2-diphenyl-1‚2- ethanediol Discussion and Conclusion One can ascertain from the H NMR the stereoselectivity taking place in the reaction. Since there is not coupling of the Hc’s on product B‚ one can assume that they are in a similar environment‚ thus deducing that they are on the same side‚ forming a meso molecule. The doublet of doublet formed by coupling of the methyl groups shows that they are in different environments too‚ strongly implying that the phenyl groups are likely both on one side‚ supporting
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carboxylic acid‚ a salt of the organic acid and base is obtained. To overcome this‚ the carboxylic acid first needs to be "activated". This is usually done by converting the acid into a more reactive derivative (i.e. anhydride‚ acid halide) or by using a coupling agent. In some cases‚ high temperatures (>200 °C) can overcome salt formation by driving off water‚ without the need for "activation" of the carboxyl group. The downside to this simple reation is that the compounds may decompose at these elevated
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Metallic Cable Transmission Media Introduction Transmission media -It is included in the lowest layer of the OSI protocol hierarchy – the physical layer. -Transmission medium is simply the path between a transmitter and a receiver in a communications system. Guided Transmission media -some form of conductor that provide conduit in which signals are contained -the conductor directs the signal examples: copper wire‚ optical fiber Unguided Transmission media -wireless systems – without
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2003‚ the Cameron situation returned to normal‚ although there was a need to invest in a new plant to separate the line of production of flexible couplings. As Cameron was not financially prepared to make that commitment‚ the options were either to wait a year to generate more profits and financial stability‚ or license production of the flexible coupling. In the spring of 2004‚ Alex signed a five-year agreement with licensing Supplies Ltd. McTaggart. McTaggart had to pay $ 100‚000 in fees in advance
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WIRELESS POWER TRANSMISSION TO SENSORS USING MOBILE CARRIER HOSTS NAVIN SRIVASTAVA1‚ ARUSH SAXENA2 & CHETALI TYAGI3 1‚2&3 Dept. of Electronics Engineering‚ Bharati Vidyapeeth Deemed University‚ Pune‚ India Abstract- Wireless Sensor Networks are equipped with batteries with limited charge‚ and are often deployed in conditions that make their retrieval and replacement infeasible. Wireless Sensors‚ especially used for surveillance at the warfront in defense along with combat equipment and
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Synesthesia is a neurological condition in which at least two senses are intertwined. Normally‚ a sensory input is perceived and handled by one modality of the brain. In synesthesia‚ it was presumed that a sensory input in one modality directly elicits an additional sensory activation in another sensory modality. The original perceived sensation is called the inducer and the additional perception is called the concurrent. So‚ for example‚ someone with synesthesia may see a certain letter of the
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pipes or tubes in which fluids enter. It consists of two streams one for hot water and the other for cold water. The heat exchanger also consists of a control valve which is used to regulate the volume and mass. It also consists of cooling water couplings which are used to switch the cooling water direction from counter current to concurrent and vice versa. Introduction A heat exchanger is used in many different applications in a wide range of fields. The importance of a heat exchanger is to transfer
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replaced 6 hours post-transfection and cell samples were analyzed 24 hours post-transfection after treatment with 1 mg/mL trypsin (Gibco) for 15 minutes on a FACS¬Canto system (Becton Dickinson) using a 15 mW air-cooled argon ion laser at 488 nm excitation. Fluorescence emission was measured with a D detector (530/30 nm band pass
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harmful. Glutamate is both essential to us and highly toxic at the same time. Too much glutamate can lead to over excitation of the receiving nerve cell‚ but the receptor of glutamate on the receiving nerve cell can be oversensitive‚ so less glutamate molecules is necessary to excite that cell. Either way any cell activated by glutamate causes over excitement‚ and this over excitation can lead to cell damage and/or death. Drugs that can effect a person’s Glutamate levels are Ketamine‚ Phencyclidine
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found in the literature. These problems have become one of the major concern‚ especially‚ with the use of power electronics devices which are sensitive to the variation of power supply. Among these problems Voltage Sag & Swell are identified as major concern to the electrical consumers. Voltage Sag is one of the most occurring power quality problems that cause severe problems and losses to industry. With the power systems restructuring and shifting trend towards distributed and dispersed generation
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