Effects of Four Chemical Regulators on Chilling Tolerance and Photosynthetic Characteristics of Tobacco Seedlings PRESERVATION EFFECT OF ESSENTIAL CLOVE LEAF OIL AND ITS MIXTURE WITH CHITOSAN AND CALCIUM CHLORIDE ON DANGSHAN PEAR Effect of Calcium and Gibberellin mixture on drought resistance of soaked rice seed during germination and young seedlings Preparation technology of tanshinone sustained-release microcapsules Study on the new method of fast staining for sodium dodecyl sulfate-polyacrylamide gel electrophoresis Effects of Calcium Chloride and Magnesium Sulphate on the Propagation in Vitro of Chinese Fir 1-Methylcyclopropene and CaCl2 Treatments Affect Lipolytic Enzymes in Fresh-cut Watermelon Fruit PROMOTING EFFECTS OF CALCIUM ON PHOTOSYNTHESIS OF TOBACCO SEEDINGS UNDER CHILLING AND HIGH LIGHT ACCLIMATION Preparation technology of tanshinone sustained-release microcapsules