LAB - Expt. 9 (unfinished)

Fragrance

combination of chemicals that gives each perfume or cologne (including those used in other products) its distinct scent

• petroleum

• natural raw

Fragrance ingredients may be derived from _____ or _____ materials.

fragrance houses

• companies that specialize in developing fragrances

• where companies that manufacture perfume or cologne purchase fragrance mixtures

Perfume oils

• an oil, type of compound that contains a fragrance to appeal to the senses

• made with synthetic aroma compounds or natural essential oils and are diluted with a carrier

cologne base

most common type of fragrance oil

Perfume oils

the benefit of this oil is that

• tend to last much longer on the skin than standard perfumes

• non-irritating to the skin (hypoallergenic)

• suitable for any type of skin and easy to apply

• great for office use + affordable

• added benefit of deepening your signature scent as your body temperature changes (better on colder skin types)

inside of your wrists

area to best apply perfume oils

fixatives

Chemical or Physical Agents which are used to prevent and preserve the tissue

• physical

• chemical

2 types of fixatives

• heat

• UV rays

• Microwaving

• Freeze-drying

4 types of physical agents

• coagulants

• non-coagulants

2 types of chemical agents

• 95% ethyl alcohol

• Formalin

2 classification of fixatives based on working condition

95% ethyl alcohol

best fixative for cytology

Formalin

best fixative for histopathology

• Aldehyde Fixatives

• Oxidizing Agents

• Protein Denaturing Agents

• Cross Linking Agents

• Unknown Mechanism/Miscellaneous

5 Hopwood Classification of Fixatives:

Picric Acid

this acid is an explosive when dry or when complexes with metal and metallic salts

Tissue

it is fixed by cross-linkages formed between the proteins particularly between lysine residues

lysine residues

Only those _____ which are on the exterior of protein molecule react

24 hours

The reaction with formaldehyde is largely reversible by excess of water especially over the first _____ of reaction time