One of the central problems in migration measurement arises as a consequence of the different sources of migration data. Most information regarding migration is obtained from population censuses or population registers that report migration data for a given time interval. Another source of migration data is the sample survey which may be designed to provide information about both migrants and...

A cloned mouse liver cell model (NCTC 1469) treated with either ethanol or one of its metabolites, acetaldehyde or acetate, was used to study proline uptake. Beginning with the stationary phase of cell growth, 14C-proline uptake was markedly accelerated by both ethanol and acetaldehyde (p less than 0.001). When ethanol treatment was combined with 4-methyl pyrazole so as to block ethanol oxidati...

"This paper attempts to describe the nature of Zambia's demographic situation, which eventually led to the formulation of a national population policy; the policy instrument; and some of the measures necessary for the effective implementation of the policy....[The] situation is characterised by three dominant features: a high rate of natural increase, massive urbanisation, and wide variations ...

Expression analysis of crop plants has improved our knowledge about the veiled underlying mechanisms for salt tolerance. In order to observe the time course effects of salinity stress on gene expression for enzymes regulating proline metabolism, we comparatively analyzed the expression of specific genes for proline metabolism in root and shoot tissues of salt-tolerant (cv. Dunkled) and salt-sen...

1. Recta of desert locusts were short-circuited and depleted of endogenous substrates by exposing them to saline containing cyclic AMP but no metabolites. Individual substrates were then added to substrate-depleted recta and the change in short-circuit current (/sc) monitored. 2. Proline or glucose (50 mil) caused by far the largest increase in 780 of all substrates tested. Stimulation of the 7...

response of tea plants to b deficiency was studied in hydroponic medium under environmentally controlled conditions. plants height, number of leaves and dry matter production of shoot and root were significantly decreased by b deficiency. concentration of chlorophyll, carotenoids, anthocyanins and flavonoids was not affected by b deficiency in the young leaf, while a significant reduction of ch...

Response of tea plants to B deficiency was studied in hydroponic medium under environmentally controlled conditions. Plants height, number of leaves and dry matter production of shoot and root were significantly decreased by B deficiency. Concentration of chlorophyll, carotenoids, anthocyanins and flavonoids was not affected by B deficiency in the young leaf, while a significant reduction of Ch...

in order to study the response of coriander medicinal plant to salt stress, two experiments were conducted for germination and vegetative stages. this study was carried out as a factorial experiment based on completely randomized design with three replications. the treatments were salinity at five concentrations including 0, 25, 50, 75 and 100 mm nacl. response of coriander seeds germination in...