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https://www.readbyqxmd.com/read/27910522/design-and-characterization-of-a-linear-hencken-type-burner
#1
M F Campbell, G A Bohlin, P E Schrader, R P Bambha, C J Kliewer, K O Johansson, H A Michelsen
We have designed and constructed a Hencken-type burner that produces a 38-mm-long linear laminar partially premixed co-flow diffusion flame. This burner was designed to produce a linear flame for studies of soot chemistry, combining the benefit of the conventional Hencken burner's laminar flames with the advantage of the slot burner's geometry for optical measurements requiring a long interaction distance. It is suitable for measurements using optical imaging diagnostics, line-of-sight optical techniques, or off-axis optical-scattering methods requiring either a long or short path length through the flame...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27908401/the-variation-of-macro-and-micro-minerals-of-tissues-in-diabetic-and-non-diabetic-rats
#2
Tennille D Presley, A'ja V Duncan, Anne B Jeffers, Sayo O Fakayode
This study determined the levels of Ca, Mg, Fe, Zn, Cu, and Na in various tissues samples (liver, brain, kidney, intestines, muscle and hair) of diabetic and non-diabetic rats by flame atomic absorption spectroscopy, in order to assess the role of element levels during T2DM. The ratios of Ca/Mg, Zn/Cu, Ca/Zn, and Mg/Zn in diabetic and non-diabetic rat tissues were also calculated. The determined element levels were further subjected to a student-t test statistical analysis and multiple-linear-regression in order to evaluate similarities, differences, and an inter-element association in tissues of diabetic and non-diabetic rats...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908400/low-hepatic-copper-content-and-pnpla3-polymorphism-in-non-alcoholic-fatty-liver-disease-in-patients-without-metabolic-syndrome
#3
Albert Friedrich Stättermayer, Stefan Traussnigg, Elmar Aigner, Christian Kienbacher, Ursula Huber-Schönauer, Petra Steindl-Munda, Andreas Stadlmayr, Friedrich Wrba, Michael Trauner, Christian Datz, Peter Ferenci
INTRODUCTION: The pathogenesis of non-alcoholic fatty liver disease (NAFLD) is multifactorial including metabolic, genetic (e.g. PNPLA3 [patatin-like phospholipase domain-containing 3 gene]), viral factors and drugs. Besides, there is evidence for a role of copper deficiency. Aim of the study was to evaluate the role of hepatic copper content, PNPLA3 in NAFLD patients with and without metabolic syndrome (MetS). METHODS: One-hundred seventy-four NAFLD patients, who underwent liver biopsy for diagnostic work-up, were studied...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27905993/pregnant-women-s-perceptions-of-exposure-to-brominated-flame-retardants
#4
A Lane, C G Goodyer, F Rab, J M Ashley, S Sharma, A Hodgson, J Nisker
BACKGROUND: Recent media reports on human studies associating brominated flame retardants (BFRs) in household products in pregnancy with urogenital anomalies in boys and endocrine disruption in both sexes. We sought to explore the perceptions of pregnant women of brominated flame retardant (BFR) exposure, in light of recent media reports on the adverse health effects of BFR exposure prenatally. METHODS: Pregnant women were recruited for interviews through posters and pamphlets in prenatal clinics, prenatal fairs and community centres...
December 1, 2016: Reproductive Health
https://www.readbyqxmd.com/read/27901145/development-of-a-novel-carbon-coating-strategy-for-producing-core-shell-structured-carbon-coated-lifepo4-for-an-improved-li-ion-battery-performance
#5
Parakandy Muzhikara Pratheeksha, Erabhoina Hari Mohan, Bulusu Venkata Sarada, Mantripragada Ramakrishna, Kalyan Hembram, Pulakhandam Veera Venkata Srinivas, Paul Joseph Daniel, Tata Narasinga Rao, Srinivasan Anandan
In the present study, LiFePO4 (LFP) has been synthesized using a flame spray pyrolysis unit followed by carbon coating on LFP using a novel strategy of dehydration assisted polymerization process (DAP) in order to improve its electronic conductivity. Characterization studies revealed the presence of a pure LFP structure and the formation of a thin, uniform and graphitic carbon layer with a thickness of 6-8 nm on the surface of the LFP. A carbon coated LFP with 3 wt% of carbon, using a DAP process, delivered a specific capacity of 167 mA h g(-1) at a 0...
November 30, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27898310/potential-human-exposure-to-halogenated-flame-retardants-in-elevated-surface-dust-and-floor-dust-in-an-academic-environment
#6
Jaime M Allgood, Tamara Jimah, Carolyn M McClaskey, Mark J La Guardia, Stephanie C Hammel, Maryam M Zeineddine, Ian W Tang, Miryha G Runnerstrom, Oladele A Ogunseitan
Most households and workplaces all over the world possess furnishings and electronics, all of which contain potentially toxic flame retardant chemicals to prevent fire hazards. Indoor dust is a recognized repository of these types of chemicals including polybrominated diphenyl ethers (PBDEs) and non-polybrominated diphenyl ethers (non-PBDEs). However, no previous U.S. studies have differentiated concentrations from elevated surface dust (ESD) and floor dust (FD) within and across microenvironments. We address this information gap by measuring twenty-two flame-retardant chemicals in dust on elevated surfaces (ESD; n=10) and floors (FD; n=10) from rooms on a California campus that contain various concentrations of electronic products...
November 26, 2016: Environmental Research
https://www.readbyqxmd.com/read/27898309/diverging-temporal-trends-of-human-exposure-to-bisphenols-and-plastizisers-such-as-phthalates-caused-by-substitution-of-legacy-edcs
#7
Irina Gyllenhammar, Anders Glynn, Bo A G Jönsson, Christian H Lindh, Per Ola Darnerud, Kettil Svensson, Sanna Lignell
Phthalates and phenolic substances were investigated in urine samples from first-time mothers in Uppsala, Sweden, collected between 2009 and 2014. These substances have a comparably fast metabolism and urinary metabolites are predominantly analysed. The main aim was to investigate if measures to decrease production and use of certain phthalates and bisphenol A (BPA) have resulted in decreased human exposure, and to determine if exposures to replacement chemicals have increased. Temporal trends were evaluated for metabolites (n=13) of seven phthalates, a phthalate replacer, four different bisphenols, triclosan, one organophosphate-based flame retardant, and for two pesticides...
November 26, 2016: Environmental Research
https://www.readbyqxmd.com/read/27893579/the-psychological-impact-of-first-burn-camp-in-nicaragua
#8
Lisa L Tropez-Arceneaux, Arlen Tatiana Castillo Alaniz, Ivette Lucia Icaza, Eevelyn Alejandra Murillo
Asociacion Pro-Ninos Quemados de Nicaragua (APROQUEN) is a comprehensive burn center that provides a holistic and integrated approach to treating burns. APROQUEN has set the standards internationally with acute treatment for burns, intensive care, reconstructive surgeries, nutritional care, rehabilitation, occupational therapy, and psychological treatment. APROQUEN is excelling within Central and South America with life-saving techniques and quality of care. It is imperative that burn centers in Central America recognize that the treatment of a child with a burn injury surpasses physical care to include psychological treatment for the complete well-being of the child...
November 11, 2016: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/27890938/chemical-kinetic-model-uncertainty-minimization-through-laminar-flame-speed-measurements
#9
Okjoo Park, Peter S Veloo, David A Sheen, Yujie Tao, Fokion N Egolfopoulos, Hai Wang
Laminar flame speed measurements were carried for mixture of air with eight C3-4 hydrocarbons (propene, propane, 1,3-butadiene, 1-butene, 2-butene, iso-butene, n-butane, and iso-butane) at the room temperature and ambient pressure. Along with C1-2 hydrocarbon data reported in a recent study, the entire dataset was used to demonstrate how laminar flame speed data can be utilized to explore and minimize the uncertainties in a reaction model for foundation fuels. The USC Mech II kinetic model was chosen as a case study...
October 2016: Combustion and Flame
https://www.readbyqxmd.com/read/27885820/coupling-of-homogeneous-liquid-liquid-extraction-and-dispersive-liquid-liquid-microextraction-for-the-extraction-and-preconcentration-of-polycyclic-aromatic-hydrocarbons-from-aqueous-samples-followed-by-gc-with-flame-ionization-detection
#10
Mir Ali Farajzadeh, Elahe Behboudi Khiavi, Parisa Khorram, Mohammad Reza Afshar Mogaddam
In the present study a simple and rapid method for the extraction and preconcentration of some polycyclic aromatic hydrocarbons in water samples has been developed. In this method two sample preparation methods were combined to obtain high extraction recoveries and enrichment factors for sensitive analysis of the selected analytes. In the first stage of the method, a homogeneous solution containing an aqueous solution and cyclohexyl amine is broken by addition of a salt. After centrifugation, the upper collected phase containing the extracted analytes is subjected to the following dispersive liquid-liquid microextraction method...
November 25, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27884470/the-first-exposure-assessment-of-legacy-and-unrestricted-brominated-flame-retardants-in-predatory-birds-of-pakistan
#11
Naeem Akhtar Abbasi, Igor Eulaers, Veerle Leontina Bernard Jaspers, Muhammad Jamshed Iqbal Chaudhry, Adrien Frantz, Per Lennart Ambus, Adrian Covaci, Riffat Naseem Malik
The exposure to legacy polybrominated diphenyl ethers (PBDEs), hexabromocyclododecanes (HBCDDs) and unrestricted 1,2-bis (2,4,6-tribromophenoxy) ethane (BTBPE), bis (2-ethylhexyl)-2,3,4,5-tetrabromophthalate (BEH-TEBP) and 2-ethylhexyl-2,3,4,5-tetrabromo-benzoate (EH-TBB) was examined in tail feathers of 76 birds belonging to ten predatory species inhabiting Pakistan. In addition, different feather types of six individuals of Black kite (Milvus migrans) were compared for their brominated flame retardant (BFR) levels...
November 21, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27876543/in-utero-and-childhood-ddt-dde-pbde-and-pcbs-exposure-and-sex-hormones-in-adolescent-boys-the-chamacos-study
#12
Brenda Eskenazi, Stephen A Rauch, Rachel Tenerelli, Karen Huen, Nina T Holland, Robert H Lustig, Katherine Kogut, Asa Bradman, Andreas Sjodin, Kim G Harley
Dichlorodiphenyltrichloroethane (DDT), polybrominated diphenyl ether (PBDE) flame retardants, and polychlorinated biphenyls (PCBs) are believed to be endocrine-disrupting chemicals (EDCs) in humans and animals. The purpose of this study is to examine the relationship of in utero and childhood exposure to these purported EDCs and reproductive hormones in adolescent boys who participated in CHAMACOS, an ongoing birth cohort in California's Salinas Valley. We measured o,p'- and p,p'-DDT, p,p'- DDE, PBDEs and PCBs in serum collected from mothers during pregnancy or at delivery and from their sons at 9 years...
November 14, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/27871077/impact-of-annexin-a-7-deficiency-on-fgf23-plasma-concentrations
#13
Anja T Umbach, Omar El-Attar, Dong Luo, Hajar Fakhri, Rosi Bissinger, Florian Lang
BACKGROUND/AIMS: The release of fibroblast growth factor FGF23, a powerful regulator of 1,25(OH)2D3 formation and mineral metabolism, is stimulated by store-operated Ca2+ entry (SOCE), which is accomplished by the pore forming Ca2+ release activated channel protein Orai1. Regulators of Orai1 and thus FGF23 release include serum & glucocorticoid inducible kinase SGK1, a kinase up-regulated by glucocorticosteroids. Some effects of glucocorticoids require the presence of annexin A7, such as suppression of prostaglandin E2 in gastric glands...
November 21, 2016: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/27868274/apci-as-an-innovative-ionization-mode-compared-to-ei-and-ci-for-the-analysis-of-a-large-range-of-organophosphate-esters-using-gc-ms-ms
#14
Wafaa Halloum, Ronan Cariou, Gaud Dervilly-Pinel, Farouk Jaber, Bruno Le Bizec
Organophosphate esters (OPEs) are chemical compounds incorporated into materials as flame-proof and/or plasticizing agents. In this work, 13 non-halogenated and 5 halogenated OPEs were studied. Their mass spectra were interpreted and compared in terms of fragmentation patterns and dominant ions via various ionization techniques (electron ionization (EI) and chemical ionization (CI) under vacuum and corona discharge atmospheric pressure chemical ionization (APCI)) on gas chromatography coupled to mass spectrometry (GC-MS)...
November 21, 2016: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/27864595/accelerated-solvent-extraction-combined-with-solid-phase-extraction-for-the-determination-of-organophosphate-esters-from-sewage-sludge-compost-by-uhplc-ms-ms
#15
Long Pang, Peijie Yang, Liming Ge, Jingjing Du, Hongzhong Zhang
Organophosphate esters (OPEs), widely used as flame retardants and plasticizers, are regarded as emerging pollutants. OPEs are prone to concentrate into residual activated sludge, which might cause secondary pollution if not suitably treated. Composting is an economical and effective approach to make sewage sludge stable and harmless. Therefore, it is essential to develop a novel method for analyzing OPEs in sewage sludge compost samples. However, in the composting process, large amounts of amendments are doped into the sludge to adjust the carbon-nitrogen ratio...
November 18, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27864444/simultaneous-burst-imaging-of-dual-species-using-planar-laser-induced-fluorescence-at-50%C3%A2-khz-in-turbulent-premixed-flames
#16
Zheming Li, Joakim Rosell, Marcus Aldén, Mattias Richter
Spatially and temporally resolved measurements are of great importance in turbulent premixed flame studies, especially when investigating rapid processes such as when flame local extinction, re-ignition, or flashback occur in a reacting flow. Here, an experimental approach for simultaneously probing two different species at high frame rates (50 kHz) is presented by employing a multi-YAG laser system. The laser radiation at 355 nm generated by a multi-YAG laser system was split into two beam paths: one beam for exciting formaldehyde and the other for pumping an optical parametric oscillator (OPO)...
November 18, 2016: Applied Spectroscopy
https://www.readbyqxmd.com/read/27858785/monitoring-micropollutants-in-the-swist-river-basin
#17
Ekkehard Christoffels, Andrea Brunsch, Jens Wunderlich-Pfeiffer, Franz Michael Mertens
Micropollutant pathways were studied for the Swist river basin (Western Germany). The aim was to verify the effectiveness of a monitoring approach to detect micropollutants entering the river. In a separate sewer system, water was frequently found to be contaminated with micropollutants. Improper connections of sewage canals to the stormwater network seemed to be the cause of pollution. Wastewater treatment plants (WWTPs) exerted the largest influence on micropollutants for the receiving river. During a flu outbreak, antibiotics in the Swist stemming from WWTPs increased remarkably...
November 2016: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/27857643/clinical-and-demographic-features-of-burn-injuries-in-karachi-a-six-year-experience-at-the-burns-centre-civil-hospital-karachi
#18
S A Ali, S Hamiz-Ul-Fawwad, E Al-Ibran, G Ahmed, A Saleem, D Mustafa, M Hussain
Burn injuries are a leading cause of morbidity and mortality, with 195,000 deaths annually. This study was conducted to identify the demographics of burn victims and the effect of different variables on the outcome of their injuries. 4016 patients admitted to the Burns Centre, Civil Hospital Karachi from January 2006 to December 2011 were retrospectively analyzed. Demographics, burn injury details and their outcome were recorded in a pre-designed questionnaire. Injuries were categorized as: fire, chemical, scald or electrical...
March 31, 2016: Annals of Burns and Fire Disasters
https://www.readbyqxmd.com/read/27847912/testosterone-therapy-in-men-with-testosterone-deficiency-are-we-beyond-the-point-of-no-return
#19
REVIEW
Abdulmaged Traish
Although testosterone therapy in men with testosterone deficiency was introduced in the early 1940s, utilization of this effective treatment approach in hypogonadal men is met with considerable skepticism and resistance. Indeed, for decades, the fear that testosterone may cause prostate cancer has hampered clinical progress in this field. Nevertheless, even after considerable knowledge was acquired that this fear is unsubstantiated, many in the medical community remain hesitant to utilize this therapeutic approach to treat men with hypogonadism...
November 2016: Investigative and Clinical Urology
https://www.readbyqxmd.com/read/27843858/clinical-study-of-burn-patients-requiring-admission-a-single-center-experience-at-north-eastern-indira-gandhi-regional-institute-of-health-and-medical-sciences
#20
Donkupar Khongwar, Ranendra Hajong, Jyoutishman Saikia, Noor Topno, Arup J Baruah, Ojing Komut
BACKGROUND: Although burns are a major problem in health care, a lot of the variation in risk factors exists from region to region which if uncovered correctly could help take effective prevention measures. AIMS AND OBJECTIVES: To assess the 3-year (January 2012 to January 2015) epidemiology of burn injuries admitted to our hospital (primary objective) and to find areas of improvement in burn care (secondary objective). MATERIALS AND METHODS: After obtaining ethical approval data were obtained from the medical record section regarding age, sex, residence, occupation, marital status, socioeconomic status, dates of admission and discharge, circumstances regarding the place, intent, cause, and source of heat...
April 2016: Journal of Family Medicine and Primary Care
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