Thursday, August 25, 2011

Stem cells under an electron microscope


Gel frame and will serve as the supplier of the necessary substances, and (at first) the protection of cells from the effects imposed by the unfavorable environment of the body, and this - the key to success.

Over time, the hydrogel is degraded completely and absorbed into the body. This is another important feature of the invention, the programmed addition of certain molecules to its structure.

Conboy explains: "Within a few days the stem cells will be contained in an optimal environment with a good chance that they will restore the sick or old cloth."

While researchers are conducting experiments in vitro, to understand how adult stem cells in mice muscles behave in a gel. Soon they plan to transplant the gel skeleton in young and old animals with damage to the muscles, in the hope that tissue to repair itself.


Hydrogel undergoes a phase transition at a temperature of 34 degrees Celsius. This research could lead to a new method for treating degenerative diseases such as muscular dystrophy, or even help in the reconstruction of brain tissue and blood vessels.

Long-term objective of authors of the gel is to learn how to remove tissue from malfunctioning stem cells, put them into the hydrogel, reproduction and seek input biomaterial back into the human body to improve its ability to self-repair.

"Now, our health is at a decent level of about 40 years, and after that - begins to deteriorate, - said Irina. - But I'm optimistic I think that you might feel quite well up to 90 years. "

Robot-lizard taught to climb the glass


The robot tries to imitate the gecko lizards: its legs are synthetic bristles, made ​​of elastomer, each of these hairs "attracted" to the wall of the intermolecular force, known as van der Waals force (of such experiments see here and here ).

StickyBot while moving very slowly breaks down, but the researchers hope that robots of this type will in future serve as planetary rovers and / or rescue boats. By which a person becomes a spider, but more about robots Cliff-bot , and Lemur .

Mine boots created robots:

Unlike the old shoes for engineers, designed for damping shock and preserve the integrity of the feet, shoes are designed to exclude the robot itself undermining.

They are equipped with six "legs" (each), in which are embedded detectors. If the electronics approach captures the metal when the owner of such shoes puts foot down, automatic instantly lifts up the proper support, while the remaining five legs provide stability of man, taking on the weight. Thus, walking through a minefield, the owner of the mine shoe on mine does not.

They note that the testing and improvement of the system will still continue, but to the invention has already expressed interest in several companies.

Tuesday, August 23, 2011

Wristwatches begin to fight malaria


Carrier in the wrist tiny needle four times a day and check the blood for parasites. If any show up, an alarm sounds and the screen flashes bright hours a color picture. After that, the owner must take three tablets that kill emerging disease within 48 hours.

To ensure that at-risk people take pills, watch contacted by radio to a central computer, for example, a company that decided by «Malaria Monitor» protect their workers.

Founded by the inventor of the firm Gervans Trading has received 1.5 million orders from companies, government organizations and charities working in Africa.

«Malaria Monitor» is, at first glance, is not cheap - 1.7 thousand rand ($ 280), but the prevention and treatment of patients with malaria is much more expensive.

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Procedural same memories


Had no effect on the smell of roses and memorization of the material in case it gave the subjects after the training, but also to sleep - during waking hours.

Finally, it was found that did not make sense to give the smell of roses continuously through the night in a row (although he then found himself from time to time and to the right, slow phase of sleep). The fact that a person becomes accustomed to the constant smell and no longer notice it.

But to get to the desired phase of sleep researchers have been easy, since the experimental sleep in the laboratory and, accordingly, it was attached monitor brain activity.

Interestingly, this effect works only with the roses so-called declarative memories, how to include pictures and maybe the word. That is, memories of their own motor actions are not subject to this influence, say the authors of the work.



The question arises - is it possible for the night recalling the lesson to use other stimuli - sound, shall we say? Can not exclude it. That's only the "flavors are particularly suited for such an experience, as they are, firstly, it is extremely effective evoke memories, and, secondly, do not have hardly any disturbing effect on sleep itself," - written by German researchers.

But, you, who dare to expose for the sake of the session under the current head? Albeit weak. So, students prepare armfuls of roses. Just do not forget about the phase of sleep, when his dream, and the need to "paint" in pink.

Monday, August 22, 2011

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Friday, August 19, 2011

Open the mechanism of action of ginkgo on the brain


Has a healing effect on the brain. This plant was used in ancient China, it is used today. But it confirmed the healing properties of little research. Pursuing the study of strokes, a scientist and his colleagues found a mechanism that would deal with the consequences of stroke. They found that mice that lack the enzyme heme observed-oxygenase, poorly restored after a stroke.

This enzyme converts heme (iron-containing compound, a part of many proteins), creating dangerous oxygen radicals, the heme-oxygenase, which - on the contrary, neutralize oxygen radicals. Based on existing studies, Dr. Dore and co-workers made the assumption that increase production of heme-oxygenase and ginkgo may protect brain cells thereby.

To test this idea, they first performed experiments with neurons of the brain, taken from mouse embryos. It was found that cells found in the extract of Ginkgo biloba, less exposed to oxygen radicals than those that were in the normal environment. It is important that very high doses of Ginkgo biloba extract cells provide virtually complete protection.

In the next stage researchers took three groups of living mice. In the first group - mutant mice in which the nature of the heme-oxygenase elaborated a little. The second and third groups - normal mice. First and second group of experiments gave for ginkgo, and the third was a control. After that, all the mice artificially cause a stroke and compared the results.

It was found that mice from the first group to feel worse than rodents in the second. This confirmed the role of heme-oxygenase in the development of stroke. In addition, mice that were not given ginkgo, recovered equally worse than mice in the second group. Thus, the experiment has certified the useful effect of the investigated plants.

These experiments have confirmed the usefulness of rigorous scientific and ginkgo has shown that this herb is a potent neuroprotective.