Group-specific component content in bloodstains. An ageing and distribution study |
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| Authors: | G M Horscroft S A Westwood |
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| Affiliation: | 1. Universidade Federal do Rio de Janeiro, Instituto de Biofísica Carlos Chagas Filho, Laboratório de Micropoluentes Jan Japenga, Av. Carlos Chagas Filho, 373, Rio de Janeiro, RJ, 21941-902, Brazil;2. POPs Environmental Consulting, Schwäbisch Gmünd, 73527, Germany;1. School of Economics, Jiangxi University of Finance and Economics, China;2. School of Software Technology, Shanxi University, China;1. Sri Venkateswara University, Tirupati, 517502, AP, India;2. Deprtment of Internal Medicine, Texas Tech University of Health Science Centre, Lubbock, USA;1. Department of Food Science, College of Light Industry, Liaoning University, Liaoning Engineering Research Center for Food Bioprocessing, Shenyang Key Laboratory of Food Bioprocessing and Quality Control, Shenyang 110036, China;2. College of Food and Biological Engineering/Institute of Food Science and Engineering Technology, Hezhou University, Hezhou 542899, China;3. Forestry Biotechnology and Analysis Test Center, Liaoning Academy of Forestry Sciences, Shenyang 110032, China |
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| Abstract: | The content of group-specific component (Gc) in bloodstains, stored at room temperature, was examined using the Laurell rocket technique. The stains from eight donors were successfully tested over a period of 69 days. It was found that over this period, the level of Gc did not decrease. The Laurell rocket technique was also used to examine Gc in various sections of stains that had been prepared with liquid blood, plasma or serum diffusing into cloth from a single point. For plasma and serum the highest and lowest concentrations of Gc were found at the edge and centre of the stain respectively. Most bloodstains (86%) had either the same amount of Gc or more Gc at the edge than at the centre of the stain. Thus, Gc is a stable protein and as such is well-suited for forensic casework. However, its tendency to diffuse to the edge of a stain should be taken into account when areas of bloodstains are selected for analysis. |
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