...Zinc is one of the most known and used metals in the world. The element Zinc (Zn) is a transition metal that belongs to group 12. It has an atomic number of 30. Zinc in its pure elemental form is a bluish-white shiny metal. Zinc can be found all around us, not only in rocks and in the soil but it can also be found in the air, water, and living organisms. Metallic zinc was first produced and recognised in India during the 1400s. German chemist, Andreas Marggraf, rediscovered zinc and recognised it as a new metal during the 1700s. Zinc is usually produced today using a process called galvanisation. Zinc is used as a protective layer for those metals that undergo corrosion such as iron. This is also used in construction and batteries. It is essential to keep ones body healthy. This is found all over the human body, bones and other body parts contain this element. It is important to get the right amount of dosage in the body. Zinc is present in all kinds of food. This is one way of getting zinc into our system. Too little of this can cause sicknesses like lose of appetite, poor immune system, slow growth and wound healing, and skin sores. Too much of this can be harmful to our health. Such are stomach cramps, vomiting, anemia, and some nervous system disorders. We are also exposed by inhalation especially those who are working in the metal processing industry....
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...Visit us at www.pro-base.eu - 1 - HOMEMADE BATTERIES Making and evaluating homemade batteries Author Ken Gadd, 4science, Stratford sub Castle, SP1 3YP, UK; ken@4science.org.uk Languages available English, Slovenian Summary Batteries power most of the portable electrical and electronic devices we use. Different types are available, suited for different uses. Batteries convert chemical energy into electrical energy. You can make a battery from a lemon, a piece of zinc and a piece of copper. So why don’t we use this instead of buying batteries from shops? In this activity you find out. You also explore other homemade batteries, including a seawater battery made by scientists in the BBC TV programme Rough Science. The purpose is to explore the potential of low technology homemade batteries as emergency power supplies. Activity type H Use of scientific knowledge and understanding to solve problems Working in teams to solve problems Communication Resource/budget management Time and workload management Techniques Field Electrochemistry Visit us at www.pro-base.eu - 2 - Time Practical lessons: 600 minutes Theory lessons: 120 minutes Out of class time: 360 minutes StandardBase procedures None StandardBase techniques None Other resources Zavod za šolstvo, Ljubljana (The National Education Institute of the Republic of Slovenia), http://www.zrss.si/ Other resources are listed in the activity...
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...The explanation of Arabidopsis thaliana by The World Of Genetics introduces you to the actual plant of Arabidopsis thaliana. Arabidopsis thaliana is a very important plant because it has made many impacts on the science world and many research papers have been done on experiments with this plant. This plant is known as a plant that experimenters did basic research on and conducted experiments and also it helped with other areas of research in the science world. The reason behind everyone using this basic plant to use the information for other areas in biology because this plant is very easy to grow. Arabidopsis thaliana is small in size so its very easy to grow and not to hard to grow anywhere. This plant can be grown well in simple places. Also this plant can be very easily experimented on multiple times due to its 6-8 week germination. After germination, the plants must make there own food in a special process called Photosynthesis. “Arabidopsis thaliana” Plants must make their own food after germination. This process of which they make there own food is call photosynthesis. The essential things needed for photosynthesis are sunlight/ light source, water, air and chlorophyll. This process is a base of all growth of plants. During this process of photosynthesis they take the sunlight or light source given and turn it into food for them selves to grow. This process takes place in the part of the plant called the chloroplast, that’s where chlorophyll is found. This whole process...
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...Year Eleven Chemistry Rust prevention in coating. Introduction/Abstract. The context of ships rusting at sea. Steel has many properties that make it a useful and essential building material in boats. Its strength and durability make it a great choice for structures exposed to high amounts of stress, such as weather, heat, large amounts of applied force and constant usage and is also a viable option for the sea although it can still be bettered. Steel is better protected by; galvanisation, waterproof paint or a sacrificial anode to better the corrosion protection for boats in the water compared to just bare steel framework (Corrosion methods, Corrosion-doctors.com;) these methods in theory protect the steel from the chlorides and salts to further the durability and life of the framework of a boat and hence allow them to endure more, and with corrosion costing $2.7 billion to just ships alone it’s easy to see why corrosion must be prevented. (The cost to the world because of corrosion with ships at $2.7 billion.) The chemistry of rust. Rust is caused by a few factors; moisture is the leading cause of rust along with water and salt, all making boats the most common victims of rust. (4 Fe+ 3O2 + 6 H2O= 4 Fe(OH)3,) Both water and oxygen must be present for rust to start and with water and oxygen on its own enough for rust to start destroying the structure of a boat, but along with salt to the water, it’ll become evident quickly that rust can be a big problem for many boat...
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...Zinc Chemistry Term Paper Dr. Joyce Sherpa Mt. Hood Community College By Julianne Sorensen Zinc comes from the German word Zinc or spelter. Zinc is a metallic chemical element. The symbol for Zinc is Zn and its atomic number is 30. There are a variety of zinc compounds that are commonly used, zinc carbonate, zinc gluconate (used as a dietary supplement), zinc chloride (used in deodorants), zinc pyrithione (anti-dandruff shampoos), zinc sulfide (in luminescent paints), and zinc methyl or zinc diethyl in the organic laboratory. (Wikipedia) Zinc is of great importance to public health as an essential mineral. Zinc deficiency’s affect about two billion people worldwide and is associated with many diseases. Zinc deficiencies were first recognized in 1961, when diets with low zinc bioavailability due to high phytic acid content were associated with adolescent nutritional dwarfism. Children are affected the most by Zinc deficiencies and it is estimated Zinc deficiencies contribute to about 800,000 deaths per year. It causes growth retardation, delayed sexual maturation, infection susceptibility, and diarrhea. (Wikipedia) The role Zinc plays in growth and development, the immune response, neurological function, and reproduction are very important. Zinc’s function on a cellular level is divided into three sections; catalytic, structural and regulatory. Catalytic Enzymes depend on zinc for their ability to catalyze vital chemical reactions. Zinc plays an important role in...
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...www.elsevier.com/locate/resconrec Substance flow analysis of zinc in China Guo Xueyi ∗ , Zhong Juya, Song Yu, Tian Qinghua School of Metallurgical Science & Engineering, Central South University, South Street of Yuelu, 932, Changsha, Hunan 410083, China article info Article history: Received 16 January 2009 Received in revised form 23 July 2009 Accepted 26 July 2009 Available online 28 August 2009 Keywords: Zinc Substance flow analysis “STAF” model Life cycle Resource recycling abstract A material stock and flow (STAF) model was constructed to track the pathway of zinc in China, 2006, for the study of the industrial metabolism of a certain metal within a regional level. The primary flows of zinc include production, fabrication and manufacturing, use, and waste management. This paper traces the major flows of zinc from ore, to product, to potential secondary resource as it moves through the China’s economy over 1 year, and inventory data, and mass balance equations were used to determine the quantity of flows. The domestic ore produced was 3248.3 Gg and output of refined lead ingot was 3162.7 Gg in 2006. It was calculated that, in the production and manufacture and fabrication stage, the self-supply efficiency of zinc raw materials in 2006 is 87.58% and 94.92%, respectively. The results reveal that China has richer zinc raw resources. But only about 3.68% and 9.06% of the discarded zinc in the two stages were recycled, respectively. While zinc’s residence...
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...Submitted in partial fulfillment of the requirements in Research 1 Alubijid National Comprehensive High School Special Science Class Alubijid, Misamis Oriental January 8, 2014 Mrs. Ma. Romila D. Uy Research Adviser Abstract Battery is a device used to store electrical energy. Battery can also be called a cell in which the reaction between two different substances can be made to occur in such a way that some of the chemical energy is converted into a useful electricity. Since its invention and inception, battery has become the most common power source for many household and industries. The vinegar battery is constructed out from simple components or materials. Adding an amount of vinegar to a strip of different metals like copper, from copper wires and zinc, from nails can form a simple battery. This battery has a low amperage output which can supply power on a low amperage/low voltage device like a calculator. It is easy to construct. The following steps should be followed in constructing the vinegar battery: 1. Prepare all the materials needed like: * Vinegar * Strip of Zinc from nails * Strip of copper from copper wire * Vinegar container (non-metallic) * Multi-tester 2. Place the vinegar inside the container. Make sure that it is deep enough to suspend the two different metals on it. 3. Cut a piece of copper wire and suspend it into the vinegar container. 4. Suspend a piece of galvanized nail (Zinc) into the vinegar container. It should be apart...
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...Vinegar Electrolytes S. Ramakanth Electrical And Electronics Engineering,Visakha Institute of Engineering and Technology, Visakhapatnam Abstract: This paper gives how salt water and salt vinegar is used as a renewable energy source. Working of salt water and salt vinegarelectrolytes and both the combination of electrolytes, comparison of different electrodes used in the electrolytes. And choosing which is the best pair of electrodes.applications of it in many fields. Keywords: Electro-chemicalreaction,Electrolyte,Vinegar,corrosion. INTERNATIONAL JOURNAL OF INNOVATIVE RESEARCH & DEVELOPMENT Page 310 www.ijird.com October, 2012 Vol 1 Issue 8 1. Introduction We know that our earth covered with 70% of water and 30% of land. So water occupies more space than land but 97% is the salt water and 3% is the fresh drinking water. Many technologies are developed to use salt water for producing electrical energy. The energy produced in this way is renewable energy source. Ex: salt water battery, salt water generators etc. The modern battery is found in high-tech applications ranging from hearing aids and pace-makers to pocket calculators, personal stereos, radios and mobile phones. They are everywhere and completely invaluable. The origin of the power behind the battery is chemical. In the following paper I explain the how the electrolysis occur and what are the different reaction of different electrodes for the better efficiency. 1.1How These Work –...
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...Investigative Question Write your experiment question here. A good experiment question format is: What is the effect of liquid on greenish-blue pennies? The effect of orange juice cleaned the pennies and took the dirt off and the effect of vinegar on the pennies seems to rust and form a black hard substance on the pennies in trial three after 24 hours. How does the liquid affect the pennies? I will say that the effect of these both liquids had the acidic effect as describe in the research. Which liquid cleans the pennies better the orange juice or the vinegar? Based on the experiment I will say on all three trials the orange juice cleaned the pennies better than the vinegar on a 24 hour period.I expected the vinegar to clean the pennies instead it made it rusty in the last trial when it was for 24 hours. Experiment Hypothesis Orange juice on one set of pennies and vinegar on another set of pennies in separate containers will make you ask which liquid will clean the pennies is it the orange juice or vinegar? Answer to testable question: I mention before we did three trials of this experiment and I noticed that the orange juice gave the pennies a cleaning effect on all three trials. The vinegar seems to give the pennies a hard on trial #3 after 24 hours. Experiment Details Independent Variables On Trial#1 we started off with glass cups and the results were the Simply Orange juice and the Heinz vinegar actually cleaned the pennies. Trial #2 The Simply Orange...
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... We believe that we should connect them with a (+) and a (-) wire so that the flow will be even with no reverse polarity. The load we thought of using was a battery- operated clock, one of the most common materials found in almost everyone’s household. We believe that it would work because the organic materials we will use have electrolytes that flow freely on its own. Thus, it will flow into conductors to make a decent circuit. Our thoughts on which will be the best conductor were different. Some said that the lemon is the best conductor due to its acidity. Some say it’s the banana due to its efficiency. Yet some also say it’s the orange due to its fame as a fruit. D. Significance of the Study Our main reason for making this research is not only to make a variation on the commercial DC...
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...that we should connect them with a (+) and a (-) wire so that the flow will be even with no reverse polarity. The load we thought of using was a battery- operated clock, one of the most common materials found in almost everyone’s household. We believe that it would work because the organic materials we will use have electrolytes that flow freely on its own. Thus, it will flow into conductors to make a decent circuit. Our thoughts on which will be the best conductor were different. Some said that the lemon is the best conductor due to its acidity. Some say it’s the banana due to its efficiency. Yet some also say it’s the orange due to its fame as a fruit. D. Significance of the Study Our main reason for making this research is...
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...Introduction Knowledge and learning become perfect when it is associated with theory and practice. Theoretical knowledge gets perfection with practical implication. As the concerning parties; educational institution and the organizationsubstantially benefit from such a program namely “Internship”, the sole purpose of internship is to train the students and prepare themselves for the real life in job markets. I have developed this internship report as a partial requirement to acquire the BBA degree under direct supervision of Mohammad Mahfuz Ahmed. I have tried my level best to make this report informative and enriched so that the real things can easily be displayed History of Berger Berger is one of the oldest names in paint industry detailing back more than 200 years to 1760. Lewis Berger, a German national, founded dye & pigment making business in England. Lewis Berger & Sons Limited grew rapidly with a strong reputation for innovation and entrepreneurship culminating in perfecting the process of making Prussian Blue, a deep blue dye, a color widely used for many European armies’ uniform. Production of dyes & pigments evolved into production of paints & coatings, which till today, remains the core business of Berger. Berger grew rapidly by establishing branches the world over and through merging with other leading paint & coating companies. Berger in Bangladesh Berger Paints began its painting in Bangladesh since independence. And this has been a footstep to bring...
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...--- 10 Company Profile Teck Resources Limited, formerly known as Teck Cominco Limited, was formed in 2001 following the merger of Cominco and Teck Corporation. It is a Canadian based integrated mining, mineral processing and metallurgical company. Seven years ago in 2001(1) when the Teck Cominco merger was completed, two strong Canadian companies with a tradition of excellence in mining and metal refining were brought together. In October of 2008 (1), the management of the company announced the launch of a simplified brand name, Teck, and the formation of five business units specializing in copper, metallurgical coal, zinc, gold and energy. The company has expertise across the full range of activities related to mining, including exploration, development, smelting, refining, safety, environmental protection, product stewardship, recycling and research. Presently they are actively exploring in countries throughout the Americas, Asia Pacific, Europe and Africa. The company’s product portfolio comprises of...
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...world of goods, but rings up a price when producing one. It costs twice as much as itself to make, and four billion of them are created a year. The US government dances around this problem and should have eliminate them back in 2006 when people were melting the copper and selling it for profit. This paper states several topics of why the penny only causes harm to US citizens and the economy. The obvious solution to fix a problem like this, simply abolish the penny as US currency, and round all cash transactions to the nearest fifth cent. Death of the Penny: The Elimination of America’s One Cent Coin and its Impact on The United States Economy “I will seriously consider eliminating the penny as long as we find another place for Lincoln to land,” the support of abolishing the penny from the most powerful man in America; President, Barack Obama. For over a hundred years people have paid for everyday goods with change, or coins. As inflation in the America rises, the value of coins diminishes. (Inflation Figures). Take the penny for example; commonly known as the copper coin has hardly any copper to it. Created with ninety-seven percent zinc and only two and a half percent copper, the penny doesn’t truly stand up to its expectations. Based on the 2011 Annual Report for US Mints, the cost to make a single penny runs around 2.41 cents. Studies have shown if the penny may be dropped as a piece of US currency, rounding up or down to the nearest...
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...TermPaperWarehouse.com - Free Term Papers, Essays and Research Documents The Research Paper Factory Join Search Browse Saved Papers Home Page » Social Issues Effect of Food Adulteration on Community Health In: Social Issues Effect of Food Adulteration on Community Health Effect of Food Adulteration on Community Health Health is wealth. People need to be cautious to keep their health well. We are required to take balanced diet and take regular exercise. We also have to maintain the standard of food. Now-a-days foods are being adulterated by mixing inferior but toxic and poisonous chemicals in it. It may also be done by removing some valuable substances from it. Food adulteration is done to degrade the quality and to increase the quantity for maximizing the profit. Every day we watch in the TV news how the unhygienic and spurious foods are entering into our houses. Adulteration of foods has many effects on individuals as well as on the community health. Food adulteration can cause immediate effect on human health. Diarrhea, dysentery, vomiting are such type of effects. Tamarind and date seed powder mixed with coffee powder can cause diarrhea. Adulteration on bakery items and dairy products may have tremendous effects on a child’s health. Such as cream-filled foods, cereal, cream sauces causes increased salivation, abdominal cramp, vomiting, prostration etc. Improperly processed milk and canned meat may cause food poisoning and abdominal...
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