REVISION NOTES FOR PRELIM BIOLOGY: [ A LOCAL ECOSYSTEM ] ~ Ecosystems: “any area that contains living organisms interacting with each other and their environment. In a balanced ecosystem‚ there is a flow of energy through it and recycling of some materials” Inputs and Outputs of Ecosystems include: - the energy flow through the ecosystem; energy from the sun flows one way through‚ with heat loss at each trophic level - the input and recycling of inorganic and organic material (matter) - the
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Basic Terms • forensic (adj) 1. pertaining to‚ connected with‚ or used in court of law or public discussion and debate 2. adapted or suited to argumentation; rhetorical Forensic Chemistry • Forensic science (n.) – the application of science to criminal and civil laws. – Emphasizes the application of science to criminal and civil laws that are enforced by police agencies in a criminal justice system. • Adversarial system – owes its origins to individuals such as Bertillon‚ Galton‚ Lattes
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Microscopy. Microscopy methods of studying bacterial infections include using light and electron microscopes. Light microscopy methods utilized include; conventional phase-contrast‚ fluorescence‚ and confocal microscopy. Electron microscopes create higher quality images; for example‚ they have been used for studying the structure of T3SS in salmonella. However‚ light microscopes are used more regularly than electron microscopes because they are more widely available. They are used to study the relations‚ and
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similar/different between the three domains? 11. What staining/fluorescence tools do we use to count organisms? To sort organism? 12. Given a list of compounds‚ be able to identify the electron donors and acceptors. “Electron Donors” (Food) Reduced Carbon‚ H2S‚ H2‚ Fe(II)‚ light-plus-pigment‚ NH4 “Terminal Electron Acceptor” (To breathe) O2‚ SO4^2-‚ Fe(III)‚ organics‚ CO2‚ NO3^-‚ S^0 13. Be sure to solve various Poisson problems: P(x)=probability‚ m=mean‚ x=number of times
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1. This question is about lasers. (a) With reference to the light waves emitted by a laser‚ state what is meant by the terms (i) monochromatic. ........................................................................................................................... ........................................................................................................................... (1) (ii) coherent. ...............................................................................
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Chapter 2: Patterns in Nature 1. Cell theory • 1590: Dutch grind glass lens (1st compound microscope) • 1665: Robert Hooke uses compound m. analysis thin cork slices as filled with air enclosed in boxes (cells) distinct • 1676: Dutch sees microorganism under microscope from pond water • 1824: French suggest all organisms composed of cells • 1827: Robert Brown (Brownian motion) discovered nucleus in plant cell • 1838: German produced evidence that all organisms made of cells • 1859:
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Forensic Chemistry and Forensic Chemist Forensic chemistry is becoming an increasingly popular topic. It is being used quite often in the real world with police investigations‚ cases‚ and is also being magnified in television shows including Forensic Files‚ CSI‚ and Bones (What is Forensic Chemistry?). Forensic chemistry is important because without it we wouldn’t know the outcome of a crime. The forensic chemist’s job is to examine evidence given to them from a crime scene‚ when it happened‚ and
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Did A. afarensis make and use stone tools at the site of Dikika some 3.39 million years ago? The first evidence of stone tool use and manufacture was found in Gona (Ethiopia) which dates back to between 2.6 and 2.5 million years ago as well as several cut-marked bones found near the Bouri site which indicates stone tool use 2.5 million years ago (McPherron et al. 2010). A. Afarensis is a hominin species found between 3.6 and 2.9 million years ago at sites in Ethiopia‚ Kenya‚ and Tanzania. Since being
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Study guide for Microbiology Chapter 2 Name________________ 1. List and describe the sequence steps routinely used to identify bacteria. These are referred to as the “five I’s” in your text. 2. Define / describe each of the following as they apply to microbiology: a. Culture f. pure culture b. Inoculum g. contaminated culture c. Inoculation h. mixed culture d. Colony 3. Microbiologists employee a number of approached to acquiring a pure culture
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up and record the images that come from PET scans. A radioactive compound is inhaled or injected into the patient‚ and it accumulates in tissues. As the atoms in the compound decay‚ they release positrons‚ which‚ when they collide with electrons‚ both the electrons and positrons are annihilated‚ and two photons (light particles) are emitted. (See the image on the right). The photons are picked up by a detector ring on the PET scanner‚ and the computer uses the information to generate three-dimensional
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