This is part of its efforts to popularize science to the General Public and Students who are pursuing science as their career. TNSF attempt to focus on students on higher science as everyone knows
that learning of science at college within the curriculum is not enough to acquire holistic knowledge of science at the appropriate time. Hence, to fill the gap between what students are acquiring through the curriculum and what
it is required, TNSF is planning its activities on higher science to students who are pursuing higher education
Functional magnetic resonance imaging, or FMRI, works by detecting the changes in blood oxygenation and flow that occur in response to neural activity – when a brain area is more active it consumes more oxygen
and to meet this increased demand blood flow increases to the active area. FMRI can be used to produce activation maps showing which parts of the brain are involved in a particular mental process.
How does MRI work?
FMRI is a special type of magnetic scan. The cylindrical tube of an MRI scanner houses a very powerful electro-magnet. A typical research scanner (such as the FMRIB Centre scanner) has a field strength
of 3 teslas (T), about 50,000 times greater than the Earth’s field. The magnetic field inside the scanner affects the magnetic nuclei of atoms. Normally atomic nuclei are randomly oriented but under the influence of a magnetic
field the nuclei become aligned with the direction of the field. The stronger the field the greater the degree of alignment. When pointing in the same direction, the tiny magnetic signals from individual nuclei add up coherently
resulting in a signal that is large enough to measure. In FMRI it is the magnetic signal from hydrogen nuclei in water (H2O) that is detected. The key to MRI is that the signal from hydrogen nuclei varies in strength depending
on the surroundings. This provides a means of discriminating between grey matter, white matter and cerebral spinal fluid in structural images of the brain.
Dr. Raghuram Chetty
Professor, Department of Chemical Engineering, Indian Institute of Technology - Madras
Fundamentals and applications of lithium-ion batteries
Dr. Muali Murugavel
Assistant Professor, Department of Chemical Engineering, Indian Institute of Technology - Madras
What next in batteries for electric vehicles - A look into the Indian context!
Question & Answer
Dr. Raghuram Chetty is a Professor at the Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai. His area of interest are Electrocatalysis, Fuel cells, Carbon nanotubes. He has his post doctoral assignments with Laboratory of Industrial Chemistry, Ruhr University Bochum, Germany[2007-08] and Chemical Engineering and Advanced Materials, Newcastle University, United Kingdom[2005-07]. He is part of IIT-M since 2009.
Aravind Kumar Chandiran Ph.D, is Assistant Professor at Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai. His are of interest are Solar cells, Solar water splitting, Carbon dioxide reduction, Photoconductivity and Oxide semiconductors. His doctoral degree is from Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland[2010-2013]. He was affliate postdoc in Molecular Foundry, Lawrence Berkeley National Laboratory, USA. His Postdoc was with Long Group, Department of Chemistry University of California, Berkeley, USA.