Interpretation:
Three possible sources of contamination of a crime scene by the first responders have to be listed.
Concept Introduction:
Forensics: The study of evidence discovered at a crime scene and used in court law.
DNA finger printing: This technique used to distinguish between individuals of the same species using only samples of their DNA.
Example: A murder victim is found. The forensics team retrieved a blood sample from the crime scene. They prepared DNA fingerprints of the blood sample, the victim and a suspect as fallows.
Want to see the full answer?
Check out a sample textbook solutionChapter 14 Solutions
Chemistry In Context
- You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.arrow_forwardWhich of the following is an example of good lab safety practices? Handling chemicals without wearing your PPE. Taking off your goggles if you're not using chemicals, even if the person next you is working with chemicals. Wearing shorts in lab. Placing a cap on all chemical containers when not in use. Wearing sandals or flip-flops to lab.arrow_forwarddefine pesticide treadmill.arrow_forward
- Which of the following statements about the BOD test is FALSE? A BOD test is a simple and practical indicator of the total organic content that is available to organisms plus any chemicals that spontaneously react with oxygen. B BOD test measures the oxygen consumed by microorganisms as they break down organic material There is an indirect correlation between the BOD5 value and the level of organic pollutants. The standard test for BOD is the five-day (BOD5) test carried out in the dark at 20 °Carrow_forwardArchie was pouring a solution from a test tube into a beaker when his friend Guy surprised him from nowhere. Archie dropped the beaker and glass pieces were caught in his sandaled foot.Identify mitigating measure/sWhat should be the appropriate response to minimize harmarrow_forwardWhich analytical separation method is best for recovering river bodies that are polluted by heavy metals and particulate matter. Explain your analytical process of choice.arrow_forward
- Scientists study the impact of changing only one component of a cancer treatment in a laboratory. Which of the following describes the study? controlled experiment observational study conceptual model computational studyarrow_forwardDifferent type of methods used in household contaminated wastewater purificationarrow_forwardHow is arson evidence collected and preserved?arrow_forward
- Distinguished by their physical and chemical properties. Soil fertilization Soil horizon Soil profile Soil formationarrow_forwardnitric acid chemical name chemical formula other common names molecular weight appearance state (solid, liquid, gas) transparency (opaque, transparent, translucent) colour reactivity data (corrosive, flammable, oxidizer, incompatible chemicals, other chemicals it reacts with) fire and explosion data toxicological data storage information preventative measures to be taken when using the chemical first aid procedures (the 2 most common) disposal method the 4 HMIS ratings (health, flammability, physical hazard and personal protective equipment) at the end, you may also add a short section in which you add a few personal comments about the chemical in questionarrow_forwardThe recommended air quality standard for Ozone (03) is as follows: a. Calculate this standard in ug / m3 at 1 atm pressure and 25 degrees celcius temperature. b. Calculate the ozone standard at an altitude of 830 mbar (1 bar = 0.987 atm) and a temperature of 15 degrees celcius. %3D 3. Assume that the exhaust gas from an automobile contains 1.0% carbon monoxide by volume. Calculate this concentration in mg / m3 at 25 degrees celcius and 1 atm. 4. Calculate the density of air in kg / m3 at STP (Standard Temperature and Pressure) conditions (0 deg celcius and 1 atm), assuming the composition of the atmosphere as 79% nitrogen (N2) and 21 percent oxygen (02) by volume.arrow_forward
- EBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT