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Characterization of the Geographical and Varietal Origin of Wheat and Bread by Means of Nuclear Magnetic Resonance (NMR), Isotope Ratio Mass Spectrometry (IRMS) Methods and Chemometrics: A Review

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53433#.VMWoOizQrzE Author(s)   Francesco Longobardi , Daniela Sacco , Grazia Casiello , Andrea Ventrella , Antonio Sacco *   Affiliation(s) Dipartimento di Chimica, Università degli Studi di Bari “A. Moro”,Bari, Italy . ABSTRACT In recent years, food authentication, in terms of geographical and varietal/animal origins, is considered of primary importance at all levels of the production process. Therefore, it is clear that there is an economic basis to develop analytical methods able to certify the declared origin of food products, in order to protect consumers and honest producers from fraud and unfair competition, respectively; consequently, during recent years, several food authentication techniques have been proposed. This review attempted to present in a critical way the contribution of High Resolution Nuclear Magnetic Resonance (HR-NMR) and Isoto...

Hemoglobin S Polymerization Effect on Water Self-Diffusion Coefficient

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50363#.VDsv4lfHRK0 Author(s)   Manuel A. Lores Guevara , Juan C. García-Naranjo , Yulianela Mengana , Jorge Pereira Affiliation(s) Magnetic Resonance Lab, Biophysics and Medical Physics Centre, Santiago de Cuba, Cuba . ABSTRACT The transversal relaxation time, the effective transversal relaxation time and the water self-diffusion coefficient are evaluated during hemoglobin S polymerization. One homogeneous permanent magnet and one inhomogeneous and portable unilateral magnet with a very strong and constant static magnetic field gradient were utilized. The Carr-Purcell-Meiboom-Gill method was used before and after placing the studied samples 24 hours at 36°C...