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  • Edta Titration With Our Water Sample
    2,336 words
    Water is the most important molecule that exists on the Earth. Without water living beings would not be able to live. Water is used for an immeasurable number of things. There are many properties of water, which makes this molecule so unique. One which people overlook is hardness. Hardness is defined in the Chemistry: The Central Science by Prentice Hall's as being "water that contains a relatively high concentration of Ca 2+, Mg 2+, and other divalent cations". Water containing these ions is no...
  • Characteristics Of Coliform Bacteria
    3,045 words
    Coliform bacteria are good indicator organisms for the presence of pathogenic bacteria due to their real tionship with these pathogenic bacteria, their relative ease of determination by simple methods, and by their occurrence in large quantities in human feces. The MPN method used in this experiment is one of the prescribed techniques for the determination of these coliform bacteria from the Standard Methods for the Examination of Water and Wastewater as prescribed by the EPA. It consists of thr...
  • Statistic T With The Critical Value T
    1,229 words
    Homework Assignment # 4 Problem MBS-2. Rush Hour Traffic in ActivStats (Tests for a Mean Homework) In order to reduce the average number of vehicles that use the Lincoln Tunnel, the Port Authority in New York is experimenting a peak-hour pricing, . The mean number of cars waiting in a queue is 1220 (population mean: m = 1220). A random sample of 10 days (n = 10) is drawn and the data representing the number of cars is analyzed. The Data Desk tool in ActivStats reports that the sample mean is 989...
  • E Coli Level In Ground Beef
    703 words
    This article that I read is about how the E. Coli level in ground beef could be higher in the warm months. There are a lot of statistics in it about how much E. Coli is in a certain number of samples of meat and what we can do to kill the virus. It doesn't really talk about the rise of E. Coli in the warmer months as much as it talks about how the percent has increased since 1995. The government test of raw ground beef suggests that levels of E. Coli 0157: H 7, which is a potentially dangerous t...
  • Amount Of Water In The Test Tubes
    1,288 words
    Introduction During lab on Monday, April 9, 2002 our class conducted a lab on water chemistry and pollution. The two bodies of water that were choose as samples where, the Wall pond and the HGTC pond. Each group had to test the water for Temperature, Dissolved Oxygen, Nitrate, Phosphate, pH, and Turbidity. Only two people where chosen to test the waters for Coliform bacteria. "Coliform bacteria are not pathogenic (disease causing) organisms, and are only mildly infectious. For this reason these ...
  • N Sample Size The Variances
    992 words
    The unit of observations were random samples of twenty-five various employees divided into two distinct, independent populations, smokers and non-smokers. Then data on their absences from work for the previous year were obtained and used in this statistical inference. Because of a strong association between smoking and ill-health, it is generally accepted that smokers miss more work than their non-smoking counterparts. Does the smoker miss more work than the non-smoker? Data from these random sa...
  • Purpose Of Bile Salts
    431 words
    Data SheetCarbohydratesSample Benedict Test + or - 1. Glucose + 2. Maltose + 3. Sucrose - 4. Lactose + 5. Starch - Resultant Color in a + Benedict Test - Orange / Red/Green Sample IKI + or - 1. Starch + (Blue) 2. Maltose - (Yellow) 3. Sucrose - (Yellow) 4. Glucose - (Yellow) 5. Water - (Yellow) Lipids A. Solubility 1. Water - 2. Acetone ++ 3. Alcohol + 4. Chloroform 5. Ether Polar Molecule: Molecules are balanced by the number of positive and negative charges, if there are more positives than ne...
  • Initial Test Each Batch Of Specimens
    9,465 words
    NOTE: This draft document represents a joint effort by the SAMHSA / CSAP Division of Workplace Programs and members of the SAMHSA Drug Testing Advisory Board (DTAB). It has not been reviewed by all members of the DTAB, by industry working groups, or by other Federal agencies. This draft document is the first release to a wider audience. It will serve as the basis for developing the guidelines for Federal Workplace Drug Testing Programs. All interested parties are invited to comment on the draft ...
  • Flask And A Solid Sample
    2,404 words
    Instruction Manual The purification process: Recrystallization & Filtration Jason Williams 09-13-00 NATS 4310 Table of Contents Preface Chapter 1 Equipment involved and preparation Glassware and accessories Proper sterilization of equipment Safety precautions Chapter 2 Setup procedure before purification Equipment setup Choosing of solvent Chapter 3 Gathering of an unknown compound and the first step: filtration Collection Filtration Repeat Filtration and Cleaning Collection and measuring of cru...
  • X 10 Dilution Of Sample 8
    1,207 words
    Experiment showing the determination of Creatinine concentration in 24-hour urine samples. Aim: The aim of the practical is to test the following hypothesis: The amount of creatinine found in a persons 24-hour urine sample bears a direct relationship to the body mass of that person. METHOD: Materials: 1) 5 urine samples of unknown concentration numbered 1, 5, 6, 7 ad 8.2) Picric Acid 3) 0.75 M Sodium Hydroxide 4) P 1000 Gilson Pipette 5) 1 cm 3, 5 cm 3 and 10 cm 3 glass pipettes 6) Vortex Mixer ...
  • Blood Alcohol Level In Excess Of 80
    1,620 words
    Every year almost 20,000 people are killed in accidents involving people (or persons) under the influence of alcohol or drugs. That means that someone is killed from alcohol-related accidents approximately every 7 hours and 29 minutes. These types of accidents end up costing the nation almost $50 billion dollars each year. Which is a rise of 4% since 1994. Every year, the police give a breath test to 1.2 - 1.4 million car drivers and about 7,000- 10,000 boat drivers to eliminate drunken drivers ...
  • 1 Ml Of 2 5 Naoh Solution
    803 words
    Amino Acids Introduction This lab was done in order to detect the presence of amino acids. Amino acids are distinguished from other biomolecules because not only do they contain carbon, hydrogen and oxygen, but nitrogen as well. The Amine group (NH 2) is where the nitrogen is located. Amino acids contain two other groups, one is called the Carboxyl group (COOH) and the other is called the variable "R" group. The "R" group is what makes amino acids different from one another. All of these groups ...
  • Dna Test
    255 words
    Precis: DNA TESTING: FOOLPROOF? In 1998, Josiah Sutton, 16, was convicted of kidnapping and rape and was sentenced to twenty-five years in jail. His arrest has been based on a false identification and misinterpreted semen testing. The police were looking for a man who was 5'7" tall and weigh 135 pounds; however, Josiah was 6 feet tall and weighed 200 pounds, but they arrested him because they thought that the DNA test proved that he was guilty. When the results came back as a positive match for ...

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