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Online since: January 2009
Authors: Yan Shi, Dong Mei Liu, Jia Zheng Li
Results shown: pore structure of cement stone incorporated phosphorus slag has
obvious fractal characteristics, D was between 2.887 ~ 3.936.
In recent years,with the developing of fracture mechanics and fractal theory, scholars have found that pore structure of some porous materials has obvious fractal characteristics, and D can be used to descript microporous structure and related properties such as physical and chemistry [1]~[3].
We can see there are good correlation between )log( dd dV and dlog , R was above 0.91 except two groups, which indicate pore structure of cement-based materials has obvious fractal characteristics, accord with Menger cavernous structure, D was between 2.887 to 3.926.
(3) Spatial distribution of cement paste was more uniform at early stage when phosphorus slag became finer, pore structure of cement stone less affected at later
Fractal structure features and their determinating methods of coal poress[J], Coal Conversion,18 (1):31 to 38(1995); [2] Zheng Ying, Zhou Yingbiao, Zheng Chuguang.
In recent years,with the developing of fracture mechanics and fractal theory, scholars have found that pore structure of some porous materials has obvious fractal characteristics, and D can be used to descript microporous structure and related properties such as physical and chemistry [1]~[3].
We can see there are good correlation between )log( dd dV and dlog , R was above 0.91 except two groups, which indicate pore structure of cement-based materials has obvious fractal characteristics, accord with Menger cavernous structure, D was between 2.887 to 3.926.
(3) Spatial distribution of cement paste was more uniform at early stage when phosphorus slag became finer, pore structure of cement stone less affected at later
Fractal structure features and their determinating methods of coal poress[J], Coal Conversion,18 (1):31 to 38(1995); [2] Zheng Ying, Zhou Yingbiao, Zheng Chuguang.
Online since: October 2011
Authors: Yan Xiang Wang, Jian Sun, Min Xu
S.Cole, “Thermal Chemistry of Colloidal Titanium Dioxide.”
W.Scherer, Sol-Gel Science, “The Physics and Chemistry of Sol-Gel Processing; ” Academic Press: San Diego, CAS 1990 [11] M.Niederberger, M.
Hubert Mutin,* and André Vioux, “A Solution Chemistry Study of Nonhydrolytic Sol-Gel Routes to Titania” Chem.
Indenbom, “Structure of Crystals”.
W.Scherer, Sol-Gel Science, “The Physics and Chemistry of Sol-Gel Processing; ” Academic Press: San Diego, CAS 1990 [11] M.Niederberger, M.
Hubert Mutin,* and André Vioux, “A Solution Chemistry Study of Nonhydrolytic Sol-Gel Routes to Titania” Chem.
Indenbom, “Structure of Crystals”.
Online since: April 2008
Authors: Mikko Hupa, Leena Hupa, Paul Ek, Susanne Taipale
Continuous Measurement of the Dissolution Rate
of Ions from Glasses
Susanne Taipale, Paul Ek, Mikko Hupa and Leena Hupa
Process Chemistry Centre, Åbo Akademi University, Piispankatu 8, FI-20500 Turku Finland
Corresponding author: Leena Hupa (leena.hupa@abo.fi)
Keywords: Glass, chemical durability, continuous ion release measurement, ICP-OES
Abstract.
Durability depends on the composition and structure of the glass and the composition of the attacking medium.
Acknowledgements This paper is part of the activities of the Åbo Akademi Process Chemistry Centre within the framework of the Centres of Excellence Programme by the Academy of Finland.
Paul: Chemistry of glasses (Chapman and Hall, London, 1982)
Durability depends on the composition and structure of the glass and the composition of the attacking medium.
Acknowledgements This paper is part of the activities of the Åbo Akademi Process Chemistry Centre within the framework of the Centres of Excellence Programme by the Academy of Finland.
Paul: Chemistry of glasses (Chapman and Hall, London, 1982)
Online since: February 2009
Authors: F.E. Okieimen, T.O. Egbuchunam, D.B. Balköse
Balköse
3, c
1
University of Benin, Department of Chemistry & Centre for Biomaterials Research, Benin City,
Nigeria
2
Department of Chemistry, Federal University of Petroleum Resources, PMB 1221, Effurun, Delta
State, Nigeria
3
Department of Chemical Engineering, Izmir Institute of Technology, Urla-Izmir, Turkey
a
fexokieimen@yahoo.com, btessychunam@yahoo.com, cdevrimbalkose@iyte.edu.tr
Keywords: Plasticized PVC, thermal stabilization, divalent metal soaps, epoxide, rubber seed oil
Abstract.
PVC's inherent instability to heat at the molecular level is generally attributed to weak links; allylic and tertiary chloride within the polymer structure.
Of International Chemistry Conference in Africa, Accra, Ghana, p. 383, (1995) [7] F.E.
PVC's inherent instability to heat at the molecular level is generally attributed to weak links; allylic and tertiary chloride within the polymer structure.
Of International Chemistry Conference in Africa, Accra, Ghana, p. 383, (1995) [7] F.E.
Online since: May 2013
Authors: Abdul Rahman Mohamed, Mehrnoush Khavarian
Numerous supported catalysts have been reported for CRM, e.g. inorganic oxides such as γ-Al2O3, Y2O3 and ZrO2[12-18].Carbon materials offer certain advantages over metal oxide-based catalysts such as their low cost, high surface area, high mechanical resistance, high thermal conductivity, the possibility of modifying the pore size distribution, good reductive propertiesand easy recovery of the active metal and modifying their surface chemistry[19].The publications on CRM over carbon-based nanocatalysts were fewer than other type of catalyst supports.
Kwak, Catalytic test of supported Ni catalysts with core/shell structure for dry reforming of methane, Fuel Processing Technology, 92 (2011) 1236
Subbarao, Effect of niobium promoters on iron-based catalysts for Fischer-Tropsch reaction, Journal of Fuel Chemistry and Technology, 40 (2012) 48-53
Suzuki, Oxidized diamond supported Ni catalyst for synthesis gas formation from methane, Chemistry Letters, 30 (2001) 460-461
Kwak, Catalytic test of supported Ni catalysts with core/shell structure for dry reforming of methane, Fuel Processing Technology, 92 (2011) 1236
Subbarao, Effect of niobium promoters on iron-based catalysts for Fischer-Tropsch reaction, Journal of Fuel Chemistry and Technology, 40 (2012) 48-53
Suzuki, Oxidized diamond supported Ni catalyst for synthesis gas formation from methane, Chemistry Letters, 30 (2001) 460-461
Online since: October 2010
Authors: Sami Areva, Leena Hupa, Minna Piispanen, Thomas Kronberg, Joe Pimenoff
Easy-to-clean coatings on glass and glazed surfaces
Minna Piispanen1,a, Thomas Kronberg2,b, Sami Areva3,c, Joe Pimenoff4,d and Leena Hupa1,e
1Process Chemistry Centre, Åbo Akademi University, Turku, Finland
2Ido Kylpyhuone Oy, Ekenäs, Finland
3Tampere University of Technology, Tampere, Finland
4Beneq Oy, Vantaa, Finland
aminna.piispanen@abo.fi
bthomas.kronberg@ido.fi
csami.areva@tut.fi
djoe.pimenoff@beneq.com
eleena.hupa@abo.fi
Keywords: easy-to-clean, glass, glazed surfaces, titania, fluoropolymer
Abstract.
However, the information and images obtained do not give detailed local nanoscaled surface structures directly comparable to AFM analysis [16].
Acknowledgements This work is part of the activities of the Åbo Akademi Process Chemistry Centre funded by the Academy of Finland in their Centres of Excellence Program.
A: Chemistry, Vol. 108 (1997), p.1 [4] M.
However, the information and images obtained do not give detailed local nanoscaled surface structures directly comparable to AFM analysis [16].
Acknowledgements This work is part of the activities of the Åbo Akademi Process Chemistry Centre funded by the Academy of Finland in their Centres of Excellence Program.
A: Chemistry, Vol. 108 (1997), p.1 [4] M.
Online since: September 2021
Authors: Athi Enkosi Mavukwana, Celestin Sempuga
These properties make tyres a major environmental issue as they are non-biodegradable due to this complex chemistry of organic polymers, metals and other inorganic chemicals.
A representative tyre molecular structure taken from Rowhani and Rainey [10] was use to estimate the enthalpy and Gibbs free energy using the Joback contribution method:
Industrial & Engineering Chemistry Research, 49(17), 8227-8237. https://doi.org/10.1021/ie100288h [6] Sempuga, B.C., Hildebrandt, D., Patel, B., & Glasser, D. (2011).
Industrial & Engineering Chemistry Research, 50(14), 8603-8619. https://doi.org/10.1021/ie2004785 [7] Sekwambane, B.P. (2012).
A representative tyre molecular structure taken from Rowhani and Rainey [10] was use to estimate the enthalpy and Gibbs free energy using the Joback contribution method:
Industrial & Engineering Chemistry Research, 49(17), 8227-8237. https://doi.org/10.1021/ie100288h [6] Sempuga, B.C., Hildebrandt, D., Patel, B., & Glasser, D. (2011).
Industrial & Engineering Chemistry Research, 50(14), 8603-8619. https://doi.org/10.1021/ie2004785 [7] Sekwambane, B.P. (2012).
Online since: September 2013
Authors: Suhaimi Abdul-Talib, Mohd Faizal Ab Jalil, Ain Nihla Kamarudzaman, Chia Chay Tay
The lignocellulosic composition of rubber tree sawdust which contains cellulose and lignin, both with a capacity for binding metal cations due to hydroxyl, carboxylic and phenolic groups present in their structure [12].
Arabian Journal of Chemistry, Vol. 4(4) (2011), p. 361–377
Calero, Copper biosorption by pine cone shell and thermal decomposition study of the exhausted biosorbent, Journal of Industrial and Engineering Chemistry, (2012)
Babanezhad, “Removal of Fe ( II ) from aqueous solution using pomegranate peel carbon : equilibrium and kinetic studies,” International Journal of Industrial Chemistry, Vol. 4 (1) (2013)
Arabian Journal of Chemistry, Vol. 4(4) (2011), p. 361–377
Calero, Copper biosorption by pine cone shell and thermal decomposition study of the exhausted biosorbent, Journal of Industrial and Engineering Chemistry, (2012)
Babanezhad, “Removal of Fe ( II ) from aqueous solution using pomegranate peel carbon : equilibrium and kinetic studies,” International Journal of Industrial Chemistry, Vol. 4 (1) (2013)
Online since: March 2019
Authors: Dwi Siswanta, Mudasir Mudasir, Fithriya Hasanah, Heni Octaviani
Chitosan-Pectin-Stearic Acid Film for Controlled-Release of Curcumin
DWI Siswantaa*, FITHRIYA Hasanahb, HENI Octavianic and MUDASIRd
Department of Chemistry, Universitas Gadjah Mada,
Sekip Utara PO BOX BLS 21 Yogyakarta 55281, Indonesia
adsiswanta@ugm.ac.id, bfithriya.hasanah22@gmail.com, chenioctaviani@gmail.com, dmudasir@ugm.ac.id
Keywords: chitosan, pectin, stearic acid, curcumin release
Abstract.
Stearic acid has a structure containing hydrophobic and hydrophilic groups.
Hasanah, Pembuatan Film Kitosan-Pektin dengan Penambahan Emulsifier Asam Stearat sebagai Matriks Pelepasan Kurkumin, Undergraduate Thesis, Department of Chemistry, Universitas Gadjah Mada, Yogyakarta, 2014
Octaviani, Studi Pelepasan In Vitro Kurkumin Menggunakan Membran Pektin-Kitosan dengan Emulsifier Asam Palmitat, Undergraduate Thesis, Department of Chemistry, Universitas Gadjah Mada, Yogyakarta, 2015
Stearic acid has a structure containing hydrophobic and hydrophilic groups.
Hasanah, Pembuatan Film Kitosan-Pektin dengan Penambahan Emulsifier Asam Stearat sebagai Matriks Pelepasan Kurkumin, Undergraduate Thesis, Department of Chemistry, Universitas Gadjah Mada, Yogyakarta, 2014
Octaviani, Studi Pelepasan In Vitro Kurkumin Menggunakan Membran Pektin-Kitosan dengan Emulsifier Asam Palmitat, Undergraduate Thesis, Department of Chemistry, Universitas Gadjah Mada, Yogyakarta, 2015
Online since: May 2019
Authors: Bryan B. Pajarito, John Andrew Kane P. Jovellana
Materials and Methods
The reagents used in the study include pectin from citrus peel (Galacturonic acid > 74.0%, dry basis, SIGMA Life Science), ammonium ferrous sulphate hexahydrate (99% AR, Loba Chemie) as initiator, acrylamide (suitable for electrophoresis, >99%, SIGMA Life Science), ammonia (NH3, anhydrous, >99.98%, SIGMA), and triethylenetetramine (TETA, technical grade, 60%, ALDRICH Chemistry).
Effects of pore structure and PEI impregnation on carbon dioxide adsorption by ZSM-5 zeolites.
Journal of Industrial and Engineering Chemistry, 23, 251-256. http://dx.doi.org/10.1016/j.jiec.2014.08.025 [3] Lu, W., Sculley, J.
The Journal of Physical Chemistry C, 117, 4057-4061. http://dx.doi.org/10.1021/jp311512q [4] Aruldoss, D., Saigoanker, R., Savarimuthu, J.
Effects of pore structure and PEI impregnation on carbon dioxide adsorption by ZSM-5 zeolites.
Journal of Industrial and Engineering Chemistry, 23, 251-256. http://dx.doi.org/10.1016/j.jiec.2014.08.025 [3] Lu, W., Sculley, J.
The Journal of Physical Chemistry C, 117, 4057-4061. http://dx.doi.org/10.1021/jp311512q [4] Aruldoss, D., Saigoanker, R., Savarimuthu, J.