oxygen concentrations‚ moisture levels‚ hydrostatic pressure‚ osmotic pressure‚ and radiation levels. When considering the pH level‚ bacteria are classified as either acidophiles (acid-loving)‚ neutrophiles (neutral ph range)‚ or alkaliphiles (alkali-loving). The one that causes disease in humans would be the neutrophiles‚ which have an ideal pH range of 5.4 to 8.0. There are exceptions‚ however‚ like Alcaligenes faecalis and Vibrio choleae‚ which are both alkaliphiles and can infect humans
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an ether bond opposed to an ester bond in their phospholipid bilayer membrane which surrounds the cell. This ether linkage is chemically far more resistant than the ester linkage‚ allowing the archaeon to be far more resistant to extreme acidic or alkali environments and high temperatures and so on. However‚ in this sample of sediment from the Marianas Trench‚ the DNA of Pseudomonas‚ a genus of bacteria‚ was found along with other marine Archaea DNA: so even though Archaea are better adapted to chemically
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larger and greater specifications are desired. The initial step of metallurgy should be to create aluminium oxide. In alumina oxide production with sintering process‚ we need to first create the raw materials compounded by bauxite‚ limestone and alkali into clinker. The sintering process is completed within the vertical roller mill whose inner temperature is 1300℃. The final phase of aluminium oxide manufacturing is to roast aluminum hydroxide into alumina oxide. The inner temperature is about 1200～1250℃
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Corrosion Let metal sit surrounded by oxygen for a while and the metal will corrode. Corrosion is the chemical reaction that takes place when a metal is in contact with oxygen. The metal reacts with the oxygen to form a compound called an oxide on the surface of the metal. The metal becomes tarnished and loses its shine. Metals high in the reactivity series (an observable series of metals‚ in order of reactivity from highest to lowest) corrode more quickly than less reactive metals
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Ordinary Portland Cement. (b) What are the main compounds into which the above oxides will transform in the process of fusion?. 2. (a) Explain the phenomenon of bulking of fine aggregates and its practical significance in mix proportioning. (b) Explain Alkali-aggregate reaction and its effect on the final product of concrete. 3. (a) List out various field and laboratory tests that are conducted to assess the properties of fresh concrete. (b) Explain Compaction Factor test describing the test equipment
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Identification of Metallic Ions Pre Lab Questions: 4pts 1. What are the learning goals of this experiment? To perform and observe the flame tests of some alkali and alkaline earth metal ion 2. Define ground state and excited state of an atom. Ground state- normal configuration of the electrons about the atom or the ion of an element; stable particle electrons are at lowest possible energy level Excited state- when stable particles are heated to very high temperatures some of the electrons leave
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and effective operation of the cement kiln system‚ which has become an important issue for cement plant to increase capacity. The status and characteristics of China’s cement industry are large output‚ high kiln temperature‚ fast kiln speed‚ heavy alkali corrosion‚ complex structure and high energy efficiency requirements. In the last year China’s cement production hit a new record of 1.868 billion tons. It is expected that this year the demand on cement market will remain strong and the production
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polymerization of propylene. There are three main grades of polypropylene produced: homopolymer‚ co-polymer‚ and impact co-polymer. Polypropylene possesses intrinsic properties of high stiffness‚ good tensile strength‚ and inertness toward acid‚ alkalis‚ and solvents‚ which makes it suitable for applications in various industries such as Packaging‚ Automotive‚ Consumer Goods‚ Construction‚ and Electrical and Electronics. Covered in this Report This report covers the present scenario and the
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was left to heat for approx. 25-30 minutes. 9. The solution was then left over the weekend to dry out. Results: Conclusion: Hydrochloric Acid (HCl) + Sodium Hydroxide (NaOH) = Sodium Chloride (NaCl) + Water (H2O) (acid + alkali = salt + water) In conclusion‚ the same amount of HCl mixed with NaOH forms an ionic bond between the two elements. The ionic bond/electrovalent bond that was formed was that of sodium chloride ‘salt’. The bond made visible salt crystals in the
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Flame Test Laboratory Report Introduction The purpose of this lab is to observe and identify metallic ions‚ using flame tests. The traditional flame test originated when Robert Bunsen invented the Bunsen burner to test two new alkali metals he and his partner had discovered. “A flame test is an analytic procedure used in chemistry to detect the presence of certain elements‚ primarily metal ions‚ based on each element’s characteristic emission spectrum” (Flame Test 1). Using this test‚ an element
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