Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: March 2006
Authors: Yi Zuo, Wei Hu Yang, Zhi Yue Tian, Ji Dong Li, Guo Yu Lv, Yu Bao Li
Tian
1,f
1 National Incubation Base for Nano-Biomaterials Industrialization,
Sichuan University, Chengdu 610064, China;
2 The College of Chemistry , Sichuan University, Chengdu 610064, China;
a
blueljd@163.com, blyb890130@263.net, czoae@vip.sina.com,
d
lgyhxy@yahoo.com.cn,
e
godsailor@126.com, fzhiyuetian@126.com ∗Corresponding author
keyword: nano-hydroxyapatite, antibacterial, security evaluation
Abstract: nano-hydroxyapatite (n-HA) slurry was synthesized at normal pressure, and (Cu2+,
Zn2+ )-bearing nano-hydroxyapatite (Cu-Zn-HA) was prepared by ion exchange reaction in water
medium.
Due to its good biocompatibility and special structure [6], hydroxyapatite is an ideal carrier to bear antibacterial ions.
The morphology and structure of n-HA and Cu-Zn-HA crystals were characterized by Transmission Electron Microscope (TEM) and X-ray Diffraction(XRD).
It indicates that Cu-Zn-HA has inherence apatite structure and no other phases present after some ion-exchange of Ca2+ by Cu2+ and Zn2+ .
FTIR analysis does not provide evidence for substantial change in chemical composition and structure of n-HA after some ion-exchange of Ca2+ by Cu2+ and Zn 2+ . 92 93 94 95 96 97 2 5 10 20 I ncubat i on t i me (min)Bacteriostasis rate (%) S.aureus E.coli Bacteriostasis rate experiments were carried out to test the antibacterial ability of Cu-Zn-HA on E.
Due to its good biocompatibility and special structure [6], hydroxyapatite is an ideal carrier to bear antibacterial ions.
The morphology and structure of n-HA and Cu-Zn-HA crystals were characterized by Transmission Electron Microscope (TEM) and X-ray Diffraction(XRD).
It indicates that Cu-Zn-HA has inherence apatite structure and no other phases present after some ion-exchange of Ca2+ by Cu2+ and Zn2+ .
FTIR analysis does not provide evidence for substantial change in chemical composition and structure of n-HA after some ion-exchange of Ca2+ by Cu2+ and Zn 2+ . 92 93 94 95 96 97 2 5 10 20 I ncubat i on t i me (min)Bacteriostasis rate (%) S.aureus E.coli Bacteriostasis rate experiments were carried out to test the antibacterial ability of Cu-Zn-HA on E.
Online since: September 2012
Authors: Tian Tian Liu, Guo Gen Xu, Xing Yun Wang, Ying Jia
In figure 1 , they were XRD of the sample a1, a2, the a3 in turn from up to down, in the figure, which can be seen is not only ZnO and TiO2, but also the composite products Zn (ZnTi) O4 in composite materials, and the diffraction peaks of ZnO and standard diffraction map (JCPDF: 89-0510) can be a very good consistency, belongs to the six party constitution fiber structure (space crystal group of belong to P63mc (186)), point the lattice constant a = b = 0.3249 nm, c = 0.5205 nm; The peak of TiO2 diffraction and the standard map (JCPDF: 74-1940) were identical, space crystal group belongs to C2 / m (12), point the lattice constant a = 12.179 nm, b = 3.741 nm, c = 6.525 nm; the diffraction peak of Zn (ZnTi)O4 is identical with standard map (JCPDF: 86-0156), belong to spinel structure (space crystal group of belong to Fd-3 m (227)), point the lattice constant a = b = c = 8.461 nm.
The diffraction peaks of Sample a1, a2 are very sharp, the surface of the composite material is high crystalline, the content of TiO2 in sample of a3 is much more, steamed bread peak is appeared, characteristic peaks are very weak, belong to the amorphous structure, it shows that the crystal is bad developed, the same as which reported in the literature [5].
ZnSn (OH) 6 diffraction peak conform to the standard map (JCPDF: 74-1825), belong to thorium rutile structure (space crystal group of Pn-3 belong to (201)), the point lattice constant a = b = c = 7.800 nm.
Journal of Natural Gas Chemistry, 18(2009):449-452
The diffraction peaks of Sample a1, a2 are very sharp, the surface of the composite material is high crystalline, the content of TiO2 in sample of a3 is much more, steamed bread peak is appeared, characteristic peaks are very weak, belong to the amorphous structure, it shows that the crystal is bad developed, the same as which reported in the literature [5].
ZnSn (OH) 6 diffraction peak conform to the standard map (JCPDF: 74-1825), belong to thorium rutile structure (space crystal group of Pn-3 belong to (201)), the point lattice constant a = b = c = 7.800 nm.
Journal of Natural Gas Chemistry, 18(2009):449-452
Online since: September 2013
Authors: Nor Azrina Resali, M.A.A. Ghani, A. Kalam, Wan Normimi Roslini Abdullah, Koay Mei Hyie
The smaller particle size results in the lower Hc value, which is probably due to the BCC+FCC mixture phase structure.
The structure became completely FCC.
Thus, the crystallite structure of Co-Ni-Fe was very interesting that it could have ordered FCC or BCC single phase, or FCC + BCC dual phase.
Only the nano-coating prepared at pH 7 showed a single FCC structure.
Min: Department of Physical Chemistry, Burcharest Vol. 1 (2009), p. 59-64
The structure became completely FCC.
Thus, the crystallite structure of Co-Ni-Fe was very interesting that it could have ordered FCC or BCC single phase, or FCC + BCC dual phase.
Only the nano-coating prepared at pH 7 showed a single FCC structure.
Min: Department of Physical Chemistry, Burcharest Vol. 1 (2009), p. 59-64
Online since: September 2020
Authors: Muhammad Asri Idris, N.M.N. Azira, Nur Farhana Mohd Yunos, Darus Murizam
This powder was then calcined at 950 °C under air flow to form a cubic phase of Ba0.5Sr0.5Co0.2Fe0.8 crystalline structure.
Characterisation Crystal structure investigation was carried out by X-ray diffraction (XRD, Bruker D2 Phaser) with Cu-Kα radiation source.
The spectrum showed that the pure cubic-perovskite phase structure of BSCF (JSPDS no. 01-078-6903) was successfully formed by EDTA-citrate-metal mixing method.
XPS characterisation technique was carried out to probe chemical structure of GO at different depth level from the surface as shown in Fig. 3.
-H., Chemistry characterization of jet aircraft engine particulate matter by XPS: Results from APEX III, Atmospheric Environment (2016), doi:10.1016/j.atmosenv.2016.05.039 [17] B.
Characterisation Crystal structure investigation was carried out by X-ray diffraction (XRD, Bruker D2 Phaser) with Cu-Kα radiation source.
The spectrum showed that the pure cubic-perovskite phase structure of BSCF (JSPDS no. 01-078-6903) was successfully formed by EDTA-citrate-metal mixing method.
XPS characterisation technique was carried out to probe chemical structure of GO at different depth level from the surface as shown in Fig. 3.
-H., Chemistry characterization of jet aircraft engine particulate matter by XPS: Results from APEX III, Atmospheric Environment (2016), doi:10.1016/j.atmosenv.2016.05.039 [17] B.
Online since: August 2013
Authors: Xiao Ting Li, Kai Jiang, Ping Wang
And it simplifies the mechanical structure, achieving a portable quantitative analyzer.
Fluorescence immune principle of strip quantitative detection The general structure of the immunochromatographic test strip is shown in Fig.1, mainly including a sample pad, a combination of pad, nitrocellulose membrane, an absorbent pad, and a plastic substrate, etc… In detection process, the sample was added to the absorbent pad, the solution moves on the strip by capillary action, the substance to be detected in the sample immune reacts with the detection receptor.
Fig. 1 Structure of fluorescent immune chromatography strips System Design Fluorescence immunoassay analyzer system block diagram is shown in Fig. 2, mainly made up from the optical scanning, optical transform, information processing, and human-computer interaction.
Structure, Principle and Progress of Fluorescence Immunity Analyzer.
Clinical Chemistry, 1983, 29(1): 60-64 [7] Tian Zhen, Yanbin Zhu, Zhouyi Guo.
Fluorescence immune principle of strip quantitative detection The general structure of the immunochromatographic test strip is shown in Fig.1, mainly including a sample pad, a combination of pad, nitrocellulose membrane, an absorbent pad, and a plastic substrate, etc… In detection process, the sample was added to the absorbent pad, the solution moves on the strip by capillary action, the substance to be detected in the sample immune reacts with the detection receptor.
Fig. 1 Structure of fluorescent immune chromatography strips System Design Fluorescence immunoassay analyzer system block diagram is shown in Fig. 2, mainly made up from the optical scanning, optical transform, information processing, and human-computer interaction.
Structure, Principle and Progress of Fluorescence Immunity Analyzer.
Clinical Chemistry, 1983, 29(1): 60-64 [7] Tian Zhen, Yanbin Zhu, Zhouyi Guo.
Online since: May 2021
Authors: I.V. Zaporotskova, E.S. Dryuchkov, D.E. Vilkeeva
Ivanovsky, Quantum chemistry in materials science, Ekaterinburg, Russia, 1999
Harris, Carbon Nanotubes and Related Structures: New Materials of the XXI Century, Moscow, Russia, 2003
Zaporotskova, Carbon and Non-Carbon Nanomaterials and Composite Structures Based on Them: Structure and Electronic Properties, Volgograd, Russia, 2009
Dresselhaus, Сarbon nanotubes: synthesis, structure, properties, and application, Springer-Verlag, 2000
Harris, Carbon Nanotubes and Related Structures: New Materials of the XXI Century, Moscow, Russia, 2003
Zaporotskova, Carbon and Non-Carbon Nanomaterials and Composite Structures Based on Them: Structure and Electronic Properties, Volgograd, Russia, 2009
Dresselhaus, Сarbon nanotubes: synthesis, structure, properties, and application, Springer-Verlag, 2000
Online since: November 2015
Authors: Ji Ping Wang, Yue Lin Jiang, Ju He, Jin Dan Wu
The Method of Introduced Amino Group for Preparation of Thermo-responsive Textiles
Ju He1,2,3,a, Yuelin Jiang1,2,3,b, Jindan Wu1,2,3,c*, Jiping Wang1,2,3,d
1 Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, PR China
2 National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry; Zhejiang Sci-Tech University, 310018 Hangzhou, China
3 MOE Engineering Research Center for Eco-Dyeing and Finishing of Textiles, Zhejiang Sci-Tech University, Hangzhou, 310018, China
ahejuyu@yeah.net, b1253797232@qq.com, cjindanwu@zstu.edu.cn, djipingwanghz@gmail.com
Keywords: Smart textile; Thermo-responsive; 2-Chloro-4,6-diamino-1,3,5-triazine (CDATA); NIPAAm; ATRP
Abstract.
The pristine cotton fabric was tightly woven and had a fibrous structure (Fig. 4(a)).
After being modified with BIBB, the cotton showed smooth but fibrous structures (Fig. 4(c)).
[12] Yang H, Esteves A, Zhu H, et al. < i> In-situ study of the structure and dynamics of thermo-responsive PNIPAAm grafted on a cotton fabric.
In-situ study of the structure and dynamics of thermo-responsive PNIPAAm grafted on a cotton fabric.
The pristine cotton fabric was tightly woven and had a fibrous structure (Fig. 4(a)).
After being modified with BIBB, the cotton showed smooth but fibrous structures (Fig. 4(c)).
[12] Yang H, Esteves A, Zhu H, et al. < i> In-situ study of the structure and dynamics of thermo-responsive PNIPAAm grafted on a cotton fabric.
In-situ study of the structure and dynamics of thermo-responsive PNIPAAm grafted on a cotton fabric.
Online since: March 2022
Authors: Triwikantoro Triwikantoro, Munaji Munaji, Yishar Kriswandono
Doping mechanisms such as acid-base chemistry can promote the formation of emeraldine salt.
The molecular structure of polyaniline in the emeraldine salt form is partially oxidized and partially reduced.
Ed.40 (2001) 2591 [6] Yakhmi J, Saxena V and Ashwal D Conducting Polymer Sensors, Actuators and Field-Effect Transistors Functional Materials (USA: Elsevier), 2012, pp. 61 [7] Saini D, Priydarshi M and Basu T, Effect of various structure directing agents on the properties of nanostructured conducting polyaniline Int.
Biotechnol. 174 (2014) 820 [10] Bhadra S and Khastgir D., Determination of crystal structure of polyaniline and substituted polyanilines through powder X-ray diffraction analysis Polym.
Test. 27 (2008) 851 [11] Pouget J P, Josefowicz M E, Epstein A J, Tang X and MacDiarmid A G, X-ray Structure of Polyaniline Macromolecules. 24 (1991) 779 [12] Chaudhari H K and Kelkar D S, X-ray Diffraction Study of Doped Polyaniline J.
The molecular structure of polyaniline in the emeraldine salt form is partially oxidized and partially reduced.
Ed.40 (2001) 2591 [6] Yakhmi J, Saxena V and Ashwal D Conducting Polymer Sensors, Actuators and Field-Effect Transistors Functional Materials (USA: Elsevier), 2012, pp. 61 [7] Saini D, Priydarshi M and Basu T, Effect of various structure directing agents on the properties of nanostructured conducting polyaniline Int.
Biotechnol. 174 (2014) 820 [10] Bhadra S and Khastgir D., Determination of crystal structure of polyaniline and substituted polyanilines through powder X-ray diffraction analysis Polym.
Test. 27 (2008) 851 [11] Pouget J P, Josefowicz M E, Epstein A J, Tang X and MacDiarmid A G, X-ray Structure of Polyaniline Macromolecules. 24 (1991) 779 [12] Chaudhari H K and Kelkar D S, X-ray Diffraction Study of Doped Polyaniline J.
Online since: March 2007
Authors: Wen Fu Lee, Ko Shao Chen, Su Chen Chen, Yi Chun Yeh, Hong Ru Lin, Heng Hsien Lee
However, this method has the difficulty in controlling the surface structure of the material so
the chemical treatment has been used [7,8].The chemical treatment uses the epoxidation to make the
nonpolar structure of PB block of SBS to produce the oxypolar group, and increases its adhesion and
oil resistance.
This study discussed the changing of membrane structure and wettability that were produced by these two polymerizations, and the influences of monomer concentration, reaction time, response of liquid density, etc. on grafting percentage.
Chemical structure Fig. 6 is the ATR/FTIR graph of SBS membranes (a) grafted with AA using the UV graft-polymerization (b) and thermal polymerization (c).
Zhao: Journal of Fluorine Chemistry Vol. 104(2000), p.285 9.
This study discussed the changing of membrane structure and wettability that were produced by these two polymerizations, and the influences of monomer concentration, reaction time, response of liquid density, etc. on grafting percentage.
Chemical structure Fig. 6 is the ATR/FTIR graph of SBS membranes (a) grafted with AA using the UV graft-polymerization (b) and thermal polymerization (c).
Zhao: Journal of Fluorine Chemistry Vol. 104(2000), p.285 9.
Online since: November 2013
Authors: Hui Min Sun, Ming Xue Zhang, Zhao Zhan Gu
The stealth material can be divided into two kinds of painting type and structure type according to molding process and carrying capacity.
The structure type stealth material has dual function of bearing and minishing radar reflection section.
The test of structure and property (1)The microstructures of carbon nanotubes powders, Sm2O3 powders and impure Sm2O3/acrylate coatings were studied by JSM-5900 scanning electron microscope (SEM) of Joel Corporation in Japan
Results and discussion Analysis of structure.
Multiwalls carbon nanotubes (MWCNTs) were produced by Chengdu Organic Chemistry Limited Company of Chinese Academy of Sciences in the experiment.
The structure type stealth material has dual function of bearing and minishing radar reflection section.
The test of structure and property (1)The microstructures of carbon nanotubes powders, Sm2O3 powders and impure Sm2O3/acrylate coatings were studied by JSM-5900 scanning electron microscope (SEM) of Joel Corporation in Japan
Results and discussion Analysis of structure.
Multiwalls carbon nanotubes (MWCNTs) were produced by Chengdu Organic Chemistry Limited Company of Chinese Academy of Sciences in the experiment.