By use of caustic washing electrofining method to decrease the acidity of straight run diesel oil,serious diesel oil emulsification problem can occure often.
A method for fluorophotometric assay of dihydrofolate reductasc (DHFR) activity by the use of fluorescence properties of dihydrofolate (DHFA) and NADPH was developed.
The RE impurities in 4N lutecium oxide are determined by ICP-AES in this paper.The effects of matrix concentration acidity on tested element are analysed.
Assaying respectively the turbidity, acidity saccharometer degree, active protein, and active polyphenolics has beenstudied on the effects of enzymic process on the turbidity of apple juice.