Cerenkov counting is a useful technique for assaying medium/high energy beta emitters in aqueous solutions. Advantages of the technique include: (1) simple sample preparation; (2) being able to handle large volume of aqueous solution for counting; and (3) absence of chemical quenching. Cerenkov counting is also less expensive than other methods.…

Suggesting that selected research activities be integrated into engineering technology programs to give students experiences in new technology, this article discusses a project incorporating teaching, research, and service. A photograph and description of the solar experiment unit resulting from the project are provided. The unit runs on air,…

Points out textbook errors or discrepancies which are confusing or unclear in describing the photon. Cites specific texts and the particular point of confusion in each one. (JM)

Presents an undergraduate laboratory experiment in which a solar collector is used to heat water for domestic use. The working fluid is moved by natural convection so no pumps are required. Experimental apparatus is simple in design and operation so that data can be collected quickly and easily. (Author/JN)

Discusses problems associated with the use of nuclear power as a source of energy. Sources of exposure to radiation, the effects of exposure to radiation on children's health, and safe alternatives to nuclear power that can be taught to children are among the topics addressed. (Author/RH)

Selected infrared laser chemistry topics are discussed including carbon dioxide lasers, infrared quanta and molecules, laser-induced chemistry, structural isomerization (laser purification, sensitized reactions, and dielectric breakdown), and fundamental principles of laser isotope separation, focusing on uranium isotope separation. (JN)

Discusses some aspects of the radiation chemistry of gases, focusing on the ion-molecule and charge neutralization reactions which set study of the gas phase apart. Uses three examples that illustrate radiolysis, describing the radiolysis of (1) oxygen, (2) carbon dioxide, and (3) acetylene. (CS)

Reviews recent advances in radiation chemistry concerning the effect of high-energy radiation on organic liquids. Discusses the general nature of excited and ionized states, pathways for decay, the effect of environmental perturbation, the behavior of an electron in a nonpolar liquid, and comparison of photochemical and radiation chemical effects.…

Discusses the identity and nature of free radicals generated by radiolysis of aqueous solutions. (CS)

Describes a method to stimulate the dispersive properties of various media. It is also used to illustrate the characteristics of electromagnetic precursion. (Author/GA)

Among the special features of an inner city Detroit (Michigan) magnet school are a planetarium and a mass communications center. (Author/MLF)

Highlights two schools that have reduced their energy usage, one through such methods as weatherization and solar water collectors, and the other through switching from burning oil to burning wood pellets. (JM)

Provides an explanation for the apparent emission of x-rays from video display terminals. (CS)

Proposes that human comfort could be provided in otherwise chilly surroundings by filling the occupied space with electromagnetic energy of cm wavelength. Considerable energy savings could be realized from the resultant ability to lower interior temperatures and maintain comfort in the building. (Author/RE)

An energy-efficient library in New Rochelle (New York) incorporates part of an old garage. The new library was developed closely with a master plan to become the central focus and cultural center intended to encourage revitalization of the decaying downtown. (Author/MLF)