Only a few investigations have been reportedl of attempts to reveal the geometry of translocation by radioautography. Biddlulph's radioautograms of kidney bean stems (1, 2) show general localization of activity in the phloem region following foliar applications of p32, S-35, andl Cl40-. Thaine and Wralters (5) reported preliminary work with C14-photosynthate in soybeans. The application of radi...

in this paper, we consider the construction of a new class ofnumerical methods based on the backward differentiation formulas(bdfs) that be equipped by including two off--step points. werepresent these methods from general linear methods (glms) pointof view which provides an easy process to improve their stabilityproperties and implementation in a variable stepsize mode. thesesuperiorities are ...

Griffiths ( 13) has presented evidence in(licating that the browning reactions of banana fruit result from the enzymic oxi(lation of (lopamiiine (3.4 (lih-droxyphenylethylaminei) hy pIolyphenoloxi(lase. Althoughi (lopamine does occur in various fruits andl vegetables (23), it has not previously b)een imiplicated as an important substrate in browning reactions. The present investigation was unde...

I NTRODUCTION. .-kB()uT a 'ea r ago Professor'Ilornson suggested to iie that it Would be intelesting to examine the medical histories of a serieis of cases of ervtlhenia nlodosutim, to see whetherthere was in anxr of thienm anla evidence of a definitelv tuberculous or rheumatic origin. Dr. Turkington18 lhas alread\y put the tuberculous theory before the Society, andl if the pr-eseint series sho...

It is desirable and necessary to reexamine the influences of stock andl scion oIn alkaloid synthesis and transformation using plants which behave differently witlh respect to alkaloid formation (4). Experiments were conducted in the greenhouse for 3 years in an attempt to separate the effects of root, or stock, from those of the top, or scioIn, on alkaloid synthesis and transformation. Some of ...