Lecture 11 Flashcards
Mentha origin
Dried leaves and flowering tops and branches of Mentha peperita family labiatae
Thyme origin
Dried aerial parts of Thymus vulgaris family lamiaceae
Morphology of Mentha
Stem : quadrangular, green to dark purple, Herbaceous
Leaves: opposite decussate,petiolate Ovate lanceolate, light or dark green with acute apex sharpy serrate margin
Herba thyme morphology
Stem: circular, grayish brown or purplish and hairy , shrubby (Suffruiticoss)
Leaves : opposite decussate, sessile or short petiolate , acute apex , entire margin
Mentha Histology of stem
Outline: Quadrangular
Narrow xylem and wide pith (dicot)
Hairy : labiaceous hair, Non-gladular
Diacytic stomta
Odor : aromatic
Taste : aromatic followed by cold sensation
Thyme Histology of stem
Outline: circular
Narrow pith and wide xylem (monocot)
Hairy : labiaceous hair, Non-gladular
Diacytic stomta
Odor : aromatic
Taste : aromatic , spicy
Active constituents in mentha
Volatile oil (78% free menthol and up to 20% of menthol combined)
Tannins Higher than thyme
Flavonoids
Thyme active constituents
Volatile oil (thymol)
Tannins
Flavonoids
Saponins
Thyme uses
Respiratory tract
Carminative
Digestive
Anti-spasmodic
Anthelmintic
Antimicrobial
Mentha uses
Respiratory tract (Decongestant)
Carminative
Digestive
Anti-spasmodic
Anti-emetic
Promotion of liver
Locally anesthetic
Antiparasitic
Antipruritic
Chemical test for thyme and mentha
Sudan III
Special test for thymol
Conc acids+ glacial acetic acid gives deep bluish green color
Special test for menthol
Conc H2SO4 + vanillin gives orange yellow color+ H2O gives violet color
Pharmaceutical preparation of mentha
Toothpaste
Mouth washes and gargles
Soft gelatin capsules
Aromatherapy
Pharmaceutical preparation of thyme
Cough syrup
Dental preparation
Anthelmintic
