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Journal articles on the topic 'Breakthrough curve analysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Knox, James C., Armin D. Ebner, M. Douglas LeVan, Robert F. Coker, and James A. Ritter. "Limitations of Breakthrough Curve Analysis in Fixed-Bed Adsorption." Industrial & Engineering Chemistry Research 55, no. 16 (2016): 4734–48. http://dx.doi.org/10.1021/acs.iecr.6b00516.

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2

Sharp, R. R., A. B. Cunningham, J. Komlos, and J. Billmayer. "Observation of thick biofilm accumulation and structure in porous media and corresponding hydrodynamic and mass transfer effects." Water Science and Technology 39, no. 7 (1999): 195–201. http://dx.doi.org/10.2166/wst.1999.0359.

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A series of flat plate, porous media reactor studies was performed to characterize the development and structure of thick biofilms in porous media and the subsequent effects on porous media hydrodynamics and mass transport variables including average pore velocity, hydrodynamic dispersivity, and (dye tracer) breakthrough curve features. Biofilms composed of either a mucoid strain of Pseudomonas aeruginosa or a non-mucoid strain of Ps. aeruginosa were established in the reactors over a 2-3 week period. Analysis of porous media biofilms was performed using a combination of image analysis, photog

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3

Marciniak, Marek, Monika Okońska, and Mariusz Kaczmarek. "Preselection of a sorption model based on a column test: the algorithm and an example of its application." Hydrogeology Journal 29, no. 4 (2021): 1551–67. http://dx.doi.org/10.1007/s10040-021-02338-8.

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AbstractIn order to describe the contamination of saturated porous media, it is necessary to find an appropriate mathematical model that includes processes occurring in aquifers, such as advection, dispersion, diffusion, and various kinds of sorption. The identification of parameters of those processes is possible through laboratory column experiments, which result in records of breakthrough curves for a conservative tracer and a reactive tracer. An algorithm leading to the preliminary selection of the mathematical model that best describes transport processes of the reactive tracer in the exp

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Kotoh, K., M. Tanaka, T. Sakamoto, et al. "Breakthrough Curve Analysis of Pressure Swing Adsorption for Hydrogen Isotope Separation." Fusion Science and Technology 54, no. 2 (2008): 415–18. http://dx.doi.org/10.13182/fst08-a1843.

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5

Rajeshkannan, R., M. Rajasimman, and N. Rajamohan. "Packed bed column studies for the removal of dyes using novel sorbent." Chemical Industry and Chemical Engineering Quarterly 19, no. 4 (2013): 461–70. http://dx.doi.org/10.2298/ciceq120407081r.

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A continuous fixed bed study was carried out by using tamarind seed as a sorbent for the removal of malachite green (MG) and acid blue 9(AB9) from aqueous solution. The effect of factors, such as flow rate and bed depth was studied. Data confirmed that the breakthrough curves were dependent on flow rate and bed depth. Thomas, Adams-Bohart, and Yoon-Nelson models were applied to experimental data to predict the breakthrough curves using non-linear regression and to determine the characteristic parameters of the packed bed column. Bed depth/service time analysis (BDST) model was used to express

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Nienow, Peter W., Martin Sharp, and Ian С. Willis. "Sampling-rate effects on the properties of dye breakthrough curves from glaciers." Journal of Glaciology 42, no. 140 (1996): 184–89. http://dx.doi.org/10.1017/s0022143000030641.

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AbstractDye-tracer techniques are widely used in infer the character of subglacial drainage systems. Quantitative analysis of dye breakthrough curves focuses on the determination of the water through flow velocity(u),the dispersion coefficient(D)and the dispersivity parameter(d = D/u). Together, these parameters describe the rate of passage of tracer through the drainage system and the extent to which the dye cloud becomes spread out during passage. They have been used to infer the nature of flow conditions within a drainage system and temporal changes in system morphology. Estimates of all th

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7

Nienow, Peter W., Martin Sharp, and Ian С. Willis. "Sampling-rate effects on the properties of dye breakthrough curves from glaciers." Journal of Glaciology 42, no. 140 (1996): 184–89. http://dx.doi.org/10.3189/s0022143000030641.

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AbstractDye-tracer techniques are widely used in infer the character of subglacial drainage systems. Quantitative analysis of dye breakthrough curves focuses on the determination of the water through flow velocity (u), the dispersion coefficient (D) and the dispersivity parameter (d = D/u). Together, these parameters describe the rate of passage of tracer through the drainage system and the extent to which the dye cloud becomes spread out during passage. They have been used to infer the nature of flow conditions within a drainage system and temporal changes in system morphology. Estimates of a

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8

Zhong, Qian-Qian, Xing Xu, Li Shen, Ya-Jing Han, and Yu-Cui Hao. "Breakthrough Curve Analysis of Enteromorpha prolifera Packed Fixed-Bed Column for the Biosorption." Environmental Engineering Science 35, no. 8 (2018): 864–74. http://dx.doi.org/10.1089/ees.2017.0473.

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9

Kwon, Siyoon, Hyoseob Noh, Il Won Seo, Sung Hyun Jung, and Donghae Baek. "Identification Framework of Contaminant Spill in Rivers Using Machine Learning with Breakthrough Curve Analysis." International Journal of Environmental Research and Public Health 18, no. 3 (2021): 1023. http://dx.doi.org/10.3390/ijerph18031023.

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To minimize the damage from contaminant accidents in rivers, early identification of the contaminant source is crucial. Thus, in this study, a framework combining Machine Learning (ML) and the Transient Storage zone Model (TSM) was developed to predict the spill location and mass of a contaminant source. The TSM model was employed to simulate non-Fickian Breakthrough Curves (BTCs), which entails relevant information of the contaminant source. Then, the ML models were used to identify the BTC features, characterized by 21 variables, to predict the spill location and mass. The proposed framework

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10

Mekonnen, Dereje Tadesse, Esayas Alemayehu, and Bernd Lennartz. "Fixed-Bed Column Technique for the Removal of Phosphate from Water Using Leftover Coal." Materials 14, no. 19 (2021): 5466. http://dx.doi.org/10.3390/ma14195466.

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The excessive discharge of phosphate from anthropogenic activities is a primary cause for the eutrophication of aquatic habitats. Several methodologies have been tested for the removal of phosphate from aqueous solutions, and adsorption in a flow-through reactor is an effective mechanism to reduce the nutrient loading of water. This research aimed to investigate the adsorption potential of leftover coal material to remove phosphate from a solution by using continuous flow fixed-bed column, and analyzes the obtained breakthrough curves. A series of column tests were performed to determine the p

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11

Kamble, Manisha G., Milind D. Nagrale, Ankit A. Kamdi, Sunil K. Deokar, and Sachin A. Mandavgane. "Packed column dynamic studies and breakthrough curve analysis for adsorption of paraquat herbicide onto agroindustrial ashes." DESALINATION AND WATER TREATMENT 83 (2017): 86–97. http://dx.doi.org/10.5004/dwt.2017.21043.

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12

Samarghandi, Mohammad R., Mahdi Hadi, and Gordon McKay. "Breakthrough Curve Analysis for Fixed-Bed Adsorption of Azo Dyes Using Novel Pine Cone—Derived Active Carbon." Adsorption Science & Technology 32, no. 10 (2014): 791–806. http://dx.doi.org/10.1260/0263-6174.32.10.791.

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13

Prattes, Jürgen, Wiebke Duettmann, and Martin Hoenigl. "Posaconazole Plasma Concentrations on Days Three to Five Predict Steady-State Levels." Antimicrobial Agents and Chemotherapy 60, no. 9 (2016): 5595–99. http://dx.doi.org/10.1128/aac.00389-16.

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ABSTRACTLow posaconazole plasma concentrations (PPCs) have been associated with breakthrough invasive fungal infections. We assessed the correlation between pre-steady-state PPCs (obtained between days 3 and 5) and PPCs obtained during steady state in 48 patients with underlying hematological malignancies receiving posaconazole oral-solution prophylaxis. Pre-steady-state PPCs correlated significantly with PPCs obtained at steady state (Spearmanr= 0.754;P< 0.001). Receiver operating characteristic (ROC) curve analysis of pre-steady-state PPCs revealed an area under the curve (AUC) of 0.884 (

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14

Motshekga, Sarah C., and Suprakas Sinha Ray. "Highly efficient inactivation of bacteria found in drinking water using chitosan-bentonite composites: Modelling and breakthrough curve analysis." Water Research 111 (March 2017): 213–23. http://dx.doi.org/10.1016/j.watres.2017.01.003.

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15

Jacobsen, Ole H., Feike J. Leij, and Martinus Th van Genuchten. "Parameter Determination for Chloride and Tritium Transport in Undisturbed Lysimeters during Steady Flow." Hydrology Research 23, no. 2 (1992): 89–104. http://dx.doi.org/10.2166/nh.1992.0007.

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Breakthrough curves of Cl and 3H2O were obtained during steady unsaturated flow in five lysimeters containing an undisturbed coarse sand (Orthic Haplohumod). The experimental data were analyzed in terms of the classical two-parameter convection-dispersion equation and a four-parameter two-region type physical nonequilibrium solute transport model. Model parameters were obtained by both curve fitting and time moment analysis. The four-parameter model provided a much better fit to the data for three soil columns, but performed only slightly better for the two remaining columns. The retardation f

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16

Chu, Khim Hoong. "Breakthrough curve analysis by simplistic models of fixed bed adsorption: In defense of the century-old Bohart-Adams model." Chemical Engineering Journal 380 (January 2020): 122513. http://dx.doi.org/10.1016/j.cej.2019.122513.

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17

Wang, Wei, Xiang An Yue, Ren Bao Zhao, and Hui Yang. "Experimental and Theoretical Studies on Effects of Heterogeneity on Channeling in Waterflooding." Advanced Materials Research 518-523 (May 2012): 4084–87. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.4084.

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Water channeling is easy to occur during the process of water flooding in heterogeneous reservoirs. It leads to injected water noneffective cycling, the recovery decreasing and the development cost rising. By means of physical experiments and theoretical analysis, characteristics of water channeling are studied in different heterogeneous reservoirs. The result shows that when permeability contrast is lesser than 5.88, the development performance of reservoirs is similar to homogeneous reservoirs and water cut rises slowly after water breakthrough. If permeability contrast is higher than 5.88,

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18

Bang, Yeong Hak, Yoon Ho Choi, Mincheol Park, Geon Hee Lee, Soo-yong Shin, and Seok Jin Kim. "Prediction of the breakthrough cancer pain using deep learning model." Journal of Clinical Oncology 39, no. 15_suppl (2021): e24085-e24085. http://dx.doi.org/10.1200/jco.2021.39.15_suppl.e24085.

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e24085 Background: Breakthrough cancer pain (BTcP), a transitory flare of pain that occurs on a background of relatively well-controlled baseline pain, is a challenging clinical problem in managing cancer pain. We hypothesized that the BTcP could be predictable according to the patients’ previous observed patterns. In this study, we report on the development of a deep learning model that predicts hourly individual-level breakthrough pain for patients with cancer. Methods: We defined the BTcP as the pain with numerical rating scale (NRS) score 4 or above and developed models predicting the onse

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19

Chowdhury, Z. Z., S. M. Zain, A. K. Rashid, R. F. Rafique, and K. Khalid. "Breakthrough Curve Analysis for Column Dynamics Sorption of Mn(II) Ions from Wastewater by UsingMangostana garciniaPeel-Based Granular-Activated Carbon." Journal of Chemistry 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/959761.

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The potential of granular-activated carbon (GAC) derived from agrowaste of Mangostene (Mangostana garcinia) fruit peel was investigated in batch and fixed bed system as a replacement of current expensive methods for treating wastewater contaminated by manganese, Mn(II) cations. Batch equilibrium data was analyzed by Langmuir, Freundlich, and Temkin isotherm models at different temperatures. The effect of inlet metal ion concentration (50 mg/L, 70 mg/L, and 100 mg/L), feed flow rate (1 mL/min and 3 mL/min), and activated carbon bed height (4.5 cm and 3 cm) on the breakthrough characteristics of

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20

Guo, Leilei, Lin Qian, Mo Xu, et al. "Effect of the loam inter-layer on the migration and breakthrough of benzene under constant flow in the unsaturated zone: column experiments." Water Science and Technology 79, no. 2 (2019): 207–17. http://dx.doi.org/10.2166/wst.2019.003.

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Abstract The reliable prediction of transport and attenuation of dissolved-phase contamination in the unsaturated zone is a complex and multi-process problem. Based on the adsorption properties of soil samples to solutes, the soil column test and laboratory analysis were carried out in this study. The effects of the loam inter-layer on the migration and breakthrough of the characteristic pollutant benzene and non-absorbent Br− were studied. The results showed that the relatively high clay content of the inter-layer significantly changed the BTC (breakthrough curve). It not only delayed the mig

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21

Nakayama, Chieko, and Yoshinori Tanaka. "Adsorption of nitrate as a groundwater pollutant by soil particles." Journal of Nepal Geological Society 34 (October 9, 2006): 141–46. http://dx.doi.org/10.3126/jngs.v34i0.31890.

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This study discusses nitrogen adsorption in several soil samples of the Kanto loam collected from two locations in the Kanto plain. Their chemical properties were assessed on each of the soil samples as well as on pure allophane clay by instrumental analysis using batch and soil column tests. Nitrogen-nitrate adsorption by soil samples was determined by a 10-hour batch test using a nitric acid solution of 0.14 mmol. A saturation column test was conducted to obtain a breakthrough curve and calculate the coefficients of dispersion and retardation. The extent of nitrate adsorption in soil s

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22

Hanami, Zarah Arwieny, and Puji Lestari. "Characterization and Application of Mangosteen Peel Activated Carbon for Ammonia Gas Removal." Environment and Natural Resources Journal 19, no. 4 (2021): 320–29. http://dx.doi.org/10.32526/ennrj/19/2020298.

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Mangosteen peel can be used as an activated carbon precursor because of its high lignin content and hardness. In this study, mangosteen peel activated carbon (MP-AC) was prepared by a physical activation method using CO2 at 850°C. The Brunauer-Emmett-Teller (BET) analysis was used to assess the optimal activation time to identify the largest surface area. The properties of MP-AC were characterized by the SEM-EDS and FTIR analyses. The results showed that MP-AC obtained from the 120-minute activation time had the largest BET specific surface area of 588.41 m2/g and was selected as an adsorbent

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23

Dolatyari, Leila, Mohammad Reza Yaftian, and Sadegh Rostamnia. "Fixed-bed column dynamic studies and breakthrough curve analysis of Eu(III) ion adsorption onto chemically modified SBA-15 silica materials." Separation Science and Technology 52, no. 3 (2016): 393–403. http://dx.doi.org/10.1080/01496395.2016.1250781.

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24

Hu, Qili, and Zhenya Zhang. "Comment on “Breakthrough curve analysis by simplistic models of fixed bed adsorption: In defense of the century-old Bohart–Adams model”." Chemical Engineering Journal 394 (August 2020): 124511. http://dx.doi.org/10.1016/j.cej.2020.124511.

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25

Bahrun, Mohd Hardyianto Vai, Awang Bono, Nur Kamaliyah Dzilrazman, and Zykamilia Kamin. "Recovery of Minor Palm Oil Compounds Using Packed Bed Adsorption Column." Jurnal Bahan Alam Terbarukan 9, no. 1 (2020): 21–29. http://dx.doi.org/10.15294/jbat.v9i1.23461.

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Carotene and tocopherol are valuable products that exist as minor compounds in palm oil and mostly extracted out during many stages of palm oil processing. Hence, most of it ended up in wastewater or palm oil mill effluent (POME). Fortunately, adsorption is potentially one of the most efficient method as compared to the others. In fact, it is widely studied in laboratory scale, in order to obtain equilibrium data for the steady state system. However, industrial practices are mostly operated in unsteady state in a continuous manner. Consequently, this study is executed to design a recovery proc

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26

Zhang, Jihuan. "Environmental Kuznets Curve Hypothesis on CO2 Emissions: Evidence for China." Journal of Risk and Financial Management 14, no. 3 (2021): 93. http://dx.doi.org/10.3390/jrfm14030093.

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China is the largest CO2 emitter in the world, and it shared 28% of the global CO2 emissions in 2017. According to the Paris Agreement, it is estimated that China’s CO2 emissions will reach its peak by 2030. However, whether or not the CO2 emissions in China will rise again from its peak is still unknown. If the emission level continues to increase, the Chinese policymakers might have to introduce a severe CO2 reduction policy. The aim of this paper is to conduct an empirical analysis on the long-standing relationship between CO2 emissions and income while controlling energy consumption, trade

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27

Bodin, Jacques. "MFIT 1.0.0: Multi-Flow Inversion of Tracer breakthrough curves in fractured and karst aquifers." Geoscientific Model Development 13, no. 6 (2020): 2905–24. http://dx.doi.org/10.5194/gmd-13-2905-2020.

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Abstract. More than half of the Earth's population depends largely or entirely on fractured or karst aquifers for their drinking water supply. Both the characterization and modeling of these groundwater reservoirs are therefore of worldwide concern. Artificial tracer testing is a widely used method for the characterization of solute (including contaminant) transport in groundwater. Tracer experiments consist of a two-step procedure: (1) introducing a conservative tracer-labeled solution into an aquifer, usually through a sinkhole or a well, and (2) measuring the concentration breakthrough curv

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28

Li, Kenli, Shuting Zou, and Jin Xv. "Fast Parallel Molecular Algorithms for DNA-Based Computation: Solving the Elliptic Curve Discrete Logarithm Problem overGF(2n)." Journal of Biomedicine and Biotechnology 2008 (2008): 1–10. http://dx.doi.org/10.1155/2008/518093.

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Elliptic curve cryptographic algorithms convert input data to unrecognizable encryption and the unrecognizable data back again into its original decrypted form. The security of this form of encryption hinges on the enormous difficulty that is required to solve the elliptic curve discrete logarithm problem (ECDLP), especially overGF(2n),n∈Z+. This paper describes an effective method to find solutions to the ECDLP by means of a molecular computer. We propose that this research accomplishment would represent a breakthrough for applied biological computation and this paper demonstrates that in pri

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29

Wen, T., X. Zhang, H. Q. Zhang, and J. D. Liu. "Ammonium removal from aqueous solutions by zeolite adsorption together with chemical precipitation." Water Science and Technology 61, no. 8 (2010): 1941–47. http://dx.doi.org/10.2166/wst.2010.145.

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The aim of this study was to remove ammonium from aqueous solution and recycle ammonium. Ammonium removal from aqueous solution by natural and pretreated zeolites, breakthrough curve, chemical regeneration of pretreated zeolite, ammonium removal from regeneration solution by chemical precipitation and NH4+ adsorption isotherms were investigated by conducting a series of batch and continuous experiments in this study. Morphologies and structures of zeolites were analyzed by Surface Area and Pore Size analysis, Scanning Electron Microscopy (SEM) and Fourier Transform Infrared (FTIR) spectroscopy

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30

Aziz, Abdul Shukor Abdul, Latifah Abd Manaf, Hasfalina Che Man, and Nadavala Siva Kumar. "Column dynamic studies and breakthrough curve analysis for Cd(II) and Cu(II) ions adsorption onto palm oil boiler mill fly ash (POFA)." Environmental Science and Pollution Research 21, no. 13 (2014): 7996–8005. http://dx.doi.org/10.1007/s11356-014-2739-5.

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31

Chu, Khim Hoong. "Rebuttal to comment on “Breakthrough curve analysis by simplistic models of fixed bed adsorption: in defense of the century-old Bohart-Adams model”." Chemical Engineering Journal 398 (October 2020): 125546. http://dx.doi.org/10.1016/j.cej.2020.125546.

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32

Recepoğlu, Yaşar K., Nalan Kabay, Idil Yılmaz Ipek, et al. "Packed bed column dynamic study for boron removal from geothermal brine by a chelating fiber and breakthrough curve analysis by using mathematical models." Desalination 437 (July 2018): 1–6. http://dx.doi.org/10.1016/j.desal.2018.02.022.

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33

Gîlcă, Emilia, Andrada Măicăneanu, and Petru Ilea. "Kinetics analysis of zinc sorption in fixed bed column using a strongly basic anionic exchange resin." Water Science and Technology 71, no. 11 (2015): 1646–53. http://dx.doi.org/10.2166/wst.2015.136.

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The aim of this study was to examine the capacity of anionic resins to remove zinc as zinc chloride complexes in fixed bed. The applicability of the kinetics models and the characteristics of the bed (sorption capacity, breakthrough curve, depth of the adsorption zone) were taken into account. The influence of the process parameters, such as resin quantity (bed height) and zinc initial concentration, on the removal process was also considered. The obtained results (Amberlite IRA410) were analyzed using sorption kinetic models such as Thomas, Adam-Bohart, and Clark, by linear regression analysi

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34

Guo, Qiehui, Zhongyang Zang, Jie Ma, Jingyi Li, Tong Zhou, and Runping Han. "Adsorption of copper ions from solution using xanthate wheat straw." Water Science and Technology 82, no. 10 (2020): 2029–38. http://dx.doi.org/10.2166/wst.2020.487.

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Abstract To enhance adsorption capacity of wheat straw (WS) toward copper ion from solution, carbon disulfide was used to modify WS by a facile grafting method through epichlorohydrin and ethylenediamine. So WS containing xanthate groups (XWS) was obtained. The XWS was characterized using elemental analysis, X-ray diffraction, infrared spectroscopy and adsorption property of XWS toward copper ions. The results showed that S was introduced into the surface of WS. The solution pH was in favor of Cu2+ adsorption at pH 5, while NaCl existing in solution was slightly favorable for adsorption. The a

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35

Lim, Jun Hyun, Yong Seop Han, Sang Joon Lee, and Ki Yup Nam. "Risk factors for breakthrough vitreous hemorrhage after intravitreal tissue plasminogen activator and gas injection for submacular hemorrhage associated with age related macular degeneration." PLOS ONE 15, no. 12 (2020): e0243201. http://dx.doi.org/10.1371/journal.pone.0243201.

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Purpose We investigated risk factors for breakthrough vitreous hemorrhage (VH) after an intravitreal tissue plasminogen activator (tPA) and gas injection in patients with submacular hemorrhage (SMH) associated with age-related macular degeneration (AMD). Methods The medical records of patients diagnosed with SMH associated with AMD who received an intravitreal tPA (50 μg/0.05 mL) and perfluoropropane gas (0.3 mL) injection were reviewed retrospectively. We analyzed the associations of breakthrough VH with age, sex, best-corrected visual acuity, intraocular pressure, AMD subtype, accompanying s

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Punatar, Sachin, Lingaraj Nayak, Avinash Bonda, et al. "Ratio of total leukocyte count to C-reactive protein: does it help to differentiate infectious fever from engraftment fever in patients undergoing autologous hematopoietic stem cell transplant?" Cellular Therapy and Transplantation 9, no. 2 (2020): 40–46. http://dx.doi.org/10.18620/ctt-1866-8836-2020-9-2-40-46.

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Engraftment fever (EF) is a common complication of autologous HSCT (AHSCT). It is difficult to discern it from infectious fever (IF). We studied the significance of total blood leucocyte count (TLC) to C-reactive protein (CRP) ratio in differentiating EF from IF. 109 consecutive AHSCT patients were retrospectively analysed between March 2011 and August 2013. Breakthrough fever (BF) was defined as new-onset fever preceded by an afebrile period of at least 48 hours. The BF episodes were classified as IF or EF. Infectious fever was diagnosed in case of blood culture positivity, radiological signs

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37

Schmid, Bernhard H., Michael A. Hengl, and Ursula Stephan. "Salt tracer experiments in constructed wetland ponds with emergent vegetation: laboratory study on the formation of density layers and its influence on breakthrough curve analysis." Water Research 38, no. 8 (2004): 2095–102. http://dx.doi.org/10.1016/j.watres.2004.01.038.

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38

Yasui, Shinji, Tadashi Shojo, Goichi Inoue, Kunihiko Koike, Akihiro Takeuchi, and Yoshio Iwasa. "Gas-Solid Reaction Properties of Fluorine Compounds and Solid Adsorbents for Off-Gas Treatment from Semiconductor Facility." International Journal of Chemical Engineering 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/329419.

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We have been developing a new dry-type off-gas treatment system for recycling fluorine from perfluoro compounds present in off-gases from the semiconductor industry. The feature of this system is to adsorb the fluorine compounds in the exhaust gases from the decomposition furnace by using two types of solid adsorbents: the calcium carbonate in the upper layer adsorbs HF and converts it to CaF2, and the sodium bicarbonate in the lower layer adsorbs HF and SiF4and converts them to Na2SiF6. This paper describes the fluorine compound adsorption properties of both the solid adsorbents—calcium carbo

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39

Askari, Mahdi, Ehsan Salehi, Mohammad Ebrahimi, and Aboulfazl Barati. "Application of breakthrough curve analysis and response surface methodology for optimization of a hybrid separation system consisting of fixed-bed column adsorption and dead-end depth filtration." Chemical Engineering and Processing - Process Intensification 143 (September 2019): 107594. http://dx.doi.org/10.1016/j.cep.2019.107594.

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40

Manikrishna*, K. S. G. V., Veluru Sridevi, Sri Himaja Pamu, M. Tukaram Bai, and K. S. NV Prasad. "Biosorption of Malachite Green Dye from Wastewater with Henfeathers -Analysis of Various Mathematical Models Wrt Continuous Adsorption." International Journal of Innovative Technology and Exploring Engineering 10, no. 10 (2021): 15–23. http://dx.doi.org/10.35940/ijitee.j9387.08101021.

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In recent years, the remediation of hazardous organic dye-contaminated aquatic habitats has been a key research priority for environmental and chemical engineers. The goal of this research was to see how well malachite green adsorbs from waste water in a continuous column system having fixed bed. A biosorbent made from waste materials such as hen feathers has been shown to extract the water-soluble malachite green colour from waste water. The adsorption potential of malachite green dye ions in a continuous flow adsorption column is investigated in this work. The hen feathers' performance in th

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41

Ilk, Noyan, Guangzhi Shang, Shaokun Fan, and J. Leon Zhao. "Stability of Transaction Fees in Bitcoin: A Supply and Demand Perspective." MIS Quarterly 45, no. 2 (2021): 563–692. http://dx.doi.org/10.25300/misq/2021/15718.

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Cryptocurrencies such as Bitcoin are breakthrough financial technologies that promise to revolutionize the digital economy. Unfortunately, their long-term adoption in the business world is imperiled by a lack of stability that manifests as dramatic swings in transaction fees and severe participant dissatisfaction. To date, there has been little academic effort to study how system participants react to volatility in fee movements. Our study addresses this research gap by conceptualizing the Bitcoin platform as a data space market and studying how market equilibrium forms between users who deman

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Sugashini, S., and K. M. Meera Sheriffa Begum. "Column Adsorption Studies for the Removal of Cr(VI) Ions by Ethylamine Modified Chitosan Carbonized Rice Husk Composite Beads with Modelling and Optimization." Journal of Chemistry 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/460971.

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The objective of this present study is the optimization of process parameters in adsorption of Cr(VI) ions by ethylamine modified chitosan carbonized rice husk composite beads (EAM-CCRCBs) using response surface methodology (RSM) and continuous adsorption studies of Cr(VI) ions by ethylamine modified chitosan carbonized rice husk composite beads (EAM-CCRCBs). The effect of process variables such as initial metal ion concentration, adsorbent dosage and pH were optimized using RSM in order to ensure high adsorption capacity at low adsorbent dosage and high initial metal ion concentration of Cr(V

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Lu, Feng Lai, Jin Lei Liu, Dian Peng Li, Jian Zhang Wu, Yue Yuan Chen, and Yong Xin Wen. "Quantification and Enrichment of Esculeoside a from Fresh Tomato Fruits." Advanced Materials Research 396-398 (November 2011): 556–64. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.556.

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Esculeoside A, the tomato saponins from Lycopersicon esculentum MILL, may be metabolized into various steroidal hormones such as pregnane derivatives that are expected to exhibit various bioactivities in the body, such as anti-osteoporosis, antimenopausal disorder and anti-tumor actions. In order to enrich large amount of esculeoside A for further scientific research, we firstly developed a high performance liquid chromatography (HPLC) with evaporative light scattering detection (ELSD) method for its quantification, and used it to examined the content of esculeoside A in different cultivated v

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Herrero-Huerta, M., V. Meline, A. S. Iyer-Pascuzzi, A. M. Souza, M. R. Tuinstra, and Y. Yang. "ROOT PHENOTYPING FROM X-RAY COMPUTED TOMOGRAPHY: SKELETON EXTRACTION." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B4-2021 (June 30, 2021): 417–22. http://dx.doi.org/10.5194/isprs-archives-xliii-b4-2021-417-2021.

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Abstract. Breakthrough imaging technologies are a potential solution to the plant phenotyping bottleneck in marker-assisted breeding and genetic mapping. X-Ray CT (computed tomography) technology is able to acquire the digital twin of root system architecture (RSA), however, advances in computational methods to digitally model spatial disposition of root system networks are urgently required.We extracted the root skeleton of the digital twin based on 3D data from X-ray CT, which is optimized for high-throughput and robust results. Significant root architectural traits such as number, length, g

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Gaujoux, Renaud, Elina Starosvetsky, Naama Maimon та ін. "Cell-centred meta-analysis reveals baseline predictors of anti-TNFα non-response in biopsy and blood of patients with IBD". Gut 68, № 4 (2018): 604–14. http://dx.doi.org/10.1136/gutjnl-2017-315494.

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ObjectiveAlthough anti-tumour necrosis factor alpha (anti-TNFα) therapies represent a major breakthrough in IBD therapy, their cost–benefit ratio is hampered by an overall 30% non-response rate, adverse side effects and high costs. Thus, finding predictive biomarkers of non-response prior to commencing anti-TNFα therapy is of high value.DesignWe analysed publicly available whole-genome expression profiles of colon biopsies obtained from multiple cohorts of patients with IBD using a combined computational deconvolution—meta-analysis paradigm which allows to estimate immune cell contribution to

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Grindrod, Peter, Mark S. Edwards, Jenny J. W. Higgo, and Geoffrey M. Williams. "Analysis of colloid and tracer breakthrough curves." Journal of Contaminant Hydrology 21, no. 1-4 (1996): 243–53. http://dx.doi.org/10.1016/0169-7722(95)00051-8.

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puii, Lalchhing, Seung-Mok Lee, and Diwakar Tiwari. "Synthesis and Characterization of Chitosan templated Mesoporous Silica: Efficient use of Mesoporous Silica in the removal of Cu(II) from Aqueous Solutions." Science & Technology Journal 4, no. 2 (2016): 105–12. http://dx.doi.org/10.22232/stj.2016.04.02.04.

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A mesoporous silica was synthesized by annealing (3-Aminopropyl) triethoxysilane grafted chitosan at 800˚C. The mesoporous silica was characterized by the XRD (X-ray diffraction) analysis. The BET specific surface area and pore size of silica was found to be 178.42 m2/g and 4.13 nm. The mesoporous silica was then employed for the efficient remediation of aqueous solutions contaminated with Cu(II) under batch and column reactor operations. The mesoporous silica showed extremely high per cent removal of Cu(II) at wide pH range i.e., pH ~2.0 to 7.0. Relatively a fast uptake of Cu(II) was occurred

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Coronado, M., J. Ramírez Sabag, O. Valdiviezo Mijangos, and C. Somaruga. "A test of the effect of boundary conditions on the use of tracers in reservoir characterization." Geofísica Internacional 48, no. 2 (2009): 185–94. http://dx.doi.org/10.22201/igeof.00167169p.2009.48.2.2136.

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   Tracer tests are fundamental in characterizing fluid flow in underground formations. However, the setting of appropriate boundary conditions in even simple analytical models has historically been controversial, mainly due to the lack of sufficient physical evidence. Determining the relevance of boundary conditions on tracer test analysis becomes therefore a topic of renewed interest. The subject has been previously disscused by studying the tracer breakthrough curve sensitivity to diverse model parameter values. In our present work we examine the issue from a new practical

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Rudenko, Hannah C., Vasantha Brito-Babapulle, David Gonzalez, et al. "Combined aCGH and Mutational Analysis of CLL Patients with 17p Deletion." Blood 108, no. 11 (2006): 2091. http://dx.doi.org/10.1182/blood.v108.11.2091.2091.

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Abstract We have utilised aCGH (Breakthrough Breast Cancer Research Centre 5.8K array) and mutational analysis of the TP53 gene (exons 4–10) on 74 cases of CLL to define the extent of deletion at 17p, TP53 mutational status, additional genomic changes, and how this affects clinical outcome. 17p- cases were selected by FISH (n=37, Vysis LSI P53 probe) and 37 cases were selected as being representative of the survival curve of CLL patients without 17p-. FISH identified 22 cases with TP53- in ≥ 50% of cells, 4 cases with TP53- 20–50% and 11 cases with TP53- ≤ 20%. aCGH can detect abnormalities pr

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Mathias, S. A., A. P. Butler, T. C. Atkinson, S. Kachi, and R. S. Ward. "A parameter identifiability study of two chalk tracer tests." Hydrology and Earth System Sciences Discussions 3, no. 4 (2006): 2437–71. http://dx.doi.org/10.5194/hessd-3-2437-2006.

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Abstract. As with most fractured rock formations, Chalk is highly heterogeneous. Therefore, meaningful estimates of model parameters must be obtained at a scale comparable with the process of concern. These are frequently obtained by calibrating an appropriate model to observed concentration-time data from radially convergent tracer tests (RCTT). Arguably, an appropriate model should consider radially convergent dispersion (RCD) and Fickian matrix diffusion. Such a model requires the estimation of at least four parameters. A question arises as to whether or not this level of model complexity i

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