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Objective: Diatom analysis is a valuable tool in forensic science and it is useful in diagnosis of drowning and determination of the drowning site. The basic principal of the “diatom test” in investigation of drowning is based on correlation between diatoms are present in the medium where the possible drowning took place and inhalation of water cau...
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... the corpses were removed from the water and the obtained plankton is summarized in Table I. Internal organ and body fluid samples of the corpses removed from water were examined and how many diatoms were detected from which tissue or liquid was summarized in Figure 13. Figure 13. ...
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... organ and body fluid samples of the corpses removed from water were examined and how many diatoms were detected from which tissue or liquid was summarized in Figure 13. Figure 13. Total diatom numbers obtained from internal organs in all corpses ...
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... diatoms obtained from the internal organs of the bodies and the diatoms obtained from the external surfaces of the bodies were compared and the microscope images of them were shared in Plankton images which are obtained from other than diatom the tissue samples of 3 cases other than diatom were shared in Figures 19, 20, 21. ...
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... this study, lung tissue samples in the case no:1, no:22 and no:29 obtained from Dinoflagellates cyst (Fig- ure 19), Prorocentrum micans ( Figure 20) and Bdelloid Rotifer (Figure 21), the method was successful in the tissues of the plankton of the advantage of the method in terms of detection and revealed that he has added value by showing an extra work. Prorocentrum micans redtide, known as the popular name, is a species of plankton, which causes characteristic excessive reproductive activity by turning the sea color red (15). ...
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... this study, lung tissue samples in the case no:1, no:22 and no:29 obtained from Dinoflagellates cyst (Fig- ure 19), Prorocentrum micans ( Figure 20) and Bdelloid Rotifer (Figure 21), the method was successful in the tissues of the plankton of the advantage of the method in terms of detection and revealed that he has added value by showing an extra work. Prorocentrum micans redtide, known as the popular name, is a species of plankton, which causes characteristic excessive reproductive activity by turning the sea color red (15). ...
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... case no: 11 which was the outer surface of the swab sample not available, diatoms obtained from the stomach and lung and diatoms obtained from intra-nose, Inter-toe and Fossa axillaries samples from case no:10 was found that they had the same type as the diatoms. This is thought to be a good example of the appearance of the sway samples taken from the surface to represent the suffocation environment ( Figure 18). ...
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Diatoms are unicellular, photosynthetic (autotrophic), eukaryotic organisms often classified as among the algae. They are scientifically known as Bacillariophyceae. Diatoms study can be used in medico-legal purpose to solve the cases of unclaimed drowned or dumped bodies. The detection of diatoms in the organs can contribute to a diagnosis of death...
The diatom test is a forensic technique that can provide supportive evidence in the diagnosis of drowning but requires the laborious observation and counting of diatoms using a microscopy with too much effort, and therefore it is promising to introduce artificial intelligence (AI) to make the test process automatic. In this article, we propose an a...
The diagnosis of drowning is one of the most difficult in forensic medicine. Forensic diatomology has been proposed to be useful in solving the diagnosis of drowning and considered to be a reliable indicator of the site of drowning. The Yangtze River and Jialing River are the main rivers in the Chongqing area (China), and a large number of corpses...
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Citations
Amaç: Tetikleyici neden farklı olsa da ölümcül dalış kazalarının büyük bir bölümü boğulma ile sonuçlanmaktadır. Boğulmanın gerçekleştiği derinliği bilmek, kaza nedenlerinin aydınlatılmasına önemli katkıda bulunabilir. Bu deneysel çalışmada, ölümcül dalış kazalarında, boğulma derinliğinin tespitinde planktonik organizmaların kullanılıp kullanılamayacağı amaçlanmıştır.
Gereç ve Yöntem: Bunun için Marmara Denizi’nde yüzeyden ve 30 metre derinlikten alınan su örneklerindeki planktonik organizmalar incelenmiştir. Ayrıca Wistar Albino türü 8 bireyden oluşan iki gruptan ilkinde bulunan sıçanların yüzeyden alınan su örneği içinde ve 1 ATA basınç altında, diğer grupta bulunan sıçanların ise 30 metre derinlikten alınmış su örneği içinde ve bir basınç odası içinde 4 ATA basınç altında boğulmaları sağlanmış ve boğulan sıçanların akciğerlerinde planktonik organizmalar araştırılmıştır.
Bulgular: Yapılan incelemelerde, yüzeyden alınan örnekte 22 fitoplanktonik ve 5 zooplanktonik takson, 30 metre derinlikten alınan örnekte ise 7 fitoplanktonik takson tespit edilmiştir. Sıçanların boğulma sonrası yapılan otopsilerde akciğerlerinde planktonik organizmaya rastlanmamış, 4 ATA basınç altında boğulan gruptaki sıçanların akciğerlerinin daha şişkin ve kanamalı olduğu gözlemlenmiştir. Akciğerlerde planktonik organizmaya rastlanmaması, sıçanların çok az miktarda sıvı aspire etmesinden ve örnekteki plankton yoğunluğunun düşüklüğünden kaynaklanmış olabileceği düşünülmüştür.
Sonuç: Dalış bölgelerindeki planktonik organizmaların, belirli derinliklere yaptıkları mevsimsel ve günlük göçlerinin (diurnal göç) belirlenmesi, ölümle sonuçlanan dalış kazalarında boğulma derinliğinin tespitine yardımcı olabilir. Ancak bu deneysel çalışmada boğulan sıçanların akciğerlerinde planktonik organizma tespit edilememiştir.
