Cereal Grains : Laboratory Reference and Procedures Manual by Sergio O. Serna-Saldivar

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By Sergio O. Serna-Saldivar

Actual and Morphological homes of Cereal GrainsDetermination of actual houses of Cereal GrainsDetermination of Grade and ClassMacromorphology and Micromorphology of Cereal Grains decision of Chemical and dietary houses of Cereal Grains and Their ProductsProximate CompositionMethods for Moisture AnalysisMethods for Mineral AnalysisMethods for Nitrogenous Compound AnalysisMethods for fat and Read more...

summary: actual and Morphological houses of Cereal GrainsDetermination of actual homes of Cereal GrainsDetermination of Grade and ClassMacromorphology and Micromorphology of Cereal Grains selection of Chemical and dietary homes of Cereal Grains and Their ProductsProximate CompositionMethods for Moisture AnalysisMethods for Mineral AnalysisMethods for Nitrogenous Compound AnalysisMethods for fat and Oils AnalysisMethods for Fiber AnalysisMethods for Nonfibrous Carbohydrate AnalysisVitamin research equipment for Ph and Acidity AnalysisMethods for Nutraceutical Compounds AnalysisI

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4 Subjective determination of ratio of soft to hard endosperm on a light box. (a) Kernels viewed on a light box; (b) kernels with different endosperm textures. is commonly used to indirectly determine grain hardness especially of coarse grains (maize and sorghum). The procedure simply consists of subjecting samples to the abrasive mechanical action of the mill for a certain time. Hard- and soft-textured grains lose less and more dry matter, respectively, during the fixed and standardized milling procedures.

Procedure 1. Divide the lot of grain using the Boerner divider. 2. Select and weigh 200 g to 250 g of the cereal. 3. Manually separate damaged kernels into the following categories: a. Heat-damaged. Recognized by the darker coloration compared with sound or healthy counterparts. b. Insect-damaged. Recognized by visual perforations and the presence of live insects or web-like material. c. Germ-damaged or black tip. Kernels that have a dark or black germ that is not viable. d. Sprouted kernels. Recognized by the presence of rootlets and, in some instances, acrospires.

4. Multiply the resulting weight by 10 to obtain the 1000 kernel weight in grams. Calculate the average kernel weight in milligrams. ) contaminating a particular lot of grain. For obvious reasons, dockage greatly affects the grading and market value of the grain. The amount of foreign material is inversely related to product yield. Grains with higher dockage contents imply a higher management cost because kernels will require cleaning before storage. Furthermore, if the amount of foreign material is too high, the price is penalized because the grain will be more prone to deterioration during storage.

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