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Cholinesterase activity in the neural retina of the developing chick

Creator:: Rynd, Lori Suzanne
Abstract:: Developmental changes in the enzymes acetylcholinesterase (EC 3.1.1.7) and pseudocholinesterase (EC 3.1.1.8) were examined in ovo and in vitro in the neural retina of the developing chick. In addition, investigations of cellular interactions and hormones as possible control mechanisms of enzyme synthesis were made. The specific activity of acetylcholinesterase, a...
Resource Type:: Dissertation
Full Text:: acetylcholinester- ase (EC 3.1.1.7) and pseudocholinesterase (EC 3.1.1.8) were examined in ovo and in vitro in the

Endoparasitic gastropods of Puget Sound holothurians

Creator:: Tikasingh, Elisha Seujit
Resource Type:: Dissertation
Full Text:: in taeir capsules in mature animals (Fig. 1, EC). Tne wall of this cavity consists of a layer of

A spectrophotometric study of protein and deoxyribonucleic acid in nuclei of varying Y chromosome dosage in Drosophila melanogaster (Meigen)

Creator:: Swedberg, Gertrude Laliah Salmon
Resource Type:: Masters Thesis
Full Text:: - between, but riost rC(fltiy and. xit ec enbiveiy, it has been cnrcted with nucleic acid production or

Studies on the biology of two ambystomid and five plethodontid salamanders of western Oregon

Creator:: Freiburg, Richard Eighme
Resource Type:: Dissertation
Full Text:: Gastronoda 1. Arthropode. Isopoda Liidiuxn gracile 7 Araneida unideitified adults 2 I n s ec ta

Morphological variations in populations of Lacerta from islands in the Adriatic Sea

Creator:: Clover, Robert C.
Abstract:: Phenetic relationships in insular populations of Lacerta sicula and L. melisellensis correspond to geologic ages of the islands in two regions of the Adriatic Sea. Populations of L. melisellensis on older islands are more similar to populations of L. sicula than are L. melisellensis from younger islands, and examination of...
Resource Type:: Dissertation

Chemical cues and the molecular basis of olfactory chemoreception in caudate amphibians

Creator:: Kiemnec, Karen M.
Abstract:: Chemoreception is one of the dominant sensory modalities for many species of salamanders (reviewed in Chapter 2). At least seven of the ten currently recognized salamander families are known to respond to some sort of chemical cue. These responses are as varied as delaying hatching, seeking refuge, or initiating aggressive...
Resource Type:: Dissertation

The effects of an emerging pathogen on amphibian host behaviors and interactions

Creator:: Han, Barbara A.
Abstract:: Contemporary environmental change encompasses massive biodiversity loss and increasing numbers of emerging diseases worldwide. As part of a global biodiversity crisis, amphibians are disappearing at unprecedented rates. Batrachochytrium dendrobatidis is an emerging infectious pathogen prominently associated with many declines. Chapter 1 reviews the past decade of research on this system...
Resource Type:: Dissertation

Drought, dispersal, and community dynamics in arid-land streams

Creator:: Bogan, Michael T.
Abstract:: Understanding the mechanisms that regulate local species diversity and community structure is a perennial goal of ecology. Local community structure can be viewed as the result of numerous local and regional processes; these processes act as filters that reduce the regional species pool down to the observed local community. In...
Resource Type:: Dissertation

The roles of nutrient dynamics, oceanography, and light in the structure and functioning of rocky intertidal macrophyte assemblages

Creator:: Close, Sarah L.
Abstract:: The influence of the physical environment on organisms has long been a subject of ecological research. But, the complex drivers of environmental variation, and the multiple scales at which this can occur, make studying this topic a difficult challenge. In rocky intertidal habitats, oceanographic- and climate-scale variability influence benthic communities...
Resource Type:: Dissertation

Aquatic community responses to drought disturbance: experimental manipulations of top predator extinctions and stream drying

Creator:: Boersma, Kate S.
Abstract:: Although it is generally assumed that the intensifying abiotic environment is the primary effect of drought on aquatic organisms, drought-induced top predator extinctions may be an important underlying mechanism. I used manipulative experiments to disentangle the impacts of drying and top predator extinctions on arid-land aquatic invertebrate communities. I then...
Resource Type:: Dissertation

ScholarsArchive@OSU

Cholinesterase activity in the neural retina of the developing chick

Endoparasitic gastropods of Puget Sound holothurians

A spectrophotometric study of protein and deoxyribonucleic acid in nuclei of varying Y chromosome dosage in Drosophila melanogaster (Meigen)

Studies on the biology of two ambystomid and five plethodontid salamanders of western Oregon

Morphological variations in populations of Lacerta from islands in the Adriatic Sea

Chemical cues and the molecular basis of olfactory chemoreception in caudate amphibians

The effects of an emerging pathogen on amphibian host behaviors and interactions

Drought, dispersal, and community dynamics in arid-land streams

The roles of nutrient dynamics, oceanography, and light in the structure and functioning of rocky intertidal macrophyte assemblages

Aquatic community responses to drought disturbance: experimental manipulations of top predator extinctions and stream drying

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