منابع مشابه
Flavor - singlet hybrid baryons may already have been discovered
The splittings between the spin 1/2 and spin 3/2 iso-singlet baryons Λs(1405) and Λs(1520), and their charmed counterparts Λc(2593) and Λc(2625), have been a theoretical conundrum. Here we investigate the possibility that the QCD binding of color octets comprised of three quarks in a flavor singlet configuration is stronger than previously envisaged, allowing these states to be interpreted as h...
متن کاملMore taxonomists describing significantly fewer species per unit effort may indicate that most species have been discovered.
Recent studies show that there are more taxonomists describing species in recent decades than before. However, whether the rate of increase in number of taxonomists is greater than the rate of new species description has been questioned.We found a statistically significant decline in the proportion of species being described per number of taxonomists (i.e., authors of recent species description...
متن کاملCommentary: what might have been: Sullivan may have impacted modern prenatal alcohol research under different circumstances.
William Sullivan’s 1899 paper, ‘A Note on the Influence of Maternal Inebriety on the Offspring’, often cited as a precursor to modern fetal alcohol research, was published at a time when alcoholism was a topic of great interest in Europe and North America. Emerging theories of heredity, eugenics and temperance movements drove alcoholism research from 1860 to 1910. In addition to an upsurge of m...
متن کاملHallucial convergence in early hominids.
There is a richly documented fossil record of the evolutionary transition from ape-sized brains that are less that one-third the size of modern humans through a series of intermediate-sized brains up to the modern range. The first report on the discovery of the foot of the Stw 573 skeleton emphasized the apparent transitional nature of its great toe [Clarke, R.J., Tobias, P.V., 1995. Sterkfonte...
متن کاملThe Energetics of Encephalization in Early Hominids
Bioenergetics, the study of the use and transfer of energy, can provide important insights into the ecology and evolution of early hominids. Despite a relatively large brain with high metabolic demands, contemporary humans and other primates have resting metabolic rates (RMRs) that are similar to those of other mammals. As a result, a comparatively large proportion of their resting energy budge...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2018
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1719669115