Lipids Flashcards
(111 cards)
Consists of fixed oils, fats and waxes
lipids
Lipids are also known as
lipins or lipoids
Esters of long chain fatty acids and alcohols, or of closely related derivatives
lipids
primary function of lipids are
food (energy) storage
liquid at normal room temperaure
Fatty or fixed oil liquid
semi-solid or solid at ordinary temperature
Fats
Fatty or fixed oils- Liquid at normal room temperature EXCEPT
coconut oil
Fats- semi-solid or solid at ordinary temperature EXCEPT
Cod liver oil
The number of milligrams of potassium hydroxide required to neutralize the free fatty acids in 1 g of the substance
ACID VALUE OR ACID NUMBER
The number of milligrams of potassium hydroxide required to neutralize the free fatty acids and saponify the esters contained in 1 g of the substance
SAPONIFICATION VALUE
The number of grams of iodine absorbed, under prescribed conditions, by 100 grams of substance
IODINE NUMBER
Indicates the degree of unsaturation
IODINE NUMBER
Other physical constants such as:
- Melting Point
- Specific Gravity
- Refractive Index
Fixed oils and fats of vegetable origin are obtained by expression in
hydraulic presses
if the expression is carried out in cold
Virgin oil or a cold- pressed oil
if the expression is carried out in heat
Hot pressed oil
True or false
Seeds contain the larger quantities of fats and oils than other plant parts.
True
the glycerides of unsaturated fatty acids are liquid or solid?
liquid
glycerides of saturated fatty acids of sufficient length are liquid or solid?
solid
some of the more common fatty acids are:
CALAMYPASTAR
Caproic Caprylic Capric Lauric Myristic Palmitic Stearic Arachidic
CLASSIFICATION OF FIXED OILS BASED ON ABILITY TO ABSORB OXYGEN FROM THE AIR
- Drying oils
- Semidrying oils
- Nondrying oils
Produces semisolid fats that are extensively used as cooking fats and shortenings
HYDROGENATION OF THE OIL
obtained by reacting sulfuric acid with the oil, keeping the temperature down by chilling
SULFATED OR SULFONATED OILS
Fixed oil obtained by expression or extraction from the seed kernels of the coconut palm
COCONUT OIL