While experimenting with spectroscopy in his laboratory Crookes discovered a lime green band in the spectrum of selenium‚ a band that belongs to no known element at that time. After a few years he succeeded in isolating the element‚ which he named thallium. But at the same time a French
Premium Family School Teacher
A ground breaking new tool used to study the heavens was introduced in the 17th century. This tool was known as the telescope. It revealed the cosmos in a different way than our naked eye could ever perceive. The telescope opened doors to countless stars‚ nebulae‚ galaxies‚ and a slew of never before seen wonders. With its creation came limitations and caused the need to improve and upgrade the methods in which the telescope functioned and find new ways of viewing the heavens.There are three main
Premium Optics Astronomy Telescope
Letter pubs.acs.org/ac Disposable Immunochips for the Detection of Legionella pneumophila Using Electrochemical Impedance Spectroscopy Nan Li‚† Arujun Brahmendra‚‡ Anthony J. Veloso‚† Akriti Prashar‚‡ Xin R. Cheng‚† Vinci W. S. Hung‚† Cyril Guyard‚§‚⊥ Mauricio Terebiznik‚‡ and Kagan Kerman*‚†‚‡ † Department of Physical and Environmental Sciences‚ ‡Department of Biological Sciences‚ University of Toronto Scarborough‚ 1265 Military Trail‚ Toronto‚ ON‚ M1C 1A4‚ Canada § Ontario Agency for Health
Premium
The Michael addition is a reaction named after Arthur Michael. Discovered in 1887‚ this is a carbon-carbon bond making reaction. The result of the Michael addition is a 1‚4 addition of a nucleophile to an alpha‚ beta-unsaturated carbonyl carbon compound. A 1‚4 addition is also commonly referred to as a conjugated addition. Another result of this reaction is a 1‚2 addition of a nucleophile. Some of the common attacking nucleophiles used in this reaction are enolates. Enolates‚ a negatively charged
Premium Oxygen Chemistry Hydrogen
complex -Ox. The missing part O α + β could be transformed into another compound or then the ES-product diol to be converted in turn into ES-ether‚ ES-hydroxy-ether or other product. This could be verified by a UHPLC analysis coupled with mass spectroscopy (UHPLC-MS). It would be interesting to determine the SE of the adsorption kinetics of α + β and ES-diol by performing sorption isotherms on ferrihydrite and the reactor walls. We could do an analysis on the particles in the medium after bio-reduction
Premium Oxygen Chemistry Carbon dioxide
remove the magnesium sulfate by vacuum filtration and remove the pentane from the filtrate by evaporation on a water bath in the hood. The percent recovery from cloves will be determined and the product will be analyzed by transmission infrared spectroscopy (IR). Oil of cloves‚ which consists almost entirely of eugenol and its acetate‚ is used in perfumeries‚ flavorings‚ essential oils and in medicine (local antiseptic and analgesic). Reaction: See flow chart attached Data and observation
Premium Distillation Essential oil Infrared
Sun’s helium composition. This depletion may be a result of precipitation of these elements into the interior of the planet.[21] Abundances of heavier inert gases in Jupiter’s atmosphere are about two to three times that of the Sun. Based on spectroscopy‚ Saturn is thought to be similar in composition to Jupiter‚ but the other gas giants Uranus
Premium Hydrogen Planet Jupiter
Carried out the microscale synthesis of isopentyl acetate by direct esterification of acetic acid and isopentyl alcohol. This was an acid catalyzed Fischer esterification. Both extraction and distillation were employed to obtain a pure product. IR spectroscopy and gas chromatography were used to determine purity of the final product. Reagents: * Compound: | * MW (g/mol): | * MP (°C): | * BP (°C): | * Density (g/mL): | * Properties/ Safety: | * Isopentyl AlcoholC5H12O | *
Premium Acetic acid Ester Carboxylic acid
Chapter II Light and Matter The Inner Workings of the Cosmos 2.4 The Distribution of Radiation All microscopic objects – fires‚ cubes‚ people‚ and stars – emit radiation at all times. They radiate because the microscopic charged particles in them are in constant random motion‚ and whenever charges change their state of motion‚ electromagnetic radiation is emitted. The temperature of an object is a direct measure of the amount of microscopic motion within it. The hotter the object
Free Electromagnetic radiation Light Electron
fourth edition ORGANIC CHEMISTRY Francis A. Carey University of Virginia Burr Ridge‚ IL Dubuque‚ IA Madison‚ WI New York San Francisco St. Louis Bangkok Bogotá Caracas Lisbon London Madrid Mexico City Milan New Delhi Seoul Singapore Sydney Taipei Toronto | v v Boston | e-Text Main Menu | Textbook Table of Contents | Study Guide Table of Contents McGraw-Hill Higher Education A Division of The McGraw-Hill Companies ORGANIC CHEMISTRY‚ FOURTH EDITION
Premium Chemistry Organic chemistry Organic reaction