keyword
MENU ▼
Read by QxMD icon Read
search

Gray

keyword
https://www.readbyqxmd.com/read/27915388/microbial-diversity-in-degraded-and-non-degraded-petroleum-samples-and-comparison-across-oil-reservoirs-at-local-and-global-scales
#1
Isabel Natalia Sierra-Garcia, Bruna M Dellagnezze, Viviane P Santos, Michel R Chaves B, Ramsés Capilla, Eugenio V Santos Neto, Neil Gray, Valeria M Oliveira
Microorganisms have shown their ability to colonize extreme environments including deep subsurface petroleum reservoirs. Physicochemical parameters may vary greatly among petroleum reservoirs worldwide and so do the microbial communities inhabiting these different environments. The present work aimed at the characterization of the microbiota in biodegraded and non-degraded petroleum samples from three Brazilian reservoirs and the comparison of microbial community diversity across oil reservoirs at local and global scales using 16S rRNA clone libraries...
December 3, 2016: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/27914286/multi-centre-field-evaluation-of-the-performance-of-the-trinity-biotech-uni-gold-hiv-1-2-rapid-test-as-a-first-line-screening-assay-for-gay-and-bisexual-men-compared-with-4th-generation-laboratory-immunoassays
#2
P Keen, D P Conway, P Cunningham, A McNulty, D L Couldwell, S C Davies, D E Smith, J Gray, M Holt, C C O'Connor, P Read, D Callander, G Prestage, R Guy
BACKGROUND: The Trinity Biotech Uni-Gold HIV test (Uni-Gold) is often used as a supplementary rapid test in testing algorithms. OBJECTIVE: To evaluate the operational performance of the Uni-Gold as a first-line screening test among gay and bisexual men (GBM) in a setting where 4th generation HIV laboratory assays are routinely used. STUDY DESIGN: We compared the performance of Uni-Gold with conventional HIV serology conducted in parallel among GBM attending 22 testing sites...
November 16, 2016: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/27914108/diagnostic-usefulness-of-dermoscopy-in-differentiating-lichen-aureus-from-nummular-eczema
#3
Kee Suck Suh, Jong Bin Park, Myeong Hyeon Yang, Soo Young Choi, Hyun Hwangbo, Min Soo Jang
Lichen aureus (LA) is a variant of pigmented purpuric dermatosis that is characterized clinically by rust macules, papules or plaques, mainly on the legs. In some cases, LA can be difficult to be distinguished from nummular eczema (NE) with the naked eye. Dermoscopy can be applied to skin lesions, revealing additional features that can be highly valuable for correct diagnosis. This study was conducted to investigate characteristic dermoscopic findings of LA and to identify distinctive features that can differentiate it from NE...
December 3, 2016: Journal of Dermatology
https://www.readbyqxmd.com/read/27914102/examining-temporal-effects-on-cancer-risk-in-the-international-nuclear-workers-study-inworks
#4
Robert D Daniels, Stephen J Bertke, David B Richardson, Elisabeth Cardis, Michael Gillies, Jacqueline A O'Hagan, Richard Haylock, Dominique Laurier, Klervi Leuraud, Monika Moissonnier, Isabelle Thierry-Chef, Ausrele Kesminiene, Mary K Schubauer-Berigan
The paper continues the series of publications from the International Nuclear Workers Study cohort (INWORKS) that comprises 308,297 workers from France, the United Kingdom and the United States, providing 8.2 million person-years of observation from a combined follow-up period (at earliest 1944 to at latest 2005). These workers' external radiation exposures were primarily to photons, resulting in an estimated average career absorbed dose to the colon of 17.4 milligray. The association between cumulative ionizing radiation dose and cancer mortality was evaluated in general relative risk models that describe modification of the excess relative risk (ERR) per gray (Gy) by time since exposure and age at exposure...
December 3, 2016: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/27914042/perfectionism-mediated-the-relationship-between-brain-structure-variation-and-negative-emotion-in-a-nonclinical-sample
#5
Di Wu, Kangcheng Wang, Dongtao Wei, Qunlin Chen, Xue Du, Junyi Yang, Jiang Qiu
In maladaptive respects, perfectionism reflects an individual's concern over making mistakes and doubting the quality of his or her own actions excessively, which would affect one's emotion. However, little is known about the neural mechanisms associated with the perfectionism and negative affect. In this study, voxel-based morphometry was performed to identify the brain regions underlying individual differences in perfectionism, which was measured by the Chinese Frost Multidimensional Perfectionism Scale (CFMPS), in a large sample of nonclinical young adults...
December 2, 2016: Cognitive, Affective & Behavioral Neuroscience
https://www.readbyqxmd.com/read/27913960/neuroimaging-abnormalities-in-clade-c-hiv-are-independent-of-tat-genetic-diversity
#6
Robert H Paul, Sarah Phillips, Jacqueline Hoare, David H Laidlaw, Ryan Cabeen, Gayla R Olbricht, Yuqing Su, Dan J Stein, Susan Engelbrecht, Soraya Seedat, Lauren E Salminen, Laurie M Baker, Jodi Heaps, John Joska
Controversy remains regarding the neurotoxicity of clade C human immunodeficiency virus (HIV-C). When examined in preclinical studies, a cysteine to serine substitution in the C31 dicysteine motif of the HIV-C Tat protein (C31S) results in less severe brain injury compared to other viral clades. By contrast, patient cohort studies identify significant neuropsychological impairment among HIV-C individuals independent of Tat variability. The present study clarified this discrepancy by examining neuroimaging markers of brain integrity among HIV-C individuals with and without the Tat substitution...
December 2, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27913587/suppressing-n-acetyl-l-aspartate-naa-synthesis-prevents-loss-of-neurons-in-a-murine-model-of-canavan-leukodystrophy
#7
Jiho Sohn, Peter Bannerman, Fuzheng Guo, Travis Burns, Laird Miers, Christopher Croteau, Naveen K Singhal, Jennifer A McDonough, David Pleasure
Canavan disease is a leukodystrophy caused by aspartoacylase (ASPA) deficiency. The lack of functional ASPA, an enzyme enriched in oligodendroglia that cleaves N-acetyl-L-aspartate (NAA) to acetate and L-aspartic acid, elevates brain NAA and causes "spongiform" vacuolation of superficial brain white matter and neighboring gray matter. In children with Canavan disease, neuroimaging shows early-onset dysmyelination and progressive brain atrophy. Neuron loss has been documented at autopsy in some cases. Prior studies have shown that mice homozygous for the Aspa nonsense mutation Nur7 also develop brain vacuolation...
December 2, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27913201/early-mortality-and-associated-factors-among-patients-with-stroke-admitted-to-a-large-teaching-hospital-in-tanzania
#8
Kigocha Okeng'o, Pilly Chillo, William K Gray, Richard W Walker, William Matuja
BACKGROUND: Stroke is a major cause of death worldwide and 85.5% of stroke deaths occur in low- and middle-income countries due to stroke. The aim of this study was to investigate correlates and predictors of 30-day mortality in stroke patients in urban Tanzania. METHODS: A prospective 30-day follow-up study was conducted at the Muhimbili National Hospital, Dar es Salaam, Tanzania. We recruited all patients with stroke seen at the Emergency Medicine Department and medical wards...
November 29, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27913165/larger-females-are-choosier-in-the-gray-treefrog-hyla-versicolor
#9
Michael C Kuczynski, Thomas Getty, Eben Gering
Individual variation in female mate choice has important implications for sexual trait evolution and the maintenance of phenotypic diversity. In this study we examined several potential drivers of individual variation in female choosiness for the well-studied, energetically expensive courtship signal of male gray treefrogs, Hyla versicolor. Specifically, we investigated the relationship between female choosiness and other female traits (female body size, physical condition, and age) using a costly choice playback experiment where females traveled different simulated distances to reach attractive mates...
November 29, 2016: Behavioural Processes
https://www.readbyqxmd.com/read/27913114/the-role-of-pharmacists-in-caring-for-young-people-with-chronic-illness
#10
Nicola J Gray, Karen L Shaw, Felicity J Smith, Jonathan Burton, Julie Prescott, Rachel Roberts, David Terry, Janet E McDonagh
PURPOSE: To explore the perceived and potential roles of pharmacists in the care of young people aged 10-24 years with chronic illness, through the exemplar of juvenile arthritis, from the perspectives of UK community and hospital pharmacists, health service commissioners, rheumatology health professionals, and lay advocates. METHODS: A sequential mixed methods study design comprises the following: focus groups with community and hospital pharmacists; telephone interviews with pharmacy and rheumatology stakeholders and commissioners; and multidisciplinary group discussions to prioritize roles generated by the first two qualitative phases...
November 29, 2016: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/27912209/databases-for-congenital-heart-defect-public-health-studies-across-the-lifespan
#11
REVIEW
Tiffany J Riehle-Colarusso, Lisa Bergersen, Craig S Broberg, Cynthia H Cassell, Darryl T Gray, Scott D Grosse, Jeffrey P Jacobs, Marshall L Jacobs, Russell S Kirby, Lazaros Kochilas, Asha Krishnaswamy, Arianne Marelli, Sara K Pasquali, Thalia Wood, Matthew E Oster
No abstract text is available yet for this article.
October 26, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27912025/population-dynamics-synchrony-and-environmental-quality-of-hokkaido-voles-lead-to-temporal-and-spatial-taylor-s-laws
#12
Joel E Cohen, Takashi Saitoh
Taylor's law (TL) asserts that the variance in a species' population density is a power-law function of its mean population density: log(variance) = a + b × log(mean). TL is widely verified. We show here that empirical time series of density of the Hokkaido gray-sided vole, Myodes rufocanus, sampled 1962-1992 at 85 locations, satisfied temporal and spatial forms of TL. The slopes (b ± standard error) of the temporal and spatial TL were estimated to be 1.613 ± 0.141 and 1.430 ± 0.132, respectively...
December 2016: Ecology
https://www.readbyqxmd.com/read/27911367/a-simple-fluorescence-assay-for-quantification-of-canine-neutrophil-extracellular-trap-release
#13
Unity Jeffery, Robert D Gray, Dana N LeVine
Neutrophil extracellular traps are networks of DNA, histones and neutrophil proteins released in response to infectious and inflammatory stimuli. Although a component of the innate immune response, NETs are implicated in a range of disease processes including autoimmunity and thrombosis. This protocol describes a simple method for canine neutrophil isolation and quantification of NETs using a microplate fluorescence assay. Blood is collected using conventional venipuncture techniques. Neutrophils are isolated using dextran sedimentation and a density gradient using conditions optimized for dog blood...
November 21, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27911306/cortical-thickness-and-microstructural-white-matter-changes-detect-amnestic-mild-cognitive-impairment
#14
Zan Wang, Zhengjia Dai, Hao Shu, Duan Liu, Qihao Guo, Yong He, Zhijun Zhang
Both the apolipoprotein E (APOE) ɛ4 allele and amnestic mild cognitive impairment (aMCI) are considered to be risk factors for Alzheimer's disease (AD). The primary aim of this study was to determine whether the aMCI-related abnormality in gray matter (GM) cortical thickness and white matter (WM) tracts integrity would be modified by the APOE genotype. A total of 146 older adults, including 64 aMCI patients (28 ɛ4 carriers and 36 non-carriers) and 82 healthy controls (39 ɛ4 carriers and 43 non-carriers), underwent a standardized clinical interview, neuropsychological battery assessment, and multi-modal brain magnetic resonance imaging scans...
November 29, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27911235/robustness-of-the-neurological-prognostic-score-in-brain-metastasis-patients-treated-with-gamma-knife-radiosurgery
#15
Toru Serizawa, Yoshinori Higuchi, Osamu Nagano, Shinji Matsuda, Kyoko Aoyagi, Junichi Ono, Naokatsu Saeki, Yasuo Iwadate, Tatsuo Hirai, Shinya Takemoto, Yuta Shibamoto
OBJECTIVE The neurological prognostic score (NPS) was recently proposed as a means for predicting neurological outcomes, such as the preservation of neurological function and the prevention of neurological death, in brain metastasis patients treated with Gamma Knife radiosurgery (GKRS). NPS consists of 2 groups: Group A patients were expected to have better neurological outcomes, and Group B patients were expected to have poorer outcomes. NPS robustness was tested in various situations. METHODS In total, 3040 patients with brain metastases that were treated with GKRS were analyzed...
December 2, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27910866/biomechanical-analysis-of-normal-brain-development-during-the-first-year-of-life-using-finite-strain-theory
#16
Jeong Chul Kim, Li Wang, Dinggang Shen, Weili Lin
The first year of life is the most critical time period for structural and functional development of the human brain. Combining longitudinal MR imaging and finite strain theory, this study aimed to provide new insights into normal brain development through a biomechanical framework. Thirty-three normal infants were longitudinally imaged using MRI from 2 weeks to 1 year of age. Voxel-wise Jacobian determinant was estimated to elucidate volumetric changes while Lagrange strains (both normal and shear strains) were measured to reveal directional growth information every 3 months during the first year of life...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910699/effect-on-measurement-accuracy-of-transillumination-using-sawtooth-shaped-function-optical-signal
#17
Xue Yang, Yajia Hu, Gang Li, Ling Lin
There exist lots of difficulties in optical transillumination of biological tissues, especially, low-level-light detection and low gray-scale resolution could reduce recognition accuracy of differences in tissue. Aiming at the problems, this paper proposes a method for optical transillumination using sawtooth-shaped-function optical signal and frame accumulation technology to explore the spatial information of heterogeneity in the tissue. Sawtooth-shaped-function optical signal combined with frame accumulation technology is applied to realize the low-level-light image detection, where frame accumulation technology improves the signal-to-noise ratio and detection sensitivity, and sawtooth-shaped-function signal improves gray-scale resolution...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910451/preliminary-design-of-a-tangentially-viewing-imaging-bolometer-for-nstx-u
#18
B J Peterson, R Sano, M L Reinke, J M Canik, L F Delgado-Aparicio, J D Lore, K Mukai, T K Gray, G G van Eden, M A Jaworski
The infrared imaging video bolometer (IRVB) measures plasma radiated power images using a thin metal foil. Two different designs with a tangential view of NSTX-U are made assuming a 640 × 480 (1280 × 1024) pixel, 30 (105) fps, 50 (20) mK, IR camera imaging the 9 cm × 9 cm × 2 μm Pt foil. The foil is divided into 40 × 40 (64 × 64) IRVB channels. This gives a spatial resolution of 3.4 (2.2) cm on the machine mid-plane. The noise equivalent power density of the IRVB is given as 113 (46) μW/cm(2) for a time resolution of 33 (20) ms...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910411/design-and-characterization-of-a-prototype-divertor-viewing-infrared-video-bolometer-for-nstx-u
#19
G G van Eden, M L Reinke, B J Peterson, T K Gray, L F Delgado-Aparicio, M A Jaworski, J Lore, K Mukai, R Sano, S N Pandya, T W Morgan
The InfraRed Video Bolometer (IRVB) is a powerful tool to measure radiated power in magnetically confined plasmas due to its ability to obtain 2D images of plasma emission using a technique that is compatible with the fusion nuclear environment. A prototype IRVB has been developed and installed on NSTX-U to view the lower divertor. The IRVB is a pinhole camera which images radiation from the plasma onto a 2.5 μm thick, 9 × 7 cm(2) Pt foil and monitors the resulting spatio-temporal temperature evolution using an IR camera...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910126/gradient-echo-epi-using-a-high-degree-shim-insert-coil-at-7%C3%A2-t-implications-for-bold-fmri
#20
Tae Kim, Yoojin Lee, Tiejun Zhao, Hoby P Hetherington, Jullie W Pan
PURPOSE: To quantitatively assess the effects of high degree and order (1(st) -4(th+) ) relative to 1(st) -2(nd) degree B0 shimming at 7 Tesla (T) on gradient-echo echo planar imaging (GE-EPI) and blood-oxygen-level dependent (BOLD) activation. METHODS: Simulations and GE-EPI were performed at (2mm)(3) and (3mm)(3) resolution, evaluating the temporal signal-to-noise ratio (tSNR), transverse relaxivity ( R2*), BOLD % signal change and activated pixel counts in a breath-hold task...
December 1, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
keyword
keyword
16811
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"