Radioisotope Thallium

6. 7. 8. 9. 10. 11. 12. 13. 14. 15. i. b d j c k e l a f

2. What is the half-life of a 100.0 g sample of nitrogen-16 that decays to 12.5 g of

Glucose is oxidized, as we can see there is no longer any H attached to the carbon and oxygen. It loses electrons therefore is being oxidized.

Demarcay observed in the spectrum of radioactive barium chloride several lines that could not be assigned to any known element and whose intensity increased with the radioactivity.

The radiological material that Professor X decides to employ, after researching radioisotopes, is Iridium-192. Iridium-192 is commonly used in industrial radiography machines; something a government weapons contractor could require (Medalia 2011). Being the supply representative, Professor X places a large, credible order for the certain components he needs and keeps the order entirely off the record books.

The thallium scan offers many advantages. It is noninvasive except for the administration of the radioisotope, which involves a radiation dose slightly larger than that received during a chest x-ray, and is extremely accurate. The radionuclide emits 80 keV x-rays they are suitable for scintillation camera imaging.

The Caesium irradiator we used is a self-shielded irradiator that is a self-contained device in which the shielding required for operation is an integral part of the device, and the irradiation chamber is not accessible during operation. A Cs-137 source is used to irradiate a wide range of products and materials. The majority of the irradia-tors are not designed for large throughputs. The irradiation of explosive or flammable materials is prohibited. In this type of irradiator, the sources are fixed and housed within the radiation shield. The shield contains a rotor that is operated by an electric drive. The sample chamber is contained within the rotor and has an electric turntable. During operation, the rotor turns 180 degrees and the sample

A teratogen is defined as “A drug or other substance capable of interfering with the development of a fetus, causing birth defects” (Teratogen). In this essay I will be introducing the harms of teratogens and elaborating on a few of them. Although teratogens is a very general term and envelopes a lot, I will be discussing three specific types of teratogens that are very harmful for the fetus. The three main topics of this essay will be: Drugs, Alcohol, and Infectious diseases. Hopefully, this essay will expose the harmful consequences of the use of teratogens.

Stress testing: exercise stress tesing is used to elevate the cardiac response to physical stress eg. Running, cycling. This provides information on the myocardial response to increasing oxygen needs and see the capability of coronary blood

The radioisotope Fluorine-18 is a radioactive isotope of fluorine. Fluorine has nine protons and ten neutrons, fluorine-18 has only nine neutrons which is less than normal. F-18 produces gamma radiation in the body, gamma rays are electromagnetic waves with an extremely high frequency, unlike alpha and beta radiation, gamma has no mass, and travel at a speed of light with the ability to penetrate human skin, only stop by lead. F-18 is used as a tracer in nuclear medicine imaging, specifically positron emission tomography (PET) scans. PET scans are used to provide precise and sophisticated three dimensional images for diagnosis of diseases within the body such as cancer. During its creation in the cyclotron particle accelerator, F-18 is combined

Answer: The subjects in the study were regularly tested on their vital signs, echocardiogram and clinical laboratory tests.

Teratogens are agents that can cause abnormalities and such agents include; drugs, chemical, infections, alcohol, and tobacco in different types of cigarette, pollutants, maternal health states, as well as maternal age and nutrition. The teratogenic agents can be disastrous to the developing human being from the moment of conception to birth and through life. Teratogens can be present in the women’s body before conception take place and it can affect the unborn baby at birth delivery or manifest later in the life of the individual child.

The radioactive isotopes are atoms with the same number of protons and electrons, but a different number of neutrons and atomic weight, and are described as have an unstable nucleus. The radioactive isotope produces gamma rays when it undergoes beta plus decay, also know as positron emission, occurring after the radioactive isotope undergoes change inside the nucleus. This change starts when an atom's proton is converted into a neutron inside the nucleus resulting in the loss of a positive charge, and a small amount of mass being lost. This mass is referred to as a positron. Then the positron after release collides with an electron and annihilation of the particles occur, producing two gamma rays. These gamma rays are the radioactive emissions that are then detected by the imaging machine. Isotopes with a short half life are selected for positron emission topography, and generally take around 18- 20 min to decay inside the body. Some of the common isotopes that are used in the radioactive drug tracers are chromium-51, technetium-99m, thallium-201, xenon-133, barium-313, strontium-87 (Denniston

Within this report I will be analysing carbon 14 a radioisotope. A radioisotope is a radioactive isotope and isotopes are atoms that have the same number of protons but different number of neutrons in their nuclei. Carbon-14 is a radioisotope of the element carbon.

Sodium-24's main use is to detect leakage from water pipes underground. It is introduced as a compound such as 2411NaCl into the water pipes and then undergoes continuous decay to emit beta and gamma radiation. Then mostly the gamma radiation is detected at ground level, with any unusual or abnormal distributions or the radiation detected was an increased level meaning that there is leakage.