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Online since: March 2022
Authors: Emmanuel Ikechukwu Ugwu, Jonah Chukwuemeka Agunwamba
Journal of Industrial and Engineering Chemistry 21,414–422
Arabian Journal of Chemistry 7, 101–108
Journal of Physical Chemistry, 57, 385-470
Integrated Study of the Porous Structure of Activated Carbon from Carbonized Sucrose.Carbon, 2: 261 - 268
Pore structure and adsorption performance of the KOH-activated carbons prepared from corncob.
Arabian Journal of Chemistry 7, 101–108
Journal of Physical Chemistry, 57, 385-470
Integrated Study of the Porous Structure of Activated Carbon from Carbonized Sucrose.Carbon, 2: 261 - 268
Pore structure and adsorption performance of the KOH-activated carbons prepared from corncob.
In Vivo Characterisation of a Novel Hydrophilic Composite for Total Intervertebral Disc Substitution
Online since: April 2005
Authors: L. Ambrosio, Peter A. Revell, Elsie Damien, F. Causa
However, such properties are
depended on the location and structure of IVD, as the mechanical properties of IVD change locally
[1].
Surface topography, chemistry and wettability or hydrophobicity influence cell attachment and growth on the biomaterial surface [4].
Surface topography, chemistry and wettability or hydrophobicity influence cell attachment and growth on the biomaterial surface [4].
Online since: July 2024
Authors: Mbongeni Ngwenya, Katekani Shingange, Fisokuhle Kumalo, Thandi Patricia Gumede, Dolly Grace Ann Selikane, Thembinkosi Donald Malevu
Beyond its role in plant structure, cellulose plays a significant economic role, serving as a raw material for paper and fiber production [11, 12].
Chemical structure analysis: Fourier-transform infrared (FTIR) spectroscopy The powdered EA cellulose, neat PCL, as well as 97/3 w/w PCL/EA cellulose composite, were placed on the microscope stage and clamped.
Neat PCL revealed diffraction peaks at 21.8º and 24.2º corresponding to the (110) and (200) planes of the orthorhombic crystal structure.
Rojas, Cellulose Nanocrystals: Chemistry, Self-Assembly, and Applications, Chem.
Grafting of Polycaprolactone on Oxidized Nanocelluloses by Click Chemistry, Nanomaterials. 3 (2013) 141-157
Chemical structure analysis: Fourier-transform infrared (FTIR) spectroscopy The powdered EA cellulose, neat PCL, as well as 97/3 w/w PCL/EA cellulose composite, were placed on the microscope stage and clamped.
Neat PCL revealed diffraction peaks at 21.8º and 24.2º corresponding to the (110) and (200) planes of the orthorhombic crystal structure.
Rojas, Cellulose Nanocrystals: Chemistry, Self-Assembly, and Applications, Chem.
Grafting of Polycaprolactone on Oxidized Nanocelluloses by Click Chemistry, Nanomaterials. 3 (2013) 141-157
Online since: September 2015
Authors: Monika Kašiarová, Miroslav Hnatko, Pavol Šajgalík, Zuzana Pramuková Vilčeková, Magdaléna Precnerová Domanická
Local Mechanical Properties of Highly Porous Si3N4 for Trabecular Bone Replacement
Zuzana Pramuková Vilčeková1,a*, Monika Kašiarová1,b,
Magdaléna Precnerová Domanická2,c, Miroslav Hnatko2,d
and Pavol Šajgalík2,e
1Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, Košice, Slovakia
2Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, Bratislava, Slovakia
azvilcekova@imr.saske.sk, bmkasiarova@imr.saske.sk, cmagdalena.domanicka@savba.sk, duachmiho@savba.sk, euachsajg@savba.sk
Keywords: Silicon nitride, trabecular bone, hardness, young’s modulus, yield strength
Abstract.
These materials were produced using replication method with polyurethane foams as pore-forming agents to achieve similar porous structure to trabecular bone.
Prepared porous ceramics had a bimodal pore structure with macro-pores larger than 200 µm and micro-pores smaller than 1 µm in diameter, which are necessary for tissue ingrowths, cell adhesion, adsorption of biological metabolites and nutrition delivery in organism.
Introduction Highly porous materials are attracting considerable interest due to their unique morphology and structure property relationship.
These materials were produced using replication method with polyurethane foams as pore-forming agents to achieve similar porous structure to trabecular bone.
Prepared porous ceramics had a bimodal pore structure with macro-pores larger than 200 µm and micro-pores smaller than 1 µm in diameter, which are necessary for tissue ingrowths, cell adhesion, adsorption of biological metabolites and nutrition delivery in organism.
Introduction Highly porous materials are attracting considerable interest due to their unique morphology and structure property relationship.
Online since: September 2013
Authors: Meng Shu Han, Ji Wei Hu, Jin Luo
Unmodified gold–nanopartilces used as probes for detection of coralyne with poly (A40)
Mengshu Han 1, a,*, Jiwei Hu 2, b, Jin Luo 2, c
1 Deapartment of chemistry and materials science, Guizhou Normal University, Guiyang, China.
2 Guizhou Provincial Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment, Guizhou Normal University, Guiyang, China.
Coralyne is a kind of protoberberine alkaloids with strong anticancer activity in animal models, which could induce single-stranded adenine rich nucleic acids (poly (dA)) to form a duplex structure.
Coralyne has a planar heterocyclic molecular structure which is able to bind to single-stranded DNA (ssDNA) [13, 14].
Due to the heterocyclic structure, coralyne could insert into DNA.
Therefore, as shown in Fig. 1, the addition of coralyne can cause ssDNA into duplex structure and leave AuNPs, and in this way, the electrostatic forces are weak and can be easily aggregated by NaCl [15].
Coralyne is a kind of protoberberine alkaloids with strong anticancer activity in animal models, which could induce single-stranded adenine rich nucleic acids (poly (dA)) to form a duplex structure.
Coralyne has a planar heterocyclic molecular structure which is able to bind to single-stranded DNA (ssDNA) [13, 14].
Due to the heterocyclic structure, coralyne could insert into DNA.
Therefore, as shown in Fig. 1, the addition of coralyne can cause ssDNA into duplex structure and leave AuNPs, and in this way, the electrostatic forces are weak and can be easily aggregated by NaCl [15].
Online since: May 2011
Authors: Tao Tao Qiang, Xiang Luo, Long Fang Ren, Xue Chuan Wang, Bao Yuan He
Preparation, Characterization and Application of Siloxane Succinate Fatliquor
Taotao Qianga, Xiang Luob, Longfang Renc,, Xuechuan Wangd,* Author for correspondence:e-mail: wxc-mail@163.com
, Baoyuan Hee
Key Laboratory of Chemistry and Technology for Light Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology,
Xi’an Shaanxi, P.
The molecular structure of PMPS was characterized by FTIR spectra; the thermal properties of PMPS was characterized and analyzed by TGA.
Silicone surfactants, a class of chemicals characterized by some particularly properties unlike common hydrocarbon surfactants with a different molecular structure, have attracted much attention in recently years [2,3].
Then, the molecular structure of the raw material and PMPS were characterized and analyzed by modern instrumental analysis.
The physical and mechanical properties of leather fattened by different fatliquors Index PMPSF-3 RF-1 L-3 Increase in thickness/% 5.18 4.67 4.56 Tensile strength/(N/mm2) 25.30 23.20 24.13 Elongation at break/(%) 50.12 55.34 53.10 Extension at 5N/mm2/% 33.10 42.31 41.33 Tearing strength/(N/mm) 38.21 26.33 23.31 Conclusions PMPS was synthesized by ring-opening reaction using PAPS with MA as the raw materials, and the molecular structures were characterized by FTIR.
The molecular structure of PMPS was characterized by FTIR spectra; the thermal properties of PMPS was characterized and analyzed by TGA.
Silicone surfactants, a class of chemicals characterized by some particularly properties unlike common hydrocarbon surfactants with a different molecular structure, have attracted much attention in recently years [2,3].
Then, the molecular structure of the raw material and PMPS were characterized and analyzed by modern instrumental analysis.
The physical and mechanical properties of leather fattened by different fatliquors Index PMPSF-3 RF-1 L-3 Increase in thickness/% 5.18 4.67 4.56 Tensile strength/(N/mm2) 25.30 23.20 24.13 Elongation at break/(%) 50.12 55.34 53.10 Extension at 5N/mm2/% 33.10 42.31 41.33 Tearing strength/(N/mm) 38.21 26.33 23.31 Conclusions PMPS was synthesized by ring-opening reaction using PAPS with MA as the raw materials, and the molecular structures were characterized by FTIR.
Online since: February 2011
Authors: Xin Liu, Hui Min Guo, Chang Gong Meng
TiOx Film formation on NiTi alloy (100) Surface: Density Functional Theory Investigation
Xin Liu 1, a, Huimin Guo1,b and Changgong Meng1,c
1School of Chemistry, Dalian University of Technology, Dalian, 116024, P.
The similarity between these 2 structures and stable surface structure of corresponding TiOx phase is ready to see.
Further evolution of these structures would lead to formation of TiOx oxide layer.
The reaction coordinate is set according to the atomic structures in Fig.1.
The change in atomic structure shows the surface reconstruction to form structure in Fig. 1(b) is just the final result of O2 dissociation.
The similarity between these 2 structures and stable surface structure of corresponding TiOx phase is ready to see.
Further evolution of these structures would lead to formation of TiOx oxide layer.
The reaction coordinate is set according to the atomic structures in Fig.1.
The change in atomic structure shows the surface reconstruction to form structure in Fig. 1(b) is just the final result of O2 dissociation.
Online since: June 2012
Authors: Jian Feng Zhu, Rui Juan Pan
Synthesis of Layered-ternary Ti2AlC/Al2O3 Composites by an In situ Reaction and Hot Pressing Sintering
Jianfeng Zhu a and Ruijuan Pan b
Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi'an 710021, China
azhujf@sust.edu.cn, bpanrj220@126.com
Keywords: Ti2AlC/Al2O3 composites; hot pressing; solid solution
Abstract.
Compared with the monolithic Ti2A1C, (Ti,Mo)2AlC/10 wt% Al2O3 composite possesses a fine grain sized structure.
Compared with the monolithic Ti2A1C, (Ti,Mo)2AlC/10 wt% Al2O3 composite possesses a fine grain sized structure.
Online since: September 2018
Authors: Vladimir S. Egorkin, Sergey L. Sinebryukhov, Sergey V. Gnedenkov, Igor E. Vyaliy, Alexander N. Minaev, Nikolay S. Sviridov
Gnedenkov1,2,f
1Institute of Chemistry FEB RAS, 159 Pr.100-letiya Vladivostoka, Vladivostok, 690022, Russia
2Far Eastern Federal University, 8 Sukhanova St., Vladivostok 690950, Russia
aegorkin@ich.dvo.ru, bigorvyal@gmail.com, csviridov_hc@mail.ru,
daminaev@mail.ru, esls@ich.dvo.ru, fsvg21@hotmail.com
Keywords: Protective coatings, plasma electrolytic oxidation, aluminum, polytetrafluoroethylene, electrochemical impedance spectroscopy.
Composite fluoropolymer coatings were obtained on the base layers in two ways allowing the formation of two different types of morphological structure: a continuous polymer film and a multimodal islet relief.
However, the conducted studies of the structure of oxide coatings formed by this method show that in some cases the level of their barrier properties does not fully meet the requirements for the protection of structures and apparatuses [5].
Composite fluoropolymer coatings were obtained on the base layers in two ways allowing the formation of two different types of morphological structure: a continuous polymer film and a multimodal islet relief.
However, the conducted studies of the structure of oxide coatings formed by this method show that in some cases the level of their barrier properties does not fully meet the requirements for the protection of structures and apparatuses [5].
Online since: October 2011
Authors: Wen Zheng Huang
On the vulnerability of historical masonry structures: analysis and mitigation.
Materials and Structures, 2007,40(7)
Strengthening of historic masonry structures with composite materials.
Materials and Structures, 1997,30(8)
Materials and Structures, 2000,33(3)
Materials and Structures, 2007,40(7)
Strengthening of historic masonry structures with composite materials.
Materials and Structures, 1997,30(8)
Materials and Structures, 2000,33(3)