Sourav Pan is the founder and sole author of Biology Notes Online. He holds a Bachelor of Science (B.Sc.) degree and an M.Sc. in Microbiology from the University of Calcutta. He creates educational resources covering microbiology, immunology, biotechnology, genetics, cell biology, botany, zoology, and other life-science subjects.
His goal is to make complex biological concepts easier to understand through well-structured, student-friendly articles based on academic textbooks, peer-reviewed research, and authoritative scientific sources. In addition to writing new content, he regularly reviews and updates articles to improve their accuracy, clarity, and educational value.
Ultrasonic Homogenizer is a scientific device used to disrupt, mix and homogenize liquid materials. It is also called sonicator or ultrasonic processor. It is used to make uniform dispersion and emulsion in liquid sample. It mainly consists of three parts, such as generator, piezoelectric transducer and metal probe. The metal probe is also called horn … Read more
Homogenizer is a mechanical device used to make a uniform and stable mixture of two substances which normally do not mix well. It is used in food, dairy, pharmaceutical and cosmetic industries. It forces a liquid or semi-fluid product through a narrow gap called homogenizing valve under very high pressure. In this process, the liquid … Read more
Fluorescence spectrometry is an analytical technique that is used to measure the light emitted by a substance after absorption of electromagnetic radiation. It is also known as fluorimetry. It is a very sensitive method for detecting small amount of substance. In this method, the sample is first exposed with a particular wavelength of high energy … Read more
Rotor Stator Homogenizer is a mechanical homogenizer used for mixing, emulsification and particle size reduction. It consists of two main parts, the rotor and the stator. The rotor is the rotating part and the stator is the fixed outer part. The rotor rotates at high speed inside the stator. Due to this rotation, the liquid … Read more
Bead Mill Homogenizer (Bead Homogenizer) is a laboratory device that is used to rapidly break and mix biological or industrial samples into a uniform mixture. It works by placing the sample in a closed tube with small grinding beads. These beads may be made up of glass, ceramic, or stainless steel. During the process, the … Read more
Beaker is a cylindrical laboratory container with flat bottom and small spout at the top. It is one of the common glassware used in laboratory for mixing, heating, stirring and keeping liquids for short time. The spout is used to pour the liquid easily and in controlled way. It is usually made up of borosilicate … Read more
Blood Collection Tubes are evacuated, sterile and single-use medical devices that are used to collect human blood samples for laboratory testing. These tubes are used by trained healthcare professionals during blood collection. It helps to collect, contain, preserve and transport the blood sample safely. The tubes are generally made up of glass or shatter-resistant plastic … Read more
Centrifugal Separators are mechanical devices that are used to separate the components of a mixture on the basis of their different densities. It is generally operated by an electric motor and rotates a bowl or chamber at very high speed. During this rotation, a strong centrifugal force is produced which acts like artificial gravity. The … Read more
Decanter centrifuge is an industrial machine which is used to separate solid materials from liquids present in a slurry. It is also known as horizontal bowl centrifuge, solid bowl centrifuge, or scroll centrifuge. It works by spinning at very high speed. In this process, a strong centrifugal force is produced which increases the natural gravitational … Read more
Water Distiller is a device which is used for purification of water by distillation process. It gives clean water by heating the water and then cooling the steam. It is based on evaporation and condensation of water. In water distiller, the raw water is taken in a boiling chamber. The water is heated until it … Read more