CSIR NET case studies
CSIR NET · Put your knowledge to work in context.
Joint CSIR-UGC NET is a national eligibility test administered to determine the eligibility of Indian nationals for the Junior Research Fellowship (JRF), for Assistant Professor posts, and for admission to Ph.D. programmes in Indian universities and colleges, subject to fulfilling the eligibility criteria laid down by UGC. The CSIR NET case studies are 5 cases and about 3,413 words.
1Salt effect or mechanism? Reading a Brønsted–Bjerrum plot
A student follows S2O8^2− + 2 I− → 2 SO4^2− + I2 at 25 °C by iodometry, keeping the oxidant and iodide in excess so that a second-order constant k can be extracted. To test the Brønsted–Bjerrum equation she varies ionic strength with NaClO4 and obtains: I = 0.010, 0.025, 0.050, 0.100 M giving k = 0.046, 0.057, 0.071, 0.093 M^−1 s^−1.
709 words, about 4 min2Water masses across a front: density, compensation and double diffusion
Two CTD stations are occupied 40 km apart across a frontal zone in the Southern Ocean (45°S). At 500 m, Station North reports potential temperature θ = 12.0 °C and salinity S = 35.60; Station South at the same depth reports θ = 8.0 °C and S = 35.10.
663 words, about 3 min3A kinase inhibitor with a 2.4 µM Ki - real or promiscuous?
A student screens a small molecule against a kinase with KM = 0.20 mM for ATP and Vmax = 100 U mg^−1. Initial rates are measured at [ATP] = 0.05–0.8 mM.
686 words, about 3 min4When a fixed-point iteration silently fails
A student writes one routine to solve nonlinear equations: read g(x), start at x0 = 0.5, iterate x {k+1} = g(x k), stop when x {k+1} − x k < 10^−8 or after 50 iterations, and report whichever comes first. The routine is then applied to three problems: (A) x = e^−x, (B) x = 3e^−x, and (C) x = 2e^−x.
687 words, about 3 min5A Zeeman triplet that cannot exist at 0.05 T
A student reports resolving the normal Zeeman pattern of an Fe I line at λ = 500.0 nm (atomic mass 56 u) in a 0.05 T electromagnet. The record shows three components equally spaced by 0.00010 nm, with the central component unshifted.
668 words, about 3 min