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https://www.readbyqxmd.com/read/29034721/biological-monitoring-of-exposure-to-low-concentrations-of-benzene-in-workers-at-a-metallurgical-coke-production-plant-new-insights-into-s-phenylmercapturic-acid-and-urinary-benzene
#1
Piero Lovreglio, Giuseppe De Palma, Anna Barbieri, Roberta Andreoli, Ignazio Drago, Luciano Greco, Elisabetta Gallo, Laura Diomede, Pietro Scaramuzzo, Maria Cristina Ricossa, Jacopo Fostinelli, Pietro Apostoli, Leonardo Soleo
CONTEXT: Urinary S-phenylmercapturic acid (SPMA) and benzene (U-Ben) are usually measured at the end of the work shift (ES), although their kinetic of elimination is not clearly known. OBJECTIVE: To investigate SPMA and U-Ben elimination 16 h after the ES, in 93 coke production workers exposed to low benzene concentrations. MATERIALS AND METHODS: Airborne benzene (A-Ben) was measured by passive samplings, while SPMA, U-Ben, methyl-tert-butyl ether (U-MTBE), cotinine (U-Cot) and creatinine were determined on urine samples collected at ES and before the beginning of the next work shift (next BS)...
October 16, 2017: Biomarkers: Biochemical Indicators of Exposure, Response, and Susceptibility to Chemicals
https://www.readbyqxmd.com/read/29031116/evaluation-of-fluoride-bioremediation-and-production-of-biomolecules-by-living-cyanobacteria-under-fluoride-stress-condition
#2
Gargi Biswas, Sohini Guha Thakurta, Jitamanyu Chakrabarty, Kalyan Adhikari, Susmita Dutta
Application of microalgae for defluoridation has gained interest in recent years. In the present study, bioremediation of fluoride using living cyanobacteria, Starria zimbabweensis, collected from wastewater of coke-oven effluent treatment plant, Durgapur, India, has been investigated. Initially, the cyanobacterial strain was grown in BG11 medium at 25°C, 45μmol/m(2)/s irradiation in 18h: 6h light:dark cycle in an algal incubator. Samples were withdrawn after 2 days interval and analyzed for its dry biomass and lipid content...
October 11, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28991868/type-2-diabetes-in-the-older-adult-the-need-for-assessment-of-frailty
#3
Lola A Coke, Cheryl R Dennison Himmelfarb
No abstract text is available yet for this article.
November 2017: Journal of Cardiovascular Nursing
https://www.readbyqxmd.com/read/28984570/parapedobacter-defluvii-sp-nov-isolated-from-the-sewage-treatment-packing-of-a-coking-chemical-plant
#4
Lan Yang, Yun-Hao Wang, Hai-Zhen Zhu, Jiang-Baota Muhadesi, Bao-Jun Wang, Shuang-Jiang Liu, Cheng-Ying Jiang
Strain WY-1(T), a Gram-stain-negative, non-spore-forming, rod-shaped, non-motile bacterium, was isolated from the sewage treatment packing of a coking chemical plant. Strain WY-1(T) grew over a temperature range of 15-45 °C (optimum, 30-37 °C), a pH range of 5.5-11.0 (optimum, pH 6.5-7.0) and an NaCl concentration range of 0-3 % (w/v; optimum, 0 %). 16S rRNA gene sequence analysis showed that strain WY-1(T)was closely related to Parapedobacter indicus RK1(T) with the highest sequence similarity of 96...
October 6, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28958662/simultaneous-biodegradation-of-phenol-and-cyanide-present-in-coke-oven-effluent-using-immobilized-pseudomonas-putida-and-pseudomonas-stutzeri
#5
Utkarsh Singh, Naveen Kumar Arora, Preeti Sachan
Discharge of coke-oven wastewater to the environment may cause severe contamination to it and also threaten the flora and fauna, including human beings. Hence before dumping it is necessary to treat this dangerous effluent in order to minimize the damage to the environment. Conventional technologies have inherent drawbacks however, biological treatment is an advantageous alternative method. In the present study, bacteria were isolated from the soil collected from the sites contaminated by coke-oven effluent rich in phenol and cyanide...
September 4, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28946386/assessment-of-derelict-soil-quality-abiotic-biotic-and-functional-approaches
#6
Quentin Vincent, Apolline Auclerc, Thierry Beguiristain, Corinne Leyval
The intensification and subsequent closing down of industrial activities during the last century has left behind large surfaces of derelict lands. Derelict soils have low fertility, can be contaminated, and many of them remain unused. However, with the increasing demand of soil surfaces, they might be considered as a resource, for example for non-food biomass production. The study of their physico-chemical properties and of their biodiversity and biological activity may provide indications for their potential re-use...
September 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28921046/competition-for-electrons-between-pyridine-and-quinoline-during-their-simultaneous-biodegradation
#7
Hua Xu, Weihua Sun, Ning Yan, Danni Li, Xueqi Wang, Tingting Yu, Yongming Zhang, Bruce E Rittmann
Biodegradation of pyridine and quinoline is initiated with mono-oxygenation reactions that require an intracellular electron donor. Simultaneous biodegradation of both substrates should set up competition for the intracellular electron donor that may inhibit one or more of the mono-oxygenation steps. An internal circulation baffled biofilm reactor (ICBBR) was used to evaluate the impacts of competition during pyridine and quinoline biodegradation. Compared with independent biodegradation, pyridine and quinoline removal rates were slowed when biodegraded simultaneously, although the pyridine removal rate decreased more than for quinoline...
September 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28919474/highly-efficient-one-step-advanced-treatment-of-biologically-pretreated-coking-wastewater-by-an-integration-of-coagulation-and-adsorption-process
#8
Jie Li, Xiao Yuan, Huangpu Zhao, Fengting Li, Zhongfang Lei, Zhenya Zhang
A novel integrated process of coagulation and adsorption was proposed for the advanced treatment of biologically pretreated coking wastewater. Results of laboratory, pilot, and industrial-scale experiments indicated that this one-step novel process can remove biorefractory pollutants, achieving the maximum chemical oxygen demand (COD) and cyanide removals of around 85.3% and 99.4%, respectively. Its effluent could meet the corresponding discharge standards without any further treatment, i.e., COD <30mg/L, cyanide <0...
September 6, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28918061/improved-fuzzy-pid-controller-design-using-predictive-functional-control-structure
#9
Yuzhong Wang, Qibing Jin, Ridong Zhang
In conventional PID scheme, the ensemble control performance may be unsatisfactory due to limited degrees of freedom under various kinds of uncertainty. To overcome this disadvantage, a novel PID control method that inherits the advantages of fuzzy PID control and the predictive functional control (PFC) is presented and further verified on the temperature model of a coke furnace. Based on the framework of PFC, the prediction of the future process behavior is first obtained using the current process input signal...
September 13, 2017: ISA Transactions
https://www.readbyqxmd.com/read/28915728/atomic-level-simulation-study-of-n-hexane-pyrolysis-on-silicon-carbide-surfaces
#10
Md Symon Jahan Sajib, Mohammadreza Samieegohar, Tao Wei, Katherine Shing
Ethylene production plays a key role in the petrochemical industry. The severe operation conditions of ethylene thermal cracking, such as high-temperature and coke-formation, pose challenges for the development of new corrosion-resistant and coking-resistant materials for ethylene reactor radiant coils tubes (RCTs). We investigated the performance of ceramic materials such as silicon carbide (SiC) in severe pyrolysis conditions by using reactive forcefield molecular dynamics (ReaxFF MD) simulation method. Our results indicate that β-SiC surface remains fully stable at 1500 K, whereas increased temperature results in melted interface...
September 15, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28913690/natural-manganese-ore-catalyst-for-low-temperature-selective-catalytic-reduction-of-no-with-nh3-in-coke-oven-flue-gas
#11
Baozhong Zhu, Shoulai Yin, Yunlan Sun, Zicheng Zhu, Jiaxin Li
Different types of manganese ore raw materials were prepared for use as catalysts, and the effects of different manganese ore raw materials and calcination temperature on the NO conversion were analyzed. The catalysts were characterized by XRF, XRD, BET, XPS, H2-TPR, NH3-TPD, and SEM techniques. The results showed that the NO conversion of calcined manganese ore with a Mn:Fe:Al:Si ratio of 1.51:1.26:0.34:1 at 450 °C reached 80% at 120 °C and 98% at 180~240 °C. The suitable proportions and better dispersibility of active ingredients, larger BET surface area, good reductibility, a lot of acid sites, contents of Mn(4+) and Fe(3+), and surface-adsorbed oxygen played important roles in improving the NO conversion...
September 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28898834/cometabolic-degradation-of-low-strength-coking-wastewater-and-the-bacterial-community-revealed-by-high-throughput-sequencing
#12
Jia Zhou, Haisong Li, Xiaolei Chen, Dongjin Wan, Wenning Mai, Changqing Sun
Cometabolism technology was employed to degrade low-strength coking wastewater (CWW) in Sequencing Batch Reactor (SBR). The bacterial community compositions were monitored by high-throughput sequencing. Cometabolic substrate effectively improved the chemical oxygen demand (COD) removal efficiency in glucose-added system (A1) compared to glucose-free system (A0). Meanwhile, A1 exhibited larger biomass, better settlement performance, and higher dehydrogenase activity (DHA). More importantly, high-throughput sequencing revealed that dominant populations in A1 were quite different with A0...
August 31, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28895018/promotional-effect-of-rare-earth-doped-manganese-oxides-supported-on-activated-semi-coke-for-selective-catalytic-reduction-of-no-with-nh3
#13
Zheng Yan, Yanxin Qu, Lili Liu, Xinlei Ge, Jiayao Yang, Lihong Wei, Tianhua Yang, Xidong Wang
A composite catalyst for the selective catalytic reduction (SCR) of NOx with NH3 is investigated, in which the rare earth (RE, including La, Ce, Pr, and Nd) is doped into manganese oxides supported on activated semi-coke (MnOx/ASC) via hydrothermal method at the molar ratio of Mn:RE = 1:5. It is evidenced that the addition of RE at a rather low molar ratio can enhance the catalytic activity of MnOx/ASC. The catalyst with a Mn:Ce molar ratio of 10:1 yields an over 90% NOx removal efficiency in the temperature range of 150-250 °C...
September 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28894113/microwaves-effectively-examine-the-extent-and-type-of-coking-over-acid-zeolite-catalysts
#14
B Liu, D R Slocombe, J Wang, A Aldawsari, S Gonzalez-Cortes, J Arden, V L Kuznetsov, H AlMegren, M AlKinany, T Xiao, P P Edwards
Coking leads to the deactivation of solid acid catalyst. This phenomenon is a ubiquitous problem in the modern petrochemical and energy transformation industries. Here, we show a method based on microwave cavity perturbation analysis for an effective examination of both the amount and the chemical composition of cokes formed over acid zeolite catalysts. The employed microwave cavity can rapidly and non-intrusively measure the catalytically coked zeolites with sample full body penetration. The overall coke amount is reflected by the obtained dielectric loss (ε″) value, where different coke compositions lead to dramatically different absorption efficiencies (ε″/cokes' wt%)...
September 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/28884617/strengths-and-gaps-in-physicians-risk-communication-a-scenario-study-of-the-influence-of-numeracy-on-cancer-screening-communication
#15
Dafina Petrova, Olga Kostopoulou, Brendan C Delaney, Edward T Cokely, Rocio Garcia-Retamero
OBJECTIVE: Many patients have low numeracy, which impedes their understanding of important information about health (e.g., benefits and harms of screening). We investigated whether physicians adapt their risk communication to accommodate the needs of patients with low numeracy, and how physicians' own numeracy influences their understanding and communication of screening statistics. METHODS: UK family physicians ( N = 151) read a description of a patient seeking advice on cancer screening...
September 1, 2017: Medical Decision Making: An International Journal of the Society for Medical Decision Making
https://www.readbyqxmd.com/read/28837339/environmental-benefit-assessment-for-the-carbonation-process-of-petroleum-coke-fly-ash-in-a-rotating-packed-bed
#16
Si-Lu Pei, Shu-Yuan Pan, Ye-Mei Li, Pen-Chi Chiang
A high-gravity carbonation process was deployed at a petrochemical plant using petroleum coke fly ash and blowdown wastewater to simultaneously mineralized CO2 and remove nitrogen oxides and particulate matters from the flue gas. With a high-gravity carbonation process, the CO2 removal efficiency was found to be 95.6%, corresponding to a capture capacity of 600 kg CO2 per day, at a gas flow rate of 1.47 m(3)/min under ambient temperature and pressure. Moreover, the removal efficiency of nitrogen oxides and particulate matters was 99...
September 6, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28837311/boron-doped-graphite-for-high-work-function-carbon-electrode-in-printable-hole-conductor-free-mesoscopic-perovskite-solar-cells
#17
Miao Duan, Chengbo Tian, Yue Hu, Anyi Mei, Yaoguang Rong, Yuli Xiong, Mi Xu, Yusong Sheng, Pei Jiang, Xiaomeng Hou, Xiaotong Zhu, Fei Qin, Hongwei Han
Work function of carbon electrodes is critical in obtaining high open-circuit voltage as well as high device performance for carbon-based perovskite solar cells. Herein, we propose a novel strategy to upshift work function of carbon electrode by incorporating boron atom into graphite lattice and employ it in printable hole-conductor-free mesoscopic perovskite solar cells. The high-work-function boron-doped carbon electrode facilitates hole extraction from perovskite as verified by photoluminescence. Meanwhile, the carbon electrode is endowed with an improved conductivity because of a higher graphitization carbon of boron-doped graphite...
September 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28837180/gallium-rich-pd-ga-phases-as-supported-liquid-metal-catalysts
#18
N Taccardi, M Grabau, J Debuschewitz, M Distaso, M Brandl, R Hock, F Maier, C Papp, J Erhard, C Neiss, W Peukert, A Görling, H-P Steinrück, P Wasserscheid
A strategy to develop improved catalysts is to create systems that merge the advantages of heterogeneous and molecular catalysis. One such system involves supported liquid-phase catalysts, which feature a molecularly defined, catalytically active liquid film/droplet layer adsorbed on a porous solid support. In the past decade, this concept has also been extended to supported ionic liquid-phase catalysts. Here we develop this idea further and describe supported catalytically active liquid metal solutions (SCALMS)...
September 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28834835/esophageal-stricture-in-a-child-with-habit-of-acidic-drinks
#19
Omer Erdur, Tamer Sekmenli, Ilhan Ciftci, Kayhan Ozturk
A 12-year-old boy with Down syndrome referred to the authors' department with dysphagia and growth retardation. Dysphagia was especially with solid foods and had a 12-month history. When he was 7, he had started to drink Coke and from that time he had a Coke drinking habit. Every day he was drinking more than 2 L Coke and was eating meals in small amounts. Investigations of the patient revealed esophageal stricture related to acidic drink habit and gastro-oesephageal reflux. The patient was treated with recurrent bouginage, antireflux medication, and nutrional support...
October 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28822284/the-comparison-of-chemical-liquid-deposition-and-acid-dealumination-modified-zsm-5-for-catalytic-pyrolysis-of-pinewood-using-pyrolysis-gas-chromatography-mass-spectrometry
#20
Huiyan Zhang, Shanshan Shao, Mengmeng Luo, Rui Xiao
Catalyst deactivation is the main reason for low petrochemical yield in catalytic fast pyrolysis (CFP) of biomass. ZSM-5 catalysts modified by chemical liquid deposition (CLD) and acid dealumination (AD) were prepared to improve petrochemical yields for CFP of pinewood. The results showed that CLD by SiO2 led to the coverage of strong acid sites, while AD favored the removal of superficial acid sites. CFP of pinewood showed that the relative area ratio of BTX was boosted by 37.2% and 30.4% over modified ZSM-5 catalysts by CLD and AD, respectively...
November 2017: Bioresource Technology
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