This article summarizes processing of preserved g reen bracken in a pH =8.

Basing upon the environment standards for pollution-free vegetable producing areas and the environment standards for green vegetable producing areas,this paper studies the soil environment quality of the 14 important vegetable producing bases in the city of Qinhuangdao,following the single-index and multiindex models.

The sense quality of green vegetable are likely to be effected by the green color,but the green is easy reduced during processing.

Decolor mechanism and color\|fixation methods of green vegetables;

Determination of the nutrion components and pesticide residues of green vegetables North Mountainous region in Jinhua City;

Because of pollution of the vegetables issues,the technical measures of control pollution of the vegetables to produce green vegetables are comprehensively studied.

Study on the Technologic Conditions of Purifying Total Pteridium aquilinum Flavonoids by AB-8 Macro-resin Absorption;

Pre-treatment technology of pteridium aquilinum before quick freezing;

Effects of freezing process on quality of pteridium aquilinum and the change of enzymatic activity;

Study on technique of processing fern packaged with soft materials;

Determination of Copper and zinc in schisandra、arimillaria mellea and fern By Flame Atomic Absorption Spectrophotometry;

γ-aminobutyric acid in fern leaves and stems was extracted by leaking, isolated by column chromatography and guantitatively dctermined by dual wavelength thin layer scanning method.