Mineral Metabolism (Animal)

Gk, Davis; Jk, Loosli

doi:10.1146/annurev.bi.23.070154.002331

Cited by 12 publications

(9 citation statements)

References 66 publications

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“…Such changes to the surface generally lead to a separation of electrical charge and the formation of an electrical potential in reference to the bulk solution. [81] The surface charge can be organized into three categories: (1) permanent structural charge; (2) co-ordinative surface charge; and (3) dissociated surface charge. The permanent structural charge (s o ) occurs due to isomorphic substitution in minerals.…”

Section: Zeta Potentialmentioning

confidence: 99%

A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe₇S₈/ 5C – Fe₉S₁₀) in Ni‐Cu sulphide mineral processing

Multani

Waters

2018

Can J Chem Eng

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Pyrrhotite is one of the most abundant sulphide gangue minerals in base metal mining operations. It has little economic value and is a significant contributor of SO2 emissions at the smelting stage, thus it is rejected in most concentrators, requiring a concerted effort to ensure it is well separated from valuable minerals. The mineral processing of pyrrhotite is generally understood, however it has many complex crystallographic structures (superstructures) that behave differently in the flotation pulp for which the information is sparse and dispersed throughout the literature. Traditionally, the superstructures were largely isolated into magnetic/non–magnetic circuits and floated separately. Many operations have now transitioned away from magnetic separators, and treat the superstructures in the same flotation circuit where their flotation responses are quite different. Historically, it was perceived that the superstructures behaved virtually the same; whereas, recent work has clearly demonstrated that there are quantifiable differences in their flotation responses. The available information is scattered in the literature and is also plagued with many contradictions, making it very difficult for researchers to retrieve relevant information pertaining to the superstructures. This review aims to reduce the confusion by summarizing the superstructure nomenclature, characterization methods, aqueous stability, surface charges and superstructure‐reagent interactions, and available flotation data.

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Section: Zeta Potentialmentioning

confidence: 99%

A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe₇S₈/ 5C – Fe₉S₁₀) in Ni‐Cu sulphide mineral processing

Multani

Waters

2018

Can J Chem Eng

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“…Ferrihydrites (FeOOH, or "lIFO") are poorly ordered iron hydroxides that have been proposed to play an important role in the geochemistry of trace elements because of their reactivity and large specific surface area (Benedetti & Boul6gue, 1990;Davis & Kent, 1990). The interaction of gold hydroxo-chloro complexes with HFO's during coprecipitation experiments has been investigated by the means of MOssbauer spectroscopy (Benedetti & Boulegue, 1990;Davis & Kent, 1990;Greffi6 et al, 1996) but these studies were unable to assess the exact location of Au in these iron hydroxides. To determine the speciation of gold at the Fe-hydroxide-water interface, we have used x-ray absorption free structure (XAFS) spectroscopy at the Au-LII I edge to characterize Au-sorbed on HFO's as a function of pH, and chloride concentration of the solution.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Au on iron oxy-hydroxides using Au-L _III edge XAFS spectroscopy

Berrodier¹,

Farges²,

Benedetti³

et al. 1999

J Synchrotron Radiat

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“…dl-tetrahydrofolic acid was synthesized by reduction of folic acid in glacial acetic acid with sodium dithionate (12). dl-5,lO-Methenyltetrahydrofolic acid was prepared by acidifying 5:formyltetrahydrofolic acid (Leucovorin) (13), which was a generous gift from Lederle Laboratories.…”

mentioning

confidence: 99%

The Effect of dl-Methionine, Vitamin B12, and Thyroid Powder on Metabolism of Formiminoglutamic Acid in Rats

Batra¹,

Buehring²,

Stokstad³

1974

Experimental Biology and Medicine

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It has been reported in the literature that urinary excretion of formiminoglutamic acid (FIGLU) is increased in rats by vitamin Biz deficiency (1, 2) or by feeding thyroid powder (3). These results with thyroid may be explained on the basis that feeding thyroid powder induces vitamin BIZ deficiency (4, 5 ) which, in turn, produces a secondary folic acid deficiency (2) and thus results in a rise in urinary excretion of FIGLU. Also, it is known that administration of methionine either to vitamin BIZ deficient (1)-or to thyroid-fed rats (3) results in a rapid decrease in the excretion of FIGLU in urine.The addition of methionine to a vitamin B12deficient diet increases considerably the folic acid level of the liver (6), particularly the level of polyglutamate forms (7, 8). In studies with perfused rat liver, Buehring et al. (9) showed that the addition of methionine to the perfusion medium decreased the levels of 5-methyltetrahydrofolate and increased the levels of reduced forms of monoglutamates other than 5-methyl-tetrahydrofolate and also increased the polyglutamates. It was therefore of interest to look further into the relationship between vitamin BIZ, thyroxine, and methionine and study the effect of these compounds on the breakdown of FIGLU in liver homogenates.Materials and Methods. Diets. The composition of basal diet is as follows (g/kg): glucose monohydrate, 714; soy assay protein,z 200; mineral salt mixture (lo), 35; water-soluble vitamins premixed in glucose monohydrate, 10; corn oil with vitamins A, D, and E, 40; and choline chloride, 1. The vitamins were supplied in the following amounts (per kg): vitamin A

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Mineral Metabolism (Animal)

Cited by 12 publications

References 66 publications

A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe₇S₈/ 5C – Fe₉S₁₀) in Ni‐Cu sulphide mineral processing

A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe₇S₈/ 5C – Fe₉S₁₀) in Ni‐Cu sulphide mineral processing

Adsorption of Au on iron oxy-hydroxides using Au-L _III edge XAFS spectroscopy

The Effect of dl-Methionine, Vitamin B12, and Thyroid Powder on Metabolism of Formiminoglutamic Acid in Rats

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Mineral Metabolism (Animal)

Cited by 12 publications

References 66 publications

A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe7S8/ 5C – Fe9S10) in Ni‐Cu sulphide mineral processing

A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe7S8/ 5C – Fe9S10) in Ni‐Cu sulphide mineral processing

Adsorption of Au on iron oxy-hydroxides using Au-L III edge XAFS spectroscopy

The Effect of dl-Methionine, Vitamin B12, and Thyroid Powder on Metabolism of Formiminoglutamic Acid in Rats

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A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe₇S₈/ 5C – Fe₉S₁₀) in Ni‐Cu sulphide mineral processing

A review of the physicochemical properties and flotation of pyrrhotite superstructures (4C – Fe₇S₈/ 5C – Fe₉S₁₀) in Ni‐Cu sulphide mineral processing

Adsorption of Au on iron oxy-hydroxides using Au-L _III edge XAFS spectroscopy