several cyanine dyes and then interpret them to a simple model of the electronic structure of the π system: the Particle in a Box. Theoretical Model “Particle in a Box” In the Particle in a Box model‚ all potential energy interactions are assumed to be zero (constant) along the chain except at ends of the chain where the potential energy abruptly goes to +. If a particle moving freely along the length of the box the energy can be calculated as :
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focus our attention towards gold nano–particles and their biomedical application in targeting cancer. Different types of gold nano-particles will be discussed and how they are used for in-vitro assays‚ in-vivo and ex-vivo imaging‚ cancer therapy and drug delivery. The key feature of nano-particles is multifunctionality. These particles have many properties that are attractive for use in cancer therapy and thus there is huge potential of using nano-particles for cancer therapy. Keywords—nanoscale;
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Particle in a Box Lab March 25‚ 2014 Kassandra Brady‚ Samantha Imler‚ & Michael Montone CHEM 353 Abstract: Introduction: Method I: Absorption Spectra of Conjugated Dyes This method analyzes a series of dyes with alternating double bonds. It is assumed that the π electrons are free to move and ignoring the electro static repulsion among the π electrons themselves. The theoretical model applied in this experiment is the particle in the box. The model states that a single particle moves free
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TAP 601-1: Brownian motion Brownian motion (named after the botanist Robert Brown) is the presumably random drifting of particles suspended in a fluid (a liquid or a gas) or the mathematical model used to describe such random movements‚ which is often called a particle theory. The experiment of Brownian motion in a smoke cell is a classic experiment that gives strong circumstantial evidence for the particulate nature of air. Materials: ✓ Smoke cell‚ incorporating a light source
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know has the job of cleaning up our rooms. And that’s about it. It drives out the dust and other particles that we do not want in our room which mainly includes waste. The broom shares a similarity with alum. Alum attracts all the particles towards it self (coagulates) and settles down at the bottom of the vessel. The broom does exactly that. Its hair brushes away all the dust and waste particles and renders the room neat and clean. That’s exactly what some of us good people end up doing either
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liner‚ moved outwardly and caught between the crushing members. The impact of the head results in reduction of material by grinding and by facture of particle-upon-particle caused by forceful relocation to the particles within the mass. Even at the closest approach of the attrition members‚ the liners are still separated by a layer of small particles of substantial thickness. In most instances it has been found that a better product and greater usable quantity of desired size is obtained by increase
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OIL AND WEAR PARTICLE ANLYSIS Abstract: Oil and wear particle analysis is a very powerful tool used to monitor and assess the health of a machine. Since the lubricant in a machine passes through all the internal parts that can wear‚ it is vital to maintain the quality of the lubricant thought oil analysis. Furthermore the presence of wear particles that are deposited in the oil can give a good indication of the wear material and the possible location of the abnormal wear
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terms of meson theory was extremely tentative & incomplete‚ but this theory supplies a valuable point of view. Yukawa first pointed out that nuclear force can be explained by assuming that particle of mass about 200 times the electron mass(mesons) exist & can be emitted & absorbed by nuclear particles(neutrons & protons) with such
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Astronomy/Origins 2B03 “The Big Questions” Lecture #34 What makes a particle “elementary” ? • A particle is elementary if it has no inner structure (i.e not “made” of some even smaller entities). Quarks and leptons are the most elementary particles we know about at this time. They are no larger than 10-18 [cm] The Standard Model • Quarks and leptons are the most fundamental particles of nature that we know about. • Up & down quarks and electrons make up ordinary matter.
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are Particle Physics‚ Astrophysics‚ Theoretical Physics‚ Mechanical Physics‚ Quantum Physics well known as (Quantum Mechanics) lastly there is Biophysics. But the type of physicist i want to be is to be an particle physicist. an particle physicist is a branch of physics dealing with the‚ properties‚ and interactions of elementary particles especially as revealed in experiments using particle accelerators —called also high-energy physics. the idea is that all matter is composed of elementary particles
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