Experiment rebound test

REBOUND A condition many athletes experience after they discontinue a steroid cycle. During this rebound state the athlete often incurs his best strength and size gains. This may be due to an over production of testosterone by the testes upon the cessation of exogenous steroid use. HCG administration further enhances this effect. 

When the native-pA/pB polypeptide is rebound to the Photosystem I core protein, frozen in darkness, and illuminated at 16 K, Fa is 85% photoreduced (g values of 2.05, 1.94 and 1.86), and Fb is about 15% photoreduced (g values of 2.07, 1.92 and 1.89). Note that this differs significantly from the earlier reported rebinding of the spinach Fa/Fb protein to the Synechococcus Photosystem I core protein [9], where 50% of Fa and 50% of Fb were photoreduced. When the Fa/Fb apoprotein is reconstituted with inorganic iron and sulfide in the presence of 6-mercaptoethanol and rebound to the Photosystem I core protein, the photoreduction of Fa and Fb occur in the same amounts as the control (data not shown). Clearly, the differences in the amount of Fa and Fb photoreduced in these two experiments are not a function of the cross-species reconstitution, but instead, may be related to a time-dependent reorientation of the Fa/Fb polypeptide on the Photosystem I core protein. Experiments are now in progress to test this proposal. 

The influence of steel fibres on the behaviour of high performance concrete slabs subjected to high velocity impact of projectiles was tested for construction of shields in military applications. The reinforced concrete slabs exhibited smash failnre, while the slabs reinforced with high volumes of fibres (7% and 10% volnme, pre-placed in the moulds) remained only with minor radial cracks on both sides. The projectiles were either embedded in or rebound from the targets. Several experiments were performed on slabs and plates subjected to perforation by projectiles or falling weights by Luo et al. 

Figure 5 Various forms of the adhesion experiment suitable for studying elastomers in contact with rigid substrates (a) peel test (b) and (c) growth of a crack in tension (d) blister test (e) rolling (f) the tackometer (g) rebound (h) Schallamach waves and (i) propagation of a macro dislocation in ironing. The rigid substrate is shaded (adapted from ref. 59)...

---