What does iodine value indicate?
The iodine value (IV) indicates the degree of unsaturation of a fat or oil. It is defined as the number of grams of iodine absorbed by 100 g of fat.
What are the properties of fats?
Fats are greasy to touch and leave an oily impression on paper. They are insoluble in water and soluble in organic solvents. Pure triacylglycerols are tasteless, odourless, colourless and neutral in reaction. They have lesser specific gravity (density) than water and therefore float in water.
What is hydrolysis of fats and oils?
The hydrolysis of fats and oils in the presence of a base makes soap and is known as saponification. Double bonds present in unsaturated triglycerides can be hydrogenated to convert oils (liquid) into margarine (solid). The oxidation of fatty acids can form compounds with disagreeable odors.
What are the physical properties of lipids?
Properties of Lipids
- Lipids may be either liquids or non-crystalline solids at room temperature.
- Pure fats and oils are colorless, odorless, and tasteless.
- They are energy-rich organic molecules.
- Insoluble in water.
- Soluble in organic solvents like alcohol, chloroform, acetone, benzene, etc.
- No ionic charges.
What does high iodine value mean?
(Unsaturated compounds contain molecules with double or triple bonds, which are very reactive toward iodine.) The more iodine is attached, the higher is the iodine value, and the more reactive, less stable, softer, and more susceptible to oxidation and rancidification is the oil, fat, or wax.
Is high iodine value in oil good or bad?
Hence, the observed higher iodine value in the locally made oils indicated that they are likely to be healthier for consumption. Studies have recommended to switch from saturated to unsaturated fats because of the risk of cardiovascular disease associated with high consumption of saturated fatty-acids [22–25].
What are the 3 types of fats?
There are four major dietary fats in food:
- Saturated fats.
- Transfats.
- Monounsaturated fats.
- Polyunsaturated fats.
Can lipids be hydrolyzed?
Lipid hydrolysis is usually carried out in the laboratory by refluxing oils and fats with different catalysts [6]. The reaction can be catalyzed by acid, base, or lipase, but it also occurs as an un-catalyzed reaction between fats and water dissolved in the fat phase at suitable temperatures and pressures [7].
What is hydrolysis of triglycerides?
Hydrolysis of triglycerides Triglycerides (fats) can be hydrolyzed to produce glycerol and 3 fatty acids in the presence of acid and heat or with a suitable lipase enzyme under biological conditions. When these fatty acids are neutralized with base they produce carboxylate ions which are used as soaps.
What are the 4 classes of lipids?
The four main groups of lipids include:
- Fatty acids (saturated and unsaturated)
- Glycerides (glycerol-containing lipids)
- Nonglyceride lipids (sphingolipids, steroids, waxes)
- Complex lipids (lipoproteins, glycolipids)
How much does a vintage Hohner harp cost?
Vintage M. Hohner “THE ECHO HARP” 55/80 CG Double Sided Harmonica – Germany THE ECHO HARP, IN EXCELLENT CONDITION, WITH. $23.95. Brand: HOHNER $4.95 shipping. Key: C Watch. VINTAGE HOHNER MARINE BAND HARMONICA A440 KEY OF A with BOX This is in very good condition, with only wear to the outer box.
How old is this Hohner harmonica?
This extremely popular model has been manufactured by Hohner since 1925. The age of this particular harmonica is unknown, but it appears to be fairly old.
How big is a M Hohner Echo bell metal reeds double sided harmonica?
Selling a vintage M. Hohner Echo Bell Metal Reeds Double Sided Harmonica. Measures approx. 6 3/4″ long and 2″ wide. Made in Germany! LOW OPENING more BID PRICE! PLEASE CHECKOUT MY OTHER LISTINGS! The Echo Harp Hamonica M. Hohner Germany G/C Original Box Read! VINTAGE M. HOHNER THE ECHO HARP HARMONICA 56/96 M 2 KEY C/G 2 SIDED TREMOLO!
Are these 1940’s Hohner Koch Chromatic harmonica keys any good?
These 1940’s Hohner Koch Chromatic Harmonica Key of C 980/40& Echo Harp (Made In Germany) are in great condition! They both work very well and have a nice sound. Please keep checking my listings my family is selling their estate this coming summer and there’s so much to clean out. Please feel free to ask questions.