Life Sciences Commons^™

Studies Of Cesium-137 Metabolism By Blatta Orientalis In Various Thermal Environments., Tsin Fu Chuang

Biology ETDs

The effect of temperature on cesium-137 metabolism in the oriental cockroach, Blatta orientalis, was studied. Adult and nymphal animals were fed cesium-137 to investigate the biological half-time, excretion rate, retention curve and distribution of the isotope among body tissues.

Metabolic rate studies at different temperatures showed an exponential relationship between oxygen consumption and temperature. The Q₁₀ was 2.56 for adults and 2.20 for nymphs in the 10 C – 35 C range.

Cesium-137 elimination rate increased as environmental temperature increased. The Q₁₀ for cesium-137 elimination was constant (1.2) over the 15 C – 35 C range and greatly …

Sporicidal Efficiency Of Dimethyl Sulfoxide, Various Disinfectants, And Their Combinations For Four Strains Of Bacillus, William L. Lappenbusch

Biology ETDs

This study was concerned with the sporicidal efficiency of dimethyl sulfoxide (DMSO), various disinfectants, and their combinations or complexes. Spores of Bacillus subtilis var. niger (globigii), Bacillus cereus, Bacillus subtilis (5230), and Bacillus stearothermophiluswere used to demonstrate the sporicidal activity of DMSO, phenol, Clorox, phenylmercuric nitrate, silver nitrate, Roccal, merthiolate, and iodine. Dimethyl sulfoxide has been shown in the past to enhance the penetration of neighboring substances which it encounters whether it be by the formation of a complex or by a reservoir effect in which DMSO causes a change in the osmotic concentrations on either side of a semipermeable …

Isolation, Identification And Antibiotic Sensitivity Of Enteric Obligate Anaerobes In Cases Of Gastro-Enteritis., Gordon E. Newlin

Biology ETDs

Organisms capable of living in the absence of atmospheric oxygen were first described in 1861. However, it was not until almost forty years later that anaerobes were discovered to be associated with the human body. From 1900 until the present, most work with anaerobes concerned media and methods to promote the growth of these organisms. Their classification has been attempted, but their taxonomy still remains in a state of confusion. Rarely, and only in rather obvious cases, has the pathogenicity of these organisms been investigated. Consequently, these organisms and their relationship to pathogenicity remain relatively unknown to bacteriologists today.

Va Survey Of Intestinal Helminths Occurring In Dogs From Albuquerque, New Mexico, Ronald P. Hathaway

Biology ETDs

In recent years there have appeared numerous publications dealing with intestinal helminth of dogs and the relationships of these helminths to public health. Although several species of helminths that normally infect dogs recently have be found to infect humans, most of these parasites are unable to complete their life cycles in man and are destined to wander aimlessly through tissues, bringing about a condition known as visceral larva migrans. The importance of such helminths as Toxocara canis and Ancylostoma canium in relation to human disease has been pointed out by Beaver et al. (1952) and Beaver (1956, 1959).

Distribution And Ecology Of The Bats Of Southern Hidalgo County, New Mexico, Jay Dee Druecker

Biology ETDs

This study has two objectives: (1) to determine the species composition and ecologic and geographic distribution of the chiropteran fauna in southern Hidalgo County, New Mexico, (2) to record the time and air temperature during periods of utilization of water holes by the species of bats found in the study area.

Most of the 1,250 specimens examined in this study were taken in mist nets over streams, ponds, and metal stock tanks. A few individuals were collected in day roosts, night roosts, hibernacula or by shooting. Most of the specimens are [reserved as standard museum study skins and skulls or …

A Comparative Floristic Study Of Mount Taylor And Redondo Peak, New Mexico, Neal L. Osborn

Biology ETDs

For several years, there has been an intensified interest and activity in floristic studies of various areas in New Mexico, especially of certain well-isolated mountain masses characteristic of many mountainous areas in New Mexico. Many of these mountain masses are, in effect, islands of Montane Biota separated from other islands by lower and drier mesa and valley barriers. Botanists realize a need to investigate thoroughly the floras of these areas with one another to reveal possible modifications in flora composition or species differences that may have arisen as a result of geographic isolation and subsequent changes in gene frequencies.

Heat Exposure And 137-Cesium Distribution In Citellus Spilosoma, Noel Savignac

Biology ETDs

Radiocesium ( ¹³⁷Cs) is formed in high yield from nuclear fission and has a long physical half-life, 27 yr. These facts plus ready absorption by the gastrointestinal tract (Hamilton, 1947) make cesium one of the most dangerous fission products and as such has provided impetus for the study of ¹³⁷Cs metabolism from the standpoint of both physical characteristics and health physics. As a portion of these investigations, the effects of temperature changes, specifically elevated environmental temperatures, were studied with the intent of demonstrating physiological factors involved in ¹³⁷Cs uptake and retention by animals native to semiarid environments. …

Some Developmental Aspects Of The Bacula Of Lasiurus And Antrozous, Modesto Del Castillo

Biology ETDs

A means of aging Lasiurus cinereus by bacular measurement was sought. The study indicated that linear measurements of the baculum cannot be used as a means of aging.

A histological study of the development of the baculum of Antrozous pallidus was conducted. The animals used in the study ranged in age from two days to eight weeks. The study showed that the structure is not preformed in cartilage.