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Improving the charge transfer of quantum dots and the electron transport layer can greatly improve the efficiency of quantum dot sensitized solar cells (QDSSC). In this work, we used the ligand exchange method to improve the electron transfer efficiency between CdSe QDs and electron transport layer. The short chain-ligand containing disulfide bond and benzene ring conjugated structure was selected as the surface ligand of CdSe QDs. Because of its unique disulfide bond and conjugated structure, the stability and electron transfer efficiency of QDs in TiO2 layer can be effectively improved. The surface ligand has good stability and the ability to promote charge transfer, which can effectively improve the efficiency of QDSSC. By characterizing of fluorescence performance and the analysis of fluorescence lifetime, the surface of this ligand behaves fluorescence quenching phenomenon and life decay phenomenon after modification. Furthermore, photovoltaic devices constructed by the as-prepared dithiocarbamate functionalization of CdSe@TiO2 have also been assembled with the highest PCE of 5.22%.

Microbial oils has been studied for many years, research shows that a variety of oleaginous microorganisms, such as yeast, fungi, bacteria, and microalgae can produce oils. The composition of microbial oils are C16:0, C18:1 and C18:2, The research of microbial oils focuses on food and Health care products other fields, especially in the field of bio-energy have been more and more attention, this paper introduced the development process of the microbial oils and the superiority of microbial oils in the bio-energy.

In order to probe into orderliness changes of Glutathione S-Transferase (GST) of chloroplast of Puccinellia tenuiflora seedlings under Na2CO3 stress and its function in resistance to Na2CO3 stress, relative electric conductance, GST activity and the O2-.produce rate of the chloroplast, and the osmotic potential of leaves, and the osmotic potential of culture solution of P. tenuiflora seedlings under different Na2CO3 stress were concerned. The result shows that in the Na2CO3 stress range of 0～0.4%, along with the increase of its intensity under different Na2CO3 stress intensity, GST activity of the chloroplast of seedling leaves of P. tenuiflora is strengthened and GST activity is rapidly weakened with the increase of the intensity of Na2CO3 stress more than 0.4%. The change of GST activity of the chloroplast along with the osmotic potential of culture solution and seedling leaves, relative electric conductance of the seedling leaves as well as the O2-.produce rate have the similar change tendency. There is significant nonlinear relationship among GST activity of chloroplast, osmotic potential of the seedling leaves and Na2CO3 concentration of culture solution, and among GST activity of chloroplast, O2-.produce rate and osmotic potential of seedling leaves, and among GST activity of chloroplast, osmotic potential of culture solution and that of seedling leaves, and among GST activity, the O2-.produce rate of chloroplast and relative electric conductance of the seedling leaves. These indicate that GST of chloroplast plays an important role in the process of seedlings of P. tenuiflora in resistance to the low intensity of Na2CO3 stress.

Single cell oil have been researched many years, the paper introduced the single cell oil and the main of microorganism which can produce the lipid, including bacteria, yeast, fungi and algae, single cell oil is benefit to the food industry and the bio-energy in the future.