This investigation presents a new way to look at the numerical khipu, Shirts a knotted-string recording device from Pachacamac (Peru), and the types of information it contains.In addition to celestial coordinates, khipu knots apparently pertain to an early form of double-entry accounting.This study hypothesizes that the khipu sample has the recordi
Abstract Background The Y chromosome of Drosophila melanogaster harbors several genes required for male fertility.The genes for these fertility factors are very large in size and contain conspicuous amounts of repetitive DNA and transposons.Three of these loci (ks-1, kl-3 and kl-5) have the ability to develop giant lampbrush-like loops in primary s
Fire is an important agent of disturbance in tropical savannas, but relatively few studies have analyzed how soil-and-litter dwelling arthropods respond to fire disturbance despite the critical role these organisms play in nutrient cycling and other biogeochemical processes.Following the incursion of a fire into a woodland savanna ecological reserv
BACKGROUND: Schistosomiasis japonica remains a significant public health problem in China and Southeast Asian countries.The most typical and serious outcome of the chronic oriental schistosomiasis is the progressive granuloma and fibrosis in the host liver, which has been a major medical challenge.However, the molecular mechanism underling the hepa