Executive Summary Concrete is the most heavily used construction material in the modern world‚ and given the current global trends towards sustainability there is a need for significant advances‚ particularly in the construction sector. Geopolymer concrete (GPC) is a recent development in construction materials demonstrating similar structural properties to that of Ordinary Portland Cement (OPC) based concrete‚ yet whilst at the same time addressing the environmental footprint of the industry and
Premium Concrete
a) What happened to sales of batteries in the period 2004-8? Provide a quantitative estimate. How do you explain the fact that over that period the amount of batteries sold increased whereas the value of sales declined? From figure 20 we can see that the volume of sold batteries from 2004 (584 million batteries) to 2008 (611 million batteries) has increased by 27 million batteries. During that period of time the volume has slightly raised‚ where in 2006 was the highest volume of batteries sold
Premium Price elasticity of demand Supply and demand Elasticity
ACIDS 1. Acids are chemicals which will turn litmus paper red. Litmus is a colored Chemical which can change from red to blue and back again. Which colour it is Depends upon the concentration of Hydrogen ions. If the concentration of Hydrogen ion is higher than it is in pure water then the litmus will turn red. If it is lower than in pure water the litmus will turn blue. 2. An acid is a substance that turns blue litmus paper red acids can‚ be identified due to specific
Premium PH Acid Base
1. Iron undergoes an interesting journey as it travels through the human digestive tract. Discuss the processes that occur in the stomach (pH 2) and the intestines (pH 8) and the pH dependence of each process. Foods that we consume contain Iron in the ferric (Fe3+ ) form. Ferric form is not usually absorbed in the body. In the stomach‚ there is low pH of 2 due to presence of gastric acids such as Hydrochloric and Ascorbic acids. These acids provide an acidic environment for reduction of ferric iron
Premium
The Andromeda Strain- 1. A. QUOTE: "Crane: ’You see him? The man in the white robe‚ walking across the street-’" "Shawn: ’I see him.’" "Crane: ’He’s just stepping over them like-’" "Shawn: ’He’s coming towards us." "Crane: ’Sir‚ look‚ I think we should get out of here‚ if you don’t mind my-’ " "The next sound heard was a high-pitched scream‚ and a crunching noise." -pg.10 B. PLOT RELEVANCE: From this quote we can conclude that someone survived the accident. This led the scientists to have hope
Premium PH Blood Carbon dioxide
capable of growing on no more than hydrogen and carbon dioxide are remarkably similar in the details of their carbon and energy metabolism to the far-from-equilibrium chemistry occurring in a particular type of deep-sea hydrothermal vent‚ known as alkaline hydrothermal vents. Based on measured values‚ they calculate that natural proton gradients‚ acting across thin semi-conducting
Premium Bacteria Carbon dioxide Oxygen
Q. 1. What do you observe when ammonia gas is bubbled through red litmus solution? Q. 2. Write an equation for solutions of ammonium chloride and sodium hydroxide are heated. Q. 3.(i) What is the purpose of Haber’s Process ? (ii) Name the gaseous inputs of the Haber’s Process and state the ratio by volume in which the gases are mixed. (iii) What is done to increase the rate of reaction in the Haber Process ? (iv) Give two different ways by which the product can be separated from the reactants
Premium Ammonia Nitrogen Sulfuric acid
Science Fair Packet Name_______________________________ Date ________________________Per_____ DULUTH HIGH SCHOOL SCIENCE FAIR I. Science Fair Rationale: Science Fair allows the science student a chance to do “real science”. Coursework provides science facts and formulas‚ but conducting a scientific investigation gives a student the practice in time management and the use of variables‚ research‚ observation and analytical skills that a student needs if interested in a career
Premium Research Scientific method Battery
Lecture 12-Mechanisms of drugs Question 1 TCAs-Tricyclic antidepressants Blocks reuptake of norepinephrine and serotonin ie they linger for longer in the synapse and interact with receptors longer SSRIs-Selective serotonin reuptake inhibitors Block only serotonin (not NE) reuptake MAOIs-Monoamine oxidase enzyme inhibitors (MAOIs) * Block action of MAO enzymes – presynaptic terminal has increased levels of monoamine transmitters for release * Decrease in MAO activityIncrease
Premium Serotonin Neuron Brain
Chapter 09 Cell Communication Multiple Choice Questions 1. The protein Sonic Hedgehog (SHH) plays a role in specifying the identity of digits (such as fingers and toes) in mammals. Several digits arise directly from cells that both express and respond to secreted SHH. What type of signaling would this be considered? A. Direct contact B. Paracrine C. Endocrine D. Synaptic E. Autocrine If a cell responds to the ligand that it secretes‚ this is considered autocrine signaling.
Premium Signal transduction