Comparative study of the digestive system of three species of tinamou. I. Crypturellus tataupa, Nothoprocta cinerascens, and Nothura maculosa (Aves: tinamidae).

The morphology and histology, as well as the cytochemistry of complex carbohydrates, of the digestive system of Crypturellus tataupa (tataupa tinamou), Nothoprocta cinerascens (brushland tinamou), and Nothura maculosa (spotted tinamou) are described. The general morphology of the digestive system of these birds follows the basic model of the avian alimentary canal, although statistical analysis shows that the lengths of the organs are significantly different among the species. From cephalic to caudal regions the alimentary tract consists of esophagus, ingluvies or crop, proventriculus or glandular stomach, ventriculus or muscular stomach, small intestine, well-developed ceca, and rectum.

Cytochemical localization of sorbitol dehydrogenase in kidney and liver from Myiopsitta m. monachus (Boddaert, 1783), during embryonic development.

A histochemical study to determine the localization of sorbitol dehydrogenase (SDH) in kidney and liver from embryionic, young and adult Myiopsitta m. monachus was performed. The enzyme activity increased with age in both organs.

Optical remote sensing of atmospheric turbulence: a comparison with simultaneous thermal measurements.

In this paper we describe a two-part experiment: measuring atmospheric turbulence both optically and thermally from 2 km up to the stratosphere. The consistency of the results shows that the optical technique may be a powerful tool for studying atmospheric turbulence from ground-based equipment.

Daytime r(0) evaluated from vertical microthermal measurements.

The usefulness of parameter r(0) for describing the effect of atmospheric turbulence on wavefront distortion sensitive optical systems has been widely discussed. In this paper we present in situ daytime r(0) measurements (5500 A, Zenith propagation) obtained from balloon-borne microthermal radiosondes. We find that the parameter r(0) is log normal distributed at various levels aloft and that r(0) follows a power law in the 100-10,000-m range.

Sorbitol dehydrogenase in Anas platyrhynchos and Zenaida auriculata auriculata during development.

Sorbitol dehydrogenase (E.C.N.