How did you control any external variables in this experiment? External variables were controlled in the blood spatter lab through the use of several different materials. The clamps and stand prevented the blood from falling at different heights and angles, and the pipette prevented different volumes of simulated blood from falling. The stand and clamps and the pipette helped control the outside variables so the results could be as accurate as possible. 2. If a violent murder occurred as the result of the killer wielding a weapon over his or her head or from side to side would result in a line of blood spots on the ceiling or wall, similar patterns on walls could be the result of the victim being flung across the room. If the victim crawled
In Blood In Blood Out is a drama directed by Taylor Hackford, and starring Damian Chapa (Miklo), Benjamin Bratt (Paco), and Jesse Borrego (Cruz), produced by Hollywood Pictures. The film was based off everyday life in East Los Angeles, from the 1970’s through the 1980’s. Damian Chapa stars as Miklo in the film, a Mexican-American who wanted to be accepted, not by his skin but for the Mexican within him. Benjamin Bratt (Paco) was the older cousin of Miklo, who learned his lesson throughout the movie and changed his ways. Jesse Borrego (Cruz) is the step-brother of Paco who was a talent artist, who ended up turning to drugs because of back problems caused by a rival gang incident.
Forensic Science Introduction: Someone in a restaurant has suddenly fallen ill and a mystery powder has been discovered with the victim. As the chief investigator, your duty is to identify the mystery substance through a lab. In this lab, it will consist of five known compounds and one unknown compound. Your job is to distinguish which one out of the five substances is the mystery powder. To figure out the mystery matter you will have to compare their physical and chemical properties and match them with the appropriate compound.
Three hundred and thirty-four years later in the future, Carl Landsteiner, a Viennese doctor, performed a very simple experiment with blood in 1901. During his experiment, Landsteiner noticed "clotting in some samples of mixed blood and not others". (Tucker, 10) Landsteiner separated his samples into three groups: A, B, and C, according to how they clotted in his experiment. Today, the blood type C is known as type O blood. When Landsteiner was grouping these blood types, he happened to look over type AB. AB occurs in about 3 percent of the population. Later in 1907, two researchers, Jan Jansky in Czechoslovakia and William Lorenzo Moss in the United
She said that the distribution and condition of her blood was consistent with repeated blows from a heavy object. She was struck fifteen times in the head left with a pool of blood on the floor. Blood was found all over the living room and the kitchen and her hands appeared to
The idea is to get a sort of background story from the random blood distribution. The different types of blood can tell us the method an assailant uses, such as passive blood stains. These stains are made from the drops of a weapon due to gravity. For instance, if an attacker walked away from stabbing someone, the weapon would leave a series of drops.... ... middle of paper ...
Bloodstain Pattern Analysis is a forensic discipline which, among others, the position of victims can be determined at crime scenes on which blood has been shed. To determine where the blood source was, investigators use a straight-line approximation for the trajectory, ignoring effects of gravity, drag and overestimating the height of the source. We determined how accurately the location of the origin can be estimated when including gravity and drag into the trajectory reconstruction. We created eight bloodstain patterns at one meter distance from the wall. The origin’s location was determined for each pattern with: the straight-line approximation, the method includes gravity, and the method we use includes both gravity and drag. The latter
Purpose: The purpose of this lab was to identify blood types by using the blood type kit provided and referring to the hand out in order to see how the blood stains should appear on Anti-A, Anti-B, Anti-C and the control.
Blood is a fluid connective tissue that circulated around the body. Blood is primarily used to transport medium for the maintenance of homeostasis (Mader, 2010). Blood transports oxygen and carbon dioxide, nutrients and wastes, metabolic substrates and hormones between organs and tissues. Blood also involves in defending against the pathogens and infections, and blood loss. Blood helps to regulate the body heat, maintain its own water-salt balance, and provides a buffer for acid-base balance.
Does the name “raining blood” scare you? Well, never fear, because it is not a Stephen King movie; in fact, it is a very cool science experiment, including the different measurements of density, or how fast, slow, or accurately two liquids mix. Do you want to engage in a fun and very simple project? If you said yes to my question then hold tight, listen carefully, and follow these simple steps!
I took pictures of all of the blood stains and collected the knife and fork as evidence.
Solid A was identified to be sodium chloride, solid B was identified to be sucrose, and Solid C was identified to be corn starch. Within the Information Chart – Mystery White Solid Lab there are results that distinguishes itself from the other 4 experimental results within each test. Such as: the high conductivity and high melting point of sodium chloride, and the iodine reaction of corn starch. Solid A is an ionic compound due to its high melting point and high electrical conductivity (7), within the Information Chart – Mystery White Solid Lab there is only one ionic compound which is sodium chloride, with the test results of Solid A, it can be concluded that is a sodium chloride. Solid B was identified as sucrose due to its low electrical
In order to reconstruct a crime scene, analysis must classify the bloodstain spatter, and there are many way to classify blood stain patterns: bloodstain spatter by velocity and bloodstain through taxonomy. In the classification of the bloodstain spatter by velocity, there are three basic categories of stain groups...
Blood stains are one type of evidence that can be found at a crime scene. Blood that is still in the liquid form should be picked up on a gauze pad. Once the blood is dried thoroughly it should be refrigerated and sent to the Laboratory (Andrus et al., n.d., para. 1). If the blood stain is found dried on clothing, the officer should wrap the piece of clothing in clean paper and place it in a sealed and labeled container. An object with dried blood stains needs to be sent to the Laboratory if it is small enough. If the object is too large to send, then using a clean knife the stain needs to be scraped onto a clean piece of paper, which then can be folded and placed in an envelope (Andrus et al., n.d., para. 2). When collecting autopsy blood samples, the officer should request that the pathologist obtain the sample directly from the heart and place it in a yellow or purple stoppered vacutainer. If the victim is still alive but in serious need of a blood transfusion, then the pre-transfusion blood sample needs to be obtained promptly before the hospital discards it (Andrus et al., n.d., para. 4). It is important for the Laboratory to receive all blood samples within 48 ho...
Blood spatter analysis is the blood evidence examined to draw a conclusion of how the incident may have occurred. This evidence also helps examine the patterns of the blood to see how
run a blue top and base your platelet count off of that tube instead of the purple. The