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Questions and Answers
What is a characteristic of essential oils?
What is a characteristic of essential oils?
- They are obtained only through steam distillation
- They are often diluted with water
- They are highly concentrated and volatile (correct)
- They are always dark brown liquids
Which method is used to obtain essential oils?
Which method is used to obtain essential oils?
- Drying
- Steam distillation (correct)
- Freezing
- Boiling
What are terpenes and terpenoids?
What are terpenes and terpenoids?
- Types of aldehydes
- Aromatic compounds responsible for the plant's aroma (correct)
- Types of esters
- Phenolic compounds
What is a characteristic of aromatic compounds?
What is a characteristic of aromatic compounds?
What are some sources of aromatic compounds?
What are some sources of aromatic compounds?
What is a use of essential oils?
What is a use of essential oils?
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Study Notes
Volatile Oil Classification
Essential Oils
- Definition: Concentrated plant extracts containing volatile compounds responsible for the plant's aroma and flavor.
- Characteristics:
- Highly concentrated (often 50-100 times more concentrated than the plant material)
- Volatile (easily evaporated)
- Typically clear or pale yellow liquids
- Obtained through various methods, including:
- Steam distillation
- Solvent extraction
- Expression (cold pressing)
- Used in:
- Aromatherapy
- Perfumery
- Flavorings
- Pharmaceuticals
Aromatic Compounds
- Definition: Organic compounds responsible for the aroma and flavor of plants.
- Types:
- Terpenes (e.g., pinene, limonene)
- Terpenoids (modified terpenes, e.g., menthol, camphor)
- Phenolic compounds (e.g., vanillin, eugenol)
- Aldehydes (e.g., citral, vanillin)
- Esters (e.g., linalyl acetate)
- Characteristics:
- Volatile and fragrant
- Often responsible for the plant's defense mechanisms
- Can have pharmacological effects (e.g., antibacterial, anti-inflammatory)
- Found in:
- Essential oils
- Spices
- Herbs
- Flowers
- Fruits
Volatile Oil Classification
Essential Oils
- Definition: Concentrated plant extracts responsible for aroma and flavor.
- Characteristics:
- Highly concentrated (50-100 times more concentrated than plant material).
- Volatile (easily evaporated).
- Typically clear or pale yellow liquids.
- Obtainment:
- Steam distillation.
- Solvent extraction.
- Expression (cold pressing).
- Uses:
- Aromatherapy.
- Perfumery.
- Flavorings.
- Pharmaceuticals.
Aromatic Compounds
- Definition: Organic compounds responsible for aroma and flavor in plants.
- Types:
- Terpenes (e.g., pinene, limonene).
- Terpenoids (modified terpenes, e.g., menthol, camphor).
- Phenolic compounds (e.g., vanillin, eugenol).
- Aldehydes (e.g., citral, vanillin).
- Esters (e.g., linalyl acetate).
- Characteristics:
- Volatile and fragrant.
- Responsible for plant defense mechanisms.
- Can have pharmacological effects (e.g., antibacterial, anti-inflammatory).
- Found in:
- Essential oils.
- Spices.
- Herbs.
- Flowers.
- Fruits.
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