Cell division in a heat synchronized Tetrahymena pyriformis
(GL-I) cell can be delayed if the cell is exposed to X-irradiation (300
kVp, 20 mA, HVL = 0. 9 mm Cu, 25 R/ sec) prior to a critical time
after the end of the synchronizing treatment (EST). At the critical
time,...
The core-electron ionization potentials for mono- and
di(trifluoromethyl)benzene, for chlorofluoromethanes and for
chlorine have been measured in order to give information on
the electron distribution in these molecules and to investigate
differences between the inductive effect of fluorine
and that of CF3. For trifluoromethylbenzene the measured
ionization potentials in eV...
Neogene rocks of the Deschutes basin include the middle Miocene
Columbia River Basalt Group and Simtustus Formation, and late Miocene
to early Pliocene Deschutes Formation. Assignment of Prineville
chemical-type flows to the Grande Ronde Basalt of the Columbia River
Basalt Group is based upon correlation of these lavas from their...
Full Text:
Volcanism and its Influence on Fluvial Sedimentation in an ArcAdjacent
Basin
by
Gary Allen Smith
A THESIS
Swash zone processes are of significant importance to foreshore morphologic change. This thesis addresses the importance of the uprush and backwash fluid motions and flow duration effects to the resulting sediment transport. The analysis relates the field observations to well known sediment transport formulations as well as investigates the importance...
Species relationships were investigated in a western North
American polyploid complex in the genus Aster (Asteraceae). A
combination of cytological, genetical, chemical, morphological and
numerical approaches was employed. Fifteen presently recognized
species were included in the study, and populations were sampled
throughout most of the range of the group. Living...
Mercury (Hg) is a bioaccumulative metal that can threaten the health of wild birds. Feathers are commonly used biomonitoring tools for non-lethally estimating Hg exposure in birds because they contain stable Hg concentrations upon completion of feather growth, when blood flow to the feather has stopped. Despite the common use...
Edible tree nut and peanut industries are important agricultural
industries in the United States. Major tree nuts produced
domestically are almonds, filberts, pecans,and walnuts. The United
States imports and exports some quantities of these tree nuts and
peanuts, but at the same time the U.S. imports cashew, brazil,
pignolia, and...
Future scenarios of global climate change rely on large-scale climate envelope models that do not account for local climatic conditions to which organisms most closely respond. Shifts in species distributions and phenology driven by climate change are well-documented, yet we lack a strong understanding of how climate change will influence...