Showing 1-11 of 11 assets

Chemistry of Changing Leaves

Date : 10/12/2011

Clip Length : 00:04:22

This NBC Learn video explains the role of the pigment molecule chlorophyll when tree foliage in northern areas changes in autumn from green to shades of yellow, orange and red.

Chemistry of Changing Leaves
Turning Over a New Leaf: How Leaves Die

Date : 11/11/1985

Clip Length : 00:02:35

In 1985, researchers at Cornell University study the dying process in leaves, after exposing leaf surfaces to light bursts, herbicides and chemicals common in air pollution.

Turning Over a New Leaf: How Leaves Die
Autumn Leaves' Brilliant Colors Good For Trees

Date : 10/29/2007

Clip Length : 1

This 2007 Scientific American news brief reports on findings that nutrient-poor soil produces more red pigment in autumn tree leaves. Source: Scientific American, October 29, 2007

Autumn Leaves' Brilliant Colors Good For Trees
Why Do We Have Seasons?  (Diagram)

Date : 10/12/2011

Clip Length : 1

This diagram uses images and text to explain how the Earth's tilt as it rotates on its axis and orbits around the sun, changes the planet's angle to the sun, resulting in what we experience as seasons. Source: NOAA, NASA

Why Do We Have Seasons? (Diagram)
What Tree Has This Shape of Leaf? (Color Chart)

Date : 10/12/2011

Clip Length : 1

This color chart shows the shape of individual leaves from 55 different trees in the U.S., from ash to hickory, elm to maple, oak to yew. Source: Alabama Cooperative Extension System

What Tree Has This Shape of Leaf? (Color Chart)
Autumn Colors:

Date : 10/12/2011

Clip Length : 8

Slide show of eight Associated Press photographs taken in autumn "leaf-peeping" months in New Hampshire, Vermont, Maine, and Colorado. Source: AP

Autumn Colors: "Leaf-Peeping" Slide Show

Date : 10/12/2011

Clip Length : 00:04:40

In this 21st Century Chemist profile, North Carolina State University chemist Dr. Elon Ison explains his research on catalysts that could be used to make alternative fuels -- for example, efficiently converting methane gas into methanol as an alternative to gasoline.

"Green" NC State Chemist Looks for Cleaner, Safer Fuel Process
Biofuel Leader: Sweden Gets Energy from Wood Waste, Organic Waste

Date : 04/21/2008

Clip Length : 00:03:01

Sweden is one of the pioneering countries in "green living", attempting to cut it's carbon emissions but still growing its economy.

Biofuel Leader: Sweden Gets Energy from Wood Waste, Organic Waste
The Brave New World of

Date : 07/08/2011

Clip Length : 2

This 2011 Scientific American news story surveys recent "green chemistry" discoveries and newly-introduced legislation aimed at finding alternatives for harsh and dangerous chemicals in consumer products. Source: Scientific American, July 8, 2011.

The Brave New World of "Green Chemistry"
Green Chemistry: Scientists Design New

Date : 05/28/2010

Clip Length : 6

This 2010 Scientific American news analysis story cites progress made in "green chemistry," reducing levels of hazardous chemicals in manufacturing and products, and raises questions about current chemicals policy and the need for more regulation. Source: Scientific American, May 28, 2010

Green Chemistry: Scientists Design New "Benign By Design" Drugs, Paints, Pesticides and More
The Electromagnetic Spectrum: Diagram

Date : 05/20/2008

Clip Length : 1

Diagram of The Electromagnetic Spectrum with drawings, showing wavelengths (in meters), relative size of wavelengths, common name of waves, sources, frequency (in waves per second) and energy of one photon (in electron volts). Source: Lawrence Berkeley National Laboratory

The Electromagnetic Spectrum: Diagram

Showing 1-11 of 11 assets

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