Two amphiphilic macromolecules were synthesized from polyethylene glycol monomethylether（PEG）and borondipyrrolmethene（BODIPY） via one-pot multicomponent Passerini reaction,and they could self-assemble into stable ...Two amphiphilic macromolecules were synthesized from polyethylene glycol monomethylether（PEG）and borondipyrrolmethene（BODIPY） via one-pot multicomponent Passerini reaction,and they could self-assemble into stable nanoparticles（NPs） in aqueous media.The optical properties,including fluorescence resonance energy transfer（FRET） were studied in detail.The obtained NPs possess good cytocompatibility,and could be used for living cell imaging and effective photodynamic therapy（PDT）.These results shed light on one-pot synthesis of PEGylated fluorescent nanoparticles via multicomponent reaction for biomedical application.展开更多
Mathematical morphology can process the binary and grayscale image successfully. This theory cannot be extended to the color image directly. In color space, a vector represents a pixel, so in order to compare vectors,...Mathematical morphology can process the binary and grayscale image successfully. This theory cannot be extended to the color image directly. In color space, a vector represents a pixel, so in order to compare vectors, vectoriel orderings must be defined first. This paper addresses the question of the extension of morphological operator to the case of color images. The proposed method used the order by bit mixing to replace the conditional order. Our order is based on a combination of reduced and bit mixing ordering of the underlying data. Additionally it is a total ordering. Since it not only solves the problems of false color generated by the marginal order but also those of multiple extrema generated by reduced order. The performance of the introduced operators is illustrated by means of different applications: color gradients for segmenting, image smoothing (noise suppression) by median filter operator and Laplacian operators. Examples of natural color images and synthetic color images are given. Experimental results show the improvement brought by this new method.展开更多
基金supported by the National Natural Science Foundation of China(Nos.51522307 and 81673396)
文摘Two amphiphilic macromolecules were synthesized from polyethylene glycol monomethylether（PEG）and borondipyrrolmethene（BODIPY） via one-pot multicomponent Passerini reaction,and they could self-assemble into stable nanoparticles（NPs） in aqueous media.The optical properties,including fluorescence resonance energy transfer（FRET） were studied in detail.The obtained NPs possess good cytocompatibility,and could be used for living cell imaging and effective photodynamic therapy（PDT）.These results shed light on one-pot synthesis of PEGylated fluorescent nanoparticles via multicomponent reaction for biomedical application.
文摘Mathematical morphology can process the binary and grayscale image successfully. This theory cannot be extended to the color image directly. In color space, a vector represents a pixel, so in order to compare vectors, vectoriel orderings must be defined first. This paper addresses the question of the extension of morphological operator to the case of color images. The proposed method used the order by bit mixing to replace the conditional order. Our order is based on a combination of reduced and bit mixing ordering of the underlying data. Additionally it is a total ordering. Since it not only solves the problems of false color generated by the marginal order but also those of multiple extrema generated by reduced order. The performance of the introduced operators is illustrated by means of different applications: color gradients for segmenting, image smoothing (noise suppression) by median filter operator and Laplacian operators. Examples of natural color images and synthetic color images are given. Experimental results show the improvement brought by this new method.
