The Dewar flasks that we use for storage of cryogenic fluids such as liquid nitrogen, oxygen, and helium, and which known outside the laboratory as "thermos bottles" were invented by James Dewar, who was the first person to liquefy hydrogen, and was nearly first in the nineteenth century races to liquefy all of the other gases.
JCE ChemEd Xchange provides a place for sharing information and opinions. Currently, articles, blogs and reading lists from ChemEd X contributors are listed below. We plan to include other items that the community wishes to share through their contributions to ChemEd X.
Well, the final version of the National Science Education Standards has finally arrived. If you are involved in curriculum planning for your school or district, or if you want to study the document in detail, you can buy a copy for $19.95 + 4.00 shipping from the National Academy Press, 2101 Constitution Avenue, NW, Lockbox 285, Washington DC 20055 [1-800-624-6242].
In the novel "The Children of Men" by P. D. James, set in the year 2021, mankind is faced with extinction due to the worldwide sterility of human males. Is there a basis for fear that this is actually happening? Or is the reported decline in sperm counts, over the past half-century, even a fact?
After nearly a century of "modern" archaeology in Egypt's Valley of the Kings, it is surprising that any substantial finds remain to be uncovered, but archaeologist Kent R. Weeks discovered last year what appears to be a huge complex of tombs.
The forensic sciences have received a great deal of attention lately, partly as a result of the OJ trial, but in this lengthy piece, the fine writer, John McPhee, writes about the far less-familiar field of forensic geology.
In Culver City, California, David Wilson operates The Museum of Jurassic Technology. There, the visitor learns that the breath of a duck will cure children of fungal infections of the mouth, and that bedwetting is curable by "eating a mouse on toast, fur and all".
Edward O. Wilson is the world's most recognized expert on ants. In "Naturalist", his autobiography, he traces his personal and professional history from childhood in Alabama, where an accident destroyed one of his eyes, to Professorship at Harvard, and international recognition. Wilson also became an extremely controversial figure with the publication of "Sociobiology" in the 1970's.
This book is published and distributed as part of the Research Corporation series "of occasional papers on neglected problems in science education". Should we be encouraging our students to prepare for careers in science? If so, what prospects for employment await them, and how ought we best to prepare them?
This book was first published in 1972, and is still in print, in paper. The author also wrote "The Great Santini", "The Lords of Discipline", and "The Prince of Tides". His current best-seller is "Beach Music". "The River is Wide" is a fictionalized version of Conroy's own experiences as a teacher of isolated and neglected rural black children in South Carolina.
What do you know about Tsunamis ("tidal waves")? Did you know that most people who have lost their lives to these waves have done so because they were lured to newly-exposed "dry" land as the sea receded in front of the Tsunami? I didn't either, until I read this fascinating article in discontinued wonderful magazine of the New York Academy of Sciences.