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Pokol 4 1Roumanian Academy, Institute of Physical Chemistry "I.
Unirii, 74204 Bucharest, Romania 4 Budapest University of Technology and Economics, Institute of General and Analytical Chemistry, Szt.
XRD data evidence for the PMN composition, thermally treated at 1200ºC (Fig. 2a), the presence of the phase with perovskitic structure.
Its effect on the increasing of the ordering range of the perovskitic structure in A(B'B")O3 type compounds is also pointed out.
At 1200ºC, the ordering effect is emphasized also, by the value of the unit cell parameter, a = 8.05 Å, doubled compared to a normal perovskite structure.

In the central part of a particle the structure is close to CeO2, near the surface the structure belongs to Ce2O3 [1].
That is consistent with the data [1], and suggests a slight difference between the structure of the particles near the surface and the stoichiometric structure of CeO2.
Sato, Cerium oxide for sunscreen cosmetics, Journal of Solid State Chemistry. 171 (2003) 7-11
Koshizaki, Preparation of metal oxide-based nanomaterials using nanosecond pulsed laser ablation in liquids, Journal of Photochemistry and Photobiology A: Chemistry. 182 (2006) 335-341
Gua, A surfactant and template-free route for synthesizing ceria nanocrystals with tunable morphologies, Journal of Material Chemistry. 20 (2010) 7776-7781

Biosorbent from Chinese Cabbage (Brassica pekinensia L.) for Phenol Contaminated Waste Water Treatment Anita Alni1,a*, Kana Puspita2,b and Muhammad Ali Zulfikar3,c 1Division of Organic Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesa 10 Bandung, Indonesia 2Division of Organic Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesa 10 Bandung, Indonesia 3Division of Analytical Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesa 10 Bandung, Indonesia aalni@chem.itb.ac.id, bkana.puspita@gmail.com, czulfikar@chem.itb.ac.id Keywords: phenol, Brassica Pekinensis L, Adsorption, epichlorohydrine, Abstract.
Biosorbent 3 showed the roughest surface due to the collapsing of macromolecules structure due to hydrolysis of hemicellulose and lignin which present in significant amount in the biosorbent materials. 2.
Crini, “Non-Conventional Adsorbents for Dye Removal,” in Green Chemistry for Dyes Removal from Waste Water: Research Trends and Applications, 2015
Pereira, “Adsorption of anionic and cationic dyes on activated carbons with different surface chemistries,” Water Res., 2004

This is due to a hole in the center of crown ether macrocyclic structure, and the size varies with the number of (CH2CH2O)n units.
Crown ether is widely used in metal ion extraction, phase transfer catalysis, ion carrier chemistry and other fields with the special selective coordination ability [10].
By coupling up the crown ether chemistry and coal chemistry, the alkali and alkaline earth metal metal in Zhundong coal are removed except sodium, providing basic data for the preparation of Zhundong coal only with the inherent water soluble sodium.
Wang, et al, Theoretical study on supramolecular chemistry of alkali-metal cations with crown ether derivatized thiophenes, J.
Wu, Crown Ether Chemistry, The Science Publishing Company, 1992, 114-140

PI initially possesses two chemical structures, Aromatic and Quinoid, the PI film undergoes transformation when exposed to ultraviolet light.
Due to its simple structure, organic resistive optical memory aligns more closely with contemporary technological needs compared to organic photomemory.
Results and Discussion Polyimide (PI) is a polymer organic material known for its photosensitivity owing to its Aromatic ring structure [5].
The Journal of Physical Chemistry Letters, 9(6), 1318-1323
Chemistry of materials 17.23 (2005): 5610-5612

And the dynamic mechanical properties of PU elastomers would be variable with different polyol structure, isocyanate structure and content or chain extenders.
Figure 2 Structural formulas of different diisocyanates The reason may be the different structure of different diisocyanates (as shown in Figure 2).
Conclusion The different structure of the diisocyanates, the different of the dynamic mechanical properties of PU elastomers.
Journal of Polymer Science Part A: Polymer Chemistry, Vol. 29, (1991) 739-747 [4] Y.
Macromolecular Chemistry and Physics, Vol. 202, (2001), 2538-2546 [10] GB 9870-88 Elastomers-General requirements for dynamic testing (Chinese)

The availability of significant functional groups in the extracted Na-ALG is about the alginic acid molecular structure and, thus, also validated by employing a library search (Fig 1c).
This indicates the build-up of ordered and disordered structures within the polymer chains.
For the relation of alginate dosage to %removal, a direct relation was observed due to increased available binding sites on its structure.
Wiraningtyas: The Journal of Pure and Applied Chemistry Research, 8(1), 23-30, (2019)
Hung Hu: Journal of Materials Chemistry A, (2022) [18] C.E.R.

Many applications to material science were identified, such as the following: the determination of defect distributions at the surfaces and interfaces of semiconductors and thin metallic films; the measurement of electron momentum distributions in metals, alloys, and oxide superconductors; surface structure determinations by slow positron diffraction and positron stimulated Auger electron spectroscopy; polymer free volume assays using lifetime and Doppler broadening spectroscopy; positron microscopy and microprobe measurements; catalysis studies; positron and positronium chemistry.

The volume is organised into three chapters, each dedicated to a key area at the intersection of materials science, chemistry, and sustainability.
Chapter 2: Sustainable Building Materials presents advances in green building materials, designed to consider environmental requirements and ensure both the durability of structures and production efficiency.

., Tomsk, 634050, Russia a belyaev@tpu.ru, b martjushev@tpu.ru, c belyaev@tpu.ru Keywords: lubricant, nanoparticle, secondary structure Abstract.
Introduction Creation of new lubricants is one of the priorities in the development of material science and colloid physics and chemistry [1, 2].
An examples of secondary structures formation The discovery of “selective transfer” effect in the second half of the 20th century by D. 
As can be seen from Fig. 3b the structure is layered.
[19] H.Shi, X.Fu, X.Zhou and Z.Hu, Preparation of organic fluids with high loading concentration of Ag2S nanoparticles using the extractant Cyanex 301, Journal of Materials Chemistry. 16 (2006) 2097–2101