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https://www.readbyqxmd.com/read/27236405/suppression-of-dioxins-after-the-post-combustion-zone-of-mswis
#1
Mingxiu Zhan, Tong Chen, Xiaoqing Lin, Jianying Fu, Xiaodong Li, Jianhua Yan, Alfons Buekens
Thiourea was selected as representative of combined S- and N-inhibitors and injected after the post-combustion zone of two full-scale municipal solid waste incinerators (MSWIs) using a dedicated feeder. Firstly, the operating conditions were scrutinised by monitoring the concentrations of SO2, NH3 and HCl in the clean flue gas. The suppression experiment showed that in MSWI A thiourea could reduce the total I-TEQ value in flue gas by 73.4% from 1.41ng I-TEQ/Nm(3) to 0.37I-TEQ/Nm(3), those in fly ash by 87.1% from 14...
August 2016: Waste Management
https://www.readbyqxmd.com/read/26421943/design-strategies-for-ceo2-moo3-catalysts-for-denox-and-hg-0-oxidation-in-the-presence-of-hcl-the-significance-of-the-surface-acid-base-properties
#2
Huazhen Chang, Qingru Wu, Tao Zhang, Mingguan Li, Xiaoxu Sun, Junhua Li, Lei Duan, Jiming Hao
A series of CeMoOx catalysts with different surface Ce/Mo ratios was synthesized by a coprecipitation method via changing precipitation pH value. The surface basicity on selective catalytic reduction (SCR) catalysts (CeMoOx and VMo/Ti) was characterized and correlated to the durability and activity of catalyst for simultaneous elimination of NOx and Hg(0). The pH value in the preparation process affected the surface concentrations of Ce and Mo, the Brunauer-Emmett-Teller (BET) specific surface area, and the acid-base properties over the CeMoOx catalysts...
October 20, 2015: Environmental Science & Technology
https://www.readbyqxmd.com/read/24963840/a-novel-mechanism-for-poisoning-of-metal-oxide-scr-catalysts-base-acid-explanation-correlated-with-redox-properties
#3
Huazhen Chang, Junhua Li, Wenkang Su, Yuankai Shao, Jiming Hao
A novel mechanism is proposed for the poisoning effect of acid gases and N2O formation on SCR catalysts involving base-acid properties correlated with redox ability of M-O or M-OH (M = Ce or V) of metal oxides and the strength of their basicity responsible for resistance to HCl and SO2 at medium and low temperatures.
September 11, 2014: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/24830145/quantitative-elisa-kit-for-paralytic-shellfish-toxins-coupled-with-sample-pretreatment
#4
Shigeru Sato, Yoshinobu Takata, Sunaho Kondo, Akiko Kotoda, Naoto Hongo, Masaaki Kodama
A new ELISA kit to quantitate the level of paralytic shellfish poisoning (PSP) toxins in crude shellfish extracts was developed. A conjugate for preparing antigen and a novel antibody used in the ELISA was prepared based on the unique reactions between C11-O-sulfate toxins such as gonyautoxins 2 and 3 (GTX2,3) and various thiol compounds, followed by coupling to keyhole limpet hemocyanin. The compounds necessary for competitive ELISA, labeled toxin and an artificial standard toxin to replace saxitoxin in the analysis, were also produced by the same techniques...
March 2014: Journal of AOAC International
https://www.readbyqxmd.com/read/24397750/anatomical-mercury-speciation-in-bay-scallops-by-thio-bearing-chelating-resin-concentration-and-gc-electron-capture-detector-determination
#5
Qihua Zhang, Guipeng Yang
The highly toxic methyl-, ethyl- and phenylmercury species that may exist in the three main anatomical parts - the adductor muscle, the mantle and the visceral mass - of bay scallops (Argopecten irradias) were quantitatively released by cupric chloride, zinc acetate, sodium chloride and hydrochloric acid (HCl) under ultrasonic extraction. After centrifugation, the mercury species in the supernatant were concentrated by thio (SH)-bearing chelating resins, eluted with HClO4 and HCl and extracted with toluene...
2014: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/24332734/catalytic-oxidation-of-hg-0-by-mnox-ceo2-%C3%AE-al2o3-catalyst-at-low-temperatures
#6
Pengying Wang, Sheng Su, Jun Xiang, Huawei You, Fan Cao, Lushi Sun, Song Hu, Yun Zhang
MnOx-CeO2/γ-Al2O3 (MnCe) selective catalytic reduction (SCR) catalysts prepared by sol-gel method were employed for low-temperature Hg(0) oxidation on a fixed-bed experimental setup. BET, XRD and XPS were used to characterize the catalysts. MnCe catalysts exhibited high Hg(0) oxidation activity at low temperatures (100-250 °C) under the simulated flue gas (O2, CO2, NO, SO2, HCl, H2O and balanced with N2). Only a small decrease in mercury oxidation was observed in the presence of 1200 ppm SO2, which proved that the addition of Ce helped resist SO2 poisoning...
April 2014: Chemosphere
https://www.readbyqxmd.com/read/23603616/new-anticancer-active-and-selective-phenylene-bisbenzothiazoles-synthesis-antiproliferative-evaluation-and-dna-binding
#7
Livio Racané, Sandra Kraljević Pavelić, Raja Nhili, Sabine Depauw, Charles Paul-Constant, Ivana Ratkaj, Marie-Hélène David-Cordonnier, Krešimir Pavelić, Vesna Tralić-Kulenović, Grace Karminski-Zamola
Novel amidino-derivatives of phenylene-bisbenzothiazoles were synthesized and tested for their antiproliferative activity against several human cancer cell lines, as well as DNA-binding properties. The synthetic approach used for preparation of isomeric amidino substituted-phenylene-bis-benzothyazoles 3a-3f was achieved by condensation reaction of isophthaloyl dichloride 1a and terephthaloyl dichloride 1b or with phthalic acid 1c with 5-amidinium-2-aminobenzothiolate 2a and 5-(imidazolinium-2-yl)-2-aminobenzothiolate 2b in good yields...
May 2013: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/23431799/-transfer-characteristics-of-cadmium-in-soil-vegetable-insect-food-chain
#8
Ping Ding, Ping Zhuang, Zhi-An Li, Han-Ping Xia, Yi-Ping Tai, Huan-Ping Lu
Taking two kinds of vegetables (Brassica rapa and Amaranthus mangostanus) and one insect species (Prodenia litura) as test materials, a greenhouse pot experiment was conducted to study the transfer characteristics of cadmium (Cd) in soil-vegetable-insect food chain and the distribution patters of different Cd chemical forms in the organs of the two vegetables. With the increasing concentration of applied Cd in soil, the biomass of the two vegetables decreased significantly, while the Cd concentration in the vegetables had a significant increase...
November 2012: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/22970577/rapid-liquid-chromatography-for-paralytic-shellfish-toxin-analysis-using-superficially-porous-chromatography-with-aoac-official-method-2005-06
#9
Robert G Hatfield, Andrew D Turner
The bioaccumulation of paralytic shellfish toxins in mussels, oysters, cockles, hard clams, razors, and king scallops is monitored in England, Scotland, and Wales by AOAC Official Method 2005.06 LC-with fluorescence detection (FLD). One of the commonly perceived disadvantages of using this method is the long turnaround time and low throughput in a busy laboratory environment. The chromatographic analysis of each sample typically utilizes a 15 min cycle time to achieve toxin oxidation product separation and column equilibration prior to subsequent analysis...
July 2012: Journal of AOAC International
https://www.readbyqxmd.com/read/22941217/common-childhood-poisonings-and-their-outcome-in-a-tertiary-care-center-in-delhi
#10
Vidya Brata Ghosh, Urmila Jhamb, Ritika Singhal, Rajeshwari Krishnan
Clinical profile of children presenting with poisoning to the Pediatric emergency department of a tertiary care hospital in Delhi from 8.1.2009 to 8.10.09 was studied prospectively. Fifty two cases of accidental poisoning were reported during this period which formed 1.05 % of all pediatric admissions (5094 admissions). No case of homicidal poisoning was reported. There were 80.7 % children between 1-5 y of age with male preponderance. PICA was observed in 57.7 % children. Overall mortality was 7.7 % and 11...
June 2013: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/22937683/clinical-and-epidemiological-features-of-acute-corrosive-poisonings
#11
Andon Chibishev, Zenina Pareska, Vesna Chibisheva, Natasa Simonovska
BACKGROUND: the ingestion of chemical agents, of caustic nature, represents a serious problem for clinical toxicology. If the ingestion doesn't cause death during the acute period, it will most often cause severe side effects in the upper gastrointestinal tract during the chronic phase. AIMS: The purpose of this study is to show the clinical, epidemiological and socio-economical characteristics seen in acute corrosive poisonings such as ingested caustic agents, causes for abuse and most consequential complications...
2012: Medical Archives
https://www.readbyqxmd.com/read/22920612/temporal-trends-and-spatial-variation-characteristics-of-hazardous-air-pollutant-emission-inventory-from-municipal-solid-waste-incineration-in-china
#12
Hezhong Tian, Jiajia Gao, Long Lu, Dan Zhao, Ke Cheng, Peipei Qiu
A multiple-year emission inventory of hazardous air pollutants (HAPs), including particulate matter (PM), SO(2), NO(x), CO, HCl, As, Cd, Cr, Hg, Ni, Pb, Sb, and polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs), discharged from municipal solid waste (MSW) incineration in China has been established for the period 2003-2010 by using the best available emission factors and annual activity data. Our results show that the total emissions have rapidly amounted to 28,471.1 t of NO(x), 12,062...
September 18, 2012: Environmental Science & Technology
https://www.readbyqxmd.com/read/22885043/development-and-validation-of-an-ion-pair-chromatographic-method-for-simultaneous-determination-of-trans-and-cis-urocanic-acid-in-fish-samples
#13
Davood Zare, Kharidah Muhammad, Mohd Hair Bin Bejo, Hasanah Mohd Ghazali
Urocanic acid (UCA) has been reported to be a mast cell degranulator and has also been suggested as a complementary agent in implicated scombroid fish poisoning. In this research, a new method is described to extract, clean up and perform simultaneous ion-pair chromatographic analysis of trans- and cis-urocanic acid (UCA) in fish samples. UCA was extracted using 0.05 M HCl and protein was removed from the extract by precipitation with 10% trisodium citrate and 10% citric acid. The HPLC method that is developed showed a rapid, precise and sensitive method with short retention time for simultaneous separation of UCA isomers in fish samples...
September 21, 2012: Journal of Chromatography. A
https://www.readbyqxmd.com/read/22816272/determination-of-paralytic-shellfish-toxins-in-shellfish-by-receptor-binding-assay-collaborative-study
#14
Frances M Van Dolah, Spencer E Fire, Tod A Leighfield, Christina M Mikulski, Gregory J Doucette
A collaborative study was conducted on a microplate format receptor binding assay (RBA) for paralytic e shellfish toxins (PST). The assay quantifies the composite PST toxicity in shellfish samples based on the ability of sample extracts to compete with (3)H saxitoxin (STX) diHCl for binding to voltage-gated sodium channels in a rat brain membrane preparation. Quantification of binding can be carried out using either a microplate or traditional scintillation counter; both end points were included in this study...
May 2012: Journal of AOAC International
https://www.readbyqxmd.com/read/22683532/a-comparative-study-for-psp-toxins-quantification-by-using-mba-and-hplc-official-methods-in-shellfish
#15
COMPARATIVE STUDY
B Ben-Gigirey, M L Rodríguez-Velasco, A Otero, J M Vieites, A G Cabado
Commission Regulation (EC) N° 2074/2005 recognises the biological method as the reference method for Paralytic Shellfish Poisoning (PSP) toxins detection in molluscs. It was amended by Commission Regulation (EC) N° 1664/2006 that accepted the so-called Lawrence method as an alternative to the reference method. The goal of this study was to compare AOAC Official Methods of Analysis 959.08 (Biological method) and 2005.06 (Prechromatographic Oxidation and Liquid Chromatography with fluorescence detection) in samples with different toxin profiles...
October 2012: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/22562349/evaluating-of-arsenic-v-removal-from-water-by-weak-base-anion-exchange-adsorbents
#16
M Rabiul Awual, M Amran Hossain, M A Shenashen, Tsuyoshi Yaita, Shinichi Suzuki, Akinori Jyo
Arsenic contamination of groundwater has been called the largest mass poisoning calamity in human history and creates severe health problems. The effective adsorbents are imperative in response to the widespread removal of toxic arsenic exposure through drinking water. Evaluation of arsenic(V) removal from water by weak-base anion exchange adsorbents was studied in this paper, aiming at the determination of the effects of pH, competing anions, and feed flow rates to improvement on remediation. Two types of weak-base adsorbents were used to evaluate arsenic(V) removal efficiency both in batch and column approaches...
January 2013: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/22138287/investigations-into-matrix-components-affecting-the-performance-of-the-official-bioassay-reference-method-for-quantitation-of-paralytic-shellfish-poisoning-toxins-in-oysters
#17
COMPARATIVE STUDY
Andrew D Turner, Monika Dhanji-Rapkova, Myriam Algoet, Benjamin A Suarez-Isla, Marco Cordova, Catherine Caceres, Cory J Murphy, Melanie Casey, David N Lees
Significant differences previously observed in the determination of paralytic shellfish poisoning toxins (PSTs) in oysters using official method AOAC 2005.06 and 959.08 were investigated in detail with regard to possible matrix effects. Method AOAC 2005.06 gave results 2-3 times higher than the mouse bioassay method, 959.08, differences thought to be due to underestimation of PSTs by the mouse bioassay. In order to prove the cause of these large differences, work was conducted here to examine the presence and effects of matrix components on the performance of each of the two assays...
February 2012: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/21088173/comparison-of-blood-lead-and-blood-and-plasma-%C3%AE-aminolevulinic-acid-concentrations-as-biomarkers-for-lead-poisoning-in-cattle
#18
Hwan Goo Kang, Karyn Bischoff, Joseph G Ebel, Sang Ho Cha, James McCardle, Cheong Up Choi
Lead (Pb) concentrations in whole blood and δ-aminolevulinic acid (ALA) concentrations in plasma and whole blood from 37 cattle with suspected Pb exposure were determined in order to investigate the usefulness of ALA as a biological indicator for Pb poisoning in cattle. Cows were divided into 4 groups based on blood Pb, as follows: <30 ppb (group 1), 30-100 ppb (group 2), 100-300 ppb (group 3), and >300 ppb (group 4). The derivatization reaction for ALA was improved by a greater than 2-fold measure in whole blood and by a 10-fold measure in plasma by adding 75 and 50 µl of 0...
November 2010: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/21057506/otx2-controls-neuron-subtype-identity-in-ventral-tegmental-area-and-antagonizes-vulnerability-to-mptp
#19
COMPARATIVE STUDY
Michela Di Salvio, Luca Giovanni Di Giovannantonio, Dario Acampora, Raffaele Prosperi, Daniela Omodei, Nilima Prakash, Wolfgang Wurst, Antonio Simeone
Mesencephalic-diencephalic dopaminergic neurons control locomotor activity and emotion and are affected in neurodegenerative and psychiatric diseases. The homeoprotein Otx2 is restricted to ventral tegmental area (VTA) neurons that are prevalently complementary to those expressing Girk2 and glycosylated active form of the dopamine transporter (Dat). High levels of glycosylated Dat mark neurons with efficient dopamine uptake and pronounced vulnerability to Parkinsonian degeneration. We found that Otx2 controls neuron subtype identity by antagonizing molecular and functional features of dorsal-lateral VTA, such as Girk2 and Dat expression...
December 2010: Nature Neuroscience
https://www.readbyqxmd.com/read/20921988/responses-of-staphylococcus-aureus-exposed-to-hcl-and-organic-acid-stress
#20
Tone Mari Rode, Trond Møretrø, Solveig Langsrud, Oyvind Langsrud, Gjermund Vogt, Askild Holck
Staphylococcus aureus is an important food poisoning bacterium. In food preservation, acidification is a well-known method. Permeant weak organic acids, like lactic and acetic acids, are known to be more effective against bacteria than inorganic strong acids (e.g., HCl). Growth experiments and metabolic and transcriptional analyses were used to determine the responses of a food pathogenic S. aureus strain exposed to lactic acid, acetic acid, and HCl at pH 4.5. Lactic and acetic acid stress induced a slower transcriptional response and large variations in growth patterns compared with the responses induced by HCl...
September 2010: Canadian Journal of Microbiology
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