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Dugdale, Pam – School Science Review, 2014
Electricity from osmotic pressure might seem a far-fetched idea but this article describes a prototype in Norway where the osmotic pressure generated between salt and fresh water drives a turbine. This idea was applied in a student investigation, where they were tasked with researching which alternative materials could be used for the…
Descriptors: Foreign Countries, Power Technology, Energy Education, Energy
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Marvel, Stephen C.; Kepler, Megan V. – American Biology Teacher, 2009
It is important for students to be exposed to the concept of osmotic pressure. Understanding this concept lays the foundation for deeper discussions that lead to more theoretical aspects of water movement associated with the concepts of free energy, water potential, osmotic potential, pressure potential, and osmotic adjustment. The concept of…
Descriptors: Laboratory Procedures, Physics, Biology, College Students
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Seu, Kalani J. – Journal of Chemical Education, 2015
A fluorescence demonstration is described that incorporates several fundamental aspects of an introductory biochemistry course. A variation of a known leakage assay is utilized to prepare vesicles containing a quenched fluorophore. The vesicles are exposed to several osmotic environments ranging from isotonic to hypotonic. The degree of vesicle…
Descriptors: Undergraduate Students, Biochemistry, Introductory Courses, Demonstrations (Educational)
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Özalemdar, Lütfiye – Journal of Turkish Science Education, 2019
The purpose of this study is to disclose the units and topics including the concept of water within 9th, 10th, 11th and 12th grades' biology textbooks that were chosen by the Ministry of National Education (MoNE) Head Council of Education and Morality (HCEM), and provide an overview of the whole content that mentions the concept of water. This…
Descriptors: Biology, Science Instruction, Secondary School Science, Water
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Spinelli Barria, Michele; Morales, Cecilia; Merino, Cristian; Quiroz, Waldo – Chemistry Education Research and Practice, 2016
In this work, we developed an ontological tool, based on the scientific realism of Mario Bunge, for the analysis of the presentation of natural processes in science textbooks. This tool was applied to analyze the presentation of the concept of osmosis in 16 chemistry and biology books at different educational levels. The results showed that more…
Descriptors: Scientific Concepts, Concept Teaching, Scientific Principles, Biochemistry
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Kowles, Richard V. – Bioscene: Journal of College Biology Teaching, 2010
Cell water relationships are important topics to be included in cell biology courses. Differences exist in the control of water relationships in plant cells relative to control in animal cells. One important reason for these differences is that turgor pressure is a consideration in plant cells. Diffusion and osmosis are the underlying factors…
Descriptors: Thermodynamics, Science Activities, Science Laboratories, Cytology
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Sung, Shannon; Shen, Ji; Stanger-Hall, Kathrin F.; Wiegert, Craig; Li, Wan-l; Brown, Scott; Robertson, Tom – Journal of College Science Teaching, 2015
Despite the increasing interests and practices in interdisciplinary science education, little research has been documented to develop effective assessments targeting students' interdisciplinary learning. In response to this gap, a team of scientists and educators developed an interdisciplinary assessment instrument targeting osmosis, which was…
Descriptors: Science Education, Interdisciplinary Approach, Student Evaluation, Science Process Skills
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De Berg, Kevin C. – Science & Education, 2006
Osmotic pressure proves to be a useful topic for illustrating the disputes brought to bear on the chemistry profession when mathematics was introduced into its discipline. Some chemists of the late 19th century thought that the introduction of mathematics would destroy that "chemical feeling" or "experience" so necessary to the practice of…
Descriptors: Thermodynamics, Kinetics, Chemistry, Teaching Methods
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Feher, Joseph J.; Ford, George D. – Advances in Physiology Education, 1995
Describes a laboratory exercise containing a practical series of experiments that novice students can perform within two hours. The exercise provides a confirmation of van't Hoff's law while placing more emphasis on osmotic flow than pressure. Students can determine parameters such as the reflection coefficient which stress the interaction of both…
Descriptors: Chemistry, Demonstrations (Science), Higher Education, Laboratory Equipment
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Chang, Raymond; Kaplan, Lawrence J. – Journal of Chemical Education, 1977
Discusses the Donnan Effect by considering three possible cases of membrane equilibrium. (MLH)
Descriptors: Chemical Equilibrium, Chemistry, College Science, Higher Education
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Lennox, John E. – Journal of College Science Teaching, 1984
An easily constructed apparatus that models the effect of penicillin on the structure of bacterial cells is described. Background information and procedures for using the apparatus during a classroom demonstration are included. (JN)
Descriptors: College Science, Demonstrations (Educational), Higher Education, Microbiology
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Bradbeer, Philip A.; And Others – Journal of Biological Education, 1976
Recommends use by teachers of new terminology regarding plant water relations. Includes definitions and Greek symbols for the following terms: water potential, water potential of cell, osmotic potential, matric potential, and pressure potential. (CS)
Descriptors: Biology, Botany, Instruction, Science Education
Friedler, Y.; And Others – 1985
This study identified students' conceptual difficulties in understanding concepts and processes associated with cell water relationships (osmosis), determined possible reasons for these difficulties, and pilot-tested instruments and research strategies for a large scale comprehensive study. Research strategies used included content analysis of…
Descriptors: Biology, Concept Formation, High Schools, Science Education
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Hobbie, Russell K. – American Journal of Physics, 1974
Discusses the use of an ideal gas model to explain osmotic equilibrium and nonequilibrium flows through an ideal semipermeable membrane. Included are a justification of the relationship between an ideal gas and a dilute solution, a review of the irreversible thermodynamic flow, and some sample applications to physiology. (CC)
Descriptors: College Science, Instruction, Instructional Materials, Physics
Northwest Regional Educational Lab., Portland, OR. – 1985
This document consists of 68 microcomputer software package evaluations prepared by MicroSIFT (Microcomputer Software and Information for Teachers) Clearinghouse at the Northwest Regional Education Laboratory. There are 26 packages in set 13 and 42 in set 14. Each software review lists producer, time and place of evaluation, cost, ability level,…
Descriptors: Computer Assisted Instruction, Course Evaluation, Courseware, Educational Games
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