Nanoassembly of CdTe nanowires and Au nanoparticles: pH dependence and reversibility of photoluminescence

Radial organized nanohybrids that are composed of Au nanoparticles (NPs) surrounding CdTe nanowires (NWs) via bioconjugation of streptavidin (SA) and D-biotin (B) were prepared to compare with the non-conjugated NWs. Two respective NW-containing hybrids with/without Au bioconjugation presented the same pH dependence except for photoluminescence (PL) reversibility. It would be explained that the chemical modification of NW surface can be retarded due to the geometric hindrance of acidic fluids in nanoscale regime and the loosely encapsulated Au NPs on NWs assisted to induce the luminescence recovery from collective resonance of excitons and plasmons in nanohybrids.     

碳纳米管场效应晶体管电子输运特性的研究

由于硅器件尺寸不断缩小至纳米尺度,人们因此对纳米尺度器件开展了理论与结构方面的广泛而深入的研究,其中最重要的纳米尺度器件是基于碳纳米管的电场效应器件并被称为碳纳米管场效应晶体管(CNTFET).本文分析了碳纳米管场效应晶体管沟道电子的传输特性,并给出了用器件端子参数描述的器件I-V特性方程表达式,计算了器件的I-V特性曲线并把结果与纳米器件专用分析软件nanoMOS-2.0给出的结果作了比较,发现本文模型的计算结果均大于nanoMOS-2.0给出的结果,表明本文模型尚需进一步的深入分析和优化.     

《家具造型设计》课程实验教学改革的实践与探索

在充分认识到实验教学对培养创新型设计人才重要性的基础上,通过优化教学资源,改革实验教学内容、实验方法、考评措施,有效地调动了学生参与设计的积极性,提高了学生的创新设计能力、动手能力、沟通能力和团队协作精神,收到了良好的教学效果.     

Influence of Temperature on Bacterial Development in Waters

Microbiological stability in water mains has become an increasing problem for waterworks where more and more surface water is used for distribution requirements. Even when surface water is treated, appropriately, it usually contains a higher amount of organic compounds than does groundwater, and during certain periods, can attain temperatures between 20 and 25°C. Furthermore, ozonization applied during treatment modifies structures of the dissolved organic materials.

Twenty bacterial strains capable of aftergrowth were isolated starting from ozonized surface water, from water of subterranean origin, and from a mixture of these two types of water. Six typical strains were used to determine the importance of the temperature factor on aftergrowth in five types of waters of different characteristics.

Three criteria for the evaluation of aftergrowth are: the growth rate factor (r₂), the growth yield (maximum number of germs/mL when growth stops), and the latency time (in hours). The results, in triplicate, obtained from growth curves then were submitted to an analysis of variance by two cross classifications.

It was established that aftergrowth is related to the classical Pseudomonas and Azobacter families, but also to the species of Bacillus, Corynebacter, Micrococcus, Vibrionaceae, and even Enterobacter. Furthermore, it has been proven that the temperature factor is most important in all aspects, as an increase in water temperature enhances all growth characteristics: shortening of the lag-phase; increase in growth-rate factor; and yield.

Under practical conditions, the significant growth delay is very important. With Pseudomonas putida, the lag-phase is on the order of three days at +7.5°C and 10 hours at +17°C.     

个人计算机非线性编辑系统制作电脑特技

非线性编辑系统是目前电视栏目、广告常用的制作设备,本文首先通过个人计算机增加相关的视频1394输入输出设备,然后详细介绍非编软件在个人计算上的视觉与动态图形的电脑特技的实现,最后介绍如何渲染输出视频成品。     

关于提高基层思想政治工作实效性的探讨

把思想政治工作落实到基层,是我们党开展思想政治工作的一条基本经验,是新形势提出的客观要求。当前企业改革进入攻坚阶段,基层组织深层次矛盾及问题不断出现,职工的利益需求、思想观念趋于多样化,只有紧跟改革发展的步伐,不断探索新的工作方法,创新思想政治工作内容,营造出思想政治工作的新局面,才能使基层的思想政治工作充满生机活力,才能更好地为经济建设服务。     

Potential of Ozonated Water at Different Temperatures to Improve Safety and Shelf-Life of Fresh Cut Lettuce

The present study was carried out to determine the effect of ozonated water (2 mg L^?1) at different temperatures (4 °C and 15 °C) on the microbiological, color and sensory properties of lettuce. Cold ozone treatment (4 °C) significantly reduced the natural background microflora of lettuce. Salmonella Typhimurium and Escherichia coli inoculated on lettuce samples were insignificantly influenced by the temperature of water. During storage period at +4 °C for 14 days, the highest quality was observed from the samples treated with cold ozonated water. Ozone treatments did not affect the color properties and sensory quality of lettuce samples.     

The Relationship Between Online Pornography and the Sexual Objectification of Women: The Attenuating Role of Porn Literacy Education

Media literacy interventions partly aim at preventing undesirable media effects at a later point of time. However, longitudinal research on the interaction between media literacy education and media effects is lacking. In this longitudinal study among 1,947 13–25-year-olds, we started to address this lacuna by examining the potential of porn literacy education at schools to attenuate the longitudinal relationship between exposure to sexually explicit Internet material (SEIM) and views of women as sex objects. A two-way interaction effect emerged: The relationship between SEIM and sexist views became weaker, the more users had learned from porn literacy education. No gender or age differences occurred. This study thus provides some first evidence for the role of media education in reducing undesirable media effects.     

再生水灌溉城市园林绿地对植物矿质元素和土壤性状的影响研究

采用示范区绿地调查的方法,研究了再生水灌溉对北京地区有代表性的园林植物生长状况的影响,并采集植物叶片和立地土壤进行相关指标的化验分析。结果表明,再生水灌溉区植物生长良好,叶色正常,试验期内大部分植物外观未见有明显异常现象;叶片矿质元素总体上表现出升高的趋势;银杏、油松、连翘、紫薇、榆叶梅、玉兰、栾树等植株叶片内钠元素含量增加,钾元素含量则有所下降;叶片矿质元素含量均在正常范围内;土壤中全盐量、水溶性钠、交换态钠和氯化物均表现出升高趋势,但目前尚未达到盐害水平。最后对加强再生水在园林中的应用提出了几条建议。     

建造以乡土植物为主体的园林绿地

指出外来植物扰乱生态平衡、破坏自然环境与人文景观以及对人们生活的严重影响等各种弊端,对园林绿化的现状以及方式方法进行了反思,提出以乡土植物为主体的园林绿地建设是城市园林绿化的惟一出路.最后,指出在进行以乡土植物为主体的城市园林绿地建设过程中存在的问题及解决办法.