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Showing 1 to 15 of 44 results Save | Export
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Butterfield, Anthony E.; Young, Colin C. – Chemical Engineering Education, 2012
We present a simple, effective, and inexpensive spectrophotometer design that may be used in a stand-alone teaching module, and to enhance various unit operations experiments. The spectrophotometers described performed as well as a commercial option at estimating cell concentration in a bioreactor and tracking a first-order reaction. Such devices…
Descriptors: Outreach Programs, Demonstrations (Educational), Science Activities, Chemical Engineering
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King, Daniel; Fernandez, Jorge; Nalliah, Ruth – Journal of Chemical Education, 2012
Because of the rapidly changing nature of chemical instrumentation, students must be trained in how to learn and understand new instruments. Toward this end, students are asked to create small instrument manuals, or instrument profiles, for the major pieces of equipment studied during an instrumental analysis course. This writing-intensive process…
Descriptors: Chemistry, College Science, Undergraduate Study, Instrumentation
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Bard, Allen J. – Journal of Chemical Education, 2007
The drooping mercury electrode (DME) was previously used to carry out electrochemical experiments but invention of polarography technique changed this. Voltammetry with DME was given the term polarography and are used in measurement of current as a function of potential at small electrodes.
Descriptors: Chemistry, Science History, Science Equipment, Laboratory Equipment
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Adar, Fran; Delhaye, Michel; DaSilva, Edouard – Journal of Chemical Education, 2007
The evolution of Raman instrumentation from the time of the initial report of the phenomenon in 1928 to 2006 is discussed. The first instruments were prism-based spectrographs using lenses for collimation and focusing and the 21st century instruments are also spectrographs, but they use CCD cameras. The Lippmann filter technology that appears to…
Descriptors: Instrumentation, Light, Laboratory Equipment, Photography
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Pintao, Carlos A. F.; de Souza Filho, Moacir P. – European Journal of Physics, 2007
This paper proposes a different experimental setup compared with the traditional ones, in order to determine the acceleration of gravity, which is carried out by using a fluid at a constant rotation. A computerized rotational system--by using a data acquisition system with specific software, a power amplifier and a rotary motion sensor--is…
Descriptors: Mechanics (Physics), Motion, Computer Software, Scientific Concepts
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Hale, Penny S.; Maddox, Leone M.; Shapter, Joe G. – Journal of Chemical Education, 2005
The difference between solution and surface properties such as pK(sub a) is illustrated enabling students to understand the differences between nanoscale and macroscopic systems. Details regarding the usage of electrochemical instrumentation, such as a potentiostat, and of the technique such as cyclic voltammetry are given.
Descriptors: Chemistry, Instrumentation, Measurement Techniques, Science Instruction
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Economou, A.; Papargyris, D.; Stratis, J. – Journal of Chemical Education, 2004
The development of an FI analyzer for chemiluminescence detection using a low-cost photoiodide is presented. The experiment clearly demonstrates in a single interdisciplinary project the way in which different aspects in chemical instrumentation fit together to produce a working analytical system.
Descriptors: Laboratory Equipment, Instrumentation, Chemistry, Automation
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Terry, John – Journal of Biological Education, 1987
Discusses the feasibility of using fermenters in secondary school laboratories. Includes discussions of equipment, safety, and computer interfacing. Describes how a simple fermenter could be used to simulate large-scale processes. Concludes that, although teachers and technicians will require additional training, the prospects for biotechnology in…
Descriptors: Biochemistry, Biology, Computer Uses in Education, Computers
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Paselk, Richard A. – Journal of Chemical Education, 1982
A technician auto analyzer (consisting of six modules: sampler, multichannel peristaltic pump, dialyser, heating/incubation bath, colorimeter, and recorder) was modified by using key modules and substituting standard equipment for others; spectronic 20 with homemade flow cell for colorimeter module. Descriptions and diagrams of the apparatus are…
Descriptors: Chemical Analysis, Chemistry, College Science, Higher Education
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Rockwell, Dean M.; Hansen, Tony – Journal of Chemical Education, 1994
Describes two variations of an air sampler and analyzer that are inexpensive to construct, easy to operate, and designed to be used in an educational program. Variations use vacuum cleaners and aquarium pumps, and white facial tissues serve as filters. Samples of air pollution obtained by this method may be used from early grade school to advanced…
Descriptors: Air Pollution, Chemistry, Educational Innovation, Elementary Secondary Education
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Poole, Colin F.; Poole, Salwa K. – Analytical Chemistry, 1989
Some of the important modern developments of thin-layer chromatography are introduced. Discussed are the theory and instrumentation of thin-layer chromatography including multidimensional and multimodal techniques. Lists 53 references. (CW)
Descriptors: Chemical Analysis, Chemistry, Chromatography, College Science
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Elin, Ronald J. – Science, 1980
Describes recent developments in instrumentation for clinical chemistry in the areas of general chemistry, immunoassays, urinalysis, electrophoresis, chromatography, and trace metal analyses. (CS)
Descriptors: Chemistry, Clinical Diagnosis, Instrumentation, Laboratories
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Young, J. P.; And Others – Analytical Chemistry, 1989
Discussed is an analytical technique that uses photons from lasers to resonantly excite an electron from some initial state of a gaseous atom through various excited states of the atom or molecule. Described are the apparatus, some analytical applications, and the precision and accuracy of the technique. Lists 26 references. (CW)
Descriptors: Chemical Analysis, Chemistry, College Science, Higher Education
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Warner, Steven A. – Analytical Chemistry, 1990
Presented are system concepts with examples of various vendor approaches for implementing laboratory local area networks. (CW)
Descriptors: Chemistry, College Science, Computer Assisted Instruction, Computer Networks
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Webster, E. – Physics Education, 1986
Discusses the use of an external analog-digital converter to use a computer as a storage oscilloscope. Provides program listings for use as a unipolar or bipolar voltmeter and storage oscilloscope. Schematics and component list are included. (JM)
Descriptors: Computers, Data Collection, Data Processing, Electronic Equipment
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