Rare earth elements Ce and La were added into the near-equal atomic titanium-nickel alloy. Differential scanning calorimetry and X-ray diffraction were applied to study the effect of the Ce and La. The results show that adding a small amount of Ce into TiNi alloy can improve the phase transformation obviously, but the phases in TiNi alloy do not change. The results show that adding a small amount of Ce or La can improve the properties of titanium-nickel alloy.

The effect of Cd, Pb stress on the activated oxygen scavenging system indicates that the content of chlorophyll, chlorophyll a/b ratio and the activity of CAT gradually decrease, the activity of SOD increases first and then decreases, and the activity of POD gradually increases with increasing concentrations of Cd and Pb. Between Cd and Pb there is synergism in the activated oxygen scavenging system. The results show that the stress of Cd and Pb can affect the scavenging system of activated oxygen and result in imbalance of activated oxygen metabolism.

用不同浓度Ca（NO3）2·4H2O（0.7、1.4、2.1gCa2+/kg土）对1年生的处在两种NaCl胁迫（10和20g/kg）处理下的木麻黄扦插苗进行化学调控，研究硝酸钙盐加氯化钠处理的木麻黄幼苗的生长量、木麻黄幼苗抗氧化酶系统活性和渗透调节渗透调节物质的含量的变化，研究结果表明：中度NaCl胁迫加硝酸钙处理下的木麻黄扦插苗的可深性的蛋白质含量增加，MDA含量降低说明膜脂过氧化作用减轻，而且抗氧化酶活性（SOD、POD）之间协调变化有利于提高清除自由基的速率，中度盐胁迫下钙盐可以促进木麻黄体内脯氨酸的积累；但重度NaCl胁迫下钙盐对木麻黄的调控作用不显著，重度盐胁迫下钙盐反而降低木麻黄SOD、POD活性和脯氨酸的含量，减弱了抗氧化酶系统对活性氧的清除作用，同时高浓度钙盐还会加重NaCl胁迫对木麻黄幼苗的损伤，这说明适量的钙盐有利于木麻黄幼苗抵抗盐胁迫能力的提高，而高浓度钙盐则可能会加重盐胁迫。

V79-8 is an abnormal cell line which does not have detectable G1 and G2 phases in its cell cycle. This cell line is derived from V79 cell line which has G1 phase but lacks G2 phase. By using an anti-sense approach, CDK4 gene expression was partially inhibited to find whether CDK4 might contribute to the lack of G1 phase in V79-8 cells. Anti-CDK4 anti-sense plasmid was constructed and used to transfect V79-8 cells. Clones of transfected cells (V79-8-asCDK4) were examined, in comparison with V79-8 cells. to determine its growth curve, cell doubling-time (GT), the level of CDK4 gene expression and the levels of expression of some other growth related genes. V79-8-asCDK4 cells showed a slower growth rate with a doubling time 2.5-h longer than that of V79-8 cells. A flow cytometry (FCM) analysis demonstrated that the 2.5h increse of the doubling time of V79-8-asCDK4 cells was mainly due to the appearance of G1 phase because its G2+ M phase was not significantly different from that of V79-8 cells. The decrease of CDK4 gene expression in V79-8-asCDK4 cells was shown by Northern-blot. Changes in the expression levels of the growth-related genes TGF-

The effect of Ce3+ on free cytoplasmic calcium of hepatocytes and V79 cells was studied with microfluorometry. The results show that the free cytoplasmic calcium increases in low dose and increases significantly in high dose of Ce3+. These results suggest that Ce3+ might enhance the influx of Ca2+ and be toxic to hepatocytes in high dose.