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What is mayonnaise-emulsion

What is mayonnaise-emulsion

mayonnaise is a thick creamy semisolid preparation which is used as a food preparation.

Mayonnaise is a water in oil emulsion in which yolk is act as emulsifier.Mayonnaise contains not less than 65 percent by weight of vegetable oils commonly mayonnaise is mixture of egg ,vinegar oil ans spices.

Now a days egg free mayonnaise are also available in market

Mayonnaise is a emulsion which is made up of following ingredients:

vegetable oils
egg yolk
acidifying agent lemon juice or vinegar
mustard

Stability of mayonnaise is depend upon following factor:

Emulsifying agent
Volume
Viscosity
method of mixing
degree of agitation
Temperature

Difference between Emulsion and Suspension
Definition of Emulsion, Types of Emulsion
Application of Emulsion
Pharmaceutical industry and Emulsion
HLB Scale and Emulsifying Agent
Emulsifier or emulsifying agent and emulsion

Definition, Types of Emulsion

Definition, Types of Emulsion

An emulsion is defined as thermodynamically unstable heterogeneous system in which two or more immiscible liquids dispersed into the second continues phase which stabilize with emulsifying agent.

Emulsion Contain:

Internal phase (Dispersed Phase)

External phase (Continuous phase)

Emulsifying agent or emulsifier

Types of emulsion

Primary emulsion

Water in Oil emulsion (W/O emulsion):

W/O is emulsion in which continuous phase is oil and droplets of water dispersed in the oil phase (continuous phase)

Oil in water emulsion (O/W emulsion):

Oil in water is emulsion in which continuous phase is water and droplets of oil dispersed in the water phase.

Water in water emulsion (W/W emulsion):

Water in water emulsion is emulsion in which droplets of aqueous is dispersed in water phase. It mainly contains incompatible polymers.

Oil in Oil emulsion (O/O emulsion):

Oil in oil emulsion in which droplets of oil droplets dispersed in oil phase.

Multiple emulsions:

Multiple emulsion means emulsion in emulsion. Multiple emulsion is complex system in which emulsion is dispersed in one continuous phase. It contains two internal phases It also known as a liquid membrane system

Types of multiple emulsions:

O/w/o emulsion:

Oil in water in oil system where aqueous phase separates the internal and external phase. in oil in water in oil emulsion water droplets surrounded in the oil phase, which is true encloses one or more oil droplets

W/o/w emulsion:

In water in oil in water system, hydrophobic phase separates internal and external aqueous phase. Water in oil in water in oil emulsion system in which oil droplets surrounded by an aqueous phase which oil droplets

We can also categorize emulsion as according to the droplets size of dispersed phase

Macro emulsion

Micro emulsion

Nano emulsion

Difference between Notebook and Laptop

Difference between Notebook and Laptop

Sometimes people called notebook to the laptop. There is technically different between laptop and note book. Technically laptop is larger than the notebook.

Laptop is small portable computer which can be used on your lap. The size of note book is just like A4 size paper of notebook. So it is known as the notebook. While notebook is smaller than the laptop.

Notebook is also the personal computer it is lighter than the laptop. Weight of laptop is around 5-20 pound. The weight of the notebook is around 5 to 6 pound.

Laptops have screen size of 12 inches up to 19 inches in the viewing area. Notebook have screen area of 9 inches up to around 15 inches in the viewing area.

Laptop is most widely used for business purpose while notebook is used for personal use.

Laptop has facility of internal CDs and DVDs drive. while notebook does not have facility of internal CDs and DVDs drive. It has a minimal graphics system. it has an integrated modem

Laptop can handle many program because of large processor size. Notebook is usually not able to handle as many programs or open windows due to their smaller processor size.

RAM and hard disk capacity in laptop is higher than the note book

Laptop has a facility of fan which provide the cooling facility to the system. Notebook does not have cooling facility due to the less processor power.

Many laptops are large enough to offer a full keyboard. while notebooks has not large keyborad

Application of emulsion

Following are the application of emulsion in different way:

1. Milk is also example of emulsion. In which fat is soluble in water phase.

2. Asphalt which used in preparation of roads is a emulsified in water is used for without the necessity of melting the asphalt.

3. Many insecticides and pesticides which used in agriculture are also one type of emulsion.

4. Paints and inks are also prepared by emulsification.

5. The digestion of fats process is also example emulsification. The absorption of fats is the emulsification process.

6. Cosmetics like cream and lotion are also prepared by emulsification method. Emulsified cosmetics have fine texture and a smooth touch upon application, so sustained release of the active ingredient from continues phase of emulsion can increase skin penetration of active ingredients and thus increase their concentration into the skin.

7. Many Shampoo and hair conditioners are also example of emulsion. HLB scale or HLB system is used to decide which emulsifying agent is used.

8. Emulsions can protect active molecules such as vitamins C and E from the external phase from oxidation.

9. Emulsion is also used as antiaging products and sun skin lotion.

10. The wet wipes which used for make-up removal, face care, body care & baby care products. In these products also emulsion is used.

11. Some emulsion products are also patented for manufacturing.

12. Example: emulsion of acid fatty acid esters and its uses in cosmetics, dermatological, pharmaceutical or ophthalmology fields by L’Oreal Paris.

emulsion based on ethylene oxide and propylene oxide block co polymers which used in the cosmetics, dermatological or ophthalmology fields by L’Oreal Paris

13. low viscosity emulsion such as Spray and aerosols are used as cosmetics

14. Emulsion is also used in screen printing, making the stencils. photo emulsion also used.

15. Emulsion is also used in food industry. Some food products are also made by emulsification process

16. Mainly emulsion is prepared as different dosage form for detailed information of refer article Application of emulsion in pharmaceutical industry.

Difference between Emulsion and Suspension
Definition of Emulsion, Types of Emulsion
Pharmaceutical industry and Emulsion
HLB Scale and Emulsifying Agent
Emulsifier or emulsifying agent and emulsion

pharmaceuticals industry and emulsion

Application of emulsion in pharmaceuticals industry

Pharmaceutical emulsion can be used

As parenteral preparation
As ophthalmic preparation
As Aerosols
As Ointment
As Cream and lotion.
As a diagnostic purpose

Emulsion is used as a oral dosage form :

Emulsions also enhance the oral absorption bio availability of the poor water soluble drugs.
Emulsion is most widely used to deliver drugs into the body. Emulsions are worked as a carrier for drug molecule. It provides carrier for low water soluble drugs.
Oral it decreases the unpleasant taste and improves the absorption
Oral emulsions mostly O/W.To enhance palatability of oils when given orally.

Emulsion as Panenteral:

Lipid emulsion is most widely used as Panenteral dosage form.
Lipid emulsion used to provide the nutrient to the body by Panenteral way.
Nutrient oils are injected intravenously in the form of emulsions which are unable to swallow.
Some emulsion used as injections. emulsion reduce the pain and irritation of the inject able preparation example: Amphotericine, diazepam, propofol
Emulsion decrease the toxicity of the some drugs. Ex: Amphotericine, diazepam, propofol
Emulsion also Improved Stability and Solubility of the intravenous preparation

Emulsion as aerosol:

Emulsion of the finely divided drug substance typically is dispersed in the
liquid propellant with the aid of suitable biocompatible surfactants or other excipients. Propellants for aerosol formulations are typically low. The two-phase formulation consists of drug(s) dissolved in liquefied propellant. Liquid co solvents such as alcohol, propylene glycol, and polyethylene glycols often are added to enhance the solubility of the drug substance.

For sustained drug release and depot formulation:

water-soluble drug solubilize into the water phase of the emulsion globule, which showed prolonged release properties and lessen toxic effects
Most of the water soluble antigents and some drugs are formulated as water in oil type emulsions for depot injection purpose (sustain and release).

Topical emulsion

topical emulsions are creams which have emollient properties. topical form of emulsion prevent the trans epidermal water loss, enhanced skin smoothness and penetration of active ingredients.
Gel emulsion mean emulsion in gel which is also known as emugel. Antifungal drugs are applied in this form on the skin.

Other Application:

Some of the perflorinated hydro-carbons are formulated as oil in water emulsions used for oxygen replacement therapy.
Some of the emulsions containing radio opaque substances are used for diagnostic purpose.
Emulsion based wet wipes for such applications as baby care and make-up removal.

HLB Scale (hydrophile-lipophile balance) and emulsifying Agent

HLB Scale (hydrophile-lipophile balance) and emulsifying Agent:

We discussed about the emulsifying agent(emulsifier).

To select appropriate emulsifying agent we used the HLB SCALE system.

HLB Scale means hydrophile-lipophile balance.

HLB system was developed by William C. Griffin to proper selection of the emulsifying agent.

All emulsifying agents have lipophilic and hydrophilic part. HLB value of emulsifying agent is based on the lipophilic and hydrophilic group present into the emulsifying agent.

The HLB value is an indication of the solubility of the Emulsifying agent.Generally HLB scales apply to the non-ionic surfactant.

HLB system has an arbitrary scale of 1 - 18.

HLB RANGE	USE
0-3	Anti foaming agent
4-6	W/O emulsifying agent
7-9	wetting agent
8-18	O/W emulsifying agent
13-15	Detergents
10-18	stabilizing agent

-Higher the HLB value means more number of hydrophilic groups in the molecule.

Mean more water soluble or hydrophilic the surfactant is.

-The lower the HLB value the more lipophilic or oil soluble the surfactant mean more lipid soluble or lipophilic surfactant is.

-Emulsifying agents exhibiting an HLB between 3 to 6 are used to produce w/o emulsions.so they are known as w/o emulsifying agents.

-Example: span 80

-HLB value span 80 of 4.3

-Emulsifying agents that exhibit an HLB between 6 to 9 form non-stable milky dispersion in water.

-Example: span 40

-HLB Value of span 40 is 6.7

-Emulsifying agents exhibiting an HLB between 9 to 16 are used to produce o/w emulsions. so they are known as o/w emulsifying agents. 13–16). Examples include:

-Example: Tween 65

-HLB value of Tween 65 is 10.5

some example:

HLB RANGE	USE
PEG 400 Monostearate	11.6
Span 40	6.7
Span 20	8.6
Tween 20	16.7
Tween 40	15.6
Tween 65	10.6
Tween 85	11.0
Sodium oleate	18

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