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Shekhar2 1 Radiation and Polymer Chemistry Laboratory, Institute of Nuclear Science and Technology, Bangladesh Atomic Energy Commission, GPO Box: 3787, Dhaka 1000, Bangladesh. 2 Department of Biochemistry and Molecular Biology, Dhaka University, Dhaka, Bangladesh.
The structures of these materials, primarily composed of sugar and/or amino acid residues, are analogs of protein and growth factor structures in the human body that may be more relevant for stimulating the appropriate physiological responses required for cellular regeneration and tissue restructuring in wounds.
The viscosity of polymer solutions is an involved function of many interacting variables, such as molar mass, structure and conformation of polymer molecules, polymer concentration, polymer solvent interaction, solvent viscosity, and shear rate.

The final products are recorded as sample a1, a2 and a3. 2.2 Samples Structure Characterization Analyse the sample structure character and performance, using X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray spectroscopy (EDS) and uv-vis absorption spectroscopy (UV - vis). 2.3 UDMH Wastewater Degradation Under ambient conditions, take 100 ml of a certain concentration UDMH wastewater in a 200 mL beaker, then add a certain amount of ZnO powder, use ultrasonic disperse the sample for 3 min to get homogeneous solution in the dark place.
Results and discussions 3.1 X-ray diffraction (XRD) analysis Fig. 1 XRD chart of ZnO/Ag Fig.1 for sample ZnO/Ag X-ray diffraction pattern shows that samples contained only ZnO and Ag and ZnO diffraction peak fit standard map (JCPDF: 89-0510) ,the samples belongs to the Hexagonal wurtzite structure (space crystal group belongs to the P63mc (186)), point lattice constant a = b = 0.3249 nm, c = 0.5205 nm;Ag diffraction peak and standard map(JCPDF: 87-0717) anastomosis, space crystal group belongs to the Fm-3 m (225), point lattice constant a = b = c = 4.086 nm.
Journal of Solid State Chemistry, 182(2009):115-121

The atomic spin interaction is very important for understanding the superficially magnetic feature of nano-structure at atomic level.
This research is very important for developing FMR-MExFM and novel magnetic sensor, detecting the magnetic information, etc. 1 Introduction More and more researchers have paid attention to the magnetic feature of nano-structure on atomic level [1,2] and the detection of magnetic exchange force.
MExFM with the new principle needs develop on the aspects of theory and experiment, insuring the function of separating material surface topography and magnetic structure information.
Due to the magnetic effect between probe and surface and the short-range chemistry among atoms, as the probe is close to the sample surface, the frequency of the probe will change.

Montmorillonite, a smectite clay, is a natural clay minerals that has the ability to adsorb heavy metal ions from water due to its crystal structure and chemical features [6].
Smectite clays have high cation exchange capacity (CEC) because it can accommodate 33% cation substitution in their structure, making them of great interest in the removal of heavy metals.
In a similar study conducted by Wu et al. in 2015, unused montmorillonite also exhibited a much smoother surface while Fe-MMT obtained peculiar delaminated structures.
Turkish Journal of Chemistry 2002: vol.26, pp.409-416

Cu2O has a cubic crystal structure with a direct energy band gap of 2.1 eV [3] that is suitable as an absorber for ultraviolet (UV) light.
Because of the wide energy band gap of Cu2O, it can be applied to tandem structure solar cells.
CuO has a monoclinic structure with an indirect energy band gap of 1.4 - 1.7 eV [3] that is suitable as an absorber for visible and UV light.
Svensson, “Optical Analysis of a ZnO/Cu2O Subcell in a Silicon-Based Tandem Heterojunction Solar Cell”, Green and Sustainable Chemistry, vol.7, pp. 57-69, 2017 [5] S.

Besi, 57000 Kuala Lumpur, MALAYSIA 4Department of Chemistry, Centre for Foundation Studies, National Defence University Malaysia (NDUM), Kem Sg.
Lucian: Analysis of the chemical composition and morphological structure of banana pseudo-stem.
Borsali,: Rodlike Cellulose Microcrystals: Structure, Properties and Applications, Macromolecules Rapid Communications, Vol. 25 (2004), p. 771-787
Young: Cellulose Structure Modification and Hydrolysis, Wiley, New York (1986), ISBN 0471827614

For example, films with dense structure are good in solar cell application, where films that are porous are better for gas sensor [6].
We may suggest that this is due to the improvement of the crystalline structure by the annealing process.
Better crystalline structure allows easier movement of electrons in the thin films thus increases the conductivity.
Zhou, “Photocatalytic activity of nanometer TiO2 thin film prepared by the sol-gel method,” Materials Chemistry and Physics, vol. 69, pp.25-29, 2001 [5] Y.

Introduction Traditional micro-electro-mechanical systems (MEMS) technologies based on silicon manufacturing processes are not suitable for manufacturing three-dimensional (3D) structures in metals.
Ultra precision micro machining tools are the perfect marriage of micro machine and ultra precision machining technologies, with an important implication for the fabrication of three dimensional micro structured optical surface and micro complicated parts [8-10].
[7] D Huo, K Cheng: Experimental Investigation on Micromilling of Oxygen-free, High-conductivity Copper Using Tungsten Carbide, Chemistry Vapour Deposition, and Single-crystal Diamond Micro Tools.
[10] J Yan, Z Zhang, T Kuriyagawa: Fabricating Micro-structured Surface by Ssing Single-crystalline Diamond Endmill.

Photocatalysis involving chemistry, physics, materials, engineering and other disciplines, there are many issues to be further studied and resolved.
Currently, ionic liquids have been successfully applied to the preparation of inorganic nano-materials; a lot of inorganic nano-structured materials have been successfully prepared [11-15].
Experimental Catalyst characterization.The crystal structure of the product was analyzed by X-ray diffraction (XRD).
UV light 3. quartz glass reactor 4 .magnetic stirring apparatus 5. raising platform 6.entering air 7. exhaust Results and discussion The crystal structure and absorbance of the TiO2 which was prepared with different ionic liquids was analysized.

In the range between 560 cm -1 and 720 cm -1, the spectra are magnified by a factor of 20, in order to improve the visibility of the structure.
The spectrum at 6 K shows a pronounced absorption structure.
An assignment to a particular microscopic defect structure cannot be met on the basis of our IRspectroscopy results.
Choyke in: The Physics and Chemistry of Carbides, edited by R.