Results 41 to 50 of about 2,806,878 (338)

Rusia en África. Nuevas dinámicas desde el Kremlin [PDF]

open access: yesRevista UNISCI, 2022
Hace menos de una década, el continente africano era prácticamente la última prioridad de la política exterior de Rusia. Atrás quedaron las décadas doradas en las que el peso de la URSS se hacía notar en niveles como la ideología, las infraestructuras ...
Sebastián Ruiz-Cabrera
doaj  

Identifying Key Challenges Facing Healthcare Systems In Africa And Potential Solutions

open access: yesInternational Journal of General Medicine, 2019
Introduction Healthcare systems in Africa suffer from neglect and underfunding, leading to severe challenges across the six World Health Organization (WHO) pillars of healthcare delivery.
O. Oleribe   +7 more
semanticscholar   +1 more source

Liothrips tractabilis sp.n. (Thysanoptera: Phlaeothripinae) da Argentina, um Potencial Agente de ControleBiológico da Planta Daninha Campuloclinium macrocephalum (Asteraceae) na África do Sul [PDF]

open access: yes, 2008
A new species, Liothrips tractabilis, is described from northern Argentina. Feeding by this thrips causes severe damage to the leaves of Campuloclinium macrocephalum, a plant that has been introduced to South Africa where it is a serious weed of ...
Mound, Laurence   +1 more
core   +2 more sources

Mapping HIV prevalence in sub-Saharan Africa between 2000 and 2017

open access: yesNature, 2019
HIV/AIDS is a leading cause of disease burden in sub-Saharan Africa. Existing evidence has demonstrated that there is substantial local variation in the prevalence of HIV; however, subnational variation has not been investigated at a high spatial ...
L. Dwyer-Lindgren   +40 more
semanticscholar   +1 more source

Desafíos petroleros para América Latina y África ante la expansión asiática [PDF]

open access: yes, 2016
La menor dependencia por parte de Estados Unidos de importaciones de crudo ha causado una reducción de los envíos desde América Latina y África. También Asia ha realizado esfuerzos por diversificar las fuentes de suministro para satisfacer su demanda ...
Guerrero, Diego, Hernández, Igor
core   +2 more sources

HIV Infection and AIDS in Sub-Saharan Africa: Current Status, Challenges and Opportunities

open access: yesOpen AIDS Journal, 2016
Global trends in HIV infection demonstrate an overall increase in HIV prevalence and substantial declines in AIDS related deaths largely attributable to the survival benefits of antiretroviral treatment.
A. Kharsany, Q. Karim
semanticscholar   +1 more source

Taxonomic revision of the tropical African group of Carex subsect. Elatae (sect. Spirostachyae, Cyperaceae) [PDF]

open access: yes, 2011
The tropical African monophyletic group of Carex subsect. Elatae (sect. Spirostachyae) is distributed in continental tropical Africa, Madagascar, the Mascarene archipelago, and Bioko Island (32 km off the coast of West Africa, in the Gulf of Guinea ...
Escudero Lirio, Marcial   +1 more
core  

Plasmodium falciparum gametogenesis essential protein 1 (GEP1) is a transmission‐blocking target

open access: yesFEBS Letters, EarlyView.
This study shows Plasmodium falciparum GEP1 is vital for activating sexual stages of malarial parasites even independently of a mosquito factor. Knockout parasites completely fail gamete formation even when a phosphodiesterase inhibitor is added. Two single‐nucleotide polymorphisms (V241L and S263P) are found in 12%–20% of field samples.
Frederik Huppertz   +5 more
wiley   +1 more source

4‐nitrobenzoate inhibits 4‐hydroxybenzoate polyprenyltransferase in malaria parasites and enhances atovaquone efficacy

open access: yesFEBS Letters, EarlyView.
Atovaquone is an antimalarial requiring potentiation for sufficient efficacy. We pursued strategies to enhance its activity, showing that 4‐nitrobenzoate inhibits 4‐hydroxybenzoate polyprenyltransferase, decreasing ubiquinone biosynthesis. Since atovaquone competes with ubiquinol in mitochondria, 4‐nitrobenzoate facilitates its action, potentiating ...
Ignasi Bofill Verdaguer   +7 more
wiley   +1 more source

Guerra colonial : uma aliança escondida [PDF]

open access: yes, 2009
Em 1970 teve início uma profunda transformação das relações entre Portugal e a África do Sul, depois de uma reunião de alto nível em Pretória, entre delegações dos dois países.
Afonso, Aniceto
core  

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