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1.
Mol Ecol ; 13(11): 3329-44, 2004 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-15487993

RESUMEN

Comparative phylogeography can reveal processes and historical events that shape the biodiversity of species and communities. As part of a comparative research program, the phylogeography of a new, endemic Australian genus and species of log-dependent (saproxylic) collembola was investigated using mitochondrial sequences, allozymes and anonymous single-copy nuclear markers. We found the genetic structure of the species corresponds with five a priori microbiogeographical regions, with population subdivision at various depths owing to palaeoclimatic influences. Closely related mtDNA haplotypes are codistributed within a single region or occur in adjacent regions, nuclear allele frequencies are more similar among more proximate populations, and interpopulation migration is rare. Based on mtDNA divergence, a late Miocene-late Pliocene coalescence is likely. The present-day distribution of genetic diversity seems to have been impacted by three major climatic events: Pliocene cooling and drying (2.5-7 million years before present, Mybp), early Pleistocene wet-dry oscillations (c. 1.2 Mybp) and the more recent glacial-interglacial cycles that have characterized the latter part of the Quaternary (<0.4 Mybp).


Asunto(s)
Artrópodos/genética , ADN Mitocondrial/análisis , Variación Genética , Animales , Complejo IV de Transporte de Electrones/clasificación , Complejo IV de Transporte de Electrones/genética , Enzimas/genética , Evolución Molecular , Geografía , Haplotipos , Filogenia , Polimorfismo Conformacional Retorcido-Simple , Subunidades de Proteína/clasificación , Subunidades de Proteína/genética , Alineación de Secuencia , Australia del Sur
2.
West Indian med. j ; 44(Suppl 3): 17, Nov. 1995.
Artículo en Inglés | MedCarib | ID: med-5076

RESUMEN

In the Bahamas, a group of staff physicians, the Physician Alliance, proposed the privatization of selective health services in the public hospital, to provide universal access and availabiltiy of "modern" health care services at an affordable cost. The initial project outlined for the physician group to provide capital funds to establish and manage an Ultrasonic diganostic facility. Charges for procedures would reflect the government's subsidy of its public institution; reduced costs for procedures, differential fees for public patients and procedures, to be performed at no charge to the indigent patient. The hospital would provide the physical site, utilities and excise duties in the purchased equipment. Net profits were to be shared equally between the Hospital and the Physician group. The Physician Alliance provided an initial capital fund of US$86,000. The first year financial audit revealed fixed assets of $300,000. The one-year revenue of $270,000 yielded a 20 percent return to the physician share holders. The cost providing diagnostic services to indigent patients accounted for 7.4 percent of total revenues. The hospital, in addition to its profit share, collects 7 percent in management fees. Funds were allocated also for physicians to attend training courses in relevant diagnostic procedures and non-physicians to pursue certification courses to become ultrasound technicians. The privatization project is being expanded to include endoscopic equipment and an operating room surgical suite; capitalization projected - $800,000. We believe that selective privatization has advanced health care delivery in the public institution; simultaneously it has fostered physician involvement in the hospital's strategic planning and implementation of patient-related heath care services (AU)


Asunto(s)
Humanos , Privatización , Atención a la Salud , Economía Hospitalaria , Costos de la Atención en Salud , Bahamas
3.
Evolution ; 26(2): 203-220, 1972 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-28555745
5.
Evolution ; 22(4): 751-761, 1968 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-28562851
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