Methylphenidate Decreased the Amount of Glucose Needed by the Brain to Perform a Cognitive Task

submitted by: noravolkow
The use of stimulants (methylphenidate and amphetamine) as cognitive enhancers by the general public is increasing and is controversial. It is still unclear how they work or why they improve performance in some individuals but impair it in others. To test the hypothesis that stimulants enhance signal to noise ratio of neuronal activity and thereby reduce cerebral activity by increasing efficiency, we measured the effects of methylphenidate on brain glucose utilization in healthy adults. We...
Authors: Nora d. Volkow, Joanna s. Fowler, Gene-jack Wang, Frank Telang, Jean Logan, Christopher Wong, Jim Ma, Kith Pradhan, Helene Benveniste, James m. Swanson

ATP deficit in oxygen-limited tumour cord growth (FF++)

submitted by: sast
This is a simulation of tumour cord growth , where cells suffer from hypoxia (energy deficit shown with colour). The tumour grows along the blood vessel (coincides with x -axis). Red line shows the position of the tumour–host interface. This particular simulation was programmed in FreeFEM++ out of curiousity. The source code for simulation may be found at http://code.google.com/p/cord . This video reflects work in progress and may be different from the final results .

Spiranthes praecox Rich.

submitted by: Timothy M. Jones
Spiranthes praecox, greenvein lady's tresses, is an orchid native to eastern North America, from eastern Texas to New Jersey. Though many members of the genus are difficult to identify, this species is readily distinguished by the green veins on the lip of the flower. A yellow veined form is also known (C.J. Sheviak and P.M. Brown. In: Flora of North America. Vol 26, 2002). Plant 15-80 cm tall; with mostly linear leaves (1 - 5 mm wide) often hidden in leaf litter; inflorescence...

open genius: strumento per una scienza libera

submitted by: atnp lab

In this presentation, Andrea Gaggioli describes crowd-funding as a possible strategy to cope with the lack of investments in research, as well as to increase democratization in the sciences. Projects seeking funding could be stored in an online repository. Each project would include a description of its objectives, duration, and requested contribution. Investors (either people or funding agencies) could decide which projects to fund.

Following the Flow - Partners Video Magazine

submitted by: csrees

Researchers are discovering how nano-scale tracers can uncover the sources of pollution in America's farm fields and waters. Following the Flow is a segment from Partners Video Magazine's latest episode, The Science of Small. To view the entire episode visit: http://www.csrees.usda.gov/newsroom/partners/partners.html

A Second Life for E-Health

submitted by: atnp lab

A new project of the Applied Technology for Nuero Psychology Lab of Prof. Giuseppe Riva and Researcher Alessandra Gorini: use the platform Second Life for on line psycological support for groups and individuals