[Automatic regeneration of capillary dialysers].

First results of an automatically working regeneration apparatus for capillary dialysators in 200 dialyses allow the on an average tenfold use of the dialysator CDAK 4. In this case a reduction of the effective surface to 70% of the initial value must be taken into bargain. Pyrogenic reactions or bacterial contamination of the regenerated dialysators were not taken into consideration.

Effect of linocmycin on the chlorophyll protein complex I content and photosystem I activity of greening leaves.

1. Greening barley and pea leaves treated with lincomycin have a reduced chlorophyll content. Lincomycin dose not alter the proportion of chlorophyll in chlorophyll-protein complex II (CPII) but greatly reduces that in chlorophyll-protein complex I (CPI).

Sunlight and cataract: an epidemiologic investigation.

Cataract prevalence data from two large U.S. sources were divided according to small geographic areas for which average annual sunlight hours were determined from a map prepared by the U.

Senile cataract extraction and diabetes.

A study of hospital discharge diagnoses from both national data and data from a local medical centre indicates that diabetes substantially increases the probability of cataract extraction at age 40-49, about doubles or triples the probability for age 50-69, and has little effect on risk at age 70 and over. Strengths and weaknesses of the data are discussed. Other reports, generally estimating a much stronger association between diabetes and probability of cataract extraction, at least at age 50 and above, are critically evaluated.

Blindness from glaucoma.

We observed an overall ratio of 8:1 for nonwhite to white primary glaucoma blindness. Our fragmentary evidence suggested that the ratio of underlying disease, that is, nonblinding glaucoma or intraocular pressure differentials, may be closer to 2:1 than 8:1 as between nonwhites and whites. The remaining four fold differential can be explained by a combination of the following: more complete reporting for nonwhites, reporting for medical care later in the disease than whites, and poorer response to treatment for nonwhites compared to whites.

Respiratory inhibition in Chlorella produced by "purified" polyethylene glycol 1540.

Polyethylene glycol 1540, added to culture solution in amounts sufficient to reduce the water potential to -10 atmospheres, inhibited respiration in Chlorella much more than mannitol solutions at -10 atmospheres. This occurred despite the purification of the polyethylene glycol by passage through exchange columns. The toxic properties, which developed some time after purification, increased with time of storage of solutions of polyethylene glycol 1540 at room temperature.

Effects of low water potentials on respiration and on glucose and acetate uptake, by Chlorella pyrenoidosa.

Chlorella pyrenoidosa was subjected to a range of water potentials and the effects of these treatments on endogenous respiration and on the uptake and respiration of glucose and acetate were measured.For a given water potential the reductions were greatest for glucose, less for acetate, and least for endogenous respiration. At intermediate water potentials of about-10 atm, glucose respiration was depressed strongly at first, but this respiration approached control levels after two to three hours at low water potentials.

Effects of low water potentials on some aspects of carbohydrate metabolism in Chlorella pyrenoidosa.

Chlorella pyrenoidosa was subjected to low water potentials and the resulting changes in carbohydrate metabolism were measured.Water deficit reduced the incorporation of (14)C-glucose into methanol insoluble compounds, principally starch and increased that into sucrose. Even moderate water deficit, for example potentials of -2.