振动式旧砂再生机结构及其改进

介绍了振动式旧砂再生机的基本结构,以及旧砂再生过程的能量传递规律.讨论了现有的几种振动再生机的结构与性能特点,以及借鉴振动磨原理提高旧砂再生效果的方法,并介绍了离散元法(DEM)引入到旧砂再生研究中的可能.     

Manufacturing and measurement of freeform optics

Freeform optics is the next-generation of modern optics, bringing advantages of excellent optical performance and system integration. It finds wide applications in various fields, such as new energy, illumination, aerospace and biomedical engineering. The manufacturing of freeform optics is an integrated technology involving optical design, machining, moulding, measurement and characterization. This paper surveys the current application status and research on major technologies in details.     

国内外能源利用效率比较及对我国的启示

经济增长与能源消耗之间有着密切的关系。通过对快速增长的新兴经济体以及经历类似阶段的发达国家的能源利用效率的比较和政策的分析,指出我国能源问题的原因在于生活、建筑能耗方面及高耗能行业的过度消耗,进而提出规范市场、优化产业结构等政策建议,从而实现使经济发展走上资源节约型、环境友好型的良性循环这一目标。     

Theoretical analysis of long-lived radioactive waste in pressurized water reactor

Background The accelerator-driven subcritical transmuta-tion system(ADS)is an advanced technology for the harmless disposal of nuclear waste.A theoretical analy...     

A comparative study of caffeic acid and a novel caffeic acid conjugate SMND-309 on antioxidant properties in vitro

Caffeic acid (3,4-dihydroxycinnamic acid, CA) has been identified as an important source of natural antioxidants in various agricultural products. SMND-309, which is a degradation product of salvianolic acid B, is a novel conjugate of CA, but little information has been known about its antioxidant activities. In present study, we compared in vitro antioxidant activities of CA and SMND-309 using different assays such as DPPH radical scavenging assay, hydroxyl radical scavenging assay, superoxide radical scavenging assay, total antioxidant activity, reducing power, and lipid peroxidation assay. Butylated hydroxytoluene (BHT) and Vitamin C (Vc) were used as the standard antioxidants. At the concentration of 20 μg/ml, SMND-309 and CA exhibited 93.4% and 92.1% scavenging on DPPH radical, while BHT and Vc indicated an scavenging of 37.9% and 93.0% at the same concentration, respectively. Furthermore, SMND-309 is more effective on total antioxidant activity and hydroxyl radical scavenging than CA.     

羊肉部分下脚料的利用与开发

介绍了从羊肉下脚料羊血、羊心、胰脏提取的一些生化制品的性质和功能,包括凝血酶、超氧化物歧化酶、血红素、细胞色素C、胰酶,并对羊肉下脚料的合理利用提出了建议.     

多层住宅顶层改善措施

顶层住宅由于其用水、防水、隔热，上下楼不便等缺陷，不受居民的欢迎，在分配及销售上均存在着许多问题。本文对改善顶层住房的舒适性方面，提出了多种综合性措施，将顶层的不利因素转化为有利因素，具有一定的推广价值。     

Investigation of Nitrite Production Pathway in Integrated Partial Denitrification/Anammox Process via Isotope Labelling Technique and the Relevant Microbial Communities

In this study,the nitrogen removal performance of partial denitrificaiton/anammox(PDA) process was investigated by using an UASB reactor.High total nitrogen(TN) removal efficiency(91.97%) was achieved at an influent nitrogen loading rate of 0.64 kg/(m³·d).Anammox bacteria did execute the function of converting nitrate to nitrite in PDA system according to ¹⁵N isotope labeling experiments and the contribution was approximately 36.3%.Candidatus＿Brocadia,Candidatus＿Kuenenia an...     

NMOB与花生酸的组装多层膜及其非线性光学性质

利用与花生酸交替的方法，制备了2－硝基－5（N－甲基－N－十八烷基）氨基苯甲酸（NMOB）非中心对称多层膜，研究了它的非线性光学性质，结果表明，该多层膜的二次谐波强度与NMOB层数平方基本成正比。X－射线小角衍射测定结果再次表明，多层膜的排列相当有序，NMOB单层膜厚度为2．76nm.NMOB有良好的二阶非线性光学性质和出色的成膜性质，是一种很好的非线光学LB膜材料，可望用于制作光波导。