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https://www.readbyqxmd.com/read/27908627/validation-of-a-two-generational-reproduction-test-in-daphnia-magna-an-interlaboratory-exercise
#1
Carlos Barata, Bruno Campos, Claudia Rivetti, Gerald A LeBlanc, Stephanie Eytcheson, Stephanie McKnight, Marysia Tobor-Kaplon, Selinda de Vries Buitenweg, Suhyon Choi, Jinhee Choi, Elena I Sarapultseva, Marie-Agnès Coutellec, Maïra Coke, Pascal Pandard, Arnaud Chaumot, Hervé Quéau, Nicolas Delorme, Olivier Geffard, Fernando Martínez-Jerónimo, Haruna Watanabe, Norihisa Tatarazako, Isabel Lopes, João L T Pestana, Amadeu M V M Soares, Cecilia Manuela Pereira, Karel De Schamphelaere
Effects observed within one generation disregard potential detrimental effects that may appear across generations. Previously we have developed a two generation Daphnia magna reproduction test using the OECD TG 211 protocol with a few amendments, including initiating the second generation with third brood neonates produced from first generation individuals. Here we showed the results of an inter-laboratory calibration exercise among 12 partners that aimed to test the robustness and consistency of a two generation Daphnia magna reproduction test...
November 28, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27898012/hydrodechlorination-of-tetrachloromethane-over-palladium-catalysts-supported-on-mixed-mgf%C3%A2-mgo-carriers
#2
Magdalena Bonarowska, Maria Wojciechowska, Maciej Zieliński, Angelika Kiderys, Michał Zieliński, Piotr Winiarek, Zbigniew Karpiński
Pd/MgO, Pd/MgF₂ and Pd/MgO-MgF₂ catalysts were investigated in the reaction of CCl₄ hydrodechlorination. All the catalysts deactivated in time on stream, but the degree of deactivation varied from catalyst to catalyst. The MgF₂-supported palladium with relatively large metal particles appeared the best catalyst, characterized by good activity and selectivity to C₂-C₅ hydrocarbons. Investigation of post-reaction catalyst samples allowed to find several details associated with the working state of hydrodechlorination catalysts...
November 25, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27894701/design-of-a-new-pid-controller-using-predictive-functional-control-optimization-for-chamber-pressure-in-a-coke-furnace
#3
Jianming Zhang
An improved proportional-integral-derivative (PID) controller based on predictive functional control (PFC) is proposed and tested on the chamber pressure in an industrial coke furnace. The proposed design is motivated by the fact that PID controllers for industrial processes with time delay may not achieve the desired control performance because of the unavoidable model/plant mismatches, while model predictive control (MPC) is suitable for such situations. In this paper, PID control and PFC algorithm are combined to form a new PID controller that has the basic characteristic of PFC algorithm and at the same time, the simple structure of traditional PID controller...
November 25, 2016: ISA Transactions
https://www.readbyqxmd.com/read/27894684/systematic-review-of-the-use-of-the-lymphocyte-cytokinesis-block-micronucleus-assay-to-measure-dna-damage-induced-by-exposure-to-polycyclic-aromatic-hydrocarbons
#4
REVIEW
Radim J Sram, Vlasta Svecova, Andrea Rossnerova
The effect of exposure to polycyclic aromatic hydrocarbons (PAHs) to induce micronuclei (MN) measured using the lymphocytes cytokinesis-block micronucleus (CBMN) assay were evaluated in 34 studies according to the exposure: 20 studies in coke oven workers, 7 studies in different occupational exposures as alluminium industry workers, rubber factory workers, road construction workers, airport workers and diesel exposed workers, 6 studies on environmentaly exposed groups as police, volunteers and children. Reviewed papers indicate that the CBMN assay is a sensitive biomarker of PAHs exposure in polluted air...
October 2016: Mutation Research
https://www.readbyqxmd.com/read/27885241/effects-of-coke-oven-emissions-and-benzo-a-pyrene-on-blood-pressure-and-electrocardiogram-in-coke-oven-workers
#5
Kai Yang, Xuejun Jiang, Shuqun Cheng, Chengzhi Chen, Xianqing Cao, Baijie Tu
OBJECTIVE: To evaluate the effects of occupational exposures to coke oven emissions (COEs) and benzo[a]pyrene (B[a]P) on the prevalence of hypertension and abnormal electrocardiogram (ECG) in coke oven workers. METHODS: We included 880 coke oven workers and 710 oxygen employees in the exposed and control groups, respectively. Blood pressure (BP), ECG, blood lipid levels, and glucose levels of all subjects were measured. COE and B[a]P concentrations at the bottom, side, and top of the oven and control plants were estimated by weighing and high-performance liquid chromatography...
November 22, 2016: Journal of Occupational Health
https://www.readbyqxmd.com/read/27884050/taking-the-sweetness-out-of-the-share-a-coke-marketing-campaign-the-influence-of-personalized-labelling-on-elementary-school-children-s-bottled-drink-choices
#6
F McDarby, D O'Hora, D O'Shea, M Byrne
BACKGROUND: Drink personalization (featuring names on bottle labels) has been used by soft drink companies to make their drinks attractive to children, potentially increasing consumption. To date, no publically available research has evaluated the influence of personalization on children's drink choices. OBJECTIVES: To determine (i) whether personalizing bottled drinks influences children's drink choices; (ii) whether it is comparably effective in promoting healthy and unhealthy drinks and (iii) whether drink choices are affected by self-esteem, body mass index and parental factors...
November 24, 2016: Pediatric Obesity
https://www.readbyqxmd.com/read/27883954/feasibility-of-using-a-microalgal-bacterial-consortium-for-treatment-of-toxic-coke-wastewater-with-concomitant-production-of-microbial-lipids
#7
Byung-Gon Ryu, Jungmin Kim, Jong-In Han, Ji-Won Yang
This study examined the feasibility of using an algal-bacterial process for removal of phenol and NH4(+)-N from differently diluted coke wastewater with simultaneous production of biomass. Under illumination, microalgal-bacterial (MSB) cultures performed complete phenol degradation at all dilutions of coke wastewater while sole microalgal culture (MSA) degraded a maximum of 27.3% of phenol (initial concentration: 24.0mgL(-1)) from 5-fold diluted wastewater. Furthermore, the MSB culture had the highest rate of NH4(+)-N removal (8...
November 9, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27877912/photocatalytic-activities-of-coke-carbon-g-c3n4-and-bi-metal-bi-mixed-oxides-g-c3n4-nanohybrids-for-the-degradation-of-pollutants-in-wastewater
#8
Marta Sierra, Emma Borges, Pedro Esparza, Jorge Méndez-Ramos, Jesús Martín-Gil, Pablo Martín-Ramos
Different g-C3N4 composite systems (coke carbon/g-C3N4, Bi/Bi2WO6/g-C3N4 and Bi/Bi2MoO6/g-C3N4) have been assessed as photocatalysts for wastewater pollutants removal. The coke carbon/g-C3N4 hybrid, produced by thermal treatment at 550 °C of a composite made from melamine cyanurate and coke, only showed activity under UV-light irradiation. On the other hand, inorganic Bi spheres/Bi mixed oxides/g-C3N4 nanohybrids (Bi/Bi2WO6/g-C3N4 and Bi/Bi2MoO6/g-C3N4 composites), produced by thermal reduction of Bi2WO6 or Bi2MoO6 by g-C3N4, exhibited a remarkable red-shift, up to 620 nm, and allowed the visible-light driven degradation of the contaminant, albeit in combination with some adsorption...
2016: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/27876869/discerning-the-location-and-nature-of-coke-deposition-from-surface-to-bulk-of-spent-zeolite-catalysts
#9
Arun Devaraj, Murugesan Vijayakumar, Jie Bao, Mond F Guo, Miroslaw A Derewinski, Zhijie Xu, Michel J Gray, Sebastian Prodinger, Karthikeyan K Ramasamy
The formation of carbonaceous deposits (coke) in zeolite pores during catalysis leads to temporary deactivation of catalyst, necessitating regeneration steps, affecting throughput, and resulting in partial permanent loss of catalytic efficiency. Yet, even to date, the coke molecule distribution is quite challenging to study with high spatial resolution from surface to bulk of the catalyst particles at a single particle level. To address this challenge we investigated the coke molecules in HZSM-5 catalyst after ethanol conversion treatment by a combination of C K-edge X-ray absorption spectroscopy (XAS), (13)C Cross polarization-magic angle spinning nuclear magnetic resonance (CP-MAS NMR) spectroscopy, and atom probe tomography (APT)...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27871041/toxicity-of-aqueous-vanadium-to-zooplankton-and-phytoplankton-species-of-relevance-to-the-athabasca-oil-sands-region
#10
Stephanie Schiffer, Karsten Liber
Vanadium (V) is an abundant trace metal present in bitumen from the Athabasca Oil Sands (AOS) region in Alberta, Canada. The upgrading of bitumen can result in the production of large volumes of a carbonaceous material referred to as petroleum coke that contains V at elevated levels compared to the native bitumen. Previous studies have shown that coke has the capacity to leach ecotoxicologically relevant levels of V into water it contacts, yet limited data are available on the toxicity of aqueous V to planktonic organisms...
November 18, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27869242/sperm-quality-and-dna-integrity-of-coke-oven-workers-exposed-to-polycyclic-aromatic-hydrocarbons
#11
Hueiwang Anna Jeng, Chih-Hong Pan, Mu-Rong Chao, Chien-Chih Chiu, Guodong Zhou, Chon-Kit Chou, Wen-Yi Lin
OBJECTIVES: The objective of this study was to assess sperm quality and deoxyribonucleic acid (DNA) integrity of coke oven workers exposed to polycyclic aromatic hydrocarbons (PAHs) as compared to control subjects. MATERIAL AND METHODS: The coke oven workers (N = 52) and administrative staff (N = 35) of a steel plant served as the exposed and control groups, respectively. Exposure to PAHs was assessed by measuring 1-hydroxypyren. Analysis of sperm quality (concentration, motility, vitality, and morphology) was performed simultaneously with sperm DNA integrity analysis, including DNA fragmentation, denaturation, bulky DNA adducts, and 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxo-dGuo)...
November 18, 2016: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/27869228/catalytic-conversion-of-lignin-pyrolysis-model-compound-guaiacol-and-its-kinetic-model-including-coke-formation
#12
Huiyan Zhang, Yun Wang, Shanshan Shao, Rui Xiao
Lignin is the most difficult to be converted and most easy coking component in biomass catalytic pyrolysis to high-value liquid fuels and chemicals. Catalytic conversion of guaiacol as a lignin model compound was conducted in a fixed-bed reactor over ZSM-5 to investigate its conversion and coking behaviors. The effects of temperature, weight hourly space velocity (WHSV) and partial pressure on product distribution were studied. The results show the maximum aromatic carbon yield of 28.55% was obtained at temperature of 650 °C, WHSV of 8 h(-1) and partial pressure of 2...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27866543/-influence-of-coke-oven-emissions-on-workers-blood-pressure-and-electrocardiographic-findings
#13
J J Liang, G L Yi, G S Mao, D M Wang, X Y Dai
Objective: To investigate the influence of coke oven emissions on workers' blood pressure and electrocardiographic findings, and to provide a basis for the prevention and treatment of cardiovascular diseases. Methods: The concentration of coke oven emissions at the bottom, side, and top of coke ovens was determined in a coking plant. A total of 406 coke oven workers were enrolled as exposure group and 201 office staff members were enrolled as control group. Blood pressure and electrocardiographic findings were compared between the two groups, and the multivariate logistic regression analysis was performed to analyze the influencing factors for hypertension and abnormal electrocardiographic findings...
September 20, 2016: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/27862050/impact-of-individual-and-neighborhood-factors-on-cardiovascular-risk-in-white-hispanic-and-non-hispanic-women-and-men
#14
Tanya Cohn, Arlene Miller, Louis Fogg, Lynne T Braun, Lola Coke
Cardiovascular disease (CVD) is the leading cause of mortality for adults in the US, regardless of ethnicity. A cross-sectional correlational design was used to describe and compare CVD risk and cardiac mortality in White Hispanic and non-Hispanic women and men. Data from 3,317 individuals (1,523 women and 1,794 men) hospitalized for non-cardiac causes during 2012-2013, and data from the 2010 United States Census were included. The sex-specific 10-year Framingham General Cardiovascular Risk Score (FRS-10) was used to estimate long-term risk for major cardiac events...
November 16, 2016: Research in Nursing & Health
https://www.readbyqxmd.com/read/27859311/basic-mechanism-of-button-battery-ingestion-injuries-and-novel-mitigation-strategies-after-diagnosis-and-removal
#15
Kris R Jatana, Keith Rhoades, Scott Milkovich, Ian N Jacobs
OBJECTIVES/HYPOTHESIS: Button battery (BB) injuries continue to be a significant source of morbidity and mortality, and there is a need to confirm the mechanism of injury for development of additional mitigation strategies. STUDY DESIGN: Cadaveric piglet esophageal model. METHODS: Lithium, silver oxide, alkaline, and zinc-air BBs were placed in thawed sections of cadaveric piglet esophagus, bathed in normal saline. Severity of gross visual burn, pH, and temperature were recorded every 30 minutes for 6 hours...
November 9, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27834976/chemical-vapor-deposition-prepared-sub-nanometer-zr-clusters-on-pd-surfaces-promotion-of-methane-dry-reforming
#16
Lukas Mayr, Xue-Rong Shi, Norbert Köpfle, Cory A Milligan, Dmitry Y Zemlyanov, Axel Knop-Gericke, Michael Hävecker, Bernhard Klötzer, Simon Penner
An inverse Pd-Zr model catalyst was prepared by chemical vapor deposition (CVD) using zirconium-t-butoxide (ZTB) as an organometallic precursor. Pd-Zr interaction was then investigated with focus on the correlation of reforming performance with the oxidation state of Zr. As test reactions, dry reforming of methane (DRM) and methanol steam reforming (MSR) were chosen. Depending on treatments, either ZrOxHy or ZrO2 overlayers or Zr as sub-nanometer clusters could be obtained. Following the adsorption of ZTB on Pd(111), a partially hydroxylated Zr(4+)-containing layer was formed, which can be reduced to metallic Zr by thermal annealing in ultrahigh vacuum, leading to redox-active Zr(0) sub-nanometer clusters...
November 11, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27834884/identification-of-potential-sources-of-mercury-hg-in-farmland-soil-using-a-decision-tree-method-in-china
#17
Taiyang Zhong, Dongmei Chen, Xiuying Zhang
Identification of the sources of soil mercury (Hg) on the provincial scale is helpful for enacting effective policies to prevent further contamination and take reclamation measurements. The natural and anthropogenic sources and their contributions of Hg in Chinese farmland soil were identified based on a decision tree method. The results showed that the concentrations of Hg in parent materials were most strongly associated with the general spatial distribution pattern of Hg concentration on a provincial scale...
November 9, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27830362/numeracy-predicts-risk-of-pre-hospital-decision-delay-a-retrospective-study-of-acute-coronary-syndrome-survival
#18
Dafina Petrova, Rocio Garcia-Retamero, Andrés Catena, Edward Cokely, Ana Heredia Carrasco, Antonio Arrebola Moreno, José Antonio Ramírez Hernández
BACKGROUND: Many patients delay seeking medical attention during acute coronary syndromes (ACS), profoundly increasing their risk for death and major disability. Although research has identified several risk factors, efforts to improve patient decision making have generally been unsuccessful, prompting a call for more research into psychological factors. PURPOSE: The purpose of this study is to estimate the relationship between ACS decision delay and numeracy, a factor closely related to general decision making skill and risk literacy...
November 9, 2016: Annals of Behavioral Medicine: a Publication of the Society of Behavioral Medicine
https://www.readbyqxmd.com/read/27812371/combined-operando-x-ray-diffraction-raman-spectroscopy-of-catalytic-solids-in-the-laboratory-the-co-tio2-fischer-tropsch-synthesis-catalyst-showcase
#19
Korneel H Cats, Bert M Weckhuysen
A novel laboratory setup for combined operando X-ray diffraction and Raman spectroscopy of catalytic solids with online product analysis by gas chromatography is presented. The setup can be used with a laboratory-based X-ray source, which results in important advantages in terms of time-on-stream that can be measured, compared to synchrotron-based experiments. The data quality was much improved by the use of a relatively high-energy MoKα radiation instead of the more conventional CuKα radiation. We have applied the instrument to study the long-term deactivation of Co/TiO2 Fischer-Tropsch synthesis (FTS) catalysts...
April 20, 2016: ChemCatChem
https://www.readbyqxmd.com/read/27796088/glycerol-dehydration-to-acrolein-catalyzed-by-zsm-5-zeolite-in-supercritical-carbon-dioxide-medium
#20
Bin Zou, Shoujie Ren, X Philip Ye
Supercritical carbon dioxide (SC-CO2 ) has been used for the first time as a reaction medium for the dehydration of glycerol to acrolein catalyzed by a solid acid. Unprecedented catalyst stability over 528 hours of time-on-stream was achieved and the rate of coke deposition on the zeolite catalyst was the lowest among extensive previous studies, showing potential for industrial application. Coking pathways in SC-CO2 were also elucidated for future development. The results have potential implications for other dehydration reactions catalyzed by solid acids...
October 31, 2016: ChemSusChem
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