International factoring is an alternative method of international settlement and financing provided by factors to exporters or importers. In terms of its particular advantages, international factoring is now widely us...International factoring is an alternative method of international settlement and financing provided by factors to exporters or importers. In terms of its particular advantages, international factoring is now widely used in effectively improving cash flow, avoiding bad debts, reducing operation expenses and increasing financing capital. This article starts with the background of international factoring, then goes deep into the meaning and relative merits of it. Finally, it is attempting to stress the significant use of international factoring again.展开更多
Natural biopolymer-based hydrogels have been extensively studied in recent years due to their excellent biocompatibility.However,the preparation of multi-functional and tough natural biopolymer-based hydrogels is stil...Natural biopolymer-based hydrogels have been extensively studied in recent years due to their excellent biocompatibility.However,the preparation of multi-functional and tough natural biopolymer-based hydrogels is still a challenging problem.Herein,a natural biopolymer-based hydrogel is prepared using gelatin and carboxymethyl chitosan(CMCS)through a one-step soaking method.The prepared hydrogel without any synthetic polymers and crosslinking agents has a fully physical crosslinking structure.Due to the hydrophobic interaction brought by the Hofmeister effect,the mechanical properties of soaked hydrogels(tensile stress and strain can reach 3.77 MPa and 1082%)are superior to conventional protein hydrogels.In addition,the prepared gelatin/carboxymethyl chitosan(Gel/CMCS)hydrogels exhibit a variety of appealing properties,including good shape memory,fatigue resistance,electrical conductivity,water retention,drug releasing,antibacterial property,and recyclability.This strategy opens up a new horizon to fabricate hydrogels with excellent mechanical properties and multiple functions,which can extend their applications in the biomedicine area and other related fields.展开更多
《资源描述与检索》(Resource Description and Access,RDA)的问世,是国际编目理念和实践的深刻变革,也为国内中外文编目规则实现统一提供了最大机遇。介绍了RDA创立的"作品规范检索点"的概念及其作用,指出了国内中文编目规...《资源描述与检索》(Resource Description and Access,RDA)的问世,是国际编目理念和实践的深刻变革,也为国内中外文编目规则实现统一提供了最大机遇。介绍了RDA创立的"作品规范检索点"的概念及其作用,指出了国内中文编目规则在实现目录职能方面存在的明显不足,并通过几个实例论述了将"作品规范检索点"应用于国内中文编目的必要性和可能性,以便为实现国内中外文编目规则的统一创造重要的前提条件。展开更多
文摘International factoring is an alternative method of international settlement and financing provided by factors to exporters or importers. In terms of its particular advantages, international factoring is now widely used in effectively improving cash flow, avoiding bad debts, reducing operation expenses and increasing financing capital. This article starts with the background of international factoring, then goes deep into the meaning and relative merits of it. Finally, it is attempting to stress the significant use of international factoring again.
基金This research was supported by Project of the Jilin Provincial Science and Technology Department,China(No.20190201078JC).
文摘Natural biopolymer-based hydrogels have been extensively studied in recent years due to their excellent biocompatibility.However,the preparation of multi-functional and tough natural biopolymer-based hydrogels is still a challenging problem.Herein,a natural biopolymer-based hydrogel is prepared using gelatin and carboxymethyl chitosan(CMCS)through a one-step soaking method.The prepared hydrogel without any synthetic polymers and crosslinking agents has a fully physical crosslinking structure.Due to the hydrophobic interaction brought by the Hofmeister effect,the mechanical properties of soaked hydrogels(tensile stress and strain can reach 3.77 MPa and 1082%)are superior to conventional protein hydrogels.In addition,the prepared gelatin/carboxymethyl chitosan(Gel/CMCS)hydrogels exhibit a variety of appealing properties,including good shape memory,fatigue resistance,electrical conductivity,water retention,drug releasing,antibacterial property,and recyclability.This strategy opens up a new horizon to fabricate hydrogels with excellent mechanical properties and multiple functions,which can extend their applications in the biomedicine area and other related fields.
文摘《资源描述与检索》(Resource Description and Access,RDA)的问世,是国际编目理念和实践的深刻变革,也为国内中外文编目规则实现统一提供了最大机遇。介绍了RDA创立的"作品规范检索点"的概念及其作用,指出了国内中文编目规则在实现目录职能方面存在的明显不足,并通过几个实例论述了将"作品规范检索点"应用于国内中文编目的必要性和可能性,以便为实现国内中外文编目规则的统一创造重要的前提条件。
