Kategoria BISAC: Science >> Chemistry - Analytic

The derivation of structural information from spectroscopic data is now an integral part of organic chemistry courses at all Universities. Over recent years, a number of powerful two-dimensional NMR techniques (e.g. HSQC, HMBC, TOCSY, COSY and NOESY) have been developed and these have vastly expanded the amount of structural information that can be obtained by NMR spectroscopy. Improvements in NMR instrumentation now mean that 2D NMR spectra are routinely (and sometimes automatically) acquired during the identification and characterisation of organic compounds.

Organic...

1. Bericht uber Ruckstande von Pflanzenschutzmitteln in Lebensmitteln: Diese konnen ein gesundheitliches Risiko fur den Verbraucher darstellen. Die Einhaltung gesetzlich festgelegter Hochstgehalte wird daher von der amtlichen Lebensmitteluberwachung uberpruft. 2. Nationale Berichterstattung an die EU: Dieser Teil umfasst die Berichte uber die Kontrolle von Lebensmitteln auf Sudanrot, Nitrat, Ochratoxin A, Fusarientoxine, von Lebensmitteln aus Drittlandern auf Aflatoxine sowie die Kontrollergebnisse gema der Bestrahlungsverordnung. 3. Bundesweiter Uberwachungsplan (BUp): Die...

This open access book distinguished itself from other publications by offering step-by-step instructions on how to extract, purify, provide modifications, and major issues to be encountered during the process. For the δ¹⁸OP method to progress, further fundamental research as well as field and laboratory studies need to be conducted for a better understanding of P cycling in the environment.  Chapter 1 outlines the background and examples of δ¹⁸Op studies in sediments, soils, fresh water, mineral fertilizers, and plants. Chapters 2 and 3 examine the stepwise...

Precision and uniformity are indispensable when working with physical quantities, units and formula symbols. Only through unambiguous and authoritative notation is interdisciplinary cooperation possible. The book gives an overview of all common quantities and units, which are needed in studies and teaching as well as in everyday work. All printed quantities and units are currently valid and standardized in ISO/IEC.

The book includes:

_brief introduction to the development of the system of units

_overview on the system of quantities and units

_calculating...

This book highlights the analysis of new azimuth-independent methods of Stokes polarimetry and Mueller-matrix

reconstruction of distributions of optical anisotropy parameters using spatial-frequency filtering of manifestations of phase (linear and circular birefringence) and amplitude (linear and circular dichroism) anisotropy for diagnosing changes in the orientational-phase structure of fibrillar networks of histological sections of biological tissues and polycrystalline films of biological fluids.