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Liquid Diffusion Model that Accounts for a Variety of Dyeing Parameters [article]

Morimoto Yuki, Masayuki Tanaka, Reiji Tsuruno, Kiyoshi Tomimatsu
2007 Eurographics State of the Art Reports  
Our model also includes a simple dyeing technique that produces dyeing patterns by interrupting the diffusion of the dye in a cloth using a press.  ...  This paper describes a method for simulating and visualizing dyeing based on weave patterns and the physical parameters of the threads and the dye.  ...  Additionally, we considered the porosity, tortuosity, capacity of the yarns to simulate dyeing in a cloth that can account for many of the features of dyeing.  ... 
doi:10.2312/egs.20071040 fatcat:hrkohs2gjra4ximqd7decas57u

Biosorption of Congo Red from aqueous solution by crab shell residue: a comprehensive study

Tamtam Mohan Rao, Vudata Venkata Basava Rao
2016 SpringerPlus  
In 2012, US alone imported 5.4 million pounds in a month. Only 20-30 % of the weight of the crab is processed for human food consumption.  ...  Thermodynamic studies conclude that the process is spontaneous, endothermic and a physical adsorption.  ...  Jawahar Babu of Bapatla Engineering College, for providing necessary facilities for the experimental work. Competing interests The authors declare that they have no competing interests.  ... 
doi:10.1186/s40064-016-2113-9 pmid:27186501 pmcid:PMC4846608 fatcat:a74jpwfytnh5xmwun77u4g5gf4

Light-Induced Ring Pattern in a Dye-Doped Nematic Liquid Crystal

Marcel G. Clerc, Gregorio González-Cortés, Paulina I. Hidalgo, Lucciano A. Letelier, Mauricio J. Morel, Jorge Vergara
2021 Applied Sciences  
Based on a mathematical model that accounts for the coupling between the concentration of the cis-state and the order parameter, we elucidate the emergence of the rings as forming patterns in an inhomogeneous  ...  To use these two coherent beams, we synthesize methylred methyl ester as a dye-dopant, which is photosensitive only to one of the light beams, and a commercial E7 liquid crystal as a matrix.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/app11115285 fatcat:fs4a4bprdzavtfy2xd7barj5ua

Extended stable equilibrium invaded by an unstable state

Camila Castillo-Pinto, Marcel G. Clerc, Gregorio González-Cortés
2019 Scientific Reports  
A photo-isomerization experiment of a dye-dopant nematic liquid crystal, allow us to observe the front propagation from an unstable state.  ...  Here, we show that an unstable state generically can invade a locally stable one in the context of the pattern forming systems.  ...  The parameter ν stands for the diffusion coefficient; when this parameter is negative, it induces an anti-diffusion process.  ... 
doi:10.1038/s41598-019-51064-5 pmid:31641144 pmcid:PMC6805852 fatcat:3guwtuplbnaoxo5o27v5vgbme4

Highly efficient removal of basic blue 41 with nanoporous silica

Mansoureh Zarezadeh-Mehrizi, Alireza Badiei
2014 Water Resources and Industry  
Waste water Ethyl silicate Cationic dye Basic blue 41 a b s t r a c t The adsorption characteristics of basic blue 41 from aqueous solution were investigated using nanoporous silica (NPS).  ...  The kinetic data reveals that the adsorption process follows the linear form of the pseudo-second-order model. The adsorption isotherm was fitted well to the Langmuir data.  ...  Acknowledgment We would like to express our gratitude to the University of Tehran for support of this work.  ... 
doi:10.1016/j.wri.2014.04.002 fatcat:sqqoc3g22zfjzmq24mbsikq6vy

Activated Carbon for Dyes Removal: Modeling and Understanding the Adsorption Process

Y. El maguana, N. Elhadiri, M. Benchanaa, R. Chikri
2020 Journal of Chemistry  
These results demonstrated that the prickly pear seed cake is a suitable precursor for the preparation of appropriate activated carbon for dyes removal from aqueous solution.  ...  Moreover, Dubinin–Radushkevich isotherm reveals that the adsorption of methyl orange onto activated carbon was a physisorption process in nature.  ...  Acknowledgments e authors are grateful to the Center of Analyses and Characterization (CAC) of University Caddy Ayyad, Morocco.  ... 
doi:10.1155/2020/2096834 fatcat:26xqwdadj5ejtc3g2njdwmohia

Spatial mapping of fluorophore quantum yield in diffusive media

Yanyu Zhao, Darren Roblyer
2015 Journal of Biomedical Optics  
A fluorescent sample with known QY is used to account for instrument response. To demonstrate QYI, rhodamine B and SNARF-5 were imaged in liquid phantoms with different background optical properties.  ...  We propose a new imaging method, called quantum yield imaging (QYI), to spatially map the QY of a fluorophore within an optically diffusive media.  ...  Acknowledgments The authors wish to thank Irving Bigio, Amaan Mazhar, David Cuccia, and Bruce Tromberg for their helpful discussions.  ... 
doi:10.1117/1.jbo.20.8.086013 pmid:26308165 fatcat:jutnv52csvbw3asgqhpax4gmba

Characteristics of azo-dye onto surfactant modified chromium contained leather waste

Dunya Edan Al- Mammar
2014 IOSR Journal of Applied Chemistry  
A modified low-cost material , chromium contained leather waste (MO CCLW) has been used for study the adsorption behavior of anionic dye orange ӀӀ dye .  ...  the Langmuir isotherm .The Langmuir isotherm constant (K L ) and the freundlich constant (n) indicated a high affinity of MO CCLW for orange ӀӀ dye .  ...  Orange II azo dye has been chosen as it is inexpensive and widely used for variety of materials of nylon, silk, wool, leather.  ... 
doi:10.9790/5736-07218392 fatcat:rsqgjvuegrejpe752lmyrnzjoq

Kinetics of photoinduced ordering in azo-dye films: Two-state and diffusion models

Alexei D. Kiselev, Vladimir G. Chigrinov, Hoi-Sing Kwok
2009 Physical Review E  
A phenomenological two state model is deduced from the master equation for an ensemble of two-level molecular systems.  ...  Using an alternative approach, we formulate the two-dimensional (2D) diffusion model as the free energy Fokker-Planck equation simplified for the limiting regime of purely in-plane reorientation.  ...  This is the special case corresponding to the well-known rotational diffusion equation that has been widely used to study a large variety of problems based on the rotational diffusion model for the rotational  ... 
doi:10.1103/physreve.80.011706 pmid:19658717 fatcat:iu2vneumtramlk2pvx3f7tm7d4

Dynamics of molecular diffusion of rhodamine 6G in silica nanochannels

Y. Y. Kievsky, B. Carey, S. Naik, N. Mangan, D. ben-Avraham, I. Sokolov
2008 Journal of Chemical Physics  
We describe a method to study diffusion of rhodamine 6G dye in single silica nanochannels using arrays of silica nanochannels.  ...  A 10 8 decrease in the dye diffusion coefficient relative to water was observed.  ...  The existing theoretical models of diffusion, however, are not accurate enough to take into account interaction of a R6G molecule and the silica wall.  ... 
doi:10.1063/1.2908875 pmid:18433183 fatcat:azzwt3lowbeihknmocviq5dpoa

Effect of cholesterol on diffusion in surfactant bilayers

Thorsten Pieper, Svetlana Markova, Masataka Kinjo, Dieter Suter
2007 Journal of Chemical Physics  
We find that a reduction of the diffusion coefficient is already detectable at a molar ratio of 8 mol % cholesterol.  ...  We study this process in a model system consisting of the nonionic surfactant C 12 E 5 and water in the lamellar phase.  ...  PE05567 from the Japan Society for the Promotion of Science.  ... 
doi:10.1063/1.2794345 pmid:17979395 fatcat:jkp24u2ptje5bfspjz64z5xpga

Convective exchange between the nose and the atmosphere

F. R. Haselton, P. G. Sperandio
1988 Journal of applied physiology  
The results of the model experiments indicate that exchange effi-ciency is high in the absence of significant diffusional effects, since the beads and the dye have a coefficient of diffusion at least five  ...  Convective effects predominate in a liquid system, since the coefficient of diffusion of a liquid tracer in the surrounding liquid is nearly 10,000 times less than the coefficient of diffusion of a tracer  ... 
doi:10.1152/jappl.1988.64.6.2575 pmid:3403441 fatcat:cdxfmp3qjnbojbjqirnh222oke

Equilibrium, Kinetics, and Thermodynamics of Remazol Brilliant Blue R Dye Adsorption onto Activated Carbon Prepared from Pinang Frond

Mohd Azhar Ahmad, Safarudin Gazali Herawan, Ahmad Anas Yusof
2014 ISRN Mechanical Engineering  
The mechanism of the adsorption process was found from the intraparticle diffusion model.  ...  The adsorption of remazol brilliant blue R (RBBR) dye on pinang frond based activated carbon (PF-AC) was investigated in a batch process.  ...  Pseudo-first-order and pseudo-second-order kinetic model parameters for the adsorption of RBBR dye on PF-AC.  ... 
doi:10.1155/2014/184265 fatcat:ydoyaur5fbeghg3oe2563m6ddm

Mass Transfer in Bioreactors [chapter]

Ma. del Carmen Chvez, Linda V., Mayra Ruiz, Ma. de la Luz X. Negrete, Oscar Martn, Eleazar M.
2011 Mass Transfer in Multiphase Systems and its Applications  
These values indicate that there is a slight effect of dye diffusion on the reaction rate when RT m is changed.  ...  Figure 4 shows a graphical scheme of the model; here C AL is the liquid concentration of the dye, C AP is the dye concentration in the AC core, and C Ab the biofilm concentration.  ...  This book covers a number of developing topics in mass transfer processes in multiphase systems for a variety of applications.  ... 
doi:10.5772/15876 fatcat:pegyw5dpxjaqhmiciekjqofqba

Industrial Cellolignin Wastes as Adsorbent for Removal of Methylene Blue Dye from Aqueous Solutions

Daniela Suteu, Teodor Malutan
2012 BioResources  
Cellolignin, a by-product from the wood processing industry, was studied as a new, eco-friendly adsorbent for the removal of methylene blue cationic dye from aqueous solutions, using a batch adsorption  ...  Kinetic assessment suggests that the adsorption process followed a pseudosecond order model and the rate-limiting step may be the binding of dye onto the adsorbent surface.  ...  Moreover, the specific advantage of this method is that the adsorbent can be chosen from a large variety of materials.  ... 
doi:10.15376/biores.8.1.427-446 fatcat:edb3l4xeybhubbbfyrhhbolsza
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