Physical Processing Techniques Lab Report

When the pH is not at its optimum, the differing pH's will disrupt the bonding between the R groups of the amino acid causing its structure and the shape of the activation site to change

Purpose: To learn about the international system of units (SI), to become familiar with common lab equipment and techniques, to gain proficiency in determining volume, mass, length, and temperature of a variety of items using common laboratory measurement devices, to learn to combine units to determine density and concentration, and to use laboratory equipment to create serial dilutions and determine the density and concentration of each dilution.

Purpose: To become familiar with the International System of Units and common laboratory equipment and techniques. To learn how to determine volume, mass, length, and temperature of a wide variety of items. To learn how to calculate density and concentration of dilutions.

The main objective of this experiment is to differentiate between a physical change and a chemical change.

Procedure: Using distilled water, premeasured containers and objects determine displacement of fluids and density of objects. Use ice and heat measure temperatures in Celsius, Fahrenheit and Kelvin.

Examine a piece of nichrome wire. On the data sheet, record the color and the luster of the metal. Use a forceps to hold the wire in the flame of your burner for about two minutes (recall where the hottest part of the flame is located). Describe the appearance of the wire while held in the hottest part of the flame. Allow the wire to cool and reexamine it. From your observations, determine if there was a physical or a chemical change. Give specific reasons for your conclusions. Save the nichrome wire for step #2.

A. Water boils at 100°C at sea level. If the water in this experiment did not boil at 100°C, what could be the reason?

In conclusion the relationship between the properties of skin and friction skin impressions is that without these characteristics or capabilities fingerprints wouldn’t exist. The

Scientists in the field of forensic science have a specific style of writing that upcoming forensic science students need to know about. While the style of writing in this discipline may not seem important, it is a primary foundation point for this field. A major task of being a forensic scientist is making sure that reports on evidence are properly written because the slightest mistake could change the entire outcome of a court case.When a forensic scientist is writing a report, they need to pay attention to their word choice, organization, and tone.They also need to make sure their writing is detailed and clear; therefore, they must pay close attention to, and study this style of writing in depth.

The Lab One was done on Laboratory Techniques and Measurements. The first experiment with my Lab partner; we got opportunity to experiment how to conduct measurements in length by using metric conversion. We started in cm units and changed into mm by x10, and moving decimal point x1 to right. To find in meter we moved from cm to meter two decimal points to the left or double check our self divided by 100 and all records in data table 1. The second experiment was to measure temperature of how cold and hot tap water can be by using thermometer in Celsius units. From this experiment, gained knowledge that tab water doesn’t boil to 100 Celsius related to containing different

The purpose of this lab was for the student to get involved with his or hers new lab kit as well as being able to know, identify and use each other tools provided in the kit. Another key learning aspect of this lab is to teach the student how to measure properly the many units in the SI system. I will be using laboratory dilutions, measurements, and weights to then calculate using algebraic formula.

Latent fingerprints are mostly impressions left at a scene that are not noticeable to the naked eye; they are also one of three classifications of fingerprints that can be found at the scene of a crime or anywhere else. Latent prints

The experiment went very well and most of our hypothesis were accurate. There were few setbacks in this experiment. The experiment did not account for the other substances that would be picked up along with the iron shavings. In order to cleanse the substance for the most accurate results the experimenters had to repeat this processes two more times. Another problem the scientist encountered was with their paper filter. The filter would not allow any substance to pass through it including the water. So to filter the sand from our mixture we had to use a coffee filter instead which was very efficient in completing the required task, and as an added bonus it stopped the smaller pieces of wood that were to difficult to collect on the surface of the water with a scoopula.

Friction ridge evidence has always been considered infallible in crime investigation and conviction of those involved. Traditionally, latent print examiners have presented identification testimony in courts with an explanation of identification or with a charted enlargement of matching and latent print. [1]

Latent print work in cases involving such cases, for example, murder cases is one of the processes that is used by the investigators of a crime in the course of trying to unravel the culprits that were involved in the murder. In cases where the identity of the victim is not clear or is not determined immediately, latent impressions could also be used to bring to light the identity of the victim. Latent impression about forensic science could be defined as any accidental or chance impressions that might have been left as a result of friction ridge skin on something like a surface. The impressions that have been left could be visible or sometimes invisible during the time that they are deposited on the surfaces although the word latent is used to refer to invincible. The skin contains some deposits of oil as well as perspiration that is responsible for coating the surface.