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Auxiliary fixture for precisely measuring pore sizes
The invention discloses an auxiliary fixture for precisely measuring pore sizes. The auxiliary fixture comprises a fixture body (1), a tightening screw (2), a tightening piece (3) and a spring (4)…
Measuring method for thickness of extremely thin covering layer
The invention discloses a measuring method for the thickness of an extremely-thin covering layer, comprising the following steps of: sampling in a way of being obliquely crossed with a covering layer…
Herbal acne-eliminating cream
Chinese ligusticum as special natural medicinal plant resource is used in developing the herbal acne-eliminating cream with special therapeutic effect on acne bacillus and skin care and has passed through relevant toxicity test and physical and chemical performance test.
New concise asymmetric tatal synthesis of (+)-desoxoprosophylline and prosophylline
Process for synthesizing 5-aminovaleric acid hydrochloride
The invention relates to an efficient novel method for synthesizing photosensitizing agent 5-ketoamine valerate hydrochloride. The method uses compounds of formula (I) and formula (II). In the…
Preparation method of demebeverine hydrochloride
The present invention relates to a preparation method of norfenefrine hydrochloride. In the method, the target compound is prepared from m-hydroxybenzaldehyde as raw materials by addition reaction…