In this article we will learn about the contribution of Robert Koch in Microbiology and Koch’s Postulates. All this informations are only for students. Robert Koch Contribution of Robert Koch 1. Isolating pure bacterial cultures: Robert Koch utilized Agar for isolation and cultivation of bacterial pure culture. There were several benefits of this agar medium, … Read more
Louis Pasteur Louis Pasteur was a French scientist who made significant contributions to the fields of microbiology and chemistry. He is best known for his work on the germ theory of disease, which states that many diseases are caused by microorganisms, and for his development of pasteurization, a process that involves heating liquids to kill … Read more
Antonie van Leeuwenhoek (24 October 1632 – 26 August 1723) The full name of Antonie van Leeuwenhoek is Antonie Philips van Leeuwenhoek. Antonie van Leeuwenhoek was a moderately educated owner of a textile business and a scientist. He was born on October 24, 1632, in the small city of Delft in the Dutch Republic. Leeuwenhoek … Read more
What is Spontaneous Generation Theory? Definition of Spontaneous Generation Spontaneous generation is the historical theory that living organisms can arise directly from nonliving matter. Spontaneous Generation Theory The spontaneous generation theory, as delineated by Aristotle in his seminal work “On the Generation of Animals” circa 350 B.C., offers a scientific proposition to elucidate the seemingly … Read more
In my previous notes, I have already discussed Transmission Electron Microscope and Scanning Electron Microscope, their working principle, parts, definition, application, advantages, disadvantages, and light path. You can check them out. 20 Difference Between Transmission and Scanning Electron Microscope Topic Transmission Electron Microscope Scanning Electron Microscope 3D/2D Image 2D projection image of the inner structure … Read more
In My previous notes i have already discussed about Brightfield Microscope and Fluorescence Microscope, their working principle, parts, definition, application, advantages, disadvantages and light path. You can check them out. Difference Between Brightfield Microscope and Fluorescence Microscope. Topic Brightfield Microscope Fluorescence Microscope Invented by Antonie van Leeuwenhoek (1632–1724) Antonie van Leeuwenhoek (1632–1724) Fluorochromes Not required … Read more
14 Difference Between Brightfield and Phase-contrast Microscope Topic Brightfield Microscope Phase Contrast Microscope Invented by Antonie van Leeuwenhoek (1632–1724) Frits Zernike (1888-1966) in 1932 Staining The Specimen Must be Stained before their observation under bright field Microscope. Staining is not required. Changes in refractive index This Microscope has no ability to alter the refractive index. … Read more
In this article we will learn 12 important difference between Darkfield and bright Field Microscope. Definition of Bright Field Microscope The Bright Field Microscope is a conventional Microscope, in this microscope, the specimen appears as dark against a bright background. Definition of Dark Field Microscope The darkfield microscope is a conventional microscope, in this microscope, … Read more
What is Oil Immersion? Oil immersion is a technique, used to increase the resolving power or microscopic resolution of a light microscope. This is done by immersing the objective lens and specimen into a transparent oil containing a high refractive index, as a result, it increases the numerical aperture of the objective lens. The immersion … Read more
Stereo microscopes, in contrast to compound light microscopes, often employ reflected illumination, or light reflected off an object’s surface, rather than transmitted (diascopic) illumination. When a specimen is too thick or opaque for compound microscopy, reflected light from the object enables for investigation. Unlike a compound microscope, transmitted illumination in most stereo microscopes is not … Read more
Confocal microscopy has various advantages over conventional optical microscopy, including a short depth of field, the elimination of out-of-focus glare, and the ability to collect optical slices serially from thick specimens. A prominent use of confocal microscopy in the biomedical sciences is the imaging of either fixed or live cells and tissues that have typically … Read more
What is phase contrast microscopy? A phase contrast microscopy converts slight differences in refractive index and cell density into easily detected variation in light intensity to observe living cells. This microscope is used for visualization of cell culture and live cells. Living cells can be observed without any staining. Unstained specimens have absorbed no light, … Read more
A scanning electron microscope (SEM) is a type of electron microscope that generates images by scanning the surface of a specimen with a concentrated beam of electrons. Electrons interact with atoms in the sample, generating signals that carry information about the sample’s surface topography and composition. The electron beam is scanned in a raster scan … Read more
What is transmission electron microscope? Parts of A Transmission Electron Microscope 1. Electron Gun Types of Electron Gun Used in Transmission Electron Microscope There are several types of electron guns that are used in transmission electron microscopes (TEMs), including: Overall, the type of electron gun used in a TEM depends on the specific requirements and … Read more
An electron microscope is a type of microscope that uses a beam of electrons to create an image of a sample. Electron microscopes have a higher resolution than optical microscopes, which use light to form an image, and can be used to observe objects that are too small to be seen with an optical microscope. … Read more
A microscope is a scientific instrument that is used to magnify the image of an object or sample in order to study its structure or features in detail. Microscopes are commonly used in scientific and medical research, as well as in education and other applications, to study small structures and organisms that are not visible … Read more
The history of the simple microscope can be traced back to the 17th century, when it was first developed by Dutch mathematician and astronomer, Christiaan Huygens. Huygens designed a simple microscope that used a single converging lens to magnify the image of an object, similar to the design of a modern refracting simple microscope. The … Read more
In this article we will learn about Agglutination test definition, Types, Uses, Advantages, Disadvantages, Aim of Agglutination Test, Specimen collection, application of Agglutination test and finally Examples of Agglutination test. Agglutination Test Agglutination Test is a clinical assay used for the detection of Antibody or Antigen in body fluids such as saliva, urine, cerebrospinal fluid, … Read more
Hey, if you’re a student of microbiology then you’re familiar with the term Microsporum spp. but if you’re from another field I don’t think you’re familiar with the term. If you are familiar then let me know in the comment section. Now, let me explain you in a brief; Advertisements There are some skin infections … Read more
Hey, in this article I will discuss the complement pathway which is one of the easiest pathways. Basically, This complement pathway helps to kill microorganisms by antibodies or phagocytosis. The complement pathway has been accomplished in three main ways, which I have discussed step by step below. Believe me, if you understand the first step … Read more
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