Assessment of zinc in seminal stains and its application in forensic practice
The study of semen in legal medicine is a frequent fact that is why it takes importance in problems related to Criminal Law. Zinc (ZN) is found in prosthetic fluid in high concentration. The determination of Zinc in stains is proof that it can be utilized as the indicator of a seminal presence even...
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Universidad Autónoma de Tamaulipas
2010
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oai:ojs.pkp.sfu.ca:article-2482017-11-21T15:47:53Z Assessment of zinc in seminal stains and its application in forensic practice Valoración del Cinc en manchas seminales y su aplicación en la práctica forense Pavesi, Adriana Bouvet, Beatriz Girolami, Héctor Servidio, Analía Paparella, Cecilia Zinc seminal stains Criminalistics legal Medicine atomic absorption spectrophotometry. Cinc manchas seminales Criminalística Medicina Legal espectrofotometría de absorción atómica. The study of semen in legal medicine is a frequent fact that is why it takes importance in problems related to Criminal Law. Zinc (ZN) is found in prosthetic fluid in high concentration. The determination of Zinc in stains is proof that it can be utilized as the indicator of a seminal presence even in the absence of sperm. The objective of this work is to evaluate the levels of Zinc in seminal stains and its aplication in forensic practice. For this study 33 stains where analyzed, placing 0.2ml of seminal plasma over a dry canvas. Cuts where made on 0.7854 cm2 areas of stained cloth and 33 areas of the non stained cloths. There was also the mineralization of the matter to a final volume of 10ml determining Zinc by spectrophotometry of atomic absorption. All the material used was decontaminated with nitric acid to the 10%. The Zinc concentration was calculated by cm2 (square centimeters) for both groups of samples, the average for the stained clots remained a 23.47 ug/cm2 with a slight standard deviation of 0.09 and in the non stained cloths the average was 3.00 ug/cm2 with a standard deviation of 0.10. The student test was applied to compare the averages between both groups and the diferences where statistically big (P=0.006). Zinc determinations in seminal stains can be applied in sexually related crimes portrayed by azoospermic or oligozoospermic objects. Their cuantification in suspect stains can be considered for the exclusion of seminal plasma. El estudio de semen en medicina legal es un hecho frecuente por lo que adquiere importancia en problemas vinculados al Derecho Penal. El cinc (Zn) se encuentra en altas concentraciones en el fluido prostático. La determinación de cinc en manchas es una prueba que puede utilizarse como indicador de la presencia seminal aún en ausencia de espermatozoides. El objetivo de este trabajo es evaluar los niveles de Zn en manchas seminales y su aplicación en la práctica forense. Para ello se prepararon 33 manchas de semen colocando 0.2 ml de plasma seminal sobre un lienzo, secado a temperatura ambiente. Se cortaron áreas de 0.7854 cm2 de tela manchada y 33 áreas de tela sin manchar. Se realizó mineralización de la materia orgánica llevando a un volumen final de 10 ml determinándose Zn por espectrofotometría de absorción atómica. Todo el material utilizado se decontaminó con ácido nítrico al 10%. Se calculó la concentración de Zn por cm2 para ambos grupos de muestras, el promedio para las telas con manchas de semen fue de 23.47 ug/cm2 con un desvío estándar de 9.09 y el de las telas sin las manchas fue de 3.00 ug/cm2 con un desvío estándar de 0.10. Se aplicó la prueba t student para comparar los promedios entre ambos grupos y las diferencias fueron estadísticamente significativas (P= 0.006). Las determinaciones de Zn en manchas seminales se pueden aplicar en la investigación de casos de abusos sexual realizados por sujetos azoospérmicos u oligozoospérmicos. Su cuantificación en manchas sospechosas puede considerarse como un ensayo de exclusión de plasma seminal. Universidad Autónoma de Tamaulipas 2010-03-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistaciencia.uat.edu.mx/index.php/CienciaUAT/article/view/248 CienciaUAT; Vol. 4 No. 3: January-March 2010; 69-73 CienciaUAT; Vol. 4 No. 3: Enero-Marzo 2010; 69-73 2007-7858 2007-7521 eng https://revistaciencia.uat.edu.mx/index.php/CienciaUAT/article/view/248/114 |
| institution |
CIENCIA UAT |
| collection |
OJS |
| language |
eng |
| format |
Online |
| author |
Pavesi, Adriana Bouvet, Beatriz Girolami, Héctor Servidio, Analía Paparella, Cecilia |
| spellingShingle |
Pavesi, Adriana Bouvet, Beatriz Girolami, Héctor Servidio, Analía Paparella, Cecilia Assessment of zinc in seminal stains and its application in forensic practice |
| author_facet |
Pavesi, Adriana Bouvet, Beatriz Girolami, Héctor Servidio, Analía Paparella, Cecilia |
| author_sort |
Pavesi, Adriana |
| title |
Assessment of zinc in seminal stains and its application in forensic practice |
| title_short |
Assessment of zinc in seminal stains and its application in forensic practice |
| title_full |
Assessment of zinc in seminal stains and its application in forensic practice |
| title_fullStr |
Assessment of zinc in seminal stains and its application in forensic practice |
| title_full_unstemmed |
Assessment of zinc in seminal stains and its application in forensic practice |
| title_sort |
assessment of zinc in seminal stains and its application in forensic practice |
| description |
The study of semen in legal medicine is a frequent fact that is why it takes importance in problems related to Criminal Law. Zinc (ZN) is found in prosthetic fluid in high concentration. The determination of Zinc in stains is proof that it can be utilized as the indicator of a seminal presence even in the absence of sperm. The objective of this work is to evaluate the levels of Zinc in seminal stains and its aplication in forensic practice. For this study 33 stains where analyzed, placing 0.2ml of seminal plasma over a dry canvas. Cuts where made on 0.7854 cm2 areas of stained cloth and 33 areas of the non stained cloths. There was also the mineralization of the matter to a final volume of 10ml determining Zinc by spectrophotometry of atomic absorption. All the material used was decontaminated with nitric acid to the 10%. The Zinc concentration was calculated by cm2 (square centimeters) for both groups of samples, the average for the stained clots remained a 23.47 ug/cm2 with a slight standard deviation of 0.09 and in the non stained cloths the average was 3.00 ug/cm2 with a standard deviation of 0.10. The student test was applied to compare the averages between both groups and the diferences where statistically big (P=0.006). Zinc determinations in seminal stains can be applied in sexually related crimes portrayed by azoospermic or oligozoospermic objects. Their cuantification in suspect stains can be considered for the exclusion of seminal plasma. |
| publisher |
Universidad Autónoma de Tamaulipas |
| publishDate |
2010 |
| url |
https://revistaciencia.uat.edu.mx/index.php/CienciaUAT/article/view/248 |
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