The Band of Stability
... Radioactive decay changes the nature of an atom’s nucleus, and it happens for a reason. Each element from hydrogen (atomic number 1) to lead (atomic number 82) has stable isotopes in which the tendency of protons to repel one another is overcome by attractive nuclear forces. These attractive nuclear ...
... Radioactive decay changes the nature of an atom’s nucleus, and it happens for a reason. Each element from hydrogen (atomic number 1) to lead (atomic number 82) has stable isotopes in which the tendency of protons to repel one another is overcome by attractive nuclear forces. These attractive nuclear ...
UCLA Endocrinology continues to provide expertise
... Fine needle aspiration is routinely performed to distinguish benign thyroid nodules from thyroid cancer. When an endocronologist in UCLA’s South Bay practice performs a biopsy, an on-site cytotechnologist helps prepare the specimen, ensuring the sample is adequate so the biopsy will not have to be r ...
... Fine needle aspiration is routinely performed to distinguish benign thyroid nodules from thyroid cancer. When an endocronologist in UCLA’s South Bay practice performs a biopsy, an on-site cytotechnologist helps prepare the specimen, ensuring the sample is adequate so the biopsy will not have to be r ...
Chemistry Lecture No.4______By : Asst. Lect. Tariq-H-AL
... effects), damage to the fetus, and genetic damage. It has been known for many years that radiation causes cancer. Skin cancer, bone cancer, leukemia, and other cancers are products of exposure to radiation. Even at very low levels of exposure, there is danger from radiation. For example, x rays used ...
... effects), damage to the fetus, and genetic damage. It has been known for many years that radiation causes cancer. Skin cancer, bone cancer, leukemia, and other cancers are products of exposure to radiation. Even at very low levels of exposure, there is danger from radiation. For example, x rays used ...
Notes: Nuclear Chemistry
... gamma rays have no mass, and are waves rather than particles, the elements atomic number does not change after emission. X-rays : X-rays are a form of highly penetrating electromagnetic radiation having a wavelength that is much shorter than that of visible light. These rays are usually produced by ...
... gamma rays have no mass, and are waves rather than particles, the elements atomic number does not change after emission. X-rays : X-rays are a form of highly penetrating electromagnetic radiation having a wavelength that is much shorter than that of visible light. These rays are usually produced by ...
The endocrine system
... Gastrointestinal: Stimulation of the gut results in hypermotility, malabsorption, and diarrhea. Cardiac: Palpitations and tachycardia are common. Neuromuscular: nervousness, tremor, and irritability and muscle weakness (thyroid myopathy). Ocular manifestations: a wide, staring gaze and lid lag are p ...
... Gastrointestinal: Stimulation of the gut results in hypermotility, malabsorption, and diarrhea. Cardiac: Palpitations and tachycardia are common. Neuromuscular: nervousness, tremor, and irritability and muscle weakness (thyroid myopathy). Ocular manifestations: a wide, staring gaze and lid lag are p ...
chapter 5 Radioactivity
... to be strong to force protons and neutrons to stay together in an incredibly tiny space. It is the electromagnetic force, another of the four fundamental forces, which holds atoms together and keeps electrons surrounding the nucleus. The electromagnetic force manifests itself through forces between ...
... to be strong to force protons and neutrons to stay together in an incredibly tiny space. It is the electromagnetic force, another of the four fundamental forces, which holds atoms together and keeps electrons surrounding the nucleus. The electromagnetic force manifests itself through forces between ...
The Endocrine System Abby
... cells from glucose up taking them, so you don’t gain diseases like diabetes types 1 and 2. A system that is dependent on me is the digestive system. A disease I can get is diabetes type 1 or 2 if the pancreas doesn’t succeed at it’s job. I would like to introduce you to the adrenal gland. ...
... cells from glucose up taking them, so you don’t gain diseases like diabetes types 1 and 2. A system that is dependent on me is the digestive system. A disease I can get is diabetes type 1 or 2 if the pancreas doesn’t succeed at it’s job. I would like to introduce you to the adrenal gland. ...
Endocrine/Metabolic Alterations
... Less mature than any other body system Pituitary gland is formed by the 4th month of gestation and measurable amounts of hormone can be detected Newborn’s level of TSH is 10 times higher than levels seen in older children. Initial thyroid function tests cannot be interpreted using normal standards o ...
... Less mature than any other body system Pituitary gland is formed by the 4th month of gestation and measurable amounts of hormone can be detected Newborn’s level of TSH is 10 times higher than levels seen in older children. Initial thyroid function tests cannot be interpreted using normal standards o ...
Thyroid - CMA`s English Mastiffs
... be clinically normal for years, only to become hypothyroid at a later date. The marker for autoimmune thyroiditis, thyroglobulin autoantibody formation, usually occurs prior to the occurrence of clinical signs. Therefore, periodic retesting is recommended. The majority of dogs that develop autoantib ...
... be clinically normal for years, only to become hypothyroid at a later date. The marker for autoimmune thyroiditis, thyroglobulin autoantibody formation, usually occurs prior to the occurrence of clinical signs. Therefore, periodic retesting is recommended. The majority of dogs that develop autoantib ...
Radioactive Decay
... Positron emission : a particle that has the same mass as an electron, but has a positive charge and is emitted during some types of radioactive decay. ...
... Positron emission : a particle that has the same mass as an electron, but has a positive charge and is emitted during some types of radioactive decay. ...
Practical Strategies for Management of the Pseudo
... association with TSH levels that are low, normal or slightly elevated. Primary hypothyroidism is most often due to autoimmune lymphocytic thyroiditis, surgery or radiation therapy. Hypothalamic-pituitary-thyroid axis physiology is highly complex, involving hypothalamic and pituitary regulation of t ...
... association with TSH levels that are low, normal or slightly elevated. Primary hypothyroidism is most often due to autoimmune lymphocytic thyroiditis, surgery or radiation therapy. Hypothalamic-pituitary-thyroid axis physiology is highly complex, involving hypothalamic and pituitary regulation of t ...
Nuclear Decay
... Gamma Decay - after a nuclear reaction such as alpha or beta decay has occurred, the daughter nucleus is in high-energy, or excited state. As a result the nucleus spontaneously releases energy in the form of a gamma ray to return to a lower more stable energy state. gamma ray - a highly energetic fo ...
... Gamma Decay - after a nuclear reaction such as alpha or beta decay has occurred, the daughter nucleus is in high-energy, or excited state. As a result the nucleus spontaneously releases energy in the form of a gamma ray to return to a lower more stable energy state. gamma ray - a highly energetic fo ...
Objectives for Nuclear Chemistry
... When a nucleus is changed and the atom is converted from one atom to another, this is called transmutation. This can be accomplished either naturally or artificially by the bombardment of the element with high-energy particles. Some isotopes are naturally unstable. Radium-226, Thalium-234 are both u ...
... When a nucleus is changed and the atom is converted from one atom to another, this is called transmutation. This can be accomplished either naturally or artificially by the bombardment of the element with high-energy particles. Some isotopes are naturally unstable. Radium-226, Thalium-234 are both u ...
Ch 21 Nuclear - coolchemistrystuff
... beta particle (undergoes beta emission) -Nuclei below the belt can increase their neutron to proton ratio by positron emission or electron capture -Positron emission is more common among lighter nuclei -Electron capture becomes common as nuclear charge increases -Nuclei with atomic numbers ≥ 84 tend ...
... beta particle (undergoes beta emission) -Nuclei below the belt can increase their neutron to proton ratio by positron emission or electron capture -Positron emission is more common among lighter nuclei -Electron capture becomes common as nuclear charge increases -Nuclei with atomic numbers ≥ 84 tend ...
hello
... Ch. 39-1 & 39-2: I. Endocrine System FUNCTION: Transmit chemical messages to control growth, development & metabolism ...
... Ch. 39-1 & 39-2: I. Endocrine System FUNCTION: Transmit chemical messages to control growth, development & metabolism ...
06_Medical equipment based on ionizing radiation principle
... Acute dose … means a person received a radiation dose over a short period of time. Somatic effects … are effects from some agent, like radiation that are seen in the individual who receives the agent. Genetic effects … are effects from some agent, that are seen in the offspring of the individual who ...
... Acute dose … means a person received a radiation dose over a short period of time. Somatic effects … are effects from some agent, like radiation that are seen in the individual who receives the agent. Genetic effects … are effects from some agent, that are seen in the offspring of the individual who ...
Thyroid Problems in Golden Retrievers
... Lastly we would like to thank all of our volunteers and supporters. Without you, GRR would not exist. 445 dogs have been cared for by GRR in our 3½ years of operation. Over 400 families have been completed by the addition of a furry golden into their midsts. Each and every one of them thanks you fro ...
... Lastly we would like to thank all of our volunteers and supporters. Without you, GRR would not exist. 445 dogs have been cared for by GRR in our 3½ years of operation. Over 400 families have been completed by the addition of a furry golden into their midsts. Each and every one of them thanks you fro ...
Half-Life - Chemistry 1 at NSBHS
... Rates of Nuclear Decay These stone tools from the archaeological site in Cactus Hill, Virginia, are at least 15,000 years old. Scientists estimated the age of the site based on rates of nuclear decay. ...
... Rates of Nuclear Decay These stone tools from the archaeological site in Cactus Hill, Virginia, are at least 15,000 years old. Scientists estimated the age of the site based on rates of nuclear decay. ...
Chapter 13
... 26. Why is zinc important for food digestion? 27. What is one specific reason that iron and zinc can interfere with each other, if their relative abundances are highly skewed? 28. Why can a low meat, high grain and legume diet put a vulnerable person at risk for zinc deficiency? 29. Why do vegetable ...
... 26. Why is zinc important for food digestion? 27. What is one specific reason that iron and zinc can interfere with each other, if their relative abundances are highly skewed? 28. Why can a low meat, high grain and legume diet put a vulnerable person at risk for zinc deficiency? 29. Why do vegetable ...
The Endocrine System
... • Type 1 diabetes: this can occur at any age, however, it is most often diagnosed in children, adolescents, or young adults • Insulin is a hormone produced by special cells, called beta cells, in the pancreas • Insulin is needed to move blood sugar (glucose) into cells, where it is stored and later ...
... • Type 1 diabetes: this can occur at any age, however, it is most often diagnosed in children, adolescents, or young adults • Insulin is a hormone produced by special cells, called beta cells, in the pancreas • Insulin is needed to move blood sugar (glucose) into cells, where it is stored and later ...
NUCLEAR CHEMISTRY
... decrease the emission of radiation, especially gamma rays, from nuclear reactors. Control rods – neutron-absorbing rods that help control the reaction by limiting free neutrons. Moderator – used to slow down the fast neutrons produced by fission Uranium-235 is usually the fuel Coolant is simply wate ...
... decrease the emission of radiation, especially gamma rays, from nuclear reactors. Control rods – neutron-absorbing rods that help control the reaction by limiting free neutrons. Moderator – used to slow down the fast neutrons produced by fission Uranium-235 is usually the fuel Coolant is simply wate ...
Radioactivityunit6
... • The process of causing a large nucleus (A > 120) to split into multiple smaller nuclei, releasing energy in the process. • It can start when the large nuclei absorbs a neutron, causing it to become unstable to the point that it falls apart. • This is the reaction that we use in nuclear power plant ...
... • The process of causing a large nucleus (A > 120) to split into multiple smaller nuclei, releasing energy in the process. • It can start when the large nuclei absorbs a neutron, causing it to become unstable to the point that it falls apart. • This is the reaction that we use in nuclear power plant ...
Hyperthyroidism - Cats Protection
... to bring levels of thyroxine under control – uncontrolled hyperthyroid cats are high risk anaesthetic cases • if one gland is affected and removed, the other side may become affected at a later date, causing symptoms to recur – both sides may be removed to prevent this • in cases where a malignant ...
... to bring levels of thyroxine under control – uncontrolled hyperthyroid cats are high risk anaesthetic cases • if one gland is affected and removed, the other side may become affected at a later date, causing symptoms to recur – both sides may be removed to prevent this • in cases where a malignant ...
CASE 34
... do not bring about moment-to-moment regulation. T3 and T4 enter cells by simple diffusion. Most of the T4 is converted to T3, which then binds with nuclear receptors to modulate the transcription of a number of proteins involved in cellular metabolism. By upregulating the synthesis of these proteins ...
... do not bring about moment-to-moment regulation. T3 and T4 enter cells by simple diffusion. Most of the T4 is converted to T3, which then binds with nuclear receptors to modulate the transcription of a number of proteins involved in cellular metabolism. By upregulating the synthesis of these proteins ...
Iodine-131
Iodine-131 (131I), also loosely and nonspecifically called radioiodine, is an important radioisotope of iodine discovered by Glenn Seaborg and John Livingood in 1938 at the University of California, Berkeley. It has a radioactive decay half-life of about eight days. It is associated with nuclear energy, medical diagnostic and treatment procedures, and natural gas production. It also plays a major role as a radioactive isotope present in nuclear fission products, and was a significant contributor to the health hazards from open-air atomic bomb testing in the 1950s, and from the Chernobyl disaster, as well as being a large fraction of the contamination hazard in the first weeks in the Fukushima nuclear crisis. This is because I-131 is a major uranium, plutonium fission product, comprising nearly 3% of the total products of fission (by weight). See fission product yield for a comparison with other radioactive fission products. I-131 is also a major fission product of uranium-233, produced from thorium.Due to its mode of beta decay, iodine-131 is notable for causing mutation and death in cells that it penetrates, and other cells up to several millimeters away. For this reason, high doses of the isotope are sometimes less dangerous than low doses, since they tend to kill thyroid tissues that would otherwise become cancerous as a result of the radiation. For example, children treated with moderate dose of I-131 for thyroid adenomas had a detectable increase in thyroid cancer, but children treated with a much higher dose did not. Likewise, most studies of very-high-dose I-131 for treatment of Graves disease have failed to find any increase in thyroid cancer, even though there is linear increase in thyroid cancer risk with I-131 absorption at moderate doses. Thus, iodine-131 is increasingly less employed in small doses in medical use (especially in children), but increasingly is used only in large and maximal treatment doses, as a way of killing targeted tissues. This is known as ""therapeutic use.""Iodine-131 can be ""seen"" by nuclear medicine imaging techniques (i.e., gamma cameras) whenever it is given for therapeutic use, since about 10% of its energy and radiation dose is via gamma radiation. However, since the other 90% of radiation (beta radiation) causes tissue damage without contributing to any ability to see or ""image"" the isotope, other less-damaging radioisotopes of iodine such as iodine-123 (see isotopes of iodine) are preferred in situations when only nuclear imaging is required. The isotope I-131 is still occasionally used for purely diagnostic (i.e., imaging) work, due to its low expense compared to other iodine radioisotopes. Very small medical imaging doses of I-131 have not shown any increase in thyroid cancer. The low-cost availability of I-131, in turn, is due to the relative ease of creating I-131 by neutron bombardment of natural tellurium in a nuclear reactor, then separating I-131 out by various simple methods (i.e., heating to drive off the volatile iodine). By contrast, other iodine radioisotopes are usually created by far more expensive techniques, starting with reactor radiation of expensive capsules of pressurized xenon gas.Iodine-131 is also one of the most commonly used gamma-emitting radioactive industrial tracer. Radioactive tracer isotopes are injected with hydraulic fracturing fluid to determine the injection profile and location of fractures created by hydraulic fracturing.Much smaller incidental doses of iodine-131 than those used in medical therapeutic procedures, are thought to be the major cause of increased thyroid cancers after accidental nuclear contamination. These cancers happen from residual tissue radiation damage caused by the I-131, and usually appear years after exposure, long after the I-131 has decayed.