The ultraviolet circular dichroism spectrum of a chloroplast fraction of Antirrhinum ma jus has recently been published The fraction was obtained from stroma-freed chloroplasts by ultrasonic treatment and fractioning centrifugation2-3. The spectrum shows extrema of ellipticity at 194 ( + ) , 208 ( ) and 222 ( —) nm. Thus it is similar to a protein with a considerable a-helix content. G R E E N ...

This paper examines an infinite family of proximity drawings of graphs called open and closed ß-drawings, first defined by Kirkpatrick and Radke [15, 21] in the context of computational morphology. Such proximity drawings include as special cases the well-known Gabriel, relative neighborhood and strip drawings. Complete characterizations of those trees that admit open /^-drawings for 0 < ß < iz...

George L. Petrikkos, Associate Professor, 1st Department of Propedeutic Medicine, Athens University School of Medicine, Laiko, General Hospital, GR-115 27 Athens (Greece) From the previous very interesting presentations the following main points can be outlined: Dr. Höffken noted that the isolation of the agent responsible for respiratory tract infections (RTIs) is desirable, but it is difficul...

Wound healing is a complex process that relies on proper levels of cytokines and growth factors to successfully repair the tissue. Of particular interest are the members of the transforming growth factor family. There are three TGF-ß isoforms-TGF- ß 1, 2, and 3, each isoform showing a unique expression pattern, suggesting that they each play a distinct function during development and repair. Pr...

Microdialysis sampling of lipophilic molecules in human tissues is challenging because protein binding and adhesion to the membrane limit recovery. Hydroxypropyl-ß-cyclodextrin (HP-ß-CD) forms complexes with hydrophobic molecules thereby improving microdialysis recovery of lipophilic molecules in vitro and in rodents. We tested the approach in human subjects. First, we determined HP-ß-CD influe...

BACKGROUND AND OBJECTIVES This study examined the association of physical activity and sedentarism with tobacco and alcohol consumption, and adherence to the Mediterranean diet in teenagers of both genders. METHODS A total number of 1897 Spanish teenagers (12-16 year-olds) took part in the present cross-sectional study. The variables were measured by means of questionnaires previously validat...

The fungus Penicillium purpurogenum was found to produce intracellular ß-glucosidase. Maximum activity of ß-glucosidase was observed on sucrose. Various cultural parameters of cultivation of P. purpurogenum for production of ß-glucosidase were optimized. Maximum enzyme content was observed after 96 hours of cultivation at 30°C. Addition of amino acids histidine and cysteine induced ß-glucosidas...

It has been shown that inflammation reduces the effectiveness of sympathetic nerves in the regulation of knee joint blood flow, and the joint vascular- ß adrenoceptors are changed due to acute inflammation from a majority of ß-1 to an equality of ß-1 and ß-2 receptors.. To investigate the role of sympathetic nerves in nerve induced vasoconstriction and changes in joint vascular ß-adrenoceptors ...