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Control of lake trout reproduction: role of lipids (1998)

Aenderson, B. A. ; Wong, J. L.

Oxford, UK : Blackwell Publishing Ltd

Journal of fish biology 52 (1998), S. 0

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ISSN: 1095-8649

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Biology

Notes: Somatic lipid density of lake trout decreased during summer and increased after spawning in October, peaking April, prior to ovarian recrudescence. Non-lipid density increased from June or July until August and remained relatively constant until March. All lake trout (n=30) reared on high (n=10, 0·4%), medium (n=10, 0·15%) and low (n=10, 0·05%) rations from March to September spawned. In a second experiment for which the treatments commenced in November, the proportion of females maturing in the following October (high=88%, medium=69%, low=28%) was positively related to ration levels.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1095-8649.1998.tb00605.x

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Subspeciation of sulfidic nickel in particulates. Determination of Ni3S2, NiS2, and NiS in reference and fly ash samples by carbon paste electrode voltammetry (1999)

Wong, J. L. ; Liu, Anhua ; Tian, M. ; [et al.]

Springer

Fresenius' journal of analytical chemistry 363 (1999), S. 571-572

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ISSN: 1432-1130

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract Nickel speciation of fly ash by sequential extraction lacks specific identification of the chemical forms in the sulfidic nickel phase. A new voltammetric analysis of Ni3S2, NiS, and NiS2 in a carbon paste electrode is reported. Characteristic peaks were observed in acetate (pH 5) as the electrolyte; the anodic peak for Ni3S2 gave a linear dose response with microgram sensitivity. Reference compounds included heazlewoodite, millerite, commercial Ni3S2, NiS2, and NiS, but the latter was shown to be mainly the subsulfide. No Ni3S2 was found in two types of laboratory generated ash: an oil ash containing mainly soluble nickel and a high sulfur petroleum coke ash enriched with nickel.