scales per 100 leaves varied from 3.3 to 8.7. Scales containing active forms of Aphytis numbered in excess of 18 per 100 healthy scales each month, and in one month were as high as 183 per 100 healthy scales. These figures demonstrate that Aphytis was active during each of the 15 months and present in sufficient numbers to hold purple scale at low level regardless of weather fluctuations. This ...

Purple urine bag syndrome is an uncommon but particularly striking phenomenon observed in people with urinary catheters and co-existent urinary tract infections. A chemical reaction between plastic and certain bacterial enzymes results in an intense purple urine color. We report a 72 year-old male with a cystostomy. A purple coloration of his urinary drainage bag and tubing was noted in the con...

A rapid test is described which distinguishes enterococci from other group D streptococci in 8 to 24 h by use of a medium containing brain heart infusion agar, NaCl, dextrose, and bromocresol purple.

A thermophilic photosynthetic purple bacterium was isolated from the waters of a hot spring in Yellowstone National Park, Wyoming. The organism differs from all known purple bacteria in that it grows optimally at a temperature of about 50 degrees C. The isolate contains bacteriochlorophyll a and grows autotrophically, oxidizing sulfide to elemental sulfur which is then stored as globules inside...

Nanoscale electron transport through the purple membrane monolayer, a two-dimensional crystal lattice of the transmembrane protein bacteriorhodopsin, is studied by conductive atomic force microscopy. We demonstrate that the purple membrane exhibits nonresonant tunneling transport, with two characteristic tunneling regimes depending on the applied voltage (direct and Fowler-Nordheim). Our result...

A merica, we are told, is a nation divided. Maps of the electoral votes cast by the states in recent U.S. presidential elections reveal a striking pattern. The base of the Democratic Party is firmly rooted in the northeast and upper Midwest—a region stretching from Maine to Minnesota—plus the Pacific West, anchored by California. The Republicans are said to own an L-shaped region covering the S...