摘要:
An SiOx/Si/C composite material, includes SiOx/Si composite particles and a carbon coating layer coated on the SiOx/Si composite particles. The SiOx/Si composite particles include nano-silicon crystallites embedded in an SiOx (0
摘要:
The present invention discloses derivatives of shikonin, alkannin and a racemic mixture thereof with hydroxyl methylation and carbonyl oximation on the parent nucleus, and their application. The derivatives of shikonin with hydroxyl methylation and carbonyl oximation on the parent nucleus have structural formula (I) or (II); the derivatives of alkannin with hydroxyl methylation and carbonyl oximation on the parent nucleus have structural formula (III) or (IV); the derivatives of a racemic mixture of shikonin and alkannin with hydroxyl methylation and carbonyl oximation on the parent nucleus have structural formula (V) or (VI); wherein R 1 is alkane, olefin, arene, or substituted arene comprising 1 to 6 carbon atoms; and R 2 is alkane, olefin, arene, or substituted arene comprising 1 to 6 carbon atoms or is H. The oxime derivatives of shikonin, alkannin and a racemic mixture thereof in the present invention have novel structures; and in-vitro experiments show that said derivatives of the present invention have good growth inhibitory activity against tumor cells and thus can be used in tumor treatment.
摘要:
The applications and medical devices of Midkine in the field of biotechnology are described in this invention. This invention describes the applications of the protein as follow in (a) or (b) in preparing drugs for promoting cartilage growth or treating cartilage diseases, the protein as a growth factor for promoting chondrocyte proliferation, or medical devices containing this protein: (a) the protein whose amino acid sequence is shown as SEQ ID NO.1; (b) the proteins whose amino acid sequence have at least 60% homology comparing with amino acid sequence described in (a) and have activity for promoting proliferation of chondrocyte. The protein described in this invention promotes proliferation of three types of chondrocytes and is used for preparing drugs for treating cartilage disease. It may provide new therapy for treating cartilage diseases clinically, and new technology for expansion of chondrocytes in vitro for cartilage tissue engineering.
摘要:
Polymerization process for preparing monodispersal organic/inorganic composite nano-microsphere in the field of nanometer technology is disclosed. The process comprises preparing two different miniemulsion systems of A with inorganic nanoparticles and B with polymerisable monomers in advance; adding water-soluble initiator into A, stirring till complete dissolution, then adding B to stir till mixing evenly;finally, heating the mixed system to a given temperature for isothermal reaction. The grain size of the superparamagnetic Fe 3 O 4 /polystyrene is homogeneous and controllable, and the magnetic particles content is controllable.
摘要:
An optical pulse compression reflectometer is provided, which comprises: a single wavelength continuous optical source, an optical splitter, a modulation frequency pulse generating module, an optical directional coupler, an optical fiber under test, an optical coupler, a balanced photodetecter, and a pulse compression processing module. The present invention, in addition to overcoming the contradictory constraint between spatial resolution and measurement range in traditional time domain reflectometry and giving to full play the super spatial resolution from frequency modulation technology, has a longer measurement range than that in the optical frequency domain reflectometry.