Search results

Micrograph of the samples after sintering process shows the microstructure of bright-circle structures, equiaxed structures, plate-like structures and pores.
The results show that the alloy has α+β phase, as indicated by formation of equiaxed structures and needle-like structures.
In 0.6 ks-sintered sample (Fig. 2a), needle-like α structure and equiaxed β structure began to be formed.
Furthermore, needle-like α structures were formed far from the bright-circle structure, while the equiaxed β structures were shown in the vicinity of the bright-circle structure (Fig. 2b).
[15] Peter Atkins, Julio de Paula, Physical Chemistry, eight ed., Oxford University Press, 2006

Preparation, Characterization and Catalytic Activity of Sulfated Zirconia by Varied Sol-Gel Method Is Fatimaha, Zulfa Zuhrufa Chemistry Department, Universitas Islam Indonesia Kampus Terpadu UII, Jl.
One of these is sol-gel synthesis by using surfactant as template molecule to create certain pore size and porous structure.
From Fig. 1 it can be noted that S/Zr-CTAB expresses the flaky structure compared to S/Zr-urea.
The rougher structure of the surface is in line with the specific surface area and pore volume data tabulated in Table 2 while the adsorption-desorption profile is depicted in Fig. 2.

Formulation optimization of ASP with mixed surfactants Performance research of Rhamnoilpid The molecular weight of rhamnoilpid is about 533, the molecular structure is shown in Fig.1, the density of rhamnoilpid fermentation liquid is around 0.9994g/cm3, basically identical with water, and the viscosity is 0.681mPa.s, and its appearance is dark white powder.
Rhamnoilpid has good structure stability, only can hydrolyze under the condition of 120˚C and strong base (ph≥14).
Fig.1 Molecular structure of rhamnoilpid ASP with only bio surfactant of rhamnoilpid has a interfacial tension of 8.23mN/m under TVT2 test in door, while the error range is 0.51mN/m, so the interfacial tension of ASP with only bio surfactant of rhamnoilpid can not reach the magnitude of 10-3mN/m.
References [1] Jiecheng Cheng, Demin Wang, Qun Li: Acta Petrolei Sinica. 2002, 23(6) (in Chinese) [2] Junde Zheng, Yingzhi Zhang, Hua Ren: Oilfield Chemistry. 2004,31(3) (in Chinese) [3] Qingguo Wang, Hairong Fu: Well Testing and Production Technology. 2003, 24(1) (in Chinese) [4] Shi Y, Yang Z M and Huang Y Z.

The field is inherently interdisciplinary, with strong connections to physics, chemistry, biology and the engineering fields.
Materials scientists tackle such problems as the discovery of efficient electrolytes and electrodes for batteries and fuel cells (for sustainable energy), the design of nanoscale structures that can use light for communication (photonics), and the fabricat- ion of high strength metals free of traditional failure modes (bulk metallic glass).
The basis of materials science involves relating the desired properties and relative performance of a material in a certain application to the structure of the atoms and phases in that material through characterization.
The major determinants of the structure of a material and thus of its properties are its constituent chemical elements and the way in which it has been processed into its final form.

Preparation of ZnAc/PVP Composite Fibers and ZnO Nanofibers Qingnan Zhang1, a, Dongyan Tang2,b *, Zaiqian Yu3,c and Haitao Lv4,d Department of Chemistry, School of Science, Harbin Institute of Technology, Harbin150001, China aqingnan1988@126.com, bcorresponding author, dytang@hit.edu.cn, cyuqian0105@163.com, dlvhaitao0532@163.com Keywords: Zinc acetate(ZnAc), Zinc oxide(ZnO), Polyvinyl pyrrolidone(PVP), Electrospinning, Nanofibers.
At present, various ZnO nano structures, such as nanowires, nanorods[2] and nanobelts[3] have been synthesized through different kinds of preparation methods.
The crystalline structure including the phase purity was examined by X-ray diffraction(XRD).
The phase and structure of ZnO nanofibers were investigated by XRD.

Introduction An important scientific and technological challenge in analytical science deals with the development of sensors and their applications in areas such as environmental monitoring, biotechnology, medical diagnostics, drug screening, food safety...[1] Sensors with optical detection method have been largely discussed in the literature including fluorescence spectroscopy, interferometry, spectroscopy of modes guided in optical waveguide structures and surface plasmon resonance spectroscopy. [2-4] Surface engineering involves the modification of materials at the molecular scale to design interface with well-defined surface functionality providing advanced physical and (bio)chemical properties.
The layer-by-layer or LbL self-assembly method allows fabricating molecularly controlled ultrathin multilayer films through the alternate deposition of polycations and polyanions from solution. [5] By controlling the solution parameters, surface charges, and polymer combination, various supramolecular structures have been developed.
Compared with conventional covalent chemistry, the cyclodextrin-based sensing layer made with this self-assembly method presents the advantage of easy control of the layer thickness and the ease of surface regeneration. [6] Experimental The electrostatic self-assembled film deposition method is based on the electrostatic attraction between oppositely charged molecules in each monolayer deposited, and involves several steps.
Results and discussion The strategy we proposed for the chemical functionalization of optical fiber with cyclodextrin cavities takes advantage of the negatively charged nature of the fiber surface at pH value above 3 to generate multilayer assemblies through the initial deposition of high molecular weight polyethyleneimine with branched structure acting as anchoring layer.

Shape and structure of dynamic FP model FP process flow diagram is shown in Fig. 1 [2].
Mathematical model building technique FP process flow diagram has rather a complex structure and consists of a large number of heterogeneous components.
For the calculation of such systems it is necessary to build a mathematical model that represents a set of mathematical relations describing the system structure and the basic properties of the components.
Franks, Mathematical modeling in industrial chemistry, Khimiya, Moscow (in Russia), 1971

Jadambaa Temuujin1, a *, Claus Ruescher2,b , Amgalan Minjigmaa1, Burenkhangai Darkhijav1, Batmunkh Davaabal1, Bat-Erdene Battsetseg1 1 Institute of Chemistry and Chemical Technology.
Appearance of the phosphate leads us to the assumption that the efflorescence composition will also depends on the composition of used fly ash whether they have soluble reactive components within the structure or not.
Probably at air temperature curing the reactivity of the calcium in the fly ash was not enough to form calcium containing compound within the concrete structure, but delivers to the surface with the alkaline liquids to form gaylussite.
Mineralogical characterization of efflorescence allows understanding of geopolymerization reaction within the concrete structure.

As alumina pellets are added to the burner in 20mm increments, both the flame height and structures changed.
One can observe that, from flame color aspect, when the burner is empty or the height of packing bed is small, methane and air premixed degree may be very poor, the flame heights and flame structures are very similar to that of diffusion combustion in free space.
We also reconstruct the flame structure form upper surface of the packed bed.
Detailed chemistry modeling of laminar diffusion flames on parallel computers, Int.

Primitively, the structure of the cover, we thought, should be planar electrodes, and in bottom, it presented an array of point electrodes, as shown in figure1.
Thus we put this approach into use. 4 Further discussions of the device The structure also possess a advantage that not only the holes perforated expose the point electrode by utilizing SU-8, but it can serve as the holes to get cells stuck, as shown in figure5.
It is indeed an effective structure.
Analytical Chemistry, 2007, 79(20):7761 –7766