نتایج جستجو برای: hemoglobin f
تعداد نتایج: 360598 فیلتر نتایج به سال:
The recent article by Conley et al.1 on the lwneditary persistence of fetal hemoglobin presents some interesting data which relate to the etiology of thalassemia. Ingram and Stretton2 postulate that beta-tlmlassemia is due to a mutation within or close to the l)eta gene resulting in decreased beta chain production and a compensatory increase in delta chain ( hemoglobin A., ) and gamma chain (he...
During the first 86 years of Singapore's medical history (1819 to 1905), nobody was officially designated a "pathologist" although pathology was practised. All pathological work (purely medical or forensic) was done by non-specialist doctors. Representative cases are quoted so that conclusions can be drawn regarding what pathological practice was like and the problems faced. In 1905, the Govern...
Department of Biology, Neurobiology and Behavior Program, Georgia State University, Atlanta, GA 30302-4010 Brains and Behavior Program, Georgia State University Current Address: Department of Biology, Susquehanna University, Selinsgrove, PA 17870 Current Address: Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Ross 618, 720 Rutland Avenue, Baltimor...
The electricity reform in Colombia has exhibited gains in terms of reliability but its effects on firms efficiency and service quality have not been clear. Previous studies evaluating the performance of distribution companies after the reform have not found evidence of improvements, although large differences in efficiency have been found among firms. This suggests high inefficiency persistence...
AIMS Oral language is the foundation of literacy. Naturally, policies and practices to promote children's literacy begin in early childhood and have a strong focus on developing children's oral language, especially for children with known risk factors for low language ability. The underlying assumption is that children's progress along the oral to literate continuum is stable and predictable, s...
We formulated a mathematical model in order to study the joint influence of demographic and genetic processes on metapopulation viability. Moreover, we explored the influence of habitat structure, matrix quality and disturbance on the interplay of these processes. We showed that the conditions that allow metapopulation persistence under the synergistic action of genetic and demographic processe...
Conservation of species and ecosystems is increasingly difficult because anthropogenic impacts are pervasive and accelerating. Under this rapid global change, maximizing conservation success requires a paradigm shift from maintaining ecosystems in idealized past states toward facilitating their adaptive and functional capacities, even as species ebb and flow individually. Developing effective s...
This chapter examines the support already available for ful lling GA users' visualization requirements. Section 4.1 describes a range of visualizations available for showing the key characteristics of GAs suggested in the overview of EC (Chapter 2). Section 4.2 presents a brief overview of some systems which exemplify these key characteristics. Finally, Section 4.3 concludes this chapter with a...
Third parties such as trade associations often assist cartels by collecting and evaluating market behaviour at the firm level. Under incomplete information neutral market oversight helps to distinguish defecting from complying behaviour, increasing the effectiveness of punishments for defectors and increasing cartel persistence. We investigate how cartels sort themselves into different organiza...
1 Ocean currents, prevailing winds, and the hierarchical structures of river networks are 2 known to create asymmetries in re-colonization between habitat patches. The impacts of 3 such asymmetries on metapopulation persistence are seldom considered, especially rarely 4 in theoretical studies. Considering three classical models (the island, the stepping stone 5 and the distance-dependent model)...
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