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https://www.readbyqxmd.com/read/28241674/-association-between-serum-magnesium-ion-level-and-risk-of-noise-induced-hearing-loss
#1
J Jiao, G Z Gu, G S Chen, Y X Zheng, H L Zhang, Q Geng, Y B Cheng, S F Yu
Objective: To investigate the association between serum magnesium ion level and risk of noise-induced hearing loss (NIHL) . Methods: Acohort study was performed for 7 445 workers exposed to noise in the steelmaking and steel rolling workshops of an iron and steel enterprise in Henan Province, China. The follow-up time was from January 1, 2006 to December 31, 2015. The workers with a binaural average high-frequency hearing threshold of ≥40 dB (HL) were enrolled as case group, and those with a binaural average high-frequency hearing threshold of <35 dB (HL) and a binaural average speech frequency of ≤25 dB (HL) were enrolled as control group...
December 20, 2016: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28241670/surface-response-of-brominated-carbon-media-on-laser-and-thermal-excitation-optical-and-thermal-analysis-study
#2
Volodymyr V Multian, Fillip E Kinzerskyi, Anna V Vakaliuk, Liudmyla M Grishchenko, Vitaliy E Diyuk, Olga Yu Boldyrieva, Vadim O Kozhanov, Oleksandr V Mischanchuk, Vladyslav V Lisnyak, Volodymyr Ya Gayvoronsky
The present study is objected to develop an analytical remote optical diagnostics of the functionalized carbons surface. Carbon composites with up to 1 mmol g(-1) of irreversibly adsorbed bromine were produced by the room temperature plasma treatment of an activated carbon fabric (ACF) derived from polyacrylonitrile textile. The brominated ACF (BrACF) was studied by elastic optical scattering indicatrix analysis at wavelength 532 nm. The obtained data were interpreted within results of the thermogravimetric analysis, X-ray photoelectron spectroscopy and temperature programmed desorption mass spectrometry...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28241601/slow-light-in-mass-produced-dispersion-engineered-photonic-crystal-ring-resonators
#3
Kathleen McGarvey-Lechable, Tabassom Hamidfar, David Patel, Luhua Xu, David V Plant, Pablo Bianucci
We present experimental results of photonic crystal ring resonators (PhCRRs) fabricated on the CMOS-compatible, silicon-on-insulator platform via 193-nm deep-UV lithography. Our dispersion-engineering design approach is compared to experimental results, showing very good agreement between theory and measurements. Specifically, we report a mean photonic band-edge wavelength of 1546.2 ± 5.8 nm, a 0.2% variation from our targeted band-edge wavelength of 1550 nm. Methods for the direct calculation of the experimental, discrete dispersion relation and extraction of intrinsic quality factors for a highly-dispersive resonator are discussed...
February 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28241530/intersubband-transition-in-lattice-matched-bgan-aln-quantum-well-structures-with-high-absorption-coefficients
#4
Seoung-Hwan Park, Doyeol Ahn, Chan-Yong Park
Intersubband absorption properties of lattice-matched BGaN/AlN quantum well (QW) structures grown on AlN substrate are theoretically investigated using an effective mass theory considering the nonparabolicity of the conduction band. These results are compared with those of GaN/AlN QW structures. The intersubband absorption coefficient of the BGaN/AlN QW structure is shown to be enhanced significantly, compared to that of the conventional GaN/AlN QW structure. This can be explained by the fact that the BGaN/AlN QW structure exhibits larger intersuband dipole moment and quasi-Fermi-level separation than the GaN/AlN QW structure, due to the increase in the carrier confinement by a larger internal field...
February 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28241506/influencing-factors-of-the-body-mass-index-of-elementary-students-in-southern-taiwan
#5
Li-Na Chou, Min-Li Chen
The body mass index (BMI) of school children in Taiwan is markedly increasing. According to statistical data from the Taiwan Ministry of Education, the prevalence of obesity in school children from the southern part of the country is the highest in Taiwan. Thus, exploring the factors influencing BMI in elementary school children from southern Taiwan is crucial. This study investigated the influencing factors including physical activity levels, sedentary behaviors, dietary habits, and perceived body shape on the BMIs of elementary school children from southern Taiwan...
February 23, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28241496/the-role-of-sarcosine-uracil-and-kynurenic-acid-metabolism-in-urine-for-diagnosis-and-progression-monitoring-of-prostate-cancer
#6
Georgios Gkotsos, Christina Virgiliou, Ioanna Lagoudaki, Chrysanthi Sardeli, Nikolaos Raikos, Georgios Theodoridis, Georgios Dimitriadis
The aim of this pilot study is to evaluate sarcosine, uracil, and kynurenic acid in urine as potential biomarkers in prostate cancer detection and progression monitoring. Sarcosine, uracil, and kynurenic acid were measured in urine samples of 32 prostate cancer patients prior to radical prostatectomy, 101 patients with increased prostate-specific antigen prior to ultrasonographically-guided prostatic biopsy collected before and after prostatic massage, and 15 healthy volunteers (controls). The results were related to histopathologic data, Gleason score, and PSA (Prostate Specific Antigen)...
February 23, 2017: Metabolites
https://www.readbyqxmd.com/read/28241482/chemical-characterization-of-enteromorpha-prolifera-extract-obtained-by-enzyme-assisted-extraction-and-its-influence-on-the-metabolic-activity-of-caco-2
#7
Izabela Michalak, Agnieszka Dmytryk, Agnieszka Śmieszek, Krzysztof Marycz
The green seaweed Enteromorpha prolifera was used as a feedstock for the production of enzymatic hydrolysate using cellulase. The selection of the conditions for enzymatic hydrolysis of the biomass was carried out for different enzyme doses and incubation periods. The obtained extract was examined in terms of its multielemental composition, content of polyphenols and antibacterial properties (tested against Escherichia coli and Staphylococcus aureus). Additionally, its influence on the metabolic activity of human colon epithelial cells (Caco-2) was analyzed...
February 23, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28241479/unmanned-aerial-vehicle-systems-for-remote-estimation-of-flooded-areas-based-on-complex-image-processing
#8
Dan Popescu, Loretta Ichim, Florin Stoican
Floods are natural disasters which cause the most economic damage at the global level. Therefore, flood monitoring and damage estimation are very important for the population, authorities and insurance companies. The paper proposes an original solution, based on a hybrid network and complex image processing, to this problem. As first novelty, a multilevel system, with two components, terrestrial and aerial, was proposed and designed by the authors as support for image acquisition from a delimited region. The terrestrial component contains a Ground Control Station, as a coordinator at distance, which communicates via the internet with more Ground Data Terminals, as a fixed nodes network for data acquisition and communication...
February 23, 2017: Sensors
https://www.readbyqxmd.com/read/28241477/impact-of-exercise-and-aging-on-rat-urine-and-blood-metabolome-an-lc-ms-based-metabolomics-longitudinal-study
#9
Olga Deda, Helen G Gika, Ioannis Taitzoglou, Νikolaos Raikos, Georgios Theodoridis
Aging is an inevitable condition leading to health deterioration and death. Regular physical exercise can moderate the metabolic phenotype changes of aging. However, only a small number of metabolomics-based studies provide data on the effect of exercise along with aging. Here, urine and whole blood samples from Wistar rats were analyzed in a longitudinal study to explore metabolic alterations due to exercise and aging. The study comprised three different programs of exercises, including a life-long protocol which started at the age of 5 months and ended at the age of 21 months...
February 23, 2017: Metabolites
https://www.readbyqxmd.com/read/28241462/the-relationship-between-maternal-plasma-leptin-and-adiponectin-concentrations-and-newborn-adiposity
#10
Natália P Castro, Verônica V Euclydes, Fernanda A Simões, Lourdes R A Vaz-de-Lima, Cyro A De Brito, Liania A Luzia, Delan Devakumar, Patrícia H C Rondó
Increased maternal blood concentrations of leptin and decreased adiponectin levels, which are common disturbances in obesity, may be involved in offspring adiposity by programming fetal adipose tissue development. The aim of this study was to assess the relationship between maternal leptin and adiponectin concentrations and newborn adiposity. This was a cross-sectional study involving 210 healthy mother-newborn pairs from a public maternity hospital in São Paulo, Brazil. Maternal blood samples were collected after delivery and leptin and adiponectin concentrations were measured by enzyme-linked immunosorbent assay...
February 23, 2017: Nutrients
https://www.readbyqxmd.com/read/28241457/mapping%C3%A2-post-transcriptional%C3%A2-modifications%C3%A2-onto%C3%A2-transfer%C3%A2-ribonucleic%C3%A2-acid%C3%A2-sequences%C3%A2-by%C3%A2-liquid%C3%A2-chromatography%C3%A2-tandem%C3%A2-mass%C3%A2-spectrometry
#11
REVIEW
Robert L Ross, Xiaoyu Cao, Patrick A Limbach
Liquid chromatography, coupled with tandem mass spectrometry, has become one of the most popular methods for the analysis of post-transcriptionally modified transfer ribonucleic acids (tRNAs). Given that the information collected using this platform is entirely determined by the mass of the analyte, it has proven to be the gold standard for accurately assigning nucleobases to the sequence. For the past few decades many labs have worked to improve the analysis, contiguous to instrumentation manufacturers developing faster and more sensitive instruments...
February 22, 2017: Biomolecules
https://www.readbyqxmd.com/read/28241456/evaluation-of-rice-resistance-to-southern-rice-black-streaked-dwarf-virus-and-rice-ragged-stunt-virus-through-combined-field-tests-quantitative-real-time-pcr-and-proteome-analysis
#12
Zhenchao Wang, Lu Yu, Linhong Jin, Wenli Wang, Qi Zhao, Longlu Ran, Xiangyang Li, Zhuo Chen, Rong Guo, Yongtian Wei, Zhongcheng Yang, Enlong Liu, Deyu Hu, Baoan Song
: Diseases caused by southern rice black-streaked dwarf virus (SRBSDV) and rice ragged stunt virus (RRSV) considerably decrease grain yield. Therefore, determining rice cultivars with high resistance to SRBSDV and RRSV is necessary. In this study, rice cultivars with high resistance to SRBSDV and RRSV were evaluated through field trials in Shidian and Mangshi county, Yunnan province, China. SYBR Green I-based quantitative real-time polymerase chain reaction (qRT-PCR) analysis was used to quantitatively detect virus gene expression levels in different rice varieties...
February 22, 2017: Viruses
https://www.readbyqxmd.com/read/28241432/mediterranean-diet-and-its-correlates-among-adolescents-in-non-mediterranean-european-countries-a-population-based-study
#13
Dario Novak, Lovro Štefan, Rebeka Prosoli, Arunas Emeljanovas, Brigita Mieziene, Ivana Milanović, Snežana Radisavljević-Janić
Little is known about the factors which might influence the adherence to a Mediterranean diet in non-Mediterranean European countries. Thus, the main purpose of this study was to determine the associations between socioeconomic, psychological, and physical factors on a Mediterranean diet. In this cross-sectional study, participants were 14-18-year-old adolescents (N = 3071) from two non-Mediterranean countries: Lithuania (N = 1863) and Serbia (N = 1208). The dependent variable was Mediterranean diet, and was assessed with the Mediterranean Diet Quality Index for children and adolescents questionnaire...
February 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28241423/metabolic-profiling-as-a-screening-tool-for-cytotoxic-compounds-identification-of-3-alkyl-pyridine-alkaloids-from-sponges-collected-at-a-shallow-water-hydrothermal-vent-site-north-of-iceland
#14
Eydis Einarsdottir, Manuela Magnusdottir, Giuseppe Astarita, Matthias Köck, Helga M Ögmundsdottir, Margret Thorsteinsdottir, Hans Tore Rapp, Sesselja Omarsdottir, Giuseppe Paglia
Twenty-eight sponge specimens were collected at a shallow water hydrothermal vent site north of Iceland. Extracts were prepared and tested in vitro for cytotoxic activity, and eight of them were shown to be cytotoxic. A mass spectrometry (MS)-based metabolomics approach was used to determine the chemical composition of the extracts. This analysis highlighted clear differences in the metabolomes of three sponge specimens, and all of them were identified as Haliclona (Rhizoniera) rosea (Bowerbank, 1866). Therefore, these specimens were selected for further investigation...
February 22, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28241421/age-related-loss-in-bone-mineral-density-of-rats-fed-lifelong-on-a-fish-oil-based-diet-is-avoided-by-coenzyme-q10-addition
#15
Alfonso Varela-López, Julio J Ochoa, José M Llamas-Elvira, Magdalena López-Frías, Elena Planells, MCarmen Ramirez-Tortosa, Cesar L Ramirez-Tortosa, Francesca Giampieri, Maurizio Battino, José L Quiles
During aging, bone mass declines increasing osteoporosis and fracture risks. Oxidative stress has been related to this bone loss, making dietary compounds with antioxidant properties a promising weapon. Male Wistar rats were maintained for 6 or 24 months on diets with fish oil as unique fat source, supplemented or not with coenzyme Q10 (CoQ10), to evaluate the potential of adding this molecule to the n-3 polyunsaturated fatty acid (n-3 PUFA)-based diet for bone mineral density (BMD) preservation. BMD was evaluated in the femur...
February 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28241420/antiosteoporotic-activity-of-genistein-aglycone-in-postmenopausal-women-evidence-from-a-post-hoc-analysis-of-a-multicenter-randomized-controlled-trial
#16
Vincenzo Arcoraci, Marco Atteritano, Francesco Squadrito, Rosario D'Anna, Herbert Marini, Domenico Santoro, Letteria Minutoli, Sonia Messina, Domenica Altavilla, Alessandra Bitto
Genistein has a preventive role against bone mass loss during menopause. However, experimental data in animal models of osteoporosis suggest an anti-osteoporotic potential for this isoflavone. We performed a post-hoc analysis of a previously published trial investigating the effects of genistein in postmenopausal women with low bone mineral density. The parent study was a randomized, double-blind, placebo-controlled trial involving postmenopausal women with a femoral neck (FN) density <0.795 g/cm². A cohort of the enrolled women was, in fact, identified at the baseline as osteoporotic (n = 121) on the basis of their T-score and analyzed thereafter for the 24 months' treatment with either 1000 mg of calcium and 800 IU vitamin D3 (placebo; n = 59); or calcium, vitamin D3, and Genistein aglycone (54 mg/day; genistein; n = 62)...
February 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28241412/removal-capacities-of-polycyclic-aromatic-hydrocarbons-pahs-by-a-newly-isolated-strain-from-oilfield-produced-water
#17
Yi-Bin Qi, Chen-Yu Wang, Cheng-Yuan Lv, Zeng-Min Lun, Cheng-Gang Zheng
The polycyclic aromatic hydrocarbon (PAH)-degrading strain Q8 was isolated from oilfield produced water. According to the analysis of a biochemical test, 16S rRNA gene, house-keeping genes and DNA-DNA hybridization, strain Q8 was assigned to a novel species of the genus Gordonia. The strain could not only grow in mineral salt medium (MM) and utilize naphthalene and pyrene as its sole carbon source, but also degraded mixed naphthalene, phenanthrene, anthracene and pyrene. The degradation ratio of these four PAHs reached 100%, 95...
February 22, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28241374/linking-above-and-belowground-traits-to-soil-and-climate-variables-an-integrated-database-on-china-s-grassland-species
#18
Yan Geng, Wenhong Ma, Liang Wang, Frank Baumann, Peter Kühn, Thomas Scholten, Jin-Sheng He
Knowledge of plant functional traits and trait-environment interactions is important for characterizing species strategies and understanding ecological processes. However, comprehensive field data on both above- and belowground traits, together with their environmental variables are scarce. Biome-scale studies are particularly lacking. Here we present two large-scale datasets that include functional traits of leaves and fine roots and their corresponding soil and climatic variables in China's grasslands. Leaf, fine root and soil samples were collected in three biogeographic regions: temperate grassland on the Inner Mongolia Plateau, alpine grassland on the Tibetan Plateau, and mountain grassland in the Xinjiang mountain areas...
February 27, 2017: Ecology
https://www.readbyqxmd.com/read/28241237/association-of-testosterone-levels-with-anemia-in-older-men-a-controlled-clinical-trial
#19
Cindy N Roy, Peter J Snyder, Alisa J Stephens-Shields, Andrew S Artz, Shalender Bhasin, Harvey J Cohen, John T Farrar, Thomas M Gill, Bret Zeldow, David Cella, Elizabeth Barrett-Connor, Jane A Cauley, Jill P Crandall, Glenn R Cunningham, Kristine E Ensrud, Cora E Lewis, Alvin M Matsumoto, Mark E Molitch, Marco Pahor, Ronald S Swerdloff, Denise Cifelli, Xiaoling Hou, Susan M Resnick, Jeremy D Walston, Stephen Anton, Shehzad Basaria, Susan J Diem, Christina Wang, Stanley L Schrier, Susan S Ellenberg
Importance: In one-third of older men with anemia, no recognized cause can be found. Objective: To determine if testosterone treatment of men 65 years or older with unequivocally low testosterone levels and unexplained anemia would increase their hemoglobin concentration. Design, Setting, and Participants: A double-blinded, placebo-controlled trial with treatment allocation by minimization using 788 men 65 years or older who have average testosterone levels of less than 275 ng/dL...
February 21, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28241231/effect-of-testosterone-treatment-on-volumetric-bone-density-and-strength-in-older-men-with-low-testosterone-a-controlled-clinical-trial
#20
Peter J Snyder, David L Kopperdahl, Alisa J Stephens-Shields, Susan S Ellenberg, Jane A Cauley, Kristine E Ensrud, Cora E Lewis, Elizabeth Barrett-Connor, Ann V Schwartz, David C Lee, Shalender Bhasin, Glenn R Cunningham, Thomas M Gill, Alvin M Matsumoto, Ronald S Swerdloff, Shehzad Basaria, Susan J Diem, Christina Wang, Xiaoling Hou, Denise Cifelli, Darlene Dougar, Bret Zeldow, Douglas C Bauer, Tony M Keaveny
Importance: As men age, they experience decreased serum testosterone concentrations, decreased bone mineral density (BMD), and increased risk of fracture. Objective: To determine whether testosterone treatment of older men with low testosterone increases volumetric BMD (vBMD) and estimated bone strength. Design, Setting, and Participants: Placebo-controlled, double-blind trial with treatment allocation by minimization at 9 US academic medical centers of men 65 years or older with 2 testosterone concentrations averaging less than 275 ng/L participating in the Testosterone Trials from December 2011 to June 2014...
February 21, 2017: JAMA Internal Medicine
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