The influence of atmospheric humidity and free water on germination and germ tube growth of Botrytis cinerea Pers. ex Fr. was studied. Relative humidities (RH) were maintained inside insulated humidity chambers with sulfuric acid solutions of the appropriate concentrations. Insulation was necessary to reduce the incidence of condensation caused by...
The influence of atmospheric humidity on three aspects of sporulation of
Sphaerotheca pannosa (Wallr.) Lev. var. rosae Wor., which causes rose powdery
mildew, was studied on leaf disks of susceptible Rosa cultivar Samantha.
To study conidiophore production, leaf disks were inoculated on the adaxial
(upper) surface with conidia of S....
A field study was conducted to determine the applicability of multivariate
geostatistical methods to the problem of estimating and simulating pesticide
concentrations in groundwater from measured concentrations of nitrate and pesticide,
when pesticide is undersampled. Prior to this study, no published attempt had been made
to apply multivariate geostatistics to...
The hepatotoxicity of CB was studied in the Sprague-Dawley rat and rainbow trout. In rats, an ip dosage of 9.8 mmol/kg CB (~̲ LD10) produced evidence of liver toxicity over a 72 hr time course. Sulfobromophthalein (BSP) retention maximized 3-16 hr post treatment and normalized after 72 hr whereas plasma...
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...