WebRadiation therapy began with radium and with relatively low-voltage diagnostic machines. Several years ago, she noticed a lesion on her tongue, but dismissed it as an ulcer for about four months. The Evolution of Radiotherapy. All information these cookies collect is aggregated and therefore anonymous. of 250 times a day, which amounted to ingesting almost 2 grams of paint Between 1895 and 1900, X-ray treatments were used for a wide range of malignancies including gastric and skin carcinomas, as well as several benign conditions like eczema and lupus. 2021. [3] Pierre took on Marie as his [10] M. K. Thompson, et al., Cancer. [3] The breakthrough moment for metal that is naturally found in uranium ores. another element - one more radioactive than uranium. News Treatment linked to cancer risk Nasal radium was standard procedure in 1940s, 1950s; Hopkins pioneered method; But U.S. board recommends against History of Radiation Therapy Technology. These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. Radium, it was thought, was a good way to shrink tissues near the Eustachian tubes to treat deafness, reduce ear pain and damage from atmospheric changes and to decrease mucus secretions. The history of radiation therapy or radiotherapy can be traced back to experiments made soon after the discovery of X-rays (1895), when it was shown that exposure to radiation produced cutaneous burns. [1] Radium has 33 known isotopes, all of which are radioactive, and the By 1911, the principle of fractionation for external beam radiotherapy (XRT) and slow, continuous low-dose-rate (LDR) radium treatments were established. Wood had breast cancer and suffers from Hashimoto's disease, a rare type of thyroid enlargement, depression, anxiety and salivary-gland swelling. Becquerel would take Marie Curie under his tutelage as a doctoral student where they pursued the discovery of radium and other radioactive minerals. Read here: Radiotherapy for Breast Cancer, Inhibiting inflammatory signaling pathway could reduce the chances of heart disease in cancer survivors, New way to carry drugs across the blood-brain barrier using nanoparticles, New imaging method could help make better decisions on personalized cancer treatment, https://www.cancer.org/cancer/cancer-basics/history-of-cancer/cancer-treatment-radiation.html, Research reveals a candidate drug and biomarker to target uveal melanoma, International guidelines to help prevent and treat heart complications in pediatric oncology patients, New evidence strengthens link between low dose radiation and increased risk of heart disease, Active monitoring does not increase prostate cancer-specific mortality risk, study shows, Cancer treatments may impair heart function or cause long-term cardiac damage, Pathologic complete response can be used as a prognostic factor for clinical outcomes in soft tissue sarcoma patients, Scientists discover mechanism used by cancer cells to repair DNA damage induced by radiotherapy. Re: Radiation treatments back in the 50's and 60's. Marie would marry Pierre Curie, also a French Physicist and Nobel Prize winner. A linear accelerator, or special machines such as the Gamma Knife or CyberKnife, can be used to deliver this treatment. From initial therapeutic experiments, a new field of x-ray therapy was born, referred to as rntgenotherapy after Wilhelm Rntgen, the discoverer of x-rays. Mining operations for radium took place in the early 20. As early as 1948, there were hints of problems, with studies published about blood vessel lesions and thyroid cancer. [7] At approximately the same time, Emil Grubbe, of Chicago was possibly the first American physician to use x-rays to treat cancer, beginning in 1896, began experimenting in Chicago with medical uses of x-rays. "It's easy to pretend this issue doesn't warrant attention or just totally ignore it. when thirsty and upon arising and retiring, average six or more glasses daily." What will happen to me in the future? Patients like Virginia Blatchley feel the same way. X-ray experiments in pulmonary tuberculosis proved useless. Saving Lives, Protecting People, CDCs Morbidity and Mortality Weekly Report, Centers for Disease Control and Prevention, Information for Pregnant Women and Children, Radiation in Healthcare: Bone Density (DEXA Scan), Frequently Asked Questions about Cell Phones and Your Health, Wearable Computers and Wearable Technology, Radiation from the Earth (Terrestrial Radiation), Other Factors that Influence Health Effects, Removal of Radioactive Material (Decontamination), Dose Reconstruction Activities and the Cold War, Feasibility Study of Weapons Testing Fallout, Radioactive Fallout from Global Weapons Testing, CDC Activities, Resources, Health Studies & Recommendations, Radiation Emergencies Frequently Asked Questions (FAQ), Radiation Emergencies Health Information for Specific Groups, U.S. Department of Health & Human Services. The Historical Medical Library holds a variety of resources on radium, including the Frank Hartman papers. Marie Curie was a Polish-born and French-naturalized physicist and chemist, as well as the first woman in history to win the Nobel Prize, and the only woman to win twice. Between 1930 and 1950, a period that became known as the Orthovoltage era, significant progress was made in the treatment of deep cancers by radiation. [6] In the medical community, doctors began to use early stages Application of this treatment was referred to as iodo-radium therapy, and involved injecting dioradin intramuscularly. Conformal proton beam radiation therapy utilizes a similar approach to both CRT and IMRT; however, instead of X-rays, this approach instead delivers protons to cancer. The Orthovoltage era is often characterized by advances in brachytherapy and supervoltage X-ray treatment. Now the 56-year-old Pasadena man wonders if the treatment also explains the tumors in his back and lung. Accessed at www.curetoday.com/index.cfm/fuseaction/article.show/id/2/article_id/631 on June 7, 2012. scarcely used for medical treatments because of its high radioactivity. Hopkins expects to finish soon a study on people who had the radium treatment in the Hagerstown area. Following its discovery over 100 years ago, radium has been used in numerous industrial and consumer applications. Call number: MSS 2/0146, Radium Chemical Company medical trade ephemera, ca. high exposure levels to radioactivity, and the lack of accessibility of At the time, radiation had been tapped to treat medical conditions ranging from acne and birthmarks to cancer and gastrointestinal problems. on this website is designed to support, not to replace the relationship [2] G. Audi, et al., "The NUBASE 2016 Experts say it's a familiar pattern in society: New medical therapies are favored, and long-term risks are brushed off. News-Medical. [34], After using radium in the surgical treatment of tuberculosis, researchers including Bla Augustin and A. de Szendeffy soon developed a treatment using radioactive methyholated iodine, which was patented under the name dioradin (formed from "iodine and radium") in 1911. Haines treated Mandel with radium and pioneered its use at the Navy's submarine base near New London, Conn. "Even an exposure of twice the regular dose would have little or no unfavorable effects," wrote Haines in 1945 in a medical journal. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests. In France, a major breakthrough took place when it was discovered that daily doses of radiation over several weeks greatly improved the patients chance for a cure. During graduate school, Benedette investigated the dermatotoxicity of mechlorethamine and bendamustine; two nitrogen mustard alkylating agents that are used in anticancer therapy. "The doctor's first question was, 'Did you have radiation treatments?' That was considered the most expensive method, because the radium used was irreparably lost. https://www.news-medical.net/health/The-Evolution-of-Radiotherapy.aspx. of these commercial paints, was a mixture of Ra-226 and zinc sulfide, History of Cancer Treatments: Radiation Therapy [Online]. Regina Shaffer's daughter Luan had her tonsils and adenoids removed, but ear infections kept cropping up. apparent, many of the women working at the plant filed a lawsuit against Some of the most notable discoveries of this period include the Cobalt teletherapy, which is a technique that produces high-energy gamma rays, as well as potent linear accelerators that could deliver megavoltage X-rays. Inventive procedures for different diagnostic purposes were created, such as filling digestive cavities with bismuth, which allowed them to be seen through tissue and bone. [8] Many of the factory workers for The Radium Dial For these Winter 2014. Call number: MSS 2/0340, Memoranda of Marie Curie (scrapbook), 1898-1926, Robert Abbe papers Schipek (Springer, 2012). Niels Finsen, a Faroese-Danish physician, had by that time already pursued interest in the biological effects of light. But today, scientists disagree about the risk. Understanding the Role of Epigenetics in Cancer, Understanding Chronic Cough: Causes, Symptoms, and Diagnosis, Circumcised vs. Uncircumcised; Differences in the Penile Microbiome, Study finds little evidence of negative impact on mental health from increased home working during pandemic, Pregnancy's profound impact: How motherhood reshapes the female brain, AHA ranks popular US diets for cardiovascular fitness, Urgent call for improved diagnostics, treatments, and vaccines against deadly Hantavirus, Maternal diet and body composition show little impact on key milk components, genetics prevails. They threaded radium-tipped probes up through the nostrils to shrink swollen lymphoid tissue at the back of the nose. For many families like the Shaffers in Pennsylvania, nasal radium treatments seemed a miracle. From nanoparticle-based enrichment to mass spec refinements, they explore how these tools facilitate unbiased, deep, and rapid proteomics. The American Cancer Society is a qualified 501(c)(3) tax-exempt organization. Curie family and history of radium (album), 1960-1963, Radium City, Northwest Territory, 1934-1945. Becquerel's work became the Others, like Dr. Genevieve M. Matanoski, an epidemiologist at Hopkins, described the risk as small, while others point to accumulating evidence of danger. CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website. Henry G. Piffard referred to these practitioners as "radiomaniacs" and "radiografters". One distinct characteristic of IMRT is that the intensity of the beams can be adjusted, thus allowing physicians to gain even more control in how much radiation is delivered to both the tumor and normal tissues. [42], In light of the supposed curative properties of radioactivity, a spa was opened up in Joachimsthal, the place at which Madame Curie gathered some of her original samples of radium from spring waters. The public clinics where thousands of other Maryland schoolchildren were treated are closed. Weve invested more than $5 billion in cancer research since 1946, all to find more and better treatments, uncover factors that may cause cancer, and improve cancer patients quality of life. focused on a tumor, such as shown in Fig. Cancer. Webradium treatments as a newborn I was born in 1952 with a large stawberry mark over my head and forehead. What are the clinical considerations of proton radiotherapy for individuals with locally advancing breast cancer? Influenced by electrotherapy and escharotics the medical application of caustic substances doctors began using radiation to treat growths and lesions produced by diseases such as lupus, basal cell carcinoma, and epithelioma. What does it take to outsmart cancer? Baths were set up which were also irradiated, and irradiated air was also filtered through a trumpet-like pipe for inhalation. Babies with enlarged thymus glands underwent radiation treatment, because physicians believed they were more susceptible to frequent colds. [9] Freund's first experiment was a tragic failure; he applied x-rays to a naevus in order to induce epilation and a deep ulcer resulted, which resisted further treatment by radiation. Drink freely . 49, Suppl. Oncol. [9] R. B. Gunderman and A. S. Gonda, "Radium Girls," Many products which imitated emanation activators were more broadly marketed to the public. Becquerel for this purpose loaned some radium to Henri-Alexandre Danlos of the hpital St. Louis in Paris in 1901. There was immediate worldwide excitement. Radium inhalation had been most studied in Germany, where regular inhalation institutes were established, and the goal was to target the lungs. Further trials of radium therapy began, though at a much slower pace than did those using x-rays because radium was expensive and difficult to obtain. After the discovery of radioactivity in 1896 by French physicist and Nobel Prize winner, Antoine Henri Becquerel, many other scientists began to search for uses of radioactivity. Cancer.org is provided courtesy of the Leo and Gloria Rosen family. 3), whose work painting the dials was a streamlined process [8] Escharotics by this time had already been used to treat skin malignancies through caustic burns, and electrotherapy had also been experimented with, in the aim to stimulate the skin tissue. WebDecember 29 19481970s: Nasal Radium Irradiation (NRI) of Children at Johns Hopkins U.S. They help us to know which pages are the most and least popular and see how visitors move around the site. [6] C. E. Murdock, "Selling Scientific Authority: [48] In 1935, hospitals everywhere began following his treatment plan.[47]. [5] J. P. Adloff, "The Laboratory Notebooks of Pierre Here you'll find in-depth information on specific cancer types including risk factors, early detection, diagnosis, and treatment options. often spread deep within the bone tissue. Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website. Intensity-modulated radiation therapy (IMRT) is like CRT, but along with aiming photon beams from several directions, the intensity (strength) of the beams can be adjusted. physicist Henri Becquerel, who had discovered in 1896 an "invisible How are Women Emotionally Affected After a Hysterectomy? [41] Cases sprung up of the development of carcinoma in patients who had used conventional radium therapy up to 40 years after the original treatments. Dr. William Gray, an otolaryngologist who specializes in head and neck cancer at the University of Maryland Medical Center, agreed that these relatively rare cancers, which develop in inaccessible areas, would be difficult to diagnose early. X-rays were used to diagnose bone fractures, heart disease, and phthisis. [9] The workers would use their mouths to [citation needed], The first attempted x-ray treatment was by Victor Despeignes, a French physician who used them on a patient with stomach cancer. Symptoms of illness included Influenced by electrotherapy and escharotics the medical application of caustic substances doctors began using radiation to treat growths and lesions produced by diseases such as lupus, basal cell carcinoma, and epithelioma. Because they could not be applied locally, x-rays were also found to have worse cosmetic effects than radium when treating malignancies. H.W. WebBy the 1950s, Ra-226, the most stable isotope of radium, had been replaced in radiation therapy departments by artificial radioisotopes, such as Cs-137 and Ir-192, and by the Conformal radiation therapy (CRT), for example, combines computer tomography (CT) images with specialized tumors to allow physicians to identify tumors in three dimensions. by Stanford Cade, 1948-1952 [3] Today, radium is scarcely used for medical treatments because of its high radioactivity. A few months after Wilhelm Conrad Roentgen discovered X-rays in 1895, the fields of radiology and radiation oncology were born. in Fig. With little to no regulation of radium and other treatments in the early 20th century, ambitious medical doctors and salesmen looked to make products using radium to cure many ailments. These products ranged from additives in toothpaste to Revigator, which was water with radium dissolved into it. In 1896 a German physics professor, Wilhelm Conrad Roentgen, presented a remarkable lecture entitled Concerning a New Kind of Ray. Roentgen called it the X-ray, with x being the algebraic symbol for an unknown quantity. [41], Many other quack cures and patent medicines were sold on the market. Patients would drink from the container throughout the day to cure their ailments. Not to the thyroid so much, but to the thymus gland, adenoids and tonsils, for acne, other areas of the head and neck. later become her husband (Fig. the uranium content. Physicians are then able to carefully deliver radiation beams that are matched to the exact shape of the tumor in several directions. The answers to the questions that haunt so many may remain a mystery. The treatment, called nasopharyngeal irradiation, was pioneered by Johns Hopkins physicians. by Henry Harrington Janeway, 1917 at Sorbonne University in 1894 when she met Pierre Curie, who would Frank Hartman radium services records, undated: Radium products, applications, and price lists, Radium diary, 1942-1956: Notes the importance of radium, dangers, proper handling, newspaper clippings, and radium hunting, Scrapbook, undated: Dos and do nots in handling radium, Lecture notes regarding the Radium Products Company, 1925-1940: Information on radioactivity. [20], Because of the excitement over the new treatment, literature about the therapeutic effects of x-rays often exaggerated the propensity to cure different diseases. Cuffari, Benedette. WebCobalt therapy is the medical use of gamma rays from the radioisotope cobalt-60 to treat conditions such as cancer.Beginning in the 1950s, cobalt-60 was widely used in external beam radiotherapy (teletherapy) machines, which produced a beam of gamma rays which was directed into the patient's body to kill tumor tissue. the company, and industrial use of radium began to decline. "Radium In addition to radiation surgery, radiation can also be administered at the same time as when a surgical resection of a tumor is performed. Rather than treatment by xrays in a hospital, my mother took me to a private pediatrician who told her he could remove the birthmark painlessly. Inspired by this, using preparations of radium salts in bath water was suggested as a way for patients to be treated at home, as the radio-activity in the bathwater was permanent. analyse site usage and support us in providing free open access scientific content. Cancer Information, Answers, and Hope. Many children received the treatment more than once as recurrent lymphoid tissue was considered an indication for treatment. Sign up and be the first to find out the latest news and articles about what's going on in the medical field. As a radium hound, Hartman had firsthand experiences of dealing with and careful handling of radium in the early 20th century. Call number: Cg 156, X-rays and Radium in the Treatment of Diseases of the Skin and cancer, ultimately leading to violent and agonizing death. In 1901 Roentgen received the first Nobel Prize awarded in physics. VA officials took their position after reviewing the advisory committee's report and the advice of an expert panel that met at Yale University. After a lengthy These earliest treatments were generally delivered as single large exposures, by placing low-energy cathode ray tubes or radium-filled glass tubes in close proximity to tumors. Radium and other Radioactive Substances; Polonium, Actinium and Thorium. He stressed that radiation had the effect of making many cancers worse, many doctors thought the belief that radium could be used to cure cancers at that stage of the development of therapy was a "delusion" one doctor quoted cited a failure-to-success rate of 100 to 1 and the effects of radium water were undemonstrated. One method using emanation was through inhalation, where it was mixed with air. public. "They put cocaine up my nose first, then came the radium," recalls Judith Wood, 59, a North Stonington, Conn., homemaker, of her childhood treatments for recurrent colds. WebEarly in the 20th century there was a medical practice that revolved around a new treatment involving the radioactive material called radium. In this episode of omg OMx, Bruker's science-driven podcast, Kate Stumpo interviews Daniel Hornburg, the VP of Proteomics at Seer, as they discuss the innovative technologies in plasma proteomics. Face creams and powders were sold, with names like 'Revigorette' and 'Tho-radia'. Haines died in 1993, and doctors at his former practice declined repeated invitations to comment. American Society of Clinical Oncology. . most common and long-lived isotope is Ra-226, which comprises one part "I had confidence in the nasal radium treatment because I had confidence in the doctor, and I'm sure he was confident in it because it came from Hopkins," said Eleanore DiPietro, a registered nurse. More info. More info. These cookies may also be used for advertising purposes by these third parties. WebRepeated over a period of months, the treatment would shrink the patients' adenoids, relieving ear pressure and improving problems with balance. The American Medical Association (AMA) was concerned that the public was being fleeced by charlatans. [1] Radiation was generally believed to have bactericidal properties, so when radium was discovered, in addition to treatments similar to those used with x-rays, it was also used as an additive to medical treatments for diseases such as tuberculosis where there were resistant bacilli. "I just started to hear all of a sudden. Call number: GGd 29a, Radium therapy in cancer at the Memorial Hospital, New York (first report: 1915-1916) CureToday. To highlight how far the field of genetics has come, we spoke with Dr. Francis Collins, the leader of the Human Genome Project about his incredible career in genetics. H.W. Its also important to follow recommended screening guidelines, which can help detect certain cancers early. Aside from the medical profession losing faith in the ability of x-ray therapy, the public increasingly viewed it as a dangerous type of treatment. But the facts are real.". American Society of Clinical Oncology. Particle therapy is a special case of "radiation therapy" in which "emitted atomic particles" (such as electrons, protons, or neutrons) are used for energy delivery in therapy. The goal of research into these types of substances is to develop agents that will make the tumor more sensitive without affecting normal tissues. Whether you or someone you love has cancer, knowing what to expect can help you cope. This treatment was an accepted medical practice in the 1940s and 1950s to treat hearing loss, chronic otitus and other conditions in children and by the military for [44], At the International Congress of Oncology in Paris in 1922, Henri Coutard, a French radiologist working with the Institut Curie, presented evidence that laryngeal cancer could be treated without disastrous side-effects. Nuclear Radiology / Nuclear Medicine specializes in the internal delivery of particle therapy whereas Radiation Oncology specializes in the external and locoregional delivery of particle therapy. Call number: Qgg75, Cancer of the Breast and its Treatment IORT minimizes the amount of tissue thats exposed to radiation because normal tissues can be moved out of the way during surgery and shielded, allowing a higher dose of radiation to the cancer. 2023 American Cancer Society, Inc. All rights reserved. Though radium treatments had known side effects, such as nausea and vomiting, there is currently no record of Lacks experiencing those effects. of the Radium Girls include the formation of labor safety laws and 2013;119(23):4058-4082. [31] Radium baths became used experimentally to treat arthritis, gout, and neuralgias. Shoe stores even used an X-ray device to allow people to see whether their feet fit properly inside shoes. Marie Sklodowska was studying physics and mathematics CDC twenty four seven. Hartman, a radium specialist and consultant, spent most of his life inspecting, selling, consulting, or hunting down and returning radium. Radium," in The New Uranium Mining Boom, ed. From the 1920s to the late 1950s, ionising radiation was used as a treatment for benign skin lesions such as haemangioma [1, 2]. We can also help you find other free or low-cost resources available. The author warrants that the work Although this radiotherapy approach was first developed in 1954, it was not until the late 1970s that a computer-assisted accelerator was developed to successfully apply protons to various types of tumors. If you need to go back and make any changes, you can always do so by going to our Privacy Policy page. C 41, 03001 Retrieved on May 01, 2023 from https://www.news-medical.net/health/The-Evolution-of-Radiotherapy.aspx. A. Bailey to have curative properties. the latter of which would luminesce when struck by the alpha particles 1, 15 (1999). The radiation was filtered by 0.1 mm nickel or 0.5 mm plated silver which absorbed the low 76, 167 (2003). But instead of using x-rays, this technique uses proton beams. "The Evolution of Radiotherapy". They have an obligation to let us know, too," said Bass Bullock, 58, one of roughly 67,000 Marylanders who underwent nasal radium treatments as children. Where Are We 150 Years After the Birth of Marie Curie? by B. Merkel and M. radium, had been replaced in radiation therapy departments by artificial But Gray has treated several patients, including Victor DiPietro, whose cancers may have stemmed from their nasal radium treatments. Evaluation of Nuclear Properties," Chinese Phys. We couldnt do what we do without our volunteers and donors. radiation" emitted by uranium that caused photographic plates to darken [13], The nature of the active agent in therapeutic treatment was still unknown, and subject to wide dispute. In 1932, a well-known industrialist, Eben Byers died of radiation poisoning from the use of Radithor, a radium water guaranteed by the manufacturer to contain 2 Ci of radium. Military flight crews, facing similar problems from high altitudes, also received radium capsules. Researchers are also looking for substances that may help protect normal cells from radiation. In recent years, some have reported nasopharynx or tongue cancers, or conditions linked to the pituitary or thyroid gland. All are healthy. [4] She hypothesized that the pitchblende contained [24] Danlos successfully treated a few cases of lupus with an admixture of radium and barium chloride. It was also sold as a supplement to smoking cigarettes. Many brands of toothpaste were laced with radium that was claimed to make teeth shine whiter, such as Doramad Radioactive Toothpaste. Early development of radiotherapy (18951905), Discovery of the therapeutic potential of radiation, Further development and the use of radium (19051915), Commercialization, quackery, and the end of an era (19151935), "Roentgen rays in the treatment of skin diseases and for the removal of hair", "Brief comments on the Materia Medica and therapeutics of the year ending October 1, 1899 Roentgen rays", "X-rays in the treatment of cancer and other malignant diseases", "X-Ray Burns.Amputation of the Thigh, X-Ray Burns; Their Nature and Treatment", "Radium: Its value in the treatment of lupus, rodent ulcer, and epithelioma, with reports of cases", "New Research on the Idio-Radium Therapy in Tuberculose", "A study of the radio-activity of certain minerals and mineral waters", "Radium in the Treatment of Lymphangioma of the Tongue", "Radium Therapy with Special Reference to the Use of Radium in Dermatology", "The comparative value of radium and Roentgen radiation", "The Results and Methods of Treatment of Cancer by Radiation", "Iodine treatment apparatus for tuberculosis, France,18301870", https://en.wikipedia.org/w/index.php?title=History_of_radiation_therapy&oldid=1090855354, Articles with unsourced statements from October 2018, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 31 May 2022, at 19:42. patients, the radioisotope Ra-223 is used to treat the sarcomas, which The Radium Experiment Assessment Project also aims to promote medical surveillance and encourage further research. [5] The use of radiation continues today as a treatment for cancer in radiation therapy. Ostensibly, this would be because the radium would kill the bacteria in a person's mouth. The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical. Advancing Voluntary, Informed Consent to Medical Intervention. Two Hundred Years of Cancer Research. Call number: Qgg 44.2, *Content written by Patrick Elgert, Temple University Cultural Fieldwork Initiative intern, Radium: a medical treatment in the early 20th century. Radium clinics When WWI swept over Europe Another person who had the treatment, Donald Bock, has been diagnosed with a thyroid tumor. The legacy In 1904, Nature published a study on the natural radioactivity of different mineral waters.[30]. Garrity has become an activist, accumulating data from radium patients in order to lobby for federal aid for the sick. Radium Spas, Advertising and Popular Understandings of Radioactivity in
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