Cell Structure

November 17, 2009

//
The three cells you will be studying in this unit are prokaryote, animal and plant. At the end of the lesson you should be able to recognize the differences between prokaryotic and eukaryotic cells, differences between animal and plant cells and understand the function of the organelles in these different cells. Press the button [...]

Read the full article →

How enzymes act as catalysts

November 17, 2009

//
Life from a biochemist’s viewpoint is simply a coordinated series of reactions. Energy changes occur during reactions, and in fact, it is these changes in energy that drive reactions. In this animation you will be shown how reactions are driven by energy changes, and how enzymes, act as catalysts, increase the rates at which [...]

Read the full article →

Longevity Tied to Genes That Preserve Tips of Chromosomes

November 17, 2009

A team led by researchers at Albert Einstein College of Medicine of Yeshiva University has found a clear link between living to 100 and inheriting a hyperactive version of an enzyme that rebuilds telomeres — the tip ends of chromosomes.
The findings appear in a recent issue of the Proceedings of the National Academy of Sciences.
Telomeres [...]

Read the full article →

Ancient Penguin DNA Raises Doubts About Accuracy of Genetic Dating Techniques

November 16, 2009

Penguins that died 44,000 years ago in Antarctica have provided extraordinary frozen DNA samples that challenge the accuracy of traditional genetic aging measurements, and suggest those approaches have been routinely underestimating the age of many specimens by 200 to 600 percent.
In other words, a biological specimen determined by traditional DNA testing to be 100,000 years [...]

Read the full article →

Professor To Predict Weather On Mars

November 16, 2009

Is there such a thing as "weather" on Mars? There are some doubts, considering the planet`s atmosphere is only 1 percent as dense as that of the Earth. Mars, however, definitely has clouds, drastically low temperatures and out-of-this-world dust storms.
Istvan Szunyogh, a Texas A&M professor of atmospheric sciences, was recently awarded a NASA grant to [...]

Read the full article →

Teens Less Likely To Wash Hands When Cooking, More Likely To Cross-Contaminate Raw Food Than Adults

November 16, 2009

A Kansas State University study has shown that when preparing frozen foods, adolescents are less likely than adults to wash their hands and are more susceptible to cross-contaminating raw foods while cooking.
"While half of the adults we observed washed their hands after touching raw chicken, none of the adolescents did," said Casey Jacob, a food [...]

Read the full article →

Rosetta Bound for Outer Solar System After Final Earth Swingby

November 16, 2009

On the morning of November 13, mission controllers confirmed that ESA`s comet chaser Rosetta had swung by Earth at 8:45 CET as planned, skimming past our planet to pick up a gravitational boost for an epic journey to rendezvous with comet 67P/Churyumov-Gerasimenko in 2014.
Rosetta passed over the ocean, just South of the Indonesian island of [...]

Read the full article →

Fat Collections Linked to Decreased Heart Function

November 16, 2009

Researchers from Boston University School of Medicine (BUSM) have shown that fat collection in different body locations, such as around the heart and the aorta and within the liver, are associated with certain decreased heart functions. The study, which appears online in Obesity, also found that measuring a person`s body mass index (BMI) does not [...]

Read the full article →

Africa`s Rarest Monkey Had an Intriguing Sexual Past, DNA Study Confirms

November 16, 2009

The most extensive DNA study to-date of Africa`s rarest monkey reveals that the species had an intriguing sexual past. Of the last two remaining populations of the recently discovered kipunji, one population shows evidence of past mating with baboons while the other does not, says a new study in Biology Letters. The results may help [...]

Read the full article →

Green Heating and Cooling Technology Turns Carbon from Eco-Villain to Hero

November 16, 2009

Carbon is usually typecast as a villain in terms of the environment but researchers at the University of Warwick have devised a novel way to miniaturise a technology that will make carbon a key material in some extremely green heating products for our homes and in air conditioning equipment for our cars.
Most domestic heating and [...]

Read the full article →

← Previous Entries

Next Entries →