Changes the mechanical timer of Type 420B boiling sterilizer into an electronic timer and adds a display circuit so as to make its timing ocular,operation stable and maintenance easy.

A Method for Observing Epidermis Stoma by Boiling and Tearing Epidermis from Leaf;

In addition to CIP and hot water preparation,mash temperature rise and wort temperature rise and wort boiling consumed most of heat energy in beer brewing.

The prolonging of b oi ling time and the enhance of boiling temperature could decrease the content of c oncretionary nitrogen in wort but would increase wort colority on the other hand .

Discussion on relevant problems during wort boiling;

In this paper several methods of saving energy in wort boiling and of recover- ing heat are introduced and comparisons are made among them.

For the boiling device in heat exchangers, the structure of the cone reducer on shells is adopted on the basis of new standards.

The result shows it is not suitable for the alcohol-testing(75%,V/V) to take the place of the boiling testing and acidity measuring,as there is no parallel relationship among alcohol testing,boiling testing and acidity measuring still needed.