Creating a new very specific hair color for each individual. Besides coloring hair requires a basic understanding of simple chemistry, and what happens to the hair once the chemicals have been applied to the hair shaft. In fact, coloring hair is a bit of a chemistry balancing act. To get an understanding of how the pigmentation of the hair is affected with the combination of ammonia and peroxide, I have to first explain the structure of hair. Hair is made up of a protein called Keratin.
Intro to Biology Bio 101-51 3/25/2014 Abstract: The pH levels of four different types of shampoos were tested to compare them to the pH range (4.5-5.5) of untreated hair. The pH levels of three shampoos commonly found in salons were tested, while the pH of one generic shampoo was tested. The effects of human hair and using shampoo that is highly alkali or acidic are discussed. Introduction: This experiment tested the pH levels of four different shampoos. The shampoos’ pH levels were compared to the range of pH levels found in untreated hair.
Retrieved from http://en.wikipedia.org/wiki/Braid History of hair braiding. (n.d.). Retrieved from
Research Question: What is the effect of chemical hair dye on the breaking force of hair? Variables Independent Variable: The application of chemical hair dye (dyed hair/non-dyed hair) By comparing and contrasting hair that is dyed with hair that is in its natural state, one can see the effect of dye on the breaking force of hair. Dependent Variable: The breaking force of hair in Newton (N) Controlled Variable: * Application of same force to break the hair * Differing forces can affect the breaking force of the hair, so every hair sample was snapped by pulls of approximately the same force. * Length of hair (10cm) * Differing lengths can affect the breaking force, whether it is requiring more force with longer hair or less force with shorter hair. In order to prevent this from happening, all hair samples were trimmed to 15 cm and attached to the hook with a loop of 10 cm to pull on.
On Ron Goldman's (one of the victims) shirt and inside the knit cap, hairs were also found. The hairs were matched to O. J. Simpson's hair. On the glove found at O. J. Simpson's estate, hairs were found matching the hair of both victims. Usually, hair analysis involves microscopic observation which determines whether the hair samples were human and compares the known hair with the samples observed (Deedrick, 2000). In O. J. Simpson's case, due to the racial factor, investigators also compared the racial characteristics displayed in the known and unknown hair samples.
Simple facebow (arbitrary or earpiece) 2. Hinge axis transfer bow (kinematic) The simple facebow can be utilized to transfer the relationship of the maxillary arch and an average intercondylar axis. The axis can be designated either arbitrarily (average measurement along the Frankfort Horizontal Plane) or by the position of the ear rod in the ear canal. The difference in the position of the ear bow position is accommodated for by the design of the articulator and its earbow receiver points. A more precise location of the horizontal axis can be made with a kinematic registration of this axis using a kinematic registration bow.
Step 1) Identify the legs and the hypotenuse of the right triangle. | The legs have length '14' and 48 are the legs. The hypotenuse is X. See Picture | The hypotenuse is red in the diagram below: Steps 2 and 3 | Step 2) Substitute values into the formula (remember 'c' is the hypotenuse) | A2 + B2 = C2 142 + 482 = x2 | Step 3) Solve for the unknown | | Problem 2) Use the Pythagorean theorem to calculate the value of X. Round your answer to the nearest tenth.
I measured my head by finding the biggest part of my skull and wrapping the measuring tape around it until it completed a full circle. I had to account for different amounts of hair, a different part of my head, how tight it is wrapped around my head, and two different measuring tape judgments. In total I added 0.6 cm of uncertainty. Sample calculations: Uncertainty of Average: Uncertainty of Average: Max-min2=54.3-54.02=.32=.15cm Convert to average to meters: avg=(T1+T2+T2)3= 54.0+54.1+54.3300=0.541 m Foot Length Data: Length of foot(Lfoot) / cm +- 0.3 Average Length of Foot (ALfoot) / m +- 0.0003 Uncertainty of Average Length (UAlength)/ m 26.5
c. sperm cell. d. skin cell. e. root tip cell. ____ 4. One portion of the cell theory states that a. all cells have a nucleus.
Record this value and calculate the diffraction slit distances. Calculate the number of lines per mm in the grating. Part 3: Human Hair Using a hair as a “slit” to produce an interference pattern, measure the