资源型工矿业城市再就业问题为析——以唐山市为例

资源型工矿业城市的再就业问题与其他城市相比具有自身的特殊性和解决的紧迫性与困难性。本又以唐山市为例,在分析资源型工矿业城市再就业的困境及形成原因的基础上,探讨了这类城市再就业难题的解困思路。     

三甲基铝双聚体的结构和键合作用

以杂化理论、闭合的三中心两电子键模型对Al2 (CH3 ) 6之键角、键长等作出合理的解释 ,明确Al2 (CH3 ) 6的空间构型     

啤酒废酵母综合利用的研究进展

对啤酒废酵母的综合利用的研究进展进行了综述，对利用啤酒废酵母生产超氧化物歧化酶（SOD）、生产饲料、酵母精、谷胱苷肽、海藻糖、核酸的方法和研究进展进行了介绍，并为更合理利用啤酒废酵母进行了展望、     

Molecularly imprinted polymers as the extracted sorbents of clenbuterol ahead of liquid chromatographic determination

A pre-treatment methodology for clenbuterol hydrochloride (CLEN) isolation and enrichment in a complex matrix environment was developed through exploiting molecularly imprinted polymers (MIPs). CLEN-imprinted polymers were synthesized by the combined use of ally-β-cyclodextrin (ally-β-CD) and methacrylic acid (MAA), allyl-β-CD and acrylonitrile (AN), and allyl-β-CD and methyl methacrylate (MMA) as the binary functional monomers. MAA-linked allyl-β-CD MIPs (M-MAA) were characterized by Fourier transform-infrared (FT-IR) spectroscopy and a scanning electron microscope (SEM). Based upon the results, M-MAA polymers generally proved to be an excellent selective extraction compared to its references: AN-linked allyl-β-CD MIPs (M-AN) and MMA-linked allyl-β-CD MIPs (M-MMA). M-MAA polymers were eventually chosen to run through a molecularly imprinted solid-phase extraction (MISPE) micro-column to enrich CLEN residues spiked in pig livers. A high recovery was achieved, ranging from 91.03% to 96.76% with relative standard deviation (RSD) ≤4.45%.     

In vitro remineralization of hybrid layers using biomimetic analogs

Resin-dentin bond degradation is a major cause of restoration failures. The major aim of the current study was to evaluate the impact of a remineralization medium on collagen matrices of hybrid layers of three different adhesive resins using nanotechnology methods. Coronal dentin surfaces were prepared from freshly extracted premolars and bonded to composite resin using three adhesive resins (FluoroBond II, Xeno-III-Bond, and iBond). From each tooth, two central slabs were selected for the study. The slabs used as controls were immersed in a simulated body fluid (SBF). The experimental slabs were immersed in a Portland cement-based remineralization medium that contained two biomimetic analogs (biomineralization medium (BRM)). Eight slabs per group were retrieved after 1, 2, 3, and 4 months, respectively and immersed in Rhodamine B for 24 h. Confocal laser scanning microscopy was used to evaluate the permeability of hybrid layers to Rhodamine B. Data were analyzed by analysis of variance (ANOVA) and Tukey’s honest significant difference (HSD) tests. After four months, all BRM specimens exhibited a significantly smaller fluorescent area than SBF specimens, indicating a remineralization of the hybrid layer (P≤0.05). A clinically applicable biomimetic remineralization delivery system could potentially slow down bond degradation.     

论需求分析理论在我国高校ESP教学中的必要性

随着经济全球化的不断发展以及市场经济的日益完善,宏观社会环境将英语作为工具的价值推向极点,具有英语技能以及某种实用专业知识的毕业生尤受就业市场的欢迎。作为ESP教学发展重要阶段的需求分析理论是ESP教学的基石,在整个ESP教学活动中的作用是无可取代的。本文讨论了需求分析理论的概念及其在ESP教学中的必要性,旨在使其在我国高校ESP教学中受到应有的重视。     

扩招趋势下我院专业建设现状与思路

本文针对我院的专业建设进行了系统的思考，对专业建设的紧迫性、专业建设的困难进行了全面的分析，提出专业建设的思路与措施，并提出专业建设应处理好相应的关系，总结出专业建设与专业发展的统一性。     

20世纪20年代末30年代前期南京国民政府基层警政建设浅论

南京国民政府形式上统一中国后,为推行地方自治和建设现代化国家的需要,开始致力于基层警政的建设。国民政府颁布了相应的法令法规对基层警察建制作了规定,以期实现国家对基层的有效控制。但理想与现实之间存在着巨大的差距,事权不统一、经费严重匮乏、缺乏训练有素的员警、传统治安力量与现代警察间的冲突等原因,使国民政府的基层警政建设收效甚微。     

以"生利"为出发点的民办高校教师队伍建设

“生利”主义理论是我国教育家陶行知提出的教师教育理论，它对开展民办高校教师队伍建设具有重要的指导意义。本文分析了民办高校教师的现状与问题，依据“生利”原理提出合理配置教师资源、实现教师资源共享、建立以人为本的管理体制及提供良好的外围环境等加强队伍建设的对策。     

晚清民间教育改革的原因、措施及其影响

晚清民间教育在官学教育改革的积极影响下,通过书院改学堂、私塾改良等措施,开始了自身的近代化历程。