钢包炉(LF)预熔精炼渣的研究

预熔精炼渣具有成分均匀，性能稳定，储存时不吸水等特点，钢包炉中使用预熔精炼渣时成渣均匀且速度快，具有较强的吸附钢中非金属夹杂的能力。综合脱硫率高等冶金效果。有显著净化钢液作用。     

文控室管理

在信息时代,信息化管理的作用非常重大。首先从信息化的定义认识信息化管理,并阐述了菲林信息化管理的必要性。接着从文控室确保资料的唯一性的具体做法及好处谈论菲林信息化管理的必要性。     

Synthesis and properties of PDMS modified waterborne polyurethane–acrylic hybrid emulsion by solvent-free method

A new type of polysiloxane modified polyurethane–acrylic hybrid emulsion was synthesized by solvent-free method and the polysiloxane was introduced into the soft segment of polyurethane chains using dihydroxybutyl-terminated polydimethylsiloxane (PDMS). The formed film from the hybrid emulsion could provide obviously higher water-resistance property. The preparation technologies such as the content of carboxy group and acrylic monomer, the rate and the time of emulsification were discussed systematically. The chain structure and the particle size were confirmed by the analysis of Fourier transform infrared spectroscopy and transmission electron microscopy, respectively. The effect of PDMS content on the water resistance and the mechanical property were investigated by absorbed water ratio, water contact angle and dynamic mechanical measurement.     

双马来酰亚胺基体树脂的改性研究

本文报道用改性物B改善双马来酰亚胺/二胺预聚物溶解性的实验研究.结果表明,改性后的双马来酰亚胺/二胺基体树脂在低沸点、低毒性溶剂如丙酮中具有良好的溶解性,并且有足够的均相期,为湿法制作预浸料创造了有利条件.同时对树脂的固化反应、耐热稳定性及其复合材料在高温条件下(150℃、200℃)的层间剪切性能进行了研究.     

清水砼技术在民用建筑中的应用——浅谈建设项目如何应用新技术

本文通过介绍清水砼技术在民用建筑中的应用,对建设项目如何应用新技术进行探讨。     

在役生产装置安全评价存在的职业卫生问题

分析了在役生产装置安全评价存在的职业卫生问题,提出了如何做好重点生产装置职业病预防工作的建议。     

构建本科院校质量保障体系

近年来，新建本科院校取得了快速发展。本文结合工作实际，就新建本科院校如何尽快完成角色转变，建立健全自身的人才培养质量保障体系进行了分析和研究。     

Mechanisms responsible for resistance of sublines derived from leukemia cell lines to an antitumor agent 9-beta-D-arabinofuranosyl-2-fluoroadenine

An agent 9-beta-D-arabinofuranosyl-2-fluoroadenine (2-F-Ara-A) is a main metabolite of fludarabine, a fluorinated purine analogue with antitumor activity in lymphoproliferative malignancies. In this study, the mechanism responsible for the resistance of cancer cells to fludarabine was examined using the 2-F-Ara-A-resistant sublines JOK-1/F-Ara-A and L1210/F-Ara-A from a human hairy leukemic cell line (JOK-1) and a mouse leukemic cell line (L1210) respectively, which were established by continuous treatment of the parental cell lines with 2-F-AraA. JOK-1/F-Ara-A and L1210/F-Ara-A cells were more than 55 and 29 times more resistant to 2-F-Ara-A than were their parent cell lines, and showed a high cross-resistance to 1-beta-D-arabinofuranosylcytosine but not to doxorubicin or vincristine. These resistant sublines intracellularly accumulated almost the same amount of 2-F-Ara-A as did their parent cell lines. However, the amount of 2-F-Ara-ATP, a cytotoxic metabolite of 2-F-Ara-A, decreased by 2.6% (JOK-1/F-Ara-A C3), 6% (L1210/F-Ara-A C1) and 3.7% (L1210/F-Ara-A C7) relative to the levels in the parent cell lines. Enzymatically, these resistant cells hardly activated deoxycytidine (dCyd) and 2-F-Ara-A. In addition, the abilities to phosphorylate deoxyadenosine and deoxyguanosine were also decreased in the resistant cells in comparison with the parent cells. These findings suggest that the deficiency in activity of dCyd kinase may contribute to the resistance of 2-F-Ara-A.     

基于MVC架构文档报表管理系统的设计与实现

根据公司对文档报表管理的实际需求,通过对某房地产评估公司的日常报告文档管理的各方面的需求分析,将系统的需求抽象化、模块化、系统化,利用.NET开发平台MVC架构实现了报告信息管理、数据维护管理、公司收据和报告文档管理等功能,实现了管理文档的规范化和信息化,提高公司管理文档信息的工作质量、管理水平,为用户提供更为方便快捷的服务。