(thymo-) combining form denoting the thymus.
The thymus lies behind the sternum and consists of 2 lobes that join in front of the trachea.
Each lobe is made of lymphoid tissue consisting of lymphocytes, epithelium, and fat.
The thymus conditions lymphocytes to become T-cells.
It plays a part in the immune response until puberty, gradually enlarging during this time.
After puberty, it shrinks, but some glandular tissue remains until middle-age.... thymus
Habitat: Smaller var., equated with E. thymifolia, is found in tropical plains and low hills of India, ascending to 1,750 m. Bigger var., E. pilulifera/E. hirta Linn. is found in warmer parts of India from Punjab eastwards, and southwards to Kanyakumari.
Ayurvedic: Dudhi (smaller var.), Dugdhikaa, Naagaarjuni, Swaaduparni.Siddha/Tamil: Sittrapaladi.Action: Plant—antispasmodic, bronchodilator, antiasthmat- ic (used in bronchial asthma), galactagogue (also used for spermatorrhoea). Root—used in amenorrhoea. Latex—used in ringworm, dandruff. Leaf, seed and latex—purgative. A decoction of the plant, with honey, is given to treat haematuria.
Aerial parts gave epitaraxerol, n- hexacosanol, euphorbol, two derivatives of deoxyphorbol-OAC, 24-meth- ylene cycloartenol and quercetin galactoside. Co-carcinogenic activity is due to phorbol derivatives. The plant exhibits antimicrobial activity due to alkaloids.Dosage: Whole plant—10-20 g paste. (CCRAS.)Family: Euphorbiaceae.Habitat: Native to Africa; naturalized in the warmer parts of India.
English: Milk-Bush, Milk Hedge, Indian tree Spurge, Aveloz, Petroleum PlantAyurvedic: Saptalaa, Saatalaa.Siddha/Tamil: Tirukalli.Folk: Angulia-thuuhar.Action: Purgative, emetic, antiasthmatic, bechic. Used for whooping cough, asthma, dyspepsia, biliousness, jaundice, enlargement of spleen, leucorrhoea. Latex—applied externally on warts.
Used as a purgative and for rheumatism and neuralgia. Stem bark—used for gastralgia, colic, asthma.The latex contains an ingol ester besides triterpenoids, euphorbinol and cycloeuphordenol.Presence of a number of ingenol and phorbol esters (diterpenoids), and tri- terpenoids are reported from the plant. The stem gave hentriacontane, hentri- acontanol, beta-sitosterol, Me-ellagic and ellagic acids and kaempferol glu- coside.The latex is a weak tumour promoter.... euphorbia thymifoliaThe thymus gland is a vital part of the immunological system. Stem cells (see STEM CELL) from the BONE MARROW come to the thymus where they develop into immunologically competent cells. There are two distinct populations of lymphocytes. One is dependent on the presence of the thymus (Tlymphocytes); the other is independent of the thymus (B-lymphocytes). Both are concerned with immune responses (see IMMUNITY). The T-lymphocyte is a cell which in the absence of antigenic stimulation (see ANTIGEN) circulates through the blood, lymph nodes and back into the circulation again over a period of more than ten years. It performs a policing role, awaiting recognition of foreign material which it is able to identify as such. It reacts by multiplication and transformation and these are the ingredients of the immune response. B-lymphocytes are produced in the bone marrow and are concerned with the production of the circulating humoral ANTIBODIES.
The most common clinical disorder associated with abnormality of the thymus is MYASTHENIA GRAVIS. Ten per cent of patients with myasthenia gravis will have a tumour of the thymus, whilst the remainder will have in?ammatory changes in the thymus called thymitis.... thymus gland
Habitat: Native to North America; also found in temperate Himalayas from Kashmir to Nepal; grown in gardens in western India.
English: Mother-of-thyme, Wild Thyme. Thymus vulgaris (Garden Thyme) is found in the Nilgiris at higher elevations.Ayurvedic: Ajagandhaa, Vana- Yavaani. (Not to be confused with Yavaani, Ajmodaa, Shataahvaa, Raajikaa and Tilaparni.)Unani: Haashaa, Jangali Pudinaa. Thysanolaena agrostis Nees.Action: Antiseptic, antibacterial, antifungal, antiviral, antispasmodic, mild sedative, expectorant. T. serpyllum and T. vulgaris L. are used for coughs and common cold.
Key application: German Commission E approved T. vulgaris for symptoms of bronchitis, whooping cough and catarrhs of the upper respiratory tracts. Also to treat stomatitis. (ESCOP.)The British Herbal Pharmacopoeia recognizes expectorant activity of T. serpyllum.T. serpyllum contains more linalool and p-cymol than Garden Thyme (T. vulgaris). Major constituent of the volatile oil of both the species (highly variable) is thymol; with carvacrol (lesser amount in T. serpyllum, higher in T. vulgaris), 1,8-cineole, borneol, geraniol, linalool. bornyl and lina- lyl acetate, thymol methyl ether and alpha-pinene.Flavonoids include apigenin, lute- olin, thymonin, naringenin; other constituents include labiatic acid, caffeic acid, tannins.The flavonoid fraction has shown to have a potent effect on smooth muscle on guinea-pig trachea and ileum.Thymol is expectorant and antiseptic. Thymol and carvacrol are spasmolytic. Thymol is also urinary tract antiseptic and anthelmintic.Dosage: Whole plant—3–5 g powder. (CCRAS.)... thymus serpyllumFAMILY: Lamiaceae (Labiatae)
SYNONYMS: T. aestivus, T. ilerdensis, T. webbianus, T. valentianus, French thyme, garden thyme, red thyme (oil), white thyme (oil).
GENERAL DESCRIPTION: A perennial evergreen subshrub up to 45 cms high with a woody root and much-branched upright stem. It has small, grey-green, oval, aromatic leaves and pale purple or white flowers.
DISTRIBUTION: Native to Spain and the Mediterranean region; now found throughout Asia Minor, Algeria, Turkey, Tunisia, Israel, the USA, Russia, China and central Europe. The oil is mainly produced in Spain but also in France, Israel, Greece, Morocco, Algeria, Germany and the USA.
OTHER SPECIES: There are numerous varieties of thyme – the common thyme is believed to have derived from the wild thyme or mother-of-thyme (T. serpyllum), which is also used to produce an essential oil called serpolet, similar in effect to the common thyme oil.
Another species used for the production of the so-called red thyme oil is particularly the Spanish sauce thyme (T. zygis), a highly penetrating oil good for cellulitis, sports injuries, etc. (although, like the common thyme, it is a skin irritant). Other species used for essential oil production include lemon thyme (T. citriodorus), a fresh scented oil good for asthma and other respiratory conditions, safe for children. Spanish marjoram (T. Mastichina) is actually botanically classified as a variety of thyme, with which it shares many common properties, despite its common name. Spanish marjoram contains mainly 1,8-cineole (up to 75 per cent) and linalool (up to 20 per cent), so therapeutically has much in common with eucalyptus, being well suited to treating viral and bacterial respiratory infections. See also Botanical Classification section.
HERBAL/FOLK TRADITION: One of the earliest medicinal plants employed throughout the Mediterranean region, well known to both Hippocrates and Dioscorides. It was used by the ancient Egyptians in the embalming process, and by the ancient Greeks to fumigate against infectious illness; the name derives from the Greek thymos meaning ‘to perfume’. It is also a long-established culinary herb, especially used for the preservation of meat.
It has a wide range of uses, though in Western herbal medicine its main areas of application are respiratory problems, digestive complaints and the prevention and treatment of infection. In the British Herbal Pharmacopoeia it is indicated for dyspepsia, chronic gastritis, bronchitis, pertussis, asthma, children’s diarrhoea, laryngitis, tonsillitis and enuresis in children.
ACTIONS: Anthelmintic, antimicrobial, antioxidant, antiputrescent, antirheumatic, antiseptic (intestinal, pulmonary, genito-urinary), antispasmodic, antitussive, antitoxic, aperitif, astringent, aphrodisiac, bactericidal, balsamic, carminative, cicatrisant, diuretic, emmenagogue, expectorant, fungicidal, hypertensive, nervine, revulsive, rubefacient, parasiticide, stimulant (immune system, circulation), sudorific, tonic, vermifuge.
EXTRACTION: Essential oil by water or steam distillation from the fresh or partially dried leaves and flowering tops. 1. ‘Red thyme oil’ is the crude distillate. 2. ‘White thyme oil’ is produced by further redistillation or rectification. (An absolute is also produced in France by solvent extraction for perfumery use.)
CHARACTERISTICS: 1. A red, brown or orange liquid with a warm, spicy-herbaceous, powerful odour. 2. A clear, pale yellow liquid with a sweet, green-fresh, milder scent. It blends well with bergamot, lemon, rosemary, melissa, lavender, lavandin, marjoram, Peru balsam, pine, etc.
PRINCIPAL CONSTITUENTS: Thymol and carvacrol (up to 60 per cent), cymene, terpinene, camphene, borneol, linalol; depending on the source it can also contain geraniol, citral and thuyanol, etc.
There are many chemotypes of thyme oil: notably the ‘thymol’ and ‘carvacrol’ types (warming and active); the ‘thuyanol’ type (penetrating and antiviral); and the milder ‘linalol’ or ‘citral’ types (sweet-scented, non-irritant).
SAFETY DATA: Red thyme oil, serpolet (from wild thyme), ‘thymol’ and ‘carvacrol’ type oils all contain quite large amounts of toxic phenols (carvacrol and thymol). They can irritate mucous membranes, cause dermal irritation and may cause sensitization in some individuals. Use in moderation, in low dilution only. They are best avoided during pregnancy.
White thyme is not a ‘complete’ oil and is often adulterated. Lemon thyme and ‘linalol’types are in general less toxic, non-irritant, with less possibility of sensitization – safe for use on the skin and with children.
AROMATHERAPY/HOME: USE
Skin care: Abscess, acne, bruises, burns, cuts, dermatitis, eczema, insect bites, lice, gum infections, oily skin, scabies.
Circulation muscles and joints: Arthritis, cellulitis, gout, muscular aches and pains, obesity, oedema, poor circulation, rheumatism, sprains, sports injuries.
Respiratory system: Asthma, bronchitis, catarrh, coughs, laryngitis, sinusitis, sore throat, tonsillitis.
Digestive system: Diarrhoea, dyspepsia, flatulence.
Genito-urinary system: Cystitis, urethritis.
Immune system: Chills, colds, ’flu, infectious diseases.
Nervous system: Headaches, insomnia, nervous debility and stress-related complaints – ‘helps to revive and strengthen both body and mind’..
OTHER USES: The oil is used in mouthwashes, gargles, toothpastes and cough lozenges. ‘Thymol’ is isolated for pharmaceutical use in surgical dressings, disinfectants etc. Used as a fragrance component in soaps, toiletries, aftershaves, perfumes, colognes, etc. Extensively employed by the food and drink industry, especially in meat products.... thyme, common
Health Encyclopedia