How to interpret beta hemolysis on blood agar bacterial growth media
By: Tami Port MS
Some growth media, such as Blood Agar (BAP), can be used to do more than just grow bacteria; specialized agars can be used to help identify microbes.* Blood Agar Is a Differential Medium *A growth medium is considered differential if, when specific microbes are...
External structures of prokaryotic cells
By: Tami Port MS
Many prokaryotes have distinct appendages, delicate strands made of protein, that extend beyond the surface of the cell. Whip-like flagella enable some bacteria to move about, shorter extensions, called fimbriae, enable bacteria to adhere to surfaces and, for pathogenic (bad guy) bacteria, allow them to...
By: Tami Port MS
Fimbriae are external structures of Gram- cells which enable bacteria to adhere to surfaces and, as virulence factors, mediate infection of host cells. Most Gram-negative bacteria have these short, fine appendages surrounding the cell. In contrast, Gram-positive bacteria lack fimbriae.* How Do Fimbriae Help...
Invasive species: Emerald ash borer
By: Denise Calaman
The emerald ash borer (Agrilus planipennis), is a destructive beetle native to Asia that is fast becoming a pest in the United States and Canada. This invasive species has already destroyed tens of millions of trees since first being discovered in the Michigan in 2002...
What are bacterial fimbriae?
By: Tami Port MS
Many bacteria, particularly those with Gram- cell wall structure, have external appendages; delicate strands of protein that extend beyond the surface of the cell. These external structures of bacteria can come in many forms. Long, thin flagella are used by some bacteria to move about...
By: Lian Slayford-Wei
Medicinal Plants in South-western Saudi Arabia Medicine, whether traditional folk medicine or mass-produced pharmaceutical drugs, have been beneficial in curing and treating all manner of diseases and illnesses throughout the centuries. Indeed, it is from the traditional folk medicine that has allowed us to make...
The habitat of coyotes
By: PK Hawk
Coyotes are perhaps the most adaptable animal in nature. They are most at home in places like the desert, mountains and plains of nearly every continent except for the Arctic and the Antarctic. They are right at home or can adapt to just about any...
Overview: The red cherry
By: Phyllis Logie
Red cherries, especially the ‘tart’ variety is a superfruit, high in photochemical known as anthocyanins and in common with other fruits and vegetables red in colour, it has been shown to be of benefit to individuals who suffer from rheumatoid arthritis and diabetes. It...
How are amino acids built into proteins
By: Joshua Horn - 257112
Proteins are a critical part of the functioning of all life. They make up over 50% of the dry weight of any given living cell and are critical for many important biological processes and systems, including maintaining structure, catalyzing reactions and cell signaling. The basic...
Prokaryotic Microbe Cell Biology
By: Joshua Horn - 257112
Prokaryotes are a varied type of organism that can be found in every niche that exists worldwide. They are simply organisms that lack any membrane bound organelles in their cellular structure. They are contrasted to eukaryotes, which feature a true nucleus and membrane bound organelles...

 

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