Showing 1-14 of 14 assets

Molecule Profile:  H<sub>2</sub>O - Water

Date : 01/11/2011

Clip Length : 00:04:46

This NBC Learn video "profiles" the H2O molecule -- its structure, polarity, cohesive and adhesive properties, and water's properties as a "universal" solvent.

Molecule Profile: H2O - Water
Chemistry of Ice

Date : 12/22/2011

Clip Length : 00:05:53

This NBC Learn video explains how the molecular structure of H2O changes as it reaches its freezing point, and turns from a liquid to a less dense solid crystal lattice.

Chemistry of Ice
Chemistry of Salt (NaCl)

Date : 12/22/2011

Clip Length : 00:06:23

This NBC Learn video explains and illustrates the molecular structure of sodium chloride (NaCl) crystals; the structure and symmetry of crystal lattices; and why one crystalline solid, salt, melts another, ice.

Chemistry of Salt (NaCl)
The Chemistry of  CO2: Carbon Dioxide

Date : 11/18/2011

Clip Length : 

This NBC Learn video explains and illustrates the molecular structure of CO2; how the bonding of the carbon and oxygen molecules illustrates the Octet Rule, or Rule of 8; carbon dioxide and carbonation; the role of CO2 in the Earth's atmosphere; and how changing levels of CO2 can affect the temperature on the Earth's surface, including the oceans.

The Chemistry of CO2: Carbon Dioxide
The Chemistry of Green: Chlorophyll

Date : 03/16/2011

Clip Length : 00:05:35

This NBC Learn video explains the basic role of the pigment molecule chlorophyll in photosynthesis, and explains why plants are -- or appear to be -- green: because chlorophyll molecules absorb visible light in all color wavelengths except green, which is reflected back, into our eyes.

The Chemistry of Green: Chlorophyll
The Chemistry of Flowers

Date : 05/06/2011

Clip Length : 00:05:58

This NBC Learn video explains the basic role of pigment molecules -- carotenoids and anthocyanins -- in producing what humans see as color in flowers, as the pigment molecules absorb visible light of various color wavelengths.

The Chemistry of Flowers
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
It's a Wash: The Chemistry of Soap

Date : 09/13/2011

Clip Length : 00:05:48

This NBC Learn video explains how soaps and detergents work to break up grease and dirt on soiled surfaces, by breaking water's surface tension and suspending dirt and oil particles in water so it can be wiped away.

It's a Wash: The Chemistry of Soap
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
How Atoms Bond: Ionic Bonds

Date : 01/10/2012

Clip Length : 00:06:28

This NBC Learn video uses common table salt to explain and illustrate what happens between the electrons and protons in atoms of the element sodium and atoms and the element chlorine to make crystals of sodium chloride.

How Atoms Bond: Ionic Bonds
The Chemical Bond Between Cloves and Nutmeg

Date : 01/28/2011

Clip Length : 00:04:07

This NBC Learn video focuses on chemical bonds by profiling eugenol and isoeugenol, two molecules with identical molecular structures except for the placement of one double bond -- a difference that makes eugenol responsible for the flavor and aroma of cloves, and isoeugenol responsible for the taste and smell of nutmeg.

The Chemical Bond Between Cloves and Nutmeg

Date : 01/21/2011

Clip Length : 00:04:15

This NBC Learn video "profiles" a chiral or mirror-image molecule, carvone, and explains how the "handedness" of a molecule can change its properties -- resulting, in carvone, in the distinctly different flavors and aromas we perceive as spearmint, caraway and dill.

"Mirror" Molecule: Carvone
Diamonds, Pencils and Buckyballs: A Look at Buckminsterfullerene

Date : 10/06/2011

Clip Length : 00:06:00

This NBC Learn video focuses on the structure and properties of buckminsterfullerene molecules, carbon allotropes, along with diamonds and graphite, usually referred to as buckyballs. Buckyballs have a hollow spherical shape, like the geodesic spheres designed by American inventor and architect R. Buckminster Fuller.

Diamonds, Pencils and Buckyballs: A Look at Buckminsterfullerene
Fabricating Fabric: Profile of Nylon

Date : 05/13/2011

Clip Length : 00:06:48

This NBC Learn video explains charts the history of nylon, the first synthetic fiber developed for mass production, and explains polymers, polymerization, amide links and polyamides. Includes demonstration of the Nylon Rope Trick: making nylon fiber in a lab beaker. (Beta-sheet protein courtesy Markus Buehler, MIT)

Fabricating Fabric: Profile of Nylon

Showing 1-14 of 14 assets

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