Specific Surface Areas of Milk Powders Produced by Different Drying Methods
Open Access
- 1 February 1964
- journal article
- research article
- Published by American Dairy Science Association in Journal of Dairy Science
- Vol. 47 (2) , 132-138
- https://doi.org/10.3168/jds.s0022-0302(64)88605-7
Abstract
Low-temperature (-195 C) adsorption of N2 was used to study the physical surface features of whole and skimmilk powders produced by different drying technics. Specific surface areas were calculated using the Brunauer-Emmett-Teller (BET) multilayer adsorption theory. All the milk powders exhibited rather low surface areas ([image].1-.6 m2/g) and abnormally low values for the energy of adsorption of N2. Comparison of these surface areas with those obtained by permeametry yielded information on the relative porosities of the various powders. Conventional spray- dried powders were less porous than the instantized powders and the spray-dried foams. The surface areas of several milk constituents (lactose, [alpha]-lactalbumin, [beta]-lactoglobulin and Na-[alpha]-caseinate) were measured.This publication has 14 references indexed in Scilit:
- Influence of Drying Methods on Density and Porosity of Milk Powder GranulesJournal of Dairy Science, 1963
- Production and Properties of Spray-Dried Whole Milk FoamJournal of Dairy Science, 1962
- Dry Whole Milk. I. A New Physical FormJournal of Dairy Science, 1957
- Crystalline α-Lactalbumin: An Improved Method for Its Isolation. Sulfur DistributionJournal of the American Chemical Society, 1954
- Separation of α-, β- and γ-CaseinJournal of Dairy Science, 1952
- Surface Area Measurements of Activated Carbons, Silica Gel and other AdsorbentsJournal of the American Chemical Society, 1945
- Quantitative Determination of Alpha and Beta Lactose in dried Milk and Dried WheyJournal of Dairy Science, 1941
- A Sensitive Contact IndicatorReview of Scientific Instruments, 1941
- On a Theory of the van der Waals Adsorption of GasesJournal of the American Chemical Society, 1940
- Adsorption of Gases in Multimolecular LayersJournal of the American Chemical Society, 1938