Current Search: Carbon (x)
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Title
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Does the presence of nonprofits carbon offset groups enhance public stakeholder and private shareholder values in public-private partnerships?.
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Creator
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Bauer, Daniel G., Sapat, Alka K., Graduate College
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Date Issued
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2011-04-08
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PURL
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http://purl.flvc.org/fcla/dt/3164808
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Subject Headings
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Carbon sequestration --California, Carbon offsetting, Emissions trading
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Format
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Document (PDF)
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Title
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Life suppot materials in a manned submersible.
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Creator
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Wang, Tsen C.
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Date Issued
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1982-02
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PURL
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http://purl.flvc.org/fcla/dt/3358776
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Subject Headings
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Submersibles, Carbon dioxide mitigation
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Format
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Document (PDF)
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Title
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Nutrient availability to marine macroalgae in siliciclastic versus carbonate-rich coastal waters.
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Creator
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Lapointe, Brian E., Littler, Mark M., Littler, Diane S.
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Date Issued
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1992
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PURL
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http://purl.flvc.org/FCLA/DT/3174860
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Subject Headings
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Microalgae, Carbon, Nitrogen, Phosphorus
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Format
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Document (PDF)
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Title
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Vibration of nonlocal carbon nanotubes and graphene nanoplates.
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Creator
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Hache, Florian, Elishakoff, Isaac, Challamel, Noël, Florida Atlantic University, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
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Abstract/Description
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This thesis deals with the analytical study of vibration of carbon nanotubes and graphene plates. First, a brief overview of the traditional Bresse-Timoshenko models for thick beams and Uflyand-Mindlin models for thick plates will be conducted. It has been shown in the literature that the conventionally utilized mechanical models overcorrect the shear effect and that of rotary inertia. To improve the situation, two alternative versions of theories of beams and plates are proposed. The first...
Show moreThis thesis deals with the analytical study of vibration of carbon nanotubes and graphene plates. First, a brief overview of the traditional Bresse-Timoshenko models for thick beams and Uflyand-Mindlin models for thick plates will be conducted. It has been shown in the literature that the conventionally utilized mechanical models overcorrect the shear effect and that of rotary inertia. To improve the situation, two alternative versions of theories of beams and plates are proposed. The first one is derived through the use of equilibrium equations and leads to a truncated governing differential equation in displacement. It is shown, by considering a power series expansion of the displacement, that this is asymptotically consistent at the second order. The second theory is based on slope inertia and results in the truncated equation with an additional sixth order derivative term. Then, these theories will be extended in order to take into account some scale effects such as interatomic interactions that cannot be neglected for nanomaterials. Thus, different approaches will be considered: phenomenological, asymptotic and continualized. The basic principle of continualized models is to build continuous equations starting from discrete equations and by using Taylor series expansions or Padé approximants. For each of the different models derived in this study, the natural frequencies will be determined, analytically when the closed-form solution is available, numerically when the solution is given through a characteristic equation. The objective of this work is to compare the models and to establish the eventual superiority of a model on others.
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Date Issued
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2018
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PURL
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http://purl.flvc.org/fau/fd/FA00013019
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Subject Headings
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Carbon nanotubes, Graphene, Vibration
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Format
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Document (PDF)
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Title
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MICROFLUIDICS FOR CARBON CAPTURE AND SEQUESTRATION.
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Creator
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Seo, Seokju, Kim, Myeongsub (Mike), Florida Atlantic University, Department of Ocean and Mechanical Engineering, College of Engineering and Computer Science
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Abstract/Description
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Carbon capture and sequestration (CCS) has been considered a promising technology for mitigating heavy atmospheric carbon dioxide (CO2) concentration as an immediate response to global climate change and ocean acidification. Despite various previous studies on CCS, there has been a paucity of research to overcome many of the challenges. In geological carbon sequestration, there are two major issues in achieving a feasible means of storing CO2. The first is the slow reaction of carbonic acid ...
Show moreCarbon capture and sequestration (CCS) has been considered a promising technology for mitigating heavy atmospheric carbon dioxide (CO2) concentration as an immediate response to global climate change and ocean acidification. Despite various previous studies on CCS, there has been a paucity of research to overcome many of the challenges. In geological carbon sequestration, there are two major issues in achieving a feasible means of storing CO2. The first is the slow reaction of carbonic acid (H2CO3) formation from the reaction between injected CO2 and brine. Another technical challenge to the realization of industrial-scale carbon sequestration is the drying-out of brine induced by CO2 advection. The resident brine near a wellbore area is rapidly evaporated while precipitating significant amounts of salt at pores when gaseous CO2 is continuously injected into these aquifers. On the other hand, in industrial post-carbon capture processes, monoethanolamine (MEA) has been dominantly used as an absorption solvent. However, it generates significant amounts of toxic wastewater containing chemicals difficult to treat. The objectives of this thesis are to address these challenges in CCS, making the CCS technology feasible and competitive. An innovative method for geologic carbon sequestration, namely nickel nanoparticles (Ni NPs) addition to the injection fluid was developed and evaluated, to address issues of the slow reaction in deep saline aquifers. The catalytic activity of Ni NPs was evaluated using the microfluidic technique to confirm their possibility of additive for enhancing CO2 hydration in deep saline aquifers. First of all, to achieve acceleration of CO2 dissolution under reservoir-specific conditions, the catalytic effect of Ni NPs was investigated by monitoring change in CO2 bubble size at various Ni NPs concentration, pH, and different levels of salinity. Then, steric stabilization of Ni NPs by adsorbing polymers has been studied to further enhance Ni NPs’ catalytic activity. Second, to overcome the brine drying-out challenge, a new strategy of sequential water injection with CO2 was proposed. This sequential injection strategy showed great potential for preventing aquifer formation damage by decreasing brine drying-out and enhancing CO2 dissolution significantly. Lastly, the CO2 capturing performance of Ni NPs as a possible additive in an MEA solvent was evaluated to meet CO2 reduction and environmental protection demands. The results were promising: the catalytic potential of Ni NPs accelerates the average CO2 absorption rate by 34% and 54% in the limited mixing and the high mixing conditions, respectively. The results presented in this dissertation could help alleviate global concerns raised by CCS technology and would offer strategies for stable CCS technology with improved efficiency.
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Date Issued
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2019
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PURL
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http://purl.flvc.org/fau/fd/FA00013412
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Subject Headings
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Carbon dioxide capture, Carbon dioxide mitigation, Microfluidics, Carbon capture and storage, Carbon sequestration
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Format
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Document (PDF)
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Title
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Respiration and carbon turnover rates of medusae from the NE Pacific.
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Creator
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Larson, R. J., Harbor Branch Oceanographic Institute
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Date Issued
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1987
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PURL
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http://purl.flvc.org/FCLA/DT/3353790
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Subject Headings
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Medusae, Respiration, Carbon, Carbon cycle (Biogeochemistry)--Pacific Ocean Region
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Format
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Document (PDF)
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Title
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Preliminary study on carbondioxide, temperature and humidity profiles in a manned submersible.
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Creator
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Wang, Tsen C., Lenahan, Robert A., Harbor Branch Oceanographic Institute
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Date Issued
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1982
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PURL
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http://purl.flvc.org/fau/fd/FA00007001
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Subject Headings
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Carbon dioxide, Submersibles, Temperature, Humidity
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Format
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Document (PDF)
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Title
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Analysis of carbon nanotube/epoxy composite in the presence of an interphase layer.
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Creator
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Sabet, Seyed Morteza, Mahfuz, Hassan, Graduate College
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Date Issued
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2013-04-12
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PURL
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http://purl.flvc.org/fcla/dt/3361347
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Subject Headings
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Nanotubes, Carbon, Nanotubes--Analysis
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Format
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Document (PDF)
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Title
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Investigation of Structure-Property Relationship of a High Temperature Polyimide Reinforced with Nanoparticles.
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Creator
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Rowbottom, Colin, Mahfuz, Hassan, Florida Atlantic University, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
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Abstract/Description
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Nano-reinforced polymeric systems have demonstrated a great deal of interest within academia and industry, due to the intrinsic properties of the graphene nanofillers, having excellent mechanical, thermal and electrical properties. The reinforcement of multiwall carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) were introduced into a low cost, non-carcinogenic, high temperature PMR type polyimide resin. The effects of the interfacial interaction and dispersion quality resulted in...
Show moreNano-reinforced polymeric systems have demonstrated a great deal of interest within academia and industry, due to the intrinsic properties of the graphene nanofillers, having excellent mechanical, thermal and electrical properties. The reinforcement of multiwall carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) were introduced into a low cost, non-carcinogenic, high temperature PMR type polyimide resin. The effects of the interfacial interaction and dispersion quality resulted in improvement in the glass transition temperature (Tg), elastic modulus and thermal stability by, 31°C, 63% and 16°C, respectively. In fine, this study presents a simple but effective high temperature polyimide (HTPI) nanocomposites manufacturing procedure and established that nanoparticle reinforcement can be used to improve both thermal and mechanical properties.
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Date Issued
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2018
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PURL
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http://purl.flvc.org/fau/fd/FA00013035
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Subject Headings
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Polyimides, Nanoparticles, Carbon nanotubes, Graphene
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Format
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Document (PDF)
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Title
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Molecular dynamics simulation of single-walled carbon nanotubes.
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Creator
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Cornwell, Charles F., Florida Atlantic University, Wille, Luc T.
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Abstract/Description
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Classical trajectory molecular dynamics methods are used to investigate open ended free standing single wall carbon nanotubes ("SWT"). Total energy calculations performed using classical three-body interatomic potentials with periodic boundary conditions along the tube axis, showed that the minimum strain energy varied as 1/$R\sp2$ relative to an unstrained graphite sheet. We discuss the development of a parallel code to simulate short-ranged empirical potentials such as those of Stillinger...
Show moreClassical trajectory molecular dynamics methods are used to investigate open ended free standing single wall carbon nanotubes ("SWT"). Total energy calculations performed using classical three-body interatomic potentials with periodic boundary conditions along the tube axis, showed that the minimum strain energy varied as 1/$R\sp2$ relative to an unstrained graphite sheet. We discuss the development of a parallel code to simulate short-ranged empirical potentials such as those of Stillinger and Weber, Tersoff, and Tersoff-Brenner. We then use the Tersoff and Tersoff-Brenner potentials to examine SWT and the tube response to axial stretching and compression. Data collected are used to calculate Young's modulus for the tubes and to develop a simple formula that approximates Young's modulus over a range of tube radii. The investigation of the free standing SWT leads to a suggestion for the possible mechanism responsible for holding the tubes open during the growth process.
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Date Issued
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1996
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PURL
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http://purl.flvc.org/fcla/dt/15269
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Subject Headings
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Carbon, Nanostructured materials, Simulation methods
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Format
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Document (PDF)
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Title
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Electrochemical intercalation of lithium-ion into carbon fibers prepared from synthetic cellulose precursor.
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Creator
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Kashauer, Robert Lewis., Florida Atlantic University, Lipka, Stephen M., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
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Abstract/Description
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A number of fibrous carbon materials have been investigated as intercalation host materials. Commercially available rayon fiber (synthetic cellulose) based carbon fibers were synthesized for use as anode material in lithium-ion batteries. The effects of oxidation and carbonization temperature, heating ramp rate, soak time and gaseous atmosphere during thermal treatment on the electrochemical performance of the carbon fibers were studied. Intercalation/deintercalation experiments were...
Show moreA number of fibrous carbon materials have been investigated as intercalation host materials. Commercially available rayon fiber (synthetic cellulose) based carbon fibers were synthesized for use as anode material in lithium-ion batteries. The effects of oxidation and carbonization temperature, heating ramp rate, soak time and gaseous atmosphere during thermal treatment on the electrochemical performance of the carbon fibers were studied. Intercalation/deintercalation experiments were performed to evaluate the electrochemical performance of the carbon fibers. The highest reversible capacity and lowest irreversible capacity loss were obtained for carbon fibers carbonized at 1100C at a ramp rate of 10C/min held at soak times of 1 and 5 hours. Electrolyte containing 1M LiPF6 in 70/30 v/o EC:DMC proved to be most suitable for these carbon fiber materials. The influence of electrolyte composition (solvent and salt) on the reversible and irreversible capacities as well as on the intercalation/deintercalation potential profile were also studied.
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Date Issued
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1997
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PURL
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http://purl.flvc.org/fcla/dt/15452
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Subject Headings
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Carbon fibers, Lithium cells, Electrolytes
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Format
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Document (PDF)
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Title
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Total carbon system automation.
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Creator
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Clark, A. M.
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Date Issued
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1979 - 09 - 06
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PURL
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http://purl.flvc.org/fcla/dt/3358736
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Subject Headings
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Carbon, Carbon--Measurement, Seawater--Analysis, Indian River (Fla. : Lagoon), Carbon dioxide--Measurement
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Format
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Document (PDF)
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Title
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Elemental composition of the coral Pocillopora damicornis exposed to elevated seawater ammonium.
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Creator
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Muller-Parker, Gisèle, Cook, Clayton B., D'Elia, C. F.
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Date Issued
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1994
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PURL
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http://purl.flvc.org/fau/fd/FA00007225
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Subject Headings
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Corals, Zooxanthellales, Ammonium, Seawater, Nitrogen, Phosphorus, Carbon
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Format
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Document (PDF)
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Title
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Strategies for pulsed nutrient supply to Gracilaria cultures in the Florida Keys: interactions between concentration and frequency of nutrient pulses.
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Creator
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Lapointe, Brian E.
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Date Issued
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1985
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PURL
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http://purl.flvc.org/FCLA/DT/3353768
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Subject Headings
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Gracilaria, Cage aquaculture, Growth, Carbon, Nitrogen, Phosphorus
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Format
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Document (PDF)
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Title
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Light quality effects on carbon metabolism and allocation in Gracilaria verrucosa.
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Creator
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Bird, Kimon T., Dawes, Clinton J., Romeo, J. T., Harbor Branch Oceanographic Institute
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Date Issued
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1981
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PURL
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http://purl.flvc.org/FCLA/DT/3176713
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Subject Headings
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Gracilaria verrucosa, Carbon--Metabolism, Red algae
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Format
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Document (PDF)
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Title
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Reduction of chlorinated hydrocarbons with natural sunlight in a platinum‐catalyzed water photolysis system.
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Creator
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Wang, Tsen C., Tan, C. K., Harbor Branch Oceanographic Institute
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Date Issued
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1988
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PURL
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http://purl.flvc.org/FCLA/DT/3332944
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Subject Headings
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Photolysis, Chlorinated hydrocarbons, Chlorohydrocarbons, Trichloroethylene, Carbon tetrachloride
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Format
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Document (PDF)
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Title
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Significance of carbon dioxide and bicarbonate-carbon uptake in marine biomass production.
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Creator
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Ryther, John H., DeBusk, T. A., Harbor Branch Oceanographic Institute
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Date Issued
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1982
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PURL
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http://purl.flvc.org/fau/fd/FA00007054
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Subject Headings
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Biomass, Carbon dioxide, Bicarbonate, Gracilaria, Red algae
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Format
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Document (PDF)
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Title
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Gasometric device for measuring CO2 scrubber performance efficiency.
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Creator
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Wang, Tsen C., Lenahan, Robert A., Harbor Branch Oceanographic Institute
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Date Issued
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1986
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PURL
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http://purl.flvc.org/fau/fd/FA00007491
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Subject Headings
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Submersibles, Scrubber (Chemical technology), Carbon dioxide
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Format
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Document (PDF)
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Title
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Downward export of respiratory carbon and dissolved inorganic nitrogen by diel-migrant zooplankton at JGOFS Bermuda time-series station.
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Creator
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Dam, H. G., Roman, M. R., Youngbluth, Marsh J.
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Date Issued
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1995
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PURL
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http://purl.flvc.org/FCLA/DT/3331897
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Subject Headings
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Zooplankton, Zooplankton--Migration, Carbon, Nitrogen
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Format
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Document (PDF)
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Title
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13C/12C ratios and the trophic importance of algae in Florida Syringodium filiforme seagrass meadows.
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Creator
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Fry, B., Harbor Branch Oceanographic Institute
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Date Issued
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1984
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PURL
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http://purl.flvc.org/FCLA/DT/3176733
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Subject Headings
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Algae, Carbon--Isotopes, Food chains (Ecology)
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Format
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Document (PDF)
Pages