Why do we need to pour less water in an egg steamer to prepare more eggs to the same degree of 'doneness'? We discuss the physical processes at work in the electric egg steamer and resolve this seeming paradox. We demonstrate that the main heat transfer mechanism from steam to egg is due to latent heat through condensation. This not only explains…

This paper explores the contradictions of 'doing' feminist research, and how the materiality of engaging in fieldwork magnifies the gap between 'ideal' versus 'actual' feminist ways of conducting research. Drawing on my Doctoral research with British-Pakistani mothers of children with SEND, I explore the ethical and methodological challenges of…

In this paper, we report an experiment intended as a tool to introduce chemistry and materials science students to several chemical concepts through the determination of the best experimental conditions for the formation of calcium oxide (lime) from a source of high content of calcium carbonate (eggshells). Thermal gravimetric analysis (TGA),…

A laboratory experiment is described that extracts the tetrapyrrolic teal-colored biliverdin IXa, as its dimethyl ester, from commercially available emu eggshells. The extraction of ~10 mg samples of biliverdin is simple and requires two 3 h lab periods: A two-step acid digestion and liquid-liquid extraction, followed by short silica gel flash…

Instructors often struggle with how to make sense of and handle hurtful student course evaluation comments. These comments can be difficult to resolve when they move from constructive course criticisms to hurtful comments about an instructor's race, gender, appearance, or personality. Relying on the Meaning Making Model (MMM), this study explored…

In this report, drawing on the spring 2022 American Instructional Resources Survey, the authors examine teachers' awareness of and responses to limitations on how they can address race- or gender-related topics in their instruction. Teachers experienced limitations that infringed on their instructional autonomy, which included their choice of…

A simple and cost-effective laboratory experiment is described that extracts protoporphyrin IX from brown eggshells. The porphyrin is characterized by UV-vis and fluorescence spectroscopy. A chemiluminescence reaction (peroxyoxalate ester fragmentation) is performed that emits light in the UV region. When the porphyrin extract is added as a fluor…

Describes procedures that can help students to make model geodes from eggshells, copper sulfate, and other crystalforming substances. (HM)

Contrasts two fourth-grade teachers' treatment of a student's robin eggshell. One teacher continues with a conventional, text-based science lesson; the other asks what the eggshell means and helps students devise research questions to be pursued in the library and in art class. Also, seven provocative questions are posed for would-be education…

Begins with the procedure and results from an investigation on the effect of fluoride on the reaction between eggshell (substitute teeth) and dilute ethanoic acid. Describes an elegantly modified and improvised apparatus. (DDR)

Today information science is confronted with three major handicaps: (a) to overcome its preoccupation with scientific and technical information; (b) to strip the eggshells" remaining from its ancestor disciplines; and (c) to find its systems approach." (Author)

The applications of a Pasco CI-6532 pressure sensor used in conjunction with a datalogger to monitor the liberation of carbon dioxide in the reaction CaCO3(s) + 2H(super +)(aq) --> Ca(super 2+)(aq) + CO2 (g) + H2O(I) are described. The method serves for the determination of the chemical kinetics of the reaction and also can be extended to…

Describes interdisciplinary activities for teaching elementary science using eggs. Each activity is designed to introduce larger thematic units. Activities include making egg animals (study of animal survival), throwing raw eggs at taut vertical sheets and making cars for egg passengers (force and momentum), and making eggshell domes (dome…

Children from Jewish schools in New York participated in an art exhibit with an environmental theme. (SP)