BIOL 140 Lab—The Chemical Composition of Cells Name ____________________________ I) Introduction All cells contain four major types of macromolecules: carbohydrates‚ lipids‚ nucleic acids‚ and proteins. In today’s lab‚ we will be studying three of the four-proteins‚ carbohydrates and lipids. Various chemical tests can be used to detect the presence of each of these molecules. Most of the tests involve a color change visible to the eye. If a color change is observed‚ the test is considered positive
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Abstract: The objective of Experiment 1 was to observe some chemical changes. While observing the chemical changes in elements I also experimented with household cleaners to see how much chemical properties relate to our daily lives. Chemical changes occur all around me and I go without noticing them all the time without a second thought. This experiment opens my eyes to different chemical reactions occurring around me. This experiment also shows the importance of dilution. If I did not dilute something
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Test Item File Electronic Devices and Circuit Theory‚ 9e (Boylestad) Chapter 1: Semiconductor Diodes 1) An intrinsic semiconductor is one that is as pure as present-day technology can make it. 2) Electrons are the minority carriers in an n-type material. 3) Holes are the majority carriers in a p-type material. 4) The quantum-Volt (qV) is the unit of measurement for electron energy. 5) A free electron has a higher energy state than any that are bound to their nucleus.
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Diamonds are Forever (from Sierra Leone)‚ Kanye West The famous song “Diamonds are Forever (from Sierra Leone)” is not only a good song that is sung by a legendary music artist‚ Kanye West‚ but it is a hidden message political song that is directly talking about the precious blood diamonds from the southern countries of the continent Africa. When someone hears the two words “blood diamond‚” most would probably assume that the diamonds are from Africa and that there are many people who die trying
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Name: Jeanne Yoo|Date: 07/15/13| Exp 1: Observations of Chemical Changes|Lab Section: 1411-76426| Data Tables: Part 1: |Chemicals|Well No.|Observations of the Reaction| A.|NaHCO3 + HCl|1 |clear bubbles formed| B.|HCl + BTB|2 |turned orange after BTB was added‚ transparent‚ acidic| C.|NH3 + BTB|3 |turned dark blue after BTB was added‚ opaque‚ basic| D.|HCl + blue dye| |blue dye was missing from kit| E.|Blue dye + NaOCl| |blue dye was missing from kit| | with the 1 drop of HCl| ||
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Diamonds has played an important role in jewelry industry for years‚ its sparkle and glow made it girl’s best friend. However‚ due to the high prices of all diamonds‚ illegal traders around the world buy illegal diamonds to fund terrorism‚ violence mainly in Africa‚ and to buy weapons to threaten the government and people in African regions. Blood diamonds or converted diamonds is a term used for a diamond mined in a war zone and sold to finance war on the mined country‚ and to buy weapons. This
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Diamonds: The Unexplored World Who discovered the Diamonds? Ever wondered about this wonder stone? Well as per oldest records‚ Alexander the Great is said to have discovered the diamonds for the first time in India and shipped these to Europe. These were also spotted by Alluvial gold miners in Brazil in 1725 and in 1859 in South Africa and in 1869 mining of the hard rock sources of diamonds started at Kimberley. Diamonds in Australia were recorded in the Bathurst area‚ New South Wales in 1851. We
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Human Geography Diamonds of War 1. According to the film‚ what percentage of all diamonds are considered illicit? a. The film says that 20% of all diamonds are considered illicit. They are diamonds that are smuggled out of countries. They are diamonds that have paid for wars‚ terrorists‚ weapons‚ or armies. They can also be diamonds that were used to launder money or hide illegal activity. 2. How many UN troops are currently stationed in Sierra Leone? Why is the number significant? a. There
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made to mine for diamonds‚ blood diamonds. These gems are used to fund wars throughout the country. While working in the mines‚ Solomon chanced upon a huge pink diamond. He was caught by the commander of the rebels while he was trying to hide the gem. The government forces then arrived‚ making the commander unable to do anything about the diamond. Solomon was able to bury it and then was put to jail with all the other miners. The commander announced the existence of the diamond in the jail which
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Experiment 1: Observations of Chemical Changes Abstract: In the lab 1 experiment‚ the objective was to observed properties of various chemical reactions between twelve different basic compounds. Each reaction revealed chemical properties consisting of color change‚ CO2 gas formation‚ and/or precipitate formation. Certain reactions made it possible to distinguish between an acid and a base. Through the results of this experiment‚ chemical properties observed in the reactions could be used to associate
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