silicon and Drowning

silicon has been researched along with Drowning* in 4 studies

Other Studies

4 other study(ies) available for silicon and Drowning

ArticleYear
A new method for estimating time since death by analysis of substances deposited on the surface of dental enamel in a body immersed in seawater.
    International journal of legal medicine, 2019, Volume: 133, Issue:5

    The present investigation was performed with the objective of developing a method to estimate how long a corpse had been immersed in water after death (the time since death). Accurate determination of the time elapsed since death may lead to identification of the place of drowning, and therefore, serves not only as a piece of information useful for determination of the cause of death but also leads to prompt identification of the body. The results showed that diatoms attached to the surface of dental enamel increased with prolongation of immersion time in water. Further, as the immersion time increased, the quantity of O, Si, Mg, K, Al, and S detected on the surface of dental enamel increased, while the quantity of the main dental components (Ca and P) that were detected gradually decreased. Based on these results, we calculated a regression formula to estimate the immersion time. Our method is considered to be a breakthrough technique for evaluating the time since death more objectively, compared to the conventional method of determination based on the degree of decomposition of the corpse.

    Topics: Aluminum; Cadaver; Calcium; Dental Enamel; Diatoms; Drowning; Forensic Dentistry; Humans; Magnesium; Microscopy, Electron, Scanning; Oxygen; Phosphorus; Potassium; Regression Analysis; Seawater; Silicon; Sulfur; Time Factors

2019
Haematic silicon in drowning.
    Journal of forensic and legal medicine, 2016, Volume: 39

    The aim of this paper was to evaluate silicon (Si) concentration in human whole ventricular blood as a further potential chemical marker in the diagnosis of drowning. We employed an acidic digestion for the extraction of soluble Si, and an alkaline digestion for the determination of total Si, including particulate matter, both arising from drowning medium. 29 suspected drowning situations, 24 in fresh water (Fw) and 5 in seawater (Sw), were examined. The difference in Si concentration between the left and right ventricular blood (Si ΔL-R) was measured and alkaline Si ΔL-R seems, indeed, a potentially significant complementary tool in the diagnosis of Fw drowning, because insoluble silicon fraction does not undergo hemo-dilution or hemo-concentration, and the ΔL-R is not affected by exogenous factors. In spite of the limited number of cases investigated, a good correlation was observed between the analytical results and the macro-microscopic autoptic findings.

    Topics: Adolescent; Adult; Aged; Aged, 80 and over; Biomarkers; Case-Control Studies; Child; Child, Preschool; Double-Blind Method; Drowning; Female; Forensic Pathology; Fresh Water; Heart Ventricles; Humans; Male; Middle Aged; Seawater; Silicon; Young Adult

2016
Silicon determination in human ventricular whole blood: a possible marker of drowning.
    Analytical biochemistry, 2012, Jul-15, Volume: 426, Issue:2

    This article presents the first results demonstrating that total silicon trace concentration in human ventricular whole blood may be used as a further marker in the diagnosis of drowning. The difference in silicon content between the left and right ventricles was significantly higher for drowning cases than that from individuals who had not drowned. These findings were in full agreement with autoptic responses, supporting silicon as a marker of freshwater drowning. The procedure entails an alkaline microwave-assisted digestion using tetramethylammonium hydroxide (TMAH) in the presence of H(2)O(2) followed by dynamic reaction cell inductively coupled plasma mass spectrometry (DRC-ICP-MS) detection, whose accuracy was obtained for Seronorm whole blood reference material. Satisfactory recoveries (91-98%) were gained on whole ventricular blood, with a silicon content lower than the method detection limit (MDL), spiked at 5 to 7μgg(-1) with materials consistent with drowning media constituents, that is, freshwater plankton (CRM [certified reference material] 414), silicon dioxide, diatomaceous earth powder, and a silicon standard solution. Good within-lab reproducibility (4-10%) and sensitivity (MDL=0.46μgg(-1)) were achieved as well. The procedure was applied to blood samples from 18 different real cases of death.

    Topics: Biomarkers; Drowning; Heart Ventricles; Humans; Hydrogen Peroxide; Mass Spectrometry; Quaternary Ammonium Compounds; Silicon; Silicon Dioxide

2012
[Determination of acid-resistant silicic particles in lung by micro-XRF and its application in diagnosis of drowning].
    Fa yi xue za zhi, 2010, Volume: 26, Issue:4

    Using microbeam X-ray fluorescence (Micro-XRF) analyzer for determination of acid-resistant silicic particles in lung, and to explore its potential application in diagnosis of drowning.. Thirty two white rabbits were divided randomly into drowning group (n=12), post-mortem immersion group (n=10) and control group (n=10). Lungs and water sample were collected for determination of area concentration of acid-resistant silicic particles using Micro-XRF method.. The area concentration of acid-resistant silicic particles for the drowning water sample was 4.4 mm2/mL. For the lungs of drowning group, the post-mortem immersion group and the control group, the determined average values were (25.30 +/- 10.95) mm2/g, (1.68 +/- 0.63) mm2/g and (1.65 +/- 0.85) mm2/g, respectively, with a statistically significant difference between the drowning group and the other two groups.. The area concentration of acid-resistant silicic particles in lungs may be used as an indicator of drowning. The method is highly sensitive and rapid. It provides a potential application in drowning diagnosis.

    Topics: Animals; Drowning; Female; Fluorescence; Forensic Pathology; Fresh Water; Lung; Male; Rabbits; Silicon; Spectrometry, X-Ray Emission

2010
chemdatabank.com