Forensic Science and Technology (ISSN:1008-3650)

The mixed stain of seminal and vaginal substances is significant evidence commonly found in sexual assault cases. How to isolate the involved perpetrator’s sperm and obtain its STR profiles is always the key to solving the relevant issue and the task any forensic DNA laboratory has to tackle. Many techniques have been invented to deal with the mixed stain, but the mainstream choice presently used in domestic laboratories is the differential lysis or its modified version. Although the methods mentioned above are of simple principle and low cost, they have still tended to bear some disa

Human intestinal tract accommodates the most varieties and quantity of microbes in human body, establishing the colonies of bacteria, viruses, fungi, archaea and eukaryotes that have come into being the so-called human gut microbiome (HGM). Evidently, HGM is characteristic of enormous amount of microbes, long-duration stability and liability of individual specificity, hence making it promising to arise as a novel biomarker for forensic personal identification. Factually, the explosion of microbiomics research occurred along with the availability of high-throughput sequencing in the last dec

Nitroglycerine (NG), also known as glyceryl trinitrate, can be used to make explosives and gunpowder. The NG-derived explosive is usually of great energetic power. At present, nitroglycerin is mainly determined with gas/liquid chromatography-mass spectrometry. However, nitroglycerin is prone to complete explosion, high heat sensitivity and easy volatilization, resulting in the existing laboratory technology difficult to detect the NG-derived explosive eligibly. Fortunately, fluorescence detection can have the NG-drived explosive residues determined sensitively and rapidly. Here, a set of ph

A survey was here carried out about high-falling cases so that the influential factors were able to explore on the time spent with the cases' scenes, purposing to provide a theoretical and practical basis for rapid investigation into the scenes of involving cases. The high-falling cases that occurred in the selected district from June 1st, 2014 to May 31th, 2018, were collected and analyzed statistically. In total, 318 pieces of such cases were reviewed, having them kept into groups with the victims' gender and age, locations where cases happened, heights of high-falling, time spent

Mass spectrometry imaging is a new approach of imaging technology, capable of providing rich in situ spatial distribution information about the analyte. Desorption electrospray ionization (DESI) - mass spectrometry imaging (MSI) has in recent years been focused owing to its merits of ambient operation, simple pre-processing, less damage to the treated sample and high throughput. DESI plays its role through the solvent (usually methanol or isopropyl alcohol) being sprayed onto the surface of sample via capillary atomizing at open natural environment so that the desorption and ionization coul