Search results

Preliminary Research on the Interaction between a Novel Designed Self-assembling Peptide with Half-Sequence Ionic Complement and the Natural Product Psoralen Lili Tang1, a, Fuyi Guan2,b and Daohang He*3,c 1,2,3School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China ahnlgtll@yahoo.cn, b fuyiguan@yeah.net, cdaohanghe@yahoo.com.cn (Corresponding author) Keywords: Self-assembling peptide, Psoralen, Nanostructure, Interaction Abstract.
This paper describes a new kind of 9-residue half-sequence ionic-complementary peptide P-X7-P, which can spontaneously self-assemble into well-ordered and long interconnected nanofibrilar network structure in pure water, and can be used as a hydrophobic compounds carrier.
The full-sequence ionic complement peptides have been studied the most, all of them are composed of alternating hydrophilic and hydrophobic amino acids throughout the entire peptide sequence to ensure a full range of ionic self-complementarity, which would tend to form the β-sheet structure and further self-assemble into three-dimensional nanofiber scaffolds in pure water, the hydrophobic amino acids point to one face of the sheet and the hydrophilic ones point to the other face, the amphiphilic peptides undergo self-assembly via predictable intermolecular interactions and may self-assemble into various nano-structure forms[6,7,8,9].
Moreover, the fibers were not straight but instead had many interconnected nanofibrilar network structures containing some branching nodes as well in water solution.
It is clearly seen that the dimensions and morphology of the complexes were different according to the peptide concentration from each other, these structures were very different from psoralen suspended in water (control).

The structure and miscibility of the nanocomposite materials were determined finely by viscosimetry, Fourier transformed infrared spectra (FTIR), micropolariscope (POM), scanning electron microscopy (SEM) and ultraviolet-visible spectrophotometer (UV-Vis).
From the point of template chemistry and nanobiology, some researches [4, 5] indicated that the SiO2 of biomineral autoassemble and synthesize nanometer SiO2 by intermolecular interaction force, such as the interaction of −OH in Si (OH) 4 and −OH in the polysaccharide.
The new structure and properties of SKC films made it possible that this nanocomposite had potential applications in optical and cosmetic fields and food package.
This phenomenon might support the conjecture that SKC sol formed an ordered structure gradually.
Progress in Chemistry (In Chinese) Vol. 11 (1999), p. 119 [5] Guo Z M, Wang L J and Chen X.

X-ray powder diffraction (XRD) measurement confirmed the formation of wurtzite-structured ZnO phase.
Thus, developing simple and facile ways to synthesize 3D hierarchical micro/nanostructures is very important to nanoscience, advanced nanodevices and synthetic chemistry.
The phase structure and purity of the as-prepared sample was characterized by XRD, as shown in Fig. 1.
All of the diffraction peaks can be indexed as the hexagonal ZnO phase (wurtzite structure) by comparison with the date from JCPDS Card File No. 36-1451.
Investigation on, then make clear the formation mechanism of nanostructures, in particular those with complex and hierarchical architectures, is an essential step toward realizing controllable synthesis of nanomaterials with tunable dimension and structure complexity.

Figure 3 shows a typical structure temperature contour, the temperature is uniform in the entire active area.
Figure 4 plots the input power versus maximum temperature rise of structure.
It is obvious that the stress adjustment layer can greatly reduce the thermal stress of the structure, from 4775MPa to 952MPa, because it can induce opposite force to weaken structure deformation.
The novel stress adjustment layer could minimize structure deformation and help reducing structure thermal stress.
Natural Gas Chemistry 20 (2011) 179-183

The results of all samples crystal structure analysis were shown on the XRD patterns of the JCPDS No. 89-6662 (Spodumene) with monoclinic structure.
Its structure is monoclinic.
· The crystal structure were determined by X-ray diffraction (XRD) on range 10°-70° of 2-theta, step size 0.05°/1 sec.
Crystal structure pattern from XRD spectrometer were observed of the JCPDS No. 89-6662 (Spodumene) with monoclinic structure all samples, but changing intensity were found in different dosed. 5.
Materials Chemistry and Physics, Vol. 87 (2004), pp 292–296.

Towards forming H bond in the short wave zone Cl− anion shows a strong effect on the coal molecular structure.
Coal is itself highly heterogeneous, macromolecular matrix and its concept of structures still not completely accurate.
In this work we are reporting experimental results of solvents affections on the structure of Baganuur coal, Mongolia.
[11] Kopylov N.I., Kaminskii Y.D., Dugarzhav Z., Avid B., Golovko A.K., Natrushev Y.V., Chemistry for Sustainable Development. 23 (2015) 39-47
Chemistry Physics. 4 (2018) 46-53

Characterizations of Plating Structures and Electromagnetic Shielding Properties of the Micron-sized Flaky Silver-coated Copper Powder Denggao Guan1,2,a, Chuanmin Sun2,b, Jinhui Lin1, Yao Sun2, Guanli Xu2 and Ting Lei2 1College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan, 610059, China 2College of Earth Sciences, Chengdu University of Technology, Chengdu, Sichuan, 610059, China agdg@cdut.edu.cn, bscm@cdut.edu.cn Keywords: electroless silver plating, plating structures, shielding effectiveness, electromagnetic shielding coating Abstract.
Its plating structures were characterized by XRD, SEM and EDS.
Flaky powders with two-dimensional planar structure and a large aspect ratio are increasingly being used in special function coatings in recent years because of their especial structures and excellent properties [11].
Characterizations of Plating Structures & Electromagnetic Shielding Properties.
Results and Discussion Plating Structure of Micron-sized Flaky Silver-coated Copper Powders.

Due to the large variety of the structure and structure of carbon and glass fillers, there is no unambiguous opinion about the preference of the method of processing their surface.
It all depends on the structure of the specific filler and polymer, with which it will continue to mix.
An analysis of the structure of the surface layers of various glass fibers shows [19] that their composition and structure differs significantly from the internal fibers, both during heat treatment and exposure to open air, due to possible chemical reactions with environmental components.
Chemistry, Moscow,1981
Chemistry, Moscow,1974

The corresponding coadsorption energies for these two final structures are 6.03 eV and 6.24 eV, respectively.
The most stable CO2 structure is the T-HN [Fig.4(b)] with a coadsorption energy of 6.93 eV.
Comparing with the total energy of a free CO2 and the clean relaxed Pt-skin Pt3Ni(111), the structures with a CO2 species (e.g. the T-HN, T-HP, T-FPPN structures) are higher in energy by 0.09 eV, 0.42 eV, 0.41 eV, respectively.
To this end, we performed a CI-NEB calculation [13] for the CO2 desorption from the T-HN structure with an end structure of a free CO2 in the middle of the vacuum layer.
Somorjai, Introduction to surface chemistry and catalysis, New York: Wiley, 1994

Crystal structure and electrochemical performances of the composite relates to the heat treatment temperature.
The composite synthesized under 700℃ is simple pure olive-type phase structure with relative uniformly distribution of particle size.
Since the pioneering study by padhi et al [1], LiFePO4, which has an orthorhombic olivine type structure, is of particular interest.
Morphology and structure analysis.
The crystallographic structure of the cathode powders was analyzed by X-ray diffraction (XRD) (Siemens D-500) with Cu Kα radiation.