Stimulated Population Growth Research Articles

The African paradox of growth and development

Africa with approximately 550 million people accounts for about 11.4% of the worlds estimated 4.8 billion. It has by far the highest birth rate of any world region: 45/1000 population compared with an estimated 27/1000 for the whole world. Africa also has the highest death rate of any continent and about 45% of its population is under age 15. The speed with which population growth can be brought under control will be a critical factor in determining Africas ultimate population size. Throughout Islamic-Arabic North Africa pronatalist forces are still quite strong even though the region also boasts the continents greatest family planning successes. 1 obstacle to the spread of family planning in North Africa is the low status of women as viewed from a Western perspective. Kenya is characterized by development contrasts; Kenya has experienced recent rapid declines in mortality yet the pronatalist forces operating there are among the strongest on the continent. For the more than 80% of Kenyans who live and work on the land children are seen as essential to survival and status. Ironically some of Kenyas recent development successes may have inadvertently stimulated population growth. Nigeria the most populous African nation contains within its borders enormous cultural and geographic contrasts; its moist equatorial climate causes high levels of ill health and mortality. The Nigerian government is now strongly supportive of population control measures as long as they are voluntary with the emphasis on family health and child spacing rather than limitation. Africas demographic extremes range widely. The net effect of all the forces now in effect almost guarantees extremely high population growth rates on the African continent in the years ahead.

Circulating Catecholamines in Cats Before and After Lethal Head Injury

SummarySeveral particulate compounds such as Celite, glass powder, tin oxide, diamond powder, and three different cellulose products, Microcrystalline Cellulose, Solka Flok, and Cellophane Spangles, stimulated population growth in C. briggsae. Since inert diamond particles form a poor adsorbent, and since large particles did not enter the gut of the nematode, our results suggest that stimulation is not the result of nutrient adsorption or phagocytosis, but rather due to the physical presence of particles.

The growth-promoting activity of several lipid-related compounds in the free-living nematode Caenorhabditis briggsae.

SummaryThe growth-promoting activities of a number of lipid-related chemical compounds were studied in C. briggsae. It was found that several such compounds, Tween 80 (20 mg/ml), Tween 85 (10 mg/ml), sodium oleate (1.0 mg/ml), sodium stearate (1.0 mg/ml), ethanol (4.0 mg/ml), n-propanol (4.0 mg/ml), and potassium acetate (5.0 mg/ml), greatly stimulated population growth in C. briggsae and were much more potent than a casein hydrolysate (casamino acids). These findings have led to the recognition of a lipid-related factor for C. briggsae and to the successful development of a completely chemically defined medium for the cultivation of C. briggsae without the presence of a protein-aceous factor.

Demographic impact of introducing modern medicine to a subsistence-level agrarian population: A simulation

Typical of many peasant communities in the Third World, the highland Indian population of Nunoa, Peru operates close to its capacity for providing members with adequate nutrition. High birth and mortality rates maintain population stability in groups such as this. The introduction of modern medical services could decrease mortality and stimulate population growth, thus upsetting stability of the population size.

The Social Regulation of Population Density and Age-Sex Distribution in the Toque Monkey

The Social Regulation of Population Density and Age-Sex Distribution in the Toque Monkey

Culture Contacts and Population Growth

The population growth of native peoples is an inevitable result of European cultural incursion. The expansion of Europe carries in its wake a disruption of the balance of numbers in non-European societies. The populations, especially of preliterate peoples, tend to be transformed from relatively stationary, near optimal numbers to aggregates which follow the Malthusian law of the increasing pressure of numbers on the food supply. The disequilibrium thus created is apparently neither guided nor restrained by the motives, expectations, and plans of either the cultural invader or the culturally invaded. It seems rather to follow from impersonal forces which weaken population checks and stimulate population growth.