关于促进新疆中小企业加快发展的政策思考     

中小企业发展调研组 《新疆师范大学学报(哲学社会科学版)》2010,31(3):28-33

中小企业在新疆创造社会就业、优化经济结构、增加财政收入、维护社会稳定等方面的重要作用日益凸显,但其发展中的融资难、生产要素供给不足、技能型人才匮乏、政策扶持体系不健全等问题不容忽视。为加快新疆中小企业发展,政府部门必须切实转变发展观念与政府职能,加大对中小企业的产业指导和政策扶持,协调解决垄断性行业对生产要素的供给,缓解中小企业融资困难,加强人才引进与培训,协助中小企业做好市场开拓工作,帮助企业提高经营管理水平。  相似文献   

What is the future of electrical impedance spectroscopy in flow cytometry?     

Furkan Gke  Paolo S. Ravaynia  Mario M. Modena  Andreas Hierlemann 《Biomicrofluidics》2021,15(6)

More than 20 years ago, electrical impedance spectroscopy (EIS) was proposed as a potential characterization method for flow cytometry. As the setup is comparably simple and the method is label-free, EIS has attracted considerable interest from the research community as a potential alternative to standard optical methods, such as fluorescence-activated cell sorting (FACS). However, until today, FACS remains by and large the laboratory standard with highly developed capabilities and broad use in research and clinical settings. Nevertheless, can EIS still provide a complement or alternative to FACS in specific applications? In this Perspective, we will give an overview of the current state of the art of EIS in terms of technologies and capabilities. We will then describe recent advances in EIS-based flow cytometry, compare the performance to that of FACS methods, and discuss potential prospects of EIS in flow cytometry.  相似文献   

Electrical power free, low dead volume, pressure-driven pumping for microfluidic applications     

Moscovici M  Chien WY  Abdelgawad M  Sun Y 《Biomicrofluidics》2010,4(4):46501

This paper presents a simple-to-construct, low dead volume pump capable of generating a wide range of positive and negative pressures for microfluidic applications. The pump generates pressure or vacuum by changing the volume of air confined inside a syringe and is able to generate pressures between -95 and +300 kPa with a resolution as high as 1 Pa. Different from syringe pumps and electrokinetic pumping, which are capable of controlling flow rates only, our pump can be used to generate constant flow rates or constant pressures, which are required for certain applications such as the aspiration of biological cells for biophysical characterization. Compared to syringe pumps, the new pump has almost zero dead volume and does not exhibit pulsatile flows. Additionally, the system does not require electrical power and is cost effective (～$100). To demonstrate the capabilities of the pump, we used it to aspirate osteoblasts (MC3T3-E1 cells) and to determine Young's modulus of the cells, to generate a concentration gradient, and to produce variable-sized droplets in microchannels using hydrodynamic focusing.  相似文献