Article
Medicine, Legal
Liam Robinson, Belinda K. Bunn, Ryan Blumenthal, Herman Bernitz
Summary: The presence of hypopigmented bitemark patterns can be useful in forensic investigations, irrespective of the individual's skin color. However, the process of aging bitemarks on the skin lacks consensus and guidelines. This report analyzes tissue samples from a hypopigmented bitemark using special staining techniques and immunohistochemical markers to understand the aging process. The histologic evaluation confirms that cellular changes in the hypopigmented area indicate wound healing over time, supporting the hypothesis that a hypopigmented bitemark indicates a wound inflicted days before. These findings have significant implications in forensic investigations, especially in cases of suspected long-term physical abuse.
INTERNATIONAL JOURNAL OF LEGAL MEDICINE
(2023)
Article
Medicine, Legal
Soren Kottner, Martin M. Schulz, Florian Berger, Michael Thali, Dominic Gascho
Summary: Multispectral photography is widely used in forensic investigations for detecting latent evidence and enhancing visibility. Despite the recent advancements in 3D full-body documentation, the benefits of 3D imaging beyond the visible spectrum are not well known in forensic medical investigations.
FORENSIC SCIENCE MEDICINE AND PATHOLOGY
(2021)
Article
Chemistry, Analytical
Samuel Miralles-Mosquera, Bernardo Alarcos, Alfredo Gardel
Summary: This paper presents the use of a modified conventional camera to capture multispectral images, combined with wavelength filters, capturing angle, and illumination sources, for locating latent forensic traces. By using a multispectral camera and the expertise of forensic professionals, hidden evidences can be made visible, which cannot be detected by the human eye.
Article
Medicine, Legal
Astrid Winnepenninckx, Elke Verhoeven, Steve Vermeulen, Bram Bekaert
Summary: Infrared photography is an effective method for detecting latent bloodstains on various materials, especially fabrics. However, it is not as effective on materials such as leather, tiles, and wood. Additionally, the time of bloodstain deposition does not significantly affect the ability of infrared and visual light to detect latent bloodstains.
FORENSIC SCIENCE INTERNATIONAL
(2022)
Article
Medicine, Legal
Abraham Johnson, Gargi Jani, Rachael Carew, Astha Pandey
Summary: This research validated the metric precision of 3D printed replicas of human teeth, finding that they were accurate to within 0.5 mm of the actual teeth. Digital Light Processing (DLP) prints were recommended for potential forensic odontology applications based on measurements, digital comparison, and ease of use.
FORENSIC SCIENCE INTERNATIONAL
(2021)
Article
Medicine, Legal
Belinda Bastide, Glenn Porter, Adrian Renshaw
Summary: This study found that blood exposed to intense heat has more optimal spectral characteristics within the infrared range. Changes in appearance, viscosity, and infrared absorption properties of blood exposed to different temperatures in fire were observed qualitatively and quantitatively. The results suggest that reflected infrared photography may be an effective tool for bloodstain recovery at arson scenes involving fire.
FORENSIC SCIENCE INTERNATIONAL
(2021)
Article
Chemistry, Physical
Yu-Hsuan Chen, Yueh-Kuei Cheng, Yuan-Pern Lee
Summary: The addition reaction of halogens to alkenes is crucial in organic synthesis, with the structure of the intermediate bromoethyl radical, whether it is bridged or open form, being unclear. Researchers successfully recorded and analyzed the IR spectrum of the bromoethyl radical intermediate using the diminished cage effect of solid p-H-2 and IR absorption technique.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Inorganic & Nuclear
Li Li, Li-Min Lu, Xian-Hao Zhao, De -Yuan Hu, Tian -Yu Tang, Yan-Lin Tang
Summary: In this study, the structure, vibration, and excited states of glucose and fructose molecules were calculated using density functional theory. The results showed that the structure of glucose molecule was more distorted, and the stretching vibration of C=O bond in fructose was stronger. The absorption peak of fructose belonged to the tail absorption band, while other peaks belonged to the far ultraviolet absorption band. The excitation mechanisms of different excited states were determined through electron-hole analysis. This study could provide theoretical support for drug development, biofuel preparation, and metal protection.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Review
Dentistry, Oral Surgery & Medicine
Giuseppe Alessandro Scardina, Fabio Massimo Sciarra, Pietro Messina, Giuseppe Alessandro Scardina
Summary: This study aims to highlight the characteristics, typologies, and production mechanisms of bitemarks, describe and compare the different identification analytical methods, and underline the current trends of the international scientific community. It found that the practice of using bitemarks as judicial evidence has raised critical issues, leading to unjust conviction of defendants.
Article
Spectroscopy
Liu Xian-yu, Yang Jiu-chang, Xu Ya-fen, Xu Chang, Chen Quan-li
Summary: This article investigates the spectral characteristics of scheelite samples from the Xuebaoding deposit in Pingwu County, Sichuan province using conventional gemological characteristics, infrared spectroscopy, Raman spectroscopy, ultraviolet-visible spectroscopy, and fluorescence spectroscopy, in order to clarify the gemological characteristics of scheelite in this area.
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2023)
Article
Medicine, Legal
Matthew E. James
Summary: The study investigated the use of alternate light source photography for bloodstains on fabrics, finding it to be a viable method before chemical detection. Infrared light, followed by violet light without a filter, was found to be the most effective for viewing bloodstains on dark fabrics without chemicals.
JOURNAL OF FORENSIC SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Qingmei Fan, Jie Li, Jiaojiao Yang, Yayun Zhou, Qiang Zhou, Zhengliang Wang
Summary: NIR A2KAlF6:Cr3+ (A = Rb, Cs) phosphors prepared by co-precipitation exhibit broad excitation and emission spectra in the visible and near-infrared range, and possess high efficiency and thermal stability.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Biochemistry & Molecular Biology
Leticia Rubio, Juan Suarez, Stella Martin-de-las-Heras, Sara C. Zapico
Summary: This study aims to assess the correlation between changes in the mineral composition of human teeth and the estimation of postmortem interval (PMI). X-ray diffraction (XRD) and attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy techniques were used. The results showed that the parameters of crystallinity, crystal size, mineral-to-organic matrix ratio (M/M) and carbonate/phosphate ratio (C/P) had the strongest association with PMI.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Environmental Sciences
Siwei Yu, Yifeng Xu, Chuanzhou Liang, Wenjing Lou, Lai Peng
Summary: This study investigated the impact of various spectral bands of an incandescent lamp on the growth, protein content, and enzyme activity of Purple non-sulfur bacteria (PNSB). It was found that the full spectrum of the incandescent lamp was more favorable for PNSB cultivation compared to segmented spectral bands. Biomass and protein production under the infrared (IR) spectral band were slightly lower than the full spectrum, but significantly higher than the visible spectral bands. Enzymatic activities showed consistent trends with PNSB biomass, suggesting that spectral bands can affect PNSB growth through the Calvin cycle and photophosphorylation process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Materials Science, Multidisciplinary
Zixuan Liao, Junhui Miao, Jun Liu, Lixiang Wang
Summary: This study reports all-fused-ring molecules with electron ADA'DA configuration for VONIRT material applications. By regulating the intramolecular charge transfer effect of the molecules, wide absorption spectra spanning from 400 to 800 nm with the full width at half maximum of 299 nm are realized. These molecules exhibit excellent photo-stability and can be used to fabricate VONIRT optical filters that selectively block visible light and allow NIR light transmission.
SCIENCE CHINA-MATERIALS
(2023)
Article
Medicine, Legal
Heitor S. D. Correa, Ivano Alessandri, Andrea Verzeletti
Summary: This research assessed the usefulness of Raman spectroscopy and gas chromatography-mass spectrometry in analyzing bones. The techniques were found to be useful in molecular taphonomy studies and forensic genetics.
FORENSIC SCIENCE INTERNATIONAL
(2024)