Formation of structure of TiNiCu alloys with high copper content upon producing by planar flow casting

The oxygen consumption and the content of Ca, Cu, K, Sr, Zn, Fe, P and Mg was determined in several terrestric isopods. Porcellio scaber, Syspastus brevicornis and the three species of Armadillidium investigated display significant differences in their calcium contents and there is an inverse relationship between the latter and the oxygen consumption of the animals at 20 °C. The Qo2 of S. brevicornis is 13 ± 3.5 mm3/g/hr, the lowest ever recorded for a crustacean at 20 °C. The copper content of the isopods is high and suggests the presence of hemocyanin. It is highest in a population of P. scaber from Cornwall, England, where it amounts to approximately 0,1% of the dry weight of the animals. Most of the copper is present in the four hepatic tubules (hepatopancreas) which, in one sample from the population mentioned above, contained 1.4% copper, the highest value ever found in an invertebrate. The Qo2 of animals with more or less filled gut seems to be higher in the population with the high copper content, whereas in animals with half empty or empty gut the oxygen consumption is the same in the three populations of P. scaber studied.

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The Effect of High Copper Content on the Operation of a Lead Blast Furnace, and Treatment of the Copper and Lead Produced

JOM ◽

10.1007/bf03377432 ◽

1949 ◽

Vol 1 (5) ◽

pp. 347-348

Author(s):

A. A. Collins

Keyword(s):

Blast Furnace ◽

Copper Content ◽

Lead Blast Furnace ◽

High Copper ◽

High Copper Content ◽

Lead Blast

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Investigation of the Structure of MCM-41 Samples with a High Copper Content

Advanced Functional Materials ◽

10.1002/adfm.200305111 ◽

2004 ◽

Vol 14 (8) ◽

pp. 816-820 ◽

Cited By ~ 63

Author(s):

Y. Kong ◽

H. Y. Zhu ◽

G. Yang ◽

X. F. Guo ◽

W. H. Hou ◽

...

Keyword(s):

Copper Content ◽

High Copper ◽

High Copper Content ◽

Mcm 41

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Preparation and Characterization of High-Copper Restorative Dental Alloys Corrected

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.324.69 ◽

2011 ◽

Vol 324 ◽

pp. 69-72

Author(s):

Ziyad S. A. Al Sarraj ◽

Riyadh I. Atiyah

Keyword(s):

Copper Content ◽

Room Temperature ◽

Xrd Analysis ◽

Inert Atmosphere ◽

Dental Amalgam ◽

Spherical Particles ◽

Dental Alloys ◽

High Copper ◽

High Copper Content

A series of restorative dental alloys related to the ternary system Ag-Sn-Cu were prepared using high purity 99.99% elemental constituents. The effect of increasing the copper concentration on the micro-structural and mechanical properties of conventional dental amalgam alloy was investigated. Copper content was varied in the range of 10-30wt% and that of silver in the range of 40-60wt%, while tin percentage was kept constant between 28-30wt%. Selected desired compositions were weighed, melted, and homogenized for 1h in fused-alumina crucible using wire-resistance tube furnace at 1100oC under an inert atmosphere of argon gas. Two types of alloys were prepared, the first one was by quenching in water the alloy melt from a peak temperature of 725oC, while the second type was by slow furnace-cooling of the melt down to the room temperature. Annealing of the alloys at 350- 400oC for 24 hrs was also conducted to enhance the growth of the γ-phase. The resultant alloys were then cooled to room temperature (R.T) and milled mechanically to obtain a powder having particles sizes in the range between 30-80μm. The resultant powdered alloys was then stress-relieved at 100oC for 1h. XRD analysis, optical microscopy, micro hardness, and compression strength tests were all used for the characterization and properties determination at different Cu-concentrations for the as-prepared and amalgamated alloys in addition to the powders.. The obtained relative values for the above-mentioned properties were closely related to those listed in the literatures and lies between those of mechanically-milled and those of spherical particles. Also the γ2 – phase was disappeared at high copper content of > 20wt%.

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30. Observations on the Copper and Iron Content of Milk and other Dairy Products

Journal of Dairy Research ◽

10.1017/s0022029900000340 ◽

1931 ◽

Vol 3 (1-2) ◽

pp. 86-92 ◽

Cited By ~ 11

Author(s):

W. L. Davies

Keyword(s):

Heavy Metal ◽

Iron Content ◽

Dairy Products ◽

Copper Content ◽

Milk Product ◽

Point Of Entry ◽

High Copper ◽

High Copper Content ◽

Made In

The range of the copper and iron content of 80 samples of fresh, pasteurised and sterilised milk are given. Examples of investigations on the point of entry of copper into milk during processing are given. As a minimum limit, 1·5 p.p.m. of copper in milk can be expected to produce “oiliness” in milk.The copper content of dried milk is usually normal but the iron content is increased above that expected from the iron content of fluid milk.Cheese made in copper vessels has a high copper content; and the iron content of cheese is variable.Butter contains on an average about 0·5 p.p.m. of copper and 1 p.p.m. of iron. Factory made butter invariably contains more iron and copper.The more a milk product is processed, the greater is the contamination with heavy metal.An example of determining the amount of blood in milk by a determination of the iron content is given.

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