منابع مشابه
Injuring potential of drinking glasses.
At a party of a sports club, an argument started between two groups of young men, in the course of which one of the persons involved threw a beer glass hitting a young man of the other group, who collapsed with a profusely bleeding wound. Although resuscitation measures were initiated immediately, the victim died at the scene due to exsanguination from the completely severed left external carot...
متن کاملLightning Strike Glasses as an Analog for Impact Glasses:
Introduction: The process of lightning striking rock or sand is chemically very similar to impact events, especially micrometeorite impacts. Both processes cause a rapid rise in temperature followed by rapid isentropic cooling [1]. These processes result in glassy products such as fulgurites, tektites, and lunar regolith agglutinates that are often chemically reduced from their starting materia...
متن کاملImpact melts and glasses on Mars
[1] Dark mobile materials on Mars are widely considered to be volcanically derived windblown particulates. Such a conclusion is consistent with the large volcanic edifices on Mars and the assumption that a volatile-rich crust would not favor significant impact melt generation. Several post-Viking discoveries, however, provide new perspectives for reconsidering alternative origins not only for s...
متن کاملEffect of P2O5 on Crystallization Behavior and Chemical Resistance of Dental Glasses in the Li2O-SiO2-ZrO2 System
Commercial dental lithium disilicate based glass-ceramics containing various amounts of P2O5 were synthesized. Regarding the crystallization behavior and physico-chemical properties of the glasses, the optimum percent of P2O5 was determined.as 8 %wt. Crystallization behavior of the glasses was investigated by X-ray diffraction (XRD) and differential thermal analysis (DTA). The micro-hardness a...
متن کاملDiscovery of Discrete Structured Bubbles within Lunar Regolith Impact Glasses
The unusual morphology and internal structure of bubbles within lunar regolith impact glasses have been studied using traditional scanning electron microscopy and the novel technique transmission X-ray microscopy (TXM), with 3D tomography reconstruction. Here, we show the previously unknown phenomenon of building a highly porous cellular structure within bubbles in glassy particles of the dust ...
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ژورنال
عنوان ژورنال: BMJ
سال: 1991
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.303.6813.1330