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Online since: November 2011
Authors: Yong Le Liu, Fa Xiang Wang, Jian Yu, Qin Yun Wang
Prediction of the tertiary structure of α-glycosidase from Aspergillus niger by homology modeling
Fa-Xiang WANG 1,a, Qin-Yun WANG 2,b, Yong-Le LIU 1,c,* , Jian YU 1
1 College of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, P.
So, based on the restraints derived from the coordinate sets of these known structures, the tertiary structure of those a-glucosidases without investigation can be analyzed by homology modeling.
Results and Discussion Overall Structure.
The three-dimensional structure of the modeled protein was shown in Fig.1.
PROSA calculates an overall quality score for a specific input structure.
So, based on the restraints derived from the coordinate sets of these known structures, the tertiary structure of those a-glucosidases without investigation can be analyzed by homology modeling.
Results and Discussion Overall Structure.
The three-dimensional structure of the modeled protein was shown in Fig.1.
PROSA calculates an overall quality score for a specific input structure.
Online since: November 2013
Authors: Xin Min Min, Hai Xia Yang, Hong Fei Liu
Introduction
The reaction of transition metal ions with hydrocarbons represents one of the most active research areas in contemporary gas-phase ion chemistry.
A variety of fundamental thermodynamic, kinetic, and mechanistic information about gas-phase organometallic chemistry has been obtained from these studies.
This fairly good agreement at least partially validates our theoretical approach to the electronic and geometric structures of the species.
Fig. 2 are some selected structures along the reaction pathway.
The stable precursor of the decarbonylation products CH4 and Ni+2 (CO) has a structure of (CH4) Ni+2 (CO) rather than (CH3)H Ni+2CO), while the later islocated as a transition structure.
A variety of fundamental thermodynamic, kinetic, and mechanistic information about gas-phase organometallic chemistry has been obtained from these studies.
This fairly good agreement at least partially validates our theoretical approach to the electronic and geometric structures of the species.
Fig. 2 are some selected structures along the reaction pathway.
The stable precursor of the decarbonylation products CH4 and Ni+2 (CO) has a structure of (CH4) Ni+2 (CO) rather than (CH3)H Ni+2CO), while the later islocated as a transition structure.
Online since: March 2013
Authors: Sheng Qian Ma, Man Hong Fan
The main characteristics of the system are simple circuit structure, small volume, high degree of automation, and strong reliability, and it greatly improves the anti-interference performance of the circuit.
The platform of OK6410 embedded development system The circuit of gain control The circuit of data acquisition The circuit of potential instrument Program controlled voltage source Spectrometer Computer The system designs micro current detecting circuit on the platform based on OK6410 embedded development system, collecting weak current signal with high precision ADC, automatic adjusting circuit gain, real-time changing spectrometer wavelength size, simple circuit structure, improving the anti-interference performance of the circuit, and the collected signals curve fitting, more intuitive describing the relation of the SECM micro current and spectrometer wavelength.
Journal of Physical Chemistry B, 1998, 102(49): 9915-9921
Analytical and Bioanalytical Chemistry ,2006,(03): 458-471
Analytical Chemistry,1995, 67(19): 3578-3582
The platform of OK6410 embedded development system The circuit of gain control The circuit of data acquisition The circuit of potential instrument Program controlled voltage source Spectrometer Computer The system designs micro current detecting circuit on the platform based on OK6410 embedded development system, collecting weak current signal with high precision ADC, automatic adjusting circuit gain, real-time changing spectrometer wavelength size, simple circuit structure, improving the anti-interference performance of the circuit, and the collected signals curve fitting, more intuitive describing the relation of the SECM micro current and spectrometer wavelength.
Journal of Physical Chemistry B, 1998, 102(49): 9915-9921
Analytical and Bioanalytical Chemistry ,2006,(03): 458-471
Analytical Chemistry,1995, 67(19): 3578-3582
Online since: December 2014
Authors: Bing Hua Yao, Qin Ku Zhang, Cai Ling Zhang, Xiu Ping Han
Department of Applied Chemistry, Xi’an University of Technology,Xi’an 710054,China;
2.
Its structures and morphologies had been investigated by X-ray powder diffraction (XRD), scanning electron microscopy (SEM).
The diffraction peaks of the sample were very narrow and sharp indicating that the BaSb2O6 hierarchical structures possessed high crystallinity.
Huang: Physical Chemistry Chemical Physics, Vol. 11 (2009) No. 43, p.10047
Carvalhob: Materials Chemistry and Physics, (2013) No. 119, p. 418
Its structures and morphologies had been investigated by X-ray powder diffraction (XRD), scanning electron microscopy (SEM).
The diffraction peaks of the sample were very narrow and sharp indicating that the BaSb2O6 hierarchical structures possessed high crystallinity.
Huang: Physical Chemistry Chemical Physics, Vol. 11 (2009) No. 43, p.10047
Carvalhob: Materials Chemistry and Physics, (2013) No. 119, p. 418
Online since: January 2010
Authors: Yoshio Bando, P.M.F.J. Costa, U.K. Gautam, D. Golberg, Paulo B. Cachim
The enthusiastic drive has led a series of groups to explore filling the void
interior of the nanotubes and subsequently study the encapsulated materials structure and chemistry
[10-12].
The slenderness ratio (length/radius) of this structure was therefore 25.
Green: Chemistry of Materials, vol. 17 (2005), p. 3122-3129 [12] P.M.F.J.
Green: Chemistry of Materials, vol. 17 (2005), p. 6579-6582 [13] P.M.F.J.
Green: Journal of Physical Chemistry B, vol. 110 (2006), p. 13848-13857 [15] U.K.
The slenderness ratio (length/radius) of this structure was therefore 25.
Green: Chemistry of Materials, vol. 17 (2005), p. 3122-3129 [12] P.M.F.J.
Green: Chemistry of Materials, vol. 17 (2005), p. 6579-6582 [13] P.M.F.J.
Green: Journal of Physical Chemistry B, vol. 110 (2006), p. 13848-13857 [15] U.K.
Online since: February 2021
Authors: Mundher Al-Shakban, Naktal Al-Dulaimi, Thokozani Xaba, Ahmad Raheel
In this paper we report the crystal structure of diphenyltin bis(n-propylxanthate) [Ph2Sn(S2COnPr)2].
(a) Crystal structure of diphenyltin bis(n-propylxanthate) [Ph2Sn(S2COnPr)2], H are omitted for clarity.
The structure of the complex is discribed as a distorted tetrahedral arrangement.
Thin film solar cell of SnS absorber with cubic crystalline structure.
Crystal structure of bis (O-isopropyldithiocarbonato)-diphenyltin (IV).
(a) Crystal structure of diphenyltin bis(n-propylxanthate) [Ph2Sn(S2COnPr)2], H are omitted for clarity.
The structure of the complex is discribed as a distorted tetrahedral arrangement.
Thin film solar cell of SnS absorber with cubic crystalline structure.
Crystal structure of bis (O-isopropyldithiocarbonato)-diphenyltin (IV).
Online since: August 2012
Authors: Lu Li, Ruo Song Li, Tao Fang
Producing Microporous PMMA with
Supercritical CO2 and the Research on Its Properties
Ruosong Li1, a, Lu Li2, b, Tao Fang3, c, *
1, 2, 3Department of Chemistry Engineering, Xi’an Jiaotong University, Xi’an 710049, China
1E-mail: liruosong.123@mail.xjtu.edu.cn, 2E-mail: lukey002@mail.xjtu.edu.cn,
3, *E-mail: taofang@mail.xjtu.edu.cn
Key words: MPF; PMMA; Supercritical CO2; Microporous structure; Mechanical properties
Abstract.
The microporous structure was observed by scanning electron microscope (SEM).
Cellular diameter and density were mainly used to characterize the structure of MPFs.
Moreover, the structure, feature and mechanical properties of MPFs were characterized.
Wang, Preparation of microporous material of polymer blends by supercritical CO2 technology, Institute of Chemistry, 2 (2001).
The microporous structure was observed by scanning electron microscope (SEM).
Cellular diameter and density were mainly used to characterize the structure of MPFs.
Moreover, the structure, feature and mechanical properties of MPFs were characterized.
Wang, Preparation of microporous material of polymer blends by supercritical CO2 technology, Institute of Chemistry, 2 (2001).
Online since: March 2007
Authors: P.C. Sun, D.T. Ding, Y.P. Liu, Z.R. Shen, L.Y. Li, Zhong Yong Yuan, Tie Hong Chen, B.H. Li
Ding
College of Chemistry and College of Physics, Nankai University, Tianjin 300071,China
chenth@nankai.edu.cn
Keywords: Biomimetic synthesis; Nanoporous silica; Block copolypeptide; Organic gel system; π-
π interaction
Abstract.
FT-IR spectra reveals that there exists nanoporous structure in the calcined sample.
Recently, Shantz et al. reported the precise control over the micropore architectures of silica by the polypeptide secondary structure α-helix and β-sheet [6].
The π-π interaction between organic template molecule and inorganic precursor has been proved effective for good morphology and structure formation [12,13].
Yu et al. : Chemistry-Zeolites and Porous Materials,(Science Press,China 2004)
FT-IR spectra reveals that there exists nanoporous structure in the calcined sample.
Recently, Shantz et al. reported the precise control over the micropore architectures of silica by the polypeptide secondary structure α-helix and β-sheet [6].
The π-π interaction between organic template molecule and inorganic precursor has been proved effective for good morphology and structure formation [12,13].
Yu et al. : Chemistry-Zeolites and Porous Materials,(Science Press,China 2004)
Online since: May 2016
Authors: Besim Ben-Nissan, Innocent J. Macha, David Grossin
Marine structure, coralline materials were converted to calcium phosphate using two different phosphate solutions.
The potential applications of natural biogenic materials such as marine structures can be easily overlooked due to the environmental concerns.
Corals have porous structure with pores size ranges from 150 to 500 μm similar to cancellous bone and form chemical bonds with bone and soft tissue in vivo [1].
It is expected that impurities and the amount of the material used for conversion are the additional factors to influence the morphology and structure.
Posner, Formation of hydroxyapatite at low supersaturation, The Journal of Physical Chemistry, 80 (1976) 40-45
The potential applications of natural biogenic materials such as marine structures can be easily overlooked due to the environmental concerns.
Corals have porous structure with pores size ranges from 150 to 500 μm similar to cancellous bone and form chemical bonds with bone and soft tissue in vivo [1].
It is expected that impurities and the amount of the material used for conversion are the additional factors to influence the morphology and structure.
Posner, Formation of hydroxyapatite at low supersaturation, The Journal of Physical Chemistry, 80 (1976) 40-45