Untitled. John B. Calhoun. Biography[edit] Early years[edit] John B.
Calhoun was born May 11, 1917 in Elkton, Tennessee, the third child of James Calhoun and Fern Madole Calhoun. Their first child died in infancy. John (Jack) had three siblings: an older sister, Polly, and two younger brothers, Billy and Dan. His family moved from Elkton to Brownsville, Tennessee, and finally to Nashville, when Jack was in junior high school. At this time, he began attending meetings of the Tennessee Ornithological Society. It was at Northwestern that he met his future wife, Edith Gressley, who was a biology major and a student in one of his classes.
Early rat studies[edit] After graduating from Northwestern, he taught at Emory University and Ohio State University. While posted at Jackson Lab in Bar Harbor, Maine, he continued studying the Norway rat colony until 1951. Calhoun and family moved back to Silver Spring, Maryland, in 1951. Norway rat experiments[edit] The research area was divided into three parts. Mouse experiments[edit] Environmental impact of paper.
A pulp and paper mill in New Brunswick, Canada.
Although pulp and paper manufacturing requires large amounts of energy, a portion of it comes from burning wood residue. The environmental impact of paper is significant, which has led to changes in industry and behaviour at both business and personal levels. With the use of modern technology such as the printing press and the highly mechanised harvesting of wood, disposable paper has become a cheap commodity. This has led to a high level of consumption and waste. With the rise in environmental awareness due to the lobbying by environmental organizations and with increased government regulation there is now a trend towards sustainability in the pulp and paper industry.
Issues[edit] According to a Canadian citizens organization, "People need paper products and we need sustainable, environmentally safe production Deforestation[edit] Main article: Deforestation Air pollution[edit] 1942–44 musicians' strike. On August 1, 1942, the American Federation of Musicians, at the instigation of union president James Petrillo, started a strike against the major American recording companies because of disagreements over royalty payments.
Beginning at midnight, July 31, no union musician could record for any record company.[1] That meant that a union musician was allowed to participate on radio programs and other kinds of musical entertainment, but not in a recording session in a recording. The strike did not affect musicians performing on live radio shows, in concerts, or, after October 27, 1943, on special recordings made by the record companies for V-Discs for distribution to the armed forces fighting World War II, because V–Discs were not available to the general public.
Itled. Welcome to The Bone Room Web Site. Gaia hypothesis. The study of planetary habitability is partly based upon extrapolation from knowledge of the Earth's conditions, as the Earth is the only planet currently known to harbour life The Gaia hypothesis, also known as Gaia theory or Gaia principle, proposes that organisms interact with their inorganic surroundings on Earth to form a self-regulating, complex system that contributes to maintaining the conditions for life on the planet.
Topics of interest include how the biosphere and the evolution of life forms affect the stability of global temperature, ocean salinity, oxygen in the atmosphere and other environmental variables that affect the habitability of Earth. Introduction[edit] Less accepted versions of the hypothesis claim that changes in the biosphere are brought about through the coordination of living organisms and maintain those conditions through homeostasis. In some versions of Gaia philosophy, all lifeforms are considered part of one single living planetary being called Gaia. Aerogel. A block of aerogel in a person's hand Aerogel was first created by Samuel Stephens Kistler in 1931, as a result of a bet with Charles Learned over who could replace the liquid in "jellies" with gas without causing shrinkage.[3][4] IUPAC definition Gel comprised of a microporous solid in which the dispersed phase is a gas.
Note 1: Microporous silica, microporous glass, and zeolites are common examples of aerogels. Note 2: Corrected from ref. [4], where the definition is a repetition of the incorrect definition of a gel followed by an inexplicit reference to the porosity of the structure. [6] Project MUSE. JSTOR. Poetry 180 - Home Page. Welcome to Poetry 180.
Poetry can and should be an important part of our daily lives. Poems can inspire and make us think about what it means to be a member of the human race. By just spending a few minutes reading a poem each day, new worlds can be revealed. Poetry 180 is designed to make it easy for students to hear or read a poem on each of the 180 days of the school year. I have selected the poems you will find here with high school students in mind. Listening to poetry can encourage students and other learners to become members of the circle of readers for whom poetry is a vital source of pleasure.
Billy Collins Former Poet Laureate of the United States Learn more about Billy Collins More Poet Laureate projects. Library of Congress Home. Amélioration du français - Accueil. Expressions idiomatiques. Find the Meanings and Definitions of Words at Dictionary. Home. Idioms and phrases.
Daily Script - Movie Scripts and Movie Screenplays. Howard-Tilton Memorial Library at Tulane University. Edge : Conversations on the edge of human knowledge. Online Talking Dictionary.