Accession Number:

AD0874906

Title:

Investigation on the Formation of Needle Frost. II,

Descriptive Note:

Corporate Author:

COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH

Personal Author(s):

Report Date:

1970-01-01

Pagination or Media Count:

14.0

Abstract:

The report selects different types of easily-accessible colloids and tests to see whether they had any effect on the formation of needle frost. For example, about 20 different types including silicic anhydride gel, active carbon powder, dye, agar-agar, gelatin, soap gel, albumin are used. Test results are divided into those having an effect on the generation of needle frost, and those which did not. However, an interesting common phenomenon occurred in all of these substances when water was added and they were frozen, regardless of whether they had any influence on the production of needle frost. When they were frozen and ice was produced, the water accumulated and formed large crystals. For this reason we set aside the scattered particles. For example, clay forms mutual layers with the clay which had not yet frozen with ice. In the case of agar-agar, we obtained the same phenomenon from gelidium jelly as we do when making agar-agar. Author

Subject Categories:

  • Snow, Ice and Permafrost

Distribution Statement:

APPROVED FOR PUBLIC RELEASE