Showing 1-10 of 10 assets

The Dirt on Ammonia as a Cleaning Agent

Date : 04/15/2011

Clip Length : 00:06:15

This NBC Learn video explains how ammonia works with water to dissolve fatty acids, like stearic acid, in greasy dirt; includes animation illustrating deprotonation, and explaining the Brønsted-Lowry definition of acids and bases.

The Dirt on Ammonia as a Cleaning Agent
Ammonia from Meteorites Could Have Aided Start of Life on Earth

Date : 02/28/2011

Clip Length : 1

This 2011 "Scientific American" article reports that an Antarctic meteorite released "copious ammonia" -- a source of nitrogen and key ingredient in many biomolecules -- when heated with water, the latest evidence that space rocks might have brought "biological precursors" to Earth. Source: Scientific American, February 28, 2011

Ammonia from Meteorites Could Have Aided Start of Life on Earth
How Did Earth's Atmosphere Form?

Date : 01/01/2011

Clip Length : 3

Explanation, using text and graphics, of the evolution of Earth's atmosphere, from the planet's just-formed era (very warm hydrogen and helium); through release, as Earth's crust formed, of volcanic gases, CO2 and ammonia; to the current CO2 and oxygen atmosphere. Source: NASA

How Did Earth's Atmosphere Form?
Alternatives to Hazardous Products

Date : 12/02/2010

Clip Length : 1

EPA "reminder" chart listing substitutes for "hazardous" household cleaners, and alternative non-hazardous methods for cleaning drains, ovens and glass, and polishing silver and furniture.

Alternatives to Hazardous Products
Household Cleaners to be Reformulated to Clean Up California Smog

Date : 11/19/2010

Clip Length : 3

This 2010 "Scientific American" article reports on a new smog-reduction regulation in the state of California that limits highly reactive solvents known as VOCs in some 2,000 household cleaning products, from window cleaner to metal polish. Source: Scientific American, November 19, 2010

Household Cleaners to be Reformulated to Clean Up California Smog
Avoiding the Dangers of Household Cleaners

Date : 08/06/2010

Clip Length : 00:01:58

Between 1990 and 2006, more than half a million American children under the age of five were treated for injuries related to household cleaning products, most of them toddlers who ingest or inhale often strong chemicals.

Avoiding the Dangers of Household Cleaners
Nitrogen Fertilizer: Agricultural Breakthrough

Date : 03/20/2009

Clip Length : 3

This 2009 "Scientific American" article reports on the side effects of the ammonia-based synthetic nitrogen fertilizer that started the "Green Revolution" and transformed world food production: nitrogen pollution of rivers and waterways, that is growing as more crops are grown for biofuels. Source: Scientific American, March 20, 2009

Nitrogen Fertilizer: Agricultural Breakthrough
A Fertilizer Good For Only Growing Things, Not Destroying Them

Date : 09/25/2008

Clip Length : 2

This 2008 "Scientific American" article reports on production of a fertilizer that combines ammonium sulfate with ammonium nitrate, which makes a fertilizer that is non-explosive. Ammonium nitrate fertilizer has been used by in explosives used in several major terrorist attacks. Source: Scientific American, September 25, 2008

A Fertilizer Good For Only Growing Things, Not Destroying Them
Ammonia Molecules Straighten Up

Date : 06/01/2007

Clip Length : 2

June 2007 report summarizes research that establishes that ammonia -- once thought to behave differently than water -- has the same characteristics as water in the bonding of adjacent molecules: ammonia clusters are held together by linear hydrogen bonds. Source: Pacific Northwest National Laboratory

Ammonia Molecules Straighten Up
Eureka! The Invention of the Vacuum Cleaner

Date : 01/11/1996

Clip Length : 00:03:13

This 1996 TODAY show feature tells the story of James Murray Spangler, the inventor of one of the first portable electric vacuum cleaners in 1907, when only 10 percent of American homes had electricity. AIt was up to another man -- "Boss" Hoover -- to market the invention.

Eureka! The Invention of the Vacuum Cleaner

Showing 1-10 of 10 assets

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The Science of the Olympic Winter Games videos are only available to visitors inside the United States due to licensing restrictions on the Olympics footage used in the videos.

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