- Full text PDF available (1)
- This year (0)
- Last 5 years (0)
- Last 10 years (1)
Journals and Conferences
The use of a Nanospec 10 S microspectrophotometer to examine minute bloodstains is discussed. To satisfy criteria for chemical identity, absorption spectra were recorded before and after treatment of the blood with Takayama reagent. The technique is of value where only tiny particulate bloodstains are available for testing and in other specialized instances.
Fibres used in forensic casework suffer from a disadvantage common to other forms of trace evidence--it is not possible to state with absolute certainty that they originate from a specific source. Target fibre studies, population studies and research on 'blocks of colour' have effectively demonstrated the polymorphism of textile fibres (particularly… (More)
Forensic scientists are faced with the problem of estimating the frequency of cotton fibres recovered in casework, in relation to those in the general population. One way of doing this is to consider the degree of spectral variation that occurs within a "block of colour". When a spectral pattern occurs very frequently, the evidential value of the fibres may… (More)
The current emphasis on DNA technology in forensic science has led many to believe that trace evidence examinations, including fibers, may be of little value. Reasons are given here to show that this is an erroneous assumption. In the face of this situation, fibers examiners have been challenged to consider ways in which they can improve the services they… (More)
Recently, attention was again drawn to the use of microspectrophotometry to distinguish between fibres dyed with indigo and seven derivative dyes. Under normal circumstances, fibres dyed with indigo (Vat Blue 1 or CI Number 73000) are not included in fibre-transfer examinations as, being ubiquitous, they do not usually have any evidential value. Indigo… (More)
An improved technique for recording infrared spectra from minute amounts of synthetic fibers by using KBr micropellets is described. The procedure is the same for all commonly encountered synthetic fiber varieties; hence, no preliminary identification is required.
Most forensic scientists are well aware of the traditional situations in which fibres may be used to provide evidence in criminal cases. Increased emphasis on DNA analysis has meant that fibres examiners must consider new ways in which their service to the criminal justice system can be improved and extended. These changes can be divided into four… (More)
The techniques used for present day recovery, examination, and comparison of textile fibers in forensic science are outlined. The author has not concentrated on the already well established theories of transfer and persistence and the basic methodology, as these topics have been repeatedly reported in detail relatively recently. Instead he has given his… (More)
The improved quality of spectra recorded using FTIR-microspectroscopy has meant that a lot more information is now obtainable from the spectra of dyed acrylic fibres. In addition to the main absorptions produced by the polymer material, additional absorptions resulting from the fibre dye are often present. An attempt has been made to explain some of the… (More)