Ependymin, a secretory glycoprotein that relates to long-term memory, had only been found in vertebrate species. The protein was proposed to be vertebrate-specific molecules that explain the evolution of the chordate nervous system (Landers et al., 2001; Venter et al., 2001; Ponting and Russell, 2002). Yet the gene that relates Ependymin were found in sea cucumber Holothuria glaberrima in the experiment, which was not found from invertebrates before. Using cDNA synthesis and analysis by common
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Introduction Tyrosinase is an enzyme that controls the production of melanin, which is a pigment found in plants, animals, bacteria and fungi. Both tyrosinase and melanin is found in nearly all cells. Melanin is especially important in determining the skin and hair color of mammalians. It is synthesized by an array of oxidative reactions of the amino acid tyrosine when tyrosinase is present (Kim, Y. & Uyama, H., 2005). Tyrosine is first hydroxylated into dihydroxyphenylalanine (DOPA), which is then
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Hello, I’m oxygen particle but you can call me Oxy, and today I’ll be taking you on an exclusive tour through the human body where we will meet many of my important friends, in relation to the Respiratory System. To start off with today, we will enter the human body as air through my friend, Nostril. Nostril has an important job to do; it’s up to Nostril to give the tour groups of oxygen particles a warm welcome, by filtering and removing larger unwanted particles and moistening them with his tiny
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The data I will collect, is the moles and grams for each unknown compound, calculate the g/mol for the unknown compounds, and calculate the molar mass for the known compounds. To identify the unknown compounds, we first weighed all seven of the unknown bags. To find the weight of the unknown compound in the bag, we first subtracted the weight of the bag by first weighing an empty bag and pressing the zero button to zero out the weight of each for the seven unknown compounds. The mol of each unknown
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Discussion: The method by which the mass of a single object was calculated in part 1, is similar in many ways to the method by which the elementary charge was calculated in part 2. Once the relevant data set was either collected or calculated it was first ordered from greatest to least. Next, the first differences between consecutively ordered masses/charges were determined. Thirdly, first differences that were significantly closer to zero than the rest were removed from the data set. Fourthly
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ACTIVITY: UNDERSTANDING ELECTRONIC CONFIGURATION, VALENCE AND VALENCE ELECTRONS. You are provided three necklace chains with 17 beads and one button. Consider the necklace chain as shells, beads as electrons and button as nucleus. You have to fill the electron shells around nucleus by putting these 17 beads into the three necklace chains around button following the Bohr-Burry and Octet Rule. Identify the element, its electronic configuration, valency and number of valence electrons. QUESTIONS AND
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Analysis of a Chemical Reaction Procedure Questions: What do you observe? We observed a white, chalky precipitate forming in the limewater test tube. What does this result indicate? This result indicates that carbon dioxide gas was formed by heating the test tube of NaHCO3. What did you observe in the test tube that you heated? We observed the condensation of water vapour on the mouth of the heated test tube. What does this indicate? This result indicates that water molecules were formed during
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Background: The Disappearing Spoon written by Sam Kean, informs readers about the importance of the periodic table and how it is important than what people really believe. In this book he talks about how the periodic table is not a table with numbers and letters. It is full of stories and interesting facts, which makes it standout. This book is more likely written for science and chemistry student and can not leave out the outstanding teachers for example Mrs. Nix. Summary: The reason Sam Kean
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Introduction “To what extent was the use of chemical weapons a successful strategy used by the USA (against the NVA and Vietcong) in the Vietnam War from 1956 – 1972?” The aims of this research task is to give reason for the American introduction of chemical weapons in the Vietnam War and also to state its effectiveness in combating the NVA and Vietcong forces and the long term effects of chemical weapons which lead the US forces out of Vietnam and force compensations to this day. The military strategy
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9.8. KARPLUS CURVE – VARIATION OF COUPLING CONSTANTS WITH DIHEDRAL ANGLE The Coupling constant, J varies with dihedral angle Figure 9.15. Staggered and eclipsed conformations Vicinal Coupling (3J) For Vicinal protons value of coupling constant varies with dihedral angle. Vicinal protons are the protons separated by three bonds. Dihedral angle between two axial hydrogen is 180° while the axial equatorial and equatorial equatorial dihedral angles are both 60°. The coupling constant reaches a maximum
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