Growth substances are compounds of a hormonalnature which, although present in the plant in extremely low concentrations, govern the life of the plant. 1\-1:uch regarding these substances is still obscure. Until recently it was thought that the chemical structure of all c~mpounds with growth substance activity (both natural and synthetic) conformed to two essential requirements, but the members...

The infrared absorption spectra of s ix 2-oxol ,3-bis(phe nylh ydrazon es), four tris(phenylhydrazones), and six related monoa nd bis-(phenylhydrazono) derivatives are prese nted_ ror compari son , partia l spec tra of te n selec ted aromatic azo co mpounds a re al so given a nd di scussed_ The important features of the absorption bands ari sing from the N = N (1579 to 1558 emI and 1447 to 1408...

actinomycetes were isolated from marine sediment samples collected from the east coast of chennai, tamil nadu, india. well diffusion and agar plug methods were used for the evaluation of antibiotic production by these isolates against drug resistant methicillin- resistant staphylococcus aureus (mrsa) and vancomycin resistant enterococci (vre). the potential isolate vitbrk2 was mass cultured for...

Plant injury has been traced to ammonia derived from organic sources such as urine (9), chicken manure (8), cottonseed meal (12) and animal manure (3). In addition, inorganic sources such as aqua ammonia, anhydrous ammonia, and ammonium salts have been reported injurious to plants when placed too close to the root zone (3, 7). The toxicity of ammonia to animals has been demonstrated by Sumner (...

"DEDICATED TO THOMAS WALMSLEY." This statement alone will make many generations of medical men from Belfast consider that this book must be a model of original thought lucidly expressed. The principles are indeed set out with a clarity and in a logical sequence that fully justify the dedication. Nevertheless, it is not an "easy" book in the generally accepted sense of the term, for it is never ...

and M. A. MacConaill. (Pp. xi + 304; figs. 60. 50s.) London: Longmans, 1961. "DEDICATED TO THOMAS WALMSLEY." This statement alone will make many generations of medical men from Belfast consider that this book must be a model of original thought lucidly expressed. The principles are indeed set out with a clarity and in a logical sequence that fully justify the dedication. Nevertheless, it is not...