Physical and Chemical Properties Toby Orme-Lab 4 Solubility or Reaction Substance Name Color Odor Effect of Heat Cold H2O Hot H2O Litmus Test Dilute HCl Dilute NaOH Mg Silver N/A N/A Non soluble Bubbles Basic Hot/fizz N/A Cu Copper N/A Purple then turned black Non soluble N/A N/A N/A N/A Zn Silver N/A N/A Non Soluble N/A N/A Vaporized and fizzed N/A MgO White N/A Omits gas Hazy mix Boiled Rapidly Basic Got hot and fizzed Became thick or pasty CuCO3 Green N/A Turned black Hazy Green Became powdery
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Research Paper: Crime Scene Investigation (first draft) If a murder‚ a homicide and or a suicide occur‚ the crime scene investigator(s) collects the clues and evidence that will be analyzed by the forensic scientist(s) which can lead them to their suspect(s). The purpose of a Crime Scene Investigation is to help victims find justice. When a crime has been reported‚ the responding officer and/or detective have to note the dispatch information such as address/location‚ time‚ date‚ type
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Soil properties: Some physical and chemical properties of the soil were measured‚ which are presented in Table 1. The availability of nutrients and even contaminants depends on the degree of soil acidity. The most suitable pH for soil microorganism’ activity is 7‚ as nutrient solubility depends on soil pH changes (Riser-Roberts‚ 1998). The soil used in the present study has neutral pH and therefore does not limit the activity of microorganisms or the solubility of nutrients except for phosphorus
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Crime scene investigation requires the handling all types of potentially hazardous material‚ from blood and other physical evidence collected at the scene to the chemicals and other materials used by technicians as they perform their jobs. Failure to follow established safety and health procedures regarding the handling and disposal of hazardous material exposes crime scene technicians and others to a variety of risks. Technicians collecting evidence at crime scene must handle a range of biological
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In solving a crime‚ a crime scene is usually imperative to the investigation. Documenting a crime scene helps to establish some of the evidence or rather investigative leads which may help solve the case. Additionally‚ the leads found in the crime scene can help solve the case or determine what happened. Poor scene documentation can prompt unacceptable evidence in a courtroom‚ or missed evidence that may permit a victim to escape with a crime. Photography is important during the documentation of
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presents statistics on major factors that affects the property crime rates in the U.S. Abstract: The property crime rates of 45.7% occurs more in urban areas. About 16.8% of the crimes were committed by high school dropouts and only 0.4% of the crimes that occurs were related to the population density. The type of property crimes that happens includes larceny-theft‚ home burglary‚ home invasion‚ grand theft auto‚ forgery‚ and arson. These types of crimes may be caused by factors such as high school dropouts
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Crime Scene Investigation Abstract Documentation of the crime scene starts with the first responder and does not conclude until the scene is released and the evidence has been impounded. Physical evidence comes in all shapes and sizes‚ and there are multiple search patterns that are used to identify evidence. These patterns include line/strip search (used by one or two investigators who walk in straight lines across the crime scene) this method is best used in scenes where the boundaries are
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protein that our bodies make. Similarly‚ the DNA of each plant and animal seems to be ultimately responsible for the size‚ shape and function of every protein that each of them makes. We will now take a small overview on history‚ physical properties ‚ chemical properties of DNA. Overview on History : DNA was first isolated by Friedrich Miescher ‚ who in 1869 discovered a microscopic substance in the pus of discarded surgical bandages that he called ‘NUCLEIN’ Finally in 1953‚ working together at
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The crime scene examination and subsequent search should be done in a careful and methodical manner. After talking to the officer(s) who were the first ones on the scene and learning from them of any changes that might have been made to the scene since their arrival‚ such as turning lights on or off or opening doors or windows‚ start the examination by working your way into the body using great care to avoid disturbing or destroying any evidence as you do. Carefully observe the floor or ground surrounding
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01/03/2012 SOIL COMPOSITION SOIL COMPOSITION Generally soil can be divided to three components in natural occurrence This separation know as three phase systems or three phase diagram It consists of soil solids‚ water and air 1 01/03/2012 Soil components in natural occurrence Volume-Weight relationships As a result from 3 phase diagram several relationship were produce This relationship known as volume weight relationships. Refer to 3 phase diagram 2 01/03/2012
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