92°C‚ the literature melting point of pure benzocaine. The crude product was then recrystallized to improve the purity of benzocaine and 57.4% was recovered. The new melting point range was measured at 89.1°C ± 0.3°C‚ which has a 3.15% error. The infrared spectrum of the recrystallized product was measured to further verify that the synthesized product was benzocaine. Introduction The discovery of benzocaine as a local anesthetic came out of necessity to find a replacement for other anesthetic compounds
Premium Cocaine Local anesthetic
Astronomy 1760-60 Fall 2010 Homework 2 Answers Short Answer/General Questions: These should have short answers of a few sentences. 1. Explain the difference between speed and velocity and why this is important in acceleration. Give an example where an object is accelerating‚ but their speed is constant. Speed: Change in position over time – distance over time Velocity: Change in position and direction over time – distance and direction over time Acceleration: Change in Velocity‚ so a change
Premium Classical mechanics General relativity Force
INTRODUCTION For years‚ infrared LED has been merely a system for piping light around corners and into the inaccessible places to allow the hidden to be lighted. But now‚ infrared LED has evolved into a system of significantly greater importance and use. Throughout the world‚ it is now being used to transmit voice‚ television and data signals as light waves. Its advantages as compared with conventional coaxial cable or twisted wire pairs are manifold. As a result‚ millions of dollars are being spent
Premium Integrated circuit
Astronomy flash cards Term Which of the following has your "address" in the correct order?A) you‚ Earth‚ solar system‚ Milky Way‚ Local Supercluster‚ Local GroupB) you‚ Earth‚ Local Group‚ Local Supercluster‚ solar system‚ Milky WayC) you‚ Earth‚ solar system‚ Milky Way‚ Local Group‚ Local SuperclusterD) you‚ Earth‚ solar system‚ Local Group‚ Local Supercluster‚ Milky WayE) you‚ Earth‚ solar system‚ Local Group‚ Milky Way‚ Local Supercluster | | Definition C) you‚ Earth‚ solar system‚ Milky
Premium Sun Solar System Earth
Alkene Synthesis from Alcohol: Preparation of Cyclohexene From Cyclohexanol 5/29/14 Abstract: A 42.89% yield cyclohexene was successfully synthesized from 10.0 mL cyclohexanol by unimolecular elimination (E1) through the dehydration of cyclohexanol and confirmed via a bromine test and the IR spectra. Introduction: Alkenes are hydrocarbons that have carbon–carbon double bonds and are one of the many functional groups in organic molecules. Alkenes are sp2 hybridized
Premium Alkene Alcohol Oxygen
NOVA “Earth From Space” 1. They describe at least three teleconnections in the film. The movie talks about sandstorms in the Sahara Desert transforming the rainforest across the globe. Also explained are the waterfalls under the sea in Antarctica‚ leading to a feeding frenzy in the ocean by the equator. Finally‚ they talked about streaming water off the coast of Africa causing a disastrous weather storm in the United States. This happens because all of the activity in the ocean‚ sun and atmosphere
Premium Earth Precipitation Water
Transmitters Light emitting diode (LED) in electronics a semiconductor device that emits infrared or visible light when charged with an electric current. Visible LEDs are used in many electronic devices as indicator lamps‚ in automobiles as rear-window and brake lights‚ and on billboards and signs as alphanumeric displays or even full-color posters. Infrared LEDs are employed in autofocus cameras and television remote controls and also as light sources in fiber-optic telecommunication systems.
Premium Laser Optical fiber Light
techniques involve computer control of motors that move a fraction of a wavelength Atmospheric “seeing” Atmospheric blurring: due to air movements Instruments for Telescopes • Cameras are sensitive to specific wavelengths: – UV‚ visible‚ or infrared wavebands • Different spectrographs for different purposes: – to measure Doppler shifts of galaxies – to study conditions in stars and nebulae – to watch stars’ velocities wobble very small amounts to detect planets around other stars CCD
Premium
of the most powerful scientific instruments ever invented. Within a few decades‚ the reflecting telescope was invented‚ which used mirrors. In the 20th century many new types of telescopes were invented‚ including radio telescopes in the 1930s and infrared telescopes in the 1960s. The word telescope now refers to a wide range of instruments detecting different regions of the electromagnetic spectrum‚ and in some cases other types of detectors. Reflecting telescope A reflecting telescope (also called
Premium Light Refracting telescope Lens
3. Therefore ‚ the ozone in the upper atmosphere may all absorb and most of the parts are short of the wavelength radiation. As well as the CO2 as well as H2O ‚ which is absorbed with the vapor from the water infrared radiation in the lower atmosphere. 4. The visible light and infrared energy warm Earth by reaching Earth’s surface as adsorbed. The heated way is of the surfaces radiate the heat back into the air where all the greenhouses of the gases absorb at least some heat. 5. The variations
Premium Water Atmosphere Earth