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Direct linkGreczylo, Tomasz; Mazur, Piotr; Debowska, Ewa; Wieczorek, Piotr – European Journal of Physics, 2010
This paper presents an experiment in which students determine the mass sensitivity of three crystal quartz resonators, designed to be carried out in "Physics Laboratory II" at the Institute of Experimental Physics, University of Wroclaw. The authors discuss the process of setting up the experiment and the results of the measurements.…
Descriptors: Physics, Science Laboratories, Science Instruction, College Science
Wieder, Milton J.; Barrows, Russell – Journal of Chemical Education, 2008
Treatment of phenylacetic acid with 90% HNO[subscript 3] yields a product, I, whose observed melting point is 175-179 degrees C and whose equivalent weight is approximately 226 grams. Treatment of phenylacetic acid with 70% HNO[subscript 3] yields a product, II, whose observed melting point is 106-111 degrees C and whose equivalent weight is…
Descriptors: Organic Chemistry, Science Laboratories, Heat, Spectroscopy
Nash, John J.; Leininger, Marnie A.; Keyes, Kurt – Journal of Chemical Education, 2008
The aryl sulfonate ester, menthyl N-acetylsulfanilate, is synthesized from N-acetylsulfanilyl chloride and menthol in pyridine, then pyrolyzed (thermally decomposed) at reduced pressure. The volatile (elimination) products of the reaction are analyzed using gas chromatography, and the resulting product distribution is used to determine whether the…
Descriptors: Organic Chemistry, Scientific Principles, Science Instruction, Thermodynamics
Vachutka, J.; Grec, P.; Mornstein, V.; Caruana, C. J. – European Journal of Physics, 2008
The heating of tissues by diagnostic ultrasound can pose a significant hazard particularly in the imaging of the unborn child. The demonstration of the temperature field in tissue is therefore an important objective in the teaching of biomedical physics to healthcare professionals. The temperature field in a soft tissue model was made visible and…
Descriptors: Physics, Biophysics, Biomedicine, Climate
Aktoudianakis, Evangelos; Chan, Elton; Edward, Amanda R.; Jarosz, Isabel; Lee, Vicki; Mui, Leo; Thatipamala, Sonya S.; Dicks, Andrew P. – Journal of Chemical Education, 2008
This article describes the rapid, green synthesis of a biaryl compound (4-phenylphenol) via a Pd(0)-catalyzed Suzuki cross-coupling reaction in water. Mild reaction conditions and operational simplicity makes this experiment especially amenable to both mid- and upper-level undergraduates. The methodology exposes students to purely aqueous…
Descriptors: Science Instruction, Science Experiments, Scientific Principles, College Science
Pour, Sanaz Barar; Norca, Gregory Benoit; Fradette, Louis; Legros, Robert; Tanguy, Philippe A. – Chemical Engineering Education, 2007
Solid-liquid and liquid-liquid mixing experiments have been developed to provide students with a practical experience on suspension and emulsification processes. The laboratory focuses on the characterization of the process efficiency, specifically the influence of the main operating parameters and the effect of the impeller type. (Contains 2…
Descriptors: Chemical Engineering, Science Laboratories, Science Instruction, Science Experiments
