<正> Toward the end of the Middle Ordovician, the whole North China Paraplatform was uplifted. It stood as a land-mass subjected to erosion and denudation till
<正> It is well known that vertical circulation of sea water is a common occurrence in the ocean. It is an integral part of the general circulation of ocean wat
<正> The Chinese river dolphin (Lipotes vexillifer Miller) is one genus of the most rarely aquatic mammals. It lives in the middle and lower reaches of the Chan
<正> SiC is known to form many polytypes with different stackings of close-packed layers among which 4H, 15R, 6H and 21R are the polytypes most frequently occur
<正> Acupuncture has been experimentally proved to be capable of exciting various groups of fibres. However, opinions differ as to which group of fibres is main
<正> Perfluoro-capryl-amido-propyl-triethoxy-silane, CF3 (CF2)6 CONH (CH2)3 Si(OC2H5)3, is a new type of organic fluoro-silieon compounds. As there is a fluoro-alkyl
<正> In the previous paper, we reported that the guar seeds were quite sensitive to chilling and a temperature around 10℃ being maintained for more than 8hr wo