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https://www.readbyqxmd.com/read/28822932/hydrochemistry-of-waters-in-snowpacks-lakes-and-streams-of-mt-dagu-eastern-of-tibet-plateau
#1
Guang Zhao, Wei Li, Feng Li, Fu Zhang, Gangcai Liu
There is little available information on hydrochemistry of waters from glacial source to downstream of glacierized catchments. Here we examine the water chemistry of the snowpacks, lakes and streams at eight sampling sites within glacial basin in Mt. Dagu, east Tibetan Plateau. An air mass trajectory model, correlation analysis, Gibbs model, Piper diagram and hydrograph separation analysis were utilized to investigate the characteristics and solutes sources of these waters. Generally, the TDS (Total dissolved solids; 7...
August 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28822773/methodology-design-of-the-regional-sub-saharan-africa-total-diet-study-in-benin-cameroon-mali-and-nigeria
#2
Luc Ingenbleek, Eric Jazet, Anaclet D Dzossa, Samson B Adebayo, Julius Ogungbangbe, Sylvestre Dansou, Zima J Diallo, Christiant Kouebou, Abimbola Adegboye, Epiphane Hossou, Salimata Coulibaly, Sara Eyangoh, Bruno Le Bizec, Philippe Verger, Jean Kamanzi, Caroline Merten, Jean-Charles Leblanc
The core food model was described more than three decades ago, and has been used ever since to identify main food contributors to dietary intakes for both nutrients and other food chemicals. The Sub-Saharan Africa Total Diet Study (SSA-TDS) uses this model to describe the food consumption habits of some selected populations of Benin, Cameroon, Mali, and Nigeria, prior to use in the completion of quantitative risk assessments with regard to food chemicals. Food consumption data were derived from food expenditure data contained in national household budget surveys that were provided by the national institutes of statistics in each country...
August 16, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28821179/pungency-evaluation-of-hydroxyl-sanshool-compounds-after-dissolution-in-taste-carriers-per-time-related-characteristics
#3
Lulu Zhang, Bolin Shi, Houyin Wang, Lei Zhao, Zhongxiu Chen
This study was conducted to investigate the sensory characteristics and temporal migration of hydroxyl-sanshool compounds at slight and moderate concentrations after dissolution in ethanol-water, saccharose, NaCl, and MSG via 2-AFC, time intensity (TI) and temporal dominance of sensations (TDS) methods. The pungency detection threshold (DT) was suppressed in saccharose while NaCl and MSG solutions showed no effect on pungency DT. The area under the curve (AUC) of pungency increased in NaCl and MSG solutions and decreased significantly in saccharose solution...
September 1, 2017: Chemical Senses
https://www.readbyqxmd.com/read/28809793/the-degree-of-temporal-synchronization-of-the-pulse-oscillations-from-a-gain-switched-multimode-semiconductor-laser
#4
Kenji Wada, Naoaki Kitagawa, Tetsuya Matsuyama
Langevin noise leads to inhibition of the temporal synchronization of the pulse oscillations from a gain-switched multimode semiconductor laser, resulting in the power reduction in optical beat detection. In this paper, the degree of the temporal synchronization of the pulse oscillations was examined by numerically estimating the output energy in THz time-domain spectroscopy (THz-TDS) using multimode semiconductor laser rate equations that include Langevin noise. The degree was estimated to be 95.5% from the ratio of the averaged THz-TDS output energy for the case where Langevin noise was included to that for when Langevin noise was excluded...
August 15, 2017: Materials
https://www.readbyqxmd.com/read/28796325/temporal-texture-profile-and-identification-of-glass-transition-temperature-as-an-instrumental-predictor-of-stickiness-in-a-caramel-system
#5
Emily J Mayhew, Shelly J Schmidt, Pascal Schlich, Soo-Yeun Lee
Stickiness is an important texture attribute in many food systems, but its meaning can vary by person, product, and throughout mastication. This variability and complexity makes it difficult to devise analytical tests that accurately and consistently predict sensory stickiness. Glass transition temperature (Tg ) is a promising candidate for texture prediction. Our objective is to elucidate the temporal profile of stickiness in order to probe the relationship between Tg and dynamic stickiness perception. Nine caramel samples with diverse texture and thermal profiles were produced for sensory testing and differential scanning calorimetry...
August 10, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28793843/assessment-of-phyto-kinetic-removal-of-pollutants-of-paper-mill-effluent-using-water-hyacinth-eichhornia-crassipes-mart-solms
#6
Vinod Kumar, Jogendra Singh, A K Chopra
Laboratory experiments were carried out to assess the phytoremediation potential of water hyacinth (Eichhornia crassipes [Mart.] Solms) for the removal of different parameters of the paper mill effluent. The maximum removal efficiency of E. crassipes and phyto-kinetic removal rate was recorded at 50% concentration of the paper mill effluent followed by 60 days of phytoremediation experiments. The most percent reduction was observed in the contents of EC (62.23%), TDS (72.54%), BOD (79.93%), COD (85.66%), TKN (89...
August 9, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28783011/removal-optimization-of-heavy-metals-from-effluent-of-sludge-dewatering-process-in-oil-and-gas-well-drilling-by-nanofiltration
#7
Mostafa Hedayatipour, Neemat Jaafarzadeh, Mehdi Ahmadmoazzam
Oil and gas well drilling industries discharge large volumes of contaminated wastewater produced during oil and gas exploration process. In this study, the effect of different operational variables, including temperature, pH and transmembrane pressure on process performance of a commercially available nanofiltration membrane (JCM-1812-50N, USA) for removing Ba, Ni, Cr, NaCl and TDS from produced wastewater by dewatering unit of an oil and gas well drilling industry was evaluated. In optimum experimental conditions (T = 25 °C, P = 170 psi and pH = 4) resulted from Thaguchi method, 85...
August 3, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28773079/effect-of-nanosized-nbc-precipitates-on-hydrogen-diffusion-in-x80-pipeline-steel
#8
Qiaoqi Cui, Junsheng Wu, Donghan Xie, Xiaoguang Wu, Yunhua Huang, Xiaogang Li
In this paper, the effects of dispersed 3~10 nm NbC precipitates on hydrogen diffusion in X80 pipeline steel were investigated by means of high resolution transmission electron microscopy (HRTEM), electrochemical hydrogen permeation, and thermal desorption spectroscopy (TDS). The relationship between hydrogen diffusion and temperature was determined for Nb-free X80 and 0.055 wt% Nb X80 steel. The temperature dividing reversible and irreversible traps was measured, and the quantity of hydrogen captured by different traps was calculated...
June 28, 2017: Materials
https://www.readbyqxmd.com/read/28772961/reduction-of-defects-in-algan-grown-on-nanoscale-patterned-sapphire-substrates-by-hydride-vapor-phase-epitaxy
#9
Chi-Tsung Tasi, Wei-Kai Wang, Tsung-Yen Tsai, Shih-Yung Huang, Ray-Hua Horng, Dong-Sing Wuu
In this study, a 3-μm-thick AlGaN film with an Al mole fraction of 10% was grown on a nanoscale-patterned sapphire substrate (NPSS) using hydride vapor phase epitaxy (HVPE). The growth mechanism, crystallization, and surface morphology of the epilayers were examined using X-ray diffraction, transmission electron microscopy (TEM), and scanning electron microscopy at various times in the growth process. The screw threading dislocation (TD) density of AlGaN-on-NPSS can improve to 1-2 × 10⁸ cm(-2), which is significantly lower than that of the sample grown on a conventional planar sapphire substrate (7 × 10⁸ cm(-2))...
May 31, 2017: Materials
https://www.readbyqxmd.com/read/28767723/improving-rice-population-productivity-by-reducing-nitrogen-rate-and-increasing-plant-density
#10
Guangli Tian, Limin Gao, Yali Kong, Xiangyu Hu, Kailiu Xie, Ruiqing Zhang, Ning Ling, Qirong Shen, Shiwei Guo
In terms of tillering potential, the aboveground portions of rice are significantly influenced by the nitrogen level (NL) and transplant density (TD). To obtain a suitable combination of NL and TD, five NLs (0, 90, 180, 270 and 360 kg ha-1) and two TDs [high density (HD), 32.5×104 hills ha-1; low density (LD), 25.5×104 hills ha-1] were used in the rice experiments during 2012 to 2014, in Jiangsu, China. The results showed the highest grain yield of rice obtained at HD and LD when N supply was 180 and 270 kg ha-1, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28755451/comparative-effectiveness-of-antihypertensive-drugs-in-nondiabetic-patients-with-hypertension-a-population-based-study
#11
Marina Amaral de Ávila Machado, Cristiano Soares de Moura, Yishu Wang, Coraline Danieli, Michal Abrahamowicz, Sasha Bernatsky, Hassan Behlouli, Louise Pilote
The authors compared the effectiveness of thiazide diuretic (TD), angiotensin-converting enzyme inhibitor (ACEI), angiotensin receptor blocker (ARB), and calcium channel blocker (CCB) monotherapies for the treatment of nondiabetic hypertension using MarketScan Databases 2010-2014. Multivariable Cox regression models assessed whether the addition of a new antihypertensive drug, treatment discontinuation, or switch and major cardiovascular or cerebrovascular events varied across groups. A total of 565 009 patients started monotherapy with ACEIs (43...
July 29, 2017: Journal of Clinical Hypertension
https://www.readbyqxmd.com/read/28755336/enhanced-indirect-somatic-embryogenesis-of-date-palm-using-low-levels-of-seawater
#12
Rania A Taha
Date palm tolerates salinity, drought, and high temperatures. Arid and semiarid zones, especially the Middle East region, need a huge number of date palms for cultivation. To meet this demand, tissue culture techniques have great potential for mass production of plantlets, especially using the indirect embryogenesis technique; any improvement of these techniques is a worthy objective. Low levels of salinity can enhance growth and development of tolerant plants. A low level of seawater, a natural source of salinity, reduces the time required for micropropagation processes of date palm cv...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28744685/hydrochemical-evaluation-and-identification-of-geochemical-processes-in-the-shallow-and-deep-wells-in-the-ramganga-sub-basin-india
#13
Natarajan Rajmohan, Neelam Patel, Gaurav Singh, Upali A Amarasinghe
Groundwater samples were collected from 44 wells in the Ramganga Sub-Basin (RSB), India, and analysed for major ions, nutrients and trace metals. The primary goal of this study is to evaluate the hydrochemistry and to identify the geochemical processes that govern the water chemistry in the shallow and deep tube wells in the study area using geochemical methods. The knowledge of changes in hydrochemistry of the aquifers is important for both groundwater recharge and use in the region. This study found that there are substantial differences of water chemistry between shallow and deep wells...
July 26, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28737443/fertirrigation-with-sugarcane-vinasse-foreseeing-potential-impacts-on-soil-and-water-resources-through-vinasse-characterization
#14
Lucas T Fuess, Isabella J Rodrigues, Marcelo L Garcia
This paper reports the characterization of the polluting potential of sugarcane vinasse, the main wastewater from ethanol production. Compositional data from vinasse samples collected from sugarcane biorefineries were used to predict negative effects on the soil, water resources and crops potentially associated with fertirrigation, the primary final destination of vinasse in Brazil. High risks of soil salinization were associated with the land disposal of vinasse, as evidenced by the high levels of total dissolved solids (TDS; >4,000 mg L(-1)) and electrical conductivity (>6...
July 24, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28736617/an-investigation-of-desalination-by-nanofiltration-reverse-osmosis-and-integrated-hybrid-nf-ro-membranes-employed-in-brackish-water-treatment
#15
M Talaeipour, J Nouri, A H Hassani, A H Mahvi
BACKGROUND: As an appropriate tool, membrane process is used for desalination of brackish water, in the production of drinking water. The present study aims to investigate desalination processes of brackish water of Qom Province in Iran. METHODS: This study was carried out at the central laboratory of Water and Wastewater Company of the studied area. To this aim, membrane processes, including nanofiltration (NF) and reverse osmosis (RO), separately and also their hybrid process were applied...
2017: Journal of Environmental Health Science & Engineering
https://www.readbyqxmd.com/read/28733786/developing-an-environmental-water-quality-monitoring-program-for-haraz-river-in-northern-iran
#16
Mitra Tavakol, Reza Arjmandi, Mansoureh Shayeghi, Seyed Masoud Monavari, Abdolreza Karbassi
Water quality management plans are an indispensable strategy for conservation and utilization of water resources in a sustainable manner. One common industrial use of water is aquaculture. The present study is an attempt to use statistical analyses in order to prepare an environmental water quality monitoring program for Haraz River, in Northern Iran. For this purpose, the analysis of a total number of 18 physicochemical parameters was performed at 15 stations during a 1-year sampling period. According to the results of the multivariate statistical methods, the optimal monitoring would be possible by only 3 stations and 12 parameters, including NH3, EC, BOD, TSS, DO, PO4, NO3, TDS, temperature, turbidity, coliform, and discharge...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28730358/hydrogeochemical-characterization-and-groundwater-quality-assessment-in-intruded-coastal-brine-aquifers-laizhou-bay-china
#17
Xiaoying Zhang, Jinjie Miao, Bill X Hu, Hongwei Liu, Hanxiong Zhang, Zhen Ma
The aquifer in the coastal area of the Laizhou Bay is affected by salinization processes related to intense groundwater exploitation for brine resource and for agriculture irrigation during the last three decades. As a result, the dynamic balances among freshwater, brine, and seawater have been disturbed and the quality of groundwater has deteriorated. To fully understand the groundwater chemical distribution and evolution in the regional aquifers, hydrogeochemical and isotopic studies have been conducted based on the water samples from 102 observation wells...
July 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28730328/comparative-study-of-the-efficacy-of-transdermal-buprenorphine-patches-and-prolonged-release-tramadol-tablets-for-postoperative-pain-control-after-spinal-fusion-surgery-a-prospective-randomized-controlled-non-inferiority-trial
#18
Ho-Joong Kim, Hyo Sae Ahn, Yunjin Nam, Bong-Soon Chang, Choon-Ki Lee, Jin S Yeom
PURPOSE: To compare the efficacy of a transdermal buprenorphine patch (5, 10, 15, and 20 μg/h) with that of oral tramadol (150, 200, 250, and 300 mg) for postoperative pain control after single level spinal fusion surgery. METHODS: The present study (ClinicalTrials.gov, number NCT02416804) was a prospective, randomized controlled non-inferiority trial designed to determine the efficacy of buprenorphine TDS for alleviating postoperative pain following patient controlled analgesia (PCA) in persons underwent a single level posterior lumbar interbody fusion surgery through 1:1 allocation...
July 20, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28728163/nuclear-expression-of-gli-1-is-predictive-of-pathologic-complete-response-to-chemoradiation-in-trimodality-treated-oesophageal-cancer-patients
#19
Roopma Wadhwa, Xuemei Wang, Veerabhadran Baladandayuthapani, Bin Liu, Hironori Shiozaki, Yusuke Shimodaira, Quan Lin, Elena Elimova, Wayne L Hofstetter, Stephen G Swisher, David C Rice, Dipen M Maru, Neda Kalhor, Manoop S Bhutani, Brian Weston, Jeffrey H Lee, Heath D Skinner, Ailing W Scott, Dilsa Mizrak Kaya, Kazuto Harada, Donald Berry, Shumei Song, Jaffer A Ajani
BACKGROUND: Predictive biomarkers or signature(s) for oesophageal cancer (OC) patients undergoing preoperative therapy could help administration of effective therapy, avoidance of ineffective ones, and establishment new strategies. Since the hedgehog pathway is often upregulated in OC, we examined its transcriptional factor, Gli-1, which confers therapy resistance, we wanted to assess Gli-1 as a predictive biomarker for chemoradiation response and validate it. METHODS: Untreated OC tissues from patients who underwent chemoradiation and surgery were assessed for nuclear Gli-1 by immunohistochemistry and labelling indices (LIs) were correlated with pathologic complete response (pathCR) or <pathCR (resistance) and validated in a unique cohort...
July 20, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28724367/prognostic-significance-of-perigastric-tumor-deposits-in-patients-with-primary-gastric-cancer
#20
Shrestha Anup, Jun Lu, Chao-Hui Zheng, Ping Li, Jian-Wei Xie, Jia-Bin Wang, Jian-Xian Lin, Qi-Yue Chen, Long-Long Cao, Mi Lin, Qian Yu, Ying-Hong Yang, Chang-Ming Huang
BACKGROUND: The presence and the prognostic significance of perigastric tumor deposits (TDs) in primary gastric cancer have not been extensively studied. The aim of this study was to evaluate the prognostic significance perigastric TDs in primary gastric cancer. METHODS: From 2005 to 2010, 1250 patients underwent R0 gastrectomy at the Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, China. Out of 1250 patients, 132 patients with perigastric TDs were identified...
July 19, 2017: BMC Surgery
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