Showing posts with label experiment. Show all posts
Showing posts with label experiment. Show all posts

7/23/2008

How to raise a giant rabbit

There are two methods to artificially alter the traits and qualities of animals: selective breeding and genetic manipulation. The latter involves the manipulation of genes in biotechnology laboratories.

For example, three years ago scientists from the August Cieszkowski Agricultural University in Poland, rabbits inserted in the gene for human growth hormone. The resulting transgenic animals were larger than the rest of their fellow human beings, although the real purpose of the experiment was that females produce this hormone for human therapeutic use, for example, children with growth problems.

Another way to alter the size of a rabbit is through selective breeding, a practice that farmers have been doing for thousands of years.
This is basically select copies with a quality and encourage their reproduction.
Thus, the Berlin keeper Hans Wagner has managed to breed giant rabbits with a weight of 8 to 10 kilos and a length next to Subway.

Tolerance to pain

Last year, a team of scientists from the University of Bath conducted an experiment with 50 volunteers, men and women to check their tolerance to pain.
They suggested introducing his arm in a bath of warm water for two minutes, then place in ice water for a further period equal to or unable to withstand suffering.
Women felt pain much earlier than their peers, and were able to stand for less time.

When it comes from within. The results caused no great surprise. That women tolerate pain better internal, such as childbirth, but are more sensitive to external pain and painful illnesses primarily as fibromyalgia, is something that scientists suspected to time.

However, it was a few months ago when a study published in the journal Annals of Internal Medicine offered a neurological basis through the application of imaging techniques representation.
The MRI revealed that, before the pain, the brain areas stimulated in men and women are different.

What's more, production of endogenous pain-relieving substances, called endorphins, also depends on gender.
A soothing? Another recent discovery is the different response to pain killers of men and women.

For example, it has been shown that ibuprofen is less effective against pain in them.

7/15/2008

Dream of invisibility

Progress in this area are reported with excitement by several defence agencies. Some already funded studies on new materials capable of making invisible to ios soldiers.

na night December 1940, the engineer Edmund Godfrey Burr, in the service of the Canadian Navy, had a disconcerting experience.

As I watched with a binocular an airplane landing, saw him disappear so unexpected. After much thought, came to understand what had happened.
What was observing was the plane's black profile against the background of the sky.

The runway was covered with snow. The moonlight reflected from the surface illuminated white sea skimming the plane, eliminating the contrast with the brightness of the sky, causing the plane to be made invisible to their eyes.

The experience of Burr began a series of experiments whose aim was approaching craft with a light of the same intensity that the widespread in the sky.
Thus, its profile would be indistinguishable in night flights.

The evidence came to reduce by up to 75% visibility of the craft, but to advance the war, the priorities of the Canadian Navy changed and the trials were interrupted in 1943.
However, the military have never stopped dreaming of invisibility. One of the keys of war is not being seen by the enemy.
The concealment and masking of troops and equipment moving million in the research of the most powerful armies.

One of the most relevant results in this field is the Stealth technology. Machinery equipped with it have a color, shape, noise, electronic and thermal controlled so that it is very difficult to detect with radar.

What is clear is that the concealment total change in sight wars. "I suspect that the military are already working on the invisibility through the metamaterials", warning Ulf Leonhardt.

Indeed, some teams already receive funding from the British Navy, Army and the U.S. also is investigating military applications of these compounds.

7/09/2008

The century of UFOs

From lights in the sky with the infamous kidnapping of human clinical trials, through messages of universal peace and evil conspiracies. Here is his story.

1947 .- A pilot sees some strange objects in the sky. Planes Are secrets of governments?

From 1950 to 1970.-was founded belief that they are extraterrestrial craft. From the testimonies of lights in the sky becomes the first contacted, speaking with people from Venus, Jupiter's satellite Ganymede ...

From 1970 to 1980.-is widespread belief in a encubrimento by governments in the world.
It popularize Men in Black, who threaten witnesses of UFOs. The U.S. guardarian remnants of a star ship.

From 1980 to 2000.-appear abductions and the first groups of clear religious component.

Genetic study extraterrestrial

The extraterrestrials would be conducting a genetic study and the human species would be the subject of their experiments. One of its purposes would kidnap people for the manufacture of other beings.

This is not a breeding program but production: the aim of the abduction would be the summoning of children. Have we become insane? No, these are the thesis of two "authorities" on malcría, which are not nuts: the artist Budd Hopkins and Professor David Jacobs of Temple University in Philadelphia (USA).

According to them, moreover, the abduction is inherited: parents, children and even grandparents of an allegedly abducted in turn been abducted by aliens. For the Harvard psychiatrist John E. Mack, who died in 2004, his wife of gynaecological problems have been caused by extraterrestrial abductions and bread would be a great program for the cosmic "spiritually damaged".

7/08/2008

Mental health: psychotic symptoms

For many mental health experts, psychotic symptoms stem from a ruptured selective attention. Humans have the ability to pay attention to certain stimuli-signal-ignoring other similar non-noise-we are interested. For example, at a party can choose a particular conversation and focus on it without what they say prosecute persons who may be even closer than those who have decided to listen.

According to supporters of the hypothesis lack of selective attention, schizophrenics are unable to make such a filter.
In this sense, Constance Holden, of the University of Maine, has compiled experiments indicate that those suffering from schizophrenia have difficulty ei eliminate irrelevant material and keep the material relevant to a given problem.

So irrelevant stimuli-the raindrops on a window, repeating a particular word in a conversation, the chances striking-can distract its attention from the global scene contemplating or message from someone who is speaking.

7/07/2008

The water huraño

Henry Cavendish was born in Nice in 1731. From eccentric character and confused, lived his entire life as an inmate: detestable company of other men and terrorized him by the women to such an extent that forbade their maids crossed with him.

Cavendish took his passion in science and experience, his obsession. His devotion was such that in his experiments on electricity measured the intensity of the flow by gravity of the suffering downloads: used himself as ammeter! Cavendish was the first to break down water into oxygen and hydrogen.

According to his personality, she did not mind at all the fame you could bring this forward and barely was concerned that other scientists knew about their investigations.
He lived by and for science in total solitude and even when his health was broken, as demanded death had lived, alone.

12/06/2007

The nuclear Energy and The Cold Fusion

In front of the fission energy that is currently the used in the world, an important part of the efforts of the scientists is centered in investigating the great alternative, inexhaustible and clean: the fusion energy, and in short in a variant of the same one: the cold" "fusion.

We know that the nuclear fusion currently more developed and investigated it is the one that binds the isotopes of hydrogen (tritium and deuterium) through high temperatures (a hundred million grades). It is the call warm fusion.

This immense heat is necessary to expire the force of electrostatic repulsion of the isotopes (when having the electric same imposition), exciting them in such a way that you/they end up uniting, creating a new state of the matter: the plasma.

Given the difficulties to procure those temperatures and, mainly, to confine the plasma (for magnetic confinement or for inertial confinement), the cold fusion has been investigating that is able to create energy without heating necessity.

The experiment of Fleischmann and Pons.-
As it usually happens in science, the first results were achieved by chance. 1989 two American chemists' of the University of Utah (Martin Fleischmann and Stanley Pons) March 23 assured in a conference achieved book credit the cold fusion by means of a plain genius and through the electrolysis, with a bar of flanked paladio without stopping of platinum, submerged in water weighted sample (rich in deuterium).

With this system, applying an electric current, the deuterium separates the oxygen of the water and he/she accumulates in the paladio bar. Arrived a point, the cores of the deuterium and of the paladio they melt to room temperature, causing the nuclear reaction that releases energy, detected by the emission of neutrons.

Fleischmann and Pons that came developing the experiment from 1984 with funds of the Department of Energy of U.S, assured obtained book credit the equivalent one to 1 energy watio for cubic centimetre of water, what would represent 1 million times more than what you/they showed the measured emissions of neutrons and some 50 times more than the utilized energy.

However, the scientific community didn't believe such results, trying by all possible means to reproduce the experiment without success.

It is more, if those data were correct, the released neutrons would have killed to the whole scientific team that was present in the experiment, that which didn't happen (fortunately).

The extraneous of the case is that it has not reproduced this result again and it is more, the two scientist wanted to publish the experiment in the magazine Nature (it is the investigators' standard to publish their results in magazines scientists to give them to know and to grant world relevance to the same ones), but they didn't achieve it when not responding to the logics questions of the scientific teams of the publication.

The experiment of Scaramuzzi.-
In spite of the failures of the scientists and to that one says consequently that the cold fusion was not possible, retiring several controls and labs of its investigation, few weeks after the announcement of the Americans, the Italian Professor Scaramuzzi changed some elements of the experiment and, although it didn't achieve the energy "obtained" by Fleischmann and Pons, yes it demonstrated that the fusion in cold is possible.

Their experiment deleted the electrolysis and it substituted the paladio for a titanium ball. Submerging the titanium in gaseous and achieved deuterium a balance between the pressure of the gas and the temperature, the fusion was gotten. The professor Scaramuzzi measured 491 issued drives of neutrons when he/she only hoped to register 30.


The cold fusion at the present time.-
Inside the investigations routed to achieve practical and profitable long term results, the technique of the sonoluminiscencia is applying that consists basically in the emission of light for the submitted liquids to ultrasounds.


The future of the cold fusion.-
In spite of being the black sheep in the investigations it has more than enough fusion, of being procured similar results to those of Fleischmann and Pons, it would suppose it a revolution in the energy fonts.

A single liter of fuel would satisfy the energy necessities of an entire building during several years, or of a family during all its life.

Also, the energy of cold fusion, doesn't not only infect and it is inexhaustible (as that of warm fusion), but rather it is also very much cheaper of procuring. All the nations could have their generating plants and you could end up even thinking of vehicles moved by nuclear fusion, generating portable teams, atomic inexhaustible battery, airships and ships that didn't need to refuel, etc.

And going further on, it could even favor the colonization of other planets.
However, with the feet in the floor must wait still some more years to see the first results, if it is that the controls put true interest in the cold fusion and the particular economic interests of energy companies don't prevail and of those same controls in relation to the current fuels.