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Drop-covered surfaces in the landscape such as dew covers cause increased reflection of the incident light in a direction towards the light source, so-called retroreflection. Surveyable registration in the form of imagery of retroreflected light from pound surface and vegetation, for instance from an airplane, may provide valuable climatological and biological information. Different factors influencing the retroreflection are treated in the paper. Among these the lens-effect of the drops is dealt with in detail, and goniophotometric experiments with laser light are mentioned. An active remoteasensing system for registration of retroreflected light from drop-covered surfaces is described. The system Consists of a laser scanner equipped with an image-producing device. Laboratory tests with the apparatus are presented as well as planned activities with the equipment. [ABSTRACT FROM AUTHOR]

The article reports on the announcement of two Kurt H. Thoma awards for the best original papers on the science and practice of clinical, diagnostic, or experimental oral pathology. The awards, to be presented at the annual meeting of the American Academy of Oral Pathology in Montreal, will consist of a commemorative plaque and a cash award.

On the basis of plasma lipoprotein patterns, five types of familial lipoproteins have been identified. The author discusses the chemistry and metabolism of plasma lipoproteins, proposed classification, and clinical laboratory diagnosis and treatment of familial lipoproteinemias. [ABSTRACT FROM AUTHOR]

Heavy metal ions were absorbed by lichens to different degrees in laboratory experiments. The relative capacities for uptake from solutions containing a single metal ion were Fe, Cu >Ni> Pb>Co>Zn. Competitive uptake studies revealed the selectivity sequence Fe≫Pb>Cu≫Ni, Zn>Co. The sequences are in accord with a cation uptake mechanism involving ion exchange modified by metal-complex formation. Correlations between laboratory studies and the metal content of lichens growing in the vicinity of a smelter are discussed. [ABSTRACT FROM AUTHOR]

By the use of the Crosby-Kugler capsule jejunal mucosal biopsies have been obtained from patients with various skin disorders and non-diarrhoeal gastrointestinal diseases. A preliminary report is presented regarding the correlation between stereomicroscopic and light microscopic findings. [ABSTRACT FROM AUTHOR]