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Online since: April 2012
Authors: Xiao Dong Hu, Ya Jiang Li, Sen Zhang, Yong Zhang
Specimen Preparation Zr R60702 is the main material for coal-chemistry machinery for acetic acid manufacture for its sole resistance properties.
Fig.1 Groove and testing schematic diagram (mm) Fig.2 Sample interception schematic diagram (mm) Weld microstructure analysis The structure analyzed in the weld joint includes base metal zone, heat-affected zone, fusion zone and weld seam zone with the optical microscope of 200 times magnification.
The fibrous and batten shape of columnar grain in the weld zone is depicted in Fig.8 as typical cast structure.
Online since: September 2013
Authors: Tao He
Generalized concept of inclusions affect the integrity gem minerals, all the features of homogeneity, not only narrow inclusions, but also the structural characteristics and gem minerals internal structure of the surface characteristics, and differences in physical characteristics, such as double crystal, ribbon, band structure, fracture, cleavage, etc.
Klabunde: Chemistry-A European Journal, Vol.8 (2002), p.3991
Online since: September 2007
Authors: Kazuo Arakawa, Tetsuo Takayama, Mitsugu Todo
Ltd) and PCL (CelgreenH7 ® Daicel Chemistry Industries Co.) pellets and LTI (Kyowa Co.
On the contrary, elongated structures are observed for both C10L and C20L.
Thus, PCL phase is well dispersed in PLA due to LTI addition and the entangled structure of PLA and PCL causes such ductile deformation.
Online since: June 2007
Authors: Hong Lae Sohn, Bong Ju Lee, Seung Hyun Jang
� Detection of Toxic Organophosphate Nerve Agents Using DBR Porous Silicon Chip Bong Ju Lee1 , Seunghyun Jang2 , and Honglae Sohn 2a 1Department of Physics, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501-759, Korea 2Department of Chemistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501-759, Korea a Corresponding author : hsohn@chosun.ac.kr Keywords: DBR(Distributed Bragg Reflector) Porous Silicon, Organophosphate compounds Abstract.
Results and Discussion Optical Structure of DBR PSi Chip.
This result indicates that the detection of organophosphonates using DBR PSi chips exhibits a couple of decades times better detection limits compared with single layer PSi (800 ppm of DFP for 5 min) [1] or Rugate structured PSi (31 ppm of DMMP for 1 min).[5] Conclusions This work demonstrates the detection of chemical nerve agents using DBR PSi.
Online since: January 2012
Authors: Yan He, Ya Jing Liu, Yong Lin Cao, Li Xia Zhou
Each molecular structure and component has its unique Ir spectrum, which can analysis and identification the structural [7].The solid samples, which were under different conditions, were determined by using infrared spectrometer, the infrared spectrum analysis of the results of detection was shown in fig. 2: 500 1000 1500 2000 2500 3000 3500 4000 4500 0 20 40 60 80 100 A B wavelengh Absorbance f)PH=9.24 500 1000 1500 2000 2500 3000 3500 4000 4500 0 20 40 60 80 100 A B Absorbance wavelengh e)PH=8.20 500 1000 1500 2000 2500 3000 3500 4000 4500 0 20 40 60 80 100 A B wavelengh Absorbance d)PH=7.46 Fig. 2 Infrared spectrogram of silica gel in different pH (a~f) Through the infrared spectrogram in the conditions of different pH value, the analysis showed that: (1) The strong absorption peak in about 1100 cm-1 was the opposition expansion vibration absorption of Si-O-Si
It should contribute on the development of new products to create a system of forms of silicic acid stabilization structure theory, and prolong the stable silicate to provide the theory basis.
Reference [1] Ds.W, Hx.S: Environmental chemistry, Vol. 16(1997), p. 515
Online since: May 2004
Authors: A. Aygün, S. Yenisoy-Karakaş, I. Duman
In addition, adsorptive capacities depend not only on the surface area but also the precursor and the pore structure of activated carbon, as well.
The Freundlich and the Langmuir isotherm constants for phenol and methylene blue adsorption Freundlich constants Langmuir constants Activated carbon Adsorbates kf N R2 Q0 (mg g -1) b (L mg -1) R2 Phenol 7.13 2.8 0.972 70.4 13.0×10-3 0.871 ACA Methylene blue 0.10 1.8 0.952 1.33 13.6 0.991 Phenol 8.67 2.6 0.996 100 7.10×10-3 0.971 ACW Methylene blue 0.29 1.8 0.971 3.53 1.21 0.958 Phenol 41.3 4.2 0.969 145 2.90×10-4 0.961 ACH Methylene blue 3.31 4.3 0.964 8.82 0.058 0.978 Phenol 28.2 3.8 0.980 126 9.40×10-4 0.968 ACAS Methylene blue 0.43 1.9 0.989 4.11 0.83 0.927 Although the some properties like surface area, carbon content of all activated carbons are not very much different from each other, phenol adsorption capacities differ probably due to differences in porosity, surface chemistry and precursors.
The higher iodine number values but relatively low methylene blue values for all carbons are the indication of the existing of highly developed microporous structure.
Online since: September 2013
Authors: Wen Tao Yi, Chun Yan Yan
Boron Adsorption by Cellulose supported layered double hydroxides Chunyan Yan1, a, and Wentao Yi1, b 1 Department of Chemistry and Chemical Engineering, Zaozhuang University, Zaozhuang, Shandong 277160, China; aqislycy@163.com, bqislywt@163.com Keywords: Preparation, Characterization, Carboxymethyl cellulose-supported layered double hydroxides, Adsorption, Boron Abstract.
However, some deficiencies such as unfirm structure, relatively poor chemical and thermal stability, and high cost gradually came to light.
With the introduction of interlayer anions into the LDHs, the layered structure, the composition, and the properties of LDHs can change accordingly, and many functional materials with special performance can be obtained.
Online since: December 2013
Authors: Jie Wang, Wei Wan
The determination of the structure of a gene of interest is a critical first step to understanding its structure and function and being able to manipulate, modify, or over express the gene product.
Karger, "Rapid DNA Sequencing of More Than 1000 Bases per Run by Capillary Electrophoresis Using Replaceable Linear Polyacrylamide Solutions," Analytical Chemistry, vol. 68, p. 3305-3313, 1996
Online since: September 2003
Authors: J. Huang, S.J. Xin, D.S. Jiang
Table 1 Solubility of CoPc-Fe3O4 nanoparticles composite ( the weight component of CoPc is 3%) solvent H2O HCl(1N) NaOH(6N) C2H5OH acetone acetic ether n-octane solubility insoluble soluble insoluble insoluble insoluble insoluble insoluble From the structure of CoPc[5] we can know that there are gaps between the CoPc combined on the surface of Fe3O4 nanoparticles.
If this device is connected into the structure system, the covibration of the system with vibration outside can be avoided.
Tsutsui: Coordination Chemistry Review, Vol. 32 (1980), p. 67
Online since: August 2013
Authors: Xiang Jian Meng, Yue Zhi Cui, Cong De Qiao, Tian Duo Li, Jing Xu
Viscosity of gelatin solution containing cationic crosslinker Xiangjian Meng, Yuezhi Cui a, Congde Qiao, Tianduo Li and Jing Xu Shandong Provincial Key Laboratory of Fine Chemicals, School of Chemistry and Pharmaceutical Engineering, Shandong Polytechnic University, Jinan 250353, China aCYZ@spu.edu.cn Keywords: binary quaternary ammonium salt, gelatin, viscosity, crosslinking.
Fig. 1 The structure of quaternary ammonium salt compound I-III Experimental Preparation of the Quaternary ammonium compounds I, II and III.
The molecule structures of these three compounds were characterized by 1H-NMR.