Single skin - Traffic and VI holes - pores and hair
Small holes. Small holes that allow the grain to characterize organic materials and non-organic, but which are not present in all types of materials. The extent of non-contiguous surfaces leaving them void is a pore material. Each pore is an opening, a hole, a gap, a crack, a stoma, a passage, an outlet, a channel or outlet channel leading to the heart of a material and offering the potential to affect it. Although the same name, one can distinguish the pore space of more or less hidden, which may also be present on the surface of the material but go nowhere. Low this pore may have content qu'il loge et laisse circuler, le laissant ouvert aux attaques de l'environnement. Voici quelques exemples de
matériaux organiques poreux : bois, éponge, peau, etc;
non-poreux: la peau de certains batraciens, de pachydermes, etc;
matériaux inertes poreux: céramique, béton, pierre, brique, etc.; et
non-poreux : surface de latex, métal, verre, rodhoïde, etc. Une tapisserie de petits trous à l'échelle moléculaire, cellulaire, tissulaire, membranaire... qui échappent facilement à notre attention, sauf lorsqu'ils sont directement sous l'objectif d'une caméra, d'un microscope ou d'une plume, comme is the case here.
Like a doorway of fortification, potentially, every pore allows or blocks the transmission, reception, transit, exchange of chemical information, wavelike sensation, tactile, thermal, noniceptives distributed directly or by diffusion as molecules, ions, fluids, gases, or organic and non-organic. The transport of elements can be passively because of much smaller diameter than the pore itself, or actively by train or ship, a term designating a sequence of elements whose acoquinnage is necessary to cross the conditions of the pore.
ensues desorption, which allows different elements come off the train when the crossing "pore-sanctuary" complete. Appearance, rough texture or viscosity, chemical composition, internal and external pressure, penetration, fusion, diameter, volume, resilience, permeability, preferential flow influenced by gravity, the attractive forces or electro-conductivity, are all considered when analysis closely. The pore function is filtration; metabolic transformation, protection against aggressive chemical, microbial and radioactive External thermoregulation by sweating and vasoconstriction, and émonction or excretion of waste. Another function is absorption. In seeking to realize the passage of fluid materials through living tissue, the first thing that comes is the presence of pores, however, the pores do not have this function
per se, and fluids pass rather in the gaps that leave them the material molecules. So when we are in a bath, the skin moistened absorbs a significant amount of water and if deposited on the surface of a wound poison, its impact is obvious as soon as he was absorbed. The absorption, one that is conceived in error, therefore, largely a phenomenon of imbibition or endosmosis (out-> in).
absorption, that carried through the pores of organic material is controlled. Not just anybody, anyhow, in any sense, for any reason. While we see holes, easy to invade these spaces are less marketable than it seems, these areas help to consolidate it, they act as portals or even customs! Even in the case of the living sponge constantly traversed by water, there are pores ostia to inhale water, pore oscula to exhale, the work of filtering to keep his food and reject seawater regenerated. Regulated. The pore tends to be shaped by the nature, amount of information, management (in-> out, out-> in, bi) and speed of traffic passing through it. These factors vary according to the physical location of the pore, its size and type of material or molecular cluster which it is made. Large differences exist between such
nuclear pores found at 3000 to 5000 per core, and the air
pores, the pore sponge
, les
pores de champignons , les
porosités des matériaux inertes , les
canaux ioniques ...
Les atomes sont les éléments de base de toutes les constructions chimiques. Les réactions se produisent entre atomes sous forme d'ions et engendrent les molécules. Les molécules s'assemblent en cellules, cristaux ou particules amorphes difformes pour constituer les matériaux. La colonne vertébrale de la chaîne moléculaire des matériaux organiques est faite de carbones avec liaisons latérales d'hydrogène, de carbone, d'oxygène et d'autres éléments. Elle offre une géométrie parfaitement régulière et uniforme micro-elements, links and / or micro-structures in the shape and arrangement. This fact is also observed in some inert materials. Thus, in organic matter, the number of pores is predetermined. Thus we also consider that the disorder is characteristic of organic
pathos, disease.
INSIGHT
I remember my surprise and fascination when for the first time after our birth, I looked around my kids: not only he was not lacking fingers or toes to the baby, but after more eight hours of regular work, shaken by strong pushed him being pressured from all sides, not one hair on his furry little body (lunago) will be crossed! Rosettes absolutely perfectly well appointed and designed with wonderful scrolls, scoured the skin all over his body and married each bastards at the corners of its members ... And I looked at everything very closely. Nowhere was there appearance of disorder. It came the idea that I deeply indelible responsibility of a new being, functional and in good standing, and therefore, incumbent upon me the responsibility of maintaining that order to the best of my knowledge. It was my responsibility to make it last time though happens, as long as possible. My responsibility was to educate this responsibility. As in sailing, I sailed our lives left, right, and sometimes even backwards, without ever losing sight of the anchor to the horizon.
Human skin is punctuated by pores. The pores of the skin of the face are those that are most noticed. Historically, companies feed the cult of beauty. Complexion perfection bright, brilliant, was a flirtation legitimized by the culture through the ages. This attention has become obsessed with the advent of photographic retouching fashion magazines that blur and high-definition television that outrageously put in evidence. To display a smooth facial skin, the pores should be clean and closed, the skin taut and firm. It is the prerogative of youth, you say ... Not quite! Genetics has something to say, oily skin seem to inherit larger pores, whereas they are barely visible on the dry skin. Oily skin and blackheads due to excess sebum often go together, they can increase the diameter of the pores or just attract attention by their explosive color. Environmental stresses such damage due au soleil, et le vieillissement entament la qualité juvénile de l'apparence tant recherchée. Le manque d'exfoliation ou la présence des dépôts d'huiles et de peaux mortes peuvent contribuer à augmenter l'apparence dilatée des pores. Il existe aussi des différences raciales naturelles: les peaux asiatiques ont les plus petites pores et on observe les plus grands dommages aux pores de la peau sur les visages africains américains. Pour la peau du corps, la meilleure cure c'est la mer, ses boues et son vent, car ils sont riches en minéraux et oligo-éléments. Chauds, ils provoquent la dilatation des pores du corps qui absorbent les ions négatifs à grand bol. Nettoyage, exfoliation, massage, raffermissement and regeneration are at the rendezvous. That's why it is so beautiful in the return of summer vacation!
The
pores are coming to the surface of the skin sweat glands is said merocrine, that is to say that does not destroy the same time as their secretion (sweat) and sebaceous glands is said holocrine, that is to say that destroying as and when their secretion (sebum). These are girdled in the dermis. It is the sympathetic nervous system (autonomous), which regulates perspiration. These are millions of sweat glands that produce the most de la transpiration et on en reconnaît deux types: eccrines et apocrines.
Les glandes eccrines bien que répandues sur tout le corps sont plus nombreuses dans la paume des mains, la plante des pieds, les aisselles, le front et la poitrine. Elles sont susceptibles d'être suractivées par le stress, l'anxiété, la peur et certains médicaments contenant de l'acétylcholine ou de l'adrénaline et de provoquer des sueurs froides très importantes. En général, elles synthétisent une sueur aqueuse et salée qui a un pouvoir bactéricide, thermorégulateur et hydratant. La composition de la sueur est dépendante de l'alimentation et de l'état général de l'individu. Comprising less concentrated blood which has passed through the cells of sweat glands and then be released outside the body, it is normally acidic. It is composed of 99% water and contains minerals and waste of vitamin C, antibodies, urea, uric acid, ammonia, lactic acid (which draws mosquitoes) and drugs. There are specialized pores that operate similarly and exhale transudation needed for vaginal lubrication ...
Among the apocrine glands, sebaceous glands, attached to the hairs, are active during fetal life because the sebum secreted is the
casensa varnish flaking skin and makes lunago (another name for fetal hair) protecting baby's skin. Sebum is a substance rich in fats used to lubricate the hair and brings to the stratum corneum - the outermost layer of skin - moisturizing and waterproofing. The mammary glands are also apocrine. They secrete liquid lipid in breast milk production. The apocrine resume their function in adolescence in some regions: the head, groin, underarms, nipples, anus and genitalia. These glands are very important in morals and social life of mammals because they contribute to the formation of body odor reveals the identity, territory, state, intent and mood. Humans do not seem to know what to make of this natural feature. Repression of odors by antiperspirants, soaps and scented perfumes specialization testify. Our manners now seem simulated, extrapolated or rationalized according wills and private property.
INSIGHT
First time that I approached e my nose with my new-born, first sniffed, there was no doubt: it was mine. She breathed the acrid smell that even his father. I perceived a slight difference, sweeter, lighter, but there could be no doubt it came from the same "kind". The experience of the nursery I was not reassured, with all the babies crying, all the nurses who touched the babies, I could hardly believe that I would recognize on sight and I was afraid that I am assigned the baby of another. I do not quite tolérais distance p hysical us. Despite the fatigue, I felt my senses sharp so hyper-realistic, now I felt equipped with a radar concentric lines a few feet in diameter at sentencing. I had the feeling within the area of my radar. Literally. Reassuring me that the smell is there, it's still happening today. My daughter and her father are the only two people I know that smell emanating particularly astringent to my nostrils. I'm not talking about bad smells but a particular imprint ... recognizable. And this feeling of radar, although qu'altérée by time, is still active in my face and offspring can not be extinguished.
There is no need to feel the
phéromones pour y réagir. Il faut juste y être exposé, même à très grande distance. Depuis la fin du 19e siècle, les
phéromones et leurs actions sont étudiées chez les végétaux, les insectes, les poissons et les mammifères. Chez les humains, on en a identifié quatre types: les primaires, les libératrices, les modulateurs et les signaleurs. Les glandes apocrines et les exhalations corporelles tel le souffle les émettent. Hormones de la communication, elles engagent à des actions particulières: choix d'un partenaire sexuel différent de soi, perception de personnes symétriques à soi, l'excitation sexuelle, la perception de la position in the menstrual cycle, the synchronization of menstrual cycles among women in a group, mutual influence of hormone levels of the other sex; awareness of certain types of pheromones rather than others, the perception of fear etc.. Children emit head. This explains why mothers nose dive regularly in the hair of their little ... And dope literally pheromones!
The hair also plays a social role. A hair consists of a rod of keratinized cells and root implanted in the thickness of the hypodermis by the hair bulb with dependence as the sebaceous glands in the dermis. There is an intertwining of small nerve fibers around each hair follicle forming the plexus of the hair root. This makes possible an extremely small sensation at the slightest movement or tactile impression of the hair. Also, a small muscle cell, muscle of hair arrector if contracts as a result of fear, fear, excitement, electricity, a pointed instrument, tickling or an external application of cold, straightens the hair and a small mound of skin to form the goosebumps or shivers.
This same mechanism allows the production of heat and protection against cold creating activity in all layers of the skin throughout the body. In humans, there are invariably the same number and the same location, and hair follicles that results. The human hair is more or less abundant within a population, but the presence of hair in the armpits and genitals is constant. The pores of the face are in fact from the pores of hair. The differences can be seen in humans comes from the influence of testosterone essentially giving rise to variations of hair type. The presence of hair has long been considered a symbol of sexual maturity, manhood, masculinity, wisdom, and fertility. Once again, the values of society seems to reject ensure appearance for the hairy look beardless Teens: yearning for eternal youth?
Of
hair, there are over 120 000 over our heads, and they grow in concentric zones at a rate of one centimeter per month. In an adult, it gives a dozen miles of hair per year. We normally lose one hundred to fifty cent à hairs per day. Each follicle has a potential to shoot a couple of hair, each with an average three-year cycle life in men and 4.7 years in women. Keratin, a fibrous protein substance and lasts from dead cells, is the main component of hair. These are the melanins derived from the amino acid tyrosine, which give the color of the hair. Hair is nourished by the blood through small blood networks at its root. The life cycle of hair: anagen (new hair), catagen (makes room for a new hair), telogen (A new hair grows at the base of the first.) And falling (Bye! Bye! My Cowboy !) occurs only two or four months after the death of the hair. Against the grain: alopecia, baldness, hirsutism, xérasie, trichomes, hair cracks, canities. When the scalp gets a makeover, it removes dead skin. Sometimes these cells grow or film and multiply abnormally. Here you are stuck with a problem of dandruff: they will be dry or oily. The dry films are very small and light, they fall off the hair as it snows. A dry film also indicates a dry scalp. Oily dandruff are large and heavy because they are soaked in oil. Iron deficiency, chemotherapy, cholesterol, contraception, diabetes, maternity, drugs, menopause, stress, thyroid disorders can all interfere with the health of the hair. Emotional shock can blanch the head or losing hair.
The impact of nutrition on our health of the hair is well known. The two families of acids and alkalis in our diet included a daily intake of protein, fat, vitamins, carbohydrates, minerals and trace elements are naturally neutralize each other to maintain the pH balance and renew the body properly. Turns a symbol of strength, seduction and fertility, reflecting the social status, nobility and power, set Trophy as the scalp, for tonsure and depraved losers or those who are close to God, by way of humility. The hairstyle is a brand identity. Wash, and moisturize hair cut is an extremely intimate and regenerating. It certainly seems to be a link between clarify, restore order in the ideas and restore order in the shape of her hair. This may explain the traumatic experiences when a hairdresser spleen, misses, do not follow the instructions and violated the trust of his client. Our appearance is one of the landmarks of our identity, for ourselves and for others. For Egyptians
in care was a prelude to love. For cancer
: it costs about $ 1 200 and twelve of our donations untreated hair of 20 and 30 inches long make one wig child sewn by hand. See how it treats the hair
Art.
study pore helped create very important applications in material sciences and health sciences. In robotics, creating
sensitive skin or "E-Skin
" to have the sensation of touch has applications in the real world and virtual. In health,
nanometer pores has several landmarks. Nanopores can find
serving the diagnostic - artificial nanopores of cells that serve as biosensors for ultra-sensitive detection of proteins identified as markers of disease at their early stages. We find the irreversible electroporation
care - electrical pulses of the order of a microsecond for creating nanoscale holes in the membrane minimally invasive tumor cells without affecting surrounding tissues such as blood vessels. There is a range of application in the drug delivery
: drogues en poudre; système de livraison des drogues; mélanges hydrophobe et hydrophile; membranes de dialyse; poudres cosmétiques; matériau de coagulation du sang. Dans un autre registre, en santé, on s'inspire des pores pour créer des
tapis de fibre pour la culture de tissus et d'organes; et si on en affuble la
peau artificielle ceci améliore grandement le succès des greffes pour blessures et brûlures. Mais encore, il y a la mise au point d'
expandeurs de peau pour recouvrir de très grandes surfaces suite à l'ablation de naevus.
INSIGHT:
Du plus loin que je me rappelle, les BAND-AIDS are perforated to mimic the pores ... because it allows the wound to breathe and heal faster!
Another area where the pores are of importance is the identification by fingerprints
. It is estimated that the fingerprints begin to form around the 13th week of pregnancy. The convolutions of peaks giving them their characteristic design will depend on many factors, such as speed of growth of the fingers, feeding the fetus, blood pressure, etc..
Not only individual but also each finger has its own footprint. Even the fingerprints of twins, though very similar, under scrutiny, also have differences. They are classified mainly into three groups: the arch, whorl and loop. Many other features are observed: the overall design of flood peaks and the frequency peaks, the location and position of specific points according to the nuclei and the differences between the elements, the type of items they are scars, forks, islands and / or spaces, the direction and the location of anchor points and the number of ridges between two such points, and location of pores. These drawings are persistent throughout life. Each time a person touches something, it leaves a footprint: the sweat pores along the ridges of skin fingertips leave a trail. These pores secrete exocrine permanently beads of sweat and it is impossible not to leave an impression. Sweat is made up of about 99% water. When it evaporates, it leaves traces of salts, amino acids and fats. Researchers use powders and chemicals such as iodine and silver nitrate to reveal fingerprints. A new method using a laser beam, is still at an experimental stage. Although identification by fingerprints is still disputed in the legal arena because their individuality was not established beyond a doubt she is the most used of all the biometric measurements of identity. It raises the question of the reliability of the correspondence between two fingerprint images based on an algorithm of probability of the presence of many minute details at the same time: there may be false similarities, the validity seriously degrades with the presence of noise as dirt, plaster or even the practice of fingerprinting may be the source of these noises, the performance of automatic systems are far from the theoretical possibilities of correspondence; and automatic use for now that some of the details of an imprint and could use together to strengthen the evidence. Criminals have long tried to erase the dermal ridges of their fingers, even with acid. But the prints have the annoying habit of reform and reappear intact with their original design! A chronic dermatitis, may occur in workers exposed to X-rays could happen to erase fingerprints and fingers make healing very difficult - but this is literally life or fingerprints! A
tattoo is a drawing in ink or some other pigment, usually decorative or symbolic, indelible, under the skin. These are pores that facilitate the attachment of a tattoo. To create a good tattoo, it is preferable that the pores are flexible, because if too hardened by firming creams for example, it becomes difficult to insert the needle and apply the correct color pigment.
This is not a trivial matter on the part of the tattoo: it involves not only the health of the tattooed person, but also his physical integrity, while requiring considerable technical skill and artistic. The tattoos were first used for medicinal and are always used - among other things as marking in radiotherapy. They have now become fashionable items. Their usefulness in forensic suits, the group identity, as a supplement, cosmetic, rite of passage, religious ritual, incantation or magic of artistic expression itself. Sometimes tattoos are imposed and violate the sanctity of individuals as the numbering of Jews during the second world war. It is strongly recommended for people with hemophilia, diabetes, AIDS, hepatitis B or C, eczema, epilepsy, or have allergies to products used as inks, pigments, latex ... or having keloid scars, as medical drugs, cardiovascular disease, or pregnant, as all persons under frequent changes of weight because this affects the appearance of the pattern. Wearing a pacemaker may interfere with the magnetic waves of dermograph. Because a healing process is concerned, there is a risk of infection by micro-organisms, or allergic reactions. There is a risk of scarring disease on individuals who are predisposed. At the time of healing, it is important not to use too greasy ointments or viscous, or alcohol intake, whether for consumption ou en application, au risque de diluer la colorisation des pigments à la surface du pore et d'affecter le tatoo. Enfin, il n'est pas avisé aux adolescents qui n'ont pas fini de maturer physiquement et psychologiquement de se faire tatouer car ils ne sont pas toujours en mesure de concevoir la conséquence et la permanence de leur choix bien qu'un tatoo soit réversible. Une technique au laser éclate les particules de couleurs sous la peau leur permettant de s'évacuer par les pores de la peau. C'est un processus qui peut être long et laisser des traces selon la qualité et la quantité d’encre utilisée, la couleur, la profondeur du tatouage et la nature des pigments, les pigments acryliques étant les plus récalcitrants. Colors such as yellow and green are also more difficult to remove and require a special intervention from the doctor. Surgery is more invasive and inevitably leave traces.
On the posterior third of the tongue of man, there are about 10,000 taste pores in hollow hidden from July to December papillae by which, with the help of olfaction, is assessed, tested, tasted the flavor, but also their chemical composition. Taste the assess palatability, toxicity and can identify foods that fit the nutritional needs its host. For cons, the taste is also influenced by experience and learning from each. The taste stimulates the salivary secretions, gastric and pancreatic digestion of specific foods, not to mention a feeling of well-being and satiety. Other types of taste buds perceive the texture of food. The porosity of food is linked to a protein network and fat globules in the food materials. They are found in cheese, cakes, breads, pancakes, pudding, etc.. Gluten is a substance of the bread wheat protein. Inter-mixed with the starchy endosperm of the grain, that the carbon dioxide produced during fermentation is trapped in the dough to make bread porous and spongy. In cheese, the fat globules are surrounded by cavities, pores. The flexibility of cheese is associated with a high porosity. In the preparation of a good espresso, coffee cake in the machine must be porous enough to allow the filtration of water and pulled up the flavor.
Pores ... their countless suggests they are everywhere, yet, but ... they are permanently living and inert structures that underlie the formation of the universe. And if I gives free my inspiration ... Black holes in space do they recall does not include pores? In their proximity, gravity and velocity of flight,
their crossing is possibly facilitated by the electro-conductivity ... An event horizon or visible surface marks the boundary of the hole. The gravitational attraction becomes stronger gradually as one approaches the center of the hole, giving the impression of being stretched and even torn in the passage of power by force, so that we project the other side. And its counterpart, the white hole which seems contrary current and prevent it from there ... This evokes nothing you? No idea? A black hole?