Now showing items 21-40 of 49

    • Rothhammer Achondo, Paula; Lagos, Liza Paz; Espinosa-Parrilla, Yolanda; Aboitiz, Francisco; Rothhammer Engel, Francisco (2012)
      Background: Worldwide diversity of alleles of D4 receptor gene (DRD4), linked to attention deficit hyperactivity disorder (ADHD), is mostly the result of length and single nucleotide polymorphisms in a 48-bp tandem repeat ...
    • Jaque López, Javier; López, Vladimir; Rojas, Daniel; Carrasco, Ximena; Rothhammer Achondo, Paula; García, Ricardo; Rothhammer Engel, Francisco; Aboitiz, Francisco (2004)
      Although there is extensive literature about the effects of stimulants on sustained attention tasks in attentional deficit/hyperactivity disorder (ADHD), little is known about the effect of these drugs on other attentional ...
    • Hünemeier, Tábita; Amorim, Carlos Eduardo Guerra; Azevedo, Soledad; Contini, Veronica; Acuña Alonzo, Víctor; Rothhammer Engel, Francisco; Dugoujon, Jean Michel; Mazières, Stephane; Barrantes, Ramiro; Villarreal-Molina, María Teresa; Paixão-Côrtes, Vanessa Rodrigues; Salza (2012)
      Culture and genetics rely on two distinct but not isolated transmission systems. Cultural processes may change the human selective environment and thereby affect which individuals survive and reproduce. Here, we evaluated ...
    • Quinto Sánchez, Mirsha; Adhikari, Kaustubh; Acuña Alonzo, Víctor; Cintas, Celia; Silva de Cerqueira, Caio Cesar; Ramallo, Virginia; Castillo, Lucia; Farrera, Arodi; Jaramillo, Claudia; Arias, Williams; Fuentes, Macarena; Everardo, Paola; Ávila, Francisco de; Gómez Valdés, Jorge; Hünemeier, Tabita; Gibbon, Shara; Gallo, Carla; Poletti, Giovanni; Rosique, Javier; Bortolini, María Cátira; Canizales Quinteros, Samuel; Rothhammer Engel, Francisco; Bedoya, Gabriel; Ruiz Linares, Andrés; González José, Rolando (Wuley Blackwell, 2015)
      Fluctuating and directional asymmetry are aspects of morphological variation widely used to infer environmental and genetic factors affecting facial phenotypes. However, the genetic basis and environmental determinants ...
    • Calaf, Gloria M.; Caba, Fresia; Farias, Jorge; Rothhammer Engel, Francisco (2010)
      Breast cancer is a common disease estimated to occur in 1 in 9 women over their lifetime. Epidemiological research has identified a number of risk factors for breast cancer. Racial and ethnic differences in breast cancer ...
    • Fuentes, Macarena; Pulgar, Iván; Gallo, Carla; Bortolini, María Cátira; Canizales-Quinteros, Samuel; Bedoya, Gabriel; González-José, Rolando; Ruiz-Linares, Andrés; Rothhammer Engel, Francisco (Sociedad Medica de Santiago, 2014)
      Background: The geographical distribution of genes plays a key role in genetic epidemiology. The Chilean population has three major stem groups (Native American, European and African). Aim: To estimate the regional rate ...
    • Rothhammer Engel, Francisco; Silva, Claudio (1992)
      Gene frequencies for 13 marker systems are used to construct synthetic gene frequency maps of South America. The surfaces generated using the first three principal components exhibit clines which validate models of population ...
    • O'Dowd, Brian F.; Rothhammer Engel, Francisco; Israel Jacard, Yedy (1990)
      Using the polymerase chain reaction to amplify genomic DNA from hair roots, we have examined the mitochondrial aldehyde dehydrogenase (ALDH2) genotypes of 28 individuals from the South American Mapuche Indians. We have ...
    • Wang, Sijia; Ray, Nicolas; Rojas, Winston; Parra, Maria V.; Bedoya, Gabriel; Gallo, Carla; Poletti, Giovanni; Mazzotti, Guido; Hill, Kim; Hurtado, Ana M.; Camrena, Beatriz; Nicolini, Humberto; Klitz, William; Barrantes, Ramiro; Molina, Julio A.; Freimer, Nelson B.; Cátira Bortolini, María; Salzano, Francisco M.; Petzl-Erler, Maria L.; Tsuneto, Luiza T.; Dipierri, José E.; Alfaro, Emma L.; Bailliet, Graciela; Bianchi, Néstor O.; Llop Romero, Elena; Rothhammer Engel, Francisco; Excoffier, Laurent; Ruiz Linares, Andrés (PUBLIC LIBRARY SCIENCE, 2008-03)
      The large and diverse population of Latin America is potentially a powerful resource for elucidating the genetic basis of complex traits through admixture mapping. However, no genome-wide characterization of admixture ...
    • Llop Romero, Elena; Rothhammer Engel, Francisco; Acuña, M.; Apt Baruch, Werner; Arribada, Arturo (1991)
      We studied the distribution of HLA, B and C antigens in 73 Chagasic subjects with and without heart disease. Both groups were matched for age, sex, birth place and history of family residence. Thirty two subjects without ...
    • Rothhammer Engel, Francisco; Cocilovo, José A. (UNIV TARAPACA, 2008)
      Recientemente, Sutter y Mertz (2004) a base de un análisis de rasgos craneanos no métricos postularon una ausencia de variación desde el Arcaico costero hasta el período Intermedio Tardío en el valle de Azapa, en ...
    • Rothhammer Engel, Francisco; Quevedo, Silvia; Cocilovo, José A.; Llop Romero, Elena (1984)
      Multivariate distance statistics were computed from 14 nonmetrical cranial variables among five prehistoric samples representing steps in the microevolutionary history of a coastal population in northern Chile. Roughly 70% ...
    • Rothhammer Engel, Francisco; Llop Romero, Elena; Cocilovo, Jose A.; Quevedo, Silvia (1982)
      Mahalanobis D2 statistics (with size and shape components) were computed for nine craniometric variables among five prehistoric groups representing steps in the microevolutionary history of a coastal population in Northern ...
    • Varela, Héctor Hugo; Cocilovo, José Alberto; Santoro, Calogero M.; Rothhammer Engel, Francisco (Sociedad de Biologia de Chile, 2006)
      The microevolution of the archaic populations from Chile's northern coast and its morphological contribution to Formative period groups was studied. The sample comprised 181 individuals belonging to two Archaic (Morro-Uhle ...
    • Moraga Vergara, Mauricio; Rocco, Paola; Miquel, Juan F.; Nervi, Flavio; Llop Romero, Elena; Chakraborty, Ranajit; Rothhammer Engel, Francisco; Carvallo, Pilar (Wiley-Liss, 2000-09)
      The mitochondrial DNAs (mtDNAs) from individuals belonging to three Chilean tribes, the Mapuche, the Pehuenche, and the Yaghan, were studied both by RFLP analysis and D-loop (control region) sequencing. RFLP analysis ...
    • García, Federico; Moraga, Mauricio; Vera, Soledad; Henríquez, Hugo; Llop Romero, Elena; Aspillaga Fontaine, Eugenio; Rothhammer Engel, Francisco (2006)
      The genetic variability of four predominantly Indian populations of southern Chile's archipelagos was examined by determining the frequencies of four mitochondrial DNA haplogroups that characterize the American Indian ...
    • García, Federico; Moraga Vergara, Mauricio; Vera, Soledad; Henríquez B., Hugo; Llop Romero, Elena; Aspillaga Fontaine, Eugenio; Rothhammer Engel, Francisco (WILEY-LISS, DIV JOHN WILEY & SONS INC, 2006-03)
      The genetic variability of four predominantly Indian populations of southern Chile's archipelagos was examined by determining the frequencies of four mitochondrial DNA haplogroups that characterize the American Indian ...
    • Ruderman, Anahí; Pérez, Luis O.; Adhikari, Kaustubh; Navarro, Pablo; Ramallo, Virginia; Gallo, Carla; Poletti, Giovanni; Bedoya, Gabriel; Bortolini, Maria C.; Acuña Alonzo, Víctor; Canizales Quinteros, Samuel; Rothhammer Engel, Francisco; Ruiz Linares, Andrés; González José, Rolando (Wiley-Liss Inc., 2019)
      Objectives: This article aims to assess the contribution of genomic ancestry and socioeconomic status to obesity in a sample of admixed Latin Americans. Methods: The study comprised 6776 adult volunteers from Brazil, Chile, ...
    • Rothhammer Engel, Francisco; Moraga Vergara, Mauricio; Santoro, Calogero M.; Arriaza, Bernardo T. (2010)
      Sophisticated molecular genetics techniques allow the typification and posterior comparison of antique haplogroups and mitochondrial DNA sequences from prehistoric groups with contemporary populations. This adds a ...
    • Aspillaga Fontaine, Eugenio; García, Federico; Moraga Vergara, Mauricio; Vera, Soledad; Henríquez B., Hugo; Llop Romero, Elena; Ocampo, Carlos; Rothhammer Engel, Francisco (2004)
      Las etnias originarias del archipiélago de Chiloé presentan características culturales que plantean preguntas acerca de su origen como entidad genética independiente y distinta del grupo continental. Al respecto, ...