Examinando por Autor "Purizaca Navarro, Miguel Angel"

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    Factores del medio ambiente e influencia en la identificación del grupo sanguíneo en manchas de sangre de interés criminalístico. Lima 2019
    (Universidad Privada Norbert Wiener, 2022-11-12) Purizaca Navarro, Miguel Angel; Casana Jara, Kelly Milagritos
    Objective: To determine how environmental factors influence the determination of blood groups in bloodstains of criminal interest. Lime, 2019. Materials and methods: This research used the hypothetical-deductive method, with a quantitative approach, basic type, non-experimental cross-sectional design and explanatory level. The population consisted of 270 samples consisting of blood stains prepared on polycotton fabrics of blood groups A, B and O, using a non-probabilistic method for selection. The technique used is observation and the data collection instrument was an observation guide. Results: According to the results obtained, we found that the effects of humidity and temperature on group A bloodstains give strongly positive results up to week 7, lowering the avidity to 1+ at week 10. In the case of blood group B stains the effects of humidity and temperature allow to demonstrate positive results up to week 9. No agglutination is observed at week 10. Group O blood spots, subjected to the effects of humidity and temperature, were positive during the ten weeks of the study, but with low avidity at week 10. Conclusions: According to the results obtained, it can be concluded that environmental factors such as humidity and temperature do not significantly influence the determination of blood groups of criminal interest, however, the exposure time can lower the avidity of the results.