Altersbestimmungen von Blutspuren

Schwarzacher,

doi:10.1007/bf01751323

Cited by 8 publications

(4 citation statements)

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“…2-9 sind insgesamt 52 Remissionskurven aufgezeichnet, die die farblichen Verfinderungen der Blutflecken auf unterschiedlichem Trfigermaterial [9] angenommen, ,,vor allem die Lichteinwirkung den Charakter und die Geschwindigkeit des Alterungsprozesses bedingen", sondern dab in erster Linie ein Ansteigen der Temperatur auf durchschnittlich 20 ° C die farblichen Verfinderungen ausl6st, was im Vergleich mit den Remissionskurven in den Abb. 2-9 sind insgesamt 52 Remissionskurven aufgezeichnet, die die farblichen Verfinderungen der Blutflecken auf unterschiedlichem Trfigermaterial [9] angenommen, ,,vor allem die Lichteinwirkung den Charakter und die Geschwindigkeit des Alterungsprozesses bedingen", sondern dab in erster Linie ein Ansteigen der Temperatur auf durchschnittlich 20 ° C die farblichen Verfinderungen ausl6st, was im Vergleich mit den Remissionskurven in den Abb.…”

Section: Remissionsanalysen Und Besprechungunclassified

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Die Anwendung der Remissionsanalyse zur direkten farbmetrischen Bestimmung des Blutfleckenalters

Lins

Blazek²

1982

Z Rechtsmed

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A review is given of the conventional methods of determining the age of blood stains by forensic examination of trace evidence. Detailed analysis of the samples in several steps, which destroyed the traces, and the widely differing results do not appear satisfactory with regard to their use in forensic investigations. Considering the change in color with increasing age the three coloric parameters (chroma, hue, and value of the blood stain) can yield exact numerical measurements which allow to draw relatively reliable conclusions as to the age of the blood stain. Of the three colorimetric methods, based on equalization, three regions, and spectral analysis, respectively, only the last may be considered really satisfactory and up to the requirements of forensic medicine. It has the additional advantage of being independent of the visual acuity of the examiner and of the type and quality of the source of illumination. The aging of freshly taken venous blood, which has been deposited on filter paper or linen, can last up to 33 days, either in the dark or in day light, with due regard to temperature and humidity. The spectrophotometric color measurements taken place on the immediate surface of the blood stain in the range of the visual spectrum between 400 and 600 nm. The continuously drawn spectral curves are then subject to remission analysis the first step. The second step consists in a mathematical computer analysis of color valence measurements.

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Section: Remissionsanalysen Und Besprechungunclassified

“…Ausftihrliches Schrifttum ist u. a. bei Leers [5], Schwarzacher [9], Rauschke [8] Der fiberwiegende Teil der Methoden zur Altersbestimmung von Blutflecken basiert auf Farb-und LSslichkeitsver~inderungen des roten Blutfarbstoffes und seiner Abbauprodukte.…”

Section: Introductionunclassified

Die Anwendung der Remissionsanalyse zur direkten farbmetrischen Bestimmung des Blutfleckenalters

Lins

Blazek²

1982

Z Rechtsmed

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“…Since then several approaches were www.elsevier.com/locate/forsciint Forensic Science International 170 (2007) [8][9][10][11][12][13][14] proposed to have potentially solved this important problem during crime scene investigation, but none of these could ever be established in forensic practice. An attempt was undertaken by evaluating the time differences of the solubility of bloodstains of different ages [4]. In control experiments it turned out, that both methods considerably diverge from the real age of an investigated bloodspot.…”

Section: Introductionmentioning

confidence: 99%

Age determination of blood spots in forensic medicine by force spectroscopy

Strasser

Zink

Kada

et al. 2007

Forensic Science International

111

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“…For example, observation of postmortem changes in the corpse, such as cooling of the body, post-mortem rigidity, appearance of post-mortem lividity, mummification, adipocere and the extent of digestion of foods in the stomach and intestines, have been used [1][2][3]. Physiological techniques for investigation of bloodstains have also been developed [4][5][6][7][8][9][10]. In addition, changes in enzyme activities [11] and the surface absorption spectrum [12,13] of bloodstains have been utilized to determine the age of bloodstains.…”

Section: Introductionmentioning

confidence: 99%