(1995) - They track variations in the star’s spectrum (51 Pegasi) - Conclude that there is a companion orbiting the star • Min mass: 0.5 Mj (1mj= mass of Jupiter) • Orbiting at: 0.05 AU (1AU= distance from earth to sun) 3. Methods o Doppler Spectroscopy - Just like the star causes a planet to move in an orbit around it‚ the planet causes its host star to move - If a star is being orbited by a planet‚ the radial velocity of the star changes as it moves towards and away from the observer. - This
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1.4 Formulation-related contaminations A few contaminations in a medication item or API can emerge from communications with excipients used to plan the medication item. During the time spent definition‚ a medication substance is subjected to different conditions that can prompt its debasement or different pernicious responses. For instance‚ if warmth is utilized for drying or for different reasons‚ it can encourage debasement of thermally labile medication substances. Arrangements and suspensions
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UV Spectroscopy: UV spectroscopy is concerned with ranges from 190 to 370 nm. Compound which are colourless absorb radiation in UV range. In both UV as well as visible spectroscopy only the valence electrons absorb the energy there by molecule undergoes transition from ground state to exited state. This absorbance is characteristic and depends on the nature of the electron present. The intensity of the electron depends on the concentration and path length as given by Lambert beer’s law. Lambert
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performance in the parent bismuth vanadate and was investigated by combining results obtained fromPowder X-ray diffraction (PXRD)‚ Differential Thermal analysis (DTA)‚ Thermogravimetric analysis (TGA)‚Scanning Electron Microscopy(SEM) and AC impedance spectroscopy. The PXRD results show that the composition x= 0.05 and 0.07 have monoclinic while for x= 0.10 orthorhombic symmetry. Composition x ≥ 0.15 presents a tetragonal symmetry. The thermal analysis revealed the existence of polymorph γ′ phase‚
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One other type of spectroscopy that would be particularly useful for determining the success or failure of my reaction would be infrared spectroscopy. IR spectroscopy measures the absorption of IR light by chemical bonds.1 The isoborneol would produce an IR absorption band around 1260 – 1000 cm-1 (due to the C-O bond) that would not be present
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Purpose The purpose of our lab was to reflux an isopentyl alcohol with carboxylic acid (acetic acid)‚ adding three drops of sulphuric acid acting as a catalyst to produce an ester (isopentyl acetate) and water. We verified our answers using infrared spectroscopy. Calculations for Percent Yield To find the percent yield we had to first find moles of our limiting reagent. 1) Weight of 5mL vial + cap
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why you identified each unknown as you did. Unknown 1 was Sodium and Unknown 2 was Potassium. I compared and contrasted each of the flame colors. Then‚ I observed that the elements and flame colors were the same as I initially saw. Part Two (Spectroscopy): 1. Create and complete a data table for Part Two of the lab. It should include the name of the element‚ the colors‚ and the wavelength values of the observed lines. | Hydrogen | Helium | Sodium | Neon | Mercury | Star | 1 | purple‚ 410nm
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HS1103- Engineering chemistry - I KINGS COLLEGE OF ENGINEERING Department of Science and Humanities Sub. Code: HS1103 Sem/Year: I / I Sub. Name: Engg.Chemistry-I UNIT – I – WATER TREATMENT PROCESS: PART – A ( 2 Marks) 1. Define hardness of water. 2. Distinguish between carbonate hardness and noncarbonate hardness. 3. Draw the structure of EDTA. What happens when EDTA is added to hard water? 4. Define alkalinity. 5. Why is water softened before using in boiler? 6. What is meant
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Determining the Concentration of an Unknown Protein Solution with the use of the Bradford Method Paul Alcala‚ Andrea Basa‚ Melissa Caagbay‚ Frances Cayomba Department of Chemistry‚ University of Santo Tomas‚ Manila‚ Philippines Abstract The Bradford method used to determine the protein content of a certain solution (Menguito‚ 2010) and involves the acidic Coomassie Brilliant Blue G-250 as a coloring reagent. [1] The dye is originally pinkish-brown in color when it is in its acidic state
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be adjusted by com-pounding. However‚ in- or online monitoring of the dispersion quality achieved in such compounding processes is a challenging task. Here‚ THz technology can provide a valuable contribution. KEYWORDS: - THz technology‚ THz spectroscopy‚ THz sciences. I. INTRODUCTION The term ‘T-rays’ was coined in the early 1990’s by Bell Labs to describe the spectrum in the Terahertz range (1 THz = 1012). [1] The terahertz region of the spectrum lies on the border of where electronics and
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