Morphology of drying blood pools

Laan, Nick; Smith, Fiona; Nicloux, Céline; Brutin, David

doi:10.1016/j.forsciint.2016.08.005

Cited by 42 publications

(38 citation statements)

References 19 publications

(30 reference statements)

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“…Blood dries relatively quickly depending on the temperature, humidity and presence/absence of wind [79][80][81]. A study by van Oorschot et al [82] showed that blood (15 and 30 µl) on a hard non-porous substrate will dry within 30-60 min (quicker in warmer temperatures), and that the transfer rates of blood, 5 min after deposition, declines exponentially until the deposit is dry.…”

Section: Source and Freshness /Moisture Contentmentioning

confidence: 99%

DNA transfer in forensic science: A review

Oorschot

Szkuta

Meakin³

et al. 2019

Forensic Science International: Genetics

214

130

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Understanding the variables impacting DNA transfer, persistence, prevalence and recovery (DNA-TPPR) has become increasingly relevant in investigations of criminal activities to provide opinion on how the DNA of a person of interest became present within the sample collected. This review considers our current knowledge regarding DNA-TPPR to assist casework investigations of criminal activities. There is a growing amount of information available on DNA-TPPR to inform the relative probabilities of the evidence given alternative scenarios relating to the presence or absence of DNA from a specific person in a collected sample of interest. This information should be used where relevant. However, far more research is still required to better understand the variables impacting DNA-TPPR and to generate more accurate probability estimates of generating particular types of profiles in more casework relevant situations. This review explores means of achieving this. It also notes the need for all those interacting with an item of interest to have an awareness of DNA transfer possibilities post criminal activity, to limit the risk of contamination or loss of DNA. Appropriately trained forensic practitioners are best placed to provide opinion and guidance on the interpretation of profiles at the activity level. However, those requested to provide expert opinion on DNA-related activity level issues are often insufficiently trained to do so. We advocate recognition of DNA activity associated expertise to be distinct from expertise associated with the identification of individuals. This is to be supported by dedicated training, competency testing, authorisation, and regular fit for purpose proficiency testing. The possibilities for experts to report on activity-related issues will increase as our knowledge increases through further research, access to relevant data is enhanced, and tools to assist interpretations are better exploited. Improvement opportunities will be achieved sooner, if more laboratories and agencies accept the need to invest in these aspects as well as the training of practitioners.

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Section: Source and Freshness /Moisture Contentmentioning

confidence: 99%

DNA transfer in forensic science: A review

Oorschot

Szkuta

Meakin³

et al. 2019

Forensic Science International: Genetics

214

130

View full text Add to dashboard Cite

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“…As stated by Laan et al [69], it's possible to distinguish five different drying stages, each with their own characteristics. The mass of a blood pool diminishes in a very reproducible manner, first linearly in time and then approaches a constant value.…”

Section: Pool Of Bloodmentioning

confidence: 99%

Drying colloidal systems: Laboratory models for a wide range of applications

et al. 2018

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Abstract. The drying of complex fluids provides a powerful insight into phenomena that take place on time and length scales not normally accessible. An important feature of complex fluids, colloidal dispersions and polymer solutions is their high sensitivity to weak external actions. Thus, the drying of complex fluids involves a large number of physical and chemical processes. The scope of this review is the capacity to tune such systems to reproduce and explore specific properties in a physics laboratory. A wide variety of systems are presented, ranging from functional coatings, food science, cosmetology, medical diagnostics and forensics to geophysics and art.

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“…Certainly, evaporation and coagulation can significantly affect slower aspects of BPA such as the drying of pools of blood (8), the evaporation of sessile drops with microliter or larger volume, the formation of drip trails, and wicking in fabrics. These situations can exhibit time scales on the order of minutes as well as enhanced evaporation at contact line and can thus be influenced by evaporation or coagulation.…”

Section: Editormentioning

confidence: 99%