Physiology Commons^™

A Light And Electron Microscopic Study Of Visual Neurons In The Medulla Externa Of The Crab Hemigrapsus Nudus, Yu Cheng Liao

Loma Linda University Electronic Theses, Dissertations & Projects

The decapod crustacean with a relatively well-defined visual system have contributed significantly to our understanding of visual neuron morphology and physiology. The general morphology of the optic lobes of several decapods were initially described by Parker (1897) and Hanstrom (1924). In the past few years, several light and electron microscope studies have been made on the lamina ganglionaris: the first optic ganglion, of the lobster (Hamori and Horridge, 1966a); the crayfish (Hafner, 1974; Nassel, 1976a), and the crab (Stowe et al., 1977; Rafuse et al., in preparation). As yet, no adequate description has been made of the visual neurons in …

The Effect Of Ergosterol On The Desaturation Of 14c-Labeled Oleic Acid In Tetrahymena, Maynard E. Neville Jr.

Masters Theses

The ciliated protozoan Tetrahymena pyriformis-Strain W desaturated ¹⁴C-labeled fatty acid substrate in both sterol supplemented (ergosterol) and nonsupplemented cultures. Cis-octadecenoic acid (¹⁴C-9-18:1), when added to the medium during the log phase of growth, was incorporated into the cells and also desaturated at the Δ⁶ and Δ¹² positions. The ¹⁴C labeled substrate and products, linoleate (9,12-18:2) or linolenate (6,9,12-18:3) were recovered and separated by silver-nitrate Unisil column chromatography. Initially, recovery of ¹⁴C compounds varied widely when expressed as the percent of total counts per minute recovered from column chromotography, and a variety of …

Cytotypes And Morphometrics Of Two Phyllostomatid Bats, Micronycteris Hirsuta And Vampyressa Pusilla, Robert J. Baker, Hugh H. Genoways, William J. Bleier, Jerry W. Warner

University of Nebraska State Museum: Mammalogy Papers

As pointed out by Jackson (1971) and Patton (1972), the key to understanding mechanisms of chromosomal evolution lies in studies of chromosomal variation within populations that can hybridize. Hybrids between cytotypes contain the answer to problems of meiotic pairing and reduced fertility, as well as information concerning the nature of zones of contact. However, before detailed studies can be initiated, chromosomal races and hybrid zones must be located. Few chromosomal races have been described for bats (Baker, 1970a). Within the family Vespertilionidae, five species are known to have such races (Baker, 1970a) and races have been reported in two species …

Physiological Comparison Of Plaque-Producing And Non-Plaque-Producing Streptococci With Emphasis On Mannitol Utilization, Brenda Castle

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Brenda Castle on July 19, 1973.

Freeze Branding For Cattle Identification On The Farm, C P. Mcdougall, R. C. Burking

Journal of the Department of Agriculture, Western Australia, Series 4

CATTLE identification presents many problems to beef and dairy farmers, and also to research workers. Although many methods are available no one simple method appears to be the complete answer.

This article describes the technique of freeze branding for cattle identification on the farm.

Observations On The Effects Of Flufenamic Acid On Cells In Vitro, Rick Truman Waterman

University of the Pacific Theses and Dissertations

The role of inflammation poses a number of interesting facets. Frequently it appears as a mechanism of defense: at other times it appears to present itself as a pathologic situation of unknown etiology. In neither case have the underlying mechanisms been fully identified. A variety of tissues can be involved, but when occurring as a pathology entity, it is more frequently observed in the synovial tissues. As a general rule, inflammation used as a defense mechanism in benign and self- limiting. This is not the case whore it become matter of pathology. It is here where mankind has looked for …

Birth Weights Of Calves : Report Of A Calf Weighing Project At Wokalup Research Station, Maurice C. Cullity

Journal of the Department of Agriculture, Western Australia, Series 4

SINCE 1957, all calves born on Wokalup Research Station have been weighed as close to b i r th as possible and detailed birth weight records have been kept for all phases of the Station's breeding activities.