منابع مشابه
Man-made mineral fibres.
minerai fibres in boards for sound-insulation of ceiling (Dan.). Ugeskr. Laeger, 145, 43-47 American Conference of Governmental Industria1 Hygienists (1986) Threshold Limit Values and Biological Exposure Indices/or 1986-1987, Cincinnati, OH, pp. 19,34 Andersen, A. & Langmark, F. (1986) Incidence of cancer in the mineral-wool producing industry in Norway. Scand. J. Work Environ. Health, 12 (Supp...
متن کاملMan made deltas
The review of geochronological and historical data documents that the largest southern European deltas formed almost synchronously during two short intervals of enhanced anthropic pressure on landscapes, respectively during the Roman Empire and the Little Ice Age. These growth phases, that occurred under contrasting climatic regimes, were both followed by generalized delta retreat, driven by tw...
متن کاملMan-made Mineral Fibres
practice, the detection Ii mit of scanning electron microscopy is about 0.1 j.m (Middleton, 1982). Transmission electron microscopy may be required to detect very thin fibres (Rood & Streeter, 1985). The elemental composition of individual fibres can be determined with an energy-dispersive X-ray ana1ysis attachment combined with an electron microscope (Middleton, 1982). Fibres are counted and s...
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The urban development process displays regressive tacit-dominant knowledge areas and their tacit level would impede their movements during multi-level knowledge transfers among stakeholders. The accuracy of a knowledge may be distorted when recipient stakeholders fail to understand a specific knowledge for its purpose. Earlier studies by the authors had highlighted complex yet dynamic environme...
متن کاملEnzymatic Treatment of Man-made Cellulosic Fabrics
Cellulases have been used in garment wet processing for approximately eight years. The majortty of cellulase enzyme used In textile appllcatlons has been on cotton. Denim jeans and knit and woven cotton garments are frequently treated. Cellulases effectively improve cotton’s surface eppearanco, hsndie and drape, and nsduce It0 tendency to pili or fuzz after repetitive iaunderings.‘-‘ Today, cal...
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ژورنال
عنوان ژورنال: Nature
سال: 1977
ISSN: 0028-0836,1476-4687
DOI: 10.1038/268478a0