Hydroxyurea (10mM) blocks the exponential growth of Tetrahymena
pyriformis (GL-I) populations by arresting progress through the cell
cycle once the cells enter S-phase. Autoradiographic analysis reveals
that HU reduces the uptake of tritiated thymidine (³H-TdR) into
macronuclear DNA in S-phase cells to about 1/5 of that in untreated
S-phase cells....
A number of historians of science have been involved
in studying the nature of biology at the turn of the
century, and the picture that they have developed describes
biology during this time as a field struggling to define
itself. During the late nineteenth and early twentieth
centuries, biologists were...
The portion of the Oregon coast extending from Cape Blanco south into California has long been recognized as a distinct physiographic region, with probable ramifications for prehistoric subsistence and settlement patterns. Several researchers have proposed models outlining a greater reliance upon marine/littoral resources among groups within this region, while more...
Shrews previously recognized as Sorex monticolus were classified
into two species (one with 14 subspecies, the other monotypic) on
the basis of a morphometric analysis of 3610 individuals from
throughout their range. Sorex m. neomexicanus has been recognized
previously as a subspecies of Sorex monticolus but is recognized
herein as...
Bayesian Optimization (BO) methods are often used to optimize an unknown function f(•) that is costly to evaluate. They typically work in an iterative manner. In each iteration, given a set of observation points, BO algorithms select k ≥ 1 points to be evaluated. The results of those points are...
The effect of frozen storage time on the composition
of the cell wall polysaccharide (CWP) of muskmelon (Cucumis
melo) cultivars at different stages of maturity was investigated.
Changes in composition, firmness, drip loss, and
color of Cantaloupe and Honey Dew melon flesh were determined
at three stages of maturity and...
Infectious diseases are a growing concern for both humans and wildlife. The negative effects of infectious disease have been exemplified by the recent global amphibian population declines associated with disease outbreaks. Although multiple pathogens and factors play a role in these declines, the aquatic fungal pathogen, Batrachochytrium dendrobatidis (Bd), has...