منابع مشابه
Into the 20th Century
At the beginning of the 20th century descendants of the early European settlers who first colonized the coasts of Virginia, the Carolinas, and Georgia were established throughout the region. Most all of the native people had been displaced. Cotton was king. The mature forests were being . the southern world, wavered and then toppled. Demand for the South’s cotton declined due to new competition...
متن کاملA reversal of the socioeconomic gradient of nuptiality during the Swedish mid-20th-century baby boom
BACKGROUND Research into the causes of the mid-20-century baby boom has concluded that the main proximate cause of the fertility increase during the 1940s was earlier and more universal marriage in the cohorts born after 1910, and that this association between nuptiality trends and fertility was particularly strong in Sweden. OBJECTIVE However, we do not know whether this was a general trend or...
متن کاملWhat caused the epidemic of Pneumocystis pneumonia in European premature infants in the mid-20th century?
An epidemic of interstitial pneumonia principally involving premature infants occurred in Germany and nearby European countries between the 1920s and 1960s. Fatalities were due to Pneumocystis. Because the principal defenses against Pneumocystis are T cells, an acquired T-cell deficiency was postulated. A number of potential causes including malnutrition were considered. All were implausible ex...
متن کاملThe Challenge of Antibiotic-Resistant Staphylococcus: Lessons from Hospital Nurseries in the mid-20th Century
In the late 1940s, epidemics of antibiotic-resistant strains of Staphylococcus aureus began to plague postpartum nurseries in hospitals across the United States. Exacerbated by overcrowding and nursing shortages, resistant S. aureus outbreaks posed a novel challenge to physicians and nurses heavily reliant on antibiotics as both prophylaxis and treatment. This paper explores the investigation o...
متن کاملMathematics in the 20th Century
If you talk about the end of one century and the beginning of the next you have two choices, both of them difficult. One is to survey the mathematics over the past hundred years; the other is to predict the mathematics of the next hundred years. I have chosen the more difficult task. Everybody can predict and we will not be around to find out whether we were wrong. But giving an impression of t...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2015
ISSN: 1538-4357
DOI: 10.1088/0004-637x/815/1/9