Lipids Flashcards
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
Scientific name of coconut oil
Cocos nucifera Linne
Consist of a mixture of triacylglycerols in which 80 to 85% of the acids are saturated. Semisolid
at 20°C
COCONUT OIL
major fatty acids
Lauric and myristic
It is one of the world’s most widely consumed edible oils, next only to soybean oil
PALM OIL
This oil consists of mixture of triacylglycerol whose component acids are almost equal proportions of saturated and unsaturated fatty acids.
PALM OIL
Obtained as a minor product during processing of oil palm fruit.
PALM KERNEL OIL
Characterized as a hard oil and closely resembles coconut oil with which it is easily interchangeable
PALM KERNEL OIL
Castor bean or castor oil seed is the ripe seed of
Ricinus communis
Castor seeds contain __ of fixed oil
45- 55%
True or false
RICIN is removed by extraction of the castor oil and do not remains in the oil cake
false
is a pale yellowish or almost colorless, transparent viscid liquid. It has a faint mild odor and bland characteristic taste
Castor oil
castor oil exert __ effect
cathartic effect
Just read :)
USES and Dose - castor oil
o stimulant cathartic at 15- 60 ml
o used externally for emollient effect and a plasticizer in flexible collodion
o employed in the manufacture of soaps and as a lubricant for internal combustion engines
o Hydrogenated castor oil is used as stiffening agent in some pharmaceutic formulations
o Ricinoleic acid is an ingredient in a vaginal jelly for restoration and maintenance for vaginal acidity.
Olive oil is a fixed oil obtained from the ripe fruit of _.
Olea europea Linne
obtained by gently pressing the peeled pulp with grater pressure
Virgin oil
is pressed from crushed pulp with less pressure
First Class or First Grade of edible oil
is pressed from crushed pulp with greater pressure
Second Grade of edible oil
the pulp is extracted with Carbon Disulfide to obtain “Sulfur” Olive oil of inferior quality
Technical oil
Olive oil is miscible wih __, ___, __, and slightly soluble in __
ether, carbon disulfide, and chloroform
alcohol
Just read :)
Olive oil uses
USES:
Classed as pharmaceutic aid
o Used as setting retardant for dental cements and in the preparation of soaps, plasters and liniments
o It is also a demulcent
o Emollient
o Laxative
o Used as nutrient and widely used as salad oil