Though various chemical and microbiological methods have been developed for the estimation of vitamin Bs in whole (2-4) or in part (5), animal assays are still necessary for testing the accuracy of these new methods as they apply to animal nutrition. It is also important that the relative potency of pyridoxine, pyridoxamine, and pyridoxal for animals be known. Two different purified rations hav...

Blood plasma from snakes of the Brazilian poisonous Bothrops and the non-poisonous Eudryas is yellow-green in color and when observed through ultraviolet light (mercury lamp with Wood’s filter) presents an intense green-blue fluorescence. This observation has suggested to us a detailed study of the plasma pigments of some snakes. When the blood plasma proteins are precipitated with 50 per cent ...

The origins of the recorded history of occupational medicine are usually dated to the time of Hippocrates (c 460 BCE-c 370 BCE).' 2 Hippocrates's admonition to his followers to observe the environment of their patients was complemented by his descriptions of the diseases of certain occupations including those of metallurgists, fullers, tailors, horsemen, farmhands, and fishermen.' 2 Before Hipp...

this research intends to develop a method based on the artificial neural network (ann) to predict permanent earthquake-induced deformation of the earth dams and embankments. for this purpose, data sets of observations from 152 published case histories on the performance of the earth dams and embankments, during the past earthquakes, was used. in order to predict earthquake-induced deformation o...

Herbivorous reptiles rarely evolve occluding dentitions that allow for the mastication (chewing) of plant matter. Conversely, most herbivorous mammals have occluding teeth with complex tissue architectures that self-wear to complex morphologies for orally processing plants. Dinosaurs stand out among reptiles in that several lineages acquired the capacity to masticate. In particular, the horned ...

Earth-Shelter construction is one of the aspects in architecture where the thermal mass of the earth behind the outer walls are applied in order to reduce heat loss and keep the internal temperature at human comfort range. In case of earth-shelter buildings, housing is especially important. As for its applicability the earth-shelter provides good housing. Typological studies of earth-shelter co...