Relevant bibliographies by topics / Complex-derived carbon

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Complex-derived carbon'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Complex-derived carbon"

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DelVecchia, Amanda G., Brian L. Reid, and Jack A. Stanford. "Methane-derived carbon supports a complex food web in the shallow aquifer." Food Webs 21 (December 2019): e00131. http://dx.doi.org/10.1016/j.fooweb.2019.e00131.

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Pérez-Cadenas, M., L. J. Lemus-Yegres, M. C. Román-Martínez, and C. Salinas-Martínez de Lecea. "Immobilization of a Rh complex derived from the Wilkinson's catalyst on activated carbon and carbon nanotubes." Applied Catalysis A: General 402, no. 1-2 (2011): 132–38. http://dx.doi.org/10.1016/j.apcata.2011.05.038.

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Meiser, Johannes, Sergey Tumanov, Oliver Maddocks, et al. "Serine one-carbon catabolism with formate overflow." Science Advances 2, no. 10 (2016): e1601273. http://dx.doi.org/10.1126/sciadv.1601273.

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Serine catabolism to glycine and a one-carbon unit has been linked to the anabolic requirements of proliferating mammalian cells. However, genome-scale modeling predicts a catabolic role with one-carbon release as formate. We experimentally prove that in cultured cancer cells and nontransformed fibroblasts, most of the serine-derived one-carbon units are released from cells as formate, and that formate release is dependent on mitochondrial reverse 10-CHO-THF synthetase activity. We also show that in cancer cells, formate release is coupled to mitochondrial complex I activity, whereas in nontra
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Ramakrishnan, Prakash, and Sangaraju Shanmugam. "Nitrogen-doped carbon nanofoam derived from amino acid chelate complex for supercapacitor applications." Journal of Power Sources 316 (June 2016): 60–71. http://dx.doi.org/10.1016/j.jpowsour.2016.03.061.

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Yadav, Vishal, Jesse B. Gordon, Maxime A. Siegler, and David P. Goldberg. "Dioxygen-Derived Nonheme Mononuclear FeIII(OH) Complex and Its Reactivity with Carbon Radicals." Journal of the American Chemical Society 141, no. 26 (2019): 10148–53. http://dx.doi.org/10.1021/jacs.9b03329.

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Cheng, Yinfeng, Baoqiang Li, Lei Wang, Daqing Wei, Yujie Feng, and Dechang Jia. "Fluorescent zinc doped carbon nanodots derived from chitosan/metal ions complex for cell imaging." Nanomedicine: Nanotechnology, Biology and Medicine 12, no. 2 (2016): 506–7. http://dx.doi.org/10.1016/j.nano.2015.12.171.

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Desguin, Benoît, Tuo Zhang, Patrice Soumillion, Pascal Hols, Jian Hu, and Robert P. Hausinger. "A tethered niacin-derived pincer complex with a nickel-carbon bond in lactate racemase." Science 349, no. 6243 (2015): 66–69. http://dx.doi.org/10.1126/science.aab2272.

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Lactic acid racemization is involved in lactate metabolism and cell wall assembly of many microorganisms. Lactate racemase (Lar) requires nickel, but the nickel-binding site and the role of three accessory proteins required for its activation remain enigmatic. We combined mass spectrometry and x-ray crystallography to show that Lar fromLactobacillus plantarumpossesses an organometallic nickel-containing prosthetic group. A nicotinic acid mononucleotide derivative is tethered to Lys184and forms a tridentate pincer complex that coordinates nickel through one metal-carbon and two metal-sulfur bon
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Shah, Syed Shaheen, and Md Abdul Aziz. "Agricultural product-derived carbon for energy, sensing, and environmental applications: A mini-review." Bangladesh Journal of Plant Taxonomy 27, no. 2 (2020): 467–78. http://dx.doi.org/10.3329/bjpt.v27i2.50686.

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Carbon is one of the versatile materials used in modern life for human welfare. It has a wide range of applications such as drug delivery, coatings, energy generation and storage, gas separation, water purification, sensor fabrication, and catalysis. Most of the widely used carbon materials are graphene and carbon nanotubes. Nonrenewable precursors (e.g., natural gas), toxic chemicals, and complex synthesis methods are often required for their preparation, limiting their wide practical applications. Besides these, biomass-derived carbons are attractive materials as they can be prepared simply
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Duan, Zhen Xiao, Tao Fang, Min Wang, and Guo Zhi Fan. "Chemical Fixation of Carbon Dioxide Catalyzed by Bimetallic Aluminum(Salen) Complex." Advanced Materials Research 549 (July 2012): 406–10. http://dx.doi.org/10.4028/www.scientific.net/amr.549.406.

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Bimetallic aluminum(salen) complexes were prepared and used as catalyst for the synthesis of DPC from CO2 and phenol in the presence of carbon tetrachloride. The bimetallic complex derived from 3,5-ditert salicylaldehyde and 1,2-cyclohexanediamine revealed more excellent activity than that obtained in the presence of other complexes and the simple Lewis acid ZnCl2. The influence of the amount of complex and the reaction conditions including the pressure of CO2 and the reaction temperature was also investigated.
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Inman, Christopher J., Alistair S. P. Frey, Alexander F. R. Kilpatrick, F. Geoffrey N. Cloke, and S. Mark Roe. "Carbon Dioxide Activation by a Uranium(III) Complex Derived from a Chelating Bis(aryloxide) Ligand." Organometallics 36, no. 23 (2017): 4539–45. http://dx.doi.org/10.1021/acs.organomet.7b00263.

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Dissertations / Theses on the topic "Complex-derived carbon"

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Brown, Steven Richard. "A design of experiments approach for engineering carbon metabolism in the yeast Saccharomyces cerevisiae." Thesis, University of Exeter, 2016. http://hdl.handle.net/10871/26158.

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The proven ability to ferment Saccharomyces cerevisiae on a large scale presents an attractive target for producing chemicals and fuels from sustainable sources. Efficient and predominant carbon flux through to ethanol is a significant engineering issue in the development of this yeast as a multi-product cell chassis used in biorefineries. In order to evaluate diversion of carbon flux away from ethanol, combinatorial deletions were investigated in genes encoding the six isozymes of alcohol dehydrogenase (ADH), which catalyse the terminal step in ethanol production. The scarless, dominant and c
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Kobielska, P. A., Richard Telford, J. Rowlandson, et al. "Polynuclear complexes as precursor templates for hierarchical microporous graphitic carbon: An unusual approach." 2018. http://hdl.handle.net/10454/16535.

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Yes<br>A highly porous carbon was synthesized using a coordination complex as an unusual precursor. During controlled pyrolysis, a trinuclear copper complex, [CuII3Cl4(H2L)2]·CH3OH, undergoes phase changes with melt and expulsion of different gases to produce a unique morphology of copper-doped carbon which, upon acid treatment, produces highly porous graphitic carbon with a surface area of 857 m2 g–1 and a gravimetric hydrogen uptake of 1.1 wt % at 0.5 bar pressure at 77 K.<br>EPSRC (EP/R01650X/1 for VPT, and EP/E040071/1 for MT) and the University of Bristol
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Hu, Tung-Ching, and 胡同慶. "Synthesis and Catalytic Activities of Palladium Complex Derived from Biphenyl-Containing N-heterocyclic Carbene Ligand With Extended Wingtip." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/84062306045592491101.

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Book chapters on the topic "Complex-derived carbon"

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Matsumoto, K., T. Katsuki, and I. W. C. E. Arends. "Using a Titanium Complex of a Proline-Derived Salan." In Stereoselective Synthesis 1 Stereoselective Reactions of Carbon—Carbon Double Bonds. Georg Thieme Verlag KG, 2011. http://dx.doi.org/10.1055/sos-sd-201-00036.

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Araújo, Kathleen. "French Nuclear Energy: Concentrated Power." In Low Carbon Energy Transitions. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199362554.003.0008.

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Nuclear energy is one of the most significant sources of low carbon energy in use in the power sector today. In 2013, nuclear energy represented roughly 11% of the global electricity supply, with growth projected to occur in China, India, and Russia (International Atomic Energy Agency [IAEA], n.d.a; NEA, n.d.). As a stable source of electricity, nuclear energy can be a stand-alone, base-load form of electricity or complement more variable forms of low carbon energy, like wind and solar power. Among the energy technologies considered here, nuclear energy is complex not only for the science behind it, but also for its societal, environmental, and economic dimensions.This chapter explores the rapid rise of French nuclear energy in the civilian power sector. It considers what a national energy strategy looks like under conditions of high concern about energy supply security when limited domestic energy resources appear to exist. The case reveals that centralized planning with complex and equally centralized technology can be quite conducive to rapid change. However, continued public acceptance, especially for nuclear energy, matters in the durability of such a pathway. France is a traditional and currently global leader in nuclear energy, ranking the highest among countries for its share of domestic electricity derived from nuclear power at 76% of total electricity in 2015 (IAEA, n.d.b). France is highly ranked for the size of its nuclear reactor fleet and amount of nuclear generation, second only to the United States. In 2016, this nation of 67 million people and economy of $2.7 trillion had 58 nuclear power reactors (CIA, n.d.; IAEA, n.d.b). Due to the level of nuclear energy in its power mix, France has some of the lowest carbon emissions per person for electricity (IEA, 2016a). France is also one of the largest net exporters of electricity in Europe, with 61.7 TWh exported (Réseau de Transport d’électricité [RTE], 2016), producing roughly $3.3 billion in annual revenue (World Nuclear Association [WNA], n.d). This European country has the largest reprocessing capacity for spent fuel, with roughly 17% of its electricity powered from recycled fuel (WNA, n.d.).
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Taber, Douglass F. "The Boger Synthesis of (-)-Vindoline." In Organic Synthesis. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199965724.003.0096.

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The periwinkle-derived alkaloids vinblastine 2a and vincristine 2b are still mainstays of cancer chemotherapy. The more complex half of these dimeric alkaloids, vindoline 1, presents a formidable challenge for total synthesis. Building on his previous work (Organic Lett. 2005, 7, 4539), Dale L. Boger of Scripps/La Jolla devised (J. Am. Chem. Soc. 2010, 132, 3685) a strikingly simple solution to this problem based on sequential cycloaddition. The starting point for the synthesis was the ester 3, derived from D-asparagine. This was extended to 4, condensation of which with 5 gave the enol ether 6. On heating, 7 cyclized to 8, which lost N2 to give the zwitterion 9. Addition of the intermediate 9 to the indole then gave 10. In one reaction, the entire ring system of vindoline, appropriately oxygenated, was assembled, with the original stereogenic center from D-asparagine directing the relative and absolute configuration of the final product. To complete the synthesis, the pendant carbon on 11 had to be incorporated into the pentacyclic skeleton. After adjusting the relative configuration of the secondary alcohol, the N was rendered nucleophilic by reduction of the amide to the amine. Oxidation delivered 14, which on activation as the tosylate smoothly rearranged to the ketone 15. Reduction and regioselective dehydration then completed the synthesis of vindoline 1.
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Taber, Douglass. "Transition Metal-Mediated Ring Construction: The Yu Synthesis of 1-Desoxyhypnophilin." In Organic Synthesis. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199764549.003.0075.

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Both 1 and 3 are inexpensive prochiral starting materials. Tae-Jong Kim of Kyungpook National University devised (Organomet. 2008, 27, 1026) a chiral Cu catalyst that efficiently converted 1 (other ring sizes worked as well) to the enantiomerically pure ester 2. Alexandre Alexakis of the University of Geneva found (Adv. Synth. Cat. 2008, 350, 1090) a chiral Cu catalyst that mediated the enantioselective coupling of 3 with Grignard reagents such as 4 . The π-allyl Pd complex derived from 6 is also prochiral. Barry M. Trost of Stanford University showed (Angew. Chem. Int. Ed. 2008, 47, 3759) that with appropriate ligand substitution, coupling with the phthalimide 7 proceeded to give 8, readily convertible to (-)-oseltamivir (Tamiflu) 9, in high ee. Jonathan W. Burton of the University of Oxford found (Chem Commun. 2008, 2559) that Mn(OAc)3 -mediated cyclization of 10 delivered the lactone 12 with high diastereocontrol. John Montgomery of the University of Michigan observed (Organic Lett. 2008, 10, 811) that the Ni-catalyzed cyclization of 12 also proceeded with high diastereocontrol. Ken Tanaka of the Tokyo University of Agriculture and Technology combined (Angew. Chem. Int. Ed. 2008, 47, 1312) Rh-catalyzed ene-yne cyclization of 14 with catalytic ortho C-H functionalization, leading to 16 in high ee. Eric N. Jacobsen of Harvard University designed (Angew. Chem. Int. Ed. 2008, 47, 1469) a chiral Cr catalyst for the intramolecular carbonyl ene reaction, that converted 17 to 18 in high ee. Using a stoichiometric prochiral Cr carbene complex 20 and the enantiomerically-pure secondary propargylic ether 19, Willam D. Wulff of Michigan State University prepared (J. Am. Chem. Soc. 2008, 130, 2898) a facially-selective Cr-complexed o -quinone methide intermediate, that cyclized to 21 with high ee. A variety of methods have been put forward for the transition metal-mediated construction of polycarbocyclic systems. One of the more powerful is the enantioselective Rh-catalyzed stitching of the simple substrate 22 into the tricycle 23 devised (J. Am. Chem. Soc. 2008, 130, 3451) by Takanori Shibata of Waseda University. Inter alia, ozonolysis of 23 delivered the cyclopentane 24 containing two all-carbon quaternary centers.
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Taber, Douglass F. "The Fuwa Synthesis of Didemnaketal B." In Organic Synthesis. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190646165.003.0097.

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Didemnaketal B 3 may be an artifact of isolation, derived from didemnaketal C, in which one of the methyl esters is instead an ethylsulfonate. Nevertheless, it is B, not C, that is a potent inhibitor of HIV protease. Haruhiko Fuwa of Tohoku University has provided (Chem. Eur. J. 2014, 20, 1848) a detailed account of the synthesis of 3, including the necessary revision of the absolute configuration of seven of the stereo­genic centers. A central feature of the modular synthesis of 3 was the cyclization of 1 to the thermodynamically most favorable diastereomer of the spiroketal 2. Three components were combined for the synthesis of 3. The upper sidechain was prepared from commercial citronellal 4. Reduction followed by protection and ozon­olysis delivered the aldehyde 5, that was carried on to the alkyne 6. Hydroiodination using the method previously reported by the authors (OHL May 30, 2011) gave 7, that was oxidized to 8 and then to the ester 9. Lactone formation by ring-closing metathesis is difficult because of the substantial preference for the extended conformation of the ester. As illustrated by the conversion of 10 to 11, this can be overcome by complexation with a Lewis acid. Conjugate addi­tion followed by phosphorylation completed the preparation of the enol phosphate 12. The third component of 3 was the lactone 15, prepared by deprotonation/kinetic protonation with 14 of 13. This was carried on to the sulfone 16, that was coupled with 17. Although the Julia–Kocienski reaction usually strongly favors the E alkene, in this case it was necessary to optimize both the base and the solvent. Sharpless asym­metric dihydroxylation followed by coupling with the enol phosphate 12 then completed the preparation of the diol 1. Addition of the ketene silyl acetal 18 to the aldehyde derived from 2 proceeded to give the undesired diastereomer 19. This was overcome by oxidation to the ketone followed by enantioselective reduction. The iodide 9 was added to the aldehyde 20 to give a 1.8:1 mixture of diastereomers, the major one of which was didemnaketal B 3. This full paper is worth reading in detail. The work reported underlines the impor­tance of powerful protocols for carbon–carbon bond formation that maintain high diastereocontrol in stereochemically complex environments.
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White, Robert E. "The Living Soil." In Understanding Vineyard Soils. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780199342068.003.0008.

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Soil is the living “skin” of the earth’s terrestrial ecosystem. Like skin, it is bom-barded by the sun’s radiation, wind, and rain and abraded by all manner of objects scraping its surface. Unlike skin, after an initial phase of weathering, soil develops primarily from the surface downward as plant and animal residues are continually added to the surface layer. These organic residues nourish a diverse population of organisms, feeding on the dead residues and on each other. In turn, they release mineral nutrients in an interminable cycle of growth, death, and decay, commonly called the carbon (C) cycle. Figure 5.1 is a diagrammatic representation of the C cycle in a vineyard. Green plants use energy from the sun to make carbohydrates, and subsequently proteins, lipids (fats), and other complex molecules, for their own growth and reproduction. As plant tissue matures, biochemical changes take place that lead to senescence; leaves yellow and eventually fall. In a perennial plant such as the grapevine, leaves are shed in winter but roots grow, age, and die all the time. Prunings may also be returned to the soil. Collectively, the above-ground plant material returned to the soil is called litter. Below ground, root fragments that are “sloughed off” and C compounds that leak from living roots constitute rhizo-C deposition. This below-ground C material is a readily accessible substrate (food) for microorganisms, which proliferate in the cylinder of soil surrounding each plant root, a zone called the rhizosphere. The rhizosphere is also the zone from which roots take up nutrients, as described in “The Absorbing Root,” chapter 3. When digesting and decomposing C substrate derived from litter and in the soil proper, organisms obtain energy and essential nutrients for growth. In so doing, in a healthy soil, they consume oxygen (O2) and release carbon dioxide (CO2) to the air below and above ground, thus completing the C cycle. Directly analogous to the process described for nitrogen (N) in chapter 3, C is said to be immobilized in the bodies of the soil organisms and mineralized when it is released as CO2.
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Clark, Gregory O., and William J. Kovacs. "Glucose, Lipid, and Protein Metabolism." In Textbook of Endocrine Physiology. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199744121.003.0018.

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The maintenance of life requires a constant supply of substrate for the generation of energy and preservation of the structure of cells and tissues. The process in principle is simple, yet the individual metabolic pathways and the regulation of substrate fluxes through these pathways can be complex. Energy is derived when fuel substrates are oxidized to carbon dioxide and water in the presence of oxygen, generating adenosine triphosphate (ATP). A portion of the ingested foodstuff is also utilized, either directly or after transformation into other substrates, to repair and replace cell membranes, structural proteins, and organelles. The remainder is stored as potential energy in the form of glycogen or fat. Under normal circumstances, each individual remains in a near-steady state where weight and appearance are stable over prolonged periods. In the short term, fuel metabolism changes dramatically several times a day during alternating periods of feeding and fasting. An anabolic phase begins with food ingestion and lasts for several hours. Energy storage occurs during this period when caloric intake exceeds caloric demands. The catabolic phase usually begins 4 to 6 hours after a meal and lasts until the person eats once again. During this phase, utilization shifts from exogenous to endogenous fuels, a change heralded by the mobilization of substrate stored in liver, muscle, and adipose tissue. Both anabolic and catabolic phases are characterized by specific biochemical processes regulated by distinct hormonal profiles. In the anabolic phase that follows ingestion of a mixed meal, substrate flux is directed from the intestine through the liver to storage and utilization sites. Glucose, triglyceride, and amino acid concentrations increase in plasma, whereas those of fatty acids, ketones (acetoacetic and β -hydroxy-butyric acids), and glycerol decrease. Both glycogen and protein synthesis begin in liver and muscle, while fatty acid synthesis and triglyceride esterification are stimulated in hepatocytes and adipose tissue. In the catabolic phase, the biochemical activities are reversed and the flux of fuel is directed from storage depots to liver and other utilization sites.
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Morrow, Gary W. "The Shikimate Pathway: Biosynthesis of Phenolic Products from Shikimic Acid." In Bioorganic Synthesis. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780199860531.003.0009.

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Like other amino acids, the aromatic amino acids phenylalanine, tyrosine, and tryptophan are vitally important for protein synthesis in all organisms. However, while animals can synthesize tyrosine via oxidation of phenylalanine, they can synthesize neither phenylalanine itself nor tryptophan and so these essential amino acids must be obtained in the diet, usually from plant material. Though many other investigators made significant contributions in this area over the years, it was Bernhard Davis in the early 1950s whose use of mutant stains of Escherichia coli led to a full understanding of the so-called shikimic acid pathway that is used by plants and also by some microorganisms for the biosynthesis of these essential amino acids. The pathway is almost completely devoted to their synthesis for protein production in bacteria, while in plants the pathway extends their use to the construction of a wide array of secondary metabolites, many of which are valuable medicinal agents. These secondary metabolites range from simple and familiar compounds such as vanillin (vanilla flavor and fragrance) and eugenol (oil of clove, a useful dental anesthetic) to more complex structures such as pinoresinol, a common plant biochemical, and podophyllotoxin, a powerful cancer chemotherapy agent. Earlier in Chapter 3, we encountered two important intermediates, erythrose-4-phosphate and phosphoenolpyruvate (PEP), each of which was derived from a different pathway utilized in carbohydrate metabolism. Erythrose-4-P was an intermediate in one of the steps of the pentose phosphate pathway while hydrolysis of PEP to pyruvic acid was the final step in glycolysis. These two simple intermediates provide the seven carbon atoms required for construction of shikimic acid itself. The two are linked to one another via a sequence of enzyme-mediated aldol-type reactions, the first being a bimolecular reaction and the second an intramolecular variant that ultimately leads to a cyclic precursor of shikimic acid known as 3-dehydroquinic acid as shown in Fig. 6.3. Subsequent dehydration of 3-dehydroquinic acid leads to 3-dehydroshikimic acid which then leads directly to shikimic acid via NADPH reduction.
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Deitcher, David. "Comic Connoisseurs." In Comic Art in Museums. University Press of Mississippi, 2020. http://dx.doi.org/10.14325/mississippi/9781496828118.003.0025.

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This chapter includes a 1984 article by art historian David Deitcher criticizing The Comic Art Show (Whitney, 1983) and the show catalog edited by John Carlin and Sheena Wagstaff. Deitcher explains: “A recent exhibition devoted to the complex, often antagonistic relation between comic strips and modern art submitted the comics to a paradigm of excellence derived from a fine art tradition, thereby reinforcing rather than reducing the familiar distinction between high and popular culture.”
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Taber, Douglass. "The Maier Synthesis of Cruentaren A." In Organic Synthesis. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199764549.003.0084.

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Cruentaren A 3, isolated from the myxobacterium Byssovorax cruenta, is an inhibitor of mitochondrial F-ATPase. The synthesis of 3 (Organic Lett. 2007, 9, 655; Angew. Chem. Int. Ed. 2007, 46, 5209) by Martin E. Maier of the Universität Tübingen illustrates the power of alkyne metathesis as a tool for the synthesis of complex natural products. Very recently, Alois Fürstner of the Max-Planck-Institut, Mülheim, reported (Angew. Chem. Int. Ed. 2007, 46, 9275) an alternative synthesis, also based on alkyne metathesis, of cruentaren A 3. The alcohol portion of 1 was prepared by Marshall homologation of 4 with 5, leading to 6. Homologation of the derived epoxide 7 then gave 8. Note that the homologation of 7 to 8 required three steps. This might have been accomplished more directly with the Li salt of 1-propyne, easily prepared from commercial 1- or 2-bromopropene. Evans auxiliary-controlled homologation of 9 set the relative and absolute configuration of 10, which was carried on to 12. To effect coupling, the acid of 12 was activated with carbonyl diimidazole, then condensed with the bis-alcoholate of 8. This acylation was highly regioselective, giving 1 as the only observed product. Cruentaren A 3 has two Z alkenes, so the authors chose a bis-alkyne strategy, with a partial hydrogenation of both alkynes at the end of the synthesis. To this end, alkyne metathesis was accomplished with the Schrock tungsten carbine catalyst 13. Homologation to 15 followed by deprotection and hydrogenation then gave enantiomerically pure cruentaren A 3.
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Conference papers on the topic "Complex-derived carbon"

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Ke, Changhong. "Development of a Carbon Nanotube-Based Electromechanical Resonator: Device Modeling." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-69182.

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We present an electromechanical analysis of a novel double-sided driven carbon nanotube-based electromechanical resonator. The device comprises a cantilevered carbon nanotube actuated by two parallel-plate electrodes. Close-form analytical solutions capable of predicting the steady-state resonation of the device and its resonant pull-in conditions are derived using an energy-based method. Our close-form formulas clearly reveal the complex relationship among the device geometry, the driving voltages, and the device’s electromechanical dynamics. Our theoretical modeling shows that the stable ste
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Joshi, Girija K., Mihira N. Acharya, Marie Van Steene, et al. "Direct TOC Quantification in unconventional Kerogen-rich Shale Resource Play from Elemental Spectroscopy Measurements: A Case Study from North Kuwait." In SPE Middle East Unconventional Resources Conference and Exhibition. SPE, 2015. http://dx.doi.org/10.2118/spe-172975-ms.

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Abstract The deep organic-rich calcareous Kerogen of North Kuwait, a continuous 50ft thinly alternating carbonate – organic-rich argillaceous sequence, is not only a source rock but has gained importance as potential reservoirs themselves of typical unconventional category. Resource play or Kerogen characterization relies on quantifying total organic carbon (TOC) and estimating accurate mineralogy. This paper describes the first attempt to directly measure total organic carbon of the Limestone-Kerogen sequence. For the present study, empirical estimations of TOC have been carried out based on
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Oyadiji, S. O., and G. R. Tomlinson. "Controlling the Vibration Levels of Vibrating Vanes Using Viscoelastic Materials." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0634.

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Abstract The vibration characteristics of a carbon composite outlet guide vane (CCOGV), whose ends were embedded in a viscoelastic medium, were analysed by means of the finite element method. The elastic CCOGV and the viscoelastic material were modelled using twenty-noded solid brick elements. Both isotropic and orthotropic material models were used to characterise the elastic behaviour of the CCOGV. The Young’s modulus and loss factor data of the viscoelastic material were derived from the master curves of complex Young’s modulus of the material. These master curves were obtained via the appl
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Aluko, O., and H. A. Whitworth. "Contact Stress Analysis Around Elliptic Pin-Loaded Holes in Orthotropic Plates." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-37662.

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This analysis utilizes the complex stress function approach to obtain the stress distribution in pin loaded composite joints with elliptic openings. The stress functions were derived from assumed displacement expressions that satisfy the boundary conditions around the hole. In the method of solution Coulomb friction was used to determine the prescribed displacements at the boundary. The material properties of graphite/epoxy and carbon fiber reinforced plastics laminates were used in this investigation and the results also compared with available data for joints with circular openings. It was r
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Barr, B. W., and O. A. Ezekoye. "Analysis of the Equilibrium Approximation in Chemical Ablation of Thermal Protective Systems." In ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ht2012-58462.

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A quasi-steady-state ablation model is used to investigate the behavior of thermochemically ablating systems in equilibrium and nonequilibrium surface thermochemistry regimes. The model is simplified to allow extraction of relevant nondimensional parameters and comparison with existing experimental data on solid carbon combustion. Good agreement is found between model predictions and experimental data, and the data and model are collapsed in terms of the B number and surface Damkohler number. A new formulation for the surface Damkohler number is proposed, and a relationship between the B numbe
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Alexander, Brentan R., and Ahmed F. Ghoniem. "Analysis and Optimization of the Coupled Parameters of the Graz Cycle." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-50588.

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The Graz Cycle is a unique power cycle design that has been proposed for the conversion of coal derived syngas or natural gas into mechanical energy while capturing carbon dioxide. The hydrocarbon is burned in pure oxygen, and water is condensed before a portion of the products are recycled back. Previous analyses have shown theoretical efficiencies of 56.12% [1]. Such a high theoretical efficiency, combined with carbon dioxide capture, makes this cycle design highly attractive. Little previous work has gone into optimizing the Graz Cycle design. Optimizing complex power cycles is complicated
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Cross, E. S., A. Sappok, E. C. Fortner, et al. "Real-Time Measurements of Engine-Out Trace Elements: Application of a Novel Soot Particle Aerosol Mass Spectrometer for Emissions Characterization." In ASME 2011 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/icef2011-60100.

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Lubricant-derived trace element emissions are the largest contributors to the accumulation of incombustible ash in diesel particulate filters (DPF), eventually leading to filter plugging and an increase in engine fuel consumption. Particulate trace element emissions also pose adverse health effects and are the focus of increasingly stringent air quality regulations. To date, the rates and physical and chemical properties of lubricant-derived additive emissions are not well characterized, largely due to the difficulties associated with conducting the measurements. This work investigated the pot
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Sui, P. C., N. Djilali, and Qianpu Wang. "A Pore Scale Model for the Transport Phenomena in the Catalyst Layer of a PEM Fuel Cell." In ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASMEDC, 2008. http://dx.doi.org/10.1115/mnht2008-52152.

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In a proton exchange membrane fuel cell (PEMFC), the catalyst layer is a porous medium made of carbon-supported catalysts and solid electrolyte, and has a thickness in the order of 10 μm. Within this layer, complex transport phenomena take place: transport of charged species (H+, electrons and ionic radicals), non-charged species (gaseous H2O, O2, H2, N2 and liquid water) and heat transfer occur in their own pathways. Furthermore, phase change of water and physiochemical/electrochemical reactions also take place on phase boundaries. These transport process take place in an intertwined network
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Saleh, Khaled, Aly Morad, Chiara Cavalleri, et al. "DERIVING SYNTHETIC BULK DENSITY USING FAST NEUTRON CROSS-SECTION IN A LOG-INTEGRATED APPROACH FROM SLIM PULSED NEUTRON LOGGING IN CASED-HOLE ENVIRONMENT." In 2021 SPWLA 62nd Annual Logging Symposium Online. Society of Petrophysicists and Well Log Analysts, 2021. http://dx.doi.org/10.30632/spwla-2021-0098.

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Recent advancement in logging technology and data analytics allows measuring a comprehensive set of formation petrophysical properties and rock composition in cased boreholes. State-of-the-art pulsed neutron logging technology and processing algorithms record capture and inelastic elemental spectroscopy for matrix parameters, and detailed mineralogy characterization, total organic content estimation, and carbon/oxygen analysis, simultaneously with formation sigma, neutron porosity, and fast neutron cross-section. The fast neutron cross-section (FNXS) is a new formation nuclear property introdu
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Yilmaz, M., H. Koten, and M. Zafer Gul. "A CFD Study on Heavy Duty DI Diesel Engine to Achieve Ultra-Low Emissions." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24746.

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Nowadays, automotive industries focused on clean diesel combustion in their combustion processes are investigated for their potential to achieve near zero particulate and NOx (Nitrogen oxides) emissions. Their main disadvantages are increased level of unburned hydrocarbons (HC) and carbon monoxide (CO) emissions, combustion control at high load, power output and limited operating range. The simulation of the air flow, spray and combustion in an internal combustion engine were prepared for a single cylinder of a nine-liter, six cylinder diesel engine. Many times the geometry is complex because
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