After screeninig several lhundlred cultures of fungi, actinomvcetes, aid bacteria isolated fromii various soils for plant growtlh regulating activity, a fungus culture. F7-2578 (identified later as Peneicilliumiit pufrpurresceiis), was found( whIiclh had a (lwNarfing effect on pea planits. A foliage spray of the culture filtrate inhibite(d the gro)wvth of the stemls, producing shortened interno...

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...

A mixture of a carhoxylic acid type of cation exchange resin and a weakly basic anion exchange resin has been used successfully to control the edema of 42 patients wvith congestive heart failure andl the ascites of 14 patients with cirrhosis of the liver. Approximately one-third of the cation exchanger was supplied in the potassium cycle. Inclusion of the anion exchange resin resulted in a grea...

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 ...

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...

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...