H\u3csup\u3e+\u3c/sup\u3e- and Na\u3csup\u3e+\u3c/sup\u3e- elicited rapid changes of the microtubule cytoskeleton in the biflagellated green alga \u3cem\u3eChlamydomonas\u3c/em\u3e

Although microtubules are known for dynamic instability, the dynamicity is considered to be tightly controlled to support a variety of cellular processes. Yet diverse evidence suggests that this is not applicable to Chlamydomonas, a biflagellate fresh water green alga, but intense autofluorescence from photosynthesis pigments has hindered the investigation. By expressing a bright fluorescent reporter protein at the endogenous level, we demonstrate in real time discreet sweeping changes in algal microtubules elicited by rises of intracellular H+ and Na+. These results from this model organism with characteristics of animal and plant cells provide novel explanations regarding how pH may drive cellular processes; how plants may respond to, and perhaps sense stresses; and how organisms with a similar sensitive cytoskeleton may be susceptible to environmental changes

Workshop on Lunar Breccias and Soils and Their Meteoritic analogs

Lunar soils and breccia studies are used in studying the evolution of meteorite parent bodies. These studies are compared to lunar soils and breccias

Space programs summary no. 37-45, volume IV FOR the period April 1, 1967 to May 31, 1967. Supporting research and advanced development

Space exploration projects on systems, guidance and control, environmental simulation, space sciences, propulsion, telecommunications, and engineering mechanic

Washington University Record, August 28, 1980

https://digitalcommons.wustl.edu/record/1173/thumbnail.jp

The study of debris disks with SPICA

Debris disks are evidence that stars harbor reservoirs of dust-producing plantesimals on spatial scales similar the solar system. Debris disks present a wide range of sizes and structural features and there is growing evidence that, in some cases, they might be the result of the dynamical perturbations of a massive planet. Our solar system also harbors a debris disk and some of its properties resemble those of extra-solar debris disks. This contribution discusses how the study of debris disks with SPICA can shed light on the diversity of planetary systems, the link between debris disks and planets and the link between extra-solar planetary systems and our own.Comment: 6 pages, 6 figures, Proc. Workshop "The Space Infrared Telescope for Cosmology and Astrophysics: Revealing the Origins of Planets and Galaxies

1937, March 5, Friday

The Booster, Vol. XV, no. 11. Printed in Pittsburg, Kansas

1935, March 1, Friday

The Booster, Vol. XV, no. 11. Printed in Pittsburg, Kansas