Pouvoir mystique, sorcellerie et structure sociale chez les Rukuba (Benue-Plateau State, Nigeria)

L Homme ◽  
1971 ◽  
Vol 11 (3) ◽  
pp. 71-111 ◽  
Author(s):  
Jean-Claude Muller
1972 ◽  
Vol 27 (1) ◽  
pp. 33-45
Author(s):  
Peter Mathias

Le but de cet article n'est pas de dégager des déterminations nouvelles à la révolution industrielle en Angleterre, ou d'établir de nouveaux critères de sa singularité. On a souvent mis en avant de multiples facteurs explicatifs : la situation favorable en ressources naturelles, les mouvements démographiques d'une structure sociale souple et mobile, une demande intérieure en extension (et particulièrement une demande croissante de la part des groupes à revenus moyens), les progrès d'une agriculture spéculative, le développement d'une tradition industrielle à base rurale, un marché extérieur et des colonies, des capitaux disponibles, un génie inné de l'invention, l'esprit d'innovation ou d'entreprise, le non-conformisme protestant, un système de gouvernement qui sut favoriser à différentes époques l'intervention et le laissez-faire selon un dosage propice, une législation encourageant l'efficacité de la concurrence et de l'économie de marché, des connaissances et une attitude scientifiques, des mobiles et des motivations psychologiques.


L Homme ◽  
1975 ◽  
Vol 15 (1) ◽  
pp. 5-27 ◽  
Author(s):  
Jean-Claude Muller
Keyword(s):  

Author(s):  
Agustina Onyebuchi Ijeomah ◽  
Rebecca Ngoholve Vesuwe ◽  
Bitrus Pam

Vegetables growing in mining areas have become a serious food safety concern because of the high levels of heavy metals always associated with mining. In this study, water used for irrigation, soil, cabbage, green pepper and green beans grown in tin mine areas of Heipang District, Barkin-Ladi LGA of Plateau State were analyzed for lead, cadmium and zinc, using Atomic Absorption Spectrophotometer (AAS). The concentrations of the heavy metals in water, soil, vegetables were all in the order Pb, >> Cd > Zn. In the vegetables, the order was: Pb → cabbage > green beans > green pepper; Cd → green beans > cabbage > green pepper; Zn → cabbage > green pepper = green beans. The transfer factors for all the metals (heavy metal in plant / heavy metal in soil) ranged from 0.95 to 1.48. There were high levels of Pb and Cd in all the vegetables, which may be attributed to the metals in the water used for irrigation. Whilst the concentration of Zn in all the samples were lower than recommended limits, the levels of Pb and Cd in the water, soil and vegetables were higher than the WHO/FEPA standard recommended limits reported for vegetables. The Cd concentrations of the vegetables also exceeded the tolerance thresholds for animals and human beings and therefore consumption of vegetable from the area would endanger the health of the population.


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