The effect of the berries extract of Schizundru chinensis on polo and race horses was studied. The concentration of plasmatic lactate and glucose as well as the respiratory and heart rates of these horses submitted to daerent physical effort were examined. Thirty adult horses were used for this experiment; 20 polo horses and 10 race horses. Ten polo horses were submitted to a 12 min gallop at a speed of 400 m/min, and 10 other polo horses to a 5 min gallop at a speed of 700 m/min. The race horses were submitted to a single run on a fixed distance of 800111 at maximum speed. Blood jugular samples from each polo horse (when they were in the stable) were collected for lactate and glucose analysis before the exercise and at 10 and 50 min after the exercise. Heart and respiratory rates were recorded. First each horse was given a single dose of 500 mL of saline half an hour before the race. A week later the same horses were given a single dose of 48 g of Schizundru chinemis berry extract. Treated polo horses showed a lower increase in heart rate at all moments of the exercise. They also showed a quicker recovery of respiratory frequency at the moments immediately after the race (time 0) and 5 min after the same race. The performance of the race horses was improved. In polo horses administration of Schizundru extract led to a significant reduction of the concentration of plasmatic lactate at 10, and 50min after exercise. Plasma glucose concentration in polo horses showed no significant difference between the saline treated and the Schizandru-treated animals (with the exception at 50 min after the race).
Proceedings.]DISCUSSION ON IXPOUXDIXG RESERT-OIRS. CORRESPONDENCE ON IMPOUNDING RESERVOIRS. [Minutes ofDr. -4. VOR analysis of the problem had convinced Delocre that, in consequence liraunmiihl. of the varying relation of the pressures, continuous profiles, such, for instance, as logarithmic curves, were not possible; he therefore divided the cross-section into three portions. Professor Kreuter remarked truly that, in order for the line of pressure to change from its fixed position in portion No. l to its position in portion No. 2 of Delocre's section, an intermediate part should be introduced. This part was of trapezoidal form. The equation for the breadth in the third portion was given as an algebraic expression, that in the fourth (base) portion being determined by a logarithmic curve. The principal difficulty consisted, after the breadth in the entire cross-section of the dam were found, in SO joining together the four portions as to ensure the fulfilment of the necessary conditions of equilibrium. This was an easy matter in the first and second portions, but in the last two the equation contained an integral that could only be evaluated step by step. The effect of the vertical component of the waterpressure on the profiles, hitherto neglected, was next considered by a combined graphical and analytical method.Engineers might, perhaps, consider this theoretical treatment of the question too cumbrous for ordinary use. Two replies might be given to this : first, the work involved in the computation was less laborious than it might at first sight appear to be; and, secondly, the time spent in arriving at a solution of the question was of little importance in relation to the certainty introduced into the design of dams by rigorous mathematical treatment. nrr. A. Fairlie Mr. A. FAIRLIE BRUCE observed that the strength of the Tansa Rruce.dam might have been increased had it been constructed with an inner skin of 5 to 1 Portland cement concrete, say 5 feet thick at the bottom, diminishing to 1 foot at the top. That would not have added much to the cost, and would have prevented water from finding its way into the heart of the structure, which, while it might cause little or no leakage, must, by its pressure, impair the stability of the dam. It would have been interesting to know why rubble masonry was preferred to rubble concrete for the work. The crushing strength of the mortar compared unfavourably with that of Portland cement mortar. With cement concrete two weeks old, in which the mortar was composed of 1 part of cement to 3 parts of sand, he had, in arched ribs, obtained nearly as good results as those quoted in the Paper at six to eleven months ; and at twelve weeks he had obtained 2,447 lbs, per square inch, which exceeded the maximum Tansa test. Judging from the quantity ofwater delivered, and the small loss by leakage, the workmanDownloaded by [ UNIV OF TEXAS AT AUSTIN] on [11/09/16].
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