Objective To study the anti-tumor effects of alcohol extraction of Coix stalk objects on H22 tumor-bearing mice. Methods The animal model of tumor bearing mice with H22 ascitic tumor cells was established. Eighty-four model mice were randomly and equally divided into Coix stalk extract groups 1-5 (10, 8, 6, 4 and 2 g/kg), model control group and cyclophosphamide group. Mice were treated orally with Coix stalk alcohol extraction solution (10, 8, 6, 4 and 2 g/kg), cyclophosphamide 0.02 g/kg and normal saline once a day for 8 days for Coix stalk extract group, cyclophosphamide group and model control group. The mouse activity, the size and the appearance of time of abdominal swelling, and changes of hair, feeding and drinking water quantity were observed in groups of mice. The solid tumor mass was measured in H22 tumor-bearing mice. The tumor inhibitory rate, liver index, spleen index and thymus index were calculated. Results The axillary tumor muster was found first in model control group with the fastest growth, reduced independent activity, decreased appetite and dim in hair color, followed by the Coix stalk extract group 1 and group 2. The last was Coix stalk extract group 5 and cyclophosphamide group. The solid tumor mass were (0.47±0.18), (0.37± 0.13), (0.34±0.10), (0.30±0.11) and (0.28±0.09) mg for Coix stalk alcohol extract groups 1-5, which were significantly lower than those of model control group (0.60 mg±0.21 mg, F=5.700,P<0.05). The tumor inhibition rates were 21.67%, 38.33%, 43.33%, 50.00%, 53.33%and 60.00%in Coix stalk extract groups 1-5 and cyclophosphamide group. The liver index, spleen index and thymus index were lower in cyclophosphamide group and Coix stalk alcohol extract groups than those of model control group (except for the spleen index of Coix stalk extract group 1). The liver index was lower in Coix stalk ethanol extract groups than that of cyclophosphamide group. There were no significant differences in the spleen index, thymus index between Coix stalk ethanol extract groups and cyclophosphamide group. Conclusion Coix stalk alcohol extract has inhibitory effects on the tumor and liver damage in H22 mice.

Objective To comparatively study the advantage and disadvantage of different polysaccharide extraction methods of enzymatic extraction,ultrasonic extraction and a combination of these two processes.Methods The enzymatic extraction and ultrasonic extraction were first optimized by orthogonal design and then compared with the effect of combination.Results From the results of three extraction techniques,enzymatic extraction of Talinum crassifolium polysaccharide's average extraction rate was 17.45％,ultrasonic extraction was 20.01％,enzyme-ultrasonic extraction was 20.74％.Conclusion The combined optimum preparative procedure of Talinum crassifolium is simple,quickly and high efficient.

OBJECTIVE：To evaluate in vitro antioxidant activities of 4 different polar parts of ethanol extract from Amomum tsao-ko，and to lay a foundation for the research and development of antioxidant chemical components in the plant. METHODS ： The dried fruits of A. tsao-ko were crushed ，then were hearted and reflux extracted with 95％ ethanol. The extraction fluid was concentrated by rotary evaporation and evaporated in water bath to obtain the ethanol extract. The extract was dispersed in water ， and then extracted with petroleum ether ，ethyl acetate and n-butanol organic solvents one by one. Each solvent extract was combined and the lower water phase were collected. Finally ，the petroleum ether part ，ethyl acetate part ，n-butanol part and water part were obtained，after rotary evaporation concentration and water bath evaporation. Through in vitro antioxidant activity tests ，using 2， 6-di-tert-butyl-4-methylphenol（BHT）as positive control ，DPPH radical ，superoxide anion radical scavenging ability and Fe 3+ reducing ability of different polar parts of ethanol extract from A. tsao-ko were investigated. RESULTS ：The scavenging rates of 4 polar parts of ethanol extract from A. tsao-ko on DPPH radical were all over 80％；the order of scavenging ability was ethyl acetate part＞BHT＞n-butanol part ＞petroleum ether part ＞water part. Those of the 4 polar parts to superoxide anion radical were between about 30％-40％ mostly；the order of scavenging ability was n-butanol part ＞petroleum ether part ＞water part ＞ethyl acetate part ＞ BHT；but those were weaker than their scavenging ability to DPPH r adical. The polar parts of ethanol extract also had a certain reduction ability to Fe 3+；the order of the reduction ability was n-butanol part ＞BHT＞ethyl acetate part ＞petroleum ether part ＞ water part on the whole ，but that of water part rose to the stron- gest when its concentration was 4.0 μg/mL. CONCLUSIONS： The different polar parts of ethanol extract from A. tsao-kom have certain in vitro antioxidant capacity ，but the order of antioxidant activity of different polar parts was not the same in different antioxidant activity tests ；ethyl acetate part has the 163.com strongest scave nging effect on DPPH radical ，n-butanol part has the strongest scavenging ability on superoxide anion radical and reducing ability on Fe 3+.