S.No Optical Microscope Electron Microscope 1. Principle Absorption Transmission or diffraction of electron 2. Source Incandescent lamp Electron gun 3. Lens Optical lens made of glass Electric and electromagnetic...
Author - Nandhini Sathish
The de-Broglie hypothesis is confirmed by the experiment conducted by G.P. Thomson in 1927. This G.P. Thomson experiment is the evidence for the electrons to behave as waves. G.P. Thomson performed experiments in which a narrow...
Scanning Electron Microscope (SEM) is an improved model of an electron microscope. SEM is used to study the three dimensional image of the specimen. Principle When the accelerated primary electron strikes the sample, it produces...
Factors affecting drug excretion are: Physicochemical Properties of Drugs: Various factors affect the physicochemical properties of drugs: i) Molecular Weight (MW): The excretion of drugs with large molecular weights is...
The heat which is flowing along the length of the bar (linearly) is called linear heat flow or rectilinear heat flow. Let us consider a long metal bar heated at one end and let us consider the flow of heat along x-axis as shown...
Solubility The solubility of the drug is important since our body contains normally 65% water. Water acts as an inert solvent, a dispersing medium for colloidal solutions and a nucleophilic reagent in numerous biological...
Ionization and pKa value Ionization is an important physiochemical property for a drug molecule. Most of the drugs are either weak acid or base and can exist in either ionized or unionized state. The ionization of the drug...
Introduction Various techniques are available for enhancing the solubility of poorly soluble drugs. Some of these approaches are as follows: Chemical Modifications: i) Use of salt forms ii) Co-crystallisation iii)...
Thermal physics is the combined study of thermodynamics, statistical mechanics and kinetic theory. Thermodynamics is the branch of physics that describes and correlates the physical properties of macroscopic systems of matter and...
Bodies in series Let us consider a compound media like a slab or a wall made up of two different materials A and B having thickness x1 and x2 as shown in (Fig. 1) Fig. (1) Bodies in series Let the temperature of two end...
