Titlebook: Immunology and Developmental Biology of the Chicken; Olli Vainio,Beat A. Imhof Book 1996 The Editor(s) (if applicable) and The Author(s),

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E. W. Müllner,H. Dolznig,H. Beugimate change mitigation measures. Desirable long-term emission targets cannot be determined without value judgments. However, atmospheric CO. concentration stabilization at 550 ppm CO. or 550 ppm CO.-eq is a reasonable target when taking into account several factors including climate mitigation cost

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C. D. Sternplant. This chapter discusses the impact of the nuclear accident on Japanese energy and climate policies. Section 10.1 focuses on the impact on the future of Japan’s energy sector. The earlier subsections discuss the impact on the energy and power system, and point out the importance of Demand Activ

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Book 1996buted substantially to our understanding of basic immunology, including the graft-vs. -host reaction, the clonal reactivity of immunocompetent cells, sepa­ ration of the T and B cell lineages, somatic diversification of the B cell repertoire by immunoglobulin (Ig) class switching, anti­ body diversi

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,Chicken γδ T Cells,nd human γδ T cells have revealed many interesting differences in the biology of γδ vs. αβ T cells, such as tissue distribution, repertoire restrictions, requirement for a thymus for their development, and lack of classical MHC restriction (for reviews see . 1993; . et al. 1993; . 1994; . and . 1995

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,T Cell Subsets and the Activation of γδ T Cells,s are numerous in the intestinal epithelium and can support IgA responses. In contrast, Vβ2. cells are rare in the intestinal epithelium and, either because of this or because of an unknown functional characteristic, are unable to provide help for IgA responses (. et al. 1991).

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T Cell Migration During Ontogeny and T Cell Repertoire Generation,tive to the aortic region migrate via the circulation and colonize the spleen, yolk sac, and finally the bone marrow. However, recent studies have shown that the stem cells produced in these different organs during ontogeny may correspond to different populations generated separately since they do n