keyword
MENU ▼
Read by QxMD icon Read
search

Flame study

keyword
https://www.readbyqxmd.com/read/29166068/pure-rotational-h2-thermometry-by-ultrabroadband-coherent-anti-stokes-raman-spectroscopy
#1
Trevor L Courtney, Alexis Bohlin, Brian D Patterson, Christopher J Kliewer
Coherent anti-Stokes Raman spectroscopy (CARS) is a sensitive technique for probing highly luminous flames in combustion applications to determine temperatures and species concentrations. CARS thermometry has been demonstrated for the vibrational Q-branch and pure-rotational S-branch of several small molecules. Practical advantages of pure-rotational CARS, such as multi-species detection, reduction of coherent line mixing and collisional narrowing even at high pressures, and the potential for more precise thermometry, have motivated experimental and theoretical advances in S-branch CARS of nitrogen (N2), for example, which is a dominant species in air-fed combustion processes...
June 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29157454/developing-a-new-intelligent-system-for-the-diagnosis-of-tuberculous-pleural-effusion
#2
Chengye Li, Lingxian Hou, Bishundat Yanesh Sharma, Huaizhong Li, ChengShui Chen, Yuping Li, Xuehua Zhao, Hui Huang, Zhennao Cai, Huiling Chen
BACKGROUND AND OBJECTIVE: In countries with high prevalence of tuberculosis (TB), clinicians often diagnose tuberculous pleural effusion (TPE) by using diagnostic tests, which have not only poor sensitivity, but poor availability as well. The aim of our study is to develop a new artificial intelligence based diagnostic model that is accurate, fast, non-invasive and cost effective to diagnose TPE. It is expected that a tool derived based on the model be installed on simple computer devices (such as smart phones and tablets) and be used by clinicians widely...
January 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29151189/the-environmental-pollutant-bde-209-regulates-no-cgmp-signaling-through-activation-of-nmda-receptors-in-neurons
#3
Jingsi Chen, Xiuying Li, Xiaomei Li, Dunjin Chen
The common flame retardant decabrominated diphenyl ether (BDE-209) is a persistent organic pollutant. Epidemiological studies have revealed that prenatal or postnatal exposure to BDE-209 can result in delayed cognitive development, and BDE-209 has been shown to be toxic to cultured neurons with maturation interference effects. However, its neurotoxic mechanism remains unclear. Nitric oxide/cyclic guanosine monophosphate (NO/cGMP) signaling plays an important role in regulating neuronal maturation. We examined the influence of BDE-209 (100, 200, and 400 nM) on NO production and cGMP levels signaling in rodent neurons in vitro, with or without pretreatment N-methyl-D-aspartate (NMDA) receptor antagonism...
November 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29149662/in-ovo-transformation-of-two-emerging-flame-retardants-in-japanese-quail-coturnix-japonica
#4
Nathalie Briels, Mari E Løseth, Tomasz M Ciesielski, Govindan Malarvannan, Giulia Poma, Sara A Kjærvik, Alexis Léon, Ronan Cariou, Adrian Covaci, Veerle L B Jaspers
Tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) and Dechlorane Plus (DP) are two chlorinated, alternative flame retardants that have been found in wild birds and bird eggs. Little is known about the fate and effect of these compounds in birds, especially during the vulnerable stages of embryonic development. To investigate the ability of birds to biotransform these compounds, an in ovo exposure experiment with Japanese quail eggs was performed. Quail eggs were injected in the yolk sac with 1000ng/g egg of TDCIPP (2...
November 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29149642/oxidative-stress-cell-cycle-arrest-dna-damage-and-apoptosis-in-adult-zebrafish-danio-rerio-induced-by-tris-1-3-dichloro-2-propyl-phosphate
#5
Hanyan Chen, Pingping Wang, Zhongkun Du, Guowei Wang, Shixiang Gao
Tris(1,3-dichloro-2-propyl)phosphate (TDCPP) is an additive flame retardant of high production volume, and frequently detected in biota and environment. However, knowledge on its potential risk and toxicological mechanism still remains limited. In this study, DNA damage, transcriptomic responses and biochemical changes in the liver of zebrafish (Danio rerio) induced by TDCPP were investigated. Zebrafish was exposed to 45.81μg/L (1/100 (96h-LC50)) and 229.05μg/L (1/20 (96h-LC50)) TDCPP for 7 d. The reactive oxygen species (ROS) and GSH contents, in addition to antioxidant enzyme activities in the liver changed significantly, and the mRNA levels of genes related to oxidative stress were alerted in a dose-dependent and/or sex-dependent manner after exposure to TDCPP...
November 10, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/29149472/which-commonly-monitored-chemical-contaminant-in-the-bohai-region-yangtze-and-pearl-rivers-of-china-poses-the-greatest-threat-to-aquatic-wildlife
#6
Andrew C Johnson, Monika D Jürgens, Chao Su, Meng Zhang, Yueqing Zhang, Yajuan Shi, Andrew Sweetman, Xiaowei Jin, Yonglong Lu
This study assessed the relative risk of 29 chemical contaminants to aquatic wildlife in the Bohai Region, Yangtze and Pearl Rivers of China. River monitoring data from 2010-2015 for metals, pesticides, plasticisers, surfactants, poly-aromatic hydrocarbons, flame retardants and ammonia were collected. For each chemical, ecotoxicity data were compiled for Chinese relevant aquatic species. The chemicals were ranked by relative risk either by comparing the ratios of the median river concentration divided by the median ecotoxicity concentration or the percentage of river measurements which exceeded the lower 10(th) percentile ecotoxicity value...
November 17, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29147747/isomers-of-tris-chloropropyl-phosphate-tcpp-in-technical-mixtures-and-environmental-samples
#7
Jimmy W Truong, Miriam L Diamond, Paul A Helm, Liisa M Jantunen
Tris(chloropropyl) phosphate (TCPP) is an environmentally abundant organophosphate ester (OPE). TCPP is comprised of four isomers with seven possible structures, eight CAS numbers, and even more common names. A review of 54 studies reporting one or more TCPP isomers confirmed that the most abundant and most often reported TCPP isomer was tris(2-chloro-1-methylethyl) phosphate, also known as tris(chloroisopropyl) phosphate (TCiPP, referred to hereafter as TCPP1). Full-scan gas chromatography-mass spectrometry (GC-MS) was used to identify the other three isomers numbered here according to their elution order on a non-polar GC column (DB-5): bis(2-chloro-1-methylethyl) (2-chloropropyl) phosphate (TCPP2), bis(2-chloropropyl)(2-chloro-1-methylethyl) phosphate (TCPP3), and tris(2-chloropropyl) phosphate (TCPP4)...
November 16, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29143341/a-toxicogenomics-approach-to-screen-chlorinated-flame-retardants-tris-2-chloroethyl-phosphate-and-tris-2-chloroisopropyl-phosphate-for-potential-health-effects
#8
Boris V Krivoshiev, Gerrit T S Beemster, Katrien Sprangers, Ronny Blust, Steven J Husson
Tris(2-chloroethyl) phosphate (TCEP) is a pervasive flame retardant that has been identified as a chemical of concern given its health effects and therefore its use has since been tightly regulated. Tris(2-chloroisopropyl) phosphate (TCIPP), an analogue of TCEP, is believed to be its replacement. However, compared to TCEP, little is known of the toxicological impacts of TCIPP. We used RNA sequencing as unbiased and sensitive tool to identify and compare effects on a transcriptome level of TCEP and TCIPP in the human hepatocellular carcinoma cell line, HepG2...
November 16, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/29137973/exposure-to-polybrominated-diphenyl-ethers-pbdes-and-child-behavior-current-findings-and-future-directions
#9
REVIEW
Ann M Vuong, Kimberly Yolton, Kim N Dietrich, Joseph M Braun, Bruce P Lanphear, Aimin Chen
Polybrominated diphenyl ethers (PBDEs) are recognized neurotoxicants, but the extent to which PBDEs influence various domains of behavior in children is not fully understood. As such, we reviewed epidemiologic studies published to date to provide an overview of the current state of knowledge on PBDEs' potential role in behavioral development. We identified 19 epidemiologic studies reporting on associations of prenatal and childhood concentrations of PBDEs with behaviors assessed in children from 1 to 12years, including executive function, attention, externalizing and internalizing behaviors, adaptive skills, and social behaviors/Autism Spectrum Disorder (ASD)...
November 11, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29137467/evaluation-of-serum-copper-level-in-naswar-smokeless-tobacco-addicts-using-flame-atomic-absorption-spectroscopy
#10
Asmat Ullah, Abad Khan, Zafar Iqbal, Ismail Khan
BACKGROUND: Substance abuse and its consequences are a matter of great concern in South-East Asian countries, especially Pakistan and Afghanistan. Due to contamination of Naswar with copper, or by any other physiological mechanism, there is a great chance of copper poisoning in addicts. Keeping in view the literature, there is no comparative study on serum copper levels (SCuL) in Naswar addicts. Therefore, it is very important to evaluate SCuL in this population. METHODS: The current study was performed in September 2016 where a total of 75 volunteers (selected from villages near the University of Peshawar, Pakistan) were grouped as Naswar addicts (n = 45) and the control group (n = 30)...
October 2017: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/29136871/a-novel-task-specific-magnetic-polymeric-ionic-liquid-for-selective-preconcentration-of-potassium-in-oil-samples-using-centrifuge-less-dispersive-liquid-liquid-microextraction-technique-and-its-determination-by-flame-atomic-emission-spectroscopy
#11
Asadollah Beiraghi, Masood Shokri
In the present study a new centrifuge-less dispersive liquid-liquid microextraction technique based on application of a new task specific magnetic polymeric ionic liquid (TSMPIL) as a chelating and extraction solvent for selective preconcentration of trace amounts of potassium from oil samples is developed, for the first time. After extraction, the fine droplets of TSMPIL were transferred into an eppendorf tube and diluted to 500µL using distilled water. Then, the enriched analyte was determined by flame atomic emission spectroscopy (FAES)...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29135044/occurrence-and-distribution-of-organophosphorus-flame-retardants-plasticizers-and-synthetic-musks-in-sediments-from-source-water-in-the-pearl-river-delta-china
#12
Xiangying Zeng, Liang Xu, Jing Liu, Yang Wu, Zhiqiang Yu
The Pearl River and its tributaries receive discharges of treated/untreated domestic sewage and industrial wastewater throughout the entire drainage basin. The river provides source water for many local inhabitants, and there is great concern over its pollution status. Fifteen sediment samples were collected from source water areas in the Pearl River Delta (PRD), and analyzed for the occurrence and distribution of two classes of emerging pollutants, namely, organophosphorus flame retardants (OPs) and synthetic musks...
November 14, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29134799/e-waste-driven-pollution-in-pakistan-the-first-evidence-of-environmental-and-human-exposure-to-flame-retardants-frs-in-karachi-city
#13
Mehreen Iqbal, Jabir Hussain Syed, Knut Breivik, Muhammad Jamshed Iqbal Chaudhry, Jun Li, Gan Zhang, Riffat Naseem Malik
Informal e-waste recycling activities have been shown to be a major emitter of organic flame retardants (FRs), contributing to both environmental and human exposure to laborers at e-waste recycling sites in some West African countries, as well as in China and India. The main objective of this study was to determine the levels of selected organic FRs in both air and soil samples collected from areas with intensive informal e-waste recycling activities in Karachi, Pakistan. Dechlorane Plus (DP) and "novel" brominated flame retardants (NBFRs) were often detected in high concentrations in soils, while phosphorus-based FRs (OPFRs) dominated atmospheric samples...
November 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29131338/characterization-of-volatile-sulfur-compounds-in-moutai-liquors-by-headspace-solid-phase-microextraction-gas-chromatography-pulsed-flame-photometric-detection-and-odor-activity-value
#14
Shuang Chen, Sha Sha, Michael Qian, Yan Xu
This study investigated the aroma contribution of volatile sulfur compounds (VSCs) in Moutai liquors. The VSCs were analyzed using headspace solid-phase microextraction-gas chromatography-pulsed flame photometric detection (HS-SPME-GC-PFPD). The influences of SPME fibers, ethanol content in the sample, pre-incubation time, and extraction temperature and time on the extraction of VSCs were optimized. The VSCs were optimally extracted using a divinylbenzene/carboxen/polydimethylsiloxane fiber, by incubating 10 mL diluted Chinese liquor (5% vol...
November 13, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/29129621/tdcpp-protects-cardiomyocytes-from-hypoxia-reoxygenation-injury-induced-apoptosis-through-mitigating-calcium-overload-and-promotion-gsk-3%C3%AE-phosphorylation
#15
Xiju He, Shoutian Li, Xiaoxia Fang, Yanhong Liao
TDCPP, Tris (1, 3-dichloro-2-propyl) phosphate belongs to a group of chemicals known as triester organophosphate flame retardants, It can alter calcium homeostasis at much lower concentrations in normal conditions, but the mechanism is unclear till now. Calcium overload is a leading cause of apoptosis in myocardial ischemia/reperfusion (I/R) injury, thus how to mitigate Ca(2+)-overload is deserved to be investigated. We therefore hypothesized that TDCPP could attenuate cardiomyocytes apoptosis in I/R injury...
November 9, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/29129432/occurrence-and-human-exposure-to-brominated-and-organophosphorus-flame-retardants-via-indoor-dust-in-a-brazilian-city
#16
Joyce Cristale, Tiago Gomes Aragão Belé, Silvia Lacorte, Mary Rosa Rodrigues de Marchi
Indoor dust is considered an important human exposure route to flame retardants (FRs), which has arised concern due the toxic properties of some of these substances. In this study, ten organophosphorus flame retardants (OPFRs), eight polybrominated diphenyl ethers (PBDEs) and four new brominated flame retardants (NBFRs) were determined in indoor dust from different places in Araraquara-SP (Brazil). The sampled places included houses, apartments, offices, primary schools and cars. The analysis of the sample extracts was performed by gas chromatography coupled to mass spectrometry and two ionization techniques were used (electron ionization - EI; electron capture negative ionization - ECNI)...
November 9, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29128944/health-risk-assessment-of-instant-noodles-commonly-consumed-in-port-harcourt-nigeria
#17
Iniobong A Charles, Atieme J Ogbolosingha, Inimfon U Afia
The current study investigated the levels of some heavy metals [lead (Pb), arsenic (As), nickel (Ni), mercury (Hg), copper (Cu), cadmium (Cd), aluminum (Al), and chromium (Cr)] and polycyclic aromatic hydrocarbons (PAHs) in six brands of instant noodles (CFN, GFC, NGP, GAA, CUN, and FCS) commonly consumed in Port Harcourt, Nigeria. Risks of consumption of contaminated noodles were also assessed. Heavy metal content and PAHs were determined using flame atomic absorption spectrophotometer and gas chromatography, respectively...
November 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29128827/a-comparison-study-on-a-sulfonated-graphene-polyaniline-nanocomposite-coated-fiber-for-analysis-of-nicotine-in-solid-samples-through-the-traditional-and-vacuum-assisted-hs-spme
#18
Alireza Ghiasvand, Samira Koonani, Fatemeh Yazdankhah, Saeid Farhadi
A simple, rapid, and reliable headspace solid-phase microextraction (HS-SPME) procedure, reinforced by applying vacuum in the extraction vial, was developed. It was applied for the extraction of nicotine in solid samples prior to determination by gas chromatography-flame ionization detection (GC-FID). First, the surface of a narrow stainless steel wire was made porous and adhesive by platinization to obtain a durable, higher surface area, and resistant fiber. Then, a thin film of sulfonated graphene/polyaniline (Sulf-G/PANI) nanocomposite was synthesized and simultaneously coated on the platinized fiber using the electrophoretic deposition (EPD) method...
November 6, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29128824/a-new-model-based-on-adiabatic-flame-temperature-for-evaluation-of-the-upper-flammable-limit-of-alkane-air-co2-mixtures
#19
Mingqiang Wu, Gequn Shu, Rui Chen, Hua Tian, Xueying Wang, Yue Wang
For security issue of alkane used in Organic Rankine Cycle, a new model to evaluate the upper flammability limits for mixtures of alkanes, carbon dioxide and air has been proposed in present study. The linear relationship was found at upper flammability limits between molar fraction of diluent in alkane-CO2 mixture and calculated adiabatic flame temperature. The prediction ability of the variable calculated adiabatic flame temperature model that incorporated the linear relationship above is greatly better than the models that adopted the fixed calculated adiabatic flame temperature at upper flammability limit...
October 17, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29128725/flame-deflagration-in-side-on-vented-detonation-tubes-a-large-scale-study
#20
Mohammed J Ajrash, Jafar Zanganeh, Behdad Moghtaderi
Venting is often used in process industries to reduce the possibility of dangerous rises in pressure levels and the severity of explosions. To date, the effectiveness of side-on venting on methane flame deflagration in large scale operations has not been clearly addressed. This work explicitly investigates the influences of side-on venting on varied methane flame deflagration concentrations in a 30m long Detonation Tube (DT). RESULTS: corresponding to this study prove the existence of a significant correlation between the fire and explosion driving parameters such as pressure rise and flame propagation velocity with the vent location...
November 7, 2017: Journal of Hazardous Materials
keyword
keyword
69154
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"