Photodynamic therapy (PDT) is a new cancer therapy that has gained much attention in recent years. This method is uniquely selective compared to traditional therapies. However, PDT photosensitive drugs (such as photoporphyrin) which are usually used in clinic effectively absorb light energy only in the visible light region below 700 nm, and such light usually can not reach deep tissues due to strong scattering effect. One improved method is the application of two-photon excited technology (TPE) to PDT, which is excited by a light source that is double the absorption wavelength of the sample under the excitation of a strong pulsed laser (in the infrared or near infrared region) For photodynamic therapy from the superficial treatment to the deep tissue treatment to expand the possible options. Recently, a series of nano-biomaterials, such as biocompatible microcapsules prepared by the layer-by-layer self-assembly technique, were obtained through the assembly method supported by the National Natural Science Foundation of China and the Ministry of Science and Technology (Angew. Chem. Int Mater. 2012, 22, 1446-1453), or by biomolecule-induced preparation of mesoporous silica nanoparticles (Adv. Funct. Mater. 2016, 26, 2561-2570; ACS Appl. Mater. Interfaces 2016, 8, 8900-8907). Two-photon dyes and conventional photosensitizers are co-assembled to allow two-photon dyes and photosensitizers to undergo fluorescence resonance energy transfer (FRET) in confined spaces within the assembled nanomaterials described above to obtain two-photon excitation photodynamic therapy TPE-PDT) system. The assembly of the TPE-PDT system is designed to broaden the selection of two-photon dyes and photosensitizers and to precisely control FRET efficiency at the nanometer scale. Figure: Microcapsules prepared by multilayer assembly for FRET analysis and two-photon photodynamic therapy
Our Cling Film is wildly used in industry and household. They are water proof, good appearance, transparency, non-toxic, tasteless and strong tensile strength. The fresh film could lock the freshness of food, fruits and vegetables and keep moisture. The Stretch Film is good for industrial packing, could protect the products from away from water or dust.
Cling Wrap,Plastic Cling Wrap,Plastic Sara Wrap,Plastic Wrap For Food,Plastic Film,thin plastic film BILLION PLASTIC MANUFACTURING CO.,LTD, JIANGMEN , https://www.jmtshirtbag.com
The assembly of nano-biomaterials made a series of advances in two-photon photodynamic therapy