Identifying Human Hair and Animal Fair by Laser Diffraction

3 different samples of hair was extracted from 3 suspects of the murder and were compared to a hair left at the crime scene of Mr Mowder (Evidence Hair). The Evidence Hair had a blonde color to it with a slight shade of light brown. It’s dimension was thin and had no presence of medulla. Suspect A’s hair sample was also blonde with slight shades of light brown. It’s width was thin with no presence of medulla. Suspect B’s hair was Dark Brown with a shading of light brown. The hair was thick and had the presence of medulla. Suspect C’s hair was Blonde like Suspect A’s but had a shading of light grey. It was also thin like suspect’s A and had no presence of medulla. Among the suspect’s, suspect A and suspect C had the most resemblance to the evidence hair. Suspect B had dark

At the scene of the crime a hair was found near Anna Garcia. After viewing and testing the hair, we concluded that the hair belonged to Erica. The unknown hair had the exact same thickness and color of Erica’s hair. The hair at the crime scene had a similar cuticle to Erica’s. Both Erica’s hair and the one at the crime scene had the same cortex as well. We believe that Erica’s hair was brought to the crime scene on a piece of clothing by Alex Garcia(Anna’s ex-husband). When Alex came to murder Anna a hair of Erica’s must have fallen off when Alex was doing his deed.

3 samples of hair are picked from 3 suspects that maybe the murderer of Mr.Mowder. Another sample of hair was extracted from the crime scene left by the killer. Under the microscope, 4 samples of hair were observed. Sample A or Schwab’s hair sample was light brown, wide, had a presence of medulla, and dark shadings on both sides of the hair. Sample B or Clark’s hair was darker, thinner than Suspect A’s, and still had presence of medulla.The shading was uneven on the sides. Sample C or Klotz’s hair was light blonde or grey, wide, had no presence of medulla, and no shading. Finally the hair sample found on the body of Mr.Mowder was light brown, wide, had presence of medulla, and dark shading on the sides. Sample C was widely different from the other hair samples due to its color. Samples B, C and the victim hair are more similar due to it’s

Light passed through a transmission grating is often sent in all directions due to interference. The grating acts as a new wave source and causes the light to travel in different paths. Equation 1 below shows the relationship between path difference and light direction due to constructive interference. D represents the line spacing and sinƟ=a/c according to the drawing below.

First, we discovered that we should start with low power objective to observe. To focus the image, use the coarse adjustment knob to adjust it. When looking at high power objectives, the fine adjustment knob can be used. Also we discovered that when you move the slide towards you, it appears to move away. When observing the letter “e”, we discovered that the images observed under the light are inverted and reversed. Although we could not easily tell with the feather, threads, and potato, it became noticeable with the letter “e”. The “e” was placed like “e”, however when looked into the eyepiece, the “e” was upside down. This shows that the microscopes works in an inverted way. We also discovered that to adjust the amount of light entering the microscope, we could use the iris lever to adjust the diaphragm. For example, the white thread required little light to see the cotton fibers, compared to the feather or letter “e”. Therefore, we learned that by altering the diaphragm, we can fix many of the problems associated with the observations. Lastly, we discovered that only one depth can be seen clearly at a time under high power. When working with the crossed strands of thread, we had to turn the fine wheel adjustment back and forth while looking through the microscope to focus one strand. All in all, the lab supported the purpose. We were able to identify,function the parts of a light microscope, and prepare a wet mount(of a feather, letter “e”, black and white thread, and a potato). Furthermore, we located objects using high and low power objectives, adjusted the diaphragm to attain correct lighting, and used stains for an easier and more detailed

Trichology is the study of hair. Interestingly, this study dates back to mid-1800s. However, hair analysis in forensic science began in 1930. During which time, a forensic scientist by the name of Edmond Locard introduced the Locard Exchange Principal. This principal hinges on the fact that any time there is contact between two surfaces an exchange of material will take place. (Oien, 2009) In this paper, I will prove how Forensic Hair Analysis and Forensic Hair comparison and studies if properly performed and correctly interpreted hair analysis meets all the scientific method standards.

Examples of waves include sound waves and light waves. Refraction is seen most often when a wave passes from one medium to a different medium. Different types of medium include air to water, and glass to water. There are different kinds of refractions, there’s the specular refraction. Light reflects at the same angle at which the light strikes the surface.

The bending of waves as they pass from one form of matter to another is refraction. When light travels from an object to one’s eyes, it makes the object seem to be in a different location. As waves access a new medium. they travel at a different rate in the alternative medium. For instance, light waves travel at a lower rate in water than in air. The

As long as you are aware of the type your hair type, it is easier to care for the specific hair and maintain attractive and healthy looks. Being aware of your hair type will enable you to style, cut and handle your hair more effectively. You will be able to choose hairstyles that are perfect for your hair type and achieve the exact results that you have been dreaming of.

Given the choice, the only place most women would have hair would be on their heads and eyebrows and the rest would disappear into a cloud of dust, never to be seen again. Sadly that won’t happen any time soon so most women end up spending hours and hours of their precious time shaving, waxing, plucking and putting up with lots of painful treatments to remove unwanted hair.

Males can weigh up to more than twice as much as females and be more longer. They have a coat that is a cream color with back layers. In winter their coats are thick smooth and glossy. In the summers they shed there coats which becomes thin and faded and they lose the winter gloss. Polecats have a raccoon like dark mask around their eyes and white are there ear's. Polecats have a pair of anal glands that emits a strong smell. When polecats are excited or threatened they release some of the glands. Polecats are lean,and have short legs which are for climbing trees . Their skulls are box like and it's also more canine,like other weasels; their faces more closely resemble minks than weasels. European polecats show a lock position with there jaws where the jaw joint between the teeth and the rest of the skull is nearly closed off very difficultly and hard to separate and death occurs.

On October 18, 1977, James Anagnos was found dead in his bar. The suspect was Frank Wright, who detectives learned was in an argument with Anagnos a few hours before closing time. Anagnos had a chunk of hair in his hand, and it was sent to a secret laboratory in Texas to get tested. Later the DNA confirmed that the hair belonged to Wright.

Laser hair removal produces long-final results and easy, silky pores and skin , and it's also very inexpensive.

A: All over the world, Diode lasers are the gold standard for Laser Hair Reduction. There are other different lasers available like Nd:YAG and IPL but none meets the results as seen with Diode lasers.

“Primate is the order of warm blooded animals that includes prosimians and anthropoids.” (Bonvillain and Miller 2013: 318). As an example, in the same way as monkeys and apes. “The hominids are also the members of the order Primates” (Bonvillain and Miller 2013: 251). When people comparing human with other primates, the first mind come into people’s thought is body hair, since the body of hair is one of the most unique changes from apes to hominid evolution. Besides, “a Humans skin is the most visible aspect of the human phenotype. It is recognized principally by its naked appearance” (Jablonski 2004: 585). People likewise always ask a question that why the body hair of people have disappeared, however why people still have so much hair on our heads? Most researchers believe that hominid especially for modern human does not require such a great amount of hair to keep body warm and bare skin plays a significant role in sexual selection.