19 results found for polar

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00:31:00

The Adventure of Cold Atoms. From Optical Pumping to Quantum Gases

by Claude Cohen-Tannoudji
The Adventure of Cold Atoms. From Optical Pumping to Quantum Gases
for 18-22 and upwards,
Lectures | 18-22 and upwards | 8 years ago | 1328 views
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Conservation laws are very important in quantum physics. Two examples of applications will be given. First, optical pumping which uses transfer of angular momentum from polarized photons to atoms to produce highly polarized atomic gases. Then, laser ....

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00:11:00

Deviations from ideal behaviour

by Alfonso Felipe
Deviations from ideal behaviour
for 18-22 and upwards,
Lectures | 18-22 and upwards | 9 years ago | 1393 views
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Understanding the phenomena that cause the reduction in efficiency that occurs in the fuel cell operation

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00:08:00

Overpotential

by Alfonso Felipe
Overpotential
for 18-22 and upwards,
Lectures | 18-22 and upwards | 9 years ago | 2728 views
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Polarization curves of the fuel cells, and the phenomena which cause a decline in energy efficiency

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00:11:00

Direct Methanol Fuel Cells

by Alfonso Felipe
Direct Methanol Fuel Cells
for 18-22 and upwards,
Lectures | 18-22 and upwards | 9 years ago | 1402 views
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Methanol fuel cells (DMFC), its rationale and the advantages and limitations of their use over other fuel cells

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01:04:00

Communicating with light

by Polina Bayvel
Communicating with light
for 14-19 and upwards,
Lectures | 14-19 and upwards | 9 years ago | 1381 views
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Most of the data we generate and receive (whether emails, tweets, videos or mobile calls) are now carried by optical fibres, which use light to transmit vast quantities of information over trans-oceanic distances. The use of hundreds of wavelengths ....

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00:06:00

Radiation in Your Kitchen: Basic Microwave Oven Physics

by Daniel Julio Domínguez
Radiation in Your Kitchen: Basic Microwave Oven Physics
for 11-14 and upwards,
Teaching modules | 11-14 and upwards | 9 years ago | 3519 views
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They're awesome to have in the kitchen, but did you ever wonder how your microwave actually works? This is a quick introduction to the theory that makes our home microwave ovens possible. Here, Daniel covers the differences between microwave heati....

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00:32:00

Part 3: Selective Microwave Heating of a Polar Reaction Substrate

by Gregory Dudley
Part 3: Selective Microwave Heating of a Polar Reaction Substrate
for 18-22 and upwards22 and upwards,
LecturesPostgraduate presentations | 18-22 and upwards22 and upwards | 9 years ago | 2837 views
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In part three of this three part series, FSU chemist Dr. Gregory Dudley, summarizes the conclusions of ongoing FSU microwave chemistry research. He discusses the implications and future prospects of microwave research, addressing how other labs could....

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00:29:00

Membrane Proteins: Importance, Functions, Mechanisms

by Hartmut Michel
Membrane Proteins: Importance, Functions, Mechanisms
for 18-22 and upwards,
Lectures | 18-22 and upwards | 9 years ago | 1409 views
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Biological membranes define and compartmentalize the cells of higher organisms. Consisting of membrane proteins and lipids, they are basically impermeable for ions and polar substances, so that electric voltages (_membrane potentialsî) and substanc....

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00:28:00

Canoeing in the Arctic, a Scientist’s Perspective

by Peter Agre
Canoeing in the Arctic, a Scientist’s Perspective
for 18-22 and upwards,
Lectures | 18-22 and upwards | 9 years ago | 1587 views
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As scientists, our livelihoods are supported by teaching and research, but we also have the opportunity to make observations beyond our usual confines and share these with non-scientific citizens. Growing up in my native state of Minnesota, I have al....

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00:34:00

Greenhouse Gases and Climate Change

by Sherwood Rowland
Greenhouse Gases and Climate Change
for 18-22 and upwards,
Lectures | 18-22 and upwards | 9 years ago | 1581 views
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The 'greenhouse gases (GHG)' intercept a fraction of outgoing terrestrial infrared radiation, creating the natural greenhouse effect which warmed the atmosphere by approximately 32 Celsius at the beginning of the 20th Century. The activities of manki....

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00:06:00

Polarisation

by Charlotte Ward
Polarisation
for 14-19 and upwards,
Highschool presentations | 14-19 and upwards | 9 years ago | 2148 views
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Polarisation and its uses

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00:10:00

Determining the Crystallographic polarity of the wurtzite structure non-destructively

by Jesse Williams
Determining the Crystallographic polarity of the wurtzite structure non-destructively
for 22 and upwards,
Postgraduate presentations | 22 and upwards | 10 years ago | 2187 views
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