Studies on preservation of ayungin (Mesopristes plumbea Kner): rate of drying and equilibrium moisture

Date

7-1966

Degree

Bachelor of Science in Agricultural Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Antonio D. Bustrillos

Co-adviser

Julian Banzon

Abstract

The rates of drying in the sun and shade were deter-mined using "bithay," galvanized iron sheet (GI sheet) and newspaper as containers. Results showed that average rates of drying in the shade were fastest for samples con.. tained on "bithay" followed by those on newspaper and GI sheet. Drying in the sun was fastest in samples dried on GI sheet followed by those on "bithay" and newspaper. The percentages of moisture losses were, generally, faster in the sun than shade drying at a given time using the same containers. One determination using newspaper as container showed that shade drying was better than sun drying when there was a very low percentage of sunshine when sun drying was conducted (fig. 3). Three samples for each class of pre-dried samples were used to determine the equilibrium moisture. Weights at equilibrium moisture were attained between 2 to 4 days depending on humidity control and class of sample used. The percentage of equilibrium moisture increased with increase in relative humidity. It was slightly higher in class 1 sample (40-45 per cent moisture loss by fresh weight) than in class 2 samples (70-75 per cent moisture loss by fresh weight) as the same relative humidity.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1966 A13 L53

Document Type

Thesis

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