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Wind-chill index for sheepBarnes, Timothy Ackley January 2010 (has links)
Digitized by Kansas Correctional Industries
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Point process noise in fundamental molecular reactions and invertebrate visionParag, Kris Varun January 2014 (has links)
No description available.
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Studies of androgenic gland in the mud crab: scylla paramamosain. / CUHK electronic theses & dissertations collectionJanuary 2004 (has links)
Liu Hong. / "September 2004." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (p. 241-269) / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.
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Detection of hyperthermia during capture of wild antelopeBroekman, Marna Suzanne 29 January 2013 (has links)
Capture of wildlife often leads to high animal mortality. In many species, capture is associated with development of a high body temperature. This stress-induced hyperthermia appears to form an integral part of capture-related mortalities, since it occurs before, during and after exposure to capture. I used two wildlife species, impala and blesbok, and exposed them to darting and net capture so as to investigate thermal and haematological changes that occur during capture. We implanted the animals with temperature-sensitive data loggers within the abdominal cavity (for core body temperature) and caudal aspect of the thigh (for muscle temperature). Activity loggers were tethered to the abdominal wall to measure locomotor activity. Blood samples were taken after capture when the animal became recumbent and another sample 10 minutes after the first sample in order to determine haematological changes. Impala had higher abdominal body temperatures during net capture in comparison to darting, whereas blesbok abdominal body temperatures did not differ between capture methods. Different species and individuals of the same species respond differently to various capture procedures. However, I found that irrespective of the capture event or whether impala or blesbok were captured, human presence before capture caused abdominal body temperatures to rise. Similar to thermal responses, there also was high variability between individuals in terms of blood variable concentrations used to quantify physiological responses to capture. Overall, blood variable changes (total protein, sodium, lactate, haematocrit, noradrenaline, adrenaline, potassium, creatine phosphokinase, pH) were similar for impala and blesbok in response to the two capture procedures. Cortisol values in blesbok however showed a greater response during darting whereas impala showed a greater response during net capture. Similarly, osmolality values showed a greater response during net capture whereas impala showed a greater response during darting. Both the species
showed that sodium and lactate correlated positively as well as noradrenaline and adrenaline correlated positively. The correlation between two variables allows us to measure only one of the variables, predicting the change of another. Unpredictable differences in thermal and blood variable measurements of impala and blesbok between different capture procedures did not allow me to correlate the thermal responses after a capture event to stress-related blood variables.
The issue of obtaining a practical and accurate measurement of the hyperthermic response during capture also often arises. Rectal temperature is currently the method of choice to determine body temperature in the field. I aimed to investigate whether muscle temperature measurement can be used as an alternative body temperature measurement in the field. When abdominal core body temperatures were high, muscle temperature measurements were close to and even slightly higher than the abdominal body temperature measurements in both the species. However, low abdominal body temperatures, muscle temperature measurements were at lower and much less accurate in predicting abdominal body temperatures. Muscle temperatures can therefore predict abdominal body temperatures with sufficient accuracy during a capture event, since animals respond to capture with elevated body temperatures thus increasing the similarity between the abdominal and muscle temperature measurements measured. One potential problem with muscle temperature, is that it may reflect exercise-induced temperature increases during capture, independently of a rise in abdominal body temperature. I found that the rise in muscle temperature was not only a result of the increase in activity during a capture event but rather as a result of stress-induced hyperthermia. The increase in activity only contributes to the overall hyperthermia of the animal.
The degree to which stress-induced hyperthermia contributes to mortality during capture is unclear. During my study, five impala died unexpectedly. Four impala died during the first trial while the fifth impala died before the completion of the last trial. I therefore compared the hyperthermic and haematological changes in surviving and non-surviving individuals. Both non-surviving and surviving impala in my study showed a rise in abdominal body temperature during the capture however the highest abdominal body temperatures occurred in individuals in both the surviving and non-surviving group. Very high abdominal body temperatures greater than 41ºC and 43ºC occurred in individuals of both the non-surviving and surviving animals, respectively. Some animals with an abdominal body temperature of 43ºC, therefore survived whereas other individuals died when experiencing abdominal body temperature of less than 41ºC. Blood variable responses (Creatine phosphokinase, glucose, potassium, calcium, sodium, lactate, osmolality, noradrenaline, adrenaline, pH) of the non-surviving individuals showed high values in comparison to the blood variable measurements of the surviving group. The blood variable measurements were however sampled late which will affect the measurements but can still be used to predicted mortality in the non-surviving impala.
The blood variable measurements therefore were associated with mortality in the non-surviving impala. In conclusion, whether stress-induced hyperthermia can be used as a sole measure to identify a compromised individual during a capture event and concomitantly enable us to give appropriate treatment is unclear. It is evident from my study that capture induced a hyperthermic response in excitable impala as well as in the much less excitable blesbok. My study is one of few systematic studies on capture stress and shows that body temperature used in conjunction with other parameters may be useful in estimating the degree of stress in captured animals, and thus predicting likelihood of mortality or morbidity. My
study also revealed that muscle temperature, possibly measured in the field by a needle-stab method, may provide an index of core body temperature.
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Metabolic injury to bacteria on freezing and storage.Kuo, Shou-Chang. January 1966 (has links)
No description available.
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Nutrient utilization in the aged human and rat as influenced by oral administration of antibacterial drugs.Fraser, Carolyn Margaret. January 1967 (has links)
No description available.
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Effects of ⁶⁰Co gamma irradiation on the reproductive performance of the brine shrimp, ArtemiaHolton, Robert L. 01 May 1968 (has links)
The brine shrimp, Artemia, was used as an experimental
organism to study the effects of ⁶⁰Co gamma irradiation on the reproductive
performance of an animal population. The total reproductive
ability of the brine shrimp was fractionated into various components
and the effects of irradiation on each of these components
was then determined by studies of reproductive behavior in individual
pair matings. In this study, the components identified were the
number of broods produced per pair, the number of nauplii voided
per pair, the number of nauplii voided per brood, the survival of
nauplii to sexual maturity, the number of mature adults produced
per brood, and finally the number of mature adults produced per pair.
All component parameters of total reproductive performance
were shown to be affected by irradiation. However, the number of
broods per pair was shown to be the factor most affected by doses
of 1200 rads or less.
The final parameter, the number of mature adults produced
per pair, is really the measurement of the net reproductive potential
of Artemia. The net reproduction was also examined by making
counts of the total population contained in three liter population cultures,
and contrasted to the results obtained with the pair mating
studies.
It was demonstrated that the population cultures may be maintained
by using only a small part of the reproductive potential exhibited
in the pair matings. Therefore, we find that the results of
pair matings must necessarily be used to assess the amount that the
reproductive potential of Artemia is decreased due to various doses
of irradiation.
It was determined that for Artemia irradiated at the most sensitive
stage, a dose of 2100 rads produced sterility. At less sensitive
stages, more than 3000 rads would be required to produce
sterility.
In a single experiment, Artemia irradiated with 300 rads gave
an indication of a slight enhancement of reproductive ability as compared
to the control animals. In all cases, doses of 600 rads or less
showed little effect on the reproductive ability of this species. / Graduation date: 1968
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The distribution and transfer of zinc-65 accumulated from food and seawater by three marine crustaceansFowler, Scott Wellington 20 December 1968 (has links)
Graduation date: 1969
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Growth response of a marine phytoplankton Coccolithus huxleyi to various chemical forms of cobaltLongaker, Harold L. 07 January 1974 (has links)
The results of a preliminary experiment suggested that a complexed
form of cobalt was more efficacious in promoting growth of a
marine phytoplankton than ionic cobalt. The phytoplankton used in this
experiment was Coccolithus huxleyi, a vitamin B₁₂ producer, and the
cobalt complex was cobalt (II)- ethylenediaminetetracetic acid [Co(II)-
EDTA]. A review of the biochemistry of vitamin B₁₂ indicates that a
B₁₂ producer might prefer, if not require, Co(III) instead of Co(II).
Since some of the Co(II)-EDTA in the preliminary experiment might
have become oxidized to Co(III)-EDTA, the observed stimulation of
growth could have been due to Co(III)-EDTA.
Two experiments were performed to determine if Co(III)-EDTA
is more efficacious in stimulating growth than Co(II)-EDTA. Coccolithus
huxleyi, grown in batch cultures with constant illumination, was
used in both experiments. One experiment had cobalt concentrations
of 10 and 1 μg/l; the other had concentrations of 1 and 0.1 μg/1. In
both experiments there were no observed differences in specific growth
rates between treatments of Co(III) as the EDTA complex with 10⁻⁶ M
additional EDTA and Co(II) with 10⁻⁶ M EDTA. Both of these treatments
resulted in a specific growth rate larger than controls without
added EDTA or cobalt. It is not possible to measure the amount of
Co(II)-EDTA that is oxidized to Co(III)-EDTA at the concentrations
used in these experiments. Consequently these results cannot be used
as a basis for rejecting the hypothesis that Co(III) is the required form
of cobalt. Since Co(III)-EDTA without the additional 10⁻⁶ M EDTA was
apparently able to stimulate growth in relation to the controls, it is
assumed that C. huxleyi is capable of utilizing this form of cobalt. / Graduation date: 1975
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Effects of nicotinic acid on respiratory exchange ratio and blood-borne substrate levels during exerciseHeath, Edward M. 07 December 1990 (has links)
Graduation date: 1991
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