魔幻厨房

前有周星驰的《食神》,后有张国荣的《满汉全席》,电影以其独特的魅力诠释了“民以食为天”这句老话。饮食文化源远流长,美食的故事一般都发生在厨房,由此厨房也承载了更多的意义。本期“酷型”特别奉上一组于厨房中使用的家居产品,相信它们一定会为你的餐桌增添靓丽的色彩。     

On electrets

(I) Evidence has been given that the so-called permanent electrets of Eguchi are not permanent, but that their polarization decays with the time. At room temperatures this decay is too slow to be observed directly; but it is the decay of the polarization that, at least in part, accounts for the presence of the free charges that are always observed. At higher temperatures the results that have been obtained are consistent with the view that the rate of decay of the polarization increases very rapidly with the temperature; so much so that the polarization may be almost completely destroyed at a temperature which is not high enough to cause any appreciable softening of the waxes that form the substance of the electrets.(2) As is to be expected from Lord Kelvin's hypothesis as to the cause of pyro-electricity, these electrets have been shown to possess the pyro-electric property.(3) The piezo-electric effect, which always accompanies the pyro-electric property, has been shown to be exhibited by these electrets.