leaves and loss of fruiting bodies Copper (Cu) Dieback of stems and twigs‚ yellowing of leaves‚ stunted growth and pale green leaves that wither easily. Iron (Fe) Interveinal tissues in young leaves started to green followed by complete yellowing to almost white‚ and then browning. Manganese Interveinal chlorosis but not as (Mn) distinct as in iron deficiency followed by brown necrotic spots delayed maturity and white/gray spots on some cereal crops. Molybdenum General yellowing at older leaves (Mo)
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Chemistry: Research task 1 5.1- define the terms mineral and ore with reference to economic and non-economic deposits of natural resources The term ‘ore minerals’ is commonly referred to as economic minerals Mineral: naturally occurring compounds. Rocks are mixtures of various minerals. Most minerals are lattice structures‚ both ionic and covalent. Economic minerals have been divided into two main categories: Metalliferous minerals- mined to extract a metal Industrial mineral- either has
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The present work investigates the mechanical properties and tribological behavior of Al-B4C composites. Attempts were made to overcome the wetting problem between B4C and liquid aluminium at lower temperatures for promising the mechanical and tribological behaviour of the Al -B4C composites. AA6061-B4C particle reinforced composites were produced through casting route at 850ºC with K2TiF6 added as flux to overcome the wetting problem between B4C and liquid aluminium metal. The Aluminium B4C composite
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296 HANDOUT: CONTINUOUS FLOW (PRODUCT ORIENTED LAYOUT) AND BOTTLENECK ANALYSIS Reference: Operations Management by Mark A. Vonderembse and Gregory P. White. The Product Layout and System Capacity The capacity of a product-oriented system can be visualized as a series of pipes of varying capacity‚ with the smallest diameter or capacity holding back the entire system. Exhibit 9.3 illustrates five pipes (departments or machines) with different diameters (capacities). The output
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Problem: What methods could be used to extract materials from the given mixture that contains iron filings‚sand‚salt and small stones? Background There are things that must be understood before doing this lab. The first thing that must be understood is a mixture. A mixture has two or more pure substances‚ and the substances keep their chemical compositions (study.com).The next thing to apprehend is filteration. Filtration is a method used to separate a solid that isn’t dissolved in water. Another
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Extraction of Aluminium Aluminium ore is called bauxite. Bauxite contains aluminium oxide‚ water‚ iron oxide and other impurities. The purified dry ore‚ called alumina‚ is aluminium oxide (Al2O3). The alumina must be molten for electrolysis to work‚ since the ions are not free to move in the solid state. Unfortunately‚ alumina has a high melting point (2040 °C) and it is not practical to do electrolysis at such a high temperature. In the middle of the nineteenth century it was found that alumina
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adding additional mass. Ex. The iron filings having some sand particles leftover. A yield under 100% would mean that some of the substance was not recovered‚ it could have been lost (spilled) or found in another substance (not separated completely). The percent yields may give some insight into what occurred during the procedure. For example if the percent of iron is >100‚ but the percent of sand is <100 then it may show that some sand was not separated from the iron‚ and was measured with that material
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obtained from many experiences. Table 1.2 shows an average amount of shrinkage for important cast metals. Table 1.2 Typical shrinkage allowances for important casting metals Type of metal Amount of shrinkage (%) Grey cast irons 0.55-1.00 White cast irons 2.10 Malleable cast irons 1.00 Steels 2.00 Manganese steel 2.60 Magnesium 1.80 Type of metal Zinc Brasses Bronzes Aluminium Aluminium alloys Tin Amount of shrinkage (%) 2.60 1.30-1.55 1.05-2.10 1.65 1.30-1.60 2.00 In practice‚ pattern makers use
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The uncommonly known Bessemer process sparked a turning point in the 1850’s. A process designed to yield steel at a much faster rate allowed for a development in traditional structures‒bridges‚ buildings‚ and skyscrapers‒as well as advanced economic theory and practices and their relation to a successful business model. Revolutionaries such as Andrew Carnegie (a successful entrepreneur) and James Buchanan Eads (an engineer specializing in bridges) paved the way for practices and techniques still
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number of layers of zinc atoms around a piece of galvanized iron. This was done by pouring the hydrochloric acid onto the galvanized iron‚ thus removing the zinc from the piece of metal. Laboratory Procedure 1. Measured and recorded the mass of a piece of galvanized iron using a centigram balance and a ruler 2. Measured and recorded the length and width of the galvanized iron using the ruler 3. Put the piece galvanized iron into a 400-ml beaker 4. Added 25mL of hydrochloric acid
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