Reaction mechanism of tert-butylation of phenol with tert-butyl alcohol over H-beta zeolite: An ONIOM study | 作者: Nie‚ XW (Nie‚ Xiaowa)1‚3‚4; Janik‚ MJ (Janik‚ Michael J.)2; Guo‚ XW (Guo‚ Xinwen)1; Liu‚ X (Liu‚ Xin)1; Song‚ CS (Song‚ Chunshan)1‚2‚3‚4 | 来源出版物: CATALYSIS TODAY 卷: 165 期: 1 页: 120-128 DOI: 10.1016/j.cattod.2010.11.070 出版年: MAY 16 2011 | 被引频次: 2 (来自 Web of Science) | 引用的参考文献: 50 [ 查看 Related Records ] 引证关系图 | 摘要: Tert-butylation of phenol with tert-butyl alcohol
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thin and had stress-concentrating corners. Also‚ materials such as vanadium steel‚ which was chosen for its good mechanical properties corroded rapidly in the body and caused adverse effects on the healing processes 1930s: Stainless steels and cobalt chromium alloys were introduced and great success was achieved in fracture fixation‚ and soon joint replacement surgeries were performed Biomaterials‚ Joyce Y Wong and Joseph D Bronzino (Eds)‚ CRC Press‚ Boca Raton‚ FL‚ 2007 4 History
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What chemical compounds does the human body consist of? Oxygen (65%) and hydrogen (10%) are predominantly found in water‚ which makes up about 60 percent of the body by weight. It’s practically impossible to imagine life without water. Carbon (18%) is synonymous with life. Its central role is due to the fact that it has four bonding sites that allow for the building of long‚ complex chains of molecules. Moreover‚ carbon bonds can be formed and broken with a modest amount of energy‚ allowing
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Gross Domestic Product (GDP) has grown by 1.4% in 2009‚ according to official statistics. Cuba produces‚ sugar‚ citrus‚ tobacco‚ coffee‚ rice‚ beans‚ meat‚ tropical fruits‚ and vegetables. The average monthly salary is about 18$. Cuba exports nickel/cobalt‚ oil‚ oil derivatives‚ pharmaceutical and bio-tech products‚ sugar and it’s byproducts‚ tobacco‚ seafood‚ citrus‚ tropical fruits‚ and coffee. Cuba’s major exports are Canada‚ China‚ Venezuela‚ Netherlands‚ Spain‚ Singapore‚ Italy‚ and Russia. 1U
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interferes with the metallic lattice of cations in the pure metal‚ and as a result the physical properties of the metal are altered * steels are alloys of iron‚ with different quantities of carbon and other metals (titanium‚ chromium‚ molybdenum‚ cobalt‚ nickel‚ manganese‚ tungsten) added to create desired properties: * chromium makes steel harder and more resistant to corrosion * manganese makes steel stronger‚ harder and more resistant to wear * silicon makes steel more resilient
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Ideal gases: No volume‚ no intermolecular forces Atoms/Molecules that are gases at room temperature Noble Gases. H2‚ N2‚ O2‚ F2‚ Cl2. Methane‚ ethane‚ propane‚ butane Gas: Fills the container. Forces of intermolecular attraction are weak. Vapor: Gas state of a substance that is usually a liquid or solid Ek = (Kinetic energy of a gas molecule) Mu2/2. U2 = 3 (R Gas Constant) (Temperature in Kelvin) / molar mass in kg Speed goes Up with temp and down with mass Pressure: Collisions with the side of a
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Introduction The ceramic piece‚ “Braying Camel‚” is located at the Baltimore Museum of Art in Baltimore‚ MD. It is a beautiful work of art with rich tones of color. The splashing technique is applied so elegantly. This work is a representation of the Bactrian camel‚ who were instrumental to the Tang Dynasty (618-907 CE) for travel‚ trading‚ and making China the most prosperous country in the world. Tang Dynasty Art Many of the Tang artists were scholars‚ especially studying the principals of Confucius
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Continental Automotive Systems är ett tyskt företag som utvecklar styrsystem för olika tillämpningar i bilar. Bland annat utvecklas ett styrsystem till eldrivna bakluckor som öppnas och stängs av föraren per knapptryck. Själva drivanordningen består av en skruv som drivs av en likströmsmotor över en utväxling och en fjäder. READ MOREBrushless DC Motors are an important class of highly efficient electric motors. They are most frequently used in electric vehicles because of their high efficiency and
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Nathan Jingst Mrs. Miller Spanish II 31 October 2014 Geography of Cuba Cuba is located in the Caribbean‚ and is the largest island there. Technically‚ the country does not border any other countries. The United States leases Guantanamo Bay‚ a military prison‚ in an eastern section of the country (Geography). Other than this‚ Cuba is completely surrounded by water. Cuba has an area of 42‚803 sq. miles. It is about 760 miles long‚ and about 55 miles wide. Its closest neighbor is Haiti‚ about 50 miles
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saved many lives. Another pro would be food irradiation which is the method of treating food in order to make it safer to eat and have a longer shelf life. The important part of food irradiation is by exposing it to the gamma rays of a radioisotope cobalt-60 the energy from the gamma ray passing through the food to destroy many disease-causing bacteria. The gamma ray stops the bacteria that causes food to spoil‚ but is not strong enough to change the quality‚ flavor or texture of the food. Lastly doctors
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