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Showing 1 to 20 of 154 for “"incubation period"”.
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The incubation period of AIDS
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A further study of the incubation period of the age-hardening of aluminum-copper alloys
… directly to the aging temperature, explains the incubation period that precedes steady state nucleation. This incubation period arises from the comparatively slow rate of diffusion of solute atoms in forming the equilibrium concentration of critical size embryos which must be achieved before …
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Mechanisms of Prion Strain Interference
… and the type of prion strain affects the disease incubation period, clinical signs, and neuropathology. Prions can exist as a mixture of strains in a host, and one implication of prion mixtures is that prion strains can interfere with one another. In prion strain interference, a blocking strain …
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Nucleation of the isothermal martensitic transformation in iron-nickel-manganese alloys
… and electrical resistance measurements, the incubation period (time to form a detectable amount of martensite) and the initial nucleation rate have been determined as a function of subzero reaction temperature and austenitic grain size in three iron-nickel manganese alloys containing 23-25 …
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Analysis and implementation of robust numerical methods to solve mathematical models of HIV and Malaria co-infection
… effect of a distributed delay representing the incubation period for the malaria parasite in the mosquito vector to possibly reduce the initial transmission and prevalence of malaria. This model can be regarded as a generalization of SEI models (with a class for the latently infected mosquitoes) …
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Incubation behavior, embryonic heart rate, and developmental variation within and among altricial bird species
The incubation period of an egg is a critical stage that has multiple implications in subsequent life stages, therefore understanding the processes within the egg during the incubation period are important for a broader understanding of avian development and life history strategies. I examined …
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Certain biological comparisons of resistant and non-resistant strains of the German cockroach, Blattella Germanica (Linnaeus)
… and DDT were compared with a normal strain as to incubation period of eggs, developmental period of nymphs, and longevity of adults. The resistant strains were more heterogeneous than the normal, with the exceptions of the chlordane-resistant males and females of the nymphal developmental study …
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Application of plant tissue and organ culture in soybean improvement for resistance to Septoria glycines
… Fayette, and one breeding line, L1615. The incubation period for S. glycines in progeny of resistant plants (cv. BSR201) obtained from immature embryo was five weeks longer than the incubation period in susceptible plants. The resistant plants were small, but not all small plants were …
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Chemosensory Evaluation of Prostate Cancer Cells
… Specific factors that will be investigated are incubation period and cell population. For all three cell lines, two cell populations of 75,000 and 150,000 cells were cultured and tested after 2, 8, 12, and 24 hours using a conducting polymer based hand-held electronic nose. Multivariate analysis …
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Pathogenicity and taxonomy of fungi associated with the mountain pine beetle in British Columbia
… isolates of G. clavigera. After a 48 week incubation period, isolates ATCC 18086, B5 and H55 had induced stronger pathogenic indicators compared to isolates KW 1407 and B20. After a 7 week incubation period, only isolate ATCC 18086 had induced stronger pathogenic indicators. Usually, this …
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Comparison between the subsurface environment of brown trout (Salmo trutta) redd and nonredd sites in two North Carolina streams
… North Carolina streams were studied during the incubation period in 1979-1980 and 1980-1981. Intragravel water temperature, dissolved oxygen concentration, and percent oxygen saturation were highly correlated with surface water measurements, indicating that intragravel water is of surface …
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Symptomatic or secondary parotitis with special reference to etiology
… any organ of the body. There is no definite incubation period of Symptomatic Parotitis. And the condition is not infectious,it must however be regarded as a serious complication of any disease.
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The Effect of Poly-L-Lysine Concentration, Molecular Weight, and Encapsulation Temperature on Microencapsulated Bovine Spermatozoa
… .25%, and .35%) did not differ over the 8 h incubation period. However, the viability of each of the four treatments was lower than that of the unencapsulated control (p<.05 and p<.01; percentage motility and percentage intact acrosomes, respectively), indicating spermatozoal damage occurred …
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Knowledge Level of Adolescents About HIV and AIDS in a Frontier Community
The average incubation period of HIV is approximately . eight years. Many AIDS patients between the ages of 20-29 years were likely infected as adolescents. A total of 480 questionnaires were distributed among middle school students in a frontier community. Results concluded that knowledge level …
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Thermal Tolerances of an Endemic Hot Spring Snail Physella wrighti Te and Clarke (Mollusca: Physidae)
… if water temperature would affect the snail’s period of greatest activity, behaviour, survivability, number of egg masses produced, number of eggs per mass, egg volume, egg mass viability, and incubation period. I found no differences in activity level and no difference in behaviour except …
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Localization of trehalose synthesis and degradation in Ascaris
… to identify C14trehalose synthesized during the incubation period. It was found that the reproductive tissues of both male and female Ascaris possess a mechanism for trehalose synthesis. Intestinal tissue and muscle showed no capability for trehalose synthesis under conditions of the incubation. …
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Strain improvement and characterization of antibiotic producing microorganisms from soil
… parameter such as pH, Temperature and incubation period. The results revealed 7 strains of antibiotic producing organisms. 4 bacterial strains demonstrated convincing growth inhibitory properties against pathogenic test organisms. Of these, were identified as Gram-positive cocci and 1 …
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Use of 15N2 for direct measurement of free-living N2 fixation
… regarding soil sampling, storage, and incubation. Such methodological constraints, including the presence of nitrogenous contaminants, a lack of atmospheric uniformity, and incomplete description of procedural details, are eliminated with a technique comprehensively described herein, …
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Effects of high incubation temperature on the developing small intestine and yolk sac of broiler chicks with insight into goblet cell development in the small intestine early posthatch
The incubation period is crucial for development and overall quality of a chick. The selection for fast growing broilers has allowed the birds to reach market weight at a faster rate making the incubation period a larger portion of a broiler's life. A faster growth rate can lead to the release of …
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Aerosol exposure biotesting for package integrity testing
… for test organism growth after a 72 hour incubation period. Pouch contamination via microbial ingress was significant (P < .05) for test organism motility (motile) and concentration (10<sup>6</sup> cells/mL).
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