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
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
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
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
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
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
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
“When he lifted his head a little, he saw his vaulted brown belly, sectioned by arch-shaped ribs, to whose dome the cover, about to slide off completely, could barely cling. His many legs, pitifully thin compared with the size of the rest of him, were waving helplessly before his eyes.” Gregor Samsa has gone through a metamorphosis. This change has turned Gregor into a “monstrous vermin”. The anxieties, inner terrors, and cynicism, which fill Gregor’s life, are expressed by Kafka throughout the novel
graders into the chapel for a special program. One of the teachers had prepared a slide show to demonstrate the effects that a sexually transmitted disease had on the human body. The first several pictures were not too bad, showing not much more than some bumps around a girl's mouth. As the show progressed, the slides got more gruesome. A man's genitals with large sores displayed the effects of herpes. Another slide showed the bottom of a girl's foot that had a hole the size of a quarter in it, the
Place the aluminum cylinder and note the final volume, V final. Record the mass of the aluminum cylinder, water, and graduate in the data table. 3. Repeat step 2, filling the 50.0mL graduate cylinder to the 30.0mL mark with tap water, tilt and slowly slide the irregular solid to the bottom. Record the initial and final volumes in the data table. Record the mass of the solid, water, and graduate in the table. 4. Fill the graduate cylinder to the 30.0mL mark with tap water. Remember to read the bottom
sights and killed nearly one hundred people, and covered a small town near Alberta with ice and snow. Another devastating avalanche incident is the 1964 Sherman slide, in which a huge avalanche was triggered by the 1964 Alaskan earthquake. The slide spilled out onto the Sherman glacier, during the big slide several other smaller slides happened and those were the one that took lives in Anchorage, and destroyed property There are a couple of types of avalanches and how the destroy so much this
Mountain Biking I have come to love bicycles in the course of the past year. I am especially fond of mountain bikes, including my own. Riding it opens up a whole new world of opportunities and challenges for me. I am still fairly fresh to the whole mountain biking scene, so I push myself to become better with more experience. Riding is an outlet; it is something I can channel pent up energy through. I love the sport because it is a full body, soul, and mind experience that affects all five
in the tunnels and caves of cardboard boxes and secret hideaways under the kitchen table. Our house has never been short on toys (there were six kids born before Katie and me), but boxes have always been a favorite. I remember being able to easily slide through the long passageways, my back not even brushing against the "ceilings" of our tunnels and forts. Katie had an even easier time ... ... middle of paper ... ..., on the right, Horseshoe Falls bubbles under a mist that slowly rises above the