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Showing 76 to 90 of 178 results Save | Export
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Cameron-Holford, Richard; Ratneswaren, Tarini; Hughes, D. E. Peter – Journal of Chemical Education, 2010
Kinetic study on the hydrolysis of diphenylbromomethane does not provide clear-cut evidence for the mechanism of the reaction. The reduction in the rate of the reaction by added bromide ions suggested that the reaction took place by a S[subscript N]1 mechanism. A more detailed study of this common-ion effect, using conductivity to measure the rate…
Descriptors: Science Instruction, Scientific Concepts, College Science, Molecular Structure
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Peckenham, John M.; Thornton, Teresa; Peckenham, Phoebe – Journal of Science Education and Technology, 2012
As part of a research project to evaluate the effects of sand and gravel mining on water quality, students were trained to analyze their own drinking water for simple quality indicators. Indicators analyzed were pH, conductivity, hardness, nitrate, chloride, and dissolved iron. Approximately 523 analyses were completed by students between 2006 and…
Descriptors: Water Quality, Water, Quality Control, Laboratories
Rieben, James C., Jr. – ProQuest LLC, 2010
This study focuses on the effects of relevance and lab design on student learning within the chemistry laboratory environment. A general chemistry conductivity of solutions experiment and an upper level organic chemistry cellulose regeneration experiment were employed. In the conductivity experiment, the two main variables studied were the effect…
Descriptors: Organic Chemistry, Laboratories, Education Work Relationship, Investigations
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Ribeiro, Isabel A. C.; Faustino, Ce´lia M. C.; Guedes, Rita C.; Alfaia, Anto´nio J. I.; Ribeiro, Maria H. L. – Journal of Chemical Education, 2015
The transport of molecules across biological membranes are critical for most cellular processes. Membrane permeability is also a key determinant for drug absorption, distribution, and elimination. Diffusion, that is, the migration of matter down a concentration gradient, is a simple mechanism by which both endogenous and drug molecules can enter…
Descriptors: Chemistry, Physics, Science Experiments, Health Sciences
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Jacobberger, Robert M.; Machhi, Rushad; Wroblewski, Jennifer; Taylor, Ben; Gillian-Daniel, Anne Lynn; Arnold, Michael S. – Journal of Chemical Education, 2015
Graphene's unique combination of exceptional mechanical, electronic, and thermal properties makes this material a promising candidate to enable next-generation technologies in a wide range of fields, including electronics, energy, and medicine. However, educational activities involving graphene have been limited due to the high expense and…
Descriptors: Science Instruction, Secondary School Science, High Schools, College Science
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Thompson, Frank; Elamari, Matouk – Physics Education, 2008
Measurement of the level of a liquid is needed in many hydrodynamic situations. In the present article, this has been achieved with a conductivity sensor for the specific case of water levels. The use of this system is illustrated by the automation of a gasometer in which the gas is collected in an inverted measuring cylinder resting in a water…
Descriptors: Physics, Science Experiments, Science Process Skills, Measurement
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Ottonello, P.; Valbusa, U. – American Journal of Physics, 1980
Describes an experiment to measure the thermal conductivity of some gases in an undergraduate physics laboratory using a hot wire method in the pressure range ten to one torr. (HM)
Descriptors: College Science, Higher Education, Laboratory Procedures, Matter
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Di Lieto, Alberto; Giuliano, Alessia; Maccarrone, Francesco; Paffuti, Giampiero – European Journal of Physics, 2012
A simple experiment, suitable for performing in an undergraduate physics laboratory, illustrates electromagnetic induction through the water entering into a cylindrical rubber tube by detecting the voltage developed across the tube in the direction transverse both to the flow velocity and to the magnetic field. The apparatus is a very simple…
Descriptors: Physics, Motion, Phenomenology, Energy
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Musavi, Mohamad; Friess, Wilhelm A.; James, Cary; Isherwood, Jennifer C. – International Journal of STEM Education, 2018
Background: The University of Maine Stormwater Management and Research Team (SMART) program began in 2014 with the goal of creating a diverse science-technology-engineering-math (STEM) pathway with community water research. The program engages female and underrepresented minority high school students in locally relevant STEM research. It focuses…
Descriptors: STEM Education, Water, High School Students, Females
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Lindenfeld, Peter – Physics Teacher, 1980
Asks questions relating electrical resistivity and observed size effects. Electron mean free path and thermodynamic fluctuations are discussed. Experiments with granular aluminum are outlined and described which allow the study of size effects, as well as the coupling and the transport processes between them. (CS)
Descriptors: College Science, Electricity, Higher Education, Physics
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Rettich, Timothy R.; Battino, Rubin – Journal of Chemical Education, 1989
Presents a low cost system with easily replaced electrodes for use in general chemistry. Notes the accuracy and wide applicability permit easy use in physical or quantitative chemistry experiments. Provides schematic, theory, and helpful suggestions. (MVL)
Descriptors: Chemical Analysis, Chemistry, College Science, Inorganic Chemistry
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Dasheiff, R. M.; Risk, W. S. – American Journal of Physics, 1972
Descriptors: College Science, Electricity, Instructional Materials, Laboratory Experiments
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Teichert, Melonie A.; Tien, Lydia T.; Anthony, Seth; Rickey, Dawn – International Journal of Science Education, 2008
In the studies reported here, we investigate the effects of context on students' molecular-level ideas regarding aqueous solutions. During one-on-one interviews, 19 general chemistry students recruited from a two-year community college and a research university in the United States were asked to describe their molecular-level ideas about various…
Descriptors: Research Universities, Chemistry, Science Instruction, College Science
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Acedo, Luis; Tung, Michael M. – European Journal of Physics, 2012
The gravitational redshift forms the central part of the majority of the classical tests for the general theory of relativity. It could be successfully checked even in laboratory experiments on the earth's surface. The standard derivation of this effect is based on the distortion of the local structure of spacetime induced by large masses. The…
Descriptors: Scientific Concepts, Laboratory Experiments, Science Instruction, Magnets
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Mulvihill, Charlotte – Science Teacher, 2007
At Oklahoma City Community College, they have developed gel electrophoresis activities that support active learning of many scientific concepts, including: pH, electrolysis, oxidation reduction, electrical currents, potentials, conductivity, molarity, gel electrophoresis, DNA and protein separation, and DNA fingerprinting. This article presents…
Descriptors: Scientific Concepts, Active Learning, Genetics, College Science
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