Presents a set of laboratory experiments that can assist students in the detection of carbon dioxide. Offers a variation of the supported drop method of carbon dioxide detection that provides readily visible positive results. Includes background information on carbon dioxide. (ML)

Describes a relatively simple method of extraction and purification of bacterial DNA. This technique permits advanced secondary-level science students to obtain adequate amounts of DNA from very small pellets of bacteria and to observe some of its polymer properties. (ML)

Described is a physics experiment which investigates the reactions occurring when a hot dog is fried or broiled. (SL)

Discusses five experimental methods used by senior high school students to provide an accurate calibration curve of magnet current against the magnetic flux density produced by an electromagnet. Compares the relative merits of the five methods, both as measurements and from an educational viewpoint. (JR)

Briefly outlines the theoretical basis of the phenomenon of photoconductivity and describes a simple experiment which demonstrates the photoconductive properties of cadmium sulfide. (JR)

A test is described in which three psychotropic drugs were evaluated for their effects on pregnant rats. Behavioral changes are given. (SA)

Considers the nature and extent of bias toward experimentation and against correlational studies. Argues for the use of correlational studies and describes a field-tested approach to enabling students to direct open-ended investigations of this type. (45 references) (JRH)

Describes the structure of an in-depth laboratory project chemical engineering. Provides modeling work to guide experimentation and experimental work on heat transfer analysis. Discusses the experimental results and evaluation of the project. (YP)

Describes a process to develop high school laboratory activities using intertidal ecology of the New England Coast as an example. (MKR)

I present a proposal for a laboratory practice to generate and analyze data from a saturation equilibrium binding experiment addressed to advanced undergraduate students. [[superscript 3]H]Quinuclidinyl benzilate is a nonselective muscarinic ligand with very high affinity and very low nonspecific binding to brain membranes, which contain a high…

A model of reactive oxygen species metabolism is proposed as a laboratory exercise for students. The superoxide ion in this model is generated during the reaction of oxidation of xanthine, catalyzed by xanthine oxidase. The effect of catalase, superoxide dismutase, and allopurinol on superoxide ion generation and removal in this system is also…

A simple tea infuser is obtained and been used as a container for the dry ice to simulate the effect from high-density dry ice. The tea infuser is a simple, low cost device to allow instructors with access to dry ice makers to effectively use the interesting demonstration.

An HPLC and a UV-visible spectrophotometer are identified as instruments that helps to incorporate more biologically-relevant experiments into the course, in order to increase the students understanding of selected biochemistry topics and enhances their ability to apply an analytical approach to biochemical problems. The experiment teaches…

Advances in the field of molecular biology, powered by a technological revolution, have increased dramatically over the past decades. Notable developments such as the cloning of adult sheep, the sequencing of the human genome, and the production of genetically modified organisms capture the attention of biologists, their students, and the general…