During the last decades the growth of single crystals has assumed enormous importance for both academic research and technology particularly in the field of ‘electronics’. Semiconductor devices made from single crystals are...
Author - Nandhini Sathish
A classic example of ring versus non-cyclic structure is Diethyl stilboestrol and 17β-oestradiol. The molecular design of Diethylstilboestrol was carried out by opening the B and C of steroidal nucleus of oestradiol. Due to...
a. Replacement of Fluorine atoms for Hydrogen Fluorine is most commonly employed as monovalent bioisosteric replacement for hydrogen. Stearic parameter for hydrogen and fluorine are similar, their Vander waal’s radii being...
Phase I Reaction (I) Oxidative Reactions (i) Oxidation of aromatic moieties (ii) Oxidation of Olefins (iii) Oxidation at benzylic, allylic carbon atoms and carbon atoms α to carbonyl and imines (iv) Oxidation at aliphatic and...
Isomerism arises in compounds having the same chemical formula but different orientations of the atoms belonging to the molecule in three-dimensional space is known as Stereoisomerism. The compounds that exhibit stereoisomerism...
The factors affecting the acoustics in a building are as follows. Reverberation and Reverberation time. Loudness. Focussing due to walls and ceilings. Echo. Echelon effect. Resonance. Extraneous noises. 1...
The science of “Architectural Acoustics” deals with the behaviour of sound within an enclosed space and planning of a building with a view to obtain optimum acoustic effect on the audience. In 1911, at Harward University in...
Weber – Fechner law relates Loudness (L) of the sound wave and the intensity (I) of the sound wave. According to Weber-Fechner law, the loudness of a sound wave is proportional to the logarithm of its intensity. (i.e.) ...
The absorption coefficient ‘α’ is defined as the ratio of the sound energy absorbed by the surface to the total sound energy incident on that surface. Definition (in terms of O.W.U) : The absorption coefficient of a...
Chelation/Complexation Complexes or co-ordination results from a donor-acceptor mechanism (donating accepting electron or rather an electron pair) or Lewis acid-base reaction (donating accepting protons). Since complex drug...
