Changes In Freezing Research Articles

Predicting Temperature Changes in Freezing of Citrus Sections Contained in Steel Drums

ABSTRACT GRAPEFRUIT sections commercially packed in standard drums (1.56 m^) suitable for shipment were frozen in a 22 C cold room. The time-temperature histories at both the inner wall and center of the cylindrical container were measured. The data are useful in controlling the growth of yeast and other microorganisms. The time required to freeze the product to 2 C of the room temperature were determined for a specific set of conditions. A simplified Fourier's heat conduction equation was solved by a finite difference method. The thermophysical properties were estimated based on the Mollier diagram for fruit and vegetable juices experimentally established by Riedel (1951). The Mollier diagram is considered to be applicable for fresh fruits as well as concentrated products. The numerical solutions obtained by the simplified method appear to fit the measured data with reasonable accuracy. The predicted patterns are in good agreement with the results for other products reported in the literature (e.g. Hsieh et al. 1977). The mathematical models are capable of predicting the effects of variations of processing parameters.

Storage behaviour of freeze dried fruit juice powders

SummaryThe stability of nutrients and chemical changes in freeze dehydrated juice powders based on a few of the locally available fruits, during storage at ambient temperature (24‐28°C) and also at 37°C were studied. Single strength juice and ready‐to‐serve beverages, fortified with sugar to raise the brix to 15 and 20 respectively prepared from these fruits were taken for freeze drying and further storage studies. the sugar fortified juice powders of 15° and 20° brix had a longer shelf life compared to their single strength counterpart. of the two varieties of mango studied, Badami had a longer shelf life compared to Raspuri. Comparing mosambi, pineapple and mango, mosambi retained maximum amount of ascorbic acid at both the temperatures.

Insulin, free fatty acids, and stimulation of hepatic gluconeogenesis during fasting.

ARTICLESInsulin, free fatty acids, and stimulation of hepatic gluconeogenesis during fastingRJ Schimmel, and E KnobilRJ Schimmel, and E KnobilPublished Online:01 Jun 1970https://doi.org/10.1152/ajplegacy.1970.218.6.1540MoreSectionsPDF (2 MB)Download PDF ToolsExport citationAdd to favoritesGet permissionsTrack citations ShareShare onFacebookTwitterLinkedInWeChat Previous Back to Top Next Download PDF FiguresReferencesRelatedInformation Cited ByFastingStarvation and refeeding in Japanese quail. I. Biochemical and molecular adjustments in bloodBolletino di zoologia, Vol. 55, No. 1-4Determination of free fatty acids in irradiated tuna loins on storageInternational Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, Vol. 37, No. 3In Vitro Hepatic Gluconeogenesis and Ketogenesis as Affected by Prolonged Ketonemia-Glucosuria and Fasting in SteersJournal of Dairy Science, Vol. 67, No. 10Free fatty acids in irradiated hake filletsThe International Journal of Applied Radiation and Isotopes, Vol. 35, No. 9Liver glucose, glycogen and lipid synthesis in fed and 24-hour fasted rats soon after a pulse of [3-14C]pyruvate through the portal veinInternational Journal of Biochemistry, Vol. 15, No. 1Chemical methods for measuring changes in freeze stored fish: A reviewFood Chemistry, Vol. 11, No. 2A possible hepatic factor in the control of plasma free fatty acid levelsMetabolism, Vol. 31, No. 6Gastrointestinal and metabolic consequences of a rat's meal on maintenance diet ad libitumPhysiology & Behavior, Vol. 27, No. 5FISH MUSCLE LIPOLYSIS?A REVIEWJournal of Food Biochemistry, Vol. 5, No. 2Plasma levels of amino acids in humans, pigs and rats and their changes during liver transplantation in the pigComparative Biochemistry and Physiology Part A: Physiology, Vol. 70, No. 3Effect of short term fasting on plasma composition of lactating rats26 September 2008 | Archives Internationales de Physiologie et de Biochimie, Vol. 89, No. 3An investigation of gluconeogenesis in marine teleosts, and the effect of long-term exercise on hepatic gluconeogenesisComparative Biochemistry and Physiology Part B: Comparative Biochemistry, Vol. 67, No. 4Effect of insulin on incorporation of 14C-labeled pyruvates and bicarbonate into blood glucose of fasted mice.S Rous1 July 1978 | American Journal of Physiology-Endocrinology and Metabolism, Vol. 235, No. 1Fructose-1,6-diphosphatase deficiency, hypoglycemia, and response to folate therapy in a mother and her daughterBiochemical Medicine, Vol. 19, No. 2Adenosine 3′,5′cyclic monophosphate in adipose tissue of diabetic ratsBiochimica et Biophysica Acta (BBA) - General Subjects, Vol. 451, No. 2Ontogeny and insulin-dependence of the satiation which follows carbohydrate absorption in the ratBehavioral Biology, Vol. 15, No. 2A new salting-out technique for colorimetric free fatty acid assaysAnalytical Biochemistry, Vol. 67, No. 2A permutation test for periodicities in short, noisy time seriesAnnals of Biomedical Engineering, Vol. 3, No. 2Enzymes of carbohydrate and fat metabolism in anti-insulin serum diabetes; inactivation by free fatty acids and the protective effect of cellular proteinDiabetologia, Vol. 10, No. 6Effect of Nicotinamide on Carbohydrate Metabolism in the Rat Liver during StarvationEuropean Journal of Clinical Investigation, Vol. 3, No. 6Gluconeogenesis in jejunal mucosa of guinea pigBiochimica et Biophysica Acta (BBA) - General Subjects, Vol. 304, No. 2GluconeogenesisMetabolism, Vol. 21, No. 10 More from this issue > Volume 218Issue 6June 1970Pages 1540-1547 Copyright & PermissionsCopyright © 1970 by American Physiological Societyhttps://doi.org/10.1152/ajplegacy.1970.218.6.1540PubMed5446280History Published online 1 June 1970 Published in print 1 June 1970 Metrics