Browsing Ciencias básicas by Procedence

Now showing items 1-14 of 14

    • A molecular study of Neophyllaphis varicolor (Hemiptera, Aphididae) in Costa Rica 

      Zúñiga Centeno, Adonay; Sandoval Carvajal, Izayana; Montero Astúa, Mauricio; Villalobos Muller, William; Quốc, Nguyễn Bảo; Pérez Hidalgo, Nicolás (2019-07)
      The genus Neophyllaphis (Takahashi) (Aphididae: Neophyllaphidinae) is composed of 18 species; however, in the Americas only nine species have been reported previously. A new species, Neophyllaphis varicolor Miller & ...

    • Análisis de residuos de plomo en repollo de Costa Rica 

      Mora Alfaro, Luis Enrique; Carazo Rojas, Elizabeth; Fuentes González, Gilbert; Constenla Umaña, Manuel Arturo; Rodríguez M., Leonor (1984)
      Lead residues analysis in cabbage. Cabbage and soil samples from the main cabbage growing areas of Costa Rica were analyzed for lead residues. Lead residues result from the use of lead arseniate as an insecticide and ...

    • Arabidopsis CHROMOSOME TRANSMISSION FIDELITY 7 (AtCTF7/ECO1) is required for DNA repair, mitosis and meiosis 

      Bolaños Villegas, Pablo Alberto; Yang, Xiaohui; Wang, Huei-Jing; Juan, Chien-Ta; Chuang, Min-Hsiang; Makaroff, Christopher A.; Jauh, Guang-Yuh (The Plant Journal 75: 927–940, 2013-06-10)
      The proper transmission of DNA in dividing cells is crucial for the survival of eukaryotic organisms. During cell division, faithful segregation of replicated chromosomes requires their tight attachment, known as sister ...

    • Caracterización de productores de hortalizas orgánicas distribuidas en la Gran Área Metropolitana (GAM), Costa Rica 

      Camacho Calvo, Ana Marlen; Arauz Vásquez, Karen Lorena; Barboza Vargas, Natalia María; Martínez Higuera, Héctor A.; Arias Reverón, Julio Miguel (2015)
      Para caracterizar la población de productores que distribuyen hortalizas orgánicas en la Gran Área Metropolitana (GAM) de Costa Rica, se aplicó una encuesta semi-estructurada a 30 de ellos, ubicados en distintos puntos de ...

    • Cytological Identification of Chromosomal Rearrangements in Doritaenopsis and Phalaenopsis 

      Bolaños Villegas, Pablo Alberto; Chen, Fure-Chyi (Journal of International Cooperation (Taiwan) 2(1): 1-11, 2007-09-01)
      This study investigated the impact of gross chromosomal rearrangements, specifically translocations and inversions, on the division of pollen mother cells in hybrids Dtps. Queen Beer, Dtps. Sinica Sunday, Dtps. Sweet ...

    • Draft Genome Sequences of Two Cyanobacteria Leptolyngbya spp. Isolated from Microbial Mats in Miravalles Thermal Spring, Costa Rica 

      Brenes Guillén, Laura Natalia; Vidaurre Barahona, Daniela; Mora López, Marielos; Uribe Lorío, Lorena (2021)
      We report the draft genome sequences of Leptolyngbya sp. strain 7M and Leptolyngbya sp. strain 15MV, isolated from Miravalles Thermal Spring, Costa Rica. The thermophilic cyanobacteria exhibit unique diversity features ...

    • External Morphology of Tagosodes orizicolus (Homoptera: Delphacidae) Revealed by Scanning Electron Microscopy 

      Mora Castro, Rebeca; Retana Salazar, Axel P.; Espinoza Esquivel, Ana Mercedes (2001)
      A comprehensive analysis of the ultrastructure of the delphacid rice pest Tagosodes orizicolus (Muir) was undertaken using scanning electron microscopy to resolve taxonomic problems in the distinction of females and nymphs ...

    • Meiotic Chromosome Behavior and Capsule Setting in Doritaenopsis Hybrids 

      Bolaños Villegas, Pablo Alberto; Chin, Shih-Wen; Chen, Fure-Chyi (J. AMER. SOC. HORT. SCI. 133(1):107–116. 2008, 2008-10-06)
      The development of new cultivars in Doritaenopsis Guillaum. & Lami orchids is often hindered by factors such as low seed count in hybrids. Cytological study may offer the ability to develop new hybrids by revealing cultivars ...

    • Pollen development: a play with many actors 

      Bolaños Villegas, Pablo Alberto; Jane, Wann-Neng; Jauh, Guang-Yuh (Current Topics in Plant Biology 11: 89-102. 2010, 2010-09-01)
      Seeds are a major resource of food supply around the world and their production depends on successful double fertilization during plant sexual reproduction. In higher plants, fertilization of female gametophytes involves ...

    • Pollen Meiotic Behavior in Relation to Phalaenopsis Breeding 

      Hsu, Shih-Chieh; Cheng, T.C.; Bolaños Villegas, Pablo Alberto; Chin, Shih-Wen; Chen, Fure-Chyi (Acta Horticulturae 878: 139-144 (2010), 2010)
      The breeding of Phalaenopsis orchids involves the cross-pollination of two selected parental plants. Parents with re gular meiotic behavior can often produce seeds successfully. Currently most Phalaenopsis hybrids are ...

    • Protocol for the preparation of Arabiopsis meiotic chromosome spreads and fluorescent in situ hybridization 

      Bolaños Villegas, Pablo Alberto; Yang, Xiaohui; Makaroff, Christopher A.; Jauh, Guang-Yuh (Bio-protocol 4(7), e1102, 2014, 2014-04-05)
      This protocol is a more detailed version of previous protocols (Yang et al., 2011; Bolaños-Villegas et al., 2013) developed for the examination of meiotic chromosome spreads. Meiotic chromosome spreads are useful to determine ...

    • Residuos de insecticidas organofosforados en repollo (Brassica oleracea var. capitata) 

      Carazo Rojas, Elizabeth; Fuentes González, Gilbert; Constenla Umaña, Manuel Arturo (1976)
      Pesticide residues from organophosphorus insecticides were determined colorimetrically in cabbage (Brassica oleracea var. capitata) var. "Golden Acre", ready for shipment to the market. The cabbage studied came from Palmira ...

    • Rise of the clones: apomixis in plant breeding 

      Bolaños Villegas, Pablo Alberto; Thangasamy, Saminathan; Jauh, Guang-Yuh (Flowering plants: classification, characteristics and breeding, Chapter: 4, Publisher: Nova Publishers, Editors: J.J. Tellstone, pp.97-117, 2011)
      In flowering plants the transfer of traits from one generation to the other involves fertilization of female gametophyte with sperm cells delivered by pollen tube, and the subsequent reassortment of traits (alleles) in the ...

    • Studies of methamidophos-C-14 in Costa Rican vegetables and soils 

      Carazo Rojas, Elizabeth; Constenla Umaña, Manuel Arturo; Fuentes González, Gilbert; Moza, Pran Nath (1984)
      In order to see the effect of time lapse between the last application of methamidophos and harvesting insecticide was applied on lettuce plants (6,84 μCi in one experiment and 4,03 μCi in the other experiment). Analysis ...