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Refractory elements ( Sr, Y, Zr, Nb, Ba, La, Ce, Pr, Nd, Pm ) form oxides with high boiling points ; these precipitate the fastest and at the time of particle solidification, at temperature of 1400 ° C, are considered to be fully condensed.
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Refractory and elements
Refractory shapes made from fused silica have excellent thermal shock resistance and are chemically inert to most elements and compounds including virtually all acids, regardless of concentration, except hydrofluoric acid which is very reactive even in fairly low concentrations.
Refractory and with
* Refractory Concrete Information related to heat resistant concrete ; recipes, ingredients mixing ratio, work with and applications.
* Treatment-resistant depression ( or Treatment Refractory Depression ), a type of depression used to describe individuals diagnosed with major depressive disorder and do not respond to traditional forms of treatment ( namely, medication and psychotherapy )
The Steetley refractory works on Station Lane closed in the 1980s with half the site being redeveloped for housing while the remaining half was taken over by Intermet Refractory Products Ltd.
** () Refractory anemia with ringed sideroblasts
** () Refractory anemia with excess blasts
** () Refractory cytopenia with multilineage dysplasia
Refractory and high
Refractory metals such as tungsten and rhenium do not emerge from the target even at high temperatures due to their low vapour pressure.
Refractory materials must be chemically and physically stable at high temperatures.
Refractory and ;
Refractory / relapsed patients should have platelet counts of 100, 000 per cubic millimetre ( 100, 000 / cmm ) or greater ; consolidation patients should have counts of 150, 000 / cmm or greater.
Refractory and are
Refractory bricks are designed in several layers.
Refractory bricks are typically replaced every five years, because thermal fatigue gradually introduces fissures that reduce the insulating strength.
Refractory materials such as firebrick, castable refractories and ceramic fibre, are used for insulation.
Refractory bricks are often used as a lining, particularly if the type of fuel being burned generates flue gases containing acids.
Refractory loam, mineral sands, and chalk are quarried and processed in the region.
Refractory metals are a class of metals that are extraordinarily resistant to heat and wear.
Refractory materials are used in linings for furnaces, kilns, incinerators and reactors.
Some of the major refractory producers in the world are Siam Refractory, RHI AG, Vesuvius, Calderys, Magnesita, TRL Krosaki Refractories Limited, Minteq, and Refratechnik.
Refractory and .
Refractory cases ( such as diarrhea resulting from the complications of AIDS ) may require higher than normal dosing.
The EBT maintained a large dual-gauge yard and coal cleaning plant in Mount Union and supplied coal to the Refractory plants.
A Refractory Tower showing the differing weights of various products.
Refractory ITP ( ITP not responsive to conventional treatment ) may require splenectomy, the surgical removal of the spleen.
* Refractory — the cell has recently been excited and is temporarily not excitable.
Refractory metals and alloys attract the attention of investigators because of their remarkable properties and on account of promising practical prospects.
* X-wind, Refractory IDPs and Cometary Nuclei, 1999, in Proc.
* Refractory Specialties Inc.
Highlights for the manufacturer of refractory Ibar ( Brazilian Industry of Refractory items ) which was installed in Poá five years before the emancipation of the municipality, the maker of electrical cables Inducabos, and the Brazilian subsidiary of the multinational Aunde, which produces automotive fabrics.
Refractory production ceased in the area in the 1990s.
Refractory in sawing & mechanics moderately well.
elements and Sr
Due to the chemical similarity of the elements, the stable forms of strontium might not pose a significant health threat — in fact, the levels found naturally may actually be beneficial ( see below )-but the radioactive < sup > 90 </ sup > Sr can lead to various bone disorders and diseases, including bone cancer.
Rb and Sr are relatively mobile alkaline elements and as such are relatively easily moved around by the hot, often carbonated hydrothermal fluids present during metamorphism or magmatism.
They also tend to be slow rotators and have an effective temperature between 7000 K and 10 000 K. The Ap stars ( CP2 stars ) are characterized by strong magnetic fields, enhanced abundances of elements such as Si, Cr, Sr and Eu, and are also generally slow rotators.
These processes cause some elements, particularly He, N and O, to " settle " out in the atmosphere into the layers below, while other elements such as Mn, Sr, Y and Zr are " levitated " out of the interior to the surface, resulting in the observed spectral peculiarities.
This favors producing a melt rich in large-ion lithophile elements ( LILE ) such as K, Ba, Rb, Cs, Sr.
Boninites with 10-18 % MgO tend to have higher large-ion lithophile elements ( LILE ) ( Ba, Rb, Sr ) than komatiites.
elements and Y
If the domain is the real numbers, then each element in Y would correspond to two different elements in X (± x ), and therefore ƒ would not be invertible.
means " ƒ is a function mapping elements of a set X to elements of a set Y ".
The net is frequently in a subset Y of V if and only if for every N in N there exists some n ≥ N such that a < sub > n </ sub > is in Y, that is, if and only if infinitely many elements of the sequence are in Y.
Thus a point y in V is a cluster point of the net if and only if every neighborhood Y of y contains infinitely many elements of the sequence.
Multiple elements of X might be turned into the same element of Y by applying f.
These elements are yttrium ( Y ), erbium ( Er ), terbium ( Tb ), and ytterbium ( Yb ) and were first described in 1794, 1842, 1842, and 1878, respectively.
Furthermore, one atom of element X combining with two elements of Y or vice versa, is a ternary compound.
The set of injective functions from X to Y may be denoted Y < sup >< u > X </ u ></ sup > using a notation derived from that used for falling factorial powers, since if X and Y are finite sets with respectively m and n elements, the number of injections from X to Y is n < sup >< u > m </ u ></ sup > ( see the twelvefold way ).
By extension, the cross-covariance matrix between two random vectors X and Y ( X having n elements and Y having p elements ) is the n × p matrix
As a consequence, for convergence of a sequence of elements of it then suffices that the coefficient of each power of Y converges to a formal power series in X, a weaker condition that stabilizing entirely ; for instance in the second example given here the coefficient of Y converges to, so the whole summation converges to.
" The only symbolism in the flag is the V or Y shape, which can be interpreted as " the convergence of diverse elements within South African society, taking the road ahead in unity ".
An-tuple can also be regarded as a function, F, whose domain is the tuple's implicit set of element indices, X, and whose codomain, Y, is the tuple's set of elements.
On the second day, Brigadier " Shan " Hackett's 4th Parachute Brigade would arrive at DZ ' Y ', accompanied by extra artillery units and remaining elements of the Airlanding Brigade on LZ ' X '.
* Group 3 elements: scandium ( Sc ) and yttrium ( Y ) plus the Lanthanide and Actinide series elements.
0.691 seconds.