Avian encephalomyelitis virus-infected chick embryo homogenate
was precipitated with polyethyleneglycol 6000 (PEG), extracted
with fluorocarbon, concentrated by ultrafiltration, and purified by
isopycnic gradient centrifugation. The physical and chemical properties
of the purified virus were studied. The examination of purified
avian encephalomyelitis virus (AEV) with electron microscopy using
negative stain revealed...
Cultural practices in snap bean production were evaluated at the Oregon State University Vegetable Research Farm Corvallis, Oregon. In addition, decision-making in snap bean production was assessed on five farms in the Coburg-Junction City-Harrisburg regions of the Willamette Valley, Oregon. A field experiment with cover crop and tillage techniques was...