Serology and Blood Pattern Analysis
Criminal Justice 210 with Scheur at Michigan State University
About this deck
By: Abby Wroble
Textbook:
Fundamentals of Forensic Science
Created: 2011-11-03
Size: 39 flashcards
Views: 28
Textbook:
Fundamentals of Forensic ScienceCreated: 2011-11-03
Size: 39 flashcards
Views: 28
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have used this website for three exams, and I see a huge difference in my test results.”
Naj
Naj
Sign up (free) to study this.
Serology
Study of bodily fluids left at crime scene
Presumptive test
A test that is highly sensitive to, but not specific for a particular substance
Confirmatory Test
Tests positive for the substance in question and only that substance
Blood
Tissue, composed of several types of cells in a matrix called plasma.
Plasma
Consists of about 90% water and 10% of a long list of other substances
Erthrocytes
Red blood cell within plasma. Its purpose is to transport oxygen and carbon dioxide throughout the body via the circulatory system
Produced in bone marrow and have four-month life span
Produced in bone marrow and have four-month life span
Hemoglobin
Conjugated protein consisting of four polypeptides, each of which contains a heme group.
Leukocytes
White blood cell within plasma
Neutrophils
Type of Leukocyte that is part of the first line of defense and offers up a complicated response to invaders: the immune response.
Most abundant type of white blood cell
Most abundant type of white blood cell
Lymphocytes
Type of Lekocyte that is produced in bone marrow and thymus gland, the engender the immune response.
Produces antibodies
Produces antibodies
Antibodies
protein molecules that can bind to foreign molecules
Antigen
Any foreign molecules that induces antibody formation
Platelets
Cell within plasma, that fragments of cells and contains no nuclei.
They are involved in the clotting process
They are involved in the clotting process
Blood group
class of antigens produced by allelic genes at one or more loci and inherited independently of other genes
Phenolphthalein Test
Color changing presumptive test that can detect blood diluted down to 10^-7 and even decade old bloodstains can yield positive results
Tip turns pink when test is presumptive positive blood.
Luminol
Used for large scale presumptive testing. Reacts in the presence of hemoglobin.
Produces a blue-white to yellow-green luminescence if blood is present.
Produces a blue-white to yellow-green luminescence if blood is present.
Fluorescein
Used for large scale presumptive testing. Preperation contains thickener so it stays on surface better. Easier to use on walls.
Produces fluorescence if blood is present
Takayama Test
Confirmatory test that is very sensitive and will detect very old blood stains.
Heating sample is key to these tests!
Heating sample is key to these tests!
Brentamine Fast Blue B
Most common presumptive test for testing semen.
If intense purple color is obtained, test is positive
If intense purple color is obtained, test is positive
Christmas Tree Method
Confirmatory test for semen. Turns tip of sperms head pink, bottom of head red, middle portion blue, and tail yellow-green.
Hematoxylin/Eosin
Confirmatory test for semen. Turns head of sperm blue and the rest turns pink
Life span of sperm in vaginal tract
72 hours
Life span of sperm in rectum
6-65 hours
Life span of sperm in mouth
6 hours
Life span of sperm after intercourse
24-27 hours
Amylase detection and Radial Diffusion Test
Used in saliva test
Passive bloodstains
clots, drops, flows, and pooling
Transfer bloodstains
wipes, swipes, pattern transfers, and general contact bloodstains
Projected or impact bloodstains
Spatters, splashes, cast off stains, and arterial spurts or gushes
Wipe stain
Created when an object moves through a pre-existing bloodstain
Swipe stain
transfer of blood onto a target by moving object that is itself bloodstained
Spatter
results from blood hitting a target
Forward spatter
when blood droplets are projected away from the item creating impact, such as hammer
Back spatter
droplets being projected toward the item. These stains are lighter and smaller.
Cast off stains
results of blood being flung or projected from a bloody object in motion or on that stops suddenly.
Voids
an indicator that some secondary object came between a blood spatter and the final target
This leaves an outline or "shadow" on final target
Angle of impact
Acute angle created by the intercept of the target with the droplets vector
Directional angle
Angle between the long axis of the stain and a standard reference point
Determining point of origin
visual aids, from simple strings and pins to advanced forensic software.
About this deck
By: Abby Wroble
Textbook: Fundamentals of Forensic Science
Created: 2011-11-03
Size: 39 flashcards
Views: 28
Textbook:
Fundamentals of Forensic ScienceCreated: 2011-11-03
Size: 39 flashcards
Views: 28
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have used this website for three exams, and I see a huge difference in my test results.”
Naj
Naj