Due to an interest in the evolutionary origins of
vertebrate mechanisms of immunorecognition, researchers
have frequently turned to deuterostome invertebrates as
model organisms. The purple sea urchin, Strongylocentrotus
purpuratus (Echinodermata: Echinoidea), was selected for
this study of putative immunorecognition molecules in a
deuterostome invertebrate.
Hemagglutinins, molecules which agglutinate red blood...
The host snail Biomphalaria glabrata and the parasitic trematode
Schistosoma mansoni are valuable subjects for studies evaluating and
defining immunological parameters that determine the outcome of
individual host-parasite encounters. In this thesis, both soluble and
cellular components of the snail's hemolymph were examined to gain
insight into the basis for...
It has long been observed that stress can increase our
susceptibility to infectious diseases and cancers. Recent
experimental evidence suggests that this increased susceptibility is
due to suppression of immunity. A variety of neuroendocrine products
are released during periods of stress, and a large number of these
are now known...
Characteristics of bacterial clearance were investigated in the
purple sea urchin, Strongylocentrotus purpuratus (Echinodermata:
Echinoidea). Primary clearance kinetics were determined for three
bacteria, a marine Gram negative motile rod, a marine Gram positive non-motile
rod, and a fresh water fish pathogen, Aeromonas salmonicida.
Various doses of live bacteria were injected...
Several additives have been used in research and on an
industrial scale to improve the pulp yield and to increase
the rate of delignification. One such additive is 1,4-
dihydro- 9,10-dihydroxyanthracene (DDA), also called soluble
anthraquinone. This chemical is widely used in Japan and
some other countries, especially with the...
Classification of Streams and stream habitats is useful for research involving establishment of monitoring stations, determining local impacts of land use practices, generalization from site-specific data, and assessment of basin-wide, cumulative impacts of human activities on streams and their biota. This thesis presents a framework for a hierarchical classification system,...
The association of frontal formation, development, and movement with
large scale baroclinity is well documented. This investigation
deals with the mean large-scale baroclinic zones near the Asian East
Coast for the last two weeks of February 1975. Two deep, large-scale
baroclinic zones are found to be situated along the axis...
Biliary excretion of taurocholate in thermally acclimated rainbow trout was stimulated at higher environmental temperature (18 vs. 14 or 10° C)e Acute 4° C shifts in body temperature produced more pronounced changes in biliary excretion. Thermally modulated biliary excretion was negatively correlated with plasma half live of taurocholate. Absorption of...
Two experiments involving interactions between wheat
(Triticum aesitivium L.) cultivars and rust pathogens were
investigated. One experiment evaluated the aggressiveness
(measured by infection efficiency and latent period) of
populations of Puccinia recondita Rob. when inoculated on
the cultivar they were isolated from, their "own" cultivar,
and when inoculated onto other...