Value of biochemical profiling in a periodic health examination program: analysis of 1,000 cases

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Cell volume determinations of Dictyostelium discoideum

The intercellular water present in pellets of centrifuged cell suspensions of the slime mold Dictyostelium discoideum was measured at four stages of differentiation.

Inhibition by actinomycin D of uridine diphosphoglucose synthetase activity during differentiation of Dictyostelium discoideum

Actinomycin D inhibits the increase in specific activity of uridine diphosphoglucose synthetase during differentiation of the cellular slime mold, Dictyostelium discoideum. The degree to which this inhibition occurs is strictly correlated with, and may result from, the general inhibition of morphogenesis by actinomycin D.

Effect of Blending on Molecular Weight Distribution of Polymers

The effect of blending polymers of different molecular weight on the Q value (Q=Mw/Mn) of the blend has been considered. A mathematical expression is derived, and it shows by a simple application to monodisperse systems that blending over a wide molecular weight range is necessary to give high Q values. These principles are then applied to the ease of Ziegler and Phillips type high density polyethylenes having wide log-normal molecular weight distributions. In this way it is shown that only blending over a very wide melt index range, e.g., 1000/1, can be expected to have a measurable effect on Q. A series of physical measurements on blended and homogenized Ziegler polyethylenes shows no significant differences between blends and directly produced polymers.