Browsing by Author "b57bef58-5c58-40e0-ae4e-44b654e444bf"
Now showing items 1-20 of 20
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Valenzuela, Carlos Y. (1997)A new strategy and four new methods are presented to calculate the limits of the confident interval for an estimate of a proportion equal to 1.0 or 0.0. A current formula which includes 1/(2n) for continuity correction ...
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Analyzing the potential for solar thermal energy utilization in the Chilean copper mining industry Quiñones, Gonzalo; Felbol, Carlos; Valenzuela, Carlos; Cardemil Iglesias, José; Escobar, Rodrigo A. (Elsevier, 2020)Copper mining is the largest industry and energy consumer in Chile, utilizing heat from imported fossil fuels of which Chile is not a producer. The goals for decarbonization present opportunities to analyze how the Chilean ...
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Salas, Sofía P.; Salinas Ríos, Rodrigo Alejandro; Besio, Mauricio; Micolich, Constanza; Arriagada Urzúa, Anamaría; Misseroni Raddatz, Adelio; Valenzuela, Carlos Y.; Novoa, Fernando; Bórquez Estefó, Gladys (Sociedad Médica Santiago, 2020)The discussion of a bill that allows medically assisted death (MAD) in Chile, revived the debate about the ethics of this practice. The Department of Ethics of the Chilean Medical Association herein analyzes arguments in ...
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Zemelman Decarli, Viviana; Valenzuela, Carlos Y.; Fisch, Félix; Road, Johanna; Honeyman Mauro, Juan (2003)Background: There is an increase in the incidence rates of skin cancer in Chile. Aim: To study the clinical diagnostic accuracy (CDA) for skin cancer. Material y methods: CDA was defined as the percentage of agreement ...
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Valenzuela, Carlos Y. (1997)Background: Chilean girls of middle and low socioeconomic levels are shorter than their European or North American counterparts. Aim: To challenge the hypothesis that undernutrition is the cause of the shorter stature of ...
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González Hormazábal, Patricio; Bravo, Teresa; Blanco Castillo, Rafael; Valenzuela, Carlos Y.; Gómez, Fernando; Waugh, Enrique; Peralta Musre, Octavio; Ortúzar, Waldo; Reyes, José Miguel; Jara Sosa, Lilian (BIOMED CENTRAL LTD, 2008-04-23)Background: The ATM gene has been frequently involved in hereditary breast cancer as a low-penetrance susceptibility gene but evidence regarding the role of ATM as a breast cancer susceptibility gene has been contradicto ...
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López, Néstor; Jara, Lilian; Valenzuela, Carlos (2005)Background: Several studies have investigated genetic polymorphisms for cytokines as potential genetic markers for periodontitis. Some studies have found that interleukin (IL)-1A and IL-1B polymorphisms are associated with ...
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Verdugo Salgado, Ricardo; Di Genova, Alex; Herrera Cisterna, Luisa; Moraga Vergara, Mauricio; Acuña Patzke, Mónica; Berríos del Solar, María Soledad; Llop Romero, Elena; Valenzuela, Carlos Y.; Bustamante Calderón, María Leonor; Digman, Dayhana; Symon Maturana, Adriana; Asenjo, Soledad; López Contreras, Pamela; Blanco, Alejandro E.; Suazo Sanhueza, José; Barozet, Emmanuelle; Caba, Fresia; Villalón Calderón, Marcelo; Alvarado Orellana, Sergio; Cáceres Lillo, Dante; Salgado, Katherine; Portales, Pilar; Moreno Estrada, Andrés; Gignoux, Christopher; Sandoval, Karla; Bustamante, Carlos; Eng, Celeste; Huntsman, Scott; Burchard, Esteban; Loira, Nicolás; Maass Sepúlveda, Alejandro; Cifuentes Ovalle, Lucía (Sociedad de Biología de Chile, 2020)Background Current South American populations trace their origins mainly to three continental ancestries, i.e. European, Amerindian and African. Individual variation in relative proportions of each of these ancestries may ...
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Valenzuela, Carlos Y. (2005)
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Valenzuela, Carlos Y.; Flores, Sergio V.; Cisternas, Javier (Society of Biology of Chile, 2010)We examined 103 nucleotide sequences of the HIV-1 env gene, sampled from 35 countries and tested: I) the random (neutral) distribution of the number of nucleotide changes; II) the proportion of bases at molecular equilibrium; ...
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Arcos-Burgos, Mauricio; Valenzuela, Carlos Y.; Herrera, Patricio J.; Pandey, Janardan P. (1997)Background: The knowledge of the genie structure of a population is of great importance for evolutive studies. Aim: To estimate in a Chilean population sample from the low-middle and low socioeconomic strata of Santiago, ...
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López, Néstor; Valenzuela, Carlos; Jara, Lilian (2009)Background: Epidemiologic studies have shown an increased frequency, severity, and risk of periodontitis in patients with diabetes. Periodontitis is associated with certain interleukin (IL)-1 gene cluster polymorphisms. ...
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Salas, Sofía; Besio, Mauricio; Bórquez Estefo, Gladys; Salinas Ríos, Rodrigo; Valenzuela, Carlos Y.; Micolich, Constanza; Novoa Sotta, Fernando; Bernier Villarroel, Lioniel; Montt, Julio; Misseroni Raddatz, Adelio (Soc Médica Santiago, 2016)The Chilean bill that regulates abortion for three cases (Bulletin No 9895-11) includes the possibility that health professionals may manifest their conscientious objection (CO) to perform this procedure. Due to the broad ...
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Valenzuela, Carlos Y. (1997)A model for testing molecular evolution is proposed. Randomness of recurrent mutation is defined based on isotropy and zero convariance among nucleotide sites. Assuming an equal rate of mutation for the bases A, T, G, and ...
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Valenzuela, Carlos Y. (1983)Students aged 6 to 20 years attending the public schools in the Northern Area of Santiago, Chile, were examined to search for the developmental origin of the large sex dimorphism in adult stature found in this population. ...
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Valenzuela, Carlos Y. (2005)True cloning is fission, budding or other types of asexual reproduction. In humans it occurs in monozygote twinning. This type of cloning is ethically and religiously good. Human cloning can be performed by twinning (TWClo) ...
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Valenzuela, Carlos Y. (1997)The analysis of the early human life from the view point of a scientific ethics is presented. Life is a historical materioenergetic process of specific organization. This phylo-ontogenetic process is a continuos process ...
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Cordero, María Elena; Valenzuela, Carlos Y.; Torres, Rafael; Rodríguez, Ángel (Elsevier, 2000)The number and proportion of neurons in the median raphe nuclei stained by the Golgy-Cox and Nissl methods was compared in males and females infants. When subjects are matched by age and cause of death the number and ...
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Zemelman Decarli, Viviana; Von Beck, Petra; Alvarado, Orlando; Valenzuela, Carlos Y. (2002)Background: The risk of skin cancer is correlated with skin colour. Pigmentation protects against the effects of UV radiation. Aim: To study skin, eyes and hair colour in Chilean teenagers. Material and methods: The ...
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Valenzuela, Carlos Y. (2005)Recent studies show that assisted reproductive technologies (ART), whether in vitro fertilization (IVF) or intra-cytoplasmatic sperm injection (ICSI) or applied to cloning by somatic cell nuclear transfer (SCNT) are ...