Radioactive Isotopes Radioactive isotopes are any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha‚ beta‚ and gamma rays. Every chemical element has one or more radioactive isotopes. More than 1‚000 radioactive isotopes of the various elements are known.. Approximately 50 of the isotopes are found in nature; the rest are produced artificially as the direct products
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of imaging‚ the number of adverse events has only increased in clinical settings across the past decade. MRI is considered the safest imaging modality because it can produce the most information from a patient while not delivering any ionizing radiation‚ unlike x-rays‚ fluoroscopy‚ etc. New safety screening technologies and safety practices have much promise in reducing these adverse events. MRI is a noninvasive diagnostic technology that can also be used with pregnant women‚ growing children‚ but
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Microstrip Antenna using different feed techniques and study the effect of antenna dimensions Length (L)‚ Width (W) and substrate parameters relative Dielectric constant (εr)‚ substrate thickness on Radiation parameters of Band width. Low dielectric constant substrates are generally preferred for maximum radiation. The conducting patch can take any shape but rectangular and circular configurations are the most commonly used configuration. Other configurations are complex to analyze and require heavy numerical
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situation for an agriculture based country like india. We hope these findings throw some light on the grave situation and let people think about the alternates. Electromagnetic waves or radiation [pic] The electromagnetic waves that compose electromagnetic radiation can be imagined as a self-propagating transverse oscillating wave of electric and magnetic fields. This diagram shows a plane linearly polarized EMR wave propagating from left to right. The electric field is
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Newton’s Laws of Motion and Gravity Define mass‚ weight‚ force‚ and acceleration. Mass – A measure of the total amount of material in a body‚ defined either by the inertial properties of the body or by its gravitational influence on other bodies. It is proportional to‚ but not the same as‚ its mass Force – A quantitative description of the interaction between two physical bodies‚ such as an object and its environment. Force is proportional to acceleration. Acceleration – A vector quantity that
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something about the wavelengths that make up a particular type of radiation (i.e.‚ the spectrum of radiation)‚ one could use an object such as simple diffraction parallel-slit grating in the form of a spectrometer. For example‚ molecules‚ atoms‚ and nuclei typically radiate or scatter radiation that corresponds to discrete frequencies and hence discrete wavelengths‚ λ. Knowing the spectrum (the intensity and wavelengths) of these radiations can tell us a lot about the molecule‚ atom‚ and nucleus under
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Terminology n Radiation ¨ ¨ n Food irradiation ¨ n Rays of energy Emission and propagation of energy through matter or space by electromagnetic disturbances Application of radiation‚ as ionizing energy‚ to foods Electromagnetic spectrum ( of radiation) Radiation Is the Energy! Irradiation Is the Process! 3 Terminology n n Electromagnetic spectrum (of radiation) Organized scale of electromagnetic radiation: ¨ radio waves‚ ¨ visible light‚ ¨ microwaves‚ ¨ ionizing radiation n frequency‚
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nuclear chemistry with medicine is the form of radiation. There are types of methods used to apply radiation to the human body to outline some they will be medical imaging (X rays) and radiation therapy which are in the emphasis of nuclear medicine. Also nuclear chemistry has some other methods that deals with nuclear medicine called analytic methods which are using radioactive isotopes for biological tracers and using isotopes for dilution. Radiation can have beneficial and harmful effects towards
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the influence of gamma rays on germination and growth parameters of groundnut revealed suppressive effect compared to non irradiated seed. Groundnut seed (Narayani) were exposed to gamma 60 rays ranging from 0.70 kGy to 2.30 kGy using CO gamma radiation (GC 5000) facility at Quality Control Laboratory‚ Acharya N.G Ranga Agricultural University‚ Rajendranagar‚ Hyderabad during 2010-2011. To find out LD50 dose for the seed and further investigate the influence on germination and seedling parameters
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Electromagnetic radiation (EM radiation or EMR) is a form of radiant energy‚ propagating through space via photon wave particles. In a vacuum‚ it propagates at a characteristic speed‚ the speed of light‚ normally in straight lines. EMR is emitted and absorbed by charged particles. As an electromagnetic wave‚ it has both electric and magnetic field components‚ which oscillate in a fixed relationship to one another‚ perpendicular to each other and perpendicular to the direction of energy and wave propagation
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