Determination of Equilibrium Constants for Reactions between Nitric
... solution at 295.15 and 303.15 K, respectively. Therefore, values in or close to this interval can be evaluated by interpolation. With the corresponding equilibrium constants Kn (n = 1−6) and the dissociation constant of ammonium, the cobalt(II) ammonia system can be established. A detailed calculati ...
... solution at 295.15 and 303.15 K, respectively. Therefore, values in or close to this interval can be evaluated by interpolation. With the corresponding equilibrium constants Kn (n = 1−6) and the dissociation constant of ammonium, the cobalt(II) ammonia system can be established. A detailed calculati ...
Energy (eV) - Integrated Composites Lab
... nanoparticles formed of a single metal typically have block ing temperatures that are so loW that their practical utility is limited. It is knoWn that placing a shell around a ferromag netic core can increase the blocking temperature. Thus there ...
... nanoparticles formed of a single metal typically have block ing temperatures that are so loW that their practical utility is limited. It is knoWn that placing a shell around a ferromag netic core can increase the blocking temperature. Thus there ...
base hydrolysis of cobalt(iii)
... Fred, DMSO is not water." Fortunately, three years later Green and Taube(20), using ' 8 O-labeling in much the same experiment, showed it was not OH - that attacked the cobalt as required by an S N 2 mechanism, but instead the labeled-O in the product [Co(NH 3)3OH]2+ was derived from H 2 O. A few ye ...
... Fred, DMSO is not water." Fortunately, three years later Green and Taube(20), using ' 8 O-labeling in much the same experiment, showed it was not OH - that attacked the cobalt as required by an S N 2 mechanism, but instead the labeled-O in the product [Co(NH 3)3OH]2+ was derived from H 2 O. A few ye ...
A Library of Cobalt (III) Schiff Base Complexes for pH
... These results imply that the addition of a chloride substituent induced greater effect on the stability of the complexes than addition of a phenyl group. Previous computational studies have shown that substitutions made at the ortho/para position have a greater effect on the thermodynamic and kinet ...
... These results imply that the addition of a chloride substituent induced greater effect on the stability of the complexes than addition of a phenyl group. Previous computational studies have shown that substitutions made at the ortho/para position have a greater effect on the thermodynamic and kinet ...
Self-Subunit Swapping Occurs in Another Gene Type of Cobalt
... of metal ions into NHases is mediated by various ‘‘activator proteins’’ [1]. Fe-NHases require activators for functional expression in Rhodococcus sp. N-771 [24], Pseudomonas chlororaphis B23 [25], and Rhodococcus sp. N-774 [26]. A proposed metal-binding motif, CXCC, in the NHase activator of Rhodoc ...
... of metal ions into NHases is mediated by various ‘‘activator proteins’’ [1]. Fe-NHases require activators for functional expression in Rhodococcus sp. N-771 [24], Pseudomonas chlororaphis B23 [25], and Rhodococcus sp. N-774 [26]. A proposed metal-binding motif, CXCC, in the NHase activator of Rhodoc ...
(cobalamin)-dependent enzymes
... a unique, stable, covalent bond between the central cobalt atom of the coenzyme and carbon. One form, methylcobalamin (MeCbl), is involved in methylation reactions in which the methyl group is transferred to and from cobalt. The other form, adenosylcobalamin (AdoCbl), serves as a source of carbon-ba ...
... a unique, stable, covalent bond between the central cobalt atom of the coenzyme and carbon. One form, methylcobalamin (MeCbl), is involved in methylation reactions in which the methyl group is transferred to and from cobalt. The other form, adenosylcobalamin (AdoCbl), serves as a source of carbon-ba ...
experiment 18: flame tests for metals
... Fireworks capture our attention with their beautiful colors and controlled explosions, both of which link directly to fundamental concepts taught in basic chemistry classes. The media resources featured in this lesson provide a visually rich way to tie together spectral chemistry, combustion, and th ...
... Fireworks capture our attention with their beautiful colors and controlled explosions, both of which link directly to fundamental concepts taught in basic chemistry classes. The media resources featured in this lesson provide a visually rich way to tie together spectral chemistry, combustion, and th ...
- Wiley Online Library
... partially participate in P14K function. In addition, residue Arg96, which is conserved among the self-subunit swapping chaperones (Fig. 2), was also changed to investigate any effect on P14K function. The purified mutant NHase encoded by AB-strepP(C-R96A) exhibited the same level of activity as the ...
... partially participate in P14K function. In addition, residue Arg96, which is conserved among the self-subunit swapping chaperones (Fig. 2), was also changed to investigate any effect on P14K function. The purified mutant NHase encoded by AB-strepP(C-R96A) exhibited the same level of activity as the ...
[Co(NH3)5H2O](NO3)
... The most extensively studied class of octahedral transition metal compounds are cobalt(III) complexes in which ammonia (or other neutral molecules, closely related to ammonia, called amines) occupy some or all of the six coordination positions. The (III) in the name is a way of indicating the +3 oxi ...
... The most extensively studied class of octahedral transition metal compounds are cobalt(III) complexes in which ammonia (or other neutral molecules, closely related to ammonia, called amines) occupy some or all of the six coordination positions. The (III) in the name is a way of indicating the +3 oxi ...
... an important role in the biological applications1.. It binds to different metal ions forming homonuclear and heteronuclear complexes of varying geometry. In addition, these complexes act as potential antimicrobial agents, catalysts2, anticancer agents, etc. The complexes have been found to show enha ...
CuCoFe
... This dataset is an analysis of an annealed Nickel superalloy, a common metal used in jet engine turbines. Understanding the formation of the precipitates during high temperature anneals allow engineers to develop even stronger alloys to further improve the strength of the material. PtMLF-1.wrl Plati ...
... This dataset is an analysis of an annealed Nickel superalloy, a common metal used in jet engine turbines. Understanding the formation of the precipitates during high temperature anneals allow engineers to develop even stronger alloys to further improve the strength of the material. PtMLF-1.wrl Plati ...
Cobalt Threshold Fact Sheet
... (150 µg/mL). This is equivalent to around 98 µg/mL of cobalt. The manufacturer’s recommended dose rate in dogs is 0.25-1mL per 10kg bodyweight, twice weekly, administered orally. Dose administered: 1mL/10kg, administered orally on two occasions on alternate days (6 dogs). This is equivalent to a dos ...
... (150 µg/mL). This is equivalent to around 98 µg/mL of cobalt. The manufacturer’s recommended dose rate in dogs is 0.25-1mL per 10kg bodyweight, twice weekly, administered orally. Dose administered: 1mL/10kg, administered orally on two occasions on alternate days (6 dogs). This is equivalent to a dos ...
Cobalt Biology Discussion - 1-29-15
... It has been shown that the structural elements of Cbl-resembling corrinoids are found to selfassemble under structurally appropriate preconditions, including the A/D-ring junction and arrangement of double bonds of the corrin ring (Eschenmoser, 1988). A primitive structure of corrin stabilized by h ...
... It has been shown that the structural elements of Cbl-resembling corrinoids are found to selfassemble under structurally appropriate preconditions, including the A/D-ring junction and arrangement of double bonds of the corrin ring (Eschenmoser, 1988). A primitive structure of corrin stabilized by h ...
Magnetism - HouseWscience
... A force of attraction (Pull) and repulsion (Push) Domain:region where atoms are aligned In a magnet most domains are aligned The more domains that are aligned, the stronger the magnet ...
... A force of attraction (Pull) and repulsion (Push) Domain:region where atoms are aligned In a magnet most domains are aligned The more domains that are aligned, the stronger the magnet ...
82 Letter to the Editor M. Thevis1, 2, O. Krug1, 2, T
... as HIF stabilizers are prohibited in sports according to the Prohibited List [17] established by the World Anti-Doping Agency (WADA). Among the listed HIF stabilizers, organic (e. g. FG-4592) as well as inorganic compounds such as cobalt are exemplified. To the best of the authors’ knowledge this is ...
... as HIF stabilizers are prohibited in sports according to the Prohibited List [17] established by the World Anti-Doping Agency (WADA). Among the listed HIF stabilizers, organic (e. g. FG-4592) as well as inorganic compounds such as cobalt are exemplified. To the best of the authors’ knowledge this is ...
Discontinued Use of Chemicals - Department of Education and Skills
... and all other chromium(VI) compounds; Cobalt(II) Chloride, Cobalt(II) Nitrate and all other Cobalt(II) compounds; any other chemically related compounds. The use of cobalt chloride paper should also cease. ...
... and all other chromium(VI) compounds; Cobalt(II) Chloride, Cobalt(II) Nitrate and all other Cobalt(II) compounds; any other chemically related compounds. The use of cobalt chloride paper should also cease. ...
Low-cobalt diet for dyshidrotic eczema patients - PIEL
... Of particular interest, cobalt ingestion causing systemic allergic dermatitis in the form of dyshidrotic eczema. Dyshidrotic eczema is a type of chronic intermittent dermatitis that affects the hands and feet. Symptoms include pruritus and a burning sensation that may precede the development of vesi ...
... Of particular interest, cobalt ingestion causing systemic allergic dermatitis in the form of dyshidrotic eczema. Dyshidrotic eczema is a type of chronic intermittent dermatitis that affects the hands and feet. Symptoms include pruritus and a burning sensation that may precede the development of vesi ...
Zhang, Yajie. Cobalt. KNH 413 – Medical Nutrition Therapy II. Miami
... synthesized from dietary metal. Therefore, it is the vitamin B12 content of foods and diet, rather than the ionic cobalt present, that is important in human nutrition. There have been reports regarding the dependency of certain enzymes on cobalt as an activator or on the metal’s ability to substitut ...
... synthesized from dietary metal. Therefore, it is the vitamin B12 content of foods and diet, rather than the ionic cobalt present, that is important in human nutrition. There have been reports regarding the dependency of certain enzymes on cobalt as an activator or on the metal’s ability to substitut ...
here
... contains the highest level of Co, with molluscs and crustaceans, and dried fruit and nuts also containing the high levels in comparison to other foods. Other studies show different Co levels for the same products in neighbouring countries (e.g. coffee levels as reported by Ostapczuk et al. 1987), an ...
... contains the highest level of Co, with molluscs and crustaceans, and dried fruit and nuts also containing the high levels in comparison to other foods. Other studies show different Co levels for the same products in neighbouring countries (e.g. coffee levels as reported by Ostapczuk et al. 1987), an ...
Cobalt in Food (February 2006) This is a short article on the
... Co, with molluscs and crustaceans, and dried fruit and nuts also containing the high levels in comparison to other foods. Other studies show different Co levels for the same products in neighbouring countries (e.g. coffee levels as reported by Ostapczuk et al. 1987), and even within the same food ty ...
... Co, with molluscs and crustaceans, and dried fruit and nuts also containing the high levels in comparison to other foods. Other studies show different Co levels for the same products in neighbouring countries (e.g. coffee levels as reported by Ostapczuk et al. 1987), and even within the same food ty ...
Cobalt
Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt in the Earth's crust is found only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.Cobalt-based blue pigments (cobalt blue) have been used since ancient times for jewelry and paints, and to impart a distinctive blue tint to glass, but the color was later thought by alchemists to be due to the known metal bismuth. Miners had long used the name kobold ore (German for goblin ore) for some of the blue-pigment producing minerals; they were so named because they were poor in known metals, and gave poisonous arsenic-containing fumes upon smelting. In 1735, such ores were found to be reducible to a new metal (the first discovered since ancient times), and this was ultimately named for the kobold.Today, some cobalt is produced specifically from various metallic-lustered ores, for example cobaltite (CoAsS), but the main source of the element is as a by-product of copper and nickel mining. The copper belt in the Democratic Republic of the Congo and Zambia yields most of the cobalt mined worldwide.Cobalt is primarily used as the metal, in the preparation of magnetic, wear-resistant and high-strength alloys. Its compounds cobalt silicate and cobalt(II) aluminate (CoAl2O4, cobalt blue) give a distinctive deep blue color to glass, ceramics, inks, paints and varnishes. Cobalt occurs naturally as only one stable isotope, cobalt-59. Cobalt-60 is a commercially important radioisotope, used as a radioactive tracer and for the production of high energy gamma rays.Cobalt is the active center of coenzymes called cobalamins, the most common example of which is vitamin B12. As such it is an essential trace dietary mineral for all animals. Cobalt in inorganic form is also an active nutrient for bacteria, algae and fungi.