Establishment of the West African Currency Board and East African Anomalies

Author(s):  
Wadan Narsey
Genome ◽  
2011 ◽  
Vol 54 (11) ◽  
pp. 898-910 ◽  
Author(s):  
P. Somta ◽  
S. Chankaew ◽  
O. Rungnoi ◽  
P. Srinives

Bambara groundnut ( Vigna subterranea (L.) Verdc.) is an important African legume crop. In this study, a collection consisting of 240 accessions was analyzed using 22 simple sequence repeat (SSR) markers. In total, 166 alleles were detected, with a mean of 7.59 alleles per locus. Allelic and gene diversities were higher in the west African and Cameroon/Nigeria regions with 6.68 and 6.18 alleles per locus, and 0.601 and 0.571, respectively. The genetic distance showed high similarity between west African and Cameroon/Nigeria accessions. Principal coordinate analyses and neighbor-joining analysis consistently revealed that the majority of west African accessions were grouped with Cameroon/Nigeria accessions, but they were differentiated from east African, central African, and southeast Asian accessions. Population structure analysis showed that two subpopulations existed, and most of the east African accessions were restricted to one subpopulation with some Cameroon/Nigeria accessions, whereas most of the west African accessions were associated with most of the Cameroon/Nigeria accessions in the other subpopulation. Comparison with SSR analysis of other Vigna cultigens, i.e., cultivated azuki bean ( Vigna angularis ) and mungbean ( Vigna radiata ), reveals that the mean gene diversity of Bambara groundnut was lower than azuki bean but higher than mungbean.


2006 ◽  
Vol 17 (1) ◽  
pp. 53-70
Author(s):  
John M. Carland

Résumé Entre 1901 et I9I0, quarante pour cent des pièces de monnaie frappées au Royaume-Uni circulaient dans les pays britanniques de la côte ouest de l'Afrique. Cette situation n'était certes pas vue d'un bon oeil; d'une part, le British Treasury craignait les effets que pourrait avoir une repatriation soudaine de la monnaie alors que, d'autre part, le Colonial Office qui avait la responsabilité de voir au bien-être des colonies, enviait les profits réalisés par le Treasury qui détenait le pouvoir de faire frapper les pièces. Pour remédier au problème et assurer un meilleur contrôle, on institua donc, en 1912, le West African Currency Board (WACB). Le British Treasury et le Colonial Office furent intimement liés à la création et aux premières activités du WACB mais cette liaison prit la forme d'une lutte pour le contrôle de cette commission. Bien qu'on ait. jusqu'à date, toujours pensé que c'est le Treasury qui a eu la haute-main sur l'affaire, cette étude démontre, au contraire, que c'est le Colonial Office qui a réussi à dominer la situation et à prendre la commission sous sa tutelle. Pour faire état du comment et du pourquoi de cette prise de pouvoir, l'auteur décrit les mécanismes par lesquels le WACB fut créé et mis en opération au cours des années 1911-12, les modes selon lesquels on a rapatrié l'argent britannique des pays africains pendant les années 1912-14 et la controverse qui entoura la demande du Treasury d'être représenté au sein du WACB. Selon l'auteur, les décisions ont toujours favorisé le Colonial Office et il est évident que ce sont ses intérêts qui ont toujours prévalu.


1973 ◽  
Vol 11 (1) ◽  
pp. 141-144
Author(s):  
Simeon I. Ajayi

One of the major concerns of Nigeria, Gambia, Ghana, and Sierra Leone during the operation of the West African Currency Board was the alleged relationship between the money supply and the balance of payments. It was argued by critics that changes in foreign exchange reserves tended to exert a preponderant influence on the monetary base, the main determinant of the money stock – which, in turn, is a good indicator of the thrust of monetary forces. The aim of this note is to discover the extent to which the monetary authorities have influenced the ‘base’ since the establishment of the Central Bank of Nigeria.


2017 ◽  
Vol 2 ◽  
pp. 10 ◽  
Author(s):  
Nicholas Revett Rolle ◽  
Matthew Faytak ◽  
Florian Lionnet

In this paper we investigate the distribution of vowel systems in the Macro-Sudan Belt, an area of Western and Central Africa proposed in recent areal work (Güldemann 2008, 2011; Clements & Rialland 2008). We report on a survey of 615 language varieties with entries coded for two phonological features: advanced tongue root (ATR) harmony and the presence of interior vowels (i.e. non-peripheral vowels, such as [ɨ ɯ ɜ ə ʌ …]). Our results show that the presence of ATR harmony in the Macro-Sudan Belt is limited to three separated zones: an Atlantic ATR Zone, a West African ATR Zone, and an East African ATR Zone, all geographically unconnected to one another. We additionally show that between the West and East African ATR Zones is a geographically extensive, genetically heterogeneous region of Central Africa where ATR harmony is systematically absent which we term the Central African ATR-less Zone. Our results also show a large region where phonemic and allophonic interior vowels are disproportionately prevalent, which we term the Central African Interior Vowel Zone. This zone noticeably overlaps with the Central African ATR-less Zone, suggesting that ATR and interiority have an antagonistic relationship. Chi-squared tests support the presence of a strong relationship between the two types of vowel contrasts.


Parasitology ◽  
1988 ◽  
Vol 96 (1) ◽  
pp. 25-36 ◽  
Author(s):  
G. J. Vos ◽  
S. K. Moloo ◽  
P. R. Gardiner

SUMMARYTo determine if, as is the case withTrypanosoma bruceiandT. congolense, serodemes ofT. vivaxcould be distinguished on the basis of immunity to the metacyclic stages of the parasite, attempts were made to immunize goats by infection with infected tsetse, followed by chemotherapy or eventual ‘self-cure’. Thirty goats were infected by tsetse with either clones or stocks ofT. vivaxfrom East or West Africa. Twenty-four goats were treated with diminazene aceturate (Berenil, Hoechst A.G.) 2–6 weeks after infection and 6 goats were allowed to self-cure. Infection, followed by treatment, induced immunity to a first homologous challenge by infected tsetse in only 2 of 24 goats (one immune to the East African stock, and the other to a clone of the West African stock). Immunity to a clone of the East African stock was induced in 3 or 4 animals after a second infection and treatment and in the fourth animal of the group following a third infection and treatment. One of 2 goats infected with the clone of the East African stock was immune to challenge at 16 weeks, following self-cure without treatment, and 1 of 4 goats infected with the parent stock was similarly immune when challenged at 40 weeks post-infection. Goats susceptible to infection with East AfricanT. vivaxshowed evidence of partial immunity by delayed pre-patent periods and depressed parasitaemias after challenge. Goats infected with the relatively more virulent West AfricanT. vivaxwere, however, completely susceptible to infection after homologous challenge, and showed only a slight delay in pre-patent period. A similar result was obtained in a further 8 goats primed and challenged by large numbers of tsetse (20 or 100 infected tsetse/goat) with the West AfricanT. vivax. In further experiments using a very short treatment interval, infections following challenge were clearly shown to be the result of a lack of immunity rather than relapse following treatment. Lytic antibody activity to cultured metacyclic trypanosomes could not be detected during infection but such activity against bloodstream forms was detected after 2 weeks of infection. It is suggested that the primary reason for the erratic induction of immunity toT. vivaxemploying this methodology is the low number of metacyclics transmitted by infected tsetse, and thus poor antigenic stimulus encountered by goats upon tsetse challenge.


2018 ◽  
Vol 27 (2) ◽  
pp. 107-118 ◽  
Author(s):  
C.H.F. Rowell ◽  
N.D. Jago ◽  
C. Hemp

The East African forest genus Aresceutica Karsch is revised; there are now four valid species, including A.nguruensis, sp. n. from south eastern Tanzania. Aresceutica is extremely similar to the West African genus Serpusia; it differs only in the form of the prosternal tubercle and the detail of the phallic morphology. Two new combinations are proposed: Ptemoblaxlemarineli Bolívar, 1911 = Aresceuticalemarineli (Bolívar, 1911), comb. n. and Aresceuticavansomereni Kevan, 1956 = Duviardiavansomereni (Kevan, 1956), comb. n.


Sign in / Sign up

Export Citation Format

Share Document