Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: September 2022
Authors: Annisa Tsalsabila, Bangkit Mahardi, Yuliati Herbani, Yessie Widya Sari
The morphological structure of the samples after calcium and phosphate addition without NaOH was seen in Figure 1.
FE-SEM images of samples with adjusted pH Morphological Structure and Elemental Mapping of A1, G1, and C1.
In G1, the morphological shape was needle-like structure and agglomerated spherical shape.
In C1, the morphological structure was needle-like.
Nanomater. 2012 734398 [9] Bischoff R and Schlüter H 2012 Amino acids: Chemistry, functionality and selected non-enzymatic post-translational modifications J.
FE-SEM images of samples with adjusted pH Morphological Structure and Elemental Mapping of A1, G1, and C1.
In G1, the morphological shape was needle-like structure and agglomerated spherical shape.
In C1, the morphological structure was needle-like.
Nanomater. 2012 734398 [9] Bischoff R and Schlüter H 2012 Amino acids: Chemistry, functionality and selected non-enzymatic post-translational modifications J.
Online since: July 2011
Authors: Feng Lin, Wu Ying Zhang, Ling Xu, Hong Bo Liu
Preparation of Novel Series of UV Dual Curable Polyurethane-Modified Epoxy Monoacrylates and Their Films Properties
Hongbo Liu1,a, Feng Lin1,b, Wuying Zhang1 and Ling Xu1
1 School of Applied Chemistry and Biological Technology, Shenzhen Polytechnic, Shenzhen 518055, People’s Republic of China
alhb206@163.com, blfeng00@yahoo.com.cn
Keywords: preparation, UV dual curable, properties, photopolymerization
Abstract.
The idealized molecular structures of PMEMA are shown in Fig. 1.
Analyzing from the molecular structure, the number of reactive groups from sample 2 to sample 7 with the same weight decreased with side chain length of polyurethane increasing.
Because there were two acrylic groups (double bond) and one epoxy group in the PMEMA molecular structure, the three-functional resin PMEMA can crosslink in network structure of the radical-cationic UV dual cured films and didn’t extract by solvent, even if one reactive group (double bond or epoxy) in PMEMA polymerized under UV irradiation.
This is because the double bonds and epoxy groups can effectively crosslink and form three-dimensional network structure, namely, the structure of the radical-cationic UV dual cured films was densest (the most compact): the films resisted most penetration of water molecules into films.
The idealized molecular structures of PMEMA are shown in Fig. 1.
Analyzing from the molecular structure, the number of reactive groups from sample 2 to sample 7 with the same weight decreased with side chain length of polyurethane increasing.
Because there were two acrylic groups (double bond) and one epoxy group in the PMEMA molecular structure, the three-functional resin PMEMA can crosslink in network structure of the radical-cationic UV dual cured films and didn’t extract by solvent, even if one reactive group (double bond or epoxy) in PMEMA polymerized under UV irradiation.
This is because the double bonds and epoxy groups can effectively crosslink and form three-dimensional network structure, namely, the structure of the radical-cationic UV dual cured films was densest (the most compact): the films resisted most penetration of water molecules into films.
Online since: July 2015
Authors: Bernhard Wielage, Kristina Roder, Lothar Kroll, Guntram Wagner, Andreas Todt, Daisy Nestler, Stefan Spange, Natalia Nier, Erik Päßler, Julia Weißhuhn, Hendryk Würfel
Structure.
The mixtures with moderate stearate content display a homogeneous structure.
Structure.
Properties of the C/C-SiC composites Structure.
The composites with a medium concentration of stearate (2.5 % and 3.75 %) have similar structures.
The mixtures with moderate stearate content display a homogeneous structure.
Structure.
Properties of the C/C-SiC composites Structure.
The composites with a medium concentration of stearate (2.5 % and 3.75 %) have similar structures.
Online since: February 2017
Authors: V.A. Shabashov, L.G. Korshunov, V.A. Semionkin, A.E. Zamatovsky, A.V. Litvinov, V.A. Zavalishin, S.V. Borisov, S.V. Afanasiev
Mikheev, Ural Branch RAS, Yekaterinburg 620990, Russian Federation
2Institute of Chemistry of Solids, Ural Branch RAS, Yekaterinburg 620990, Russian Federation
3Ural Federal University named the first President of Russian Federation B.N.
The aim of this work was to create the structure characterized by gradients of composition and/or thermal expansion coefficient according to the proposed in [1] scheme.
The obtained structure was investigated by methods of the foil deflection (for details see the next section) and Mossbauer spectroscopy.
If the steel sample with the gradient structure is heated, it is curved.
The degree of the curvature at the given heating depends on characteristics of the gradient structure.
The aim of this work was to create the structure characterized by gradients of composition and/or thermal expansion coefficient according to the proposed in [1] scheme.
The obtained structure was investigated by methods of the foil deflection (for details see the next section) and Mossbauer spectroscopy.
If the steel sample with the gradient structure is heated, it is curved.
The degree of the curvature at the given heating depends on characteristics of the gradient structure.
Online since: April 2014
Authors: Dae Hyun Jeong, Young Il Kwon
Although convergence has been discussed mainly in communication, information technology, and electronic fields, it has also appeared in chemistry and energy industries recently [1].
Its network structure characteristic enables it to not only approach other nodes in a group via the shortest path, but also monitor information flow as well.
Also, the structure of information contained in a patent can be useful for investigating R&D activities and the structure of relevant knowledge [18].
When betweenness centrality of IPC network structure was analyzed, semiconductor device field using super conductive magnetic was found to be still high.
When IPC betweenness centrality of IPC network structure was analyzed, centrality ranking of IPCs in photovoltaic energy field was found to have elevated.
Its network structure characteristic enables it to not only approach other nodes in a group via the shortest path, but also monitor information flow as well.
Also, the structure of information contained in a patent can be useful for investigating R&D activities and the structure of relevant knowledge [18].
When betweenness centrality of IPC network structure was analyzed, semiconductor device field using super conductive magnetic was found to be still high.
When IPC betweenness centrality of IPC network structure was analyzed, centrality ranking of IPCs in photovoltaic energy field was found to have elevated.
Online since: June 2018
Authors: Olena Svietkina, Stanislav Bartashevskyi, Valeriy Nikolsky, Kostiantyn Bas, Peter Chlens, Victor Zaharchuk
Introduction
Synthesis of new inorganic compounds with the preset properties is the basic problem of chemistry and solid state physics.
To simplify the process of promoting agent preparation, we have proposed feldspar as it contains oxides of alkaline metals (mainly, K2O) and Al2O3 being rather good structural modifying agent making it possible to preserve porous structure of the contact; the structure may be broken due to coking if there is no modifying agent.
Thus, there is a change in oxygen index while transferring of octahedral structure characteristic for a-Fe2O3 to the structure of “inverse” spinel being characteristic for Fe3O4.
In terms of general and local consideration of Fe3O4 structure, it can be seen that the compound contains atoms of iron in two oxidation degrees.
The model is well proved by the experimental data on observing the mutual intergrowth of the structures of both phases.
To simplify the process of promoting agent preparation, we have proposed feldspar as it contains oxides of alkaline metals (mainly, K2O) and Al2O3 being rather good structural modifying agent making it possible to preserve porous structure of the contact; the structure may be broken due to coking if there is no modifying agent.
Thus, there is a change in oxygen index while transferring of octahedral structure characteristic for a-Fe2O3 to the structure of “inverse” spinel being characteristic for Fe3O4.
In terms of general and local consideration of Fe3O4 structure, it can be seen that the compound contains atoms of iron in two oxidation degrees.
The model is well proved by the experimental data on observing the mutual intergrowth of the structures of both phases.
Online since: June 2014
Authors: Gustavo Lopez-Tellez, Susana Hernández López, Enrique Vigueras Santiago, José Encarnación Moreno Marcelino
This implies that the graphitic structure suffered acid attack.
The increase in intensity for the signals associated to the π-π* band, corroborates the structure change of the MWNT [29], meaning that the opened ends and/or the defect sites generated by the acid treatment destroys the stability of the conjugated structure [29].
Simon, The effect of functionalization on structure and electrical conductivity of multi-walled carbon nanotubes, J.
Du, Effect of chemical oxidation on the structure of single-walled carbon nanotubes, J.
Haddon, Chemistry of single-walled carbon nanotubes, Acc.
The increase in intensity for the signals associated to the π-π* band, corroborates the structure change of the MWNT [29], meaning that the opened ends and/or the defect sites generated by the acid treatment destroys the stability of the conjugated structure [29].
Simon, The effect of functionalization on structure and electrical conductivity of multi-walled carbon nanotubes, J.
Du, Effect of chemical oxidation on the structure of single-walled carbon nanotubes, J.
Haddon, Chemistry of single-walled carbon nanotubes, Acc.
Online since: November 2024
Authors: Endang Susilowati, Sri Retno Dwi Ariani, Lina Mahardiani, Refisan Naufa Aisy
It is influenced by the presence of free functional groups in the molecular structure network, which can bind water [9].
It indicates that the film structure was homogeneous and compact.
This increment is caused by the hollow structure of the films due to the formation of the Chit-KC polyelectrolyte complex, where the hollow structure can trap large amounts of water.
The WVP depends on its structure, morphology, and environmental temperature.
Batista et al., Hydrogel as an Alternative Structure for Food Packaging Systems, Carbohydr.
It indicates that the film structure was homogeneous and compact.
This increment is caused by the hollow structure of the films due to the formation of the Chit-KC polyelectrolyte complex, where the hollow structure can trap large amounts of water.
The WVP depends on its structure, morphology, and environmental temperature.
Batista et al., Hydrogel as an Alternative Structure for Food Packaging Systems, Carbohydr.
Online since: June 2013
Authors: Kannan Rassiah, M.M.H. Megat Ahmad
Palana: Engineering Chemistry.
Composite Structures, Vol. 63 (2004), pp.305–312
Shimizu: Fiber texture and mechanical graded structure of bamboo.
Janssen: An environmental, economic and practical assessment of bamboo as a building material for supporting structures.
Shimizu: Fiber texture and mechanical graded structure of bamboo, Composites; Part B, Vol. 28B (1997), pp.13-20
Composite Structures, Vol. 63 (2004), pp.305–312
Shimizu: Fiber texture and mechanical graded structure of bamboo.
Janssen: An environmental, economic and practical assessment of bamboo as a building material for supporting structures.
Shimizu: Fiber texture and mechanical graded structure of bamboo, Composites; Part B, Vol. 28B (1997), pp.13-20
Online since: June 2022
Authors: Panagiotis Poulopoulos, Nikolaos C. Diamantopoulos, Dimitrios I. Anyfantis, Nikolaos Bouropoulos, Politis Constantin, Alexandros Barnasas
It can find different applications depending on its structure.
X-ray diffraction (XRD) revealed the structure of the films.
Inzani et al. [42] also investigated the crystal structures, electronic structures, and electrical and optical properties of molybdenum oxide thin films by changing the O/Mo ratio.
Troitskaia, Morphology and structure of hexagonal MoO3 nanorods, Inorg.
Mazali, Structural evolution in crystalline MoO3 nanoparticles with tunable size, Journal of Solid State Chemistry. 190 (2012) 80-84
X-ray diffraction (XRD) revealed the structure of the films.
Inzani et al. [42] also investigated the crystal structures, electronic structures, and electrical and optical properties of molybdenum oxide thin films by changing the O/Mo ratio.
Troitskaia, Morphology and structure of hexagonal MoO3 nanorods, Inorg.
Mazali, Structural evolution in crystalline MoO3 nanoparticles with tunable size, Journal of Solid State Chemistry. 190 (2012) 80-84