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精液的可检测性在各种条件下保持在避孕套中
Christophe Ndayizeye1, Sahil Sharma1
1Department of Forensic Science, Chandigarh University, NH-95, Ludhiana, Mohali, Punjab 140413, India.
Forensic science international
|July 19, 2024
概括
避孕套上的精液检测甚至可以在90天后使用酸酶 (AP) 测试. 显微镜检查在几天内有效,但精液干燥会随着时间的推移限制其使用.
科学领域:
- 法医科学 法医科学 法医科学
- 生物化学 生物化学
背景情况:
- 在性侵犯案件中使用避孕套需要分析避孕套痕迹证据.
- 与滑剂分析相比,从避孕套中识别精液的研究是有限的.
研究的目的:
- 为了评估避孕套中的精液检测能力.
- 评估暴露时间,环境条件和避孕套类型对精液识别的影响.
- 为了确定酸酸酶 (AP) 测试和显微镜检查用于精液识别的疗效.
主要方法:
- 从三个捐赠者的精液样本被收集并通过显微镜确认.
- 样品被放置在两个安全套品牌 (dkt xxx,Manforce) 中,并存储在冷藏 (2-10°C) 或环境温度下 (约. 39°C) 的时间.
- 分析是在采集后11-60天和40-90天两批进行的.
主要成果:
- 精液可以在避孕套中检测到,测试适用性因暴露时间和条件而异.
- 非运动性精子在几天内就能看到.
- 25天后以室温 (25°C以上) 干燥精液或54天后冷藏 (10°C以下) 精液可以限制显微镜检查的有效性.
- 酸酸酶测试成功识别了长达90天的精液.
- 避孕套材料可能表现出交叉反应性,但不会妨碍基于AP的精液识别.
结论:
- 从避孕套中识别精液是可行的,使用法医技术.
- 酸酶检测是检测避孕套上的精液的可靠方法,即使经过长时间和在各种环境条件下.
- 显微镜检查是时间敏感的,因为潜在的精液干燥.
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