Modern Learning Aids (Firm)
Most widely held works by Modern Learning Aids (Firm)
Shapes and polarities of molecules ( Visual )
1 edition published in 1989 in English and held by 54 libraries worldwide
A knowledge of the shapes and polarity of molecules is a powerful tool for interpreting the chemical properties of substances.
Electrochemical cells ( Visual )
1 edition published in 1964 in English and held by 21 libraries worldwide
Uses time-lapse photography in describing the construction and operation of an electrochemical coil, the changes at the electrodes, the cell processes, the nature of the electrode reactions, the motion of the electron and ion currents, and the relationship between concentrations and cell voltage. Uses close-ups of a hydrogen electrode to illustrate the operation and to introduce a discussion of the table of Eo values.
Area under a curve ( Visual )
2 editions published in 1966 in English and held by 19 libraries worldwide
Discusses areas under curves, with emphasis on the graphs of continuous and monotone functions. Includes a short sequence on uniform continuity.
Flatworms planarians, flukes, tapeworms ( Visual )
2 editions published in 1976 in English and held by 17 libraries worldwide
Examines planarians, their movements, food detection, and regeneration. Shows parasitic flukes in the organs of a frog, a living scolex. and several proglottids.
John Von Neumann a documentary ( Visual )
1 edition published in 1998 in English and held by 17 libraries worldwide
Uses rare photographs and films to present a biography of the mathematician John Von Neumann. Includes personal recollections of friends and colleagues as well as detailed descriptions and discussions of his contributions in various fields of science.
Acid-base indicators ( Visual )
1 edition published in 1962 in English and held by 17 libraries worldwide
Uses the proton donor-acceptor theory to interpret the experimental behavior of acid-base indicators. Experiments and animation show the effects on indicators of changing acidity; determines equilibrium constants of four indicators, and arranges the indicators in order of decreasing acid strength. Shows the competition among bases for protons by mixing the indicators and illustrates that each changes color at different total acidity.
Chemical bonding ( Visual )
1 edition published in 1963 in English and held by 17 libraries worldwide
Explains chemical bonding in terms of the electric interactions that cause the bonding in the hydrogen molecule. Shows the release of energy when H atoms combine to form H2 on a platinum surface, explaining that this energy change is related to the simultaneous attraction of electrons by two or more nuclei, opposed by Electron-electron and nucleus-nucleus repulsions. Uses animation to portray the quantum mechanical view of electron distribution and contrasts the bonding interaction between two hydrogen atoms to the very weak, non-bonding interaction between two helium atoms.
Crystals and their structures ( Visual )
2 editions published between 1963 and 1999 in English and held by 15 libraries worldwide
Uses single crystals of sodium chloride and quartz to show typical properties of crystals. Compares cleavage, melting point, and models of crystals with those of glasses. Illustrates the use of X-rays to determine the structure of crystals, showing the diffraction of X-rays by a crystal of sodium chloride on a fluorescent screen. Uses the diffraction of water waves in a ripple tank to show how the Bragg equation allows the determination of interatomic distances in crystals.
The Echinoderms starfishes. brittle stars, sea urchins, sea cucumbers ( Visual )
in English and held by 14 libraries worldwide
Examines 16 echinoderm species representing four major classes, showing how different modifications of form and behavior allow these creatures to fit a wide variety of ecological niches in the marine environment.
What is area ( Visual )
2 editions published in 1966 in English and held by 13 libraries worldwide
Defines area in terms of caculus.
Mechanism of an organic reaction ( Visual )
1 edition published in 1963 in English and held by 13 libraries worldwide
Studies the hydrolysis of an organic ester to show that the discovery of a reaction mechanism includes a determination of the chemical equation, the structures of the reactants and the products, the fate of each atom of the reactants, and the structures of the intermediate molecules. Discusses the concepts of bond polarity and the effect of varying structures of one reactant. Explains that the use of 013 and its detection on the mass spectrometer provide critical experimental data for the particular mechanism of ester hydrolysis.
The Hydrogen atom, as viewed by quantum mechanics ( Visual )
2 editions published in 1963 in English and held by 12 libraries worldwide
Provides the model for the electron probability distribution in the hydrogen atom by quantum mechanics. Demonstrates by analogies the probability distribution of the electron and uses animation to show the outstanding features of the hydrogen atom.
Gases and how they combine ( Visual )
1 edition published in 1962 in English and held by 12 libraries worldwide
Shows some properties that distinguish gases. The volume of ammonia and hydrogen chloride that combine are measured quantitatively, and simple integer volume ratios are measured for the combinations of hydrogen and chlorine. Interprets these simple integer ratios in terms of Avogadro's hypothesis.
Courant in Gottingen and New York ( Visual )
1 edition published in 1998 in English and held by 11 libraries worldwide
Arthropods millipedes, centipedes, crustaceans, arachnid, insects ( Visual )
in English and held by 11 libraries worldwide
Examines the various classes of the phylum Arthropoda showing the various ecological life styles.
Paul Tillich ( Visual )
2 editions published between 1964 and 1990 in English and held by 10 libraries worldwide
Presents Paul Tillich, Protestant theologian and authority on religious philosophy, explaining his concept of ultimate concern, or concern about the meaning of one's life. Develops his distinction between faith and belief, and the significance of the difference for the church.
Mechanical energy and thermal energy ( Visual )
1 edition published in 1959 in English and held by 9 libraries worldwide
Shows several models to illustrate both the bulk motion and random motion of molecules. Shows their interconnection as the energy of bulk motion. Discusses thermal conduction and absolute temperature scale.
Mass of the electron ( Visual )
1 edition published in 1959 in English and held by 9 libraries worldwide
Eric Rogers uses a cathode ray tube encircled by a current-carrying loop of wire, to take measurements which enable him to calculate the mass of the electron. The calculations are brought out in detail, step-by-step.
Biochemistry and molecular structure ( Visual )
2 editions published between 1964 and 1986 in English and held by 8 libraries worldwide
Demonstrates the relationship of molecular structure to biological activity using sulfanilamide as an example. Explains that some compounds structurally similar to those in cell chromosomes may stop cancer cell growth. Uses time lapse microphotography to show how 5-fluorouracil acts on cancer cells.
Electric interactions in chemistry ( Visual )
1 edition published in 1962 in English and held by 8 libraries worldwide
Uses time-lapse photography and animation of the migration of positive and negative ions and their mutual precipitation in order to illustrate the chemical applications of the principles that opposite charges attract, like charges repel, and uncharged bodies have no electric interaction.
Area measurement Arthropoda Biography Calculus Calculus, Integral Cancer Chemical bonds Chemotherapy Christianity Courant, Richard,--1888-1972 Crustacea Crystallography Echinoderidae Echinodermata Electrochemistry Electrons Esters Force and energy Functions Gases Heat--Conduction Hydrogen Hydrolysis Indicators and test-papers Insects Ions--Migration and velocity Mathematicians Mathematics--Study and teaching Maxima and minima Mean value theorems (Calculus) Microbial ecology Microorganisms--Physiology Molecular structure Molecules Ophiuroidea Pharmaceutical chemistry Platyhelminthes Polarization (Electricity) Protista Religion--Philosophy Reproduction Sea cucumbers Sea urchins Starfishes Temperature Unicellular organisms United States Videocassettes Von Neumann, John,--1903-1957 Worms
Modern Talking Picture Service, Inc. Modern Learning Aids
Ward's Natural Science Establishment. Modern Learning Aids