Gram-Negative Bacteria – Structure, Characteristics, Examples

Structure of Gram-negative cell wall

Gram-negative bacteria are a diverse group of microorganisms known for their unique cell structure, which plays a key role in how they interact with the environment and cause infections. Unlike Gram-positive bacteria, Gram-negative bacteria have a thin peptidoglycan layer sandwiched between two membranes. The outer membrane contains lipopolysaccharides (LPS), which can trigger strong immune responses … Read more

Gram Positive bacteria – Definition, Structure, Characteristics, Examples

Gram Positive bacteria - Definition, Structure, Characteristics, Examples

Gram-positive bacteria are a group of bacteria classified based on how they react to a lab test called the Gram stain. When stained, these bacteria hold onto a purple dye because of their thick, mesh-like cell wall made of peptidoglycan. This sturdy layer acts like a protective shield, unlike Gram-negative bacteria, which have thinner walls … Read more

Coarse Adjustment and Fine Adjustment Knob of Microscope

Coarse Adjustment and Fine Adjustment Knob of Microscope

What is Fine Adjustment Knob? Particularly in high magnification levels, the fine adjustment knob is an essential part of a microscope as it helps to achieve exact and crisp focus. Particularly in the study of cells, microscopes are essential instruments in scientific inquiry as they let us view objects beyond our human sight. Under a … Read more

Pocket Microscope – Principle, Parts, Uses, Types

Pocket Microscope - Definition, Parts, Principle, Uses, Types

It is designed in a way that is compact and portable which is why it’s called a pocket’. They’re pocket-sized however some are bigger. Their size is not enough to be able to hold a mirror in order to put the image in the proper place. However, they contain a small stage where one can place an object to observe.  They’re portable so that they can be utilized by both professionals and amateurs according to the task they’re designed to fulfill.

How are samples prepared for a transmission electron microscope?

Transmission Electron  Microscope (TEM)

What is transmission electron microscope? A transmission electron microscope (TEM) is an electron microscope that transmits electrons through a sample to observe it. Scientists use transmission electron microscopes to analyze materials and examine their microstructural and compositional properties. A transmission electron microscope transmits a highly focused beam of electrons through a sample to observe and … Read more

Light Microscope – Labeled Diagram, Definition, Principle, Types, Parts, Applications

Light Microscope - Labeled Diagram, Definition, Principle, Types, Parts, Applications

This reflects the seemingly marvelous developments that have occurred from the history of microbiology to the present day. Advances in technology and subsequent research in the field over the years have meant that once we learned how to study these tiny creatures, we only grew in appreciation for these vital little agents. But in 1590, … Read more

Inverted Fluorescent Microscope – Principle, Protocol, Parts, Uses

Inverted Fluorescent Microscope - Principle, Protocol, Parts, Uses

What is Inverted Fluorescent Microscope? Ever peeked into the world of living cells? Scientists use a nifty tool called an inverted fluorescent microscope for this. Unlike regular microscopes, this one flips the script—literally. Imagine the lenses sitting above the sample and the light source shining from below. This upside-down setup makes it perfect for studying cells chilling at the bottom … Read more

History of the Microscope

History of the Microscope

Microscopes have been around for the ages. Roman philosophers had mentioned “burning glass” within their works. However, the first microscope of this type was not invented until the 1300’s. Two lenses were set on opposite sides of the tube. This tube of magnifying power was the basis for our modern-day microscope.

Digital Microscope – Principle, Parts, Uses, Advantages

USB Microscope - Principle, Definition, Parts, Examples, Uses

Digital microscopes are modern microscope which does not have an eyepiece. This is a huge contrast from an optical microscope. Digital microscopes have an electronic camera that acts as the detector as well as the imaging output gadget. It displays the images takes place via a computer’s screen or monitor, which defines the scope of the microscope’s digital.