Search results for "Normal laboratory"
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First international descriptive and interventional survey for cholesterol and non-cholesterol sterol determination by gas- and liquid-chromatography–…
2019
International audience; Serum concentrations of lathosterol, the plant sterols campesterol and sitosterol and the cholesterol metabolite 5alpha-cholestanol are widely used as surrogate markers of cholesterol synthesis and absorption, respectively. Increasing numbers of laboratories utilize a broad spectrum of well-established and recently developed methods for the determination of cholesterol and non-cholesterol sterols (NCS). In order to evaluate the quality of these measurements and to identify possible sources of analytical errors our group initiated the first international survey for cholesterol and NCS. The cholesterol and NCS survey was structured as a two-part survey which took place…
Paramagnetic Mono- and Polyhydrides of the Transition Metals
2001
Publisher Summary This chapter reviews the methods used for the synthesis or generation of paramagnetic hydride complexes. It subsequently surveys the known classes of stable open-shell hydride complexes. The chapter also reveals the fundamental properties of the M–H bond in open-shell compounds and finally examines the various established decomposition modes. The classical picture of the terminal M–H bond is that where the hydrogen atom is orbital and combines with an appropriate metal-fragment hybrid orbital to generate the bonding and antibonding combinations. The chapter also elaborates the paramagnetic hydride complexes, which are thermally sensitive compounds and are unstable toward a…