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1 How radioactive is the human body? - Live Science
https://www.livescience.com/radiation-human-body
Though these isotopes make up most of our body's radiation, we take in only about 0.39 milligrams of potassium 40 and 1.8 nanograms of carbon 14 ...
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2 Radioactive Human Body
https://sciencedemonstrations.fas.harvard.edu/presentations/radioactive-human-body
"There are 1.2 radioactive atoms of 40K for every 10,000 nonradioactive atoms of potassium. There is of the order of 140 g of potassium in an adult who weighs ...
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3 How Are Isotopes Important in Studying the Human Body?
https://sciencing.com/isotopes-important-studying-human-body-14726.html
Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei; when introduced into the human body, ...
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4 Stable isotopes: their use and safety in human nutrition studies
https://www.nature.com/articles/s41430-020-0580-0
Stable isotopes have been used as tracers in human nutritional studies for many years. A number of isotopes have been used frequently to ...
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5 Carbon Isotopes Profiles of Human Whole Blood, Plasma ...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3086998/
Furthermore, plants and the food chains they support also have unique carbon isotope signatures. Humans, at the top of the food chain, ...
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6 Metal Stable Isotopes in the Human Body - GeoScienceWorld
https://pubs.geoscienceworld.org/msa/elements/article/11/4/265/137662/Metal-Stable-Isotopes-in-the-Human-Body-A-Tribute
The abundances of stable metal isotopes, which are naturally present in the body of humans and other organisms, tend to vary. This is known as ...
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7 Stable isotopes in the human body
https://www.hutton.ac.uk/sites/default/files/documents/posters/meier-augenstein/Meier-Augenstein_Stable_Isotopes_Human.pdf
Stable isotopes in the human body: we are what and where we eat ... Stable isotope incorporation of 2H into scalp hair reflects source water.
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8 How Radioactive Isotopes are Used in Medicine | Britannica
https://www.britannica.com/story/how-radioactive-isotopes-are-used-in-medicine
Radioactive isotopes, or radioisotopes, are species of chemical elements that are produced through the natural decay of atoms.
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9 Are there nuclear reactions going on in our bodies?
https://wtamu.edu/~cbaird/sq/2013/09/11/are-there-nuclear-reactions-going-on-in-our-bodies/
The most common natural radioactive isotopes in humans are carbon-14 and potassium-40. Chemically, these isotopes behave exactly like stable ...
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10 Using Isotopes in Human Hair to Reveal Personal ...
https://nij.ojp.gov/topics/articles/using-isotopes-human-hair-reveal-personal-characteristics-forensic-investigations
Isotopes are different forms of the same chemical element that can be measured accurately and compared. For forensic purposes, isotope ratios of ...
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11 What are Isotopes? | IAEA
https://www.iaea.org/newscenter/news/what-are-isotopes
The IAEA remains involved in studies in developing countries in which body fat stores are measured using isotope techniques. IAEA-supported maternal nutrition.
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12 What are Radioisotopes? | ANSTO
https://www.ansto.gov.au/education/nuclear-facts/what-are-radioisotopes
Different isotopes of the same element have the same number of protons in their atomic nuclei but differing numbers of neutrons. Radioisotopes are radioactive ...
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13 DOE Explains...Isotopes - Department of Energy
https://www.energy.gov/science/doe-explainsisotopes
Isotope Facts · All elements have isotopes. · There are two main types of isotopes: stable and unstable (radioactive). · There are 254 known stable isotopes. · All ...
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14 Metal Stable Isotopes in the Human Body - ResearchGate
https://www.researchgate.net/publication/282524032_Metal_Stable_Isotopes_in_the_Human_Body_A_Tribute_of_Geochemistry_to_Medicine
... The stable isotopes of biologically important elements are widely used in biomedical research and medical applications [1][2][3][4][5] [6] [ ...
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15 Uranium | Toxzine | ATSDR
https://www.atsdr.cdc.gov/sites/toxzine/uranium_toxzine.html
Uranium that is absorbed is deposited throughout the body; the highest levels are found in the bones, liver, and kidneys. Sixty-six percent of the uranium in ...
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16 Use of mercury isotopes to quantify sources of human ...
https://www.sciencedirect.com/science/article/pii/S0160412020322911
Hg isotopes are useful tracers to understand human Hg exposure sources and metabolic processes. Abstract. The pathways of human mercury (Hg) exposure are ...
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17 The chemical brothers: why isotopes are useful | The Elements
https://academic.oup.com/book/780/chapter/135421390
Radioactive isotopes differ in the stability of their nuclei. Measuring the speed of decay allows scientists to date archaeological finds, and even the universe ...
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18 2.1 Elements and Atoms: The Building Blocks of Matter
https://openstax.org/books/anatomy-and-physiology-2e/pages/2-1-elements-and-atoms-the-building-blocks-of-matter
Identify the key distinction between isotopes of the same element; Explain how electrons occupy electron shells and their contribution to an ...
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19 Radioisotopes in Medicine - World Nuclear Association
https://world-nuclear.org/information-library/non-power-nuclear-applications/radioisotopes-research/radioisotopes-in-medicine.aspx
Over 10,000 hospitals worldwide use radioisotopes in medicine, and about 90% of the procedures are for diagnosis. The most common radioisotope used in diagnosis ...
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20 Radiation Sources and Doses | US EPA
https://www.epa.gov/radiation/radiation-sources-and-doses
Radioactive Materials in the Earth and in Our Bodies ... Uranium and thorium naturally found in the earth are called primordial primordial Existing since the ...
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21 A global carbon and nitrogen isotope perspective on ... - PNAS
https://www.pnas.org/doi/10.1073/pnas.2024642118
Stable carbon and nitrogen isotope analyses are widely used to infer diet and mobility in ancient and modern human populations, potentially ...
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22 How does nuclear radiation affect the human body? - ABC
https://www.abc.net.au/science/articles/2011/06/21/3245821.htm
Different variations of elements, known as isotopes, decay by different methods and give off different types of radiation, so they can have ...
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23 Chapter 1 - Elements and Atoms - BIO 140 - Human Biology I
https://guides.hostos.cuny.edu/bio140/1-1
The elements in the human body are shown in Figure 1, beginning with the most abundant: oxygen (O), carbon (C), hydrogen (H), and nitrogen (N).
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24 Using stable isotope techniques in nutrition assessments and ...
https://www.cambridge.org/core/journals/proceedings-of-the-nutrition-society/article/using-stable-isotope-techniques-in-nutrition-assessments-and-tracking-of-global-targets-post2015/8E0A549E17DBD01C8F94A12E1A32AC1A
Stable isotopes are non-radioactive, safe and are applied for various purposes in human health assessment in trace amounts that minimally disturb normal ...
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25 What radioactive isotope is found in the human body?
https://homework.study.com/explanation/what-radioactive-isotope-is-found-in-the-human-body.html
Even through the human body is made up of millions of different cells and many different kinds of organs, scientists have found that there are only six elements ...
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26 Isotope - Wikipedia
https://en.wikipedia.org/wiki/Isotope
Isotopes are two or more types of atoms that have the same atomic number and position in the periodic table and that differ in nucleon numbers (mass ...
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27 Accidents at Nuclear Power Plants and Cancer Risk - NCI
https://www.cancer.gov/about-cancer/causes-prevention/risk/radiation/nuclear-accidents-fact-sheet
Unstable isotopes, which are also called radioactive isotopes, give off (emit) ionizing radiation as part of the decay process. Radioactive ...
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28 Stable Isotopes In Nutritional Studies
http://www.tracesciences.com/nutritionalstudiesisotopes.html
The first paper published that described the use of a stable isotope tracer in a human metabolic study was in 1963. Today, there are four commonly studied ...
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29 Strontium Isotope Analysis
https://cais.uga.edu/service/strontium-isotope-analysis/
Archeologists use the isotope ratios of strontium to determine residential origins and migration patterns of ancestral humans. The human body incorporates ...
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30 Calcium Intake and Peak Bone Mass | NEJM
https://www.nejm.org/doi/full/10.1056/NEJM199207093270210
The ratios of the stable calcium isotopes in all terrestrial materials are virtually identical and were determined during nucleosynthesis 4.5 ...
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31 Oxygen Isotopes | SpringerLink
https://link.springer.com/10.1007/978-1-4020-4409-0_22
Stable isotopes are variants of atoms that differ in mass but do not decay over time, that is, they are not radioactive.
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32 Isotopes Matter - De Gruyter
https://www.degruyter.com/document/doi/10.1515/ci-2019-0107/html?lang=en
For example, in the case of a radioactive isotope, consider that the human body contains the element potassium and one of its isotopes, ...
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33 Calcium Isotopes in Human Urine as a Diagnostic Tool for ...
https://www.frontiersin.org/articles/10.3389/fphys.2019.00012/full
For example, body fluids are shifted toward the upper part of the body, and mechanical unloading of muscles and bones occurs in the lower ...
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34 Types and sources of radiation
http://nuclearsafety.gc.ca/eng/resources/radiation/introduction-to-radiation/types-and-sources-of-radiation.cfm
There are many types of ionizing radiation. The following are some of the ... The human body also contains several radioactive isotopes.
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35 How your bones record where you grew up and what you ate
https://www.nationalgeographic.com/culture/article/how-bones-record-where-grew-up-ate
There are over 250 known stable isotopes, and 80 of the periodic table's first 82 elements have them. Both organic and inorganic compounds ...
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36 Possible Mechanisms of Biological Effects Observed in Living ...
https://www.mdpi.com/1420-3049/24/22/4101/htm
This issue is of current interest, as there are now opportunities to correct the ratio of light and heavy isotopes of biogenic elements in the body via ...
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37 Heuser & Eisenhauer 10 Bone.pdf
https://websites.pmc.ucsc.edu/~pkoch/EART_229/10-0129%20Ca%20Isotopes/Heuser%20&%20Eisenhauer%2010%20Bone.pdf
proxy for the human body calcium balance, Bone (2009), doi:10.1016/j.bone.2009.11. ... empirical data Skulan and DePaolo [17] found that there is an isotope.
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38 On the Use of Biomineral Oxygen Isotope Data to Identify ...
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0153850
Oxygen isotopes can be measured in any human or animal body tissue [12, 18, 32–34], but in archaeological contexts the measured tissues are ...
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39 What is stable isotope analysis? - FutureLearn
https://www.futurelearn.com/info/courses/archaeology/0/steps/15267
Isotopes are present everywhere in the world in which we live and breathe but the balance (or ratios) in which different isotopes of the same elements occur ...
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40 Isotopes in cultural heritage: present and future possibilities
https://heritagesciencejournal.springeropen.com/articles/10.1186/s40494-018-0192-3
A commonly used division is between “traditional” stable isotopes of the light elements of primarily H, C, O, N and S, which are further ...
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41 Determination of Total Body Water and Solids With Isotopes
https://www.science.org/doi/10.1126/science.104.2694.157
GREGERSEN, M.I., Simultaneous determination of the plasma volume with T-1824, and the "available fluid" volume with sodium thiocyanate, AMERICAN JOURNAL OF ...
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42 The Radiography of the Human Body with Radioactive Isotopes
https://www.birpublications.org/doi/pdf/10.1259/0007-1285-25-298-517
photographic records of the distribution of radio- active isotopes in the body. Radiography with radioactive isotopes. There is a very general impression ...
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43 Half Lives Explained
https://dec.alaska.gov/eh/radiation/half-lives-explained/
Time is one of the three basic principles of radiation exposure. ... of the radioactive isotopes associated with a nuclear power plant with their physical ...
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44 Radium in Drinking Water Fact Sheet - IDPH
http://www.idph.state.il.us/envhealth/factsheets/radium.htm
Radium can be present in several forms, called isotopes. ... behaves similarly to calcium and is deposited in the tissues of the body, especially bone. Any ...
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45 5. How Do Radioactive Materials Move Through the ... - NJ.gov
https://www.nj.gov/dep/rpp/llrw/download/fact05.pdf
are present in our environment and in our bodies. We are, therefore, continuously exposed to radiation from radioactive atoms. (radionuclides).
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46 Nuclear Medicine: Radioisotopes
https://www.radiochemistry.org/nuclearmedicine/radioisotopes/01_isotopes.shtml
The atomic mass is the sum of the protons and neutrons. There are 82 stable elements and about 275 stable isotopes of these elements. When a combination of ...
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47 Technetium - Element information, properties and uses
https://www.rsc.org/periodic-table/element/43/technetium
Technetium long tantalised chemists because it could not be found. We now know that all its isotopes are radioactive and any mineral deposits of the element had ...
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48 Are radioactive isotopes safe? - Independent Imaging
https://www.independentimaging.com/radioactive-isotopes-safe/
How much radiation is there in isotopes? Very little, because of the way it decays. This is called “isomeric” process, and it involves the emitting of gamma ...
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49 The Use of Radioactive Sodium as a Tracer in the Study of ...
https://pubs.rsna.org/doi/10.1148/45.4.335
Such an isotope is radioactive sodium, Na24. Following its introduction into the body in any manner, its transfer by the blood and its arrival at any part can ...
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50 What do you use medical isotopes for? - Pallas Reactor
https://www.pallasreactor.com/en/medical-isotopes/where-do-you-use-medical-isotopes-for/
Nuclear therapy simply means that the radiation of medical isotopes is used ... where the isotopes with tracers are placed in the correct area of the body ...
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51 THE REGULATION AND USE OF RADIOISOTOPES IN ...
https://www.nrc.gov/reading-rm/doc-collections/nuregs/brochures/br0217/r1/br0217r1.pdf
these radioisotopes for use in our mod- ern, high-tech world. ... amount of radioisotope available for ... path through the body and its deposit.
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52 Recent applications of isotope analysis to forensic anthropology
https://www.tandfonline.com/doi/full/10.1080/20961790.2018.1549527
Modern-day isotopic investigations on human remains have integrated the use of multi-isotope profiles (e.g. C, N, O, H, S, Sr, and Pb) as well as isotopic ...
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53 Stable isotopes offer novel methods of disease detection
https://www.earthmagazine.org/article/stable-isotopes-offer-novel-methods-disease-detection/
“There is enormous potential there.” Wildlife and medical researchers suggest that if changes in a human's or animal's body can be monitored via ...
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54 RADIATION HEALTH BASICS
https://www.co.monmouth.nj.us/documents/118/RADIATION%20HEALTH%20BASICS.pdf
Gamma rays and X-rays are a radiation hazard for the entire body. While gamma rays and X-rays can easily pass completely through the human body,.
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55 Radioactive isotopes affecting the human body, illustration
https://www.sciencephoto.com/media/1058289/view/radioactive-isotopes-affecting-the-human-body-illustration
› media › view › radioa...
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56 Hydrometry (isotope dilution) - DAPA Measurement Toolkit
https://dapa-toolkit.mrc.ac.uk/anthropometry/objective-methods/hydrometry
Stable isotopes, like deuterium are safe to be used in children and in pregnancy. Limitations. Cost of the equipment, analysis and isotope: For the plateau ...
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57 Positron Emission Tomography (PET) | Johns Hopkins Medicine
https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/positron-emission-tomography-pet
Next, the PET scanner slowly moves over the part of the body being examined. Positrons are emitted by the breakdown of the radionuclide. Gamma rays called ...
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58 Carbon-14 is a low energy beta emitter and even
https://ehs.yale.edu/sites/default/files/files/radioisotope-c14.pdf
The beta radiation barely penetrates the outer protective dead layer of the skin of the body. The major concern for individuals working with this isotope is ...
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59 Evaporative fractionation of volatile stable isotopes and their ...
https://royalsocietypublishing.org/doi/10.1098/rsta.2013.0259
Some of the strongest available evidence for a co-genetic origin for the ... of volatile depletion in planets and parent bodies [19,39,41].
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60 Isotopes of Hydrogen - Plutonium, Deuterium, Tritium ... - Byju's
https://byjus.com/chemistry/isotopes-of-hydrogen/
Radioactive isotopes are types of chemical elements formed by the natural decay of atoms. Radiation exposure is generally considered hazardous to the human body ...
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61 STRONTIUM-90 - Delaware Health and Social Services
https://dhss.delaware.gov/dph/files/strontiumfaq.pdf
In the body, strontium acts very much like calcium. A large portion of the strontium will build up in bones. In adults, strontium mostly attaches to the ...
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62 The elusive roles of metals in human health - Research Features
https://researchfeatures.com/elusive-roles-metals-human-health/
But man cannot live on SPONCH alone. The remaining two and a half percent of your body are largely metals − sodium, potassium, magnesium, ...
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63 A study of uranium excreted in urine - NATO
https://www.nato.int/du/docu/ge010229a.pdf
Uranium mainly enters the human body through the ingestion of food and water. ... and depleted uranium differ only in their isotopic composition, ...
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64 An Introduction to Isotopic Calculations
https://www.whoi.edu/cms/files/jhayes/2005/9/IsoCalcs30Sept04_5183.pdf
These deviations from perfect chemical equivalence are termed isotope effects. As a result of such effects, the natural abundances of the stable isotopes of ...
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65 How Radiation Therapy Is Used to Treat Cancer
https://www.cancer.org/treatment/treatments-and-side-effects/treatment-types/radiation/basics.html
This means it's usually aimed at and affects only the part of the body needing treatment. Radiation treatments are planned so that they ...
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66 What is the function of hydrogen in the human body?
https://www.jagranjosh.com/general-knowledge/what-is-the-function-of-hydrogen-in-the-human-body-1509018695-1
Approx 90 percent of all atoms are made up of hydrogen. It is an element which is present in all the fluids of the human body which allows the ...
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67 Periodic table.pdf
https://nscl.msu.edu/public/Periodic%20table.pdf
There are 7 known isotopes of Hydrogen. ... Of the 22 known isotopes, there are 3 stablo and ... bodies during the last melting of Ice Age glaciers.
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68 Technetium-99m - | Washington State Department of Health
https://doh.wa.gov/sites/default/files/legacy/Documents/Pubs//320-083_tc99_fs.pdf
It is an isotope of the artificially produced element technetium and it has almost ideal characteristics for a nuclear medicine scan. These characteristics are:.
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69 Radiation Sickness - NORD (National Organization for Rare ...
https://rarediseases.org/rare-diseases/radiation-sickness/
As a rule, large doses of radiation are of concern because of their immediate effects on the body (somatic), while low doses are of concern because of the ...
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70 Radioisotopes in Medicine - OSTI.GOV
http://www.osti.gov/includes/opennet/includes/Understanding%20the%20Atom/Radioisotopes%20in%20Medicine.pdf
passed through human tissue without causing any immediate ... When gamma rays emitted by a tracer isotope in the patient's body.
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71 FDA's Role in Helping a Critical Medical Isotope Meet ...
https://www.fda.gov/drugs/news-events-human-drugs/our-perspective-fdas-role-helping-critical-medical-isotope-meet-sufficient-supply-us-first-time
Medical isotopes are used by health care professionals to diagnose and treat health conditions such as heart disease and cancer. The production ...
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72 Using isotopes as tracers - Science Learning Hub
https://www.sciencelearn.org.nz/resources/1801-using-isotopes-as-tracers
Radioactive isotopes and radioactively labelled molecules are used as tracers to identify abnormal bodily processes. This is possible because ...
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73 The Role of Radioisotopes in Medical Diagnostic Procedures
https://www.youthstem2030.org/youth-stem-matters/read/the-role-of-radioisotopes-in-medical-diagnostic-procedures
The length of the half-lives of the radioisotopes determines which applications they are suitable for. Radioisotopes that have short half-lives ...
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74 Ionizing radiation, health effects and protective measures
https://www.who.int/news-room/fact-sheets/detail/ionizing-radiation-health-effects-and-protective-measures
People are exposed to natural radiation sources as well as human-made sources on a daily basis. Natural radiation comes from many sources ...
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75 What Are Radioactive Isotopes? | Properties of Matter - YouTube
https://www.youtube.com/watch?v=UYvx0O8itMA
FuseSchool - Global Education
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76 Ionizing Radiation - Background | Occupational Safety ... - OSHA
https://www.osha.gov/ionizing-radiation/background
Radionuclides (also known as radioisotopes) are elements in an unstable form, which are radioactive but will lose their radioactivity over time through ...
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77 Total Body Water Applications | Metabolic Solutions
https://www.metsol.com/stable-isotope-analysis/applications/total-body-water/
Total body water (body composition) has been measured using stable isotopes of oxygen (oxygen-18) and deuterium (deuterium oxide, D2O) for more than 50 years.
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78 Human Radiation Experiments | Atomic Heritage Foundation
http://www.atomicheritage.org/history/human-radiation-experiments
... the effects of radioactive materials on the human body. ... toxicity of radioactive isotopes including plutonium, uranium, and polonium.
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79 The Supply of Medical Isotopes: An Economic Diagnosis and ...
https://www.oecd.org/health/the-supply-of-medical-isotopes-9b326195-en.htm
These scans allow diagnoses of diseases in many parts of the human body, including the skeleton, heart and circulatory system, and the brain ...
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80 Types of Radiation Emissions and their Decay - Stanford EH&S
https://ehs.stanford.edu/manual/radiation-protection-guidance-hospital-staff/types-radiation-emissions-and-their-decay
Drugs also leave the body physiologically, usually through urine. The physical and biological half-lives work together to remove radioisotopes from the human ...
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81 General Nuclear Medicine - Radiology Info
https://www.radiologyinfo.org/en/info/gennuclear
The gamma camera detects the energy from the radiotracer in your body and converts it into an image. The gamma camera itself does not emit any radiation. It has ...
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82 Radionuclide (Isotope) Scan - Patient.info
https://patient.info/treatment-medication/radionuclide-scan-isotope-scan
A radionuclide scan is a way of imaging bones, organs and other parts of the body by using a small dose of a radioactive chemical. There are ...
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83 Radiation and Health
https://www.health.ny.gov/publications/4402/
About 40 percent of this dose comes from radioactive materials that occur naturally in our bodies. The rest comes from outer space, cosmic radiation, or from ...
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84 Radioisotope: Applications, Effects, and Occupational Protection
https://www.intechopen.com/chapters/62736
The bulk of the natural radiation is mainly due to 40K and 238U, 232Th, and their decay products [7]. Natural uranium consists of three isotopes 234U, 235U, and ...
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85 Uses of stable isotopes in clinical diagnosis and research in ...
https://adc.bmj.com/content/84/5/444
20 Following isotope administration and equilibration, isotopically labelled hydrogen will leave the body as water (urine plus evaporative losses), whereas ...
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86 Isotope Basics | NIDC
https://isotopes.gov/isotope-basics
Isotopes are atoms of the same element that have the same number of protons (i.e., atomic number, "Z") but a different number of neutrons, meaning that their ...
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87 Matter, elements, and atoms | Chemistry of life (article)
https://www.khanacademy.org/science/ap-biology/chemistry-of-life/elements-of-life/a/matter-elements-atoms-article
The four elements common to all living organisms are oxygen (O), carbon (C), hydrogen (H), and nitrogen (N), which together make up about 96% of the human body.
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88 11.5: Uses of Radioisotopes - Chemistry LibreTexts
https://chem.libretexts.org/Courses/Sacramento_City_College/SCC%3A_CHEM_330_-_Adventures_in_Chemistry_(Alviar-Agnew)/11%3A_Nuclear_Chemistry/11.05%3A_Uses_of_Radioisotopes
Radioactive isotopes are effective tracers because their ... Depending on the area of the body being imaged, a radioactive isotope is either ...
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89 FAQ - Nuclear Medicine | UCLA Health
https://www.uclahealth.org/medical-services/nuclear-medicine/patient-information/faq
In very rare cases there can be an allergic reaction to the chemical to which the radioactive isotope is attached to. If you should have an allergic ...
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90 'Perhaps the most important isotope': how carbon-14 ...
https://www.theguardian.com/science/2019/aug/10/most-important-isotope-how-carbon-14-revolutionised-science
But atoms of the same element can possess different numbers of neutrons in their nuclei. These different forms are known as isotopes. Carbon has ...
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91 Elements of the human body arranged by percent of total mass
http://kolibri.teacherinabox.org.au/modules/en-boundless/www.boundless.com/biology/textbooks/boundless-biology-textbook/the-chemical-foundation-of-life-2/atoms-isotopes-ions-and-molecules-50/the-periodic-table-275-11408/images/elements-of-the-human-body-arranged-by-percent-of-total-mass/index.html
There are 25 elements believed to play an active role in human health. Carbon, hydrogen, oxygen, and nitrogen make up approximately 96% of the mass in a human ...
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92 Isotopes for Medicine and the Life Sciences (1995)
https://www.nap.edu/read/4818/chapter/4
Large amounts of enriched stable isotopes of the light elements such as carbon, nitrogen, and oxygen are particularly important for biomedical research (e.g., ...
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93 Using Isotopes to Tell the Stories of the Unidentified - ISHI News
https://www.ishinews.com/using-isotopes-to-tell-the-stories-of-the-unidentified/
While many are quickly found, it is estimated that 4,400 unidentified bodies are recovered each year, with 1,000 of them remaining unidentified ...
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94 Question Video: Understanding Radioactive Tracers - Nagwa
https://www.nagwa.com/en/videos/209153169379/
Jul 20, 2019
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