Adrenergic antagonists, also known as adrenergic blockers or adrenergic receptor antagonists, are a class of drugs that interfere with the actions of the sympathetic nervous system, specifically by blocking the effects of neurotransmitters like norepinephrine and epinephrine (adrenaline) at adrenergic receptors. These receptors are found throughout the body and are crucial in regulating various physiological…
Filtration is the process wherein a filter medium separates a heterogeneous mixture of fluid and solid particles. The filter medium allows the passage of fluid but retains the solid particles. The process retains oversized solids in the fluid, but it does not complete the separation, as the filtrate may contaminate with solid particles smaller in…
A triple roller mill is used to mix semisolids while preparing ointments, creams, pill masses, wet mass for making granules, etc. Principle The material experiences a high shear developed by the differential speed and the narrow space between the rollers. Under the influence of this shear, aggregates, and particles get crushed, and the drug gets…
Silverson emulsifiers mix or homogenize coarse particles in the emulsion and suspension, reducing them to fine particles. Its capacity ranges from 1 ml to 12 lt, and its ability to mix in-line with flow rates is up to 20 lt/min. Principle Silverson emulsifier works on the principle of shearing forces and turbulence produced by the…
Turbines are mechanical devices that mix different fluids with blades and impellers. Turbines are used for mixing high viscosity liquids because of the greater shear forces produced by them than the propellers. They are used especially for the preparation of emulsion. For preventing vortex formation, baffles are often used. Construction ¨ Turbines consist of a…
A Double cone blender is a competent and versatile machine used for uniform blending of granules and dry powders. It is made up of stainless steel. It is available in various working capacities ranging from 5 – 500 liters. Principle A double-cone blender produces a homogeneous solid-solid mixture. This equipment involves axial mixing as the…
Mixing is among the most important unit operation processes in many industries. It involves the mixing of solids, liquids, or gases having two or more than two components. Mixing is the process where two or more ingredients are treated so that every particle of any one ingredient lies as near as possible to the particle…
Benzoic acid is a carboxylic acid derived from benzene, and it plays a significant role in organic chemistry. Its aromatic ring imparts unique reactivity, and various reactions highlight its versatile nature. Here’s a note on some important reactions of benzoic acid: 1. Aromatic Electrophilic Substitution Reaction: Benzoic acid can undergo electrophilic aromatic substitution reactions. Example:…
The acidity of a compound refers to its ability to donate a proton (H⁺ ion). Substituents on a molecule can significantly influence its acidity, and understanding these effects is crucial in organic chemistry. Here’s a detailed note on the effect of substituents on acidity: 1. Inductive Effect Definition: The inductive effect involves the transmission of…
Aromatic acids, also known as aromatic carboxylic acids, are organic compounds that contain both a carboxyl group (-COOH) and an aromatic ring. The aromatic ring’s unique electronic and structural features influence aromatic acid’s acidity. Understanding the acidity of aromatic acids is crucial in predicting their reactivity and behavior in various chemical reactions. Here’s a note…