How Cells Obtain Energy from WVPT on Vimeo.
Wednesday, December 9, 2009
Thursday, May 14, 2009
Chemist Shows How RNA Can Be the Starting Point for Life
Chemist Shows How RNA Can Be the Starting Point for Life
By NICHOLAS WADE
Published: May 13, 2009
An English chemist has found the hidden gateway to the RNA world, the chemical milieu from which the first forms of life are thought to have emerged on earth some 3.8 billion years ago.
EXPLAIN THE THEORY OF ENDOSYMBIOSIS
By NICHOLAS WADE
Published: May 13, 2009
An English chemist has found the hidden gateway to the RNA world, the chemical milieu from which the first forms of life are thought to have emerged on earth some 3.8 billion years ago.
EXPLAIN THE THEORY OF ENDOSYMBIOSIS
Cooking Up Millions of Viruses for a New Vaccine
Cooking Up Millions of Viruses for a New Vaccine
By DENISE GRADY
Published: May 5, 2009
VALHALLA, N.Y. — As soon as Doris Bucher learned that a new strain of swine flu had turned up in the United States, she e-mailed the Centers for Disease Control and Prevention offering to send materials that might be useful in making a vaccine.
By DENISE GRADY
Published: May 5, 2009
VALHALLA, N.Y. — As soon as Doris Bucher learned that a new strain of swine flu had turned up in the United States, she e-mailed the Centers for Disease Control and Prevention offering to send materials that might be useful in making a vaccine.
Tuesday, April 21, 2009
On Darwin’s ‘On the Origin of Species’
On Darwin's 'On the Origin of Species'
In addition to being the 200th anniversary of Darwin's birth, 2009 is the 150th anniversary of the publication of his fundamental work, "On the Origin of Species." As with many original sources, it is known mostly by reputation. Few people who are not biologists read Darwin in the original. But his writing can still offer surprises, insights and pleasures, and it can be sampled here, with selections by prominent scientists of their favorite passages and discussions of why these passages are important. (Related Articles)
In addition to being the 200th anniversary of Darwin's birth, 2009 is the 150th anniversary of the publication of his fundamental work, "On the Origin of Species." As with many original sources, it is known mostly by reputation. Few people who are not biologists read Darwin in the original. But his writing can still offer surprises, insights and pleasures, and it can be sampled here, with selections by prominent scientists of their favorite passages and discussions of why these passages are important. (Related Articles)
From Studying Chimps, a Theory on Cooking
From Studying Chimps, a Theory on Cooking
By CLAUDIA DREIFUS
Published: April 20, 2009
Richard Wrangham, a primatologist and anthropologist, has spent four decades observing wild chimpanzees in Africa to see what their behavior might tell us about prehistoric humans. Dr. Wrangham, 60, was born in Britain and since 1989 has been at Harvard, where he is a professor of biological anthropology. His book, “Catching Fire: How Cooking Made Us Human,” will be published in late May. He was interviewed over a vegetarian lunch at last winter’s American Association for the Advancement of Science meeting in Chicago and again later by telephone. An edited version of the two conversations follows.
By CLAUDIA DREIFUS
Published: April 20, 2009
Richard Wrangham, a primatologist and anthropologist, has spent four decades observing wild chimpanzees in Africa to see what their behavior might tell us about prehistoric humans. Dr. Wrangham, 60, was born in Britain and since 1989 has been at Harvard, where he is a professor of biological anthropology. His book, “Catching Fire: How Cooking Made Us Human,” will be published in late May. He was interviewed over a vegetarian lunch at last winter’s American Association for the Advancement of Science meeting in Chicago and again later by telephone. An edited version of the two conversations follows.
Tuesday, April 7, 2009
Hint of Success in Gene Therapy Study
Hint of Success in Gene Therapy Study
NICHOLAS WADE
Published: Thursday, March 2, 2000
Gene therapy, long on promise and so far very short on fulfillment, may be achieving a glimmering of success in a treatment for hemophilia B, a disease in which the blood does not clot properly.
NICHOLAS WADE
Published: Thursday, March 2, 2000
Gene therapy, long on promise and so far very short on fulfillment, may be achieving a glimmering of success in a treatment for hemophilia B, a disease in which the blood does not clot properly.
Tuesday, March 31, 2009
A Census Taker for Penguins in Argentina
http://www.nytimes.com/2009/03/31/science/earth/31conv.html?ref=science
By CLAUDIA DREIFUS
Published: March 30, 2009
In the early 1980s, a Japanese company went to the Argentine government and said, “We’d like a concession to harvest your penguins and turn them into oil, protein and gloves.” There was a public outcry. This was during a military dictatorship when dissidents were being thrown into the ocean from airplanes. And yet people said, “We object to having our penguins harvested.”
By CLAUDIA DREIFUS
Published: March 30, 2009
In the early 1980s, a Japanese company went to the Argentine government and said, “We’d like a concession to harvest your penguins and turn them into oil, protein and gloves.” There was a public outcry. This was during a military dictatorship when dissidents were being thrown into the ocean from airplanes. And yet people said, “We object to having our penguins harvested.”
Saturday, March 28, 2009
HOW DOES EVOLUTION WORK?
1. By the means of what process does evolution occur?
2. What was Darwin’s fundamental question?
3. What four profecies are included in Natural Selection?
4. Are all individuals from the same species the same?
5. For evolution to occur, what has to happen to the adapted characteristics?
6. What did Darwin refer to when talking about struggle for existance?
7. What book did Darwin write?
8. What is the main important force in evolution?
PROTEIN SYNTHESIS
1. What's the name of the enzyme that unwinds DNA?
2. What is the name of the enzyme that adds RNA nucleotides to the complimentary DNA strand?
3. How many DNA strands are used to synthesize mRNA?
4. Where is mRNA synthesized?
5. Where are proteins synthesized?
6. How are the amino acids held together in the primary structure of a protein?
Tuesday, March 24, 2009
From Arctic Soil, Fossils of a Goliath That Ruled the Jurassic Seas
http://query.nytimes.com/search/sitesearch?query=fossils+from+arctic+soil&x=0&y=0&type=nyt
By JOHN NOBLE WILFORD
Published: March 16, 2009
There were monstrous reptiles in the deep, back in the time of dinosaurs.They swam with mighty flippers, two fore and two hind, all four accelerating on attack. In their elongated heads were bone-crushing jaws more powerful than a Tyrannosaurus rex’s. They were the pliosaurs, heavyweight predators at the top of the food chain in ancient seas.
By JOHN NOBLE WILFORD
Published: March 16, 2009
There were monstrous reptiles in the deep, back in the time of dinosaurs.They swam with mighty flippers, two fore and two hind, all four accelerating on attack. In their elongated heads were bone-crushing jaws more powerful than a Tyrannosaurus rex’s. They were the pliosaurs, heavyweight predators at the top of the food chain in ancient seas.
The Fight Plan for Clean Air
http://www.nytimes.com/2009/03/24/science/earth/24epa.html?scp=1&sq=clean%20air&st=cse
KATE GALBRAITH and FELICITY BARRINGER
Published: March 23, 2009
The Environmental Protection Agency, about to declare heat-trapping gases to be dangerous pollutants, has embarked on one of the most ambitious regulatory challenges in history.
KATE GALBRAITH and FELICITY BARRINGER
Published: March 23, 2009
The Environmental Protection Agency, about to declare heat-trapping gases to be dangerous pollutants, has embarked on one of the most ambitious regulatory challenges in history.
Wednesday, March 4, 2009
A Baby, Please. Blond, Freckles -- Hold the Colic
http://online.wsj.com/article/SB123439771603075099.html
By GAUTAM NAIK
FEBRUARY 12, 2009
Want a daughter with blond hair, green eyes and pale skin?
A Los Angeles clinic says it will soon help couples select both gender and physical traits in a baby when they undergo a form of fertility treatment. The clinic, Fertility Institutes, says it has received "half a dozen" requests for the service, which is based on a procedure called pre-implantation genetic diagnosis, or PGD.
By GAUTAM NAIK
FEBRUARY 12, 2009
Want a daughter with blond hair, green eyes and pale skin?
A Los Angeles clinic says it will soon help couples select both gender and physical traits in a baby when they undergo a form of fertility treatment. The clinic, Fertility Institutes, says it has received "half a dozen" requests for the service, which is based on a procedure called pre-implantation genetic diagnosis, or PGD.
Bacteria Run Wild, Defying Antibiotics
http://query.nytimes.com/gst/fullpage.html?res=9B00E7DD173FF931A35750C0A9629C8B63
By ABIGAIL ZUGER
Published: Tuesday, March 2, 2004
A new chapter in the continuing story of antibiotic resistance is being written in doctors' offices across the country, as a group of common bacteria rapidly becomes resistant to the antibiotics that have been used to treat them for decades.
By ABIGAIL ZUGER
Published: Tuesday, March 2, 2004
A new chapter in the continuing story of antibiotic resistance is being written in doctors' offices across the country, as a group of common bacteria rapidly becomes resistant to the antibiotics that have been used to treat them for decades.
Tuesday, March 3, 2009
Monday, March 2, 2009
Battling Bacterial Evolution: The work of Carl Bergstrom
http://evolution.berkeley.edu/evolibrary/article/_0_0/bergstrom_01
Author: Anna Thanukos, based upon interviews with Carl Bergstrom, University of Washington
Dr. Carl Bergstrom manages evolution. From his laboratory at the University of Washington, Carl figures out how to control the evolutionary future of microbe populations, nudging them towards particular destinies and away from others. His laboratory does not look like a traditional biology lab; rather than test tubes or microscopes or petri dishes, the rooms are full of computers, whiteboards, books, and coffee machines. But then again, Carl is not trying to evolve smarter dogs or to resurrect T. rex. Instead, he has his eye on a far more practical goal: to control how bacteria in hospitals evolve resistance to our drugs. His tools in this endeavor are computers, mathematics, and evolutionary theory, and the testing grounds for his ideas are hospital intensive care units.
Author: Anna Thanukos, based upon interviews with Carl Bergstrom, University of Washington
Dr. Carl Bergstrom manages evolution. From his laboratory at the University of Washington, Carl figures out how to control the evolutionary future of microbe populations, nudging them towards particular destinies and away from others. His laboratory does not look like a traditional biology lab; rather than test tubes or microscopes or petri dishes, the rooms are full of computers, whiteboards, books, and coffee machines. But then again, Carl is not trying to evolve smarter dogs or to resurrect T. rex. Instead, he has his eye on a far more practical goal: to control how bacteria in hospitals evolve resistance to our drugs. His tools in this endeavor are computers, mathematics, and evolutionary theory, and the testing grounds for his ideas are hospital intensive care units.
Babies Know: A Little Dirt Is Good for You
From One Genome, Many Types of Cells. But How?
http://www.nytimes.com/2009/02/24/science/24chromatin.html
One of the enduring mysteries of biology is that a variety of specialized cells collaborate in building a body, yet all have an identical genome. Somehow each of the 200 different kinds of cells in the human body — in the brain, liver, bone, heart and many other structures — must be reading off a different set of the hereditary instructions written into the DNA.
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