ether extract
What is ether extract?
The ether is then evaporated from the fat solution. The resulting residue is weighed and referred to as ether extract or crude fat. Both the ether and the samples must be free of moisture to avoid coextraction of water-soluble components in the sample such as carbohydrates, urea, lactic acid, glycerol, etc.
What is the difference between ESC and ether extract?
ESC includes primarily monosaccharides and disaccharides. Ether Extract: Ether extract is a portion of dry matter extracted with ether. It is a laboratory test to approximate the total fat (or crude fat) content of a feed and includes some waxes, pigments and other lipids to a minor degree in addition to true fats.
How is diethyl ether produced?
Most diethyl ether is produced as a byproduct of the vapor-phase hydration of ethylene to make ethanol. This process uses solid-supported phosphoric acid catalysts and can be adjusted to make more ether if the need arises. Vapor-phase dehydration of ethanol over some alumina catalysts can give diethyl ether yields of up to 95%.
Can petroleum ether be substituted for diethyl ether?
Low temperatures are used to evaporate the ether and remove residual moisture to prevent oxidation of the fat. Petroleum ether does not dissolve all of the plant lipid material, and therefore it cannot be substituted for diethyl ether. Anhydrous Diethyl Ether, purified for fat extraction Mallinkrodt #0844 or equivalent.
Moisture
Dry Matter (DM):Dry matter is the moisture-free content of the sample. Because moisture dilutes the concentration of nutrients but does not have a major influence on intake (aside from severe deprivation), it is important to always balance and evaluate rations on a dry-matter basis. Digestible Dry Matter (DDM):Calculated from acid detergent fiber (
Protein
Crude Protein (CP):Crude protein measures the nitrogen content of a feedstuff, including both true protein and non-protein nitrogen. In ruminants, evaluation of the fraction that is degradable in the rumen, degradable intake protein (DIP), versus the rumen-undegradable fraction, undegradable intake protein (UIP), is also important. However, the rum
Fiber
Crude Fiber (CF):Crude fiber is a traditional measure of fiber content in feeds. Neutral detergent fiber (NDF) and acid detergent fiber (ADF) are more useful measures of feeding value, and should be used to evaluate forages and formulate rations. Neutral Detergent Fiber (NDF):Structural components of the plant, specifically cell wall. NDF is a pred
Energy
Total Digestible Nutrients (TDN):The sum of the digestible fiber, protein, lipid, and carbohydrate components of a feedstuff or diet. TDN is directly related to digestible energy and is often calculated based on ADF. TDN is useful for beef cow rations that are primarily forage. When moderate to high concentrations of concentrate are fed, net energy
Example
See more examples This hay is 14.4% moisture and 85.6% DM. For ration formulation you should always used the dry matter composition. The DM composition can be found by dividing as-is value by the percent DM. For example: 19.8% CP as-is ÷ 0.856 = 23.2 % CP on a DM basis Because the heat damaged protein is not 10% or more of the CP, the ACP is the sa
Practical#11
Ether naming and introduction Organic chemistry Khan Academy
13.2 Synthesis of Ethers Organic Chemistry
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8. Crude Fat (Ether Extract) in Forages
15 août 2020 Fat (Crude) or Ether Extract in Animal Feed. (920.29) Official Methods of Analysis. 1990. Association of. Official Analytical Chemists. 15th ... |
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A Study of the Ether Extract of the Materials Estimated as Fat in the
The flask was weighed immediately and the contents subjected to ether extraction. Method II: The Babcock test bottle neck was plugged with a rubber stopper |
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Evaluation of methods for the quantification of ether extract contents
The petroleum ether was used for both extraction methods to avoid confounding associated with using different solvents. For the Randall method evaluations |
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Crude Fat Methods – Considerations
fraction is defined by the solvent and the extraction conditions (time temperature |
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Ether extract and acid detergent fibre but not glucosinolates are
30 juil. 2020 Ether extract and acid detergent fibre but not glucosinolates are determinants of the digestible and metabolizable energy of rapeseed meal ... |
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AN ETHER EXTRACTION METHOD FOR THE DETERMINATION
by continuous ether extraction of urine at different pH levels. In this manner the more truly phenolic bodies are separated from the ether-. |
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NOTES ON THE ETHER EXTRACT OF FECES
nature with the ether extract of the feces or as it is ordinarily called |
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Antimicrobial Activity of Methanolic Extract and Ether Extract of
10 mars 2016 the present study we compared the antimicrobial potential of its ether extract and methanolic extract with ciprofloxacin. |
| REPORT ON CRUDE FAT OR ETHER EXTRACT |
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Evaluation of methods for the quantification of ether extract - SciELO
The ether extract (EE) have heterogeneous composition and is formed by lipids ( galactolipids, triglycerides and phospholipids) and all other non-polar compounds |
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NOTES ON THE ETHER EXTRACT OF FECES - ScienceDirect
One is whether the usual method of extracting feces with ether involves any serious error because of the presence of fatty soaps; the other is, how the fat of the diet |
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AN ETHER EXTRACTION METHOD FOR THE - ScienceDirect
made up of ether-soluble phenolic compounds In the present work, 1 cc portions of 10 N sulfuric acid added, and then ether extraction and phenol analysis |
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Crude Fat or Ether Extract in Meat and Meat Products* - Oxford
When dry, place thimble in extraction apparatus, rinse fat from beaker into extraction flask with solvent, and extract sample for 4 hours in the usual manner 2 |
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REPORT ON CRUDE FAT OR ETHER EXTRACT - Oxford Academic
We are convinced, from the results of this work that the official method of extraction with ethyl ether gives erroneous results where feeds contain urea, and that |
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Estimation of ether extract using Soxhlet apparatus - Dairy
The crude fat present in the feed is extracted by petroleum ether using the soxhlet apparatus Apparatus • Spatula • Weighing balance • Thimble • |
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The Total Fatty Acids and Other Ether-Soluble Constituents - CORE
the determination of fat in feces in which the ether extract is saponified with alcoholic potash, the chloresterol removed from the soap with ether, and fatty acids |
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THE ETHER EXTRACT AND THE CHLORO FORM - CORE
THE ETHER EXTRACT AND THE CHLOROFORM EXTRACT OF SOILS (t S F liA P S, Chemist J B R a t h e r , Assistant Chemist and some other substances |
