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Questions and Answers
What is responsible for the flavor of Foenugreek?
What type of alkaloids are present in Foenugreek seeds?
How many volatile constituents have been detected from Foenugreek seeds?
What is the name of one of the alkaloids present in Foenugreek seeds?
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Where are the volatile constituents detected from?
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What is the other alkaloid present in Foenugreek seeds besides gentianine?
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What is unique about the constituents of Foenugreek seeds?
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What is the primary contributor to the flavor of Foenugreek seeds?
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Which type of alkaloid is present in Foenugreek seeds?
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What is the chemical nature of gentianine?
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What is a characteristic of the volatile constituents in Foenugreek seeds?
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What is unique about the composition of Foenugreek seeds?
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What is the name of the other alkaloid present in Foenugreek seeds?
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What is the significance of Foenugreek seeds in terms of their composition?
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Study Notes
Active Constituents of Mustard
- Mucilage is present in the epidermis of black mustard, which turns blue with Methylene Blue (MB).
- Fixed oil is present in the embryo of black mustard, which turns red with Sudan III.
- Black mustard contains approximately 29% protein, which turns yellow with picric acid.
Sulphur Glycosides in Mustard
- Sinigrin, a sulphur glycoside, is present in black mustard.
- Sinigrin reacts with myrosin enzyme in the presence of water to produce glucose and allyl-isothiocyanate, a volatile oily material responsible for the pungent taste.
- White mustard contains sinalbin, a sulphur glycoside, which reacts with myrosin enzyme in the presence of water to produce glucose and acrinyl-isothiocyanate, a non-volatile yellow liquid with a pungent taste.
Foenugreek Seeds
- Foenugreek seeds contain 23-25% protein, which is rich in lysine and tryptophan amino acids.
- Steroidal saponins are present in Foenugreek seeds.
- Over 50 volatile constituents have been detected in Foenugreek seeds, responsible for the flavor of Foenugreek.
- Alkaloids of the pyridine type, such as gentianine and trigonelline, are present in Foenugreek seeds.
Active Constituents of Mustard
- Mucilage is present in the epidermis of black mustard, which turns blue with Methylene Blue (MB).
- Fixed oil is present in the embryo of black mustard, which turns red with Sudan III.
- Black mustard contains approximately 29% protein, which turns yellow with picric acid.
Sulphur Glycosides in Mustard
- Sinigrin, a sulphur glycoside, is present in black mustard.
- Sinigrin reacts with myrosin enzyme in the presence of water to produce glucose and allyl-isothiocyanate, a volatile oily material responsible for the pungent taste.
- White mustard contains sinalbin, a sulphur glycoside, which reacts with myrosin enzyme in the presence of water to produce glucose and acrinyl-isothiocyanate, a non-volatile yellow liquid with a pungent taste.
Foenugreek Seeds
- Foenugreek seeds contain 23-25% protein, which is rich in lysine and tryptophan amino acids.
- Steroidal saponins are present in Foenugreek seeds.
- Over 50 volatile constituents have been detected in Foenugreek seeds, responsible for the flavor of Foenugreek.
- Alkaloids of the pyridine type, such as gentianine and trigonelline, are present in Foenugreek seeds.
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Description
This quiz covers the active constituents of black mustard and white mustard plants, including mucilage, fixed oil, protein, and sulphur glycosides.
