Elevated arterial pressure in normotensive Wistar strain rats after the transplantation of embryos from hypertensive ISIAH strain rats. Inherited stress-induced arterial hypertension

The ISIAH embryos exerted no effect on surrogate mothers if the embryos had been cryopreserved before transferring. The data obtained is discussed from the standpoint of surrogateship in medicine and possible effect of the embryo cryobanking on some inherited traits in mammals.     

Influence of the aluminum oxide content of chamotte gunite masses on their slag resistance

Conclusions The authors investigate the influence of the aluminum oxide content of chamotte gunite masses on their slag resistance in contact with converter and synthetic slags. The refractory undergoes wear by dissolution of its surface in the fused slag; the slag does not penetrate very deeply into the refractory.A significant increase in slag resistance is observed only when the aluminum oxide content of the slag is 40% or more. An increase in the aluminum oxide content from 34–35 to 37–39% is not accompanied by a marked increase in the slag resistance. Linear regression equations with high correlation coefficients (0.70–0.98 in absolute value) have been constructed for different aluminum oxide content ranges.A more significant decrease in slag corrosion can be attained by introducing special additives into the chamotte mass composition.Translated from Ogneupory, No. 6, pp. 30–32, June, 1980.