A comparison of the results from shock temperature measurements on Fe. Hatchured area for Fe melting is defined by the results of Bass et al. predict that the shock temperatures of solid stainless steel are lower than for pure, solid iron, as observed.
A computer facility performs dynamic simulation and analysis of reciprocating compressor installations such as this two-cylinder compressor. Interactive pulsation and mechanical analysis ensures trouble-free operation. Used by permission
A concerted mechanism for GTP hydrolysis by Ga in which transfer of a proton to the y phosphate is coupled to deprotonation of the attacking water by Gin 200. Adapted from J. Sondek et al., Nature 372
A conservative-logic realization of a conventional serisJ adder circuit it is built entirely of Fredkin gates. Places along the wires marked with a dot represent unit time delays at those locations. Illustration patterns after and
A correlation chart for the observed predicted ripple characteristics for the reptation, Rouse and polymer mode coupling models. The restation model gives the best correlation between theory and experiment.
A cross-section of a nearly square cellulose microfibril, with the individual molecular chains shown as rectangles. Also shown are the one- and two-chain unit cells of la and ip. This view of the microfibril is parallel to the long axis. The chains are arranged so that the edges of the crystal correspond
A crystal is built up from many billions of small identical units, or unit cells. These unit cells are packed against each other in three dimensions much as identical boxes are packed and stored in a warehouse. The unit cell may contain one or more than one molecule. Although the number of molecules per unit cell is always the same for all the unit cells of a single crystal, it may vary between different crystal forms of the same protein. The diagram shows in two dimensions several identical unit cells, each containing two objects packed against each other. The two objects within each unit cell are related by twofold symmetry to illustrate that each unit cell in a protein cr stal can contain several molecules that are related by symmetry to each other.
A cut across the ground state . Keeping the phase of the electronic wave function constant, this coordinate leads from the ground to the excited state. At a certain point, the two surfaces must touch. At the crossing point, the wave function is degenerate.
A de novo designed P sheet protein, betabellin, formed by the dimerization of two identical four-stranded -sheets and a disulfide linking the two sheets. This model is for betabeUins 9 and later progenies the earher betabeUins contained a two-armed cross-linker connecting the sheets .
A diagram of the active site of chymotrypsin with a bound inhibitor, Ac-Pro-Ala-Pro-Tyr-COOH. The diagram illustrates how this inhibitor binds in relation to the catalytic triad, the strbstrate specificity pocket, the oxyanion hole and the nonspecific substrate binding region. The Inhibitor is ted. Hydrogen bonds between Inhibitor and enzyme are striped. Adapted from M.N.G. James et al., . Mol. Biol. 144