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https://www.readbyqxmd.com/read/29144878/effect-of-preparation-designs-on-the-prognosis-of-porcelain-laminate-veneers-a-systematic-review-and-meta-analysis
#1
N Hong, H Yang, J Li, S Wu, Y Li
OBJECTIVE: To investigate the association between preparation designs and prognosis of porcelain laminate veneers (PLVs). METHODS: Electronic and manual literature searches were performed in Medline, Embase, CENTRAL, and Scopus databases for randomized controlled trials and retrospective and prospective cohort studies comparing any two of three preparation designs. The quality of the included studies was assessed using the Newcastle-Ottawa scale. Pooled hazard ratios and risk ratios were used to evaluate the difference between two preparation designs...
November 2017: Operative Dentistry
https://www.readbyqxmd.com/read/29144296/dynamic-desorption-of-arsenic-from-polymer-supported-hydrated-iron-iii-oxide-in-a-wastewater-treatment-plant
#2
Jian-Long Hu, Xiao-Song Yang, Ting Liu, Li-Nan Shao, Wang Zhang
Polymer-supported hydrated iron(III) oxide (PHIO) was successfully applied as adsorbent for arsenic removal in a wastewater treatment plant in Nandan, China. The practical PHIO adsorbent samples (PHIO-P) were collected from the adsorption column of the wastewater treatment plant, and desorption experiments of the adsorbent were carried out. Our results showed that the formation of precipitates on the surface of PHIO-P might block the porous channel of the adsorbent and decrease its arsenic adsorption capacity...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29144170/night-work-as-a-risk-factor-for-future-cause-specific-disability-pension-a-prospective-twin-cohort-study-in-sweden
#3
Annina Ropponen, Jurgita Narusyte, Lisa Mather, Ellenor Mittendorfer-Rutz, Torbjörn Åkerstedt, Pia Svedberg
The objectives of the study were to investigate the associations between night work and disability pension (DP) due to all causes, cardiovascular (CVD), mental, and other diagnoses, adjusting for familial confounding. The material of the study included comprehensive survey data on 27 165 Swedish twins born in 1935-1958 that were linked with DP data for the survey period (1998-2003) to 2013. Night work was assessed as years of working nights at least every now and then, and categorized into not at all, 1-10 years and over 10 years...
November 16, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29140634/combustibility-determination-for-cotton-gin-dust-and-almond-huller-dust
#4
Sidney E Hughs, Phillip J Wakelyn
It has been documented that some dusts generated while processing agricultural products, such as grain and sugar, can constitute combustible dust hazards. After a catastrophic dust explosion in a sugar refinery in 2008, the Occupational Safety and Health Administration (OSHA) initiated action to develop a mandatory standard to comprehensively address the fire and explosion hazards of combustible dusts. Cotton fiber and related materials from cotton ginning, in loose form, can support smoldering combustion if ignited by an outside source...
April 26, 2017: Journal of Agricultural Safety and Health
https://www.readbyqxmd.com/read/29139609/development-of-a-high-throughput-method-based-on-thin-film-microextraction-using-a-96-well-plate-system-with-a-cork-coating-for-the-extraction-of-emerging-contaminants-in-river-water-samples
#5
Lucas Morés, Adriana Neves Dias, Eduardo Carasek
In this study, a new method was developed in which a biosorbent material is used as the extractor phase in conjunction with a recently described sample preparation technique called thin-film microextraction and a 96-well plate system. The method was applied to the determination of emerging contaminants, such as 3-(4-methylbenzylidene) camphor, ethylparaben, triclocarban and bisphenol A, in water samples. The separation and detection of the analytes were performed by high-performance liquid chromatography with diode array detection...
November 15, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/29137831/monitour-tracking-global-routes-of-electronic-waste
#6
David Lee, Dietmar Offenhuber, Fábio Duarte, Assaf Biderman, Carlo Ratti
Many nations seek to control or prevent the inflow of waste electronic and electrical equipment, but such flows are difficult to track due to undocumented, often illegal global trade in e-waste. We apply wireless GPS location trackers to this problem, detecting potential cases of non-compliant recycling operations in the United States as well as the global trajectories of exported e-waste. By planting hidden trackers inside discarded computer monitors and printers, we tracked dozens of devices being sent overseas to various ports in Asia, flows likely unreported in official trade data...
November 11, 2017: Waste Management
https://www.readbyqxmd.com/read/29134520/benchmarking-the-scientific-research-on-wastewater-energy-nexus-by-using-bibliometric-analysis
#7
Tianlong Zheng, Pengyu Li, Zhining Shi, Jianguo Liu
With an exponential increase in urbanization and industrialization, water pollution is an inevitable consequence of relatively lagging wastewater treatment facilities. The conventional activated sludge process for wastewater treatment primarily emphasizes the removal of harmful substances to maintain increasingly stringent effluent discharged standards, which is considered an energy-intensive technique. Therefore, innovative and sustainable wastewater treatment should pay more attention to energy and resource recovery in dealing with fossil fuel depletion, global-scale energy security, and climate change...
November 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29132104/hollow-polydopamine-colloidal-composite-particles-structure-tuning-functionalization-and-applications
#8
Yanbing Wang, Bin Shang, Miao Liu, Feng Shi, Bo Peng, Ziwei Deng
Engineering hollow particles with high complexity in their morphology or composition is highly desirable for both fundamental studies and practical applications. Here, we combine mussel-inspired polydopamine (PDA) chemistry with template-assisted and hydrothermal approaches to explore a general approach for engineering hollow PDA colloidal composite particles with tunable complexities in terms of particle geometry, shell architecture and chemical composition. PDA coating and hydrothermal treatment are carried out sequentially in the same environment, which not only simplifies the experimental procedure but also avoids the use of hazardous core-removers...
October 27, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29126025/metallurgical-residues-reused-as-filler-after-35years-and-their-natural-weathering-implications-in-a-mountain-area
#9
Leticia Gómez-Nubla, Julene Aramendia, Silvia Fdez-Ortiz de Vallejuelo, Juan Manuel Madariaga
The natural weathering of EAF (Electric Arc Furnace) and LF (Ladle Furnace) steel slag was evaluated through changes in the mineralogical and elemental composition. For that purpose, black steel slag and mixture of black and white steel slag were collected from two forest tracks, where they had been used as filler 19 and 35years ago respectively in a protected mountain area. Primary/original and secondary/degradation compounds were identified by spectroscopic techniques (Raman Spectroscopy, X-Ray Diffraction (XRD) and Scanning Electron Microscopy/Energy Dispersive X-Ray Spectroscopy (SEM/EDS))...
November 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29124901/raccoon-roundworm-baylisascaris-procyonis-as-an-occupational-hazard-1-knowledge-of-b-%C3%A2-procyonis-and-attitudes-towards-it-and-other-zoonoses-among-wildlife-rehabilitators
#10
S G H Sapp, B A Murray, E R Hoover, G T Green, M J Yabsley
Wildlife rehabilitators are at risk of zoonotic diseases because they often have prolonged contact with many species of wildlife and their bodily fluids. Raccoon roundworm (Baylisascaris procyonis) is a common zoonotic parasite of raccoons that has the potential to cause severe or fatal neurologic disease in a broad variety of hosts if the eggs within raccoon faeces are ingested. We administered an online survey to wildlife rehabilitators to assess their knowledge regarding aspects of transmission, biology and disease caused by B...
November 10, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/29123939/assessment-of-availability-and-human-health-risk-posed-by-arsenic-contaminated-well-waters-from-timis-bega-area-romania
#11
Marin Senila, Erika Levei, Oana Cadar, Lacrimioara Ramona Senila, Marius Roman, Ferenc Puskas, Mihaela Sima
Mobilization of As from geological materials into ground and drinking water sources may represent an important threat to human health. The objective of this study was to assess the As concentration and availability in underground water used as drinking water sources. Water samples were collected from public and private wells in Timis-Bega area of Pannonian Basin, West Romania. Total-dissolved As measured after "classical" filtration of water samples was in the range of 0.10-168 μg L(-1), thus exceeding the guideline value in majority of the samples...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29123668/nanoehs-beyond-toxicity-focusing-on-biocorona
#12
Sijie Lin, Monika Mortimer, Ran Chen, Aleksandr Kakinen, Jim E Riviere, Thomas P Davis, Feng Ding, Pu Chun Ke
The first phase of environmental health and safety of nanomaterials (nanoEHS) studies has been mainly focused on evidence-based investigations that probe the impact of nanoparticles, nanomaterials and nano-enabled products on biological and ecological systems. The integration of multiple disciplines, including colloidal science, nanomaterial science, chemistry, toxicology/immunology and environmental science, is necessary to understand the implications of nanotechnology for both human health and the environment...
July 1, 2017: Environmental Science. Nano
https://www.readbyqxmd.com/read/29123548/the-hazard-content-of-cadmium-lead-and-other-trace-elements-in-some-medicinal-herbs-and-their-water-infusions
#13
Fuad A Ababneh
54 samples belonging to 23 herbal species (15 individuals and 8 mixtures) were analyzed for their contents of heavy metals in the raw materials and in their water infusions. Trace and toxic elements in these samples were determined by using inductively coupled plasma-atomic emission spectrometry (ICP-OES) following acid digestion. The order of decreasing mean metal concentrations in raw materials (mg/kg) was found to be as follows: Fe (440) > Mn (162) > Zn (45.8) > Cu (12) > Pb (10.4) > Ni (5...
2017: International Journal of Analytical Chemistry
https://www.readbyqxmd.com/read/29121599/polyaniline-pani-an-innovative-support-for-sampling-and-removal-of-vocs-in-air-matrices
#14
Cristina Della Pina, Maria Antonietta De Gregorio, Laura Clerici, Pierluisa Dellavedova, Ermelinda Falletta
Polyaniline (PANI)-based materials for both removal and sampling of volatile organic compounds (VOCs) from air by rapid adsorption/desorption processes have been developed. The polymer was synthesized in form of emeraldine as both salt and base using different synthetic approaches, a traditional one and a "green" one. VOCs adsorption/desorption efficiency was evaluated for all the materials analyzing the desorbed VOCs fractions by GC/MS technique and obtaining results similar to the presently adopted method employing commercial activated carbon...
October 12, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29121563/benthic-invertebrate-exposure-and-chronic-toxicity-risk-analysis-for-cyclic-volatile-methylsiloxanes-comparison-of-hazard-quotient-and-probabilistic-risk-assessment-approaches
#15
Kent B Woodburn, Rita M Seston, Jaeshin Kim, David E Powell
This study utilized probabilistic risk assessment techniques to compare field sediment concentrations of the cyclic volatile methylsiloxane (cVMS) materials octamethylcyclotetrasiloxane (D4, CAS # 556-67-2), decamethylcyclopentasiloxane (D5, CAS # 541-02-6), and dodecamethylcyclohexasiloxane (D6, CAS # 540-97-6) to effect levels for these compounds determined in laboratory chronic toxicity tests with benthic organisms. The concentration data for D4/D5/D6 in sediment were individually sorted and the 95th centile concentrations determined in sediment on an organic carbon (OC) fugacity basis...
October 28, 2017: Chemosphere
https://www.readbyqxmd.com/read/29117841/metallic-mercury-injection-in-the-hand-caused-by-a-broken-mercury-thermometer-a-case-report
#16
Dongmin Kim, Jong Woong Park
Incorrect usage of or accidents related to metallic mercury can be hazardous. Herein, we present a case of subcutaneous metallic mercury injection in the hand caused by a broken thermometer and surgical tips for this injury. A 43-year-old female patient visited our hospital due to mercurial injection injury at the left hand suffered 4 weeks previously. On gross findings, the mercury deposition was limited to the subcutaneous layer and enveloped by granulation tissue. The blood mercury level, which had been abnormally elevated, fortunately decreased to within normal levels within five months...
December 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/29117109/lignin-modified-carbon-nanotube-graphene-hybrid-coating-as-efficient-flame-retardant
#17
Kunlin Song, Indroneil Ganguly, Ivan Eastin, Anthony B Dichiara
To reduce fire hazards and expand high-value applications of lignocellulosic materials, thin films comprising graphene nanoplatelets (GnPs) and multi-wall carbon nanotubes (CNTs) pre-adsorbed with alkali lignin were deposited by a Meyer rod process. Lightweight and highly flexible papers with increased gas impermeability were obtained by coating a protective layer of carbon nanomaterials in a randomly oriented and overlapped network structure. Assessment of the thermal and flammability properties of papers containing as low as 4 wt % carbon nanomaterials exhibited self-extinguishing behavior and yielded up to 83...
November 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29103654/equilibrium-sampling-informs-tissue-residue-and-sediment-remediation-for-pyrethroid-insecticides-in-mariculture-a-laboratory-demonstration
#18
Juan-Ying Li, Wenxuan Shi, Zhenhua Li, Yiqin Chen, Liu Shao, Ling Jin
Mariculture product safety in relation to sediment quality has attracted increasing attention because of the accumulation of potentially hazardous chemicals, including pyrethroid insecticides, in sediment. Passive sampling has been widely used to assess the bioavailability of sediment-associated hydrophobic organic contaminants and predict their body residue in benthic organisms. Therefore, in this study, we introduced polydimethylsiloxane (PDMS) polymer as a biomimetic "chemometer" for freely-dissolved concentrations (Cfree) to assess the efficacy of different carbon sorbents in reducing the bioavailability of pyrethroids in the process of sediment remediation...
November 2, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29102880/direct-and-potential-risk-assessment-of-exposure-to-volatile-organic-compounds-for-primary-receptor-associated-with-solvent-consumption
#19
Di Wang, Han Yu, Xia Shao, Hongbing Yu, Lei Nie
Rapid development of industrial production has stimulated the growth of consumption of raw and auxiliary materials including organic paints, among which volatile organic compounds (VOCs) are proved harmful to the population who inhale the polluted air based on epidemiologic studies. Therefore, new types of environment-friendly paints were developed to replace solvent-based paints (SBPs). Nevertheless, new types of paints containing VOCs failed to replace SBPs entirely due to certain disadvantages. Hence, five kinds of paints were employed in simulation experiments to assess the health risk of primary receptor including three kinds of water-based paints (WBPs) and two kinds of SBPs...
November 2, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29097396/choice-of-implant-combinations-in-total-hip-replacement-systematic-review-and-network-meta-analysis
#20
REVIEW
José A López-López, Rachel L Humphriss, Andrew D Beswick, Howard H Z Thom, Linda P Hunt, Amanda Burston, Christopher G Fawsitt, William Hollingworth, Julian P T Higgins, Nicky J Welton, Ashley W Blom, Elsa M R Marques
Objective To compare the survival of different implant combinations for primary total hip replacement (THR). Design Systematic review and network meta-analysis. Data sources Medline, Embase, The Cochrane Library, ClinicalTrials.gov, WHO International Clinical Trials Registry Platform, and the EU Clinical Trials Register.Review methods Published randomised controlled trials comparing different implant combinations. Implant combinations were defined by bearing surface materials (metal-on-polyethylene, ceramic-on-polyethylene, ceramic-on-ceramic, or metal-on-metal), head size (large ≥36 mm or small <36 mm), and fixation technique (cemented, uncemented, hybrid, or reverse hybrid)...
November 2, 2017: BMJ: British Medical Journal
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