In this paper we discuss about tenacity and its properties in stability calculation. We indicate relationships between tenacity and connectivity, tenacity and binding number, tenacity and toughness. We also give good lower and upper bounds for tenacity.

Sum rv01,1f. A mo(lifie(l )rocedlure is presente(d for the bioassay of aulxin lusilng -Iv'eno coleoptile segments. The modifications introduicedl restult in a substantial improvement of the commonly uised( coleoptile elongatioil tests. The proposed test retains the simplicity of physical reqillremeints and of manipulatioIn characteristic of all elongatioln tests. The maiin featuire of the propo...

Etlhylene production by the greenl miold of citrus, Plenicilliutmit digitatuimit Sacc., has beeni investigated by a number of workers (1), but its pathway of biosynthesis and importance in fungal metabolism have yet to be defined. Factors affecting growth of the funglus have been studied intensively and a satisfactory medium has been developed (2, 7). The importance of zinc and yeast extract as...

In a study oln the effect of light quality on plant growth we found a direct relationship between IAA content and plant height (1). Of the several spectral regions used the red produced plants which were the shortest andl had the least IAA. Using low intensity radiation MIeijer (3) also obtained inhibition of elongation in red light but was able to obtain some reversal by the addition of IAA an...