Laminar flow hood is a laboratory equipment containing a bench that provides an aseptic environment for scientist (biologist) to work with their samples. The use of laminar flow has been adopted in the microbiology laboratory, botany, chemistry, virology and pharmaceutical laboratory. The primary reason for using laminar flow hood is to avoid the contamination of …
Category: Bionuggets
Methods of making competent cells in prokaryotes
The ability of bacteria to take up exogenous DNA usually from closely related species which are exposed into their environment and incorporate it into their genome is known as competence, the process known as transformation. Some bacteria naturally can incorporate exogeneous DNA into their genome; these bacteria are called naturally competent bacteria. Examples include Streptococcus …
DISCOVERIES AND DISCOVERERS IN THE FIELD OF BIOLOGY
Kindly check the table below to find a list of selected notable contributions of some scientists to biology
Description of DNA Recombination
DNA recombination is referred to as the making of a functional composite DNA strand that is obtained from two or three fragments from more than one organism. The composite DNA is often called recombinant DNA. This is made possible through genetic engineering. An aspect of genetic engineering known as molecular cloning makes recombinant DNA production …
IMMUNIZATION
Do you know that smallpox vaccine is made from inactivated smallpox viruses?. Do you know that polio vaccine is composed of inactive polio viruses?. Get to know WHY inactive form of microorganisms are used in vaccinating humans against infections here.
HYPERSENSITIVITY: DELAYED IMMUNE REACTIONS
123 … after 2 weeks of persistent cough with blood-stained sputum, constant fatigue, weight loss, and fever. He visited the physician who recommended him for the Mantoux test. He was injected with tuberculin intradermally and observed after 2 days for induration.
HYPERSENSITIVITY: IMMUNE COMPLEX REACTIONS
1234 What happens when a small number of body soldiers (the antibodies) confront a numerous caravan of intruders (the antigens) in battle inside our body?. Meet hypersensitivity: immune complex reactions for the answer and don’t forget to take our quiz after reading.
HYPERSENSITIVITY: CYTOTOXIC REACTIONS
1–31–3 Ever been in the hospital, sitting with a patient who is urgently in need of blood transfusion and wondered why physicians keeping on rejecting willing donors after laboratory screening, or why willing tissue donors were rejected by physicians due to donor-patient tissue incompatibility?. Meet Hypersensitivity: Cytotoxic reactions for the answer, you will love it!.
HYPERSENSITIVITY: ANAPHYLACTIC REACTIONS
Ever wondered why you cough, sneeze, get a runny nose and red-eye after inhaling dust particles. Ever wondered why you vomit and itch after taking in penicillin and chloroquine respectively?. The reasons are best explained in anaphylactic reactions.
IMMUNOLOGY: UNDERSTANDING THE COMPLEMENT SYSTEM
Resolving to the use mercenaries by a General to help heighten his defensive line, while fighting an opposition is a very good strategy for winning battles. Complement proteins are mercenaries produced regularly by the liver cells and employed in fighting infections in the body.