民族地区中小学图书馆室建设探索

人们对中小学校图书馆室等基础功能设施建设重视不够。文章从图书馆室的装备、管理和效益三个方面,结合民族地区的特点和教育现状,提出了民族地区中学小校图书馆室建设和管理模式,供当地教育行政部门和学校参考。     

Tandem Biocatalysis by CotA-TJ102@UIO-66-NH2 and Novozym 435 for Highly Selective Transformation of HMF into FDCA

2,5-Furandicarboxylic acid(FDCA) is a potential biorenewable chemical for applications including plastics, polyamides, drugs, etc. The selective biosynthesis of FDCA from 5-hydroxymethylfurfural(HMF) by a specific enzyme poses a great challenge. In this study, we reported an efficient strategy to produce FDCA from HMF by the tandem biocatalysis of laccase(Cot A-TJ102@UIO-66-NH_2) and Novozym 435. For the first step, a nanoparticle metal–organic framework was synthesized as a carrier to immobilize Cot A-TJ102@UIO-66-NH_2, which was assigned for the production of 5-formyl-2-furancarboxylic acid(FFCA) and featured an enzyme loading of 255.54 mg/g, specific activity of 135.90 U/mg, and solid loading ratio of 99.65%. Under optimal conditions, an ideal FFCA yield of 98.5% was achieved, and the Cot A-TJ102@UIO-66-NH_2 presented a high recycling capacity after 10 cycles. For the second step, Novozym 435 was applied for the further conversion of FFCA into FDCA, presenting a high FDCA yield of 95.5% under the optimized conditions. Novozym 435 also exhibited a high recyclability after eight cycles. As a result, the tandem biocatalysis strategy provided a 94.2% FDCA yield from HMF, indicating its excellence as a method for FDCA production.     

Ecological Mural as Community Reconnection

Murals are particularly visually captivating forms of public art due to their size and accessibility. Mural images also capture public attention and provoke viewers to explore layers of meaning and find hidden stories. They are often in places that people come to visit, study, play, congregate and discuss matters that may relate to the content of the mural. To this end, murals can be effective tools for helping communities think about their environmental issues. This article discusses the Mystic River mural project in Somerville, Massachusetts, USA. It addresses how the local art councils, mural artists, local students, community members and non‐profit organisations collaborated to carry out this ongoing mural project. The purpose of this research is to examine how Mystic River eco‐murals were created, what challenges and benefits the eco‐murals provided, how local social concerns were represented through the eco‐murals, how eco‐murals can continue to promote environmental awareness and inspire youth about their community and the local environment, and how the mural can continue to reflect or affect the meaning of the place. This process can serve as an example for other communities that seek to address their environmental concerns through public art.     

《电力电子学》多媒体交互式虚拟实验的实现技术

该文介绍了针对大学本科基础专业课程《电力电子学》教学课件中虚拟实验的实现技术。Flash软件的ActionScript是一种面向对象的编程方法,通过Flash深入编程,该研究实现了由JAVA编程达到的虚拟试验效果,同时探索了严格意义上的交互式虚拟课件的技术实现方法。     

Simple Preparation of Spherical Activated Carbon with Mesoporous Structure from Phenolic Resol and Associated Catalytic Performance in Isobutane Dehydrogenation

This study provides a detailed report on the synthesis of spherical activated carbon with mesoporous structure using a soluble low molecular weight phenolic resol precursor through an ammonium alginate assisted sol–gel method. The effects of calcinating temperature and the addition of CaCO_3 as a pore-enlarging agent on texture structure and catalytic performance in isobutane dehydrogenation to isobutene were investigated. Characterization of N_2 sorption,mechanical strength tests,and optical photographs confirmed that the obtained carbon materials had high mechanical strength,a good degree of sphericity,and a large surface area. Introducing CaCO_3 as a pore-enlarging agent during the preparation process promoted the formation of a mesoporous structure of carbon spheres and evidently increased the surface area and oxygen content,which can improve isobutane conversion and isobutene selectivity of these carbon spheres. The conversion of isobutane reached up to 28% for this spherical activated carbon,and the selectivity of isobutene reached up to 96%. Isobutane conversion increased with an increase in calcination temperature due to an increase in the oxygen content,whereas the selectivity of isobutene decreased due to the slight decrease in the specific surface area.     

试论区域科技创新体系的构建与推进

文章论述了构建区域科技创新体系应遵循的基本原则,并根据相关原则及各子系统的功能和相互关系构筑了区域科技创新体系组织结构的框架模型,即认为:区域科技创新体系包括两个层次、六个子系统。最后提出了推进区域科技创新体系建设的一些对策措施。     

浅谈专业英语授课中的同步复习

随着与国际社会交流机会的增多．英语水平成为衡量学生能力的一个重要方面，英语教学是高等职业技术学院教育中十分重要的一部分。当前，高职生英语基础较差．在专业英语授课过程中要强调同步复习这一环节。     

直觉与习俗的撞击——简析厄普代克的短篇小说《A&P》主题

厄普代克是美国 2 0世纪颇有影响的多产作家 ,在他的作品中延续着一个主题 :个人需要与社会需求的冲突。个人需要与社会需求反映在一个人身上往往表现为个人直觉行为 ,以及对社会实用主义的趋同行为。这两种行为在厄普代克笔下的人物身上均有表现 ,一方无法取代另一方成为解决冲突的方向     

体验式地质教学虚拟平台建设研究

在分析了体验式教学特征的基础上,将该模式引入到地质教学中,可利用虚拟现实技术和多媒体技术建设体验式地质教学虚拟平台。本文基于"分层化模式"思路,提出了平台体系结构,并介绍了构建网络虚拟教学平台用到的JSP、Oracle10g、Virtools等关键技术。建成后的平台能够将独立的、分散的教学、科研子系统集成起来,为用户提供了多源的教学服务。     

基于Windows2000环境下的缓冲区溢出

通过对Windows内存结构及进程空间分配情况的介绍,详细描述了Win2000环境下缓冲区溢出的原理,并提出了预防缓冲区溢出的有效方法。