Study looks at pigtailed macaque in the context of visual recognition problems adapted from a standardized test developed for use with human infants. Results demonstrate that the low-risk group easily differentiated novel from previously seen targets; the high-risk group gave no evidence of recognition. (Author/RWB)

Describes two complementary laboratory exercises that use the glass fiber assay to assess receptor specificity and hormone binding affinity in rat liver cytoplasmic extracts. Details the methods, materials and protocol of the experiments. Discusses the basic concepts illustrated and the feasibility of using the experiments at the undergraduate…

Describes an experiment to discover the topology of plasma membrane aminophospholipids (phosphatidylethanolamine and phosphatidylserine) using whole platelets and trinitrobenzene sulfonate (TNBS) as a probe. Reports changes in phospholipid distribution during platelet activation with simultaneous action of thrombia and collagen. Details the…

Describes generic problem-solving model constructed by D. Koberg and J. Bagnall that can be used by writing center tutors and that progresses as follows: (1) accept situation, (2) analyze, (3) define, (4) ideate, (5) select, (6) implement, (7) evaluate. Provides tutors with coherent framework and with way of breaking larger framework down into…

Twenty teachers were selected to teach 20 elementary classes a science lesson featuring laboratory experience in small groups. Ten teachers were alerted to the possibilities of sexism in the physical sciences. Results indicated girls in mixed-sex work groups participate less when the teacher is less aware of sexism problems. (Author/CH)

Describes a demonstration in which gaseous ammonia and hydrochloric acid are used to illustrate rates of diffusion (Graham's Law). Simple equipment needed for the demonstration include a long tube, rubber stoppes, and cotton. Two related demonstrations are also explained. (DH)

Reviews background of atomic absorption spectrometry techniques. Discusses problems encountered and precautions to be taken in determining trace elements in the parts-per-billion concentration range and below. Concentrates on determining chromium in biological samples by graphite furnace atomic absorption. Considers other elements, matrices, and…

Presents excerpts of a survey on the instrument status in chemistry departments and the perceived needs of those departments for new instruments. Responses are based on data from 32 chemistry departments at major research institutions, 71 departments at smaller schools, and 13 chemical engineering departments. (JN)

Describes the philosophy, facility features, and program offerings at Brown University's environmental education center. The Urban Environmental Laboratory (UEL) is an integrated instruction, residential, demonstration project for students and the public community. Conservation technologies, active learning, and hands-on experience characterize…

Describes and laments over the problems of working writing centers on college campuses, including misinformed students and faculty, the lack of adequate facilities, and the lack of professional respect. (CRH)

Describes the analysis of dandelion peduncle growth based on peduncle length, epidermal cell dimensions, and fresh/dry mass. Methods are simple and require no special apparatus or materials. Suggests that limited practical work in this area may contribute to students' lack of knowledge on plant growth. (Author/DH)

A simple, rapid, and safe method has been developed for disrupting bacterial cells for protein studies. The method involved stepwise treatment of cells with acetone and with sodium dodecyl sulfate solution to allow extraction of cellular proteins for analysis by polyacrylamide gel electrophoresis. Applications for instructional purposes are noted.…

Describes the components, functions, and applications of a computer-based audio/video learning laboratory at Texas Christian University that permits on-line communication between student learners and instructional staff. The laboratory gives instructors feedback from student learners during and after instruction and enables students to evaluate…

Planning for the Modesto City School's introductory computer education program involved six questions: (1) What should students learn? (2) How should they learn it? (3) How long should/does it take? (4) How well are students learning it? (5) Can we do it better? and (6) Can we do it in less time? (LMO)

Provides directions for setup and performance of two demonstrations. The first demonstrates the principles of Raoult's Law; using a simple apparatus designed to measure vapor pressure. The second illustrates the energy available from alcohol combustion (includes safety precautions) using an alcohol-fueled missile. (JM)