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

Big City, Little Prairies

submitted by: partspermillion
Are you a member of the ESA Student Section? To vote for this film (film #3) as Student's Choice in the 2008 Student Ecofilm Awards ( http://www.esa.org/students/section/?q=node/51 ) please send your email vote as formatted below: To: salguero@sas.upenn.edu Subject: ESA Student Section SEAs Choice Award vote Body: Vote #3 If you are not yet a member of the student section, you can join easily! Click on the following link and follow the instructions (...

Tumour cords' growth in a vascular network

submitted by: sast
Evolutions of oxygen concentration and formation of hypoxic zones during tumour growth in the vascular network . This simulation was produced with an experimental modification to the model, where vessels are oxygen sources inside the simulation domain, cells do not switch to anaerobic metabolism in this simulation. For more information refer to http://code.google.com/p/cord/ .

The Past, Present and Future of the Protein Data Bank

submitted by: WomenInBioinformatics

Dr. Helen M. Berman, Director of the Protein Database (PDB), Rutgers University.

Dr. Berman is internationally renowned for her development of protein and nucleic acid databases. Her research interest is in the application of Bioinformatics to protein structure.

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 .

Disease Detectors - Partners Video Magazine

submitted by: csrees

Scientists have developed nanoscale biosensors that can help detect diseases on farms and in hospitals. Disease Detectors 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