Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PHA 619 LAB 3rd Shifting > Two Phase System Emulsions > Flashcards

Two Phase System Emulsions Flashcards

1
Q

Homogenous preparation

A

Emulsion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Two face system in which one liquid is dispersed in the form of small globules throughout another liquid in which it is immiscible

A

Emulsion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the three components of an emulsion?

A

Disperse liquid — internal phase/ discontinuous phase

Dispersion medium — external phase/continuous phase

Intermediate Agent — emulsifying Agent/dispersing or stabilizing agent/emulsifier/intermediate liquid/surfactant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

External phase

A

Dispersion medium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Discontinuous phase

A

Dispersion liquid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Dispersing or stabilizing agent

A

Intermediate agent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Composition of oil-in-water emulsion

A

External phase: water
Internal phase: oil
Continuous phase: water
Discontinuous phase: oil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Composition if an emulsifier

A

Hydrophilic head - water loving

Lipophilic tail - oil loving

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

2 Types of emulsifying Agent

A

Natural or synthetic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Natural emulsifying agent with animal origins

A

Gelatin
Egg yolk
Casein
Wolfat
Cholesterol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Natural emulsifying agent with vegetable origins

A

Chondrus
Acacia
Tragacanth

Pectin
Carrageenan

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Synthetic emulsifying Agent

A

Finely divided solid
Colloid
Anionic
Catonic
Non-ionic
Amphoteric

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Finely divided solid

A

Mg(OH)2
Al(OH)3
Magnesium trisilicate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Colloid

A

Kaolin
Bentonite Magma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Anionic

A

SLS — sodium lauryl sulfate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Cationic

A

Benzalkonium chloride

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Non-ionic

A

PEG 400
Spans
Tween (polysorbate)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Amphoteric

A

Lecithin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Type of emulsion

A

Simple
Multiple
Microemulsion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Simple emulsion

A

O/W used internally
W/O

21
Q

Multiple emulsions

A

O/w/o
W/o/w

22
Q

Most stable of the three types of emulsion

Dispersed phase is in very small globules

100-1000A (1A=0.1nm)

A

Microemulsion

23
Q

Methods of preparation for emulsions

A

Wet or English
Dry or continental
Bottle or Forbes

24
Q

Primary nucleus is triturated in One Direction, creamy, sticky mixture with cracking sound

4:2:1 (O:W:EA) or (O:W:G)

A

Wet or English
Dry or Continental

25
Q

Volatile oil (3:2:1 = O:W:G) shaking vigorously

A

Bottle or Forbes

26
Q

Wet or English method

A

1:Gum/Emulsifying Agent
2:Water
4:Oil

Gum and water forms mucilage so better add the gum carefully to water

27
Q

Dry or continental method

A

1:Gum or Emulsifying Agent
4:Oil
2:Water

Add water all at once for this method

28
Q

Bottle or Forbes

A

1:Gum/Emulsifying Agent
3:Oil
2:Water

29
Q

Rough mortar and pestle is used for this method of preparation of emulsions

A

Dry or continental

30
Q

One part gum is triturated with two parts water to form a mucilage

Four parts oil is then added slowly, in portions, while triturating

A

English or wet gum method

31
Q

One part gum is levigated with four parts oil until powder is thoroughly wetted

Then two parts of water is added all at once

Continually triturated until primary emulsion formed is. creamy white and produces crackling sound as it is triturated

A

Continental or dry gum method

32
Q

Mortar and pestle with rough inner surface

A

Dry Wedgewood mortar and pestle

33
Q

The ratio between oil water and gum is 2:2:1 or 3:2:1

A

Bottle or Forbes

34
Q

Criteria for selecting an emulsifier

A

Compatible with other formulative agents

Should not interfere with the stability or efficacy of the therapeutic Agent

Stable and does not deteriorate in the preparation

Nontoxic with respect to its intended use

Should possess little odor or taste

35
Q

Problem: Temporary separation of the two phases

Solution: shake again

A

Creaming

36
Q

Problem: total separation of the 2 phases with coalescence

Solution: none (should be avoided at all costs)

A

Cracking

37
Q

Evaporation of water
O/W -> W/O

A

Phase inversion

38
Q

Change of one type of emulsion to another type due to an addition of an electrolyte or change in emulsifying agent or temperature.

A

Phase inversion

39
Q

To identify an emulsion — add a drop of water
Homogenous ->O/W

A

Drop dilution test

40
Q

Result of drop dilution test

A

O/W

41
Q

Oil soluble —> Sudan red —> W/O
Water soluble —> amaranth green/methylene blue —> O/W

A

Dye solubility test

42
Q

If the result of the dye solubility test is Sudan red, what is the type of emulsion?

A

W/O

43
Q

If the result of the dye solubility test is Amaranth green what is the type of emulsion identified?

A

O/W

44
Q

Electric conductivity test identifies?

A

O/W
Water conduct electricity

45
Q

What does fluorescent test identify?

A

W/O
Oil can absorb UV light

46
Q

Dispersed particles will come together, but does not fuse meaning that they will not form into a large globule

A

Flocculation

47
Q

Process in which two or more droplets merge together to form a single large droplet
It is an irreversible process

A

Coalescence

48
Q

Total separation of the two phases with coalescence

A

Cracking

PHA 619 LAB 3rd Shifting (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions