Monthly Archives: July 2008

30 07, 2008
  • Permalink Gallery

    Selective extraction, separation, and identification of anthocyanins from Hibiscus sabdariffa L. using solid phase extraction-capillary electrophoresis-mass spectrometry (time-of-flight /ion trap).

Selective extraction, separation, and identification of anthocyanins from Hibiscus sabdariffa L. using solid phase extraction-capillary electrophoresis-mass spectrometry (time-of-flight /ion trap).

By |July 30th, 2008|Publicacions|0 Comments|

Segura-Carretero A, Puertas-Mejía MA, Cortacero-Ramírez S, Beltrán R, Alonso-Villaverde C, Joven J, Dinelli G, Fernández-Gutiérrez A.

Source
Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Granada, Spain. [email protected]

Abstract

A method for selective extraction using SPE, electrophoretic separation at basic condition and the identification by using exact masses and fragmentation patterns has been developed in order to know the anthocyanins in dried calyces of Hibiscus sabdariffa L. A detailed and comparative study of several extraction procedures has been carried out to obtain the maximum number of anthocyanidins from the calyces and then a CE-TOF-MS method in positive mode using ESI has been developed for the separation and rapid identification of anthocyanins in H. sabdariffa L. Delphinidin-3-sambubioside, cyanidin-3-sambubioside have been detected as main components and cyanidin-3-O-rutinoside, delphinidin-3-O-glucoside and cyanidin-3,5-diglucoside, […]

30 07, 2008
  • Permalink Gallery

    Immunohistochemical analysis of paraoxonases-1, 2, and 3 expression in normal mouse tissues.

Immunohistochemical analysis of paraoxonases-1, 2, and 3 expression in normal mouse tissues.

By |July 30th, 2008|Publicacions|0 Comments|

Marsillach J, Mackness B, Mackness M, Riu F, Beltrán R, Joven J, Camps J. Source Centre de Recerca Biomèdica, Hospital Universitari de Sant Joan, Institut d’Investigacions Sanitàries Pere Virgili, Universitat Rovira i Virgili, Reus, Spain. Abstract The paraoxonase (PON) enzyme family, comprising PON1, PON2, and PON3, are antioxidant enzymes that degrade oxidised phospholipids. We describe the immunohistochemical localisation of the PON proteins in the normal mouse. Antibodies were obtained by inoculating rabbits with peptides derived from specific sequences of mature PONs. PON1 and PON3 were detected in the skin external epithelium, acini of the sebaceous glands, tongue epithelium, acini of the submandibular gland, surface epithelia of the stomach and the intestine, hepatocytes, exocrine pancreas acini, […]