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Neitzel Richard L - - 2006
BACKGROUND: Commercial fishing workers have extended work shifts and potential for 24 hr exposures to high noise. However, exposures in this industry have not been adequately characterized. METHODS: Noise exposures aboard two catcher/processors (C/P) were assessed using dosimetry, sound-level mapping, and self-reported activities and hearing protection device (HPD) use. These ...
McLellan Tom M - - 2006
This report provides a summary of research conducted through a grant provided by the Workplace Safety Insurance Board of Ontario. The research was divided into two phases; first, to define safe work limits for firefighters wearing their protective clothing and working in warm environments; and, the second, to examine strategies ...
Ferrero Alejandro - - 2006
We analyze in detail the apparent violation of the reciprocity law that occurs for an interline CCD array owing to its responsivity that varies with exposure time, and we investigate other parameters having an influence on this variation, such as the numerical aperture of the system or the illumination wavelength. ...
Logvinov S V - - 2006
Light and electron microscopic methods were used to analyze changes in secretory neurons in the supraoptic (SON) and paraventricular (PVN) nuclei in the hypothalamus in 100 adult male rats at time points from the first minutes to 180 days after 48 hours of full-time exposure to bright light. At the ...
Martin Paul R - - 2006
OBJECTIVE: This study investigated how triggers acquire the capacity to precipitate headaches. BACKGROUND: Traditional clinical advice is that the best way to prevent headache/migraine is to avoid the triggers. Avoidance of anxiety-eliciting stimuli, however, results in sensitization to the stimuli, so is there a danger that avoidance of migraine/headache triggers ...
Burch James B - - 2006
Exposure to radio frequency (RF) nonionizing radiation from telecommunications is pervasive in modern society. Elevated disease risks have been observed in some populations exposed to radio and television transmissions, although findings are inconsistent. This study quantified RF exposures among 280 residents living near the broadcasting transmitters for Denver, Colorado. RF ...
Schmuzigert Nicolas - - 2006
We examined the long-term sequelae in both ears of 42 patients who reported the occurrence of auditory changes resulting from a single exposure to intense sound levels during non-occupational activities. We divided these patients into two groups, based upon noise exposures of either continuous duration or single high-energy impulse. Audiometric ...
Alderisio Mauro - - 2006
In this study, quantitative modifications of dust cells, siderocytes, Curschmann's spirals and asbestos bodies and qualitative modifications (cellular changes and inflammatory infiltrate) in the sputum of 164 traffic police officers and 218 railway workers, occupationally exposed to environmental pollution, and the sputum of 119 inhabitants of a rural area, were ...
Duvdevany Amnon - - 2006
Firing noise of small-arms is characterized by a rapid change in pressure and a sharp peak in sound pressure level of 155-170 dB SPL. In the present study, we examined the behavior of transient-evoked otoacoustic emissions (TEOAE) of a group of soldiers exposed initially to the noise of small-arms fire ...
Halsey Kirin K Kresge Hearing Research Institute, Department of Otolaryngology, University of Michigan Medical School, Ann Arbor, MI 48109-0506, - - 2005
Electrically evoked otoacoustic emissions (EEOAEs) are sounds measured in the ear canal when alternating current (AC) stimulation is passed into the cochlea. These sounds are attributed to the motile responses of outer hair cells (OHCs). The EEOAE has characteristic amplitude, phase, and fine structure. Multicomponent analysis of the EEOAE shows ...
Kastak David - - 2005
Behavioral psychophysical techniques were used to evaluate the residual effects of underwater noise on the hearing sensitivity of three pinnipeds: a California sea lion (Zalophus californianus), a harbor seal (Phoca vitulina), and a northern elephant seal (Mirounga angustirostris). Temporary threshold shift (TTS), defined as the difference between auditory thresholds obtained ...
Dacier A - - 2006
Scan behavior in 10 captive predator-naive adult black tufted-ear marmosets (Callithrix penicillata) was investigated prior, during and following brief predator encounters (taxidermized oncilla cat -- Leopardus tigrinus) versus neutral stimulus exposures (stuffed toy). For each stimulus, three 9 min home-cage trials were conducted > or = 72 h apart. Each ...
Finneran James J - - 2005
A behavioral response paradigm was used to measure hearing thresholds in bottlenose dolphins before and after exposure to 3 kHz tones with sound exposure levels (SELs) from 100 to 203 dB re 1 microPa2 s. Experiments were conducted in a relatively quiet pool with ambient noise levels below 55 dB ...
Lawton B W - - 2006
OBJECTIVES: The objective of this study was to review critically a number of occupational investigations of the exposure and effect relation between inhaled styrene vapour and hearing loss. There is concern that workers' hearing may be impaired by exposure to styrene, as used in industries making plastics and fibreglass-reinforced products. ...
Niple John C - - 2005
Exposure to contact current may occur when the body is in contact with two conductive surfaces with different electrical potentials. To date, no published data that describe such exposures or electrical conditions that may predispose to such exposures exist. Our investigation into contact current exposure included (i) a small sample ...
Abbate Carmelo - - 2005
The aim of the study is to investigate how environmental factors, associated with exposure to industrial noise, affect the development of chronic noise-induced hearing loss. The study was conducted on 186 male subjects working in two bottling plants, situated respectively in a small farming community, and in a medium-sized city ...
Müller Marcus - - 2005
The cochlear place-frequency map, determined from noise-damaged mice, is shifted to lower frequencies by up to one octave compared with the map determined from normal hearing mice. To test the hypothesis that the shift results from damage to the cochlear amplifier, we measured frequency tuning curves from the same neurons ...
Ardoino Lucia - - 2005
An exposure system consisting of two long transversal electromagnetic (TEM) cells, operating at a frequency of 900 MHz, is presented and discussed. The set-up allows simultaneous exposure of a significant number of animals (up to 12 mice per cell) in a blind way to a uniform plane wave at a ...
Chapman C Elaine - - 2005
The goal of this study was to address some of the factors that contribute to the human ability to detect the presence of weak electric fields generated by direct current (DC) and alternating current (AC) sources. An exposure chamber allowed us to expose a limited surface of the body (forearm ...
Chen Yuh-Shyang - - 2005
The present study explored the role of endogenous nitric oxide (NO) in the temporary threshold shift caused by acoustic trauma. Guinea pigs were exposed to broadband white noise at a level of 105+/-2dB sound pressure level (SPL) for 10min, causing a temporary threshold shift (TTS). The guinea pigs were divided ...
Seixas N S - - 2005
AIMS: To characterise the development of noise induced damage to hearing. METHODS: Hearing and noise exposure were prospectively monitored among a cohort of newly enrolled construction industry apprentices and a comparison group of graduate students, using standard pure tone audiometry and distortion product otoacoustic emissions (DPOAEs). A total of 328 ...
Redding Gordon M - - 2005
Data and theory from prism adaptation are reviewed for the purpose of identifying control methods in applications of the procedure. Prism exposure evokes three kinds of adaptive or compensatory processes: postural adjustments (visual capture and muscle potentiation), strategic control (including recalibration of target position), and spatial realignment of various sensory-motor ...
Uloziene Ingrida - - 2005
Mobile phones have become indispensable as communication tools; however, to date there is only a limited knowledge about interaction between electromagnetic fields (EMF) emitted by mobile phones and auditory function. The aim of the study was to assess potential changes in hearing function as a consequence of exposure to low-intensity ...
Pouyatos Benoît - - 2005
The diversity of chemical and drugs that can potentiate noise-induced hearing loss (NIHL) has impeded efforts to predict such interactions. We have hypothesized that chemical contaminants that disrupt intrinsic antioxidant defenses hold significant risk for potentiating NIHL. If this is true, then acrylonitrile (ACN) would be expected to potentiate NIHL. ...
Williams Warwick - - 2005
Hearing healthcare professionals often express concern about the possible increased risk of noise injury, and potential for subsequent hearing loss that may result from the rise in the use of personal stereo players (PSP) in the community. Measurements were made of a sample of 55 individuals who were using a ...
Landon Paul - - 2005
BACKGROUND: Both continuous and impact noise exposures of rail yards and railways have been historically understudied. We summarize noise exposures to rail workers at a large chemical facility in North America. METHODS: Rail workers were surveyed over the course of three 12-hr shifts. Personal noise dosimeters were used to derive ...
Crasson Marion - - 2005
The purpose of this study was to reproduce and extend two earlier studies of the effects of human exposure to 50 Hz magnetic fields (MF). In a recent paper, we described results of two double-blind investigations performed to examine effects of 100 microT(rms) 50 Hz MF exposure on psychological parameters ...
Fierro Brigida - - 2005
The aim of the present study was to explore further the effects of light deprivation (LD) on visual cortex excitability. Healthy subjects reporting reliable induction of phosphenes by occipital transcranial magnetic stimulation (TMS) underwent 60 min of complete LD. Phosphene threshold (PT) was measured before (T0), after 45 min (T1) ...
Vouriot Alexandre - - 2005
Exposure to anesthetic gases is known to alter certain structures and functions of the central nervous system. As the effects of long-term exposure on balance control mechanisms have been the subject of few investigations, these were evaluated in 53 operating room personnel exposed to anesthetic gases and in 53 non-exposed ...
Yamasoba Tatsuya - - 2005
This investigation tested the hypothesis that a noise-induced temporary threshold shift (TTS) can be attenuated by a peroxynitrite scavenger, ebselen (2-phenyl-1,2-benzisoselenazol-3(2H)-one). Guinea pigs received an oral dose of the vehicle or 10 mg/kg ebselen 1h before exposure to 115 dB SPL 4-kHz octave band noise for 3 h. In controls, ...
Huber R - - 2005
We investigated the effects of radio frequency electromagnetic fields (RF EMF) similar to those emitted by mobile phones on waking regional cerebral blood flow (rCBF) in 12 healthy young men. Two types of RF EMF exposure were applied: a 'base-station-like' and a 'handset-like' signal. Positron emission tomography scans were taken ...
Rybalko N - - 2005
The effects of intense (110-120 dB) noise exposure (broadband noise for one hour) on temporal resolution was estimated in rats by measuring the behavioural gap detection threshold (GDT). Changes in GDT after 120 dB noise exposure were compared with changes in the threshold and amplitude of middle latency responses (MLR) ...
Ayik Ozer - - 2005
The changes of copper, zinc, iron, magnesium, manganese, and triiodothyronine as a result of short- and long-term isothermal exposure to light were determined in the plasma of mirror carp (Cyprinus carpio). Two groups of fish were subject to a 3-mo treatment that consisted of (1) 8 h of light followed ...
Fendt Markus - - 2005
One of the main interests in the field of neuroscience is the investigation of the neural basis of fear. During recent years, an increasing number of studies have used trimethylthiazoline (TMT), a component of red fox feces, as a stimulus to induce fear in predator naive rats, mice, and voles. ...
Shimizu Hisae H Department of Biomedical Engineering, Hokkaido Institute of Technology, Sapporo, 006-8585 - - 2005
For the study of the perception of ELF electric field, a fundamental study was conducted on the movement of body hair in field exposure. The electric force exerted on a hair was given from the force component at dielectric discontinuity. With this force, the equation of the hair displacement in ...
Andrew Richard J - - 2004
In late-stage embryos of domestic fowl, exposure of the right eye to light entering through the shell induces asymmetry of the thalamofugal visual pathway, together with differences in performance according to whether the right or left eye (RE, LE) is in use (Behav. Brain Res. 38 (1990) 211). Nevertheless, at ...
Lavoie Jean-Claude - - 2004
Light-exposed parenteral multivitamins induce in lungs peroxide-like oxidant responses as well as the initiation of fibrosis. We hypothesized that peroxides generated in light-exposed total parenteral nutrition (TPN) affect lung remodeling. The objective was to assess the specific roles of peroxides, multivitamin preparation (MVP), and light exposure on lung remodeling during ...
Perez Ronen - - 2004
The effect of previous noise induced hearing loss (NIHL) on subsequent NIHL was studied in rats. Three groups of animals were initially exposed to different durations of 113 dB SPL broad band noise (21 days, 3 days or 0 days--unexposed). Their permanent threshold shifts (PTS) from this exposure (PTS1) were ...
Salt Alec N - - 2004
Low-frequency sounds presented at high nontraumatizing levels induce temporary hyperacusis in humans and animals. One explanation of this finding is that the basilar membrane operating point may be disturbed by an endolymph volume change. This possibility was investigated using volume and flow markers iontophoresed into the endolymphatic space of guinea ...
Hunt D C - - 2004
The imaging performance of an amorphous selenium (a-Se) flat-panel detector for digital fluoroscopy was experimentally evaluated using the spatial frequency dependent modulation transfer function (MTF), noise power spectrum (NPS), and detective quantum efficiency (DQE). These parameters were investigated at beam qualities and exposures within the range typical of gastrointestinal fluoroscopic ...
Sánchez Fernández J M - - 2004
OBJECTIVE: To examine electrophysiological data from auditory brainstem responses (ABRs) and distortion product otoacoustic emissions (DPOAEs) in chickens following acoustic overstimulation. MATERIAL AND METHODS: A total of 15 white 15-day-old Leghorn chickens were used. The animals were anesthetized with Equithensin, and placed with their heads in a special holder. Click ...
Elias, SO; Department of ...
The noise levels and the effects of occupational noise exposure were determined in the students' hostels, administrative offices and the laundry department of Lagos University Teaching Hospital (LUTH). All 40 test subjects and 54 control had comprehensive otological screening and fulfilled other inclusion criteria. The subjects had pure tone audiometric ...
Nam Eui-Cheol - - 2004
OBJECTIVE: Electrocochleography (ECoG) is a sensitive evoked-response test for evaluating changes in cochlear function. We investigated the extratympanic ECoG in a noise-induced temporary threshold shift (TTS) to evaluate the usefulness of ECoG in the early detection of noise-induced hearing loss (NIHL). STUDY DESIGN AND METHODS: In a prospective analysis, 15 ...
Smith Michael E - - 2004
Fishes are often exposed to environmental sounds such as those associated with shipping, seismic experiments, sonar and/or aquaculture pump systems. While efforts have been made to document the effects of such anthropogenic (human-generated) sounds on marine mammals, the effects of excess noise on fishes are poorly understood. We examined the ...
Pawlaczyk-Luszczyńska Małgorzata - - 2004
OBJECTIVES: Firearm is a common source of impulse noise that may potentially damage hearing organ. It has been suggested that otoacoustic emissions, particularly transient-evoked otoacoustic emissions (TEOAE), might be more sensitive than pure-tone audiometry (PTA) in the assessment of changes to cochlea caused by noise. The aim of this study ...
Chertoff Mark E - - 2003
This study examined the relation between the extent of permanent hearing loss and the change in a third-order polynomial transducer function (PTF) representing mechano-electric transduction (MET). Mongolian gerbils were exposed to noise for 1 to 128 h. A control group received no exposure. The cochlear microphonic (CM) was recorded from ...
Akerstedt Torbjörn - - 2003
Sleepiness is a major problem when driving a vehicle and contributes to 15 to 30% of all road accidents. One possible countermeasure may be exposure to light. This study was designed to test whether 30 min. of exposure to a bright light would reduce subjective sleepiness and EEG indicators of ...
Love Hamish - - 2003
BACKGROUND: Surgeons working in orthopedic operating theatres are exposed to significant noise pollution due to the use of powered instruments. This may carry a risk of noise-induced hearing loss. The present study was designed to quantify the noise exposure experienced by surgeons and establish whether this breaches occupational health guidelines ...
Pasquini R - - 2003
The generation, transmission (e.g. power lines, transformers, service wires, and electrical panels), and use (e.g. home appliances, such as electric blankets, shavers, and televisions) of electrical energy is associated with the production of weak electric and magnetic fields (EMF) which oscillate 50 (Europe) or 60 (USA) times per second (power-line ...
Chen Yuh-Shyang - - 2003
The vulnerability of inner hair cells (IHCs) and outer hair cells (OHCs) to acoustic overstimulation is still controversially discussed. The present study was undertaken to investigate the vulnerability of IHCs and OHCs and the relation between chronological changes of auditory threshold shifts and stereocilia damages on IHCs and OHCs in ...
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