Literaturnachweis - Detailanzeige
Autor/in | Carter, Henry A. |
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Titel | A Simple Recipe for Whitening Old Newspaper Clippings. |
Quelle | In: Journal of Chemical Education, 72 (1995) 7, S.651Infoseite zur Zeitschrift |
Sprache | englisch |
Dokumenttyp | gedruckt; Zeitschriftenaufsatz |
ISSN | 0021-9584 |
Schlagwörter | Leitfaden; Unterricht; Lehrer; Acids; Chemistry; Higher Education; Laboratory Equipment; Laboratory Procedures; Learning Activities; Paper (Material); Science Experiments; Science Instruction; Secondary Education Lesson concept; Instruction; Unterrichtsentwurf; Unterrichtsprozess; Teacher; Teachers; Lehrerin; Lehrende; Chemie; Hochschulbildung; Hochschulsystem; Hochschulwesen; Laborausstattung; Laboruntersuchung; Lernaktivität; Papier; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Sekundarbereich |
Abstract | Describes a method for experimenting with both whitening and deacidifying old newspaper clippings using sodium borohydride bleaching. Clippings are soaked in distilled water then immersed in sodium borohydride for 15-20 minutes. After rinsing with distilled water, the paper is washed with saturated Ca(OH)2 solution. Readers should not begin experimenting with historic documents or artifacts considered valuable. (PVD) |
Erfasst von | ERIC (Education Resources Information Center), Washington, DC |