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Online since: May 2011
Authors: Yong Sheng Shi, Hui Rong Zhao, Di Mai
The important applications of ball structure ZnO use in the sweetening agent.
The morphology of the as-synthesized ZnO powders as shown in Fig. 2 that the spherical structures, the loose structure of knitting wool round state and rod flower-like structure formed by changing the pH value.
When the pH value increases to 12, the ZnO pellet of.wool clew shape with loose structure were obtains.
Single flower petal the growth mechanism is the same with the rodlike structure ZnOs formation mechanism.
Kong : Chinese Chemistry, Vol. 62 (17) (2004), p. 1658 [6] C.
The morphology of the as-synthesized ZnO powders as shown in Fig. 2 that the spherical structures, the loose structure of knitting wool round state and rod flower-like structure formed by changing the pH value.
When the pH value increases to 12, the ZnO pellet of.wool clew shape with loose structure were obtains.
Single flower petal the growth mechanism is the same with the rodlike structure ZnOs formation mechanism.
Kong : Chinese Chemistry, Vol. 62 (17) (2004), p. 1658 [6] C.
Online since: January 2014
Authors: Ivan Silva Prado, Moacyr Clemente Júnior, Sylma Carvalho Maestrelli, Neide Aparecida Mariano, Lucia Helena Innocentini-Mei, Rodrigo Fernando Costa Marques, Maria Gabriela Nogueira Campos, Karine Cappucio de Castro
The band related to the stretching vibration of the carbonyl group (amide I) corresponds to a sensitive marker of peptide secondary structure.
The bands corresponding to the amide groups II and amide III are also sensitive to changes in protein secondary structure.
It occurs due to the breakage of triple helix structures and results in an amorphous structure consisting by the polypeptide chains [8].
SEM Collagen presents a structure consisting of randomly agglomerated fibers.
[10] Hui Cao and Shi-Ying Xu: Food Chemistry (2008), p. 439
The bands corresponding to the amide groups II and amide III are also sensitive to changes in protein secondary structure.
It occurs due to the breakage of triple helix structures and results in an amorphous structure consisting by the polypeptide chains [8].
SEM Collagen presents a structure consisting of randomly agglomerated fibers.
[10] Hui Cao and Shi-Ying Xu: Food Chemistry (2008), p. 439
Online since: October 2011
Authors: He Xing Li, Jian Zhu, Xi Li, Fu Jian Lv, Jin Guo Wang, Zong Li Xie, Manh Hoang
China
2Department of Chemistry, Shanghai Normal University, Shanghai, 200234, P.R.
SnS2 is an n-type semiconductor with a layered CdI2-type structure.
From Fig. 3a, it was informed that these two samples both had the mesoporous structure.
Table 1 The structure parameters of as-prepared samples.
As a reference, CdS was prepared at 160 oC by the similar method, with the similar structures as shown as Table 1.
SnS2 is an n-type semiconductor with a layered CdI2-type structure.
From Fig. 3a, it was informed that these two samples both had the mesoporous structure.
Table 1 The structure parameters of as-prepared samples.
As a reference, CdS was prepared at 160 oC by the similar method, with the similar structures as shown as Table 1.
Online since: January 2026
Authors: Abduallah M. Ali, Mahmood A. Yaseen, Ahmed N. Abd
X-ray diffraction (XRD) tests revealed that the SeO2 nanoparticles showed a face-centered cubic (FCC) structure.
The Journal of Physical Chemistry B, 2000. 104(26): p. 6152-6163
The Journal of Physical Chemistry B, 1999. 103(8): p. 1226-1232
The Journal of Physical Chemistry C, 2009. 113(44): p. 19091-19095
Materials chemistry and physics, 2006. 98(2-3): p. 191-194
The Journal of Physical Chemistry B, 2000. 104(26): p. 6152-6163
The Journal of Physical Chemistry B, 1999. 103(8): p. 1226-1232
The Journal of Physical Chemistry C, 2009. 113(44): p. 19091-19095
Materials chemistry and physics, 2006. 98(2-3): p. 191-194
Online since: April 2016
Authors: Miloslav Pekař, Tereza Pilgrová
Interaction between cationic micelles and hyaluronan
PILGROVÁ Tereza1,a *, PEKAŘ Miloslav1,b
1Brno University of Technology, Faculty of Chemistry, Purkyňova 464/118, 612 00 Brno, CZ
axckrutisova@fch.vutbr.cz, bpekar@fch.vutbr.cz
Keywords: hyaluronan, micelle, nanoparticles, turbidimetry, dynamic light scattering.
However surfactants may have adverse effects on biological structures.
Thanks to this structure can solubilize water-insoluble molecules in their inner, essentially hydrophobic nature.
It is clear that micelle-hyaluronan complexes have different structure depending on length of hyaluronan chain that is a correlative of number of negative charge in the system.
Structural Chemistry, 20, 341-349 (2009)
However surfactants may have adverse effects on biological structures.
Thanks to this structure can solubilize water-insoluble molecules in their inner, essentially hydrophobic nature.
It is clear that micelle-hyaluronan complexes have different structure depending on length of hyaluronan chain that is a correlative of number of negative charge in the system.
Structural Chemistry, 20, 341-349 (2009)
Online since: January 2012
Authors: Rui Xin Chen, Ling Yan Xu, Chang Feng Sun
College of Chemistry and Molecular Engineering, Qingdao University of Science and T
echnology, Qingdao 266042, P.
Introduction Considerable effort has been devoted to the study of open-framework metal phosphates following the discovery of microporous aluminophosphates AlPO4-n in 1982 [1], owing to their interesting structural chemistry and potential applications in catalysis, absorbent, ion exchangers, and gas separation [2-5].
Structure determination.
The structure was solved in the space group Pccn by direct methods and refined on F2 by full-matrix least-squares using SHELXTL97 [19].
There are corner-sharing 4-membered ring chains propagating along [001] which can act as second building units in the structure.
Introduction Considerable effort has been devoted to the study of open-framework metal phosphates following the discovery of microporous aluminophosphates AlPO4-n in 1982 [1], owing to their interesting structural chemistry and potential applications in catalysis, absorbent, ion exchangers, and gas separation [2-5].
Structure determination.
The structure was solved in the space group Pccn by direct methods and refined on F2 by full-matrix least-squares using SHELXTL97 [19].
There are corner-sharing 4-membered ring chains propagating along [001] which can act as second building units in the structure.
Online since: September 2018
Authors: Sukon Phanichphant, Pusit Pookmanee, Chanchana Thanachayanont, Chabaiporn Junin, Khemmika Promwanna, Kanjanaporn Narong, Jirapat Ananpattarachai
The crystal structure was identified by X-ray diffraction (XRD).
A single phase of anatase structure was obtained without calcination steps.
TiO2 nanopowder was obtained without a calcination step and the structure was confirmed with the Joint Committee on Powder Diffraction Standards (JCPDS) Card File No. 21–1272 [11].
It was clearly seen that a single phase of anatase structure was obtained for all synthesis conditions.
A single phase of anatase structure of N-doped TiO2 nanopowder was obtained without calcinations steps.
A single phase of anatase structure was obtained without calcination steps.
TiO2 nanopowder was obtained without a calcination step and the structure was confirmed with the Joint Committee on Powder Diffraction Standards (JCPDS) Card File No. 21–1272 [11].
It was clearly seen that a single phase of anatase structure was obtained for all synthesis conditions.
A single phase of anatase structure of N-doped TiO2 nanopowder was obtained without calcinations steps.
Online since: June 2014
Authors: L. John Kennedy, J. Judith Vijaya, N. Mohamed Basith
John Kennedy3, c
1 Catalysis & Nanomaterials Research Laboratory, Department of Chemistry,
Loyola College (Autonomous), Chennai 600 034, India
2 Department of Chemistry, The New College (Autonomous), Chennai 600 014, India.
3 Materials Division, School of Advanced Sciences, Vellore Institute of Technology (VIT) University, Chennai Campus, Chennai 600 127, India
a basithchemist@yahoo.co.in, b jjvijaya78@gmail.com (corresponding author), cjklsac14@yahoo.co.in
Key words: Nanostructures; X-ray diffraction; Optical properties; Ferromagnetism.
The XRD patterns refined by the Rietveld method indicated the formation of single-phase monoclinic structure and also confirm that the Fe ions are successfully incorporated into the CuO crystal lattice by occupying Cu ionic sites.
Generally, the metal doping makes radical changes in the optical, electrical, and magnetic properties of CuO by altering its electronic structure.
Thus, the aim of the present study is to analyze the structure, microstructure, optical and magnetic properties of Fe-doped CuO nanostructures.
Structure (XRD and Rietvled analysis) and microstructure (SEM) of the as-prepared Fe-doped CuO powders were investigated and correlated to the optical and magnetic properties. 2.
The XRD patterns refined by the Rietveld method indicated the formation of single-phase monoclinic structure and also confirm that the Fe ions are successfully incorporated into the CuO crystal lattice by occupying Cu ionic sites.
Generally, the metal doping makes radical changes in the optical, electrical, and magnetic properties of CuO by altering its electronic structure.
Thus, the aim of the present study is to analyze the structure, microstructure, optical and magnetic properties of Fe-doped CuO nanostructures.
Structure (XRD and Rietvled analysis) and microstructure (SEM) of the as-prepared Fe-doped CuO powders were investigated and correlated to the optical and magnetic properties. 2.
Online since: February 2019
Authors: Himadri Shekhar Mondal, Md. Mehadi Hasan Mahasin, Md. Mahbub Hossain, Pankoj Kumar Mondal, Md. Ekhlasur Rahaman
Using
synthetic chemistry, it is possible to develop peptic and protein bio-sensor.
Although, different human antibodies have pentameric structure having an extra protein named J chain [33].
Typical biochemical examines were created for this where some types depend on nano-structured materials.
Reproduced with permission of Analytical and bioanalytical chemistry, Springer [52].
Rea, "Biosensing technology for sustainable food safety," TrAC Trends in Analytical Chemistry, vol. 62, pp. 1-10, 2014
Although, different human antibodies have pentameric structure having an extra protein named J chain [33].
Typical biochemical examines were created for this where some types depend on nano-structured materials.
Reproduced with permission of Analytical and bioanalytical chemistry, Springer [52].
Rea, "Biosensing technology for sustainable food safety," TrAC Trends in Analytical Chemistry, vol. 62, pp. 1-10, 2014
Online since: November 2011
Authors: Ying Hui Ren, Hai Xia Ma, Kang Zhen Xu, Jie Huang, Du Bei Zhang, Ji Rong Song
Synthesis and crystal structure of copper(Ⅱ) complex derived from N-(4,6-dimethylpyrimidin)-N’-(ethoxycarbonyl)thiourea
Yinghui Ren1, a, Haixia Ma1,b ,Kangzhen Xu1,c,Jie Huang1,a,
Dubei Zhang1,a,Jirong Song1,2,a
1School of Chemical Engineering, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Northwest University, Xi’an 710069, China
2 Conservation Technology Department, The Palace Museum, Beijing 100009
arenyinghui_ren@163.com, bmahx@nwu.edu.cn, cxukz@nwu.edu.cn
Keywords: synthesis; thiourea; crystal structure; copper(Ⅱ) complex
Abstract A new copper(Ⅱ) complex derived from N-(4,6-dimethylpyrimidin)-N’-(ethoxycarbonyl)
thiourea was synthesized.
A summary of crystallographic data and details of the structure refinements of the ligand[7] and the complex is listed in Table 1.
Conclusion A new copper (Ⅱ) complex was synthesized and its crystal structure was determinated by X-ray measurement.
A 1D chain structure forms by the intermolecular hydrogen bonds.
M.Sheldrick, SHELXT 97, Program for Crystal Structure Refinement, University of Göttingen, Germany (1997).
A summary of crystallographic data and details of the structure refinements of the ligand[7] and the complex is listed in Table 1.
Conclusion A new copper (Ⅱ) complex was synthesized and its crystal structure was determinated by X-ray measurement.
A 1D chain structure forms by the intermolecular hydrogen bonds.
M.Sheldrick, SHELXT 97, Program for Crystal Structure Refinement, University of Göttingen, Germany (1997).