and the influence of p53 status on these phenotypes using an isogenic system. METHODS: We used RNA interference of p53 in cells with inducible APOBEC3B and assessed DNA damage response (DDR) biomarkers. The mutational effects of APOBEC3B were assessed using whole-genome sequencing...
May 23, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28535148/stochastic-gene-expression-conditioned-on-large-deviations
#9
Jordan M Horowitz, Rahul V Kulkarni
The intrinsic stochasticity of gene expression can give rise to large fluctuations and rare events that drive phenotypic variation in a population of genetically identical cells. Characterizing the fluctuations that give rise to such rare events motivates the analysis of large deviations in stochastic models of gene expression. Recent developments in non-equilibrium statistical mechanics have led to a framework for analyzing Markovian processes conditioned on rare events and for representing such processes by conditioning-free driven Markovian processes...
May 23, 2017: Physical Biology
https://www.readbyqxmd.com/read/28534873/molecular-indicators-of-stress-induced-neuroinflammation-in-a-mouse-model-simulating-features-of-post-traumatic-stress-disorder
#10
S Muhie, A Gautam, N Chakraborty, A Hoke, J Meyerhoff, R Hammamieh, M Jett
A social-stress mouse model was used to simulate features of post-traumatic stress disorder (PTSD). The model involved exposure of an intruder (male C57BL/6) mouse to a resident aggressor (male SJL) mouse for 5 or 10 consecutive days. Transcriptome changes in brain regions (hippocampus, amygdala, medial prefrontal cortex and hemibrain), blood and spleen as well as epigenome changes in the hemibrain were assayed after 1- and 10-day intervals following the 5-day trauma or after 1- and 42-day intervals following the 10-day trauma...
May 23, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28534709/mdscs-are-involved-in-the-protumorigenic-potentials-of-gm-csf-in-colitis-associated-cancer
#11
Ning Ma, Qilin Liu, Lin Hou, Yalin Wang, Ziling Liu
Chronic inflammation is thought to be a major driving force for the development of colitis-associated colorectal cancer (CAC). As one member of proinflammatory cytokine family, granulocyte macrophage colony-stimulating factor (GM-CSF) has been identified to play a key role in CAC pathogenesis recently. The underlying mechanisms, however, remain largely unknown. In this study, we found that myeloid-derived suppressor cells (MDSCs) accumulated increasingly in the lesions during the progression from colitis to cancer, which was critical for CAC formation...
May 1, 2017: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/28534644/a-spectral-power-analysis-of-driving-behavior-changes-during-the-transition-from-non-distraction-to-distraction
#12
Yuan Wang, Shan Bao, Wenjun Du, Zhirui Ye, James R Sayer
OBJECTIVE: This paper investigated and compared frequency-domain and time-domain characteristics of drivers' behavior before and after the start of distracted driving. METHOD: Data from an existing naturalistic driving study were used. Fast Fourier transform (FFT) was applied for the frequency domain analysis to explore drivers' behavior pattern changes between non-distracted (pre-starting of visual-manual task) and distracted (post-starting of visual-manual task) driving periods...
May 23, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28534609/au-promoted-nickel-iron-layered-double-hydroxide-nanoarrays-a-modular-catalyst-enabling-high-performance-oxygen-evolution
#13
Wenxin Zhu, Lizhi Liu, Zhihao Yue, Wentao Zhang, Xiaoyue Yue, Jing Wang, Shaoxuan Yu, Li Wang, Jianlong Wang
Oxygen evolution reaction (OER) has played a pivotal role in many energy conversion and storage technologies like water electrolysis, fuel cells, and metal-air batteries. However, the slow kinetics of OER limit the performance and commercialization of such devices. Herein, we report on NiFe LDH@Au hybrid nanoarrays on Ni foam for much enhanced OER. By hybridization of electronegative Au and NiFe LDH with intrinsic remarkable OER catalytic activity, this modular electrode could drive an overall ultrahigh-performance and robust OER in base with the demand of overpotentials of only 221, 235 and 270 mV to afford 50, 100 and 500 mA cm-2, respectively...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28534531/unravelling-the-biology-of-sclc-implications-for-therapy
#14
REVIEW
Joshua K Sabari, Benjamin H Lok, James H Laird, John T Poirier, Charles M Rudin
Small-cell lung cancer (SCLC) is an aggressive malignancy associated with a poor prognosis. First-line treatment has remained unchanged for decades, and a paucity of effective treatment options exists for recurrent disease. Nonetheless, advances in our understanding of SCLC biology have led to the development of novel experimental therapies. Poly [ADP-ribose] polymerase (PARP) inhibitors have shown promise in preclinical models, and are under clinical investigation in combination with cytotoxic therapies and inhibitors of cell-cycle checkpoints...
May 23, 2017: Nature Reviews. Clinical Oncology
https://www.readbyqxmd.com/read/28534406/relationships-between-exciton-dissociation-and-slow-recombination-within-znse-cds-and-cdse-cds-dot-in-rod-heterostructures
#15
Amanda N Grennell, James K Utterback, Orion M Pearce, Molly B Wilker, Gordana Dukovic
Type-II and quasi type-II heterostructure nanocrystals are known to exhibit extended excited-state lifetimes compared to their single material counterparts because of reduced wavefunction overlap between the electron and hole. However, due to fast and efficient hole trapping and non-uniform morphologies, the photophysics of dot-in-rod heterostructures are more rich and complex than this simple picture. Using transient absorption spectroscopy, we observe that the behavior of electrons in the CdS "rod" or "bulb" regions of non-uniform ZnSe/CdS and CdSe/CdS dot-in-rods is similar regardless of the "dot" material, which supports previous work demonstrating that hole trapping and particle morphology drive electron dynamics...
May 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28534178/effects-of-foliage-litter-of-a-pioneer-shrub-artemisia-halodendron-on-germination-from-the-soil-seedbank-in-a-semi-arid-sandy-grassland-in-china
#16
Yongqing Luo, Xueyong Zhao, Yuqiang Li, Tao Wang
Vegetation recovery during succession is an important process for ecological restoration of the soil, especially in degraded sandy land. However, the driving mechanisms, such as how a pioneer species competes with other species, is uncertain. In China's Horqin Sandy Land, Artemisia halodendron is an important shrub that is common on semi-fixed dunes, where it replaces Agriophyllum squarrosum during succession, and is an important indicator species of the second stage of dune stabilization. However, how it outcompetes other species is still unclear...
May 22, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28534080/pathologic-complete-response-rates-after-neoadjuvant-treatment-in-rectal-cancer-an-analysis-of-the-national-cancer-database
#17
Patrick D Lorimer, Benjamin M Motz, Russell C Kirks, Danielle M Boselli, Kendall K Walsh, Roshan S Prabhu, Joshua S Hill, Jonathan C Salo
BACKGROUND: Pathologic complete response (pCR) of rectal cancer following neoadjuvant therapy is associated with decreased local recurrence and increased overall survival. This study utilizes a national dataset to identify predictors of pCR in patients with rectal cancer. METHODS: The National Cancer Database was queried for patients with nonmetastatic rectal cancer (2004-2014) who underwent neoadjuvant therapy and surgical resection. Unadjusted associations were assessed using rank-sum tests and χ (2) tests where appropriate...
May 22, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28533896/sex-specific-differences-in-functional-traits-and-resource-acquisition-in-five-cycad-species
#18
Christopher Krieg, James E Watkins, Sally Chambers, Chad E Husby
Selective pressures acting on plant life histories can drive extreme specialization. One example of such specialization is the evolution of dioecious breeding systems. Evolutionary and ecological theory posits that dioecy may subject male and female individuals to different selective pressures and result in unique sex-mediated adaptive traits related to resource allocation and ecophysiology. Cycads are the earliest diverging lineage of seed plants with strict dioecy, yet we know almost nothing about the ecology and physiology of this group...
March 2017: AoB Plants
https://www.readbyqxmd.com/read/28533820/medip-seq-and-ncpg-analyses-illuminate-sexually-dimorphic-methylation-of-gonadal-development-genes-with-high-historic-methylation-in-turtle-hatchlings-with-temperature-dependent-sex-determination
#19
Srihari Radhakrishnan, Robert Literman, Beatriz Mizoguchi, Nicole Valenzuela
BACKGROUND: DNA methylation alters gene expression but not DNA sequence and mediates some cases of phenotypic plasticity. Temperature-dependent sex determination (TSD) epitomizes phenotypic plasticity where environmental temperature drives embryonic sexual fate, as occurs commonly in turtles. Importantly, the temperature-specific transcription of two genes underlying gonadal differentiation is known to be induced by differential methylation in TSD fish, turtle and alligator. Yet, how extensive is the link between DNA methylation and TSD remains unclear...
2017: Epigenetics & Chromatin
https://www.readbyqxmd.com/read/28533780/innate-immune-function-of-mitochondrial-metabolism
#20
REVIEW
David Sancho, Michel Enamorado, Johan Garaude
Sensing of microbe-associated molecular patterns or danger signals by innate immune receptors drives a complex exchange of information. Innate receptor signaling not only triggers transcriptional events but also induces profound changes in metabolic fluxes, redox balance, and metabolite abundance thereby influencing immune cell function. Mitochondria are at the core of metabolic adaptation to the changing environment. The close interaction between mitochondrial metabolism and immune signaling has emerged as a central regulator of innate sensing...
2017: Frontiers in Immunology
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