Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 167 for “"Carbon atoms"”.
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Reactions of energetic carbon atoms produced by ¹²C(p,pn)¹¹C in alkanes and alkyl chlorides: moderator effects and deuterium isotope effects
The reactions of energetic carbon atoms produced by the nuclear reaction ¹²C(p,pn)¹¹C in some specifically-deuterated ethanes and propanes were investigated.
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Thermal properties of graphene
The two-dimensional (2D) monolayer structure of carbon atoms were initially considered as unstable. The 2D materials have recently been discovered and many researchers have started analyzing these materials. Graphene, a two-dimensional allotrope of graphite with sp2 bonded carbon atoms, is arranged …
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Low-Energy Electron Impact Fragmentations of the Polycyclic Aromatic Hydrocarbon Anthracene
… The groups of fragments containing 8 to 13 carbon atoms provide evidence for hydrogen rearrangements during fragmentation, involving the retention or loss of one or two additional hydrogen atoms. Groups of fragments with 6 and 7 carbon atoms clearly show the presence of doubly-charged …
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The role of the free fatty acid, lauric acid, in appetite regulation and its potential as an appetite-suppressant.
… length established that fatty acids with ≥ 12 carbon atoms slow gastric emptying, while fatty acids with ≤ 10 carbon atoms have no effect, indicating that there may be a separation in the effects of fatty acids occurring between those with ≤ 10 and ≥ 12 carbon atoms. More recent studies in …
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The Tca Cycle As A Nexus of Metabolic Vulnerabilities In Cancer
… in the TCA cycle. Continuous efflux of carbon atoms from the TCA cycle for biosynthetic and catabolic oxidative reactions requires carbon atoms to be replenished by a process called anaplerosis. The work in this thesis shows that impinging on TCA cycle anaplerosis, either by impairing …
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Development and characterisation of novel low-friction wear-resistant multiplayer nanocomposite CrAlTiCN coatings
… to generate novel CrAlTiCN coatings with the carbon content up to 24.34 at% by closed-field unbalanced magnetron sputtering of graphite target. The microstructure of the CrAlTiCN coatings mainly depends on their carbon content. When the carbon content is low, carbon atoms are mainly dissolved …
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Combustion synthesis of fullerenes and fullerenic nanostructures
… are molecules comprised entirely of sp²-bonded carbon atoms arranged in pentagonal and hexagonal rings to form a hollow, closed-cage structure. Buckyballs, a subset which contains C₆₀ and C₇₀, are single-shell molecules while fullerenic nanostructures can contain many shells and over 300 carbon …
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Synthesis Of Alkylthiol-containing Fluorene Derivatives For Gold Nanoparticle Functionalization
… two alkyl chains containing different number of carbon atoms at the 9 position on the fluorene ring system. The methodology that was developed gave enough scope for performing Radiative Decay Engineering (RDE) studies, in order to investigate the impact of gold nanoparticles on the singlet oxygen …
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Computing Wall Thickness and Young's Modulus of Carbon Nanotubes with Atomistic Molecular Dynamics Simulations
Carbon nanotubes (CNTs) are tubular structure of a layer or layers of carbon atoms. CNTs serve as a prototypical nanomaterial holding great promises for various basic and applied research applications in the fields of electrical, thermal, and structural materials owing to their superlative …
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Nuclear magnetic resonance study of the structure of simple molecules adsorbed on metal surfaces: Acetylene on platinum
… a single and double bond, suggesting that both carbon atoms bond to the surface.
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Study of electronic structures of carbon and silicon clusters
In the last two decades the research on carbon and silicon has received a strong impulse since two discoveries have multiplied the perspectives of applications: <br>- The existence of pure carbon molecules in the form of hollow cages with highly symmetric structure – fullerenes. <br>- The …
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Nuclear Magnetic Resonance Study of the Structure of Simple Molecules Adsorbed on Metal Surfaces: Acetylene on Platinum (Slow Beat, Double Resonance, Multi Quantum)
… a single and double bond, suggesting that both carbon atoms bond to the surface.
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Low-Temperature Gas-Phase Nitriding and Nitrocarburizing of 316L Austenitic Stainless Steel
… The concentration depth profiles of nitrogen and carbon atoms can all be described as an outer layer of nitrogen-enriched region, with carbon atoms accumulated at the diffusion front of nitrogen. The total case depth obtained is mainly determined by the diffusion time of carbon. Grazing angle XRD …
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“Trans-Positioning” Carbons within Strained Caged Bicyclic(s): ROM/RCM (Ring-Opening/Ring-Closing) Metathesis and Dieckmann/Retro-Dieckmann Condensation Routes to a Cis-Decalin Infrastructure
… motif engaging strategically positioned carbons within a strained bi-carbocyclic core and on a tethered free-dangling hydrocarbon chain ultimately for skeletal rearrangement. Trans-alkenylation and trans-acylation processes are devised for investigation with bicyclo[2.2.2]octyl and …
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Study of Plasmon Resonances in Single Photoionization of Carbon Fullerene Molecular Ions
Beams of carbon fullerene ions containing 40 to 84 carbon atoms were irradiated by monochromatized synchrotron radiation at photon energies ranging from 18-70 eV at 0.5 eV intervals. Single photoionization was studied over this energy range using a merged-beams research endstation at the Advanced …
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(S) y (R) -N-BOC, O-Isopropiliden-Alfa-Metilserinales: utilización como precursores de productos de interés biológico
… active organic compounds that contain quaternary carbon atoms. Likewise, we have explored the applications of these compounds in the asymmetric synthesis of several products of considerable importance as several a-methyl-a-amino acids and the 4-epi-L-vancosamina, carbohydrate of different …
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Characterisation of the Microbial Community in Indoor Environments: a Chemical-Analytical Approach
… (3-hydroxy fatty acids with 10-16 carbon atoms), gram-positive bacteria (branched-chain fatty acids with 15 and 17 carbon atoms), bacterial peptidoglycan (muramic acid), and fungal biomass (ergosterol). A hydrolysate of 13C-labelled cyanobacterial cells was used as an internal …
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