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Relevant bibliographies by topics / Gold particle

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Academic literature on the topic 'Gold particle'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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Journal articles on the topic "Gold particle"

1

Doremus, Robert H., and Pratima Rao. "Optical properties of nanosized gold particles." Journal of Materials Research 11, no. 11 (1996): 2834–40. http://dx.doi.org/10.1557/jmr.1996.0358.

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Gold particles smaller than 2 nm in diameter were grown in glass. Their optical absorption spectrum did not show the usual plasma absorption band for gold particles; this band was spread by the small particle size. The absorption spectrum was calculated from the bulk optical properties of gold, modified for the small particle size; there was good agreement between calculated and measured spectra. The smallest particles containing from 20 to 40 gold atoms showed a λ−4 dependence of absorption on wavelength λ. This result implies that the absorption in these particles was entirely from free elec

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Ghadamgahi, Sedigheh. "How Recyclability can Reduce Induction Period of Gold Nanocatalysts." Journal of Nano Research 57 (April 2019): 1–6. http://dx.doi.org/10.4028/www.scientific.net/jnanor.57.1.

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The effect of recyclability on the catalytic activity of supported Au101(PPh3)21Cl5 nanoparticles (1.0 wt% Au101/AC) was investigated for benzyl alcohol oxidation under mild conditions. The influence of recyclability on the catalytic activity of activated Au101/AC nanocatalysts was studied trough a comparison of gold particle diameter and also catalysts conversion between the fresh (as synthesized) and recycled gold catalysts. The monitoring of gold particle diameters by transmission electron microscopy (TEM) showed that the gold particles size gradually increased during the catalytic reaction

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Burgoyne, Thomas, and Clare E. Futter. "Gold Particle Analyser: Detection and quantitative assessment of electron microscopy gold probes." PLOS ONE 18, no. 7 (2023): e0288811. http://dx.doi.org/10.1371/journal.pone.0288811.

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Gold particle probes are an essential electron microscopy tool to examine protein localisation, as well as protein trafficking. They can be introduced into living cells when conjugated to a protein that is endocytosed or to an antibody against a cell surface protein. Alternatively, gold particles can be introduced into fixed cells or tissue when conjugated to antibodies, immunoglobulin binding molecules or chemical probes applied to permeabilised samples or electron microscopy sections. Colloidal gold particles that have not been enlarged through chemical (gold or silver) enhancement are typic

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Khertek, Chayana, and Anatoly Sazonov. "Deformational and metasomatic transformations of detrital gold in the course of placer formation." Ores and metals, no. 4 (January 17, 2024): 74–91. http://dx.doi.org/10.47765/0869-5997-2023-10020.

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The richest gold placers periodically mined since 1838 are known in the north of the Republic of Tyva, within the basin of the Amyl and Sistig-Khem rivers. Ag-Au gold is the most common, and cuprous and mercuric varieties are presented in small quantities. Lode gold occurrences are confined to quartz veins and have no economic value. Detrital gold in the placer deposits has the typical typomorphic features of placer gold: roundness, compositional heterogeneity, the presence of rims and intergranular veinlets of high-fineness gold, and particle deformation structures. We have considered the tra

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Rea, Maria Angelica D., Joël Brugger, Barbara Etschmann, Victor Okrugin, and Jeremiah Shuster. "Gold particles from Kamchatka: A brief look at gold biogeochemical cycling in a distinct environment." Mineralogical Magazine 85, no. 1 (2021): 68–75. http://dx.doi.org/10.1180/mgm.2021.17.

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AbstractKamchatka is a peninsula located on the far eastern side of Russia and is a geologically active region within the Pacific Ring of Fire. Placer gold particles were obtained from a stream located in the Yelizovsky District and were compared to particles from regions at similar latitudes. Russian gold particle surface textures and morphologies were characterised optically and using electron microscopy, and bacteria occurring on the surface of particles were inferred from detected amplicon sequence variants (ASVs). The gold particles contained remarkably variable gold surface textures with

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Hainfeld, James F., Frederic R. Fumya, and Richard D. Powell. "A new 1.4 nm gold-Fab probe." Proceedings, annual meeting, Electron Microscopy Society of America 49 (August 1991): 284–85. http://dx.doi.org/10.1017/s0424820100085721.

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A major advance in high resolution EM immunoprobes has recently been achieved: The smallest gold particles easily seen directly in the TEM have been coupled to Fab fragments thus making them the smallest gold-antibody probe commercially available.The gold particle, NanogoldTM, is 1.4 nm in diameter with a very controlled size range, ± 10% (Fig. 1). This is in sharp contrast to other small gold preparations, such as Auroprobe One (Janssen Life Sciences) which actually ranges from 1-3 nm.The Fab conjugate (Fig. 2) has close to one gold particle per Fab fragment. This again is different from othe

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D'Andrea, Michael, Michele Forte, and Jiang Gu. "A quantitative study of silver enhancement of differently sized gold labeling particles for postembedding indirect immunogold EM." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 3 (1990): 754–55. http://dx.doi.org/10.1017/s0424820100161333.

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The post-embedding indirect immunogold staining method has been widely used in electron microscopy. In this technique, colloidal gold labeling particles are round, electron dense and uniform in size with diameters from 5nm to 40nm. At optimal conditions, the smaller the labeling gold particles, the higher the maximum detecting sensitivity (MDS) for the immunostaining. Janssen Pharmaceutical (Piscataway, NJ), developed 1 nm gold, perhaps the most sensitive gold probe to date, in 1989. Even at the higher electron microscopic magnifications, x100,000 - 200,000, the resolution of the lnm gold part

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Ellis, I. O., J. Bell, and J. D. Bancroft. "An investigation of optimal gold particle size for immunohistological immunogold and immunogold-silver staining to be viewed by polarized incident light (EPI polarization) microscopy." Journal of Histochemistry & Cytochemistry 36, no. 1 (1988): 121–24. http://dx.doi.org/10.1177/36.1.3335767.

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We investigated the optimal gold particle size for use with polarized incident light (epi polarization) microscopy with immunogold immunohistological preparation in both immunogold indirect (IGS) and silver-enhanced immunogold-silver staining (IGSS) techniques. A range of gold particle sizes from 5 nm-40 nm was used along with tissue of known immunoreactivity with a well-characterized primary monoclonal antibody. Checkerboard titrations were carried out for each technique and for each particle size. The preparations were viewed using a standard polarized incident light microscope and assessed

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De Roe, C., P. J. Courtoy, and P. Baudhuin. "A model of protein-colloidal gold interactions." Journal of Histochemistry & Cytochemistry 35, no. 11 (1987): 1191–98. http://dx.doi.org/10.1177/35.11.3655323.

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We prepared homogeneous populations of colloidal gold particles of various sizes. These were analyzed for size distribution and number of particles per unit volume. On exposure to increasing concentrations of insulin, myoglobin, protein A, peroxidase, serum albumin, galactosylated serum albumin, lactoferrin, transferrin, catalase, low-density lipoprotein, ferritin, and polymeric IgA, protein binding was a saturable process. Using serum albumin, we verified that a reversible equilibrium was reached within 15 minutes. Scatchard analysis of the interactions between all of these proteins and the g

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Lea, P., and D. K. Gross. "Effective diameters of protein A-gold and goat anti-rabbit-gold conjugates visualized by field emission scanning electron microscopy." Journal of Histochemistry & Cytochemistry 40, no. 6 (1992): 751–58. http://dx.doi.org/10.1177/40.6.1588022.

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High-voltage (15-30 kV) field emission scanning electron microscopy (FESEM) was used to evaluate the effects of gold particle size and protein concentration on the formation of protein-gold complexes. Six colloidal gold sols were prepared, ranging in diameter from 7.6 to 39.8 nm. The minimal protecting amounts (m.p.a.) of protein A and goat anti-rabbit antibody (GAR) were experimentally determined. Gold particles were conjugated at the m.p.a., one half the m.p.a., and ten times the m.p.a. for both proteins, and protein-gold complexes prepared for FESEM. The smallest colloidal gold particles re

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Dissertations / Theses on the topic "Gold particle"

1

Kelley, John Joseph. "Controlling Gold Nanoparticle Assembly through Particle-Particle and Particle-Surface Interactions." University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1533083850424849.

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Olk, Phillip. "Optical Properties of Individual Nano-Sized Gold Particle Pairs." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1218612352686-00553.

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This thesis examines and exploits the optical properties of pairs of MNPs. Pairs of MNPs offer two further parameters not existent at single MNPs, which both affect the local optical fields in their vicinity: the distance between them, and their relative orientation with respect to the polarisation of the excitation light. These properties are subject of three chapters: One section examines the distance-dependent and orientation-sensitive scattering cross section (SCS) of two equally sized MNPs. Both near- and far-field interactions affect the spectral position and spectral width of the SCS. F

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Auguié, Baptiste. "Optical properties of gold nanostructures." Thesis, University of Exeter, 2009. http://hdl.handle.net/10036/73955.

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The optical properties of gold in the visible are dominated by the response of the free conduction electrons to light. In gold nanostructures, the surface charge density adopts a configuration that is constrained by the shape of the nanoparticles. As a result, the scattering of light by gold nanoparticles exhibits a resonant response characterised by a strong scattering and absorption in a narrow range of frequencies. The spectral range of this \emph{localised surface plasmon resonance} (LSPR) can be tuned by varying the size and shape of the gold nanoparticle --- the nanoparticles act as nano

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Collins, Ian R. "The colloid stability of gold particles dispersed on solid surfaces." Thesis, University of Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292530.

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Eroglu, Esra. "Synthesis And Characterization Of New Conducting Polymer- Nano Particle Composites." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615631/index.pdf.

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In this study, conjugated monomers containing fluorene units<br>2-(9,9-dihexyl-2-(thiophen-2-yl)-9H-fluoren-7-yl)thiophene (TFT) and 5-(9,9-dihexyl-2-(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-9H-fluoren-7-yl)-2,3dihydrothieno[3,4b ][1,4] dioxine (EFE) were synthesized on the basis of donor-acceptor-donor approach and their electrochemical polymerization were achieved via potential cycling. Optical and electrochemical properties of their corresponding polymers, poly(2-(9,9-dihexyl-2-(thiophen-2-yl)-9H-fluoren-7-yl)thiophene) PTFT, and poly(5-(9,9-dihexyl-2-(2,3-dihydrothieno[3,4-b][1,4]dioxin-

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Roßner, Christian. "High-Precision Particle Arrangement in Gold‒Polymer-Nanocomposites using RAFT Polymerization." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://hdl.handle.net/11858/00-1735-0000-002B-7CAD-0.

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Lee, Kate Y. J. "Colloidal gold nanoparticles for cancer therapy: effects of particle size on treatment efficacy, toxicology, and biodistribution." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/43640.

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Gold nanoparticle has emerged as an attractive platform for drug delivery applications by complementing the existing drug delivery carriers. Currently, only a few gold nanoparticle-based anticancer drug delivery systems have been reported, compared to the polymer-based delivery systems. Additionally, there is still a lack of understanding for the behavior and fate of the gold-drug conjugate in the body that further attention is required. The overall goal of this thesis is to investigate the in vivo behavior of colloidal gold nanoparticle and its therapeutic efficacy in an animal model, especia

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Eguchi, Akira, Phat Lu, Youngsik Kim, and Tom D. Milster. "Characterization of multiphoton emission from aggregated gold nano particles." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622538.

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Although gold nanoparticles (GNPs) are promising probes for biological imaging because of their attracting optical properties and bio-friendly nature, properties of the multi-photon (MP) emission from GNP aggregates produced by a short-wave infrared (SWIR) laser have not been examined. In this paper, characterization of MP emission from aggregated 50 nm GNPs excited by a femtosecond (fs) laser at 1560 nm is discussed with respect to aggregate structures. The key technique in this work is single particle spectroscopy. A pattern matching technique is applied to correlate MP emission and SEM imag

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Selmke, Markus. "Photothermal Single Particle Detection in Theory & Experiments." Doctoral thesis, Universitätsbibliothek Leipzig, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-126286.

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The dissertation presents theoretical and experimental studies on the physical origin of the signal in photothermal microscopy of single particles. This noninvasive optical far field microscopy scheme allows the imaging and detection of single absorbing nanoparticles. Based on a heat-induced pertur- bation in the refractive index in the embedding medium of the nanoscopic absorber, a corresponding probe beam modification is measured and quantified. The method is well established and has been applied since its first demonstration in 2002 to the imaging and characterization of various absorbing p

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Maphasa, Retsepile Ephraim. "Investigating the effect of particle size on the antibacterial activity of gold nanoparticles." University of the Western Cape, 2017. http://hdl.handle.net/11394/5899.

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Magister Scientiae - MSc (Biotechnology)<br>The increase of antibiotic- and/or multidrug-resistant bacteria has become a major global challenge. Killing of antibiotic-resistant bacteria requires a high dose of multiple, expensive drugs, which possess unfavourable side effects to the infected individuals. As a result, treatment of antibiotic resistant-bacteria is costly and more time is required to complete treatment. Therefore, novel substitutes are required to combat drug resistant infections while preventing further microbial resistance. Spherical gold Nanoparticles (sAuNPs) prepared using t

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Books on the topic "Gold particle"

1

Zhang, Ping. STM study of gold particles, C@@ clusters, gold films and iron particles. National Library of Canada = Bibliothèque nationale du Canada, 1991.

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Walsh, Daniel E. A study of factors suspected of influencing the settling velocity of fine gold particles. Mineral Industry Research Laboratory, University of Alaska Fairbanks, 1988.

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Watterson, John R. A pyrolysis-gas chromatographic study of organic matter from Snake River flake-type placer gold particles. U.S. Geological Survey, 1995.

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S, Leventhal Joel, and Geological Survey (U.S.), eds. A pyrolysis-gas chromatographic study of organic matter from Snake River flake-type placer gold particles. U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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S, Leventhal Joel, and Geological Survey (U.S.), eds. A pyrolysis-gas chromatographic study of organic matter from Snake River flake-type placer gold particles. U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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S, Leventhal Joel, and Geological Survey (U.S.), eds. A pyrolysis-gas chromatographic study of organic matter from Snake River flake-type placer gold particles. U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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S, Leventhal Joel, and Geological Survey (U.S.), eds. A pyrolysis-gas chromatographic study of organic matter from Snake River flake-type placer gold particles. U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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S, Leventhal Joel, and Geological Survey (U.S.), eds. A pyrolysis-gas chromatographic study of organic matter from Snake River flake-type placer gold particles. U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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S, Leventhal Joel, and Geological Survey (U.S.), eds. A pyrolysis-gas chromatographic study of organic matter from Snake River flake-type placer gold particles. U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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10

Keryou, Kelei Mading. Skeletal reactions of hydrocarbons over supported sol-derived metallic particles of platinum and platinum-gold bimetallics. Brunel University, 1989.

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Book chapters on the topic "Gold particle"

1

Nariyama, N. "Backscattering from Gold Irradiated with 15–40 keV Photons." In Advanced Monte Carlo for Radiation Physics, Particle Transport Simulation and Applications. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-18211-2_14.

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Ruvalcaba, J. L., and G. Demortier. "Non-Destructive Analysis Of American Gold Jewellery Items By PIXE, RBS and PIGE." In Application of Particle and Laser Beams in Materials Technology. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-015-8459-3_31.

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Keighron, Jacqueline D., and Christine D. Keating. "Enzyme–Gold Nanoparticle Bioconjugates: Quantification of Particle Stoichiometry and Enzyme Specific Activity." In Methods in Molecular Biology. Humana Press, 2013. http://dx.doi.org/10.1007/978-1-62703-468-5_13.

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Puech, K., F. Z. Henari, W. Blau, D. J. Cardin, D. Duff, and P. P. Edwards. "Nonlinear Optical Transmission of Nanometric Gold Colloids and Its Dependence on Particle Size." In Physics and Chemistry of Finite Systems: From Clusters to Crystals. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-017-2645-0_133.

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Ishida, Tamao, Ayako Taketoshi, and Masatake Haruta. "Gold Nanoparticles for Oxidation Reactions: Critical Role of Supports and Au Particle Size." In Nanoparticles in Catalysis. Springer International Publishing, 2020. http://dx.doi.org/10.1007/3418_2020_42.

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Raguindin, Ricky Kristan M., Camelle Kaye A. Aleman, Kloudene A. Salazar, Maricar M. Rosete, and Candy C. Mercado. "Influence of Particle Shape on Heat Transfer from Plasmonic Gold Nanoparticles to a Matrix." In Springer Proceedings in Physics. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-3624-2_4.

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Sato, T., T. Noda, S. Manabe, T. Tuboi, S. Fujita, and N. Yamamoto. "Integrity Test of Virus Removal Membrane through Gold Particle Method and Liquid Forward Flow Test Method." In Animal Cell Technology: Basic & Applied Aspects. Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0848-5_79.

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Montiel, Daniel, Emma V. Yates, Li Sun, et al. "Ligand Synthesis and Passivation for Silver and Large Gold Nanoparticles for Single-Particle-Based Sensing and Spectroscopy." In Nanomaterial Interfaces in Biology. Humana Press, 2013. http://dx.doi.org/10.1007/978-1-62703-462-3_18.

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Jiang, Ping, Xin Wang, Lixue Li, Yihui Zheng, Lidan Zhou, and Zhongbao Zhang. "Reactive Power Optimization for Distribution Network Based on Chaos Guide Particle Swarm Optimization Algorithm with Gold Criterion." In Lecture Notes in Electrical Engineering. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-4981-2_31.

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Ebeling, Bastian. "Nanohybrids of Gold Particles." In Springer Theses. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15245-5_8.

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Conference papers on the topic "Gold particle"

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Haris, Muhammad, Klaudijus Midveris, Syeda Ammara Shabbir, et al. "Plasmonic gold nanoparticles reinforced graphene - ZnO tetrapods composite for efficient PEC water splitting." In British and Irish Conference on Optics and Photonics. Optica Publishing Group, 2024. https://doi.org/10.1364/bicop.2024.ps.3.

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The nanocomposite RGO/ZnO-Ts(70%)/RGO/Au exhibited the photocurrent efficiency of 0.035% with maximum current density till 6mACm-2 at low onset potential of 1.30V (Ag/AgCl) by facilitating maximum connectivity of percolation path and particle-particle junction.

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Palekhova, A. V., D. V. Kononov, T. A. Vartanyan, and D. R. Dadadzhanov. "Enhanced Chemiluminescence of Luminol by Silver and Gold Nanoparticles: Investigating the Role of Particle Size, Shape, and Concentration." In 2024 International Conference Laser Optics (ICLO). IEEE, 2024. http://dx.doi.org/10.1109/iclo59702.2024.10624427.

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Ebashi, Yoichi, Hideya Nakamura, and Satoru Watano. "Interaction of Functionalized Gold Nanoparticles with Lipid Bilayer." In 5th Asian Particle Technology Symposium. Research Publishing Services, 2012. http://dx.doi.org/10.3850/978-981-07-2518-1_173.

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Gonsalves, K. E., G. Carlson, X. Chen, J. Kumar, R. Perez, and M. Jose Yacaman. "Surface Functionalized Nanostructured Gold/Polymer Composites." In Organic Thin Films for Photonic Applications. Optica Publishing Group, 1995. http://dx.doi.org/10.1364/otfa.1995.md.13.

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Nanometric gold particles were synthesized by a liquid/liquid phase-transfer reaction. Composites of these particles were prepared by free-radical polymerization of solutions of the particles in methyl methacrylate monomer. Concentrations of 1.0, 0.7, and 0.3 mg/mlwere prepared, with no noticeable agglomeration of particles during processing. PMMA/gold films showed a linear absorption peak at 530 nm, which is characteristic of nanosized gold. High-resolution electron microscopy measurement showed that the particle diameters varied from 5 to 11 nm. Degenerate four-wave mixing experiments on 10-

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Jindal, Shivam, and Shilpi Jindal. "Applications of gold nano particle, quantum dot and magnetic nano particle." In ADVANCEMENTS IN CIVIL ENGINEERING: COSMEC-2021. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0121420.

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Jonsson, Jacob, Juan Sotelo, Gunnar A. Niklasson, Arne Roos, and Bengt Nilsson. "Microscopic spectrophotometry applied to quasifractal gold particle clusters." In International Symposium on Optical Science and Technology, edited by Leonard M. Hanssen. SPIE, 2000. http://dx.doi.org/10.1117/12.403576.

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Bloemer, Mark J., Paul R. Ashley, Joseph W. Haus, and N. Kalyaniwalla. "Nonlinear optical properties of gold composites." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.thj3.

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Degenerate four-wave mixing measurements on gold particles with sizes ranging from 5 to 30 nm are presented. Conjugate reflectivities were found to be independent of particle size in contrast to theoretical predictions based on quantum size effects which predicts χ(3) is proprtional to 1/r3. Time response measurements reveal a fast and a slow component. The fast component was shorter than the pulse duration (30 ps) while the slow component was size dependent. A possible mechanism for the fast response is "Fermi smearing"1 and for the slower response a thermooptic mechanism based on lattice hea

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Kratzer, Veronika, Laura Desiree Geulig, Erin Grace Fitzpatrick, et al. "Spectroscopic real-time temperature diagnostic for laser-heated thin gold foils." In Applying Laser-driven Particle Acceleration III: Uses of Distinctive Energetic Particle and Photon Sources, edited by Paul R. Bolton and Jörg Schreiber. SPIE, 2023. http://dx.doi.org/10.1117/12.2665472.

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Toor, Anju, and Albert P. Pisano. "Gold nanoparticle/PVDF polymer composite with improved particle dispersion." In 2015 IEEE 15th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2015. http://dx.doi.org/10.1109/nano.2015.7388704.

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Floris, Francesco, Margherita Angelini, and Franco Marabelli. "Particle Swarm Optimization Algorithm for Gold Nanohole Array Design." In IOCN 2023. MDPI, 2023. http://dx.doi.org/10.3390/iocn2023-14534.

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Reports on the topic "Gold particle"

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Noel, Erika, Giulia Mattana, and Anthony McGoron. A Comparative Analysis of Nanoparticle Sizing Techniques for Enhanced Drug Delivery Applications. Florida International University, 2025. https://doi.org/10.25148/fiuurj.3.1.5.

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Nanoparticle-based drug delivery systems hold promise for improving therapeutic efficacy and targeting precision. However, a critical challenge in their development is ensuring size stability, as particle size directly influences biodistribution, cellular uptake, and drug release profiles. This study establishes a streamlined methodology to assess nanoparticle size consistency by comparing three widely used characterization techniques: Dynamic Light Scattering (DLS), Transmission Electron Microscopy (TEM), and Nanoparticle Tracking Analysis (NTA). Two types of nanoparticles were analyzed: 100

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Limtrakul, Sunun, and Wiwut Tanthapanichakoon. Modeling and simulation of flows in two-phase fluidized systems. The Thailand Research Fund, 1999. https://doi.org/10.58837/chula.res.1999.57.

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This present work aims to investigate the solids motion and fluid flow in a two phase fluidized bed via a discrete particle modeling and simulation. The motion of individual particle is based on the fluid force acting on the particle and the contact force between particles. The contact force is models by using the same analogy of spring, dash-pot and friction slider. In addition, the mixing and segregation in beds containing two types of particles with different densities and different size are also studies. Moreover, the effects of superficial gas velocity and bad geometry on the solids movem

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Pinet, N., O. H. Ardakani, J. Cesar, D. C. Petts, C. Debuhr, and P J Sack. Exploring the link between organic matter and Carlin-type gold mineralization: new insights from Yukon deposits. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330086.

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The link between organic matter and gold in sediment-hosted Carlin-type deposits is controversial. This study aims to tackle this potential link by documenting the occurrence of organic matter in a single borehole from a Carlin-type gold deposit in Yukon and by considering, in a preliminary way, the spatial and/or temporal relationship between organic matter and gold mineralization. The sedimentary succession hosting the Conrad deposit was relatively rich in organic matter, possibly related to Archea. Despite the high maturation of samples, the total organic carbon (TOC) content of the limesto

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Mueller, C., S. J. Piercey, M. G. Babechuk, and D. Copeland. Stratigraphy and lithogeochemistry of the Goldenville horizon and associated rocks, Baie Verte Peninsula, Newfoundland. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328990.

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The Goldenville horizon in the Baie Verte Peninsula is an important stratigraphic horizon that hosts primary (Cambrian to Ordovician) exhalative magnetite and pyrite and was a chemical trap for younger (Silurian to Devonian) orogenic gold mineralization. The horizon is overlain by basaltic flows and volcaniclastic rocks, is intercalated with variably coloured argillites and cherts, and underlain by mafic volcaniclastic rocks; the entire stratigraphy is cut by younger fine-grained mafic dykes and coarser gabbro. Lithogeochemical signatures of the Goldenville horizon allow it to be divided into

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Bongsebandhu-phubhakdi, Saknan, and Anan Srikiatkhachorn. On-media axon branching and adhesion investigation of neurons as stimulated by modulated potentials on micro-patterned gold substrate. Faculty of Medicine, Chulalongkorn University, 2016. https://doi.org/10.58837/chula.res.2016.22.

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The main focus of this research paper is on-media axon branching and adhesion investigation of neurons as stimulated by modulated potentials on micro-patterned gold substrate. Due to the prolonged and inefficient procedures of nerve repair, it is essential that we effectively incorporate different parameters and techniques as well as investigate cell-cell and cell-substrate interactions to explore new boundaries. This could lead to more operational options for nerve regeneration. Initially, the behavior of cell growth is first observed. 3T3 and Neuro2A cells are grown according to specific pro

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Tibbetts, Caitlin, Dylan Scott, Jameson Shannon, and Jeb Tingle. Sliver Spall Mitigation Field Investigation, Laboratory Study, and Mixture Proportioning Analysis. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/48756.

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A combined field and laboratory study was conducted to identify factors contributing to sliver spall of concrete pavements and recommend avenues for prevention. In this study, spall density maps of eight airfields were created, and cores were taken for petrographic analysis. A companion laboratory study evaluated nondestructive testing equipment for identifying concrete prone to sliver spalling. Concrete mix designs with good and poor performance were analyzed for trends in mixture proportioning and aggregate gradation. Spall density mapping indicated sliver spalling was more likely to occur o

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Mikkelsen, Lene. Good Practices in Marketing for Micro and Small Enterprise Products: Cases from Latin-America. Inter-American Development Bank, 1999. http://dx.doi.org/10.18235/0008889.

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It has been established that access to profitable markets is a key factor which determines the long-term success for all businesses. For small and microenterprises, however, various constraints limit this access, such as inadequate technology, geographic isolation, lack of raw materials and inefficient production. By providing ways to overcome these constraints, marketing service providers play an essential role in developing the businesses of small and micro producers. Based on three case studies of marketing service providers -from Colombia, Nicaragua and El Salvador- dealing with handicraft

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Uche, Chidi, Zita Ekeocha, Stephen Robert Byrn, and Kari L. Clase. Retrospective Study of Inspectors Competency in the Act of Writing GMP Inspection Report. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317445.

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The research was a retrospective study of twenty-five Good Manufacturing Practice (GMP) inspection reports (from March 2017 through to December 2018) of a national medicine regulatory agency, drug Inspectorate, in West Africa, designed to assess the inspectors’ expertise in the act of inspection report writing. The investigation examined a paper-based tool of thirteen pre-registration Inspection reports and twelve GMP reassessment reports written prior and following an intervention program by external GMP trainers to enhance inspectors’ skill in pharmaceutical cGMP inspection. The study made u

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Tan, Peng, and Nicholas Sitar. Parallel Level-Set DEM (LS-DEM) Development and Application to the Study of Deformation and Flow of Granular Media. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2023. http://dx.doi.org/10.55461/kmiz5819.

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We present a systematic investigation of computational approaches to the modeling of granular materials. Granular materials are ubiquitous in everyday life and in a variety of engineering and industrial applications. Despite the apparent simplicity of the laws governing particle-scale interactions, predicting the continuum mechanical response of granular materials still poses extraordinary challenges. This is largely due to the complex history dependence resulting from continuous rearrangement of the microstructure of granular material, as well as the mechanical interlocking due to grain morph

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ตัณฑะพานิชกุล, วิวัฒน์. การศึกษาผลกระทบของปริมาณน้ำในเซลลูโลสไนเตรตต่อคุณสมบัติของน้ำยาทาเล็บ ที่มีดินเหนียวเป็นสารปรับสภาพการไหล : รายงานวิจัยแบบสมบูรณ์. จุฬาลงกรณ์มหาวิทยาลัย, 2004. https://doi.org/10.58837/chula.res.2004.55.

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Cellulose nitrate (CN) is a semi-synthetic polymer rendering outstanding film properties such as good transparency, and water resistance, thus finds its major utilization in coating industry. Raw CN has water and isopropyl alcohol by-product at maximum content of approximately 3 and 30 wt%, respectively. The tolerance water level in the CN powder for a potential application as nail polish is investigated in order to produce good film-forming properties. The effect of adding layered silicate clay particles as thixotropic agent in the nail enamel is also examined. The water content was varied at

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