Glass Fibre
Mostrando 37-48 de 50 artigos, teses e dissertações.
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37. Relationship of substance P to afferent characteristics of dorsal root ganglion neurones in guinea-pig.
1. The relationship between the afferent properties and substance P-like immunoreactivity (SP-LI) of L6 and S1 dorsal root ganglion (DRG) neuronal somata was examined in anaesthetized guinea-pigs. Glass pipette microelectrodes filled with fluorescent dyes were used to make intracellular recordings and to label DRG somata. The dorsal root conduction velocity
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38. Mortality and incidence of cancer among oil exposed workers in a Norwegian cable manufacturing company. Part I. Exposure conditions 1920-79.
Heavy high viscosity oils, transformer oils, and very light low viscosity oils have been used in a Norwegian company in the impregnation, sheathing, and installation of paper insulated cables. The aim of the present study was to determine exposures to oils and other chemicals at these workplaces from 1920 to 1979. Oil mist was sampled on glass fibre or membr
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39. Activation and adaptation of transducer currents in turtle hair cells.
1. Transducer currents were recorded in turtle cochlear hair cells during mechanical stimulation of the hair bundle. The currents were measured under whole-cell voltage clamp in isolated cells that were firmly stuck to the floor of the recording chamber. 2. Stimuli were calibrated by projecting the image of the hair bundle onto a rapidly scanned 128 photodio
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40. Health effects of refractory ceramic fibres: scientific issues and policy considerations.
OBJECTIVES--To review the scientific literature on the health effects of refractory ceramic fibres (RCFs). The adverse effects of exposure to asbestos has led to concern about the potential for other fibrous materials to cause diseases. For this reason the human populations most heavily exposed to synthetic mineral fibres have been examined for any adverse e
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41. Resting calcium concentrations in isolated skeletal muscle fibres of dystrophic mice.
1. Single, intact muscle fibres were dissociated enzymatically from skeletal muscles of phenotypically normal (+/?) and dystrophic mice (129/ReJ dy/dy: Dystrophia muscularis), and resting Ca2+ levels were measured by image analysis of intracellular Fura-2 fluorescence in distinct parts of the fibres. 2. Fura-2 was introduced into fibres by ionophoresis with
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42. An investigation of the acute behavioural effects of styrene on factory workers.
A group of men exposed to styrene in a factory building glass-fibre boats performed a series of behavioural tests at the beginning and end of their shift, and the results were compared with those of a referent group from the same factory. Changes in mood were noted in both groups of workers but were greater in the exposed men; moreover, the change in mood wa
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43. Mortality among long-term employees of an Ontario asbestos-cement factory.
Mortality was studied among a group of 328 employees of an Ontario asbestos-cement factory who had been hired before 1960 and who had been employed for a minimum of nine years. The group of 87 men who had worked in the rock wool/fibre glass operations, or who had been otherwise minimally exposed to asbestos, had mortality rates similar to those of the genera
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44. Cuirass respirator treatment of chronic respiratory failure in scoliotic patients.
The results are reported of domiciliary cuirass respirator treatment, using tailor-made shells, in four patients with severe thoracic scoliosis. Three of the patients had suffered from poliomyelitis. All complained of increasing dyspnoea on exertion, ultimately interfering with almost every activity of daily life; three patients had severe acute respiratory
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45. An investigation of chloride-bicarbonate exchange in the sheep cardiac Purkinje fibre.
Intracellular Cl activity (aiCl), and intracellular pH (pHi) were measured in isolated sheep cardiac Purkinje fibres using a liquid ion exchanger Cl-selective micro-electrode and a glass recessed-tip, pH-selective micro-electrode. Removal of external Cl (glucuronate substituted) produced a fall in aiCl from about 20 to about 4 mmol/l: the residual level is p
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46. Gating in the spino-olivocerebellar pathways to the c1 zone of the cerebellar cortex during locomotion in the cat.
1. The field potentials evoked in the cerebellar cortical c1 zone by single-pulse, non-noxious stimulation of the superficial radial nerve have been recorded with tungsten-in-glass microelectrodes in awake cats. Responses that were due to transmission in the spino-olivocerebellar pathways (SOCPs), which terminate in the cortex as climbing fibres, were identi
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47. Mechanically evoked responses of afferent fibres innervating the guinea-pig's ureter: an in vitro study.
1. Electrophysiological recordings from ureteric mechanosensitive afferent fibres were performed using an in vitro preparation of the guinea-pig ureter and associated nerves. Single-unit recordings were obtained from small ureteric nerves arising from the inferior mesenteric ganglion, the hypogastric nerve or the pelvic plexus. The fibre composition of these
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48. Evaluation of exposure to polycyclic aromatic hydrocarbons in a coke production and a graphite electrode manufacturing plant: assessment of urinary excretion of 1-hydroxypyrene as a biological indicator of exposure.
OBJECTIVES--Characterisation of the airborne concentration of 13 polycyclic aromatic hydrocarbons (PAHs) at various workplaces in a graphite electrode and a coke production plant. Validation of the urinary excretion of 1-hydroxypyrene (hydroxypyrene) as a biological marker of exposure to PAH. DESIGN--Cross sectional study of workers exposed to PAHs (106 in t