DNA and the Gene: Synthesis and Repair 1) Watson and Crick elucidated the structure of DNA in 1953. Their research built on and helped explain the findings of other scientists‚ including ________. A) X-ray diffraction studies by Rosalind Franklin and Maurice Wilkins. B) Chargaff’s rules: C = G and T = A. C) Scientists who recognized that a nucleotide consisted of a sugar‚ a phosphate‚ and a nitrogen-containing base. D) All of the above were important considerations in the elucidation of
Premium DNA James D. Watson Genetics
The History of the Discovery of Radiation and Radioactivity Introduction: Radiation can be defined as the propagation of energy through matter or space. It can be in the form of electromagnetic waves or energetic particles. Ionizing radiation has the ability to knock an electron from an atom‚ i.e. to ionize. Examples of ionizing radiation include: • alpha particles • beta particles • neutrons • gamma rays • x-rays Non-ionizing radiation does not have enough energy to ionize atoms in the material
Premium X-ray Electron Gamma ray
Lit 2 May 2013 History of Cancer: Radiation There is a broad group of different types of cancers and they all have a wide range of causes. Each cancer is different according to its biology and pathophysiology. Cancer is a very broad topic but chose four topics that show that radiation is the main cause of cancer. Before I can prove radiation is the cause of cancer‚ there needs to be an introduction as to what cancer is and how it spreads
Premium Cancer Oncology
purpose is to provide information on cell phone radiation‚ the risks that can be caused by cell phone radiation‚ and the potential health problems that could result from this. Details of the topic: I am going to talk about the arguments about how cell phone radiation can affect our lives and whether these arguments are accurate or not. Cell phone radiation is a type of electromagnetic radiation that has the ability to cause health issues. The radiation from this device can cause serious brain tumours
Premium Mobile phone Brain tumor
A patient may receive radiation therapy before‚ during‚ or after surgery. Some patients may receive radiation therapy alone‚ without surgery or other treatments. Some patients may receive radiation therapy and chemotherapy at the same time. The timing of radiation therapy depends on the type of cancer being treated and the goal of treatment (cure or palliation). Radiation therapy given before surgery is called pre-operative or neoadjuvant radiation. Neoadjuvant radiation may be given to shrink a
Premium Cancer Oncology Chemotherapy
Case-Study Guidant 1.How attractive is the radiation therapy opportunity for Guidant? First we will determine the size of the market and its growth potential. Then we will assess the attractiveness of the market for radiation therapy in general using the concept of Porter’s 5 forces. Furthermore we will connect this information with Guidant’s specifics and its complementary assets to find out if this specific market is attractive for the company. Market size and growth potential The market’s
Premium Radioactive decay Ionizing radiation Radiation therapy
Radiation therapy (RT) is an essential component in the interdisciplinary treatment of brain tumors. Independently of histology‚ radiation plays a central role and has shown to increase local tumor control. Developments in radiation oncology are always aiming at an increase precision of dose delivery: More conformal coverage of target volumes‚ steep dose gradients to surrounding tissues‚ and sparing of organs at risk (OAR). In photon therapy‚ based on 3D-RT‚ stereotactic radiotherapy was a big step
Premium Cancer Oncology Chemotherapy
The radiation protection to be practiced → cell phone radiation During normal use‚ over half of the radiation transmitted by your mobile phone is absorbed by your head or body. Around 80% of the phone’s microwave emissions are absorbed by the head. Only shielding or distance to the phone can reduce their severe impact. The United Nations World Health Organization has classified mobile phone radiation as possibly cancer causing and advise that it is important for mobile phone users to minimize
Premium Mobile phone
Is Cell Phone Radiation Really Harmful? With sixty percent of the world’s population using cell phones‚ recent concern has risen from the medical front concerning the harmful effects of cell phone use. All scientific research has concluded that mobile phones do produce RF energy and emit electromagnetic radiation. Studies have also concluded that high levels of RF energy can be harmful to human health. However‚ all scientific studies have not agreed if the levels of RF energy emitted from modern
Premium Mobile phone
Blackbody radiation is the electro-magnetic radiation emerging from a small hole in a perfectly black box containing electromagnetic radiation at a high temperature. Scientists were interested in setting standards for the electric and thus measured the distribution of the total electromagnetic energy in a black box among the different wavelengths of the light. But not until Max Planck‚ at the turn of the century‚ was a single mathematical formula for the observed distribution of the energy among
Premium Photon Quantum mechanics Light