A pipette is a fundamental laboratory instrument used across biology, chemistry and clinical labs to accurately measure and transfer small volumes of liquid. In this comprehensive guide we’ll explore what a pipette is, the working principle behind air-displacement vs positive-displacement pipettes, the key components of a pipette, the many types you’ll encounter (Pasteur, graduated, volumetric, … Read more
Inoculating Loops and Needles are essential microbiology laboratory tools used for transferring, streaking, and culturing microorganisms under aseptic conditions. What is Inoculating Loops and Needles? Definition of Inoculating Loops and Needles Inoculating loops and needles are handheld tools used in microbiology laboratories to transfer and manipulate microorganisms. Inoculating loops are wire loops with a small … Read more
A colorimeter is a scientific instrument used to measure the absorbance of light by a colored solution to determine the concentration of solutes. Based on the Beer-Lambert law, the principle of colorimeter explains how light intensity changes as it passes through a solution. The instrument mainly consists of essential parts of colorimeter like a light … Read more
A hot air oven is a laboratory device that sterilizes materials using dry heat. The main parts of a hot air oven are the outer cabinet, insulation, inner chamber, heating elements, thermostat, fan, and control panel. It works on the principle of heat conduction and convection. What is Hot Air Oven? Definition of Hot Air … Read more
What is Gel Electrophoresis System? Definition of Gel Electrophoresis System Gel electrophoresis is a laboratory technique that uses a gel as a medium to separate and analyze biomacromolecules such as DNA, RNA, and proteins based on their size and charge. An electric field is applied to move the molecules through the gel, with smaller or … Read more
What is Alcohol burner? Definition of Alcohol burner An alcohol burner is a small, portable laboratory device that uses denatured alcohol as fuel to produce a controlled flame for heating, sterilization, and experimental purposes. Working Principle of Alcohol burner Factors that affect the working of an alcohol burner Parts of a Alcohol burner Operating Procedure … Read more
What is a Bunsen Burner? Definition of Bunsen Burner A Bunsen burner is a laboratory gas burner that produces a controlled flame for scientific experiments and research purposes. Principle of Bunsen burner The principle of Bunsen burner based on the combustion of gas with air before ignition, which produce a safe and controllable flame for … Read more
What is Colony Counter? Definition of Colony Counter A colony counter is a device used in microbiology laboratories to count bacterial or microorganism colonies on a solid growth medium. It simplifies and accelerates the colony counting process, providing an accurate measurement of colony forming units (CFUs) in a given sample. Purpose of colony counting Type … Read more
What is Two pan or equal arm analytical balance? Principle of Two pan or equal arm analytical balance Parts of a Two pan or equal arm analytical balance Beam – It is the main horizontal bar of the balance which carries two equal arms and supports the pans at its both ends. It made from … Read more
What is Single Pan or Unequal Arm Mechanical Balance? Parts of Single Pan/Unequal Arm Mechanical Balance Principle of Single Pan/Unequal Arm Mechanical Balance Operating Procedure of Single Pan/Unequal Arm Mechanical Balance Factors that affect readings on Single Pan/Unequal Arm Mechanical Balance 1. Air Currents– Movement of air around the balance cause pointer fluctuation, it affect … Read more
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