Mitotic apparatuses (MA) isolated from metaphase sea urchin eggs in 12% hexylene glycol at pH 6.4 can be dissolved rapidly in 0.6 M KCl, and more than one-half of the total protein of the MA is soluble under these conditions. In the phase-contrast microscope, the fibrous structure of the MA can be seen to disintegrate in KCl solution, leaving only granular material which, in the electron micros...

All ultrafiltration devices have in common a semipermeable membrane and a means for creating a pressure difference across it. They differ only in the configuration of the membrane, the nature of the force used to create a pressure difference, and the ease with which the environment of the plasma can be controlled so as to simulate physiological conditions. Speed of producing ultrafiltrate provi...

In this paper I present a robotic device that offers new ways of interaction for producing rhythmic patterns. The apparatus is placed on an overhead projector and a visual presentation of these rhythmic patterns is delivered as a shadow play. The rhythmic patterns can be manipulated by modifying the environment of the robot, through direct physical interaction with the robot, by rewiring the in...

The ≃ 250 kg highly radiopure NaI(Tl) DAMA/LIBRA apparatus, running at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N., is described.

The major 22S protein of the hexylene glycol-isolated mitotic apparatus has been characterized from spindle isolates and extracts of whole eggs and acetone powders of eggs from the sea urchins Strongylocentrotus purpuratus, Strongylocentrotus droebachiensis, and Arbacia punctulata. The protein is free of nucleotide, lipid, and ATPase activity. Essentially identical in amino acid composition, pr...

determination of volume change of unsaturated soils during loading and suction change is one of the most important difficulties in testing unsaturated specimens. it is revealed from literature review that various attempts have been made to invent an apparatus that can be used in testing on unsaturated soil specimens, simply and accurately. in this research, details of design and manufacture of ...