The hen skin, or the duck meat that the Englishmen say, is kind of an erizamiento of the pores of the skin that he/she reminds us once to those birds plucked.
But, what does it cause the hen skin? which is the mechanism?
The hen skin is the answer to certain stimuli:
#I startle or fright
#cold
#chill or alteration in the spirit
Although, in fact, the three refer to a descent of corporal temperature, either so much for environmental causes as for internal causes, either for the chills caused by the fear or the nerves or for the intense sentimental sensation as a music an aroma or any other circumstance that it moves us.
The operation is the following one:
In the deepest part in the dermis they are the glands sudoríparas, the fatty fabric, the bulbs pilosos and a fine musculature that it operates on the pores, dilating and contracting those tiny sphincters with the purpose of maintaining the temperature. If there is an excess of heat they open up to liberate perspiration and to contribute to the corporal cooling for evaporation. If there is a lack of heat (I fry) they contract and they close to avoid the loss of more heat.
When this muscular group—called musculus erecting pili or muscle horripilador—he/she contracts, the pore closes, the skin forms a bundle around the follicle and the hair is bristled, giving the hen skin as a result.
This reflection is in the man a resíduo of in the past, because our body is not so covered with hair as in prehistoric time, but in many hairy animals it is a very useful mechanism to maintain the heat, because when being bristled the coat he/she swells in its group and it provides an insulating layer of much more size.
On the other hand, the fright or fright that it unchains this mechanism are part of the answer of to escape or to fight that it is presented before a threat. The erizamiento of the hair provides a bigger size that he/she helps to intimidate the opponent. In this respect remembering the hair erizamiento and the snorts of a threatened cat, the erect posture of the bear or the membranes of the neck of the lizard of Kingy (yes, for that reason it accompanies an image from the lizard to this entrance, for if he/she asked it to him some onlooker), dedicated artifices all them to offer a more lowering aspect. As the one that you/they should offer our ancestros with the bristled corporal body hair.
Tuesday, August 4, 2009
Why is the cut apple darkened?
When being exposed the meat from certain fruits to the action of the air we can observe how it is darkened lapsed some instants.
This happens with fruits like the apple, the pear, the banana… and with other foods like the potatoes or the mushrooms, to put algunoes examples.
This pardeamiento process calls himself oxidation, because it is the result of the action of the contained oxygen in the air in combination with the chemical compounds of the fruit, in short on the fenoles.
In the reaction an enzyme intervenes as catalyst: the polifenol oxidasa (PPO), thanks to which the fenoles combines with the oxygen to become quinonas that you polimerizan or they react with groups amino of different compounds forming colorful compounds that you/they receive the name of melanins and that they have properties antimicrobianas, and that they could be a mechanism of defense of the vegetables against infections.
The citric acid is oxidized with great easiness and it can be used to eliminate the oxygen and to avoid that the fruit is darkened. For it, if it is soaked in lemon juice the apples cut in sheets they will remain clear for much more time.
In the same way, if we seek to prepare a Macedonian of fruits we will begin obtaining the orange juice and to go introducing in him the apple, pear and banana, because the acid will avoid them to be darkened.
He/she notices sabionda: The compound fenólicos classified as secondary metabolitos of the plants, is those products biosintetizados in the plants that possess the biological characteristic of being secondary products of their metabolism, and the chemical characteristic of containing a group fenol at least in their molecular structure. Many are defense products before herbivores and patógenos, others provide mechanical support to the plant, others attract polinizadores or dispersores of fruits, some of them absorb the ultraviolet radiation, or they act as agents alelopáticos influencing in other plants.
How does the cinema work in 3D?
A rarity, a curiosity… that was the cinema in 3D in the past. But at the moment it seems that the industry of the entertainment begins to bet for him.
More and more he/she prepares in the homes of systems of reproduction of great quality: screens of big dimensions, systems of digital reproduction of video, encircling sound and other marvels that allow to enjoy the cinema at home. So it is logical that I/we are offered something different to be able to visionar in the commercial rooms.
There are different systems to offer cinema in 3D that have left perfecting with the step of the time, but all they are based on the same principle: the vision estereoscópica.
And what is the vision estereoscópica?
Our eyes are as photographic cameras that obtain plane images, of two dimensions. Due to the separation that exists eyes between both, this binocular vision gets two images that are lightly different, and that difference varies in function from the distance to which you/they are the different objects that fall in our field of vision.
Our brain is the one in charge of interpreting those plane images in way queconstruye the tridimensionalidad to which we are accustomed.
So the different systems of three-dimensional cinema try to reproduce the form in that our eyes register images of the real world, so that we perceive the imágen projected in a plane screen as if it was not two-dimensional.
A lot of time has passed from the first intents, those based on the color, in those that the spectator used some special glasses that you/they covered the eyes with a semi-transparent cellophane of red color on an eye and of blue color on the other one. Each eye perceived this way a different imágen, according to the color portion that each one of the cellophanes let pass without filtering. The result was an acceptable tridimensionalidad sensation.
Later on they began to be projected the images in real color (not the red-green of the previous method) and to be used glasses of polarized glasses, in such a way that the glass of an eye allowed to see the image emitted in a polarized light and the other one the image emitted in another polarized light.
At the moment the movie is in fact two movies projected at the same time with the inserted frames and the glasses they have a filter LCD that is synchronized with the projection system, so that the glasses are darkened alternatingly so that an eye watches a movie and the other one sees the other one and that the slight differences among both conform the three-dimensional image, in the same way that the brain forms the three-dimensional image starting from the real world.
If the projection frequency is sufficiently high, twinklings of any class and the sensation 3D are not detected it is very convincing.
: So that an alive being can enjoy three-dimensional vision, it is indispensable that it has two eyes located in the front of his skull. It is an indispensable evolutionary adaptation to calculate the distances correctly.
He/she notices sabionda: And the following step seems that it will be the holographic cinema, still in development that consists from a screen made up of multitude of small units to those that can be changed its transparency, shine and color. When impacting the light on those elements in different state, it is gotten that the light reflected in the screen forms the wanted image. If the changes are carried out with the enough speed the movement sensation it is achieved
Because it is internationally used does the SOS to request aid?
I have read somewhere around that he/she is attributed the meaning of «Save Our Souls» (it Saves our souls) but the true meaning this very expressed here with Francisco's summary José Dávila Dorta:
The Titanic threw its CQD and its SOS in Continental Morse (International) that is to say: CQD = -. -.--. - -.. AND SOS =...---... (DE MGY = -... ----. -.--). In 1903 the Italians recommend that it is used as sign of danger a SSSDDD (in morse, clear, because the fonía doesn't still exist). The topic you discusses and when not coming to an agreement he/she decides to leave it for 1906. Seen it, in 1904 Marconi he/she intends that their stations use the CQD like disaster sign. CQD doesn't mean Quickly he/she Eats Distress (they Come Quickly: Disaster). it is Simply a CQ (general Call that one had come imposing between the telegraphers and radioaficionados (Marconi was it), followed by the D=Danger (I am in danger). In 1906 the Conference of Berlin adopts the disaster sign SOE. There were protests because the AND end was only a point and it would rot «to get lost» etc. All suited that it was preferable reutilizar the S leaving it as SOS and discarding, in passing, the American proposal of using «NC» as «Necessity of immediate help. In 1908 it is adopted the SOS officially although the telegraphers instinctively continue using the CQD. They made this way it in their first calls the own Phillips and Braid, of the Titanic, until the Captain Smith tells to Phillips: «A SOS sends, it is the new sign and maybe be its last opportunity to use it». The own Marconi, in the Annual of Telegraphy and Wireless Telephony of 1918 recognizes that SOS opted for its clarity clarity for anyone that listened to it: SOS =...---... (dit-dit-dit-daat-daat-daat-dit-dit-dit) and he/she doesn't have anything to see with «Save Our Souls»,»Save Our Ship»,»Send Our Soccour» neither with anything resemblance. The first CQD of which one has news corresponds to the American ship «Sacred Rosa» of California that emitted it in 1908. The first SOS registered was also emitted in 1908 and he/she made it the vapor Minnehaha that New York went to London and embarrancó in England amid a strong fog. The frequency of the SOS was already the 500 Kilocycles; but the USA didn't officialize the SOS neither that frequency until after the disaster of the Titanic in 1912, and it took even this way a lot of time in being accepted fully. In spite of what we believed, the Titanic didn't throw the last CQD neither neither the first SOS. But it continues being the most famous ship in the history. Another sign of urgency was XXX, with the consideration of less urgent than the SOS. The sign TTT was used as sign of danger to notice of next ice, storms or other sailing problems. Finally the word PRESCRIBES (in Spanish language) it was used when a ship, without doctor on board, needed that from another ship or from earth takes him one to solve some problem in the company. In 1912 they were adopted the 500 kilocycles like frequency of call of international aid officially, for the reasons that we already exposed. A silence of 3 passed minutes was demanded the minutes 15 and 45 after every hour. Something like that happened with the later wave of international aid (even effective) for work in fonía, of 2182 Khz. When finally the fonía, the SOS was imposed it passed MAYDAY to be said, the XXX is PAN and for the TTT the word SECURITE was used, of course in the aid frequency for call in fonía (2182 Khz) already mentioned.
The Titanic threw its CQD and its SOS in Continental Morse (International) that is to say: CQD = -. -.--. - -.. AND SOS =...---... (DE MGY = -... ----. -.--). In 1903 the Italians recommend that it is used as sign of danger a SSSDDD (in morse, clear, because the fonía doesn't still exist). The topic you discusses and when not coming to an agreement he/she decides to leave it for 1906. Seen it, in 1904 Marconi he/she intends that their stations use the CQD like disaster sign. CQD doesn't mean Quickly he/she Eats Distress (they Come Quickly: Disaster). it is Simply a CQ (general Call that one had come imposing between the telegraphers and radioaficionados (Marconi was it), followed by the D=Danger (I am in danger). In 1906 the Conference of Berlin adopts the disaster sign SOE. There were protests because the AND end was only a point and it would rot «to get lost» etc. All suited that it was preferable reutilizar the S leaving it as SOS and discarding, in passing, the American proposal of using «NC» as «Necessity of immediate help. In 1908 it is adopted the SOS officially although the telegraphers instinctively continue using the CQD. They made this way it in their first calls the own Phillips and Braid, of the Titanic, until the Captain Smith tells to Phillips: «A SOS sends, it is the new sign and maybe be its last opportunity to use it». The own Marconi, in the Annual of Telegraphy and Wireless Telephony of 1918 recognizes that SOS opted for its clarity clarity for anyone that listened to it: SOS =...---... (dit-dit-dit-daat-daat-daat-dit-dit-dit) and he/she doesn't have anything to see with «Save Our Souls»,»Save Our Ship»,»Send Our Soccour» neither with anything resemblance. The first CQD of which one has news corresponds to the American ship «Sacred Rosa» of California that emitted it in 1908. The first SOS registered was also emitted in 1908 and he/she made it the vapor Minnehaha that New York went to London and embarrancó in England amid a strong fog. The frequency of the SOS was already the 500 Kilocycles; but the USA didn't officialize the SOS neither that frequency until after the disaster of the Titanic in 1912, and it took even this way a lot of time in being accepted fully. In spite of what we believed, the Titanic didn't throw the last CQD neither neither the first SOS. But it continues being the most famous ship in the history. Another sign of urgency was XXX, with the consideration of less urgent than the SOS. The sign TTT was used as sign of danger to notice of next ice, storms or other sailing problems. Finally the word PRESCRIBES (in Spanish language) it was used when a ship, without doctor on board, needed that from another ship or from earth takes him one to solve some problem in the company. In 1912 they were adopted the 500 kilocycles like frequency of call of international aid officially, for the reasons that we already exposed. A silence of 3 passed minutes was demanded the minutes 15 and 45 after every hour. Something like that happened with the later wave of international aid (even effective) for work in fonía, of 2182 Khz. When finally the fonía, the SOS was imposed it passed MAYDAY to be said, the XXX is PAN and for the TTT the word SECURITE was used, of course in the aid frequency for call in fonía (2182 Khz) already mentioned.
Because the Englishmen drive of the left side?
Because the Englishmen drive of the left side?
Many conjectures have been made but the one that I find but logic dates of the times in that you rode for prepared roads to circulate simultaneously in two senses. In those times the gentlemen (and it is not that they were very educated but rather they walked to horse) they preferred to travel of the left side of the road he/she stops this way to have free their right arm in case that the traveler that leave toward the one wanted to attack it suddenly or they even wanted to offer them its friendship shaking hands them.
Many conjectures have been made but the one that I find but logic dates of the times in that you rode for prepared roads to circulate simultaneously in two senses. In those times the gentlemen (and it is not that they were very educated but rather they walked to horse) they preferred to travel of the left side of the road he/she stops this way to have free their right arm in case that the traveler that leave toward the one wanted to attack it suddenly or they even wanted to offer them its friendship shaking hands them.
Why are there times that we are reflected in the water?
Why are there times that we are reflected in the water?
In occasions when we are in some he/she laughed or lake is reflected our image in the water.
This happens because the light of the sun that arrives to the water is distributed in three ways.
A part is absorbed in form of calor.Otra it leaves it it crosses, desviándose.A this phenomenon is called refraction.
And it finishes it part he/she is reflected.
The reflection takes place since in the surface of the water this he/she behaves as a mirror.
When the water this in calm, many times we can see our image sharply reflected in the water.
In occasions when we are in some he/she laughed or lake is reflected our image in the water.
This happens because the light of the sun that arrives to the water is distributed in three ways.
A part is absorbed in form of calor.Otra it leaves it it crosses, desviándose.A this phenomenon is called refraction.
And it finishes it part he/she is reflected.
The reflection takes place since in the surface of the water this he/she behaves as a mirror.
When the water this in calm, many times we can see our image sharply reflected in the water.
Questions Without Answers
Questions Without Answers
Does he/she wash his face a bald one until where?
What mierda did he/she have to study Have-man to have the master of the universe?
A childbirth in the street, is public lit?.
Why do the sodas have artificial juice of lemon and the detergents natural juice of lemon?
Why do we press stronger the bellboys of the remote contol at distance when he/she has few piles?
Why do they wash themselves the towels? Is not it supposed that we are clean when we use them?
The world is round and they call it planet. If was plane, would we call it redondeta?
Why when in the car we don't see something do we turn off the radio?
And why if we don't hear it do we take off the glasses of sun?
If a lawyer goes mad, does it lose the trial?
Do the infants enjoy the childhood as much as the adults the adultery?
What verbal time is it "should not it have happened"? imperfect Preservative?
What do they count the sheep to be able to sleep?
For that the black plums are red when they are green?
Where is the other half of Middle East?
Why needles are they used sterilized to administer a lethal injection?
What should it be made if one sees an animal in extinction danger eating a plant in extinction danger?
Why when it rains do we lift the shoulders? Do we wet ourselves maybe less?
Does he/she wash his face a bald one until where?
What mierda did he/she have to study Have-man to have the master of the universe?
A childbirth in the street, is public lit?.
Why do the sodas have artificial juice of lemon and the detergents natural juice of lemon?
Why do we press stronger the bellboys of the remote contol at distance when he/she has few piles?
Why do they wash themselves the towels? Is not it supposed that we are clean when we use them?
The world is round and they call it planet. If was plane, would we call it redondeta?
Why when in the car we don't see something do we turn off the radio?
And why if we don't hear it do we take off the glasses of sun?
If a lawyer goes mad, does it lose the trial?
Do the infants enjoy the childhood as much as the adults the adultery?
What verbal time is it "should not it have happened"? imperfect Preservative?
What do they count the sheep to be able to sleep?
For that the black plums are red when they are green?
Where is the other half of Middle East?
Why needles are they used sterilized to administer a lethal injection?
What should it be made if one sees an animal in extinction danger eating a plant in extinction danger?
Why when it rains do we lift the shoulders? Do we wet ourselves maybe less?
Why do the northerly dawns take place in the poles?
Why do the northerly dawns take place in the poles?
In the polar sky they originate some luminous effects that have different colors and variable durations, they call themselves northerly dawns.
Until a long time ago their nature was not known, that is to say, not you wise because these northerly dawns took place.
Today it is known that they are produced by electrified particles coming from the sun.
They take place in the poles because, in the surface of the sun they originate eruptions that remove particles, these particles they are attracted by the magnetic fields of the poles.
When crossing the atmosphere and to mix with the air that effect of brightness so curious and so spectacular it is believed.
The northerly dawns take place so much in the north pole as in the south pole.
Why did Fleming discover the penicillin?
Why did Fleming discover the penicillin?
Great part of the discoveries in the world of the investigation originates in a casual way.
This same step with the discovery of the penicillin.
Fleming was working with some bacterias called golden estafilococos, accidentally, he/she discovered that these were destroyed by a very common mushroom originated by the decomposition of certain substances.
This British scientist discovered, without intending it, the power germicide of this called mold
Penicillium Notatum, that is to say, the penicillin.
Thanks to this casual one he/she was discovered an universal remedy against many microbial illnesses.
Until that moment much people died for illnesses that today, we find very simple.
Great part of the discoveries in the world of the investigation originates in a casual way.
This same step with the discovery of the penicillin.
Fleming was working with some bacterias called golden estafilococos, accidentally, he/she discovered that these were destroyed by a very common mushroom originated by the decomposition of certain substances.
This British scientist discovered, without intending it, the power germicide of this called mold
Penicillium Notatum, that is to say, the penicillin.
Thanks to this casual one he/she was discovered an universal remedy against many microbial illnesses.
Until that moment much people died for illnesses that today, we find very simple.
Why doesn't the sea flood the earth?
Why doesn't the sea flood the earth?
We all know that the water covers 75% of the planet, the other 25% it is earth.
The oceanic level stays constant thanks to the continuous evaporation to the one that this subjected one the water of the seas.
However, if the temperature of the polar caps increases some grades, the ice there accumulated during thousands of years he/she would begin to melt.
This would cause an ascent of the level of the waters to you limit catastrophic for the humanity.
This is since one of the reasons for the one that we worry about the global heating so much, if this ended up happening it could be the humanity's end.
We all know that the water covers 75% of the planet, the other 25% it is earth.
The oceanic level stays constant thanks to the continuous evaporation to the one that this subjected one the water of the seas.
However, if the temperature of the polar caps increases some grades, the ice there accumulated during thousands of years he/she would begin to melt.
This would cause an ascent of the level of the waters to you limit catastrophic for the humanity.
This is since one of the reasons for the one that we worry about the global heating so much, if this ended up happening it could be the humanity's end.
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