Search results for "Forensic"

Human umbilical cord expresses several vasoactive peptides involved in the local regulation of vascular tone: protein and gene expression of Orphanin…

2011

Full-term human umbilical cord contains three blood vessels: two arteries coiled around a vein and surrounded by Wharton’s jelly, a mucous tissue with few mesenchymal stromal cells and abundant extracellular matrix. Umbilical vessels lack innervations, thus endothelial cells must play a role in the control of blood flow. The aim of this study was to investigate in human umbilical cord the expression of five peptides that could be involved in the regulation of vascular tone: Orphanin FQ, Oxytocin, Atrial Natriuretic Peptide (ANP), endothelial Nitric Oxide Synthase (eNOS) and inducible Nitric Oxide Synthase (iNOS). The expression of these molecules in full-term human umbilical cord …

Expression of Cyclooxygenase-1 and Cyclooxygenase-2 in normal and pathological human oral mucosa

2011

Abstract: Cyclooxigenase (COX) is the rate-limiting enzyme for the conversion of arachidonic acid (AA) to prostaglandins (PGs). Two isoforms of COX have been identified: COX-1 is constitutively expressed in many cells and is involved in cell homeostasis, angiogenesis and cell-cell signalling; COX-2 is not expressed in normal condition however it is strongly expressed in inflammation. The oral cavity is costantly exposed to physical and chemical trauma that could lead to mucosal reactions such as hyperplasia, dysplasia and cancer. Early diagnosis is the most important issue to address for a positive outcome of oral cancer; therefore it would be useful to identify molecular markers whose expr…

Dati istologici essenziali relativi al tessuto osseo per applicazioni forensi

2019

The essential of bone histology for forensic applications

Copy–Move Forgery Detection by Matching Triangles of Keypoints

2015

Copy-move forgery is one of the most common types of tampering for digital images. Detection methods generally use block-matching approaches, which first divide the image into overlapping blocks and then extract and compare features to find similar ones, or point-based approaches, in which relevant keypoints are extracted and matched to each other to find similar areas. In this paper, we present a very novel hybrid approach, which compares triangles rather than blocks, or single points. Interest points are extracted from the image, and objects are modeled as a set of connected triangles built onto these points. Triangles are matched according to their shapes (inner angles), their content (c…

A tool to support the creation of datasets of tampered videos

2015

Digital Video Forensics is getting a growing interest from the Multimedia research community, as the need for methods to validate the authenticity of a video content is increasing with the number of videos freely available to the digital users. Unlike Digital Image Forensics, to our knowledge, there are not standard datasets to test video forgery detection techniques. In this paper we present a new tool to support the users in creating datasets of tampered videos. We furthermore present our own dataset and we discuss some remarks about how to create forgeries difficult to be detected by an observer, to the naked eye.

State of the art in passive digital image forgery detection: copy-move image forgery

2017

Authenticating digital images is increasingly becoming important because digital images carry important information and due to their use in different areas such as courts of law as essential pieces of evidence. Nowadays, authenticating digital images is difficult because manipulating them has become easy as a result of powerful image processing software and human knowledge. The importance and relevance of digital image forensics has attracted various researchers to establish different techniques for detection in image forensics. The core category of image forensics is passive image forgery detection. One of the most important passive forgeries that affect the originality of the image is cop…

Forensic Microbiology: A Case Series Analysis

2019

The importance of microbial colonization of human organs in a living body has long been assessed. What still remains unclear are the microbial changes occurring after death, thus leading to the advent of a relatively novel field of research called “Postmortem microbiology”. It is applied to several forensic fields such as post-mortem interval assessment and cause of death determination. In this contest, a major limit is thus represented by the correct interpretation of the microbial data and by the actual lack of standard procedures. Here we propose a standard operative protocol in order to avoid false positives given by contamination (the main problem), post-mortem translocation and agonal…

Predictive role of histological features and Ki67 pattern on high-risk HPV presence in atypical cervical lesions

2007

The most frequently detected alterations of squamous cervical epithelia consist of metaplastic/reactive conditions and human papillomavirus (HPV)-related dysplastic lesions. These latter are traditionally identified as cervical intraepithelial neoplasia (CIN1, 2 or 3) or, in the Bethesda System, as low-grade squamous intraepithelial lesions (LSIL), including CIN1, and high-grade SIL, including CIN2 and CIN3. Some HPV-induced lesions, which are not characterized by obvious dysplasia, are often diagnosed as LSIL. In these lesions, which are hereafter referred to as cervical atipical lesions (CAL), histological features of HPV infection (namely, koilocytosis, multinucleation, acanthosis, papil…

LA MORTE IMPROVVISA CARDIACA DI TIPO ELETTRICO: ASPETTI ISTOPATOLOGICI DEL TESSUTO DI CONDUZIONE CARDIACO

Intratympanic treatment with dexamethasone as first-line or salvage therapy in sudden sensorineural hearing loss: Results of a retrospective study

2014

Aim: Sudden sensorineural hearing loss is a condition of emergency in Otolaryngology. Although there is no universally accepted treatment protocol, corticosteroids, intravenous and oral, are the most common treatment The purpose of this study is to evaluate the efficacy of intratympanic administration of dexamethasone as first line therapy, or as a rescue therapy after treatment with systemic steroids in patients not responders. Methods: The population, consisting of 85 patients referred to our unit from January 2010 to December 2013, was divided into two groups according to the treatment protocol performed. We also analyzed possible variables that may affect the response to treatment such …