(2) Potassium dichromate
(3) Acetobacter, alcohol, sugar, high-pressure steam plate scribing method, dilution coating plate method? 30 ~ 35℃ Is it necessary? The inversion of the plate can prevent the condensed water drops on the Petri dish cover from falling into the culture medium and causing pollution.
(4) The nature and use, temperature and time of the extractant.
Health-preserving soup has always been the nutrition of women. Women are prone to lack of qi and blood and have a poor complexion. So what health soup shou