José Ruiz Ordóñez

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This paper addresses the problem of efficient image retrieval from a compressed image database, using information derived from the compression process. Images in the database are compressed applying two approaches: Vector Quantization (VQ) and Quadtree image decomposition. Both are based on Konohen’s Self-Organizing Feature Maps (SOFM) for creating vector(More)
Isolated embryos ofKarwinskia humboldtiana were cultured in vitro. The growth of embryos and development to plantlets on woody plant medium supplemented with indole-3-acetic acid 6.10-2 μmol l−1, gibberellic acid (GA3) 3.10-2 μmol l−1, and 6-benzylaminopurine (BA) 2 μmol l−1 was obtained. Multiplication of shoots and rooting of excised shoots has been(More)
Explants from single trees of Abies concolor (Gord. et Glend) Lindl. • Abies grandis (mature embryo), Quercus robur L. (embryonic axis, young stem segments), Quercus rubra L. (young stem segments) and Castanea sativa L. (embryonic axis of mature embryo) were cultured on a callusinducing medium with NAb, or IBA (in Castanea) and BAP. Differentiation of(More)
To follow different patterns of morphogenesis in embryogenic and nonembryogenic calli and to d~ermine whether polyamines are involved in regulation of alfalfa somatic embryogenesis, central segments from leaves of alfalfa (Medicago sativa L.) were studied. At the beginning they were cultured on solid basic BL medium supplemented with 100 gM 2,4-D a 5 p.M(More)
Zygotic embryos of Karwinskia parvifolia, isolated from seeds obtained from different regions of Mexico, were cultured on Woody Plant Medium (WPM) supplemented with 0.06 µM indole-3-acetic acid, 0.03 µM gibberellic acid, and 2 µM 6-benzylaminopurine. The growth of embryos and multiplication of shoots from stem segments were achieved. Rooting of excised(More)
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