Gibberellin and Protease Activity in Medicago sativa

During germination of the lucerne seed, proteolytic and gibberellinic activity increases. Exogenous GA added to the solution in which the seed was germinated caused an increment in proteolytic activity. CCC inhibited the biosynthesis of GA in the seed- ling, and had no effect on the proteases. This indicates that there are other factors Hum GA responsible for the increment in proteolytic activity during Medicago germination.     

Subunits of flagellar accessory tubules

Many sperm flagella contain a central pair of singlet tubules surrounded by nine doublet tubules. Insect sperm flagella, however, usually contain in addition to the typical 9+2 arrangement of tubules, an additional row of nine singlet tubules which are called accessory tubules. Each of these accessory tubules in the Colorado potato beetle (Leptinotarsa decemlineata (Say)) contains a single central prototubule surrounded by an array of 15 or 16 peripheral prototubules. The number of prototubules in the accessory tubules of Leptinotarsa decemlineata was determined with an electron microscope and image details were reinforced by the rotation techniques of Markham.     

Immunological studies in tropical splenomegaly syndrome in Uganda

An immunological evaluation carried out in eight patients with the tropical splenomegaly syndrome showed no evidence of impairment in cellular or humoral immunity, though raised levels of macroglobulins were noted in four patients. Hence gross immunological deficiency cannot be associated with the intense lymphoreticular proliferation observed in this disorder.     

Simple Medium for Pigment Production by the Erythrasma Diphtheroid

A simple method for the isolation and identification of the causative diphtheroid of erythrasma, Corynebacterium minutissimum, utilizes Muiller-Hinton Agar.