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China develops 250,000-ton level Extrusion Line of HDPE (High Density Poly Ethylene) compounding granulation

China develops 250,000-ton level Extrusion Line of HDPE (High Density Poly Ethylene) compounding granulation
Researchers from Key Laboratory of Chemistry of Northwestern Plant Resources, Chinese Academy of Sciences, have invented a method for preparing nano natural medicinal material particles by liquid-phase ultrasonic technology. They have received a Chinese invention patent for the technique on June 27. The patent number is ZL200910117753.X.
In the method, natural medicinal materials serving as raw materials are subjected to primary grinding, liquid-phase ultrasonic grinding, vacuum drying and the like to prepare the nano-level particles.
The method has the advantages of fully grinding the natural medicinal materials and preparing the nano-level natural medicinal material particles. In this way, it not only ensures that the medicinal material particles keep main characteristics of the natural medicinal materials, but also makes the medicinal material particles have nano-level in size.
Nanomaterials are materials with morphological features on the nanoscale, and especially those that have special properties stemming from their nanoscale dimensions.Important aspects of nanomaterials are high dispersivity and the vastly increased ratio of surface area to volume present, which endows nanomaterials with special physical and chemical characteristics.
Grinding natural medicinal materials by liquid-phase ultrasonic technology can not only ensure that the medicinal material particles keep main characteristics of the natural medicinal materials, but also makes the medicinal material particles have nano-level in size. Thus, it is a key technology in the modernization of Chinese Traditional Medicine.
Microfluidic technology is an emerging field and has many applications in biochemical analysis and point-of-care diagnosis of diseases. It provides a new set of molecular biology tools for performing biochemical reactions at the nanoliter scale. Microfluidic system has many advantages over conventional techniques for its low cost, low consumption of reagents, high throughput and parallel processing capabilities.
Researchers of Shenzhen Institutes of Advanced Technology developed a novel integrated microfluidic system with individual controller for effective large scale single-cell transcriptome analysis, providing a valuable tool for cancer genetic analysis and diagnosis. Single-cell transcriptome analysis is very important in cancer research.
The proper characterization of the gene expression heterogeneity found in a cell population is the key factor to understand the development, progression, and treatment of cancers, and has tremendous potential for the assessment of genetic stability, identification of biomarkers and development of targeted therapy for personalized medicine.
However, conventional molecular biology techniques provide averaged data of many cells and erase the heterogeneity. The system overcomes this difficulty and processes a large number of cancer cells in a parallel way, and analyzes the gene expression profile with high efficiency.
The microfluidic system integrates individual addressable units with a variety of components for single-cell gene expression analysis, including cell trapping, manipulation, mRNA purification, cDNA synthesis, and prepares samples for PCR analysis.
The research results suggest that this platform can be developed into a potential novel method of evaluating the genetic stability of a cell population and distinguishing different types and stages of cancer cells. This new lab-on-a-chip platform can be developed to an efficient tool for fast single cell genetic analysis, and has great potential for cancer diagnosis.
The research results have been published online on June 13 in Lab on a Chip (Impact Factor 6.24), Royal Society of Chemistry, which is the top journal in the field of microfluidics ().
The ionization dynamics of molecules by electron impact has been studied by researchers at Atomic Physics Group I at Institute of Modern Physics, Chinese Academy of Sciences (IMP) , in cooperation with colleagues from Max-Planck Institut für Kernphysik (MPIK), Germany and Department of Physics, Missouri S&T University, USA.
Electron impact single ionization of atomic and molecular targets is a fundamental process which is important in a wide range of science and technology, such as plasmas physics, chemistry of planetary atmospheres and radiation damage of living tissues. Detailed information about this process can be obtained from the kinematically complete experiments, or (e, 2e) experiments, which determine the momentum vectors of all continuum particles.
Single ionization of the methane (CH4) 1t2 orbital by 54eV electron impact has been investigated. Triple differential cross sections are obtained under both the coplanar geometry and the no-coplanar geometry, and are compared with the results of the molecular 3-body distorted wave (M3DW) approximation and the distorted wave Born approximation (DWBA).
Overall the agreement between experiment and theory was better for the faster electron at smaller scattering angles. The study has confirmed the importance of nuclear scattering by reducing the C-H distance in the theoretical model.
Further, researchers at IMP pointed out that at particular kinematics in the intermediate energy range, the electron momentum distribution of the target molecule plays a major role in the ionization process, rather than the molecular configuration as suggested in previous publications.
The results have been published in Chemical Physics.
The articles can be linked as follows:
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