Nematicidal activity of the essential oils of different plant species belonging to the families Labiatae (Ocimum basilicum, Ocimum sanctum and Mentha piperata), Myrtaceae (Callistemon lanceolatus and Eugenia caryophyllata) and Gramineae (Cymbopogon caesius) and their major monoterpenoidal constituents, linalool, eugenol, menthol, cineole and geraniol was determined against second‐stage juveniles of seed‐gall nematode (Anguina tritici), citrus nematode (Tylenchulus semipenetrans), root‐knot nematode (Meloidogyne javanica) and pigeon‐pea cyst‐nematode (Heterodera cajani). The essential oil of E. caryophyllata and its major constituent eugenol, as well as linalool and geraniol, exhibited non‐specific activity against all the four nematodes tested.

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The effect of monosodium glutamate (MSG) on the histogenesis of bone and bone marrow of mice is studied. Intraperitoneal-subcutaneous injections and oral administration of the drug MSG induced marked repression in the ossification of developing endochondral bone with the persistence of cartilagenous elements and chondrocytes. A massive accumulation of adipose tissue accompanied by receded haemopoietic tissue within the bone marrow is observed in the MSG-treated animals. These pathological changes are attributed to the influence of the drug on the hydrolysis of enzyme alkaline phosphatase, glycolysis involved in the bone deposition or on the secretion of hormones responsible for bone resorption.