In the case of MRI it would allow for doctors to better locate uncommon cell growths and tumors. Sections of the patient’s body are exposed to a very strong magnetic field, then a radiofrequency pulse is applied causing some atoms even that of the contrast agent to spin and then relax after the pulse stops. The scanner would detect the energy emitted by the relaxation and
Abstract: Polyacrylates absorb liquids. Because of this unique property, many uses come from such a material. Diapers are the most widely known because of its purpose. But polyacrylates exhibit other properties. The purpose of this lab is to figure out how polyacylate reacts in the presence of salts and oil.
* A nanotube is a nanometer (Gr. nanos, “dwarf” + Gr. metron, “unit of measurement”) scale tube-like structure. It combines the SI prefix nano with the parent unit name metre, and is equal to one billionth of a meter, or 1.0 x 10-9 in scientific notation. * Carbon nanotubes (CNTs), one of the many forms of nanotubes, are tube-shaped molecules made of carbon-carbon bonded [allotropes (property of some chemical elements to exist in two or more different forms) of carbon] atoms.
Clinical microbiology MLT1 Task 9 Antibiotic Sensitivity Chandra Evans A) Selectively Toxic is defined by the fact that the antimicrobial treatment used, destroys selective microorganisms, but doesn’t harm the host. Selective toxicity of an agent is necessary so that during treatment the agent will not affect or interact with the normal functioning microorganisms in the host. The agent will interact with microbial structures and functions that are not the same as the microbial structures of the host. B) Broad spectrum antimicrobials are effective against a large range of both Gram-negative and Gram-positive microorganisms A pro of this type of agent is the fact that a variety of bacteria is targeted at the same time when used. A con is the higher risk of destruction of normal body flora.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which of the following is one of the body's first lines of defense against infection? A) several nonspecific antibodies 1) _____ B) several nonspecific amino acid toxins C) several nonspecific obstacles such as skin and mucous membranes ** D) increased production of certain hormones and changes in the blood circulation E) none of the above 2) What kinds of cells wander the interstitial fluid eating whatever bacteria and virus-infected cells they encounter and recognize? 2) _____ A) natural killer cells B) monocytes C) leukocytes D) macrophages ** E) interferons 3) Which of the following kinds of protein circulates in the blood and coats the surfaces of microbes to make them more susceptible to engulfment by macrophages?
MELATONIN, IMMUNITY AND STEROIDS ABSTRACT Melatonin is the secretion of pineal gland and a broad range of physiological functions are modulated by this hormone. Available finding of research shows that it is an immunomodulatory and anti-inflammatory hormone. In this review, melatonin and its interactions with immune system as well as steroids have been discussed. The immune system protects the body from microorganisms present all around the environment. The anti-inflammatory nature of melatonin connects it with the immune system.
Viruses are therefore employed as a medium to deliver the required gene with high efficiency into the target cells. Viral vectors are engineered using sophisticated methods such that the unwanted genes responsible for replication, assembling, or infection are replaced by the therapeutic gene. Current Viral vectors can further be categorized into, Non-lytic viruses, retroviruses and lentiviruses, produce virions from the cellular membrane of an infected cell, leaving the host cell relatively intact and Lytic viruses, human adenovirus and herpes simplex virus families, destroy the infected cell after replication and virion
PET scans can also show the brain in action which is useful for psychological research. However this is an extremely costly technique and therefore not easily available for research, also as the patient has to be injected with a radioactive substance, the technique can only be used a couple of times. PET scans are less precise than MRI scans. Twin studies are also of value to the bio psychologists in investigating the assumption that behaviour is due to our genetic makeup. MZ twins share 100% of their genes, same behaviour is
Besides this bacteriostatic effect, clarithromycin also has bactericidal effect on certain strains, such as Haemophilus influenzae, Streptococcus pneumoniae and Neisseria gonorrhea. Clarithromycin is acid-stable, so can be taken orally without being protected from gastric acids. It is readily absorbed, and diffused into most tissues and phagocytes. Due to the high concentration in phagocytes, clarithromycin is actively transported to the site of infection. During active phagocytosis, large concentrations of clarithromycin are released; its concentration in the tissues can be over 10 times higher than in plasma.
Medical Isotopes can be really good and beneficial to society in the correct use. They can be developed into different medical treatments. Some examples of these are: Brachytherapy that is used for curing different types of cancers and radioimmunotherapy that are isotopes sent to the blood to kill cancerous cells like the leukemia ones. Also it have been discovered that medical isotopes have a good effect on curing cardiovascular diseases. In Europe doctors have been injecting medical isotopes and it have been found that they can kill HIV that are not that developed.