• 1
    Giovagnoni A, Fabbri A, Maccioni F. Oral contrast agents in MRI of the gastrointestinal tract. Abdom Imaging 2002; 27: 367375.
  • 2
    Yamamoto Y, Hasegawa H. Components of oral contrast agents for magnetic resonance imaging. Food Ingred J 1993; 158: 102119.
  • 3
    Hiraishi K, Narabayashi I, Fujita O, Yamamoto K, Sagami A, Hisada Y, Saika Y, Adachi I, Hasegawa H. Blueberry juice: preliminary evaluation as an oral contrast agent in gastrointestinal MR imaging. Radiology 1995; 194: 119123.
  • 4
    Riordan RD, Khonsari M, Jeffries J, Maskell GF, Cook PG. Pineapple juice as a negative oral contrast agent in magnetic resonance cholangiopancreatography: a preliminary evaluation. Br J Radiol 2004; 77: 991999.
  • 5
    Mino Y, Yamada K, Takeda T, Nagasawa O. Metal-containing components in medicinal plants. III. Manganese-containing components in Theae folium as oral magnetic resonance imaging contrast materials. Biol Pharm Bull 1996; 44: 23052308.
  • 6
    Vera García R, Basualdo I, Peralta I, de Herebia M, Caballero S. 1997 Minerals content of Paraguayan yerba mate (Ilex paraguariensis S.H.) Arch Latinoam Nutr 1997; 47: 7780.
  • 7
    Fossati C. On the virtue and therapeutic properties of “yerba-mate” (Ilex paraguayensis or paraguariensis St. Hilaire 1838) (Article in Italian: Sulle virtù e sulle proprietà terapeutiche della “yerba-mate”hit3 (Ilex paraguayensis o paraguariensis, St Hilaire 1838). Clin Terapeut 1976; 78: 265272.
  • 8
    Chandra A, Gonzalez de Mejia E. Polyphenolic compounds, antioxidant capacity, and quinone reductase activity of an aqueous extract of Ardisia compressa in comparison to mate (Ilex paraguariensis) and green (Camellia sinensis) teas. J Agric Food Chem 2004; 52: 35833589.
  • 9
    Castellsagué X, Muñoz N, De Stefani E, Victora CG, Castelletto R, Rolón PA. Influence of mate drinking, hot beverages and diet on esophageal cancer risk in South America. Int J Cancer 2000; 88: 658664.
  • 10
    Pizarro F, Olivares M, Hertrampf E, Walter T. Factors which modify the nutritional state of iron: tannin content of herbal teas [Article in Spanish: Factores que modifican el estado de nutrición de hierro: contenido de taninos de infusiones de hierbas] Arch Latinoamer Nutr 1994; 44: 277280.
  • 11
    Lips O, Privalow A, Dvinskikh SV, Fujara F. Magnet design with high B0 homogeneity for fast-field-cycling NMR applications. J Magn Reson 2001; 149: 2228.
  • 12
    Rieber A, Nüssle K, Reinshagen M, Brambs HJ, Gabelmann A. MRI of the abdomen with positive oral contrast agents for the diagnosis of inflammatory small bowel disease Abdom Imaging 2002; 27: 394399.
  • 13
    Nestle N, Wunderlich A, Nüssle-Kügele K. In vivo observation of oxygen-supersaturated water in the human mouth and stomach. Magn Reson Imaging 2004; 22: 551556.
  • 14
    Rorden C, Brett M. Stereotaxic display of brain lesions. Behav Neurol 2000; 12: 191200. Software available online under
  • 15
    Tahvonen R. Contents of selected elements in some fruits, berries and vegetables on the finnish market in 1987–1989. J Food Compos Anal 1993; 6: 7586.
  • 16
    Lemberkovics E, Czinner E, Szentmihályi K, Balázs A, Szöke E. Comparative evaluation of Helichrysi flos herbal extracts as dietary sources of plant polyphenols, and macro- and microelements. Food Chem 2002; 78: 119127.
  • 17
    Bertini I, Luchinat C, Parigi G. Solution NMR of paramagnetic molecules—applications to metallobiomolecules and models. Amsterdam: Elsevier; 1990. 372 p.
  • 18
    Morsy MA, Khaled MM. Direct Electron paramagnetic resonance study of tobacco. 1. Manganese(II) as a marker. J Agric Food Chem 2001; 49: 683686.
  • 19
    Morsy MA, Khaled MM. Novel EPR characterization of the antioxidant activity of tea leaves. Spectrochim Acta A 2002; 58: 12711277.
  • 20
    Saldaña MDA, Zetzl C, Mohamed RS, Brunner G. Extraction of methylxanthines from guaraná seeds, maté leaves, and cocoa beans using supercritical carbon dioxide and ethanol. J Agric Food Chem 2002; 50: 48204826.
  • 21
    Filip R, Ferraro GE. Researching on new species of “Mate”: Ilex brevicuspis phytochemical and pharmacology study. Eur J Nutr 2003; 42: 5054.
  • 22
    Möller P, Paces T, Dulski P, Morteani G. Anthropogenic Gd in surface water, drainage system, and the water supply of the city of Prague, Czech Republic. Environ Sci Technol 2002; 36: 23872394.