207 results found for biology

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Atmosphere - L-N - Crutzen - Chem 2009 00:31:00

Atmosphere Climate and Chemistry in the Anthropocene

by Paul Crutzen
Atmosphere Climate and Chemistry in the Anthropocene
for 18-22 and upwards,
Lectures | 18-22 and upwards | 4 years ago | 742 views
Rating:

Despite their relatively small mass, 10-5% of the earth biosphere as a whole, generations of ambitious 'homo sapiens' have already played a major and increasing role in changing basic properties of the atmosphere and the earth's surface. Human activ....

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Bacterial cell walls, antibiotics and the origins of life 01:10:00

Bacterial cell walls, antibiotics and the origins of life

by Jeff Errington
Bacterial cell walls, antibiotics and the origins of life
for 14-19 and upwards,
Lectures | 14-19 and upwards | 3 years ago | 518 views
Rating:

The cell wall is a crucial structure found in almost all bacteria. It is the target for our best antibiotics and fragments of the wall trigger powerful innate immune responses against infection. Surprisingly, many bacteria can switch almost effortl....

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Sakmann 00:04:00

Bert Sakmann

by Bert Sakmann
Bert Sakmann
for 18-22 and upwards,
Lectures | 18-22 and upwards | 9 years ago | 855 views
Rating:

Winner of the Nobel Prize 1991 in Physiology / Medicine 1991 together with Erwin Neher 'for their discoveries concerning the function of single ion channels in cells'

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Lander 01:19:00

Beyond the human genome project

by Eric Lander
Beyond the human genome project
for 18-22 and upwards,
Lectures | 18-22 and upwards | 8 years ago | 1046 views
Rating:

Dr Lander and his colleagues have developed many of the key tools and generated many of the key information resources for modern mammalian genomics. Their work includes mapping and sequencing of the human, mouse, and other genomes. He was elected a m....

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Rueda 00:10:00

Bioenergetics of Cancer Cells

by Elda Rueda
Bioenergetics of Cancer Cells
for 18-22 and upwards,
Lectures | 18-22 and upwards | 7 years ago | 865 views
Rating:

A brief summary from the literature about cancer cells' metabolism; 1) the major pathways cancer cells use to generate energy and macromolecules efficiently and rapidly and 2) the enzymes cancer cells up-regulate to control those pathways.

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Biological Evolution - Lindau-Nobel - Werner Arber - Medicine 2014 00:31:00

Biological Evolution in the Context of Cosmic Evolution and of Cultural Evolution

by Werner Arber
Biological Evolution in the Context of Cosmic Evolution and of Cultural Evolution
for 18-22 and upwards,
Lectures | 18-22 and upwards | 4 years ago | 769 views
Rating:

After reconsidering the very long time periods in cosmic evolution, we will focus our attention to the evolutionary development of living organisms on our planet Earth. The genetic variants (mutations), which are occasionally produced, are alteratio....

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Purcell 00:11:00

Body Fuel for Long Distances

by Sarah Purcell
Body Fuel for Long Distances
for 14-19 and upwards,
Undergraduate presentations | 14-19 and upwards | 8 years ago | 939 views
Rating:

In my geoset project I will be discussing the effects of nutrition in long distance endurance. Topics include saturating carbohydrate stores before a race, the Krebs (citric acid) cycle, the effects of dehydration and hyponatremia, and replenishing y....

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Tessier-Lavigne2 01:12:00

Brain development and brain repair.

by Marc Tessier-Lavigne
Brain development and brain repair.
for 18-22 and upwards,
Lectures | 18-22 and upwards | 8 years ago | 857 views
Rating:

The human brain is made up of close to a trillion nerve cells (or neurons), each of which makes connections with, on average, hundreds of other nerve cells, to form the complex neuronal circuits that control all brain activities, including perception....

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Medina 00:09:00

Breast Cancer Susceptibility Gene BRCA2

by Angelica Medina
Breast Cancer Susceptibility Gene BRCA2
for 18-22 and upwards,
Lectures | 18-22 and upwards | 7 years ago | 744 views
Rating:

BRAC2 is a tumor suppressor gene. Its protein product interacts with other proteins to assist regulation of DNA repair, transcription and cell cycle checkpoints. BRAC2 gene disruption may lead to protein truncation, mutations and loss of function. Ce....

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Toybox 10 ecoli 00:03:00

Bugs and trash

by Various Presenters
Bugs and trash
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 1213 views
Rating:

Using microorganisms to clear pollution.

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Can the wheat 00:05:00

Can the wheat which grows in dry areas solve the food crisis?

by Chiho Motokawa
Can the wheat which grows in dry areas solve the food crisis?
for 14-19 and upwards,
Highschool presentations | 14-19 and upwards | 3 years ago | 699 views
Rating:

Chiho describes her important work in looking for varieties of wheat which could help increase food production in arid areas.

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Merrel 00:07:00

Cape Gannets

by Sarah Merrel
Cape Gannets
for 14-19 and upwards,
Undergraduate presentations | 14-19 and upwards | 8 years ago | 924 views
Rating:

Study on Cape Gannets, a new prey for quickly adapting Great White Pelicans on Malgas Island, South Africa. First observed in 2008. Result of indirect human involvement; Cape Gannets should be reconsidered for conservation management.

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