PDF-Investigation of a Model for Stain Selection in Bloodstain Pattern Analysis M

Illes and M Bou To whom correspondence should be addressed Department of Forensic Science Trent University 600 West Bank Drive Peterborough ON K9L Z7 Email mikeillestrentuca Department of Mathematics Trent University Peterborough Ontario Abstract Th. SIAK Journal Journal for Police Science and Practi Brodbeck Silke 2012 Introduction to Bloodstain Pattern Analysis SIAK RXUQDO573475758157347RXUQDO57347IRU573473ROLFH573476FLHQFH57347DQG Pr WARNING. Contains graphic images. Angle of Impact. The acute angle formed between the direction of a blood drop and the plane of the surface it strikes. . Arterial spurting (or gushing) pattern. . Bloodstain pattern(s) resulting from blood exiting the body under pressure from a breached . A stain is a substance that adheres to a cell, giving the cell color. .. The presence of color gives the cells significant contrast so are much more visible. . Different stains have different affinities for different organisms, or different parts of . The success or failure of any criminal investigation often depends on the recognition of physical evidence left at a crime scene and the proper analysis of that evidence.. Crime scenes that involve bloodshed often contain a wealth of information in the form of bloodstains.  The pattern, size, shape, and the location of such stains may be very useful in the reconstruction of the events that occurred. . BIOLOGY & BIOTECHNOLODY DEPARTMENT. In our laboratory, . bacterial morphology . (form and structure) may be examined in two ways:. By observing . living unstained organisms. (. wet mount. ).. 2. By . A stain is a substance that adheres to a cell, giving the cell color. .. The presence of color gives the cells significant contrast so are much more visible. . Different stains have different affinities for different organisms, or different parts of . Chapter 8. Blood Spatter . #1…it’s not “. splatter. ”! . . Properties of blood affect pattern:. Fairly . high surface . tension (cohesion). Very . viscous. Sticky-adheres . to external . surface (adhesion). Biology and Biotechnology department. Differential . stain separate bacteria into group . . Gram . Stain :. Differentiate bacteria into 2 groups:. Gram . positive bacteria . Gram . negative bacteria . 1. What type of bloodstain?. 2. What type of blood stain?. 3. What type of blood stain?. 4. . . What type of blood stain?. 5. What type of blood stain?. 6. What type of blood stain?. 7. type of blood stain?. Bloodstain Pattern Analysis Terms. Spatter. – Bloodstains created from the application of force to the area where the blood originated.. Origin/Source. – The place from where the blood spatter came from or originated.. Basic vs. acidic dyes. Differential Stain. Primary stain (stains all cells on slide). Decolorizing step (removes stain from certain types of cells). Counterstain (stains the decolorized cells). . SYFTET. Göteborgs universitet ska skapa en modern, lättanvänd och . effektiv webbmiljö med fokus på användarnas förväntningar.. 1. ETT UNIVERSITET – EN GEMENSAM WEBB. Innehåll som är intressant för de prioriterade målgrupperna samlas på ett ställe till exempel:. refractile. body within the vegetative cells. Procedure: (fig.10) . 1- Prepare a fixed smear.. 2- Flood the smear with 5% malachite green and let the stain react for 1 minute .Using your . bunsen. burner, heat the top of the stained slide until steam rises but do not let it boil. This step is performed by passing the burner back and over the slide for about 5 minutes.. SFS3 Students . will analyze the use of toxicology, . serology. , and DNA . technology in . forensic investigations. . d. . Differentiate the forensic techniques used to distinguish human and . animal .