Program of the Sixty-fourth Annual Convention of the American Psychological Association: August 30-September 5, 1956, Chicago Illinois.

Presents information regarding the 64th Annual Convention of the American Psychological Association, held August 30th-September 5th, 1956, in Chicago, Illinois. Provided here are General Announcements (i.e., time and place, registration, and meeting room locations); pre-Convention session information; a list of APA Divisions; and a list, with summaries, of the Convention's presentations. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

基于AT91SAM7S64的USB/LPT转接系统的固件设计

基于AT91SAM7S64单片机设计并实现USB/LPT转接系统,给出固件设计的相关技术细节.通过该转接系统,使传统LPT接口的设备和仪器可方便地通过USB接口接入到计算机主机系统.     

HSPA＋关键技术及性能评估

就TD—SCDMA系统而言,HSPA技术有两种增强型方式：一种为多载波捆绑技术,另一种为HSPA＋。其中HSPA＋包括分组业务持续连接（CPC）、增强CELL—FACH、层2增强、下行64QAM和MIMO等5种子技术。本文将对HSPA＋涉及的各项关键技术进行详细分析,并对引入各项技术后带来的性能增益进行评估。     

64排螺旋CT诊断早期中心型肺癌的临床价值

目的:探讨64排螺旋CT诊断早期中心型肺癌的临床价值,为临床有效诊断早期中心型肺癌提供参考。方法:对74例早期中心型肺癌患者肺部行64排螺旋CT扫描,观察肺叶、肺段支气管病变情况并与手术病理诊断结果比较。结果:64排螺旋CT诊断早期中心型肺癌效果与手术病理诊断结果无显著性差异(P>0.05),不具有统计学意义。结论:应用64排螺旋CT对早期中心型肺癌进行诊断,可扫描出患者肺叶、肺段支气管的病灶部位及病变情况,且对患者无创伤,是一种安全有效的诊断方式,对临床诊断早期中心型肺癌具有一定的参考价值。     

Bioleaching of metal from waste stream using a native strain of Acidithiobacillus isolated from a coal mine drainage

In this study, the feasibility of using a biohydrometallurgical technique for selective metals recovery from electronic waste (e‐waste) by bacterial bioleaching was investigated. Acidithiobacillus was identified in coal mining acid mine drainage (AMD). The microorganism was studied using specific sequencing of a 16s rDNA fragment. The potential for the dissolution of copper from waste printed wire boards (PWBs) using the isolated Acidithiobacillus ferrooxidans (A. ferroxidans) was evaluated. The bioleaching experiments were performed in an orbital shaker at 30 °C and 170 rpm, with 10 % (v/v) inoculum and a pulp density of 30 g/L. The copper concentration was determined by energy dispersive x‐ray fluorescence (XRF). The result shows that copper recovery from PWBs using our A. ferrooxidans strain was 95 % after 8 days, which showed the feasibility of this process.     

Biochemical characterisation of MX-4, a plant cysteine protease of broad specificity and high stability

A new proteinase, mexicain-IV (MX-4), has been purified to homogeneity from the latex fruits of Jacaratia mexicana (formely Pileus mexicanus), a plant member of the Caricaceae family. MX-4 shows a Mr of 23.7 kDa, pI of 9.3 and maximum proteolytic activity on casein and BAPNA at pH 8.0–8.5 and pH 7.0–7.5, respectively. The amino acid sequence of MX-4 and its reversible inhibition by HgCl₂ show that the proteinase belongs to the family of cysteine proteinases. This enzyme exhibits rather broad substrate specificity, although there seems to be a slight preference for cleavage of peptides having certain hydrophobic residues in the P2 position. Biochemical and circular dichroism studies revealed that this enzyme belongs to the α + β class of proteins, in agreement with the results obtained by X-ray crystallographic structure determination, and showed that MX-4 has a higher pH and thermal stability than other members of the Caricaceae family, including papain. These properties make this novel protease a suitable novel analytical tool for the proteomic analysis of peptide fragments of great potential interest in the food industry and other industries.     

Zinc Nutrition and Inflammation in the Aging Retina

Zinc is an essential nutrient for human health. It plays key roles in maintaining protein structure and stability, serves as catalytic factor for many enzymes, and regulates diverse fundamental cellular processes. Zinc is important in affecting signal transduction and, in particular, in the development and integrity of the immune system, where it affects both innate and adaptive immune responses. The eye, especially the retina‐choroid complex, has an unusually high concentration of zinc compared to other tissues. The highest amount of zinc is concentrated in the retinal pigment epithelium (RPE) (RPE‐choroid, 292 ± 98.5 µg g^?1 dry tissue), followed by the retina (123 $\pm$62.2 µg g^?1 dry tissue). The interplay between zinc and inflammation has been explored in other parts of the body but, so far, has not been extensively researched in the eye. Several lines of evidence suggest that ocular zinc concentration decreases with age, especially in the context of age‐related disease. Thus, a hypothesis that retinal function could be modulated by zinc nutrition is proposed, and subsequently trialled clinically. In this review, the distribution and the potential role of zinc in the retina‐choroid complex is outlined, especially in relation to inflammation and immunity, and the clinical studies to date are summarized.     

An extension of the Hertz theory for three-dimensional coated bodies

This paper presents a work on extending the Hertz theory for circular and elliptical point contact problems involving coated bodies. The extended form of the Hertzian formulae are adopted to express maximum contact pressure, contact radius, and contact approach in terms of applied load, equivalent radius, and an extended equivalent modulus that properly considers the presence of a coating. The extended equivalent modulus is a function of Youngs moduli and Poissons ratios of the coating and the substrate, coating thickness, and a parameter, which is obtained through substantial numerical simulation. The extended Hertzian formulae are easy to use and give accurate predictions of contact characteristics.