منابع مشابه
Disease and Development: A Reply to Bloom, Canning, and Fink
Beginning in the 1940s, a wave of health innovations and more effective international public health measures led to a rapid and large improvement in health; for example, in some relatively poor countries, life expectancy at birth quickly rose from around 40 years to over 60 years. In Acemoglu and Johnson ð2006, 2007Þ, we constructed an instrument for these changes in life expectancy: “predicted...
متن کاملHeat penetration and thermocouple location in home canning
We processed applesauce, tomato juice, and cranberries in pint jars in a boiling water canner to test thermal processing theories against home canning of high-acid foods. For each product, thermocouples were placed at various heights in the jar. Values for f h (heating), f cl (cooling), and F 82.2°C (lethality) were determined for each thermocouple location, and did not depend substantially on ...
متن کاملA parasite pioneer
The concept that infectious biological agents were responsible for many diseases was controversial in the midnineteenth century. But key experiments by famed scientists such as Louis Pasteur and Robert Koch eventually won over sceptics. However, some other researchers, equally convinced by this notion, and who also carried our convincing experiments in its support at the same time, have failed ...
متن کاملGreen recovery of pectic polysaccharides from citrus canning processing water
Canned citrus segments are popularly consumed worldwide with a large global market. However, the production needs chemical treatment to remove segments membranes, producing a large amount of acidic and basic effluents with very high chemical oxygen demand (COD), causing serious environmental problems. This research is focused on the plant scale recovery of pectic polysaccharides from the above ...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1881
ISSN: 0036-8733
DOI: 10.1038/scientificamerican08131881-97a