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Holmium is a relatively soft and malleable element that is fairly corrosion-resistant and stable in dry air at standard temperature and pressure.
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Holmium and is
Holmium ( ) is a chemical element with the symbol Ho and atomic number 67.
Holmium is found in the minerals monazite and gadolinite, and is usually commercially extracted from monazite using ion exchange techniques.
Holmium has the highest magnetic strength of any element and therefore is used for the polepieces of the strongest static magnets.
Holmium is paramagnetic at ambient conditions, but is ferromagnetic at temperatures below.
Holmium is quite electropositive and is generally trivalent.
Holmium obeys the Oddo-Harkins rule: as an odd-numbered element, it is less abundant than its immediate even-numbered neighbors, dysprosium and erbium.
Holmium is relatively inexpensive for a rare-earth metal with the price about US $ 1000 per kg.
Holmium has the highest magnetic strength of any element, and therefore is used to create the strongest artificially generated magnetic fields, when placed within high-strength magnets as a magnetic pole piece ( also called a magnetic flux concentrator ).
Holmium is used in yttrium-iron-garnet ( YIG )- and yttrium-lanthanum-fluoride ( YLF ) solid-state lasers found in microwave equipment ( which are in turn found in a variety of medical and dental settings ).
Holmium is one of the colorants used for cubic zirconia and glass, providing yellow or red coloring.
Whereas GreenLight relies on haemoglobin as a chromophore, water within the target tissue is the chromophore for Holmium lasers.
The penetration depth of Holmium lasers is < 0. 4 mm, avoiding complications associated with tissue necrosis often found with the deeper penetration and lower peak powers of Nd: YAG lasers used in the 1990s.
HoLEP, Holmium Laser Enucleation of the Prostate, is another Holmium laser procedure reported to carry fewer risks compared with either TURP or open prostatectomy.
* Laser thermal keratoplasty ( LTK ) is a non-touch thermal keratoplasty performed with a Holmium laser, while conductive keratoplasty ( CK ) is thermal keratoplasty performed with a high-frequency electric probe.
Holmium and element
Holmium has the highest magnetic moment () of any naturally occurring element and possesses other unusual magnetic properties.
Holmium ( Holmia, Latin name for Stockholm ) was discovered by Marc Delafontaine and Jacques-Louis Soret in 1878 who noticed the aberrant spectrographic absorption bands of the then-unknown element ( they called it " Element X ").
This makes Darmstadt one of only eight cities with an element named after it ( the other cities being Ytterby in Sweden ( four elements ); Stockholm in Sweden ( Holmium ); Strontian in Scotland ; Copenhagen in Denmark ( whose Latin name gives Hafnium ); Paris ( whose Latin name gives Lutetium ); Berkeley, California ; and Dubna in Russia ).
* Holmium, a chemical element
Holmium and fairly
Holmium oxide has some fairly dramatic color changes depending on the lighting conditions.
Holmium and air
Holmium metal tarnishes slowly in air and burns readily to form holmium ( III ) oxide:
Holmium and at
Holmium lasers emit at 2. 08 micrometres, and therefore are safe to eyes.
Holmium and .
Holmium was discovered by Swedish chemist Per Theodor Cleve.
Holmium plays no biological role in humans, but may be able to stimulate metabolism.
* WebElements. com – Holmium ( also used as a reference )
Another procedure termed Holmium Laser Ablation of the Prostate ( HoLAP ) has also been gaining acceptance around the world.
Both wavelengths, GreenLight and Holmium, ablate approximately one to two grams of tissue per minute.
Holmium and thulium are used in some very high power movie lighting models.
is and relatively
For both Plato and Aristotle artistic mimesis, in contrast to the power of dialectic, is relatively incapable of expressing the character of fundamental reality.
The relatively long and often colorful selections in this anthology enable the reader to become genuinely absorbed in what is said, whether he responds with anger or applause.
But the firm has recognized the tight dollar and the tourist's desire to visit the `` smaller, less-traveled and relatively inexpensive countries '', and is now prepared to teach modern Greek and Portuguese through recordings.
It is, in fact, a relatively mild chastisement of the dead.
But by comparison with the railroad, the motor car is a relatively new object of popular worship, so it is too much to hope that it may be brought within the bounds of civilized usage quickly and easily.
When towns have the same fiscal year it is relatively easy to make meaningful comparisons ; ;
Another recent achievement was the successful development of a method for the complete combustion in a bomb calorimeter of a metal in fluorine when the product is relatively non-volatile.
In the daytime, on the other hand, since skywave transmission is relatively inefficient, it is possible to assign a substantially larger number of stations on these channels.
Because the bobbin-to-cone winding process is a relatively high-cost operation for the mill, the almost complete automation provided by the Uniconer can mean important economies in textile production, at the same time upgrading quality.
It is relatively easy to go a step further and reason that an attacker, in possession of such absolute power, would simultaneously destroy his opponent's cities and people.
A relatively simple switching arrangement reverses the cycle so that the machine literally runs backward, and the heat is extracted from outdoor air and turned indoors.
Although the standard deviation values on which spread of the lines is based are relatively larger for those centers which begin to ossify early ( Table 1 ), there are considerable differences in this value between centers having the closely timed Onsets.
But even in relatively primitive laboratory animals such as the rat, sex activity closely identified with the hypothalamus and the visceral brain is enhanced by the neocortex.
The society is likely to be characterized by having a fairly modernized urban sector and a relatively untouched rural sector, with very poor communications between the two.
Related to this is the fact that most of the higher religions define for the individual his place in the universe and give him a feeling that he is relatively secure in an ordered, dependable universe.
Although the Brandywine population is still predominantly rural, `` there are indications of a consistent and a statistically significant trend away from the older and relatively isolated rural communities.
In the primary grades, reading permeates almost every aspect of school progress, and the children's early experiences of success or failure in learning to read often set a pattern of total achievement that is relatively enduring throughout the following years.
Spontaneity training theory is unique and relatively new.
However, there are relatively few such political constituencies, and, as has been pointed out, there is seldom a clear-cut distinction between the educational interests of one social class and those of another.
This relatively high value is probably due to the small fiber diameters increasing the number of internal reflections.
What is noteworthy about this large group of teen-agers is that, although their attitudes hardly differentiate them from their gentile counterparts, they actually lead their lives in a vast self-enclosed Jewish cosmos with relatively little contact with the non-Jewish world.
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