Immunbiologische und chemische Untersuchungen an Hefen

Ohne Zusammenfassung     

A Machine for Disintegrating Living Woody Shoots

The disintegrator was constructed from a standard circular,tempered-steel wire brush. This was ground accurately to sizeand shielded for safety and to reduce draught. Each twig onbeing held against it was reduced to a fine powder that couldbe collected in a solvent. In this way chemical change was arrested.     

Effect of Gibberellic Acid on Rate of Extension and Maturation of Pea Internodes

Gibberellic acid (GA) does not delay maturation of pea internodes;on the con-trary, maturation (i.e. cessation of extension) takesplace slightly earlier. Thus the increased length of internodesresulting from GA treatment is due entirely to increased rateof extension. In this experiment, GA treatment of plants accelerated the visibleproduction of the first flower bud by about 4 days: the nodebearing the first flower was not altered. The total number offlower buds produced by the end of the experiment was increasedas a result of GA treatment, but many of those first formedon plants receiving high doses (I-IOµg.) withered beforeopening.