USGS Science⌕ Search

Geology topics

Ken Wolf

Publications and source records attributed to Ken Wolf.

16 recordsLinked to original sources
USGS1982

Survival of duck plague virus in water from Lake Andes National Wildlife Refuge, South Dakota

An isolant of duck plague herpesvirus from the Lake Andes Refuge outbreak was seeded in raw and filter-decontaminated water from two locations on the refuge, held at 4 C, and assayed for infectivity intermittently over a period of 2 mo. From an initial level of about 10 5 PFU per ml, infectivity in the filtered samples uniformly dropped to about 10 4 PFU per ml. Infectivity in the raw samples declined much more rapidly; infectious virus remaining at the end of 2 mo (ca. 10 1 PFU per ml) was only about 0.01% of that originally seeded.

South Dakota↗
USGS1959

Plasmoptysis and gelatin of erythrocytes in coagulation of blood of freshwater bony fishes

1. A clot-like material which results from very rapid plasmoptysis and hydrophyllic swelling of karyoplasm of erythrocytes from freshwater fish was reported. This attribute was found to a lesser degree in erythrocytes from an amphibian, but it was almost lacking in those of an aquatic reptile. 2. Rapid clotting of fish blood with the usual clinical methods was confirmed in this work. Fish blood clotted more quickly with the slide test than with the capillary tube test. In the presence of water, complete coagulation of fish blood occurred in only 65 per cent of the time required for clotting to be completed in air. This speed is attributed to the water-erythrocyte reaction, and not to a quality of the plasma. 3. An attempt was made to correlate the findings with the need for hemostasis and blood coagulation that is peculiar to aquatic vertebrates.

Blood↗