Дисертації з теми "Compound droplets"
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Black, James Aaron. "Compound droplets for lab-on-a-chip." Diss., Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/54947.
Повний текст джерелаQu, Xiaofeng. "Dynamics of Compound Droplets via 3D Spectral Boundary Elements." Thesis, North Dakota State University, 2013. https://hdl.handle.net/10365/27008.
Повний текст джерелаDepartment of Energy
National Science Foundation
ND EPSCoR
Farhan, Noor M. "Multiphase Droplet Interactions with a Single Fiber." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/5937.
Повний текст джерелаTheberge, Ashleigh Brooks. "Droplet-based microfluidics for chemical synthesis and integrated analysis." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609687.
Повний текст джерелаWang, Miao. "Study of Volatile Organic Compounds (VOC) in the cloudy atmosphere : air/droplet partitioning of VOC." Thesis, Université Clermont Auvergne (2017-2020), 2019. http://www.theses.fr/2019CLFAC080.
Повний текст джерелаVolatile Organic Compounds (VOC), including saturated, unsaturated, and other substituted hydrocarbons, play a major role in atmospheric chemistry. They are primarily emitted by anthropogenic and biogenic sources into the atmosphere; they are also transformed in situ by chemical reactions, and more specifically, by photo-oxidation leading to the formation of ozone (O3) and Secondary Organic Aerosol (SOA). By altering the organic fraction of aerosol particles, VOC modify the Earth’s radiative balance through a direct effect (absorption and scattering of solar radiation) or through indirect effect by altering cloud microphysical properties. They also present a direct effect on human health and on the environment.During their atmospheric transport, VOC and their oxidation products, Oxygenated Volatile Organic Compounds (OVOC), may partition between the gaseous and aqueous phases depending on their solubility. Clouds have a significant effect on tropospheric chemistry by redistributing trace constituents between phases and by providing liquid water in which aqueous phase chemistry can take place. Indeed, during the cloud lifetime, chemical compounds and particularly VOC are efficiently transformed since clouds favor the development of complex “multiphase chemistry”. The latter presents several particularities. First, photochemical processes inside the droplets are important in the transformation of chemical compounds. Second, aqueous chemical reactions are efficient and can be faster than the equivalent reactions in the gas phase. This can be related to the presence of strong oxidants such as hydrogen peroxide H2O2 or Transition Metal Ions (TMI), which participate in the formation of radicals such as hydroxyl radicals (HO•) that favor oxidation processes. Furthermore, the presence of viable microorganisms has been highlighted and shown to participate in transformations of the chemical species. Finally, these transformations in clouds are also strongly perturbed by microphysical processes that control formation, lifetime and dissipation of clouds. These processes will redistribute the chemical species between the different reservoirs (cloud water, rain, particle phase, gaseous phase, and solid ice phase). In this frame, the transformation of VOC in the cloud medium can lead to the production of secondary compounds contributing to SOA formation, reported as “cloud aqSOA”. This secondary organic aerosol mass produced during the cloud lifetime could explain in part the ubiquity of small dicarboxylic and keto acids and high molecular-weight compounds measured in aerosol particles, fog water, cloud water, or rainwater at many locations, as they have neither substantial direct emission sources nor any identified important source in the gas phase. This aqSOA mass stays in the particle phase after cloud evaporation implying a modification of the (micro)physical and chemical properties of aerosol particles (particle size, chemical composition, morphology). This leads to modifications of their impacts on consecutive cloud or fog cycles (aerosol indirect effects) and of their interactions with incoming radiation by scattering/absorbing (aerosol direct effect). (...)
Gidda, Satinder K., Samantha C. Watt, Jillian Collins-Silva, Aruna Kilaru, Vincent Arondel, Olga Yurchenko, Patrick J. Horn, et al. "Lipid Droplet-Associated Proteins (ldaps) Are Involved in the Compartmentalization of Lipophilic Compounds in Plant Cells." Digital Commons @ East Tennessee State University, 2013. https://doi.org/10.4161/psb.27141.
Повний текст джерелаAsa-Awuku, Akua Asabea. "Characterizing water-soluble organic aerosol and their effects on cloud droplet formation: Interactions of carbonaceous matter with water vapor." Diss., Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22658.
Повний текст джерелаGustavsson, Joel. "Reactions in the Lower Part of the Blast Furnace with Focus on Silicon." Doctoral thesis, Stockholm, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-59.
Повний текст джерелаIyer, Chitra C. "The Role of Muscle and Nerve in Spinal Muscular Atrophy." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1451568269.
Повний текст джерелаChen, Cheng-Wen, and 陳正文. "Heating and Micro-Explosion of Compound Droplets." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/99663209639170532683.
Повний текст джерела國立成功大學
機械工程學系碩博士班
93
A compound drop, composed of a fuel shell and a water core, was suspended and heated to micro-explosion. Three ambient temperatures, namely, 300 oC, 400 oC, and 500 oC and two fuels, namely diesel and n-hexadecane, were tested. The heating process was recorded by a high-speed video system, and the time at temperature of the micro-explosion were measured. The experimental results on compound drops were also compared with the micro-explosion of a heated emulsified W/O diesel-water drop. The micro-explosion of a heated compound drop was classified as either a indirect micro-explosion, if there were quite a few bubbles generated at the shell-core interface before the explosion, or a direct micro-explosion, if few or no bubble could be seen before the explosion. At an ambient temperature of 400 oC or 500 oC, the micro-explosion time was observed to increase with the micro-explosion temperature; but this trend was not as obvious at 300 oC ambient temperature. The intensity of the micro-explosion rose as the micro-explosion time lengthened, because the accumulation of thermal energy within the over-saturated water core drop grew to a higher extent. However, the size of the core water drop was not seen to influence either the micro-explosion time or micro-explosion temperature. Compared with pure n-hexadecane and pure water, the impurities or microscopic air bubbles in diesel and dyed water enhanced nonhomogenous nucleation and thus more steam bubbles were produced before micro-explosion. Furthermore, contrary to the intense micro-explosion of a compound drop, a heated emulsified diesel-water drop generally expanded, and followed by squirting of steam to relieve the pressure within the expanded drop. The distributed microscopic water drops in an emulsified drop acted as nonhomogeneous nucleation sites and made an overall micro-explosion improbable.
Naidu, Ponnana Deekshith. "Classical Approach to Understanding the Impact Dynamics of Hollow Droplets." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/5914.
Повний текст джерелаLo, Jin-Hsiang Andy, and 羅金翔. "Dissolution of Hydrophobic Organic compounds in Fog Droplets." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/67260924775299094885.
Повний текст джерела國立臺灣大學
環境工程研究所
84
In this study, effusion process and solubilization process were conducted to investigate the enriched solubility of n-octane, a surrogate of the hydrophobic organic compounds in atmospheric fog. In effusion process, we presented a dynamically corrected double-layer diffusion model with a new parameter, the effusion factor (.alpha.) to quantify the change of the effusion rate across the air/fog interface. The .alpha. values were in the range of 0.798 to 0.421 for the effect of SDS. Thus, SDS could decrease the mass transfer of n-octane effusing from the fog droplet by about 20 to 60%. However, the .alpha. values varied from 1.17 to 1.57 and 1.42 to 4.23 for the effects of sulfuric acid and NaCl, respectively. Therefore, the ionic strength contributed by sulfuric acid and NaCl could enhance the effusion rate of n-octane by about 17 to 57% for the effect of sulfuric acid and 42 to 323% for the effect of NaCl. NaCl resulted in stronger effusion rate of n-octane from the fog droplets than sulfuric did because of the stronger ionic hydration provided by NaCl. As for solubilization process, the surfactant film on the fog droplets was identified to elevate the solubility of n-octane. The enrichment factor (EF) of n- octane in the fog droplets (diameter: 35 to 75 .mu.m) were between 27.2 to 1.87, depending on the SDS concentration (0.00285M to 0.0000515M). In addition, the larger fog droplets provided n-octane with higher EF value than the smaller fog droplets while below the specific SDS concentration, 0.000103M, The enrichment model was used to describe the micro-states of the n-octane molecules partitioning in the SDS film at the air/ fog interface and the SDS monomers inside the fog water. Above enriching effect could be easily expounded and discussed by use of this model.
Shantz, Nicole C. "The effect of organic compounds on the growth rate of cloud droplets /." 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:NR19810.
Повний текст джерелаTypescript. Includes bibliographical references (leaves 188-201). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:NR19810
Wu, Chih Cheng, and 吳致呈. "Effect of Non-ionic Surface Active Substance on the Effusion of Hydrophobic Organic Compounds from Droplets." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/66435449423845464989.
Повний текст джерела國立臺灣大學
環境工程學研究所
86
ABSTRACT Non-ionic surfactants , Tween 20 , Tween 60 and Tween 80 were used to investigate the effect of non-ionic surface active substance on the effusion of hydrophobic organic compounds from fog droplet . N-decane was chosen as a surrogate of hydrophobic organic compounds (HOCs) . N-decane in aqueous samples was by SPME(solid phase microextration) and relative standard deviation of analysis (RSD%) are between 2.2%~7.5% . The collection bottle was ice bathed to prevent the vaporization of n-decane . Double layer d The results show that Tween 20 , Tween 60 and Tween 80 can decrease the mass transfer of n-decane from 107.8μm droplet to gas phase . At Tween 20 concentration 1.0~12.0×10-2g/L , theα values are decreased 11.9~55.2% . At Tween 60 concentration 1.0~9.7×10-2g/L , the reduction percentage of α values are between 1.8~58.1% . At Tween 80 concentration 5×10-3~12.0×10-2 g/L , the reduction percentage of α values are between 6.2~65.3% . The effect of non-ionic surfactants on effusion can categorized into two Below the concentration of 1.0×10-3M NaCl , salt effect can be ignored whether Tween 20 concentration is below the cmc or above . But , at high concentration of NaCl(1.0×10-2M) , salt effect reduce n-decane effusion (α reduction by 43.4%) when Tween 20 concentration is below the cmc and enhance the effusion (α increase by 48.6%) when Tween 20 concentration is above cmc . Low pH can enhance n-decane effusion whether Tween 20 concentration is below the cmc or not .
(8099576), Sang Kyu Kim. "Transient Dynamics of Compound Drops in Shear and Pressure Driven Flow." Thesis, 2019.
Знайти повний текст джерелаFirstly, we look at non-concentric compound drops that are subject to simple shear flows. The eccentricity in the inner drop is either within the place of shear, normal to the plane of shear, or mixed. We show unreported motions that persist throughout time regardless of the initial eccentricity, given that the deformations of the inner and outer drops are small. Understanding the temporal dynamics of compound drops within the simple shear flow, one of the simplest background flows that may be imposed, allows us to probe at the dynamics of more complicated background flows.
Secondly, we look at the lateral migration of compound drops in a Poiseuille flow. Depending on the initial condition, we show that there are multiple equilibria. We also show that the majority of initial configurations results in the compound drop with symmetry about the short wall direction. We then show the time it takes for the interfaces to merge if a given initial configuration does not reach the aforementioned symmetry.
Thirdly, while the different equilibria of compound drops offer some positional differences at different radii ratio, we show that the lift force profiles at non-equilibrium locations offer distinctly different results for compound drops with different radii ratio. We then look at how this effect is greater than changes that arise due to viscosity ratio changes, and offer insights on what may create such a change in the lift force profile.
Matta, Lara Michel. "The potential role of the multivalent ionic compound PolyP in the assembly of the liquid nature in the cell." Thèse, 2016. http://hdl.handle.net/1866/18665.
Повний текст джерелаPrion-like proteins containing Low Complexity Sequences (LCSs) have the propensity to aggregate and form membrane-less compartments in the cell. These proteins form droplets that have liquid features such as wetting, dripping and fusion. In this study, we demonstrated that the prion domain-containing protein Hrp1 forms droplets of different sizes in the presence of negatively charged polymers via liquid-liquid phase separation, whereas under the same conditions, the prion-like domain PolyQ/N of Hrp1 forms a gel-like material. Based on these findings, we hypothesize that droplets in vivo could be modulated by negatively charged polyelectrolytes found in the cell such as DNA, RNA and polyphosphate (PolyP). My goal was to examine the role of the polyanionic nature of PolyP on the assembly of P-bodies using Saccharomyces cerevisiae as a cellular model and fluorescence microscopy. We chose to study processing (P)- bodies, based on previous findings that these cellular subcompartments are formed by liquid-liquid phase separation of component proteins in the cytoplasm. We found that depleting phosphate from the media and deleting vtc4 gene, which is responsible for PolyP synthesis, did not have any effect on P-body formation. In addition, we demonstrated that PolyP and the protein Edc3, a core component of P-bodies, do not colocalize. Our data suggest that PolyP does not affect P-body formation. However, further and complementary studies have to be performed to confirm that PolyP have no effects on other membrane-less organelles.