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Hypothetical dihydrogen adduct structure at the active site of the Fe-only hydrogenase enzyme.

Hypothetical disjoining pressure isotherm for a foam film illustrating the primary and secondary minima. From Nguyen and Schulze . Copyright 2004, Dekker.

Hypothetical disk-filter bacterial challenge test appartus.

Hypothetical dissolution profile showing the determination of tso, t- Q, and tgg.

Hypothetical distribution curve for positively skewed population .

Hypothetical distribution of charges in a lamellar donor-acceptor system.

Hypothetical distribution of dipole moment magnitudes from a simulation of liquid water. The dashed curve is generated by connecting the tops of histogram bins whose height is dictated by the number of water molecules found to have dipole moments in the range spanned by the bin. Note that although the example is illustrated to be symmetric about a central value this need not be the case

Hypothetical distribution of exchange time constants in a protein that is approximately 70 structured. The separation between the two modes allows for the comparison between the expected and actual amount of exchange In a given region of the protein, particularly at millisecond labeling times where the contribution from backbone amides involv in secondary structure is negligible

Hypothetical distribution of highest attained ranks and total numbers of filled positions on a scientific ladder

Hypothetical distribution of internal energies of ions formed in a typical beam-type instrument. Ions with dissociation rate constants 10 s remain intact on the timescale of the mass spectrometer represents metastable ions

Hypothetical distribution of P and temperature in a temperate lake in summer. Thermal stratification restricts exchange between surface and deep waters. Phosphorus is depleted in the surface waters by the sinking of biologically produced particles.

Hypothetical distribution of solutes NaCI and HOAc between ether and water-immiscible phases.

Hypothetical dose-effect and dose toxicity curves for cytotoxic . MTD represents the maximum tolerated dose for the cytotoxic agent. Modified from Hoekstra et al.

Hypothetical dose-response cunc for a typical carcinogen

Hypothetical dose-response cune for a typical carcinogen

Hypothetical dose-response cur c for a typical carcinogen

Hypothetical dose-response curve for three genotypes

Hypothetical dose-response curves for chemically-induced carcinogenicity, showing measured dose-response curves from three studies . Note

Hypothetical dose-response curves for two chemical agents administered to a uniform population of biological specimens.

Hypothetical DR plots for a sample with only ultramicropores .

Hypothetical drug development pipeline, illustrating activities during a 12-month period. Three stages of drug development are indicated at the bottom of the figure. The corresponding milestones for each stage are indicated at the top of the figure.

Hypothetical DTA thermal curve for a semicrystalline pol3mier with the ahihty to cross-hnk. The plot shows the baseline shift that occurs at the glass transition temperature, Tg, exothermic peaks for crystallization and cross-linking

Hypothetical DTA thermal curve for a semicrystalline polymer with the ability to cross-link.

Hypothetical DTA trace for a polymer tested in air Exothermic decomposition.

Hypothetical dual-equilibrium replacement curve of eruptive species. Populations are typically within an area dominated by negative feedback, K 2 - Ki. Any increase to densities above K leads to negative growth. However, if a sudden improvement in environmental quality, or immigration, raises the population above Ki, positive feedback dominates and eruptive population growth

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