Clipmarks | abailart's clips

Epigenetic research uncovers new targets for modification enzymes

Mon, 28 Apr 2008 00:17:25 GMT

clipped by: Silkweaver

Enzymes regulating genetic expression can be just as important as the genome itself, increasing evidence shows. The expanding field of epigenetics focuses on the multiple influences on DNA and surrounding molecules that determine whether genes are turned on or off during development and disease processes.

"This discovery broadens our view of methyltransferases and tells us that epigenetic regulation in cells is even more complicated than we thought," says principal investigator Xiaodong Cheng, PhD, professor of biochemistry at Emory University School of Medicine and a Georgia Research Alliance Eminent Scholar.

We have known for some time that we had a great deal more to discover about methyltransferases. This is an important piece of the puzzle, and additional research will continue to help us unwind the multiple mechanisms involved in epigenetic gene regulation."

Tags: biology, genetics, epigenetics, molecular biology

The science of Addiction

Sun, 27 Apr 2008 22:24:09 GMT

clipped by: dakotayii
clipper's remarks: Flash - why we feel -" High "

Clip Source: learn.genetics.utah.edu

Mouse Party

Note:

The simplified mechanisms of drug action presented here are just a small part of the story. When drugs enter the body they elicit very complex effects in many different regions of the brain. Often they interact with many different types of neurotransmitters and may bind with a variety of receptor types in a variety of different locations. For example, THC in marijuana can bind with cannabinoid receptors located on the presynaptic and/or postsynaptic cell in a synapse.

Where applicable, this presentation primarily depicts how drugs interact with dopamine neurotransmitters because this website focuses on the brain's reward pathway. Mouse Party is designed to provide a small glimpse into the chemical interactions at the synaptic level that cause the drug user to feel 'high'.

Tags: science

Insects Use Plants like a Telephone

Sun, 27 Apr 2008 19:13:56 GMT

clipped by: abailart

Clip Source: www.sciencedaily.com

Dutch ecologist Roxina Soler and her colleagues have discovered that subterranean and aboveground herbivorous insects can communicate with each other by using plants as telephones. Subterranean insects issue chemical warning signals via the leaves of the plant. This way, aboveground insects are alerted that the plant is already ‘occupied’.

Aboveground, leaf-eating insects prefer plants that have not yet been occupied by subterranean root-eating insects. Subterranean insects emit chemical signals via the leaves of the plant, which warn the aboveground insects about their presence. This messaging enables spatially-separated insects to avoid each other, so that they do not unintentionally compete for the same plant.

Via the 'green telephone lines', subterranean insects can also communicate with a third party, namely the natural enemy of caterpillars.

Tags: insect communication

M. C. Escher: Metamorphose

Sun, 27 Apr 2008 12:18:20 GMT

clipped by: Johanna_G

Clip Source: video.google.com

[Video]

Clip Source: www.logopress.es

Maurits Cornelis Escher (1898-1972)
Escher fue un artista innovador que experimentó en sus trabajos con la perspectiva, las ilusiones ópticas y los espacios imposibles. Su interés por la arquitectura, las matemáticas y la geometría se reflejan en sus conocidas estructuras imposibles, en paisajes oníricos y en sorprendentes transformaciones.

Tags: escher, parkettierungen, transformationen

Easter Message

Sun, 27 Apr 2008 10:35:07 GMT

clipped by: abailart

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Tags: easter

Emotional Self Harm

Sun, 27 Apr 2008 08:08:02 GMT

clipped by: abailart
clipper's remarks: So don't give in to Clipmarks addiction!

Clip Source: blogs.psychologytoday.com

We give in to feel good. Give in to what? Food, shopping, drinking, smoking, gambling, and, you guessed it, procrastination.

People will engage in behaviors that may be self-destructive (gambling, excessive shopping, overeating, smoking, procrastinating) if the behaviors make them feel better in the short term.

If we focus on our feelings in the short term, we'll undermine ourselves in the long run.

In fact, we may spend a lifetime acting like a 3-year-old, and rationalizing it to ourselves the whole time. I don't feel like it. I need to feel better in order to act. First, I need to feel better.

No you don't.

We give in to the impulse to walk away in order to feel good right now. Learning theorists would even add that we have now reinforced this behavior as the decrease in anxiety is rewarding.

Of course, this short-term strategy has long-term costs

Tags: maturity, feelings, emotional intelligence

The Riches of Socialist Britain

Sun, 27 Apr 2008 07:51:21 GMT

clipped by: abailart
clipper's remarks: Meanwhile, this parody of a Labour government has increased taxes on the poorest segment of society who are already hit by massive inflation on the most basic of survival resources such as food.

Clip Source: business.timesonline.co.uk

The richest 1,000 people in Britain have seen their wealth quadruple under Labour, according to The Sunday Times Rich List published today. Even under Gordon Brown’s brief premiership their fortunes have soared by 15%, just as the financial squeeze and faltering house prices have hit ordinary people.

foreign billionaires are making London one of the global capitals for a mobile “superclass”. The highest new entry on the list is Alisher Usmanov, a tycoon with interests in mining, steel, media and banking; he is a close ally of Valdimir Putin, the former Russian president. Usmanov, worth £5.7 billion

Also a new entry is Leonard Blavatnik, a Russian who made his fortune in oil. He has a £41m home in London and ranks 11th on the list at £3.9 billion. Another arrival from the former Soviet Union is Vladimir Kim, who heads the London-based mining company Kazakhmys. Kim is worth £2.9 billion.