By: Tami Port MS
DNA paternity testing makes it possible to, with a very high degree of certainty, determine the identity of a child's biological father. Here's how.* What Is DNA? *Everyone, except identical twins, has a unique set of genetic instructions made of DNA (deoxyribonucleic acid). DNA...
By: Tami Port MS
Whether you know it or not, eukaryotic cells are the tiny units of life that make up your entire body. Read on and learn more about yourself!* What Is a Cell? *Living things are constructed of cells, and these most basic units of life...
Bacteria acid fast stain reaction
By: Tami Port MS
Acid fast staining involves the application of a series of dyes that leaves some bacteria pink (Acid-fast) and others purple (Nonacid-fast). In order to understand how this stain works, it is important to learn about the type of bacteria identified using the acid-fast stain.*...
Bacteria endospore stain protocol
By: Tami Port MS
Endospore staining involves application of a series of dyes. Malachite green stains the endospores and safrinin dyes vegetative cells pink. Here is the endospore stain procedure. But before discussing the procedure for staining endospores, it is important to understand what these unique structures are and...
By: Tami Port MS
* Did You Know that Bacteria Can Come Down with a Virus? *Bacteriophages (a.k.a. phages) are a type of virus that preys only upon bacterial cells. The reproduction of these parasitic acellular particles always involves death of the infected bacterium, when the viruses...
API-20E bacterial identification test strip
By: Tami Port MS
Differential stains and media can provide preliminary identification of microbes, but to identify Gram- bacteria to the species, a more sophisticated test is required.* Bacterial Identification * Differential staining of bacteria can provide preliminary information when a medical technician is attempting to identify an...
Bacterial genetics: Horizontal gene transfer
By: Tami Port MS
Although bacterial reproduction results in the generation of clones (vertical gene transfer), prokaryotes can undergo genetic recombination through the horizontal gene transfer methods of transformation, transduction, and conjugation.* Vertical Gene Transfer (VGT) *Bacteria reproduce through binary fission, a process of asexual reproduction in which...
Microbial control: How to kill bacteria and other microbes
By: Tami Port MS
Heat, UV radiation, antibiotics and chemicals are all used to control bacteria, viruses and other microorganisms. How to they kill pathogens without hurting our cells? * How Control Agents Damage Microbes * There are many different methods used to control the growth of microorganisms. However...
Choanoflagellates: Missing link between unicellular and multcellular organisms
By: Tami Port MS
New research provides more evidence that ancestors of modern choanoflagellates may be the evolutionary bridge linking single-celled and multi-celled organisms. Choanoflagellares are single-celled eukaryotic cells classified as protozoans; tiny organisms that more closely resemble animals than plants. These tiny organisms are also very flexible in...
Differential bacterial growth media: MacConkey's, mannitol salt and blood agar
By: Tami Port MS
In microbiology, there are many different techniques used to identify microbes. Differential media typically provide general information regarding identity.* Bacterial Identification * Tools like differential media and stains help microbiologists to narrow down the microbial suspects, but don't necessarily provide the specific identity of...

 

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