Hair Evidence in Forensic Science Hair is an important part of our body. It can be found anywhere and can be a useful evidence in forensic science. It consists of three layers, namely cuticle, cortex and medulla. Cuticle- is a covering that consists of hard scales made of keratin, which is a protein approaching tip ends of the hair. There are three types of cuticle: coronal, imbricated and spinous types. Cortex consists of stretched out beam shaped cells, buried with pigment granules for hair to
Making a Wet Mount Slide Purpose: The purpose of this lab experiment is to learn how to make a wet mount slide and observe it under a microscope. Materials: The materials used in the lab experiment were… 1. Microscope 2. Microscope slide 3. Coverslip 4. Newspaper 5. Scissors 6. Medicine dropper 7. Water 8. Forceps Procedure: The procedure followed in this experiment were… 1. Cut a small "d" from the newspaper and place it in the center of a clean microscope slide so that it is in
Compound Light Microscope is a tool used to make images larger of small objects that are hard to study with your eyes. The compound light microscope, which is going to be used in this lab activity, is an instrument with two lenses and various knobs to focus the image. In this lab, we will learn about the microscope and how to properly use it (Kim, 2001). Anton van Leeuwenhoek (2001) was the first person to observe and describe single celled organisms by using handcrafted microscopes. He originally
completing this lab was to observe how microscopes function. The invention & evolution of the microscope has been an ongoing process since the Middle Ages, when the first convex magnifying lenses were introduced. In 1590, the Jansen Brothers invented the first compound microscope (two or more lenses).However, Antony van Leevenwenhoek created the first “true” microscope, in 1665, with 300x magnification & unbelievable resolution. During the late 1700’s, the microscope was reinvented with 1500x magnification
we had been able to learn the proper technique of using the optical microscope and preparation of different types of slides. Optical microscope, often referred to as light microscope, is a type of microscope which uses visible light and a system of lenses (4X, 10X, 40X and 100X) to magnify images of small samples. Image from an optical microscope can be captured by normal light-sensitive cameras to generate a micrograph. Microscope is one of the best technology provide information such as the staining
The word microscope is often used to define an instrument used for viewing small objects, such as bacteria, minerals, and cells that can’t be seen with the naked eye by magnifying them using a series of lenses. Microscopes vary from models and styles, but each consists of similar parts including lens, eyepiece, stage, adjustment knobs, light, nosepiece, and arm. The eyepiece allows an individual to look through it to view samples. Usually the magnification of an eyepiece 10x. The arm supports the
the positive result, we continue our activity by characterization of bacteriophage. This activity is expected to take about 2 month since we need to do several repeating processes including culturing the bacteriophage, staining and observing under microscope. For the next step, we will take about 3 months for studying the biocontrol effect of bacteriophage toward Salmonella. This period is the longest among the activities that we will do because this activity involving try and error method where we
have denatured and rate of metabolism will have stopped or decreased sufficiently to have stopped the daphnia's heart rate. Apparatus list Test tube Beaker Different temperatures of water Daphnia Pipette Stop clock Microscope Slide Safety Follow usual lab safety rules. There are no major safety considerations in this experiment as the daphnia aren't harmful and water above 40ËšC will not be used. Method To determine if temperature does have an effect on the
Arabidopsis Culture Cell and Transformation Arabidopsis thaliana (L.) Columbia ecotype suspension- cultured T87 cells were maintained at 22°C in JPL3 medium with continuous illumination and shaking at 100g. Two-week-old cells were sieved through 500 μm stainless mesh and the remaining filtrate was transferred to a flask containing 20 ml of fresh JPL3 medium for subculture. Transformation of T87 cells was done by culturing the cells in B5 medium supplemented with 1 μM 1-naphthaleneacetic acid (NAA)
do this by placing the water flea under a microscope and count its heartbeat. I will be able to do this because the water flea is translucent and I will be able to see its heart beating. I will do it for fifteen seconds, then multiply the result by four to get a minute worth. Method Using a seeker place a small blob of grease in the cavity slide and smear it thinly in the cavity. Place a small drop of water in the slide and then transfer a large daphnia into the
and hypertonic solutions during an experiment using onion cells. Both onion cells were placed onto a microscope slide, a drop of water (hypotonic solution) was then added to slide A, and a salt solute (hypertonic solution) to slide B, below are photos that were taken of the cells during this experiment. [IMAGE][IMAGE] Slide A Slide B
explanation of how muscle contractions occur. This theory states that the actin filaments within the sarcomere slide toward one another during contraction. But, the myosin filaments don’t move. The second type of muscle is smooth, which is found in internal organs and blood vessels. It consists of collections of fusiform cells that don’t show its striations under even a light microscope. The most common function of this muscle is to squeeze, which puts forth pressure on the space inside the
and using the microscope. We performed various activities that enabled us to familiarize ourselves with the parts and uses of the microscope. Using the microscope, we observed different objects such as cotton, silk, hair, and even a letter "e." We viewed it using both the low power objective and the high power objective. We did these activities in order to better understand how the compound light microscope works and also to learn about the different procedures in setting up a slide. The results of
they cannot be seen with naked eyes and therefore need to be magnified. Light microscopy was first used to magnify the image of the cells using stains. However, some tissue and subcellular structures are too small to be seen even under the light microscope. Therefore another technique was found to visualise the cell in more details. To study the smaller features of the cell, electron microscopy are used. Electron microscopy use electron beam to visualise the specimen. Electron microscopy can only
Verisimilitude in The English Patient One critic has written, "Ondaatje has always been fascinated by history - seen as a series of arcane stories about the past. In his hands, even the documents of history slide away from factual representation toward a haunting apprehension of indeterminacy." (Barbour 207). In The English Patient Ondaatje blends fiction and history into a socially conscious story. Verisimiliude is the aspect of belivability present in a novel. Ondaatje's use of the element of
the ongoing trials because no one else will. He then discovers that Mary Warren, the family’s servant knows much about the trials because of her role as an officer of the court. “‘You’re coming with me, Mary, you will tell it in the court…We will slide together into our pit; you will tell the court what you know.’’’ (80). John discovers that Mary knows that he witchcraft accusations are false. He then comes to this decision that it is his responsibility, as well as Mary Warren’s, to tell the court
rather than pain or destruction" (Meyers, 414). The narrator's inability to cope with disagreeable thoughts such as her father's possible death is evidenced early in the novel. The narrator states: "nothing is the same, I don't know the way anymore. I slide my tongue around the ice cream, trying to concentrate on it, they put seaweed in it now, but I'm starting to shake, why is the road different, he shouldn't have allowed them to do it, I want to turn around and go back to the city and never find out
days. He knew he was out of luck. I, on the other hand, felt content when I awoke to the sounds of "drip, drop, drip, drop" on my window pane. I looked out the sliding glass door and watched large drops of rain pour down the plastic Little Tikes slide on the back patio. Each drop appeared to be racing toward the bottom before the others. I loved watching the "drip races." My siblings and I used to bet on the drips. My mind was revisiting my childhood. The rain always does that to me. Nostalgia,
present as are other standard surgical tools, but the suture threads are almost invisible, the needle thinner than a human hair. And all the surgical activity revolves around the most important instument, the microscope. The surgeon will spend the next few hours looking through the microscope at broken blood vessels and nerves and sewing them back together again. The needles are so thin that they have to be held with needlenosed jeweller's forceps and will sew together nerves that are as wide
Many things defined 16th and 17th century Europe. Most recall it to be the era of the Renaissance; of Queen Elizabeth I’s reign; of a time where industry took its first steps and people no longer thought the world to be flat. It was an era that led to the way we live today. But perhaps one of the most essential contributions to modern day society to come from this period of time is the technology. People have been creating things since the dawn of time itself. Ever since we humans took our first