Qualitative Changes in Birch Sap after Freezing and Thawing-Reference-Cited by-同舟云学术

Qualitative Changes in Birch Sap after Freezing and Thawing

Published:2024-05-03 Issue:5 Volume:15 Page:809
ISSN:1999-4907
Container-title:Forests
language:en
Short-container-title:Forests

Author:

Mingaila Justas¹,Vilimas Vladas²,Viškelis Pranas³⁴^ORCID,Marozas Vitas⁵,Bobinas Česlovas³,Viškelis Jonas³⁴^ORCID

Affiliation:

1. Lithuanian Agricultural Advisory Service, Stoties Str. 5, Kėdainiai District, 58343 Akademija, Lithuania

2. Faculty of Engineering, Agriculture Academy, Vytautas Magnus University, K. Donelaičio Str. 58, 44248 Kaunas, Lithuania

3. Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, Kaunas Str. 30, Kaunas District, 54333 Babtai, Lithuania

4. Botanical Garden, Vytautas Magnus University, K. Donelaičio Str. 58, 44248 Kaunas, Lithuania

5. Faculty of Forest Sciences and Ecology, Agriculture Academy, Vytautas Magnus University, K. Donelaičio Str. 58, 44248 Kaunas, Lithuania

Abstract

In this study, the qualitative changes in raw birch sap after freezing and thawing were determined. Ten-liter bottles and one-ton plastic containers with six replications were used for the freezing of birch sap and thawing of frozen sap. During and after the thawing, the physical and physical–chemical properties of the sap were measured. According to the results, as the ice melts, the concentration of acids and other soluble substances in the sap decreases, but changes in qualitative indicators indicate the beginning of fermentation processes through color changes and pH as the temperature of the melting sap becomes positive. As a result, to freeze raw sap in large-volume containers, it is necessary to develop fast thawing technology using auxiliary means—circulation, external energy sources, and mechanical ice crushing.

Funder

Vytautas Magnus University Agriculture Academy

Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture

Publisher

MDPI AG

Link

https://www.mdpi.com/1999-4907/15/5/809/pdf

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