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Articles 1 - 9 of 9
Full-Text Articles in Medicine and Health Sciences
Arkansas Cooperative Beef Bull Performance Test 1991, M. W. Eaton, A. E. Brown Jr., J. A. Hornsby, R. W. Parham, J. D. Shockey, W. C. Loe
Arkansas Cooperative Beef Bull Performance Test 1991, M. W. Eaton, A. E. Brown Jr., J. A. Hornsby, R. W. Parham, J. D. Shockey, W. C. Loe
Arkansas Agricultural Experiment Station Research Series
Performance testing of beef bulls was initiated to improve productivity of Arkansas beef cattle through breeding. This cooperative testing program provides cattlemen with reliable information for identifying animals with superior breeding value for the traits of production measured in the test. By using the information as a basis for herd sire selection, a breeder can greatly increase the chances of obtaining a bull that will sire rapid-gaining, more efficient, highquality calves. Such calves can increase profits for both the breeder and the feeder. This testing program provides information that is useful to financial institutes in arranging their lending programs and …
Use Morality As Basis For Animal Treatment, Kenneth J. Shapiro
Use Morality As Basis For Animal Treatment, Kenneth J. Shapiro
Experimentation Collection
No abstract provided.
Effect Of Age On The Structure Of Meissner Corpuscles In Forepad Digital Pads Of Mice, Roger C. Mathewson
Effect Of Age On The Structure Of Meissner Corpuscles In Forepad Digital Pads Of Mice, Roger C. Mathewson
Loma Linda University Electronic Theses, Dissertations & Projects
Meissner corpuscles in forepaw digital pads of albino mice were examined by light and electron microscopy to determine structural age-changes. After 1.5 months of age, no intraepidermal nerve fibers were seen extending from corpuscles. From young (1.5-6 months) to middle age (9-15 months), corpuscles became larger and more complex, gaining more horizontally arranged terminals, associated lamellae and connective tissue. At old age (18-26 months), corpuscles became small and lobulated, appearing disorganized. There was no loosening of the corpuscle-epidermal interface. An increase in collagenous connective tissue and basal lamina duplication occurred with advancing age. Ultrastructural age-changes consisted of disorganization of the …
Histomorphometric Analysis Of Primate Periodontal Tissues Following Corticotomy In Orthodontics, Wuiteng Koh
Histomorphometric Analysis Of Primate Periodontal Tissues Following Corticotomy In Orthodontics, Wuiteng Koh
Loma Linda University Electronic Theses, Dissertations & Projects
The purpose of this study was to evaluate the prevalence of specific cell types and structures at the active tooth movement site in corticotomized and non-corticotomized specimens obtained from a previous study, and to consider the hypothesis that corticotomy facilitated orthodontics is efficacious due to an inflammatory response rather than tooth-bone block movement. Specimens from 3 monkeys, each of which had a treatment and control quadrant in each arch, were sectioned, mounted on glass slides, and stained with Giemsa, haematoxylin, and Safranin stains. A histomorphometric analysis was performed with DataVoice™, a voice activated computer system which allowed for digitization of …
The Role Of T Cells In The Pathogenesis Of Periapical Lesions, John B. Wallstrom
The Role Of T Cells In The Pathogenesis Of Periapical Lesions, John B. Wallstrom
Loma Linda University Electronic Theses, Dissertations & Projects
The pulps of mandibular molars of 15 athymic and 15 conventional rats were surgically exposed and left open to their oral flora. Each group was divided into 3 subgroups of 5 animals each. The rats were sacrificed after their pulps were exposed for 2, 4, or 8 weeks. After fixing, decalcifying, and embedding, the specimens were sectioned and stained with H and E. They were then examined under a microscopic grid and quantified by percentages of surface areas of bone, connective tissue, bone marrow, intrabony spaces, periapical lesions, and numbers of osteoclasts. This was done using a DataVoice computerized data …
Catecholamines And The Regulation Of Uterine Contractions In The Pregnant Rhesus Macaque, Cahleen Mae Mcnutt
Catecholamines And The Regulation Of Uterine Contractions In The Pregnant Rhesus Macaque, Cahleen Mae Mcnutt
Loma Linda University Electronic Theses, Dissertations & Projects
This study was designed to test the hypothesis that: 1) maternal and/or amniotic fluid catecholamines or prostaglandins display nocturnal activity rhythms similar to those of the myometrial contractility in the pregnant rhesus macaque and, 2) catecholamines stimulate prostaglandin production by fetal membranes. Paired maternal arterial blood and amniotic fluid samples were collected at 0900 h (AM) and 2100 h (PM) from chronically catheterized rhesus macaques until delivery and analyzed for prostaglandin metabolites (PGFM and PGEM-II) and catecholamines (norepinephrine, epinephrine, and dopamine). Uterine activity data was continuously recorded. A rhythm in uterine contractility was observed, with peak activity between 1900 and …
Topographic Development Of The Corticocollicular Projection In The Neonatal Rat, F. Allen Richburg Ii
Topographic Development Of The Corticocollicular Projection In The Neonatal Rat, F. Allen Richburg Ii
Loma Linda University Electronic Theses, Dissertations & Projects
The density and distribution of labeled cortical cells was examined following discrete deposits of retrograde tracers into the superior colliculus (SC) of neonatal and adult rats to study the topographic order of SC afferents from the cortex during the initial phase of axon ingrowth. Small deposits of red and green latex microspheres (0.02-0.05ul) were placed into the SC of rats ranging in age from birth to adulthood using glass micropipettes (tip diameter 25-35um). The animals, following a 48hr survival period, were deeply anesthetized and perfused with normal saline followed by a 10% formal-saline solution. The brains were sectioned coronally at …
Animals In Biomedical Research: The Undermining Effect Of The Rhetoric Of The Besieged, John P. Gluck, Steven R. Kubacki
Animals In Biomedical Research: The Undermining Effect Of The Rhetoric Of The Besieged, John P. Gluck, Steven R. Kubacki
Experimentation Collection
It is correctly asserted that the intensity of the current debate over the use of animals in biomedical research is unprecedented. The extent of expressed animosity and distrust has stunned many researchers. In response, researchers have tended to take a strategic defensive posture, which involves the assertation of several abstract positions that serve to obstruct resolution of the debate. Those abstractions include the notions that the animal protection movement is trivial and purely anti-intellectual in scope, that all science is good (and some especially so), and the belief that an ethical consensus can never really be reached between the parties.
Reflective Ethology, Applied Philosophy, And The Moral Status Of Animals, Marc Bekoff, Dale Jamieson
Reflective Ethology, Applied Philosophy, And The Moral Status Of Animals, Marc Bekoff, Dale Jamieson
Experimental Research and Animal Welfare Collection
Currently there is an unprecedented interest in ethological studies of nonhuman animals. Much of this interest is motivated by a desire to learn more about animals themselves. For scientists assuming this stance, a secondary goal is to use this knowledge to assess the place of humans in the natural order of things, stressing continuity or discontinuity depending on one's views. Others, however, study animals primarily to apply this knowledge to human behavior. We argue that behavioral research demands the rigorous application of methods that are minimally harmful to the animals being studied. We argue for a moderate, but rigorous and …