In the demonstration, students observe a visual convection current in the classroom and compare it to the images of convection cells in the Sun taken from the Michelson Doppler Imager (MDI) instrument on the Solar and Heliospheric Observatory (SOHO) spacecraft. Students also hear or read background information about convection cells on Earth and in the Sun and view a labeled cutaway diagram of the Sun.
The issue-focused, peer-reviewed article explains how stem cells have the potential to cure many human diseases because they are: like blank cells – they can become any cell in the human body, enduring – embryos, in particular, can provide an endless supply of stem cells, and regenerative – they can be used as a live source of self-repair.
Mitochondria are dynamic organelles, essential for cell life and death. The morphology of this organelle is determined by fusion and fission, controlled by a growing set of “mitochondria-shaping” proteins, which influence crucial signalling cascades, including apoptosis.
This Caltech press release covers the development of solar cells that can absorb light and convert its energy efficiently thanks to a silicon wire design. The new cells, in addition to being extremely efficient, are also flexible in form, making them useful for consumer installation after further research.
Chronic inflammation-induced carcinogenesis is a commonly accepted entity and is frequently seen within the gastrointestinal tract, although the underlying mechanisms remain unclear. Alterations in specific oncogenes and tumor suppressor genes are known to be responsible for malignant transformation. Nevertheless, the inflammatory microenvironment classically affects tumor promotion in its role as an altered stem cell niche and can also affect tumor initiation and tumor progression.
In 1964, Berry, then an assistant professor at the University of Chicago, published a paper in the Annals of the Association of American Geographers calling for a new approach to the accumulation of spatial data. To reconcile regional and systematic analysis, he proposed the creation of a matrix of spatial information. This matrix would be comprised of rows of data that dealt with a particular measurable variable, and columns that consisted of data pertaining to a uniform location.