Deoxyribonucleic acid (DNA) is the genetic material found in the chromosomes of all animals and plants. It is made up of only four types of organic nitrogenous bases: adenine (A), guanine (G), thymine (T) and cytosine (C). Of these, A and G are the purines and T and C are the pyrimidines. Chargaff gave the base pairing rule or the …

This is an inflammation of the membranes of the nose and throat with a thick mucous discharge. Catarrh sometimes accompanies a heavy cold, or may occur without a cold, and sometimes may be of nervous origin.

Carnival glass is pressed glass, meaning that hot molten glass which may or may not contain colour of its own is poured into metal moulds and conforms to their shape. While the glass is still hot, various solutions of metallic salts are sprayed onto the surface and the piece is reheated. The result is a piece of iridescent glassware with …

It is a method to determine the age of plants and fossils. Carbon has three naturally occurring isotopes, C12, C13 and C14. Of the three, C14 is radioactive in nature and has a half-life (decays to half the strength) of 5,730 years. Scientists measure the strength of C14 in the plant or fossil, and compare it with the expected strength …

When a satellite, natural or artificial, is orbiting its parent planet (or primary) under some conditions, the satellite revolves around itself (or spins) quite fast relative to its period of rotation around the primary, and under some other conditions, both the periods coincide. The latter phenomenon leads to the satellite facing the primary always with the same side and it …

The activity of measuring the concentration of carbon dioxide (CO 2 ) in respiratory gases during the respiratory cycle of a patient is called capnography. The equipment used in capnography usually plots the partial pressure of CO 2 in the exhaled breath as a wave form, with time on the x-axis and pressure of carbon dioxide on the y-axis. Infrared …

For spontaneous symmetry breaking to occur, there must be a system in which there are several equally likely outcomes. The system as a whole is therefore symmetric with respect to these outcomes (if we consider any two outcomes, the probability is the same). However, if the system is sampled (i.e. if the system is actually used or interacted with in …

Each human kidney contains about 1 million filtering units called nephrons. The nephron has a renal tubule and dilated blind end like a funnel. This dilated funnel like part is called Bowman’s Capsule. It has a tuft of capillaries. The fluid which comes out of these capillaries is filtered by Bowman’s Capsule. The renal tubules do further processing to make …

Saras Mela, the fair that promotes handloom and handicraft products. Organised by the ministry of rural development, government of India, and the department of panchayat and rural development of the state government.

In aerodynamics, bow shock is a normal shock that occurs in front of an object within a supersonic flow. Unlike an oblique shock, the bow shock is not attached to the tip of the object in the flow. Oblique shock angles are limited in formation based on the corner angle and upstream Mach number. When these limitations are exceeded, a …