Objective: To evaluate the influence of denture material and its surface roughness on retention of upper complete denture .

目的：评价全口义齿基托材料及其表面粗糙度对义齿固位的影响。

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It was concluded that surface mulching in the form of stubble retention and vegetative coverage is more important than any other management option in improving infiltration.

结果表明，就提高渗透而言，以残茬保留及植被覆盖形式的表面覆盖比任何其他管理措施更重要。

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In paper making chitosan can be used as fortifier sizing agent retention and filtration aid surface modifier and flocculation agent for paper-making effluent.

在造纸方面，壳聚糖可用做纸张增强剂、施胶剂、助留助滤剂、表面改性剂和造纸废液的絮凝剂。

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