The Eco-city Planning of old Districts in Lanzhou;

Seasonal variation characteristics of element concentration of street dust in Lanzhou;

Investigation of Household Drinking Water in Lanzhou City;

Investigation on the seed plant flora of the wetland along the Yellow River in Lanzhou City;

Research on current condition and developing countermeasure of community sports in Lanzhou City;

Study on the Timing of Lanzhou City Leapfrog Development from the Space Perspective;

To learn its general toxic effect on animal body, the present research evaluated the safety of the Chinese herbal Yucca through the acute toxicity experiments on mice and the sub-chronic toxicity on rats.

A review with 15 references, yucca extract has potential as feed additive for lower piggery environmental pollution and higher pigs growth performance.

Effect of microwave curing on the filling power and taste quality of cut tobacco;

At present,the researches on the mass and heat transfer mechanism of cut tobacco are in the static process.

Combustible materials(tobacco leafs,stems,cut tobacco and conveyor belts) in primary processing line were tested to investigate their fire behaviors,such as the ignition temperature,the mass loss rate of combustion,the oxygen index and the flame spread speed in horizontal.