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Wednesday, 28 January 2015

Bone Care

bonecare


Many people think first of all of calcium when it comes to doing something for their bones. And all too often, the bone Care exhausted in taking any calcium preparation or in excessive milk consumption. Strong bones, however, need a lot more than calcium. Worse! Who consumes much calcium can sometimes weaken the bones, instead of strengthening it.

Bones need magnesium

The organism builds bones are not limited to calcium. He needs to also a variety of minerals and trace elements such. As zinc, boron and copper. A particularly important for bone mineral is further

Comprises magnesium.

Calcium is effective only with magnesium
Magnesium is absolutely essential for many body functions. One of his most important roles is that of the co-factor for calcium. This means that calcium can only be properly utilized when magnesium is present.

Bones need vitamin K

Vitamin K is also actively involved in bone formation. It was under his influence can be formed in the bone protein osteocalcin that which binds calcium and is responsible for skeletal development.

Bones need sun

Vitamin D is for bone metabolism of paramount importance. With the diet, only a negligible fraction of the vitamin D requirement can be met.

But the human body is set up so that one hand he can make vitamin D with the help of sunlight in the skin itself and that he on the other hand has a memory mechanism that allows him theoretically to store vitamin D through the winter and therefore low light months. So anyone who wants to take care of an adequate and above all natural vitamin D supply that uses this natural sunlight - without sunscreen.

Visa to Study in Ireland

study at ireland


In this article you will find all the information you need about the visa to study in Ireland. This information is based on the experience of our students, staff and documents and government sources in Ireland. Always remember to visit the nearest embassy to your residence to confirm the last data.

The INIS, for its acronym in English Irish Naturalisation and Immigration Service, is the body responsible for monitoring compliance with the laws governing the Irish immigration system. Year after year this organization aims to improve the legal conditions of citizens who reside in Irish territory and those seeking to live permanently.

A group of Latin American countries that do not require the processing of visa to study in Ireland. They just need to meet certain requirements, including the completion of a registration once the person go to Ireland.

Students from the EU / EEA do not need a student visa to study in Ireland.

Tungsten

Tungsten


The metal tungsten [vɔlfram] is a chemical Substance with the symbol W and atomic number 74. It is a shiny white metal that is ranked among the transition metals. Tungsten has the highest of all pure metals, melting and boiling point.

In the 16th century Freiberg mineralogist Georgius Agricola described That, the occurrence of a mineral in Saxon tin ore, which greatly complicated the tin production by slugging of the tin content. Whether it acted to wolf ramite, is still controversial, as he spoke of the "lightness" of the mineral. He named the mineral lupi spuma, which translated from Latin means "wolf (s) foam" means. Later, from Wolf foam Wolfrahm. And finally came to the now famous words of tungsten.

The common word in English and French Tungsten derives (Swedish for "heavy stone") Tung Sten (calcium tungstate) from. In this realized in 1781, the Swedish chemist Carl Wilhelm Scheele, a hitherto unidentified salt. Pure tungsten was the first time in 1783 by the Spanish brothers Fausto and Juan José Elhuyar (who worked under the direction of Scheele) by decrease of tungsten trioxide, which is obtained from wolframite made.

The tungsten ores are first concentrated by flotation. Thereafter, the digestion of the ground ore with soda takes place by melting at about 800 ° C, or with sodium hydroxide solution under pressure (roasting), said first soluble sodium tungstate is formed. After precipitation and filtering off impurities, the sodium tungstate (Na2WO4 • 2 H2O) is converted with calcium chloride to calcium tungstate with hydrochloric acid to tungsten trioxide (WO3 * H2O) reacts, which is filtered off. By adding an ammoniacal solution forms a complex called ammonium para tungstate (APT). This is also collected by filtration and subsequently transferred at 600 ° C in relatively pure tungsten trioxide. By annealing to obtain tungsten (VI) oxide (WO3), which is reduced at 800 ° C under a hydrogen atmosphere to steel gray tungsten:

This process produces gray powder; this is frequently compacted into sintered electrically panels. At temperatures above 3400 ° C, in special electric furnaces with a reducing atmosphere of hydrogen a compact tungsten metal are melted (Zone melting process).

Theory Of Ionization

ionization


In fact, the ionization energy is the energy that you have to provide your atom (gaseous) to remove an electron.

The energies are predictable in order of size.

It is necessary to have in mind the electronic filling of OA 1s2,2s2,2p4,3s2 ...
after you have to know that a molecule (core) is very stable when it acquired a noble gas structure
or that its sub layers are saturated (filled)
Or then half filled.

So if you go from one atom X configuration there and you remove one electron that is, you take the config y -1 if this config corresponds to a state of stability, energy supply will be low because the atom + has facilities to arrive in this state while if you leave a stable atom and you're trying to ionize, the energy supply will be high.

Magnetic Field

megnatic


Magnetic fields are produced by electrical currents, which can be macroscopic currents in wires or tiny currents associated with electrons in atomic orbits. The magnetic field is defined in terms of the force exerted on moving charges in the law of the Lorentz force. Magnetic field interaction with the loads, leads to numerous practical applications. The sources of magnetic fields are essentially dipolar nature, having a north pole and a south magnetic pole.

The standard unit (SI) for the magnetic field is Tesla, that can be drive from the magnetic part of the law of Lorentz force, Fmagnética = qvB, which is composed of (Newton x second) / (Coulomb x meter). The Gauss (1 Tesla = 10,000 Gauss) is a unit of smaller magnetic field.

The magnetic quantity B which we call here "magnetic field", is sometimes called "magnetic flux density". The Weber per square meter is the ancient name of Tesla, being the Weber the unit of magnetic flux.