Design,Synthesis and Synergistic Effects of Novel Derivatives of Solanesol

To further explore the biological activities of solanesylamine derivatives, several novel solanesylpiperazinotri-amines and their amides were designed and synthesized, the chemical structures of target compounds were confirmed by IR, ^1H NMR, MS, and element analysis. The in vitro antitumor activities of the synthetic compounds were as-sessed by MTT test on L1210 and CHO cells. The preliminary results showed that at low micromolar concentrations these compounds exhibit obvious toxicity against tumor cells, and the synergistic effect on clinical antitumor agent in-dicated that at noncytotoxic concentrations, they also evidently enhance the curative effect of vincristine（VCR）. The synergistic effects of compounds 4a, 4c, and 9 were even superior to that of reference compound N,N＇-bis（3,4-dime-thoxybenzyl） -N- solanesyl-ethylenediamine （ SDB ）.

Synthesis and Antitumor Activities In Vitro of Solanesylpiperazinotriamine

A series of novel antitumor agents-the solanesylpiperazinotriamine derivatives were designed and synthesized, their structures were confirmed by IR,^ 1H-NMR, MS, and element analysis. The preliminary tests showed that at low micromolar concentrations these compounds exhibited obvious toxicity on tumor cells in vitro, and the synergistic effect on clinical antitumor agent indicated that at noncytotoxic concentrations they also evidently enhanced the curative effect of vincristine.

Fabrication of High-purity Ternary Carbide Ti_3AlC_2 by Spark Plasma Sintering(SPS)Technique

The effect of silicon on synthesis of Ti3AlC2 by spark plasma sintering （SPS） from TiC/Ti/Al powders was investigated. X-ray diffraction （XRD） and scanning electron microscope （SEM） were used for phase identification and microstructure evaluation. The results show that addition of silicon can considerably accelerate the synthesis reaction of Ti3AlC2 and fully dense, essentially single-phase （purity 〉98%） polycrystalline Ti3AlC2 could be successfully obtained by sintering 2TiC/lTi/lAl/0.2Si powders at 1 200- 1 250 ℃ under a pressure of 30 MPa. SEM photographs show that the obtained Ti3AlC2 samples from mixtures powders are in plane-shape with a size of about 2-5 μm and 10-25 μm in the thickness dimension and elongated dimension, respectively.

Annealed Treatment Effect in Poly（3-hexylthiophene）：Methanofullerene Solar Cells

Polymer photovoltaic devices based on poly（3-hexylthiophene） （P3HT） ： [6,6]-phenyl-C61-butyricacid methyl ester （PCBM） 1：1 weight-ratio blend are reported. The effects of various annealing treatments on the device performance are investigated. Thermal annealing shows significant improvement of the device performances. For devices at 130℃ annealing, maximum power conversion efficiency （PCE） of 3.3% and All factor up to 60.3% is achieved under air mass 1.5, 100 m W/cm^2 illumination. We discuss the effect of thermal annealing by the results of ultraviolet-visible absorption spectroscopy （UV-vis）, dark current-voltage curve, atomic force microscopy （AFM）.

A New Synthesis Method of Single Crystalline CuO Nanoribbons

One-dimensional (1D) nanoscale materials (nanotubles, nanorods, nanowires and nanobelts or nanoribbons and so on) are currently of a matter of much interest. Due to their unique properties in electronics, magnetics, optics, and mechanics, they can be used to design and fabricate nanosensors, switches, nanolasers, transistors and other nanodevices[1]. In order to obtain desired one-dimensional materials, many techniques and methods have been developed[2].……