Sputnik - the first artificial satellite - is launched by the Soviet Union on October 4, 1957, as a global positioning system for precise weapon delivery and paves the way for GPS as we know it today.
This article reviewed the therapeutic use of chitosan as artificial lacrima, medical viscoelastic material, carrier of drug delivery systems and so on in ophthalmic disease.
本文就壳聚糖作为人工泪液、医用粘弹剂、药物缓释系统载体、抗纤维增生药物等的应用进行简要的介绍。
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Objective: To observe the influence of carrying out artificial rupturing membrane in early activity period on birth process progress and delivery.