scholarly journals Camilla Toulmin, Land, investment and migration. Thirty-five years of village life in Mali

2021 ◽  
pp. 167-169
Author(s):  
Volker Stamm
Keyword(s):  
Author(s):  
Camilla Toulmin

This book describes the choices open to farming families in the Sahelian village of Kala, in central Mali. Life in this drought-prone region is harsh and full of risk to health, crops, and livestock, yet there are also opportunities open to the hard-working, audacious and lucky, bringing considerable returns if the timing is right. Three inter-related themes underlie the analysis of production and investment decisions faced by households; the role of risk, the long timeframe within which decisions are made, and the close links between economic performance and household size and organisation. Climatic variability and demographic uncertainty lie at the heart of domestic structures; the extreme vulnerability faced by single individuals means people cluster in large kin-based groups, pooling risks and providing protection. The very limited development of labour markets means that households rely almost entirely on their own members for their workforce, and generating the capital needed for investing in ploughs, wells, carts and livestock must stem from a good year’s grain surplus and migration earnings. Based on field-research over the period 1980-82, this study illustrates a successful response to making ends meet in a land abundant region, despite high risks of drought. A follow-up study of this village was published in 2020: Land, Investment, and Migration. Thirty-five years of village life in Mali (OUP).


Author(s):  
A. W. Sedar ◽  
G. H. Bresnick

After experimetnal damage to the retina with a variety of procedures Müller cell hypertrophy and migration occurs. According to Kuwabara and others the reactive process in these injuries is evidenced by a marked increase in amount of glycogen in the Müller cells. These cells were considered originally supporting elements with fiber processes extending throughout the retina from inner limiting membrane to external limiting membrane, but are known now to have high lactic acid dehydrogenase activity and the ability to synthesize glycogen. Since the periodic acid-chromic acid-silver methenamine technique was shown to demonstrate glycogen at the electron microscope level, it was selected to react with glycogen in the fine processes of the Müller cell that ramify among the neural elements in various layers of the retina and demarcate these cells cytologically. The Rhesus monkey was chosen as an example of a well vascularized retina and the rabbit as an example of a avascular retina to explore the possibilities of the technique.


Author(s):  
H. Hashimoto ◽  
Y. Sugimoto ◽  
Y. Takai ◽  
H. Endoh

As was demonstrated by the present authors that atomic structure of simple crystal can be photographed by the conventional 100 kV electron microscope adjusted at “aberration free focus (AFF)” condition. In order to operate the microscope at AFF condition effectively, highly stabilized electron beams with small energy spread and small beam divergence are necessary. In the present observation, a 120 kV electron microscope with LaB6 electron gun was used. The most of the images were taken with the direct electron optical magnification of 1.3 million times and then magnified photographically.1. Twist boundary of ZnSFig. 1 is the image of wurtzite single crystal with twist boundary grown on the surface of zinc crystal by the reaction of sulphur vapour of 1540 Torr at 500°C. Crystal surface is parallel to (00.1) plane and electron beam is incident along the axis normal to the crystal surface. In the twist boundary there is a dislocation net work between two perfect crystals with a certain rotation angle.


Author(s):  
Marieke Goedhart ◽  
Stephanie Gessel ◽  
Robbert van der Voort ◽  
Edith Slot ◽  
Beth Lucas ◽  
...  

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