...Charles Tyne, one of the chief elders in Konobo District, Grand Gedeh County, states that, “the Krahn ethnic group is divided into sixteen groups. They are Konobo, Tchien, Glio, Twarbo, putu, Gorbo, Kanneh, Gbo, Plo, Gbobo, Gbarbo, Glarlo, Gbarzon, Sarpo, Niao, and Gbee” . Nothing much is known about the Krahn people concerning their lifestyle. Krahn settlements consist of a small number of mud huts with cone-shaped roofs made of palm leaves or thatch. These huts are grouped irregularly around a center court that serves as a meeting place. In a particular locality, a clan composed of a local lineage dominates. “Each extended family has a headman, who offers sacrifices to the ancestral spirits” . This person serves as watchman for his family just as Ezekiel has being a watchman over the Israelites. The headman is succeeded by his oldest sister's eldest son, who then leaves his own compound to assume his new role...
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...Light-Induced Rod and Cone Cell Death and Regeneration in the Adult albino Zebrafish (Danio rerio) Retina Thomas S. Vihtelic and David R. Hyde Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana 46556-0369 Received 24 January 2000; accepted 25 April 2000 ABSTRACT: Light-induced photoreceptor cell degeneration has been studied in several species, but not extensively in the teleost fish. Furthermore, the continual production of rods and cones throughout the teleost’s life may result in regeneration of lost rods and cones. We exposed adult albino zebrafish to 7 days of constant darkness, followed by 7 days of constant 8000 lux light, followed by 28 days of recovery in a 14-h light:10-h dark cycle. We characterized the resulting photoreceptor layer cell death and subsequent regeneration using immunohistochemistry and light microscopy. Within the first 24 h of constant light, the zebrafish retina exhibited widespread rod and cone cell apoptosis. High levels of cell proliferation within the inner nuclear layer (INL) were observed within the first 3 days of Light has been an effective and popular environmental method to experimentally induce photoreceptor cell degeneration. The light treatment can irreversibly cause photoreceptor cell loss through apoptosis (Shahinfar et al., 1991; Li et al., 1996). Factors such as light intensity and exposure duration, length of dark adaptation before light exposure, and ocular pigmentation influence the retinal damage in mice...
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