Working Memory ● Working memory enables us to keep things in mind for short periods (215 seconds) as we think‚ e.g. while reading‚ making a list etc. ● It ’s related to but different to short-term-memory (STM) and long-term-memory (LTM). ● Chapter focuses on Baddley ’s (1986) model of phonological working memory‚ vocabulary acquisition and computational modelling of working-memory. ● The concept of ’span ’ means how many items from a briefly presented set can be remembered‚ e.g. ’word span
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Final exam Fair Game Sheet Stress Disorders * Reactions to extreme trauma: * Intrusive recollections and acute distress upon cues that suggest the trauma * Dissociative symptoms (psychic numbing) – STRONGEST SYMPTOM FOR PTSD * Emotional detachment‚ being in a daze‚ dropping out of activities‚ avoidance of trauma related topics‚ forgetting key aspect of trauma‚ derealization(external world is fake) and depersonalization. * Depersonalization disorder: one feels
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Chapter 1: Measuring the amount of substance Analytical chemistry: science of chemical measurement. Its object is the generation‚ treatment and evaluation of signals from which information is obtained on the composition and structure of matter Measurement: process of obtaining the magnitude of a quantity Example: The amount of saturated fat in the sample is 3 g/serving. Quantity: attribute of a phenomenon that may be distinguished qualitatively and determined quantitatively Value: magnitude
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mechanical forces within the cell to adjacent cells and the extracellular matrix‚ the distribution of organelles‚ the movement of molecules or components and the docking of proteins such as membrane receptors or ion channels. Ischemia will cause the dissociation of the cytoskeleton due to increase the intracellular concentrations of Ca+2 during ischemia which activate multiple phosphorylases and proteases that dissociate the cytoskeleton‚ thereby eliminating the functions that depend on its integrity
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Chapter 15/16 Worksheet Problem (1996 #2) 1) HOCl <--> OCl- + H+ Hypochlorous acid‚ HOCl‚ is a weak acid commonly used as a bleaching agent. The acid-dissociation constant‚ Ka for the reaction represented above is 3.2 x 10-8. (a) Calculate the [H+] of a 0.14-molar solution of HOCl. (2 points) (b) Write the correctly balanced net ionic equation for the reaction that occurs when NaOCl is dissolved in water and calculate the numerical value of the equilibrium constant for the reaction
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Strontium Manganese Oxide Introduction The ternary inter oxide SrMnO3 was first characterized by XRD by Negas and Roth []. This perovskite type inter oxide crystallizes in the hexagonal form with the space group P63/mmC(194). This inter oxide is of considerable interest to materials scientists owing to its ability to accommodate a high degree of anion vacancies‚ crystal structure and its high Neel Temperature (TN). It also exhibits polymorphism with two different cubic and hexagonal structures
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it does so‚ it increases weak acid concentration‚ so the reverse reaction rate starts to increase until you get a new equilibrium. Similarly‚ titration with a strong base decreases the H+ + salt => weak acid rate‚ and so (since the weak acid dissociation is still happening)‚ the weak acid => H+ + salt adds some H+
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solvents such as water at the level of individual atoms‚ ions or molecules (Silberberg‚ 2010). Dissolving an ionic salt in water destroys its lattice structure and the individual cations and anions dissociate through the body of the water. This ionic dissociation results in the surrounding water molecules getting attracted to the released ions (Lewis & Evans‚ 2011) and forming hydration shells. This process is referred to as dissolution (Lower‚ 2013). Sometimes‚ the dissolved ions may collide with each
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irreversible enzyme Inhibitors Irreversible enzymes are described as enzymes that require chemical activation. After chemical activation‚ the chemical reaction occurs between the target enzyme and the inhibitor. The chemical reaction results in the irreversible inhibition of the enzyme. In short‚ the enzyme catalyzes its own inactivation(Rando‚ 1974a). The purpose of irreversible inhibitors is to modifying key amino acid residues required for enzymatic activity. There are two types of irreversible
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Enthalpy changes can be calculated using average bond enthalpy data. i) The enthalpy change to convert methane into gaseous atoms is shown below. [pic] Calculate the average bond enthalpy of a C—H bond in methane. [1] ii) Use the data in the table below and your answer to (a)(i) to calculate the enthalpy change for [pic] [3] [pic] b) The standard enthalpy of formation of 1‚2-dibromoethane‚ CH2BrCH2Br‚ is – 37.8 kJmol-1. Suggest the main reason for
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