Chloromycetin, also known as chloramphenicol, is a broad-spectrum antibiotic originally derived from the bacterium Streptomyces venezuelae. It holds the distinction of being the first antibiotic synthesized artificially and is effective against a diverse array of bacteria.
Mode of Action: Chloramphenicol works by binding to the 50S ribosomal subunit in bacteria, blocking peptide bond formation and thus inhibiting protein synthesis.
Uses: This antibiotic is utilized to combat severe bacterial infections such as typhoid fever, meningitis, and ocular infections.
Side Effects: Despite its effectiveness, the use of chloramphenicol is restricted due to severe side effects, including bone marrow suppression and aplastic anemia.
Match the antibiotics in Group I with the microorganisms that produce them in Group II.
Derive an expression for energy stored in a charged capacitor. A spherical metal ball of radius 15 cm carries a charge of 2μC. Calculate the electric field at a distance of 20 cm from the center of the sphere.
Draw a neat labelled diagram of Ferry's perfectly black body. Compare the rms speed of hydrogen molecules at 227°C with rms speed of oxygen molecules at 127°C. Given that molecular masses of hydrogen and oxygen are 2 and 32, respectively.
Distinguish between an ammeter and a voltmeter. (Two points each).
The displacement of a particle performing simple harmonic motion is \( \frac{1}{3} \) of its amplitude. What fraction of total energy is its kinetic energy?
Using the geometry of the double slit experiment, derive the expression for the fringe width of interference bands.
An alternating voltage is given by \( e = 8 \sin(628.4 t) \).
Find:
(i) Peak value of e.m.f.
(ii) Frequency of e.m.f.
(iii) Instantaneous value of e.m.f. at time \( t = 10 \, {ms} \)