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Journal of Occupational and Environmental Hygiene

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https://www.readbyqxmd.com/read/28841385/characterization-of-wood-dust-emission-from-hand-held-woodworking-machines
#1
F-X Keller, F Chata
This paper focuses on the prevention of exposure to wood dust when operating electrical hand-held sawing and sanding machines. A laboratory methodology was developed to measure the dust concentration around machines during operating processes. The main objective was to characterize circular saws and sanders, with the aim of classifying the different power tools tested in terms of dust emission (high dust emitter versus low dust emitter). A test set-up was developed and is described and a measurement methodology was determined for each of the two operations studied...
August 25, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28837406/evaluation-of-waste-isoflurane-gas-exposure-during-rodent-surgery-in-an-australian-university
#2
Kelly R Johnstone, Cora Lau, Jane L Whitelaw
Biomedical researchers use of inhalational anesthetics has increased in recent years. Use of isoflurane as an inhalational anesthetic may result in human exposure to waste anesthetic gas. Potential health effects from exposure include genotoxic and hepatotoxic effects with some evidence of teratogenic and reproductive effects. Research suggests that exposure to waste anesthetic gas within human hospital settings has improved substantially but exposures to biomedical researchers and veterinarians still requires improvement...
August 24, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28825893/risk-assessments-using-the-strain-index-and-the-tlv-for-hal-part-i-task-and-multi-task-job-exposure-classifications
#3
Jay M Kapellusch, Stephen S Bao, Barbara A Silverstein, Andrew S Merryweather, Mathew S Thiese, Kurt T Hegmann, Arun Garg
BACKGROUND: The Strain Index (SI) and the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value for Hand Activity Level (TLV for HAL) use different constituent variables to quantify task physical exposures. Similarly, time-weighted-average (TWA), Peak, and Typical exposure techniques to quantify physical exposure from multi-task jobs make different assumptions about each task's contribution to the whole job exposure. Thus, task and job physical exposure classifications differ depending upon which model and technique are used for quantification...
August 21, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28825873/an-intelligent-ffr-with-a-self-adjustable-ventilation-fan
#4
Song Zhou, Hui Li, Shengnan Shen, Siyu Li, Wei Wang, Xiaotie Zhang, James Yang
This paper presents an intelligent Filtering Facepiece Respirator (FFR) with a self-adjustable ventilation fan for improved comfort. The ventilation fan with an intelligent control aims to reduce temperature, relative humidity, and CO2 concentrations inside the facepiece. Compared with a previous version of the FFR, the advantage of this new FFR is the intelligent control of the fan's rotation speed based on the change in temperature and relative humidity in the FFR deadspace. The design of the control system utilizes an 8-bit, ultra-low power STC15W404AS microcontroller (HongJin technology, Shenzhen, China), and adopts a high-precision AM2320 device (AoSong electronic, Guangzhou, China) as temperature and relative humidity sensor so that control of temperature and relative humidity is realized in real time within the FFR deadspace...
August 21, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28825871/resistance-of-type-5-chemical-protective-clothing-against-nanometric-airborne-particles-behaviour-of-seams-and-zipper
#5
Ludwig Vinches, Stéphane Hallé
In the field of dermal protection, the use of chemical protective clothing (CPC) (including coveralls) are considered as the last barrier against airborne engineered nanomaterials (ENM). In the majority of cases, type 5 CPC, used against solid particles (ISO 13982-1), perform well against ENM. But in a recent study, a penetration level (PL) of up to 8.5% of polydisperse sodium chloride airborne nanoparticles has been measured. Moreover, in all the previous studies, tests were performed on a sample of protective clothing material without seams or zippers...
August 21, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28825865/the-physiological-strain-incurred-during-electrical-utilities-work-over-consecutive-work-shifts-in-hot-environments-a-case-report
#6
Robert D Meade, Andrew W D'Souza, Lovely Krishen, Glen P Kenny
PURPOSE: In this case report, we evaluated physiological strain in electrical utilities workers during consecutive work shifts in hot outdoor conditions. METHODS: Four highly experienced electrical utilities workers were monitored during regularly scheduled work performed in hot conditions (∼34˚C) on two consecutive days. Worker hydration (urine specific gravity) was assessed prior to and following work. The level of physical exertion was determined by video analysis...
August 21, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28777734/-the-action-level-%C3%A2
#7
(no author information available yet)
No abstract text is available yet for this article.
August 4, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28777731/-the-action-level-%C3%A2
#8
(no author information available yet)
No abstract text is available yet for this article.
August 4, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28763291/manikin-based-size-resolved-penetrations-of-ce-marked-filtering-facepiece-respirators
#9
Norbert Serfozo, Jakub Ondráček, Petr Otáhal, Mihalis Lazaridis, Vladimír Ždímal
The purpose of this manikin-based study was to determine the percentage penetrations of 9 CE-marked filtering facepiece respirator models (2 sample from each) from filtering classes FFP1, FFP2, and FFP3 and to demonstrate by an independent measurement method the disadvantages and shortcomings of the currently valid European Norm (EN 149:2001) for filtering facepieces. All of the filtering facepieces were evaluated size-selectively in an experimental chamber using charge-neutralized monodisperse ammonium sulfate in 9 sizes ranging from 20 to 400 nm of count median diameter (CMD) under flowrate of 95 L/min...
August 1, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28763290/powered-air-purifying-respirator-use-in-healthcare-effects-on-thermal-sensations-and-comfort
#10
Jeffrey B Powell, Jung-Hyun Kim, Raymond J Roberge
Twelve subjects wore an N95 filtering facepiece respirator (N95 FFR), one tight-fitting full facepiece powered air-purifying respirator (PAPR), two loose-fitting PAPRs, and one elastomeric/PAPR hybrid for 1 hr each during treadmill walking at 5.6 km/h while undergoing physiological and subjective response monitoring. No significant interaction (p≥.05) was noted between the five respirators in heart rate, respiratory rate, oxygen saturation, transcutaneous carbon dioxide, and perceptions of breathing effort or discomfort, exertion, facial heat, and overall body heat...
August 1, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28763289/improved-hearing-protector-attenuation-through-the-use-of-a-lubricant
#11
Timothy J Ryan, Rebecca S Meier, Ashley Tatarka
A study of 40 novice hearing protection users was conducted to determine if the use of lubricants with hearing protective plugs would enhance their attenuation. Three types of hearing protection devices (i.e., earplugs) were evaluated: roll-down PVC foam, mushroom-style polyurethane foam, and elastomeric flanged. For each earplug type, the right and left ear (dry and lubricated, respectively) personal attenuation rating was determined using a commercially available microphone in real-ear apparatus. Earplug efficacy was observed to increase in the presence of lubricants for all 3 plug types, with average mean elevations by earplug type ranging from 1...
August 1, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28763288/particle-size-distribution-a-key-factor-in-estimating-powder-dustiness
#12
Ana López-Lilao, Forner Vicenta Sanfélix, Gasch Gustavo Mallol, Gimeno Eliseo Monfort
ASTRACT A wide variety of raw materials, involving more than twenty samples of quartzes, feldspars, nephelines, carbonates, dolomites, sands, zircons, and alumina, were selected and characterised. Dustiness, i.e. a materials' tendency to generate dust on handling, was determined using the continuous drop method. These raw materials were selected to encompass a wide range of particle sizes (1.6-294 µm) and true densities (2650-4680 kg/m(3)). The dustiness of the raw materials, i.e. their tendency to generate dust on handling, was determined using the continuous drop method...
August 1, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28763285/respirator-performance-terminology
#13
Larry Janssen, Roy McKay
No abstract text is available yet for this article.
August 1, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28763284/comment-from-the-editor-in-chief-on-the-letter-to-the-editor-from-larry-janssen-and-roy-mckay-representing-the-aiha-respiratory-protection-committee
#14
Mark Nicas
No abstract text is available yet for this article.
August 1, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28699827/evaluation-of-a-passive-method-for-determining-particle-penetration-through-protective-clothing-materials
#15
Peter A Jaques, Lee Portnoff
The risk of workers' exposure to aerosolized particles has increased with the upsurge in the production of engineered nanomaterials. Currently, a whole-body standard test method for measuring particle penetration through protective clothing ensembles is not available. Those available for respirators neglect the most common challenges to ensembles, because they use active vacuum-based filtration, designed to simulate breathing, rather than the positive forces of wind experienced by workers. Thus, a passive method that measures wind-driven particle penetration through ensemble fabric has been developed and evaluated...
July 12, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28692340/salivary-cortisol-and-alpha-amylase-is-there-consistency-between-psychosocial-stress-test-and-burdensome-work-shifts
#16
Kati Karhula, Mikko Härmä, Mikael Sallinen, Harri Lindholm, Ari Hirvonen, Marko Elovainio, Mika Kivimäki, Jussi Vahtera, Sampsa Puttonen
This study examined the consistency of salivary cortisol and alpha-amylase (sAA) total daily secretion between laboratory and field circumstances. The 95 participants were shift working female health care professionals with high (n = 53) or low (n = 42) psychosocial stress (job strain) measured by the Job Content Questionnaire (JCQ). The Trier Social Stress Test including a 5-minute free speech and a mental arithmetic task was conducted with four, and field measurements with three daily saliva samples of cortisol and sAA during circadian rhythm and inter-shift recovery controlled morning shift, night shift, and a day off...
July 10, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28657501/profiles-of-law-enforcement-agency-body-armor-policies-a-latent-class-analysis-of-the-lemas-2013-data
#17
Weiwei Liu, Bruce Taylor
The life-saving benefits of body armor have been well-documented, and law enforcement agency (LEA) body armor wear requirements have been cited by police officers as one of the most important reasons for them to wear body armor. However, research on LEAs' policies and practices regarding body armor is scarce. This study examined whether there are different agency-level profiles of various body armor related policies, and related these body armor policy profiles to agency characteristics, size, location, etc...
June 28, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28650742/evaluating-bioaerosol-exposure-among-bus-drivers-in-the-public-transport-sector
#18
Bożena Nowakowicz-Dębek, Halina Pawlak, Łukasz Wlazło, Piotr Maksym, Jacek Kapica, Anna Chmielowiec-Korzeniowska, Beata Trawińska
Occupational hazards and consequent health problems suffered by drivers in the public transport sector require preventive measures. The aim of this study was to assess the exposure of drivers to microbiological air contamination (airborne bacteria and fungi) in buses. The air in public transport vehicles was examined in autumn, winter and spring. To evaluate the exposure of drivers to bioaerosols, air samples were collected and examined for the total number of bacteria and fungi in the air, the number of mesophilic aerobic bacteria specified by the number of colony forming units (CFU) per 1 m3 of air...
June 26, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28650732/air-hand-wipe-and-surface-wipe-sampling-for-bisphenol-a-bpa-among-workers-in-industries-that-manufacture-and-use-bpa-in-the-united-states
#19
Cynthia J Hines, Matthew V Jackson, Annette L Christianson, John C Clark, James E Arnold, Jack R Pretty, James A Deddens
For decades, bisphenol A (BPA) has been used in making polycarbonate, epoxy, and phenolic resins and certain investment casting waxes, yet published exposure data are lacking for U.S. manufacturing workers. In 2013-2014, BPA air and hand exposures were quantified for 78 workers at six U.S. companies making BPA or BPA-based products. Exposure measures included an inhalable-fraction personal air sample on each of two consecutive work days (n = 146), pre- and end-shift hand wipe samples on the second day (n = 74 each), and surface wipe samples (n = 88)...
June 26, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28650727/models-for-nearly-every-occasion-part-iv-two-box-decreasing-emission-models
#20
Gary H Ganser, Paul Hewett
New two box "well-mixed room" decreasing emission (DE) models are introduced for scenarios that involve local controls, such as some form of local exhaust or local exhaust with filtered return. In addition, these models allow for the recirculation of a filtered (or cleaned) portion of the general room ventilation. For each control device scenario, a steady state and transient near and far field model is presented. The transient equations predict the concentration at time t after the application of the substance...
June 26, 2017: Journal of Occupational and Environmental Hygiene
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