منابع مشابه
Possible role of tungsten oxide whiskers in hard-metal pneumoconiosis.
1310 Communications to the Editor cuff inflation is seldom seen, and an increase of 1 ml or less in cuff volume can markedly increase LW? What can be done to minimize the possibility of cuff-induced tracheal damage? First, select the largest endotracheal tube that can be inserted atraumatically. A greater cross-sectional area ratio between the tube and the trachea means less air must be injecte...
متن کاملA large-scale fabrication of flower-like submicrometer-sized tungsten whiskers via metal catalysis
Tungsten powder mixed with an appropriate amount of nickel and iron powders is used as raw material to fabricate large-scale tungsten whisker-like structure. The morphology, microstructure and composition of the whisker-like tungsten are observed and tested by scanning electron microscope and FESEM, transmission electron microscopy, X-ray spectroscopy, and X-ray diffraction, respectively. The m...
متن کاملTin Whiskers Remain A Concern
The elimination of lead in electronic equipment due to governmental regulations (European Union End of Life Vehicle Directive and European Union Restriction of Hazardous Substances Directive) has increased the risk of electrical shorting due to the formation of tin whiskers in electronic products. Tin whiskers are hair-like tin structures that grow sporadically on surfaces coated with tin. Whis...
متن کاملWhiskers aid anemotaxis in rats
Observation of terrestrial mammals suggests that they can follow the wind (anemotaxis), but the sensory cues underlying this ability have not been studied. We identify a significant contribution to anemotaxis mediated by whiskers (vibrissae), a modality previously studied only in the context of direct tactile contact. Five rats trained on a five-alternative forced-choice airflow localization ta...
متن کاملAnisotropic etching of SiC whiskers.
We have demonstrated a method of producing nanoplatelets or complex well-ordered nanostructures from silicon carbide (SiC) whiskers. Preferential etching of SiC whiskers in a mixture of hydrofluoric and nitric acids (3:1 ratio) at 100 degrees C results in the selective removal of cubic SiC and the formation of complex structures resembling a pagoda architecture. Possible mechanisms governing se...
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ژورنال
عنوان ژورنال: Nature
سال: 1956
ISSN: 0028-0836,1476-4687
DOI: 10.1038/177984a0