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关键词： 招标投标   评定分离   定标方案   重要成效  

摘要： 本文简述了"评定分离"的改革背景和各地试点情况,通过湖州市首个"评定分离"项目湖州市大学生创新创业中心方案与初步设计招标的实践,探索与检验了评标方案和定标方案在"评定分离"办法中的成效。总结了"评定分离"办法对招标人、投标人、评标专家及规范招投标市场的重要意义。

关键词： 生物分离工程   案例式教学方法   改革  

摘要： “生物分离工程”是理论和实践紧密结合的一门专业核心课程,针对目前该课程存在的问题,本文从理论教学、实验教学及考核方式三个方面探讨生物分离工程案例式教学方法改革,旨在全面提升学生综合素质和创新能力,培养理论和实践兼备的应用型人才。

关键词： 制药工程   制药分离   技术应用  

摘要： 目前,药物分离技术是将活性成分的物理和化学性质与要分离的系统中共存的杂质分离技术,并且在工业药物产品的工业化中起着非常重要的作用。药物分离在制药过程中必不可少,并且对制药产品的成功有重大影响。在药物分离过程中,不同的分离方法,分离设备和能量输入方法将直接影响分离产物的纯度,能耗和技术绿色化。

关键词： layer-by-layer growth   island growth   surface ligands   bimetallic layers   surface plasmon resonance  

摘要： Magnetic-plasmonic nanoparticles have received considerable attention for widespread applications. These nanoparticles (NPs) exhibiting surface-enhanced Raman scattering (SERS) activities are developed due to their potential in bio-sensing applicable in non-destructive and sensitive analysis with target-specific separation. However, it is challenging to synthesize these NPs that simultaneously exhibit low remanence, maximized magnetic content, plasmonic coverage with abundant hotspots, and structural uniformity. Here, a method that involves the conjugation of a magnetic template with gold seeds via chemical binding and seed-mediated growth is proposed, with the objective of obtaining plasmonic nanostructures with abundant hotspots on a magnetic template. To obtain a clean surface for directly functionalizing ligands and enhancing the Raman intensity, an additional growth step of gold (Au) and/or silver (Ag) atoms is proposed after modifying the Raman molecules on the as-prepared magnetic-plasmonic nanoparticles. Importantly, one-sided silver growth occurred in an environment where gold facets are blocked by Raman molecules;otherwise, the gold growth is layer-by-layer. Moreover, simultaneous reduction by gold and silver ions allowed for the formation of a uniform bimetallic layer. The enhancement factor of the nanoparticles with a bimetallic layer is approximately 10(7). The SERS probes functionalized cyclic peptides are employed for targeted cancer-cell imaging and separation.

关键词： design   apparatus   calculation   membrane   solution   separation  

摘要： An efficient design of the flat-chamber-type electrobaromembrane apparatus was developed and based on it a calculation method that allows to determine the total working area of the membranes, the useful area of the near-cathode, near-anode membranes and the volume of the solution to be separated per unit volume of the developed apparatus.

关键词： 膜分离技术   环境工程   应用现状   发展前景  

摘要： 最近几年,国内环境工程实现了大胆的创新,同时也产生了很多新型技术,其中膜分离技术是一种相对现代化的技术,能够有效的控制污染,同时可以促使水资源实现二次使用,在当前膜分离技术具备了诸多的优势,需要相关人士进一步强化研究及应用,本文主要是关于膜分离技术的应用研究,以供相关专业人士进行参考和借鉴。

关键词： 水处理环境   环境工程   膜分离技术  

摘要： 随着人类社会对自然资源开发的持续增加,很多资源自然都呈现出了迅速减少的发展趋势。由于传统物质分离方法和技术已经无法满足社会经济发展的需求,所以,相关人员必须加快新型分离技术研究和应用的力度,膜分离技术作为新型的分离技术,因为自身具有可靠耐用以及分离效果显著等特点,而被广泛应用于生活污水和工业废水的净化处理中。本文主要是在简单阐述膜分离技术原理的基础上,对该技术在水处理环境中的应用进行了分析与探讨,希望可以为我国环境保护工程的开展做出积极的贡献。

关键词： Nanocrystals  

摘要： Shear localization in nanocrystalline metals is a severely limiting factor precluding their use as practical engineering materials. While several strategies exist to enhance the thermal and mechanical behavior of these materials, there are still many outstanding questions regarding the effects of chemical segregation on shear localization in FCC nanocrystalline materials. In this paper we investigate the mechanical response of a ternary aluminum alloy with a sub-10 nm nanocrystalline microstructure subject to various thermal treatments. Contrary to previous observations, our results suggest that annealing up to 0.7 T-m reduces the propensity for shear localization and increases strength, as demonstrated by a transition in deformation morphology from pronounced strain localization to more homogeneous deformation during indentation. This behavior coincides with the formation of an amorphous intergranular film during annealing, causing intragranular dislocation plasticity to be favored over other grain boundary dominated deformation mechanisms, in turn resulting in a lower propensity for long range plastic localization. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

关键词： Mg-3Gd alloy   Boundary engineering   Segregation   Non-basal slip   Mechanical properties  

摘要： Nanostructured materials prepared by severe plastic deformation processing were puzzled by the trade-off between strength and ductility. With the synergy of boundary engineering and segregation strategy, a nanostructured Mg-3Gd (wt. %) alloy with simultaneously enhanced strength and ductility was fabricated by accumulative roll-bonding processing and subsequent annealing treatment. Based on transmission electron microscopy observations, clear evidences of Gd segregation at grain boundaries, twin boundaries, stacking faults and dislocations can be observed in annealed samples. Meanwhile, the activation of non-basal slip and intensive interaction between dislocations and Gd atoms were determined in the annealed sample after tensile testing. Boundary segregation and pinning of dislocations were considered to be the main reason for the strength enhancement, while the increase in ductility was attributed to the inhibition of premature failure by Gd segregation at twin boundaries and the activation of non-basal slip. (C) 2019 Elsevier B.V. All rights reserved.

关键词： Coconut   bulk density   true density   husk thickness   shell thickness  

摘要： Coconut husk is used as a natural fiber, and it is constantly gaining economic importance including in organic farming. Yet, there are major knowledge gaps regarding the engineering properties of coconut to design efficient coconut dehusking and coir manufacturing process. A sample of 40 coconuts of each variety, namely Malayan Yellow Dwarf, Malayan Orange Dwarf, Kera Shankara, Chowghat Orange Dwarf, and Chowghat Green Dwarf, were divided into two groups (20 dry and 20 green coconuts), and different engineering properties were measured. It was observed that coconuts show an extensive diversity in size, density, husk thickness, husk weight, shell thickness, shell weight, and kernel thickness, depending on variety and maturity. The present investigation provides necessary information and the need for classifying the coconut fruits based on size/variety rather than weight to design superior coconut dehusking machine.