Water-Soluble,Alanine-Modified Fullerene C60 Promotes the Proliferation and Neuronal Differentiation of Neural Stem Cells

As carbon-based nanomaterials, water-soluble C₆₀ derivatives have potential applications in various fields of biomedicine. In this study, a water-soluble fullerene C₆₀ derivative bearing alanine residues (Ala-C₆₀) was synthesized. The effects of Ala-C₆₀ on neural stem cells (NSCs) as seed cells were explored. Ala-C₆₀ can promote the proliferation of NSCs, induce NSCs to differentiate into neurons, and inhibit the migration of NSCs. Most importantly, the Ala-C₆₀ can significantly increase the cell viability of NSCs treated with hydrogen peroxide (H₂O₂). The glutathioneperoxidase (GSH-Px) and superoxide dismutase (SOD) activities and glutathione (GSH) content increased significantly in NSCs treated even by 20 μM Ala-C₆₀. These findings strongly indicate that Ala-C₆₀ has high potential to be applied as a scaffold with NSCs for regeneration in nerve tissue engineering for diseases related to the nervous system.     

General linear optical coordinate tranformations

New optical configurations for performing general coordinate transformation operations of shear, rotation, and their combination are presented. These configurations consist of refractive spherical and cylindrical lenses that are readily available. Typically, high-resolution imagery can be obtained, depending on the size of the input object, the illumination wavelength, and the f-number of the lenses. Basic and more general configurations are presented, along with experimental results clearly showing image shearing, rotation, and a combination of these with high-quality output imagery.     

加氢装置加热炉易爆管部位的分析

重点介绍韩国蔚山炼油厂分馏塔底重沸炉火灾事故、中国石油化工股份有限公司洛阳分公司催化裂化柴油加氢装置反应进料加热炉火灾事故、茂名分公司渣油加氢脱硫装置分馏炉火灾事故、镇海炼油化工股份有限公司加氢裂化装置脱丁烷塔底重沸炉火灾事故的情况,找出加氢装置加热炉的易爆管部位,并通过分析总结,提出了易爆管部位的选材原则、设计改进方案及维护措施.     

MILP formulations for highway petrol station replenishment in initiative distribution mode

To investigate highway petrol station replenishment in initiative distribution mode,this paper develops a mixed-integer linear programming(MILP)model with minim...     

GNSS技术与多传感器融合的滑坡监测系统研究

本文设计了一种基于GNSS技术与多传感器融合的滑坡监测系统,该系统采用低功耗设计思路,通过RT-Thread操作系统实现多任务处理与低功耗模式运行,具有与滑坡监测预警云平台通信、GNSS网络RTK实时动态高精度定位、多传感器融合、监测数据实时采集处理、滑坡地质灾害预警等功能。实验结果表明,该系统运行功耗低、数据传输速度快、可靠性高、位移监测精度可达毫米级,满足对滑坡体进行高精度变形监测预警的需求。     

Experimental study of enhanced oil recovery by CO2 huff-n-puff in shales and tight sandstones with fractures

The fractures and kerogen,which generally exist in the shale,are significant to the CO2 huff-n-puff in the shale reservoir.It is important to study the effects ...     

EDTA interfacial chelation Ca2+incorporates superhydrophobic coating for scaling inhibition of CaCO3 in petroleum industry

In this paper,the superhydrophobic poly(vinylidene fluoride)/fluorinated ethylene propylene/SiO2/CNTs-EDTA(PFSC-EDTA)composite coating was successfully fabricat...