共查询到20条相似文献，搜索用时 15 毫秒
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Heinrich Newesely 《Die Naturwissenschaften》1983,70(7):324-331
Some new trends in materials for dental implants, which also effect in the operative techniques and implant design, are described. Advantages and shortcomings of the different material types are exemplified and correlated with their bioinert resp. bioactive functions. The practical interest in metallic implants focussed in titanium resp. oxide ceramics in the ceramic field, whereas the special goal of implant research follows from the improvement of the bioactive principle with loaded calcium phosphate implants. 相似文献
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Hans Bomke 《Die Naturwissenschaften》1944,32(40-43):250-260
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W. Sandermann 《Die Naturwissenschaften》1966,53(20):513-525
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Ernst Edens 《Die Naturwissenschaften》1923,11(50):969-971
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Albrecht Hase 《Die Naturwissenschaften》1938,26(14):223-224
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Neither the “Green Revolution” in the developing countries nor “yield explosion” in the agricultural production of the industrialized nations have reached the genetic and physiologic limits of crop growth. Breeding of better varieties is still the most promising defense against hunger. The ambiguity of modern agroindustry throughout the world resides in its high dependence on the existence of functional technological, economical, and political systems.
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