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Online since: August 2011
Authors: Bi Xi Zhang, Jing Song, Ying Ying Guan
In summary, the current research of the structure of production system mainly established entropy model of system structure and used the model to evaluate the degree of order of the system structure.
R represents the optimal structure order degree[7].
Figure 1 shows flow structure A.
Figure.2 shows the flow structure B after optimization.
If β=1-α, and when α=0.4028, RA=RB=0.1081, namely the two flow structures have no relative merits; when α>0.4028, the structure before optimization is better than that after optimization; When α<0.4028, optimized structure is better than the original structure before optimization.
Online since: June 2014
Authors: Jie Ding, Chun Miao Liu, Wang Bin Cheng, Xian Shu Liu
Analysis of adsorption Analysis of the structure and chemical properties of phenol and aniline.
The adsorption mechanism of coagulation removing phenol and aniline was studied, which may occur, from the structure and chemical properties of phenol and aniline.
The structure of phenol and aniline are: From the structure of phenol and aniline, it is clear that there is a lone pair of electrons in the structure, and the presence of lone pair of electrons provides the possibility of hydrogen bonding occurrence.
Modification of Activated Carbon by Means of Microwave Heating and Its Effects on the Pore Texture and Surface Chemistry[J] (In Chinese).
Central European Journal of Chemistry, 2009, 7(1): 79-82.
Online since: May 2011
Authors: Hui Qing Wang, Zi Qiang Shao, Shao Yi Lv
Using FT-IR, elemental analysis, TG, DMA, X-ray and other means, we compared the structure, degree of substitution, the crystallinity, thermal stability, dynamic mechanical properties, dielectric properties and acid and alkali resistance between the CECs by solvent method and traditional method.
Heterogeneous reactions of cellulose undergo from outside to inside layer, it is difficult for chemical reagents to enter the inner of crystal structured region, which prevents multi-phase reaction.
The CECs prepared by traditional method and solvent method show broad diffraction peaks at 20°, it means that cyanoethylation has destroyed cellulose structure greatly, which makes microcrystalline and amorphous structure.
Morooka,M.Norimoto and T.Yamada:Journal of Applied Polymer Science, Vol.32 (1986),p.3575 [12] Zhang Li Na, Cai Jie, Zhou Jinping.Chinese Patent 03128386.(2005) [13] Jinping Zhou, Qian Li,Yongbo Song, Lina Zhang: Polymer Chemistry Vol.1(2010),p. 1662 [14] Charles W.
:Fibric Chemistry, Vol.2 (2000),p.100 [22] Guowen Luo, Xiaoleijinna.
Online since: November 2011
Authors: Li Hua Liu, Bo Li, Jing Cao
Synthesis of Lignin-based dithiocarbamate and Its Performance in Pb2+ Removal Lihua Liu1,a, Jing Cao1.b, Bo Li1.c 1Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education and Hunan Province, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan Province, P.R.China aemail: liulihualj@sina.com.cn, llh213@163.com, bemail: caojing702@163.com, cemail:364390063@qq.com Keywords: Lignin-based dithiocarbamate; Synthesis; Lead wastewater; Removal rate Abstract.
The structure of LBDTC was characterized by FTIR and elementary analysis, and its removal performances towards Pb2+ were investigated.
Therefore, it is necessary to modify the structure of lignin to enhance its removal ability to heavy metals from wastewater.
The structure of LBDTC was characterized by FTIR and elementary analysis.
Conclusions Lignin-based dithiocarbamate (LBDTC) was successfully prepared by introducing dithiocarbamate group into the structure of lignin.
Online since: October 2014
Authors: Bin Nie, Yi Feng, Ju Quan Zhang, Xiang Zhou, Ya Fen Wu, Zhi Yong Liu, Gen Hua Zhu, Yao Kun Xiong
The purities of the separated components as determined by high-performance liquid chromatography were 93%, and the combination of ESI-MS and NMR analyses confirmed the chemical structures of the three compounds.
Chemical structures of ferulic acid (I), senkyunolide I (II) and senkyunolide H (III).
Its structure was confirmed by comparing its mass spectrum (MS) and nuclear magnetic resonance (NMR) profile with those published in the literature [19, 20].
Food chemistry,2009,115(3):1158-1163
Isolation and structures of three new ligustilide derivatives from Angelica acutiloba, Chem.
Online since: September 2020
Authors: Farah Amanina Mohd Zin, Wan Mohd Faizal Wan Ishak, Seong Wei Lee, Nor Hakimin Abdullah, An'amt Mohamed Noor, Nurul Akmar Che Zaudin, Khairul Nizar Syazwan Salihin Wong, Mohd Shaiful Sajab, Mohammad Khairul Azhar Abdul Razab
Nanometer-sized AgNPs (an average diameter of about 70 nm) with spherical-shape structure loaded on the GO Alginate layer showed a good antibacterial towards E.Coli and Methicillin-resistant Staphylococcus aureus (MRSA).
It can been seen from the image the rough surface structure that can be seen suggesting that the AgNPs was deposited on the surfaces of cellulose covered with GO through π–π interaction between AgNPs and GO [10, 11], cellulose and alginate.
The properties of high surface area of GO contributed more space for the Ag to grow without aggregation due to the presence of GO layer.The present of Alginate cellulose also support the thin layer of GO by strengthen the structure hence stabilize of its high surface area.Fig. 3 B show the final product of thin film AgGO cellulose Alginate composite.
Hybrid Polymer Composite Materials: Structure and Chemistry. 19 (2017) 1213
Chemistry of Materials. 14 (2002) 2004-2010
Online since: March 2016
Authors: Masayoshi Umeno, Makoto Takahashi, Ajinkya G. Nene, Koichi Wakita
Nanoparticles are characterized for their size, crystallinity and crystal structure, elemental analysis for impurities (if any), and presence of any additional oxide phases – by SEM and TEM, XRD, EDAX and XPS spectroscopy, respectively. 1.
Magnetite (Fe3O4) crystal has an inverse spinel structure with alternating octahedral and tetrahedral layers which shows magnetic and electrical properties because of transfer of electrons between Fe2+ and Fe3+ ions present in octahedral sites [6].
All the peaks in Figure (5) can be indexed as pure Fe3O4 phase with inverse spinel structure and matched well with the reported data (JCPDS:65-3107).
Xiaohe, Controlled synthesis and characterization of monodisperse Fe3O4 nanoparticles, Chinese Journal of Chemistry. 27 (2009) 739-744
Othman, Radiolytic formation of Fe3O4 nanoparticles: Influence of radiation dose on structure and magnetic properties, PLOS ONE. 9 (3) (2014) 1-8
Online since: April 2013
Experienced scientists and young researchers, experimentalists and theoreticians in different fields of chemistry and physics, technology and engineering had a forum for direct and unimpeded discussion of their results and new trends, exchange of knowledge and ideas, joining their efforts in collaboration and multidisciplinary research.
It consists on the following chapters: Technology of the active media for electronic engineering; Active media fundamentals: crystal structure, micro- and nanostructure, electronic structure; Nanoparticles, nano-ceramics and nano-composites; Materials for quantum and optoelectronics, defects, impurities and transport phenomena; Magnetic properties, superconductivity and applications; Materials for sensing.
Online since: July 2013
Radiation damage latent tracks in solids find applications in nuclear and elementary particle physics, chemistry, radiobiology, earth sciences, nuclear engineering, and a host of other areas such as nuclear safeguards, virus counting, ion track filters, uranium exploration and archaeology.
The effect of various radiations in a polymer is more complex and intense, compared to that in other materials, in view of the more complex structure and low bonding energies.
In Chapter 6, Zagorskiy et al. discuss "Ion Track Matrices: Porous Structure, Deposition of Metals and Emission Properties of Obtained Replicas".
Online since: March 2004
Authors: Hyoun Woo Kim
Not only the gas chemistry affected the Ru etching, but also the higher bias power and argon (Ar) bombardment helped to faciliate the Ru etching.
The sample structure was Si substrate/ TiN 600 � / Ru 4000 � / SiO2 mask 2000 � .