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The tunnel polymorphs of pyrolusite (β-MnO2, rutile structure type), ramsdellite (diaspore structure type), hollandite (α-MnO2,hollandite structure type) and etc. have sequential increase of MnO6 octahedrons number filling the tunnel walls: 1´1, 2´1, 2´2 and etc.
Wells; Structural Inorganic Chemistry, Oxford University Press, Oxford, 1984
Makeeva, High-performance manganese oxide catalysts for CO oxidation,Russian journal of applied chemistry 75 (2002) 1420-1423 [8] H.C.
Makeeva Comparative Characteristics of Chemical Power Cells Based on MnO2-Zn Systems with Various Manganese Dioxide Samples,Russian Journal of Applied Chemistry 75 (2002) 935-938
Solid State Chemistry, 23(1995) 101—105

This allows the use of membrane with more open pore structures that provide high flow rates and high retention.[1-5].
Key applications of such filters (Intercept® ) are in POU recirculation etch baths using HF and Buffered oxide etch chemistries.
Process details and Experimental The test equipment used for the study is a standard AKRION GAMA™ Wet-bench with capability for HF, SC1, and SC2 chemistries in recirculation baths.
The chemistries evaluated are 0.46% dilute HF and SC1.
• The impact of batches on the particle level of bathes with aged chemistries is reduced.

XRD patterns confirm that the NiFe2O4 samples belong to the cubic structure and the CoFe2O4 samples are the rhombohedral structure.
This indicates that the NiFe2O4 nanoparticle is cubic structure.
This indicates that the CoFe2O4 nanoparticles belong to rhombohedral structure.
The CoFe2O4 samples have the rhombohedral structure.
Ni: Progress in Chemistry Vol. 21 (2009), p. 880 [4] J.L.

ZnO was characterized for its morphology, structure and optical properties using FESEM, EDS, UV-Vis and XRD.
The characterization of nanomaterial such as morphology, crystal structure, purity, size and size distribution, chemical composition, surface area, surface properties, stability, surface reactivity, surface chemistry and surface charge may be affected the toxicity [6-7].
There were varieties of morphology found in the ZnO sample including rod-structure, platelet structure, slab and irregular-shaped particles.
Figure 2: Bandgap energy of ZnO The XRD pattern of ZnO is posted in Figure 3 and it confirmed that ZnO has a wurtzite structure based on diffraction patterns (100), (002), (101), (102), (110), (103), (200), (112) (201), (004) and (202).
Anders, Cytotoxicity of ZnO Nanoparticles Can Be Tailored by Modifying Their Surface Structure: A Green Chemistry Approach for Safer Nanomaterials, ACS Sustainable Chemistry & Engineering, 2014;2(7):1666-1673. doi:10.1021/sc500140x

Based on the First-principles and the method of quantum chemistry calculations, using the B3LYP method and 6-31G basis set of the density functional theory(DFT), the configurations and binding energy of Nen (n=2~36) clusters are calculated and studied theoretically after the calculation of geometry optimization.
Therefore, the stable configuration and electronic structure changes rule of clusters are one of the important topics in physics and cluster.
Finally, we obtain the stable structures, the binding energy, HOMO-LUMO energy gap and the average bond length of the Nen (n=2~36) clusters.
(2) Using the B3LYP method and 6-31G basis set of the density functional theory(DFT), we obtain the stable structures, the binding energy and HOMO-LUMO energy gap of the Nen clusters.
A number of different configurations have the same energy, or its energy have very small difference, so it is difficult to determine what kind of state is the most stable structure.

Friberg, Microemulsions – phase equilibria, characterizations, structures, applications and chemical reactions, Advances in Colloids and Interface Science 65 (1996) 125 – 287
Al-Muntasheri, Influence of surfactant structure on the stability of water-in-oil emulsions under high-temperature high-salinity conditions, Journal of Chemistry Volume 2017 (2017) ID 5471376
Schrock, Sensitivities of droplet size and stability in monomeric emulsions, Industrial and Engineering Chemistry Research 32 (2) (1993) 373-385
Chang, Colloid and Interface Chemistry for Water Quality Control, first ed., Elsevier Academic Press, London, 2016
Weiss, Investigations into the structure-function relationship of the naturally-derived surfactant Glycyrrhizin: Emulsion stability, Food Biophysics 15 (2020) 288-296.

It was found that the intramolecular hydrogen bond occurred in the 2-ethylhexyl 2-hydroxybenzoate structure.
The optimized molecular structure of both two possible conformers of 2-ethylhexyl 2-hydroxybenzoate.
The structural parameters of the optimized structure 2-ethylhexyl 2-hydroxybenzoate in gas phase.
The optimized structure of 2-ethylhexyl 2-hydroxybenzoate conformer 2.
ALLOUCHE, Gabedit - A graphical user interface for computational chemistry softwares, Journal of Computational Chemistry, 32 (2011) 174-182.

The structure of compounds PGPEs was confirmed by IR, 1H NMR, 13C NMR and elemental analysis.
And their structures were confirmed by FT-IR, NMR and elemental analysis.
Huang: Structure and mechanical properties of crosslinked glycidyl azide polymers via click chemistry as potential binder of solid propellant.
Dannhauser, Polymers: chemistry and physics of modern materials. 1974
Chemistry - A European Journal, 2014, 20:10710-10719.

Preparation of Dandelion-like Nano/Micro Zinc Oxide Material Yu Liang Department of Chemistry and Chemical Engineering of Xinxiang University, Xinxiang, Henan，China.
In the paper, the composition, structure and appearance of the sample were studied by means of XRD, SEM, RDS, SEAD, TEM, HRTEM and other methods.
Based on the further magnified SEM image, it can be seen that the structural units for the construction of dandelion shape are hexagonal structures, which is the typical crystal structure characteristic of zinc oxide, wherein the diameter of the rod-like structure is about 220 to 250nm, and the small particles on the surface of the rod-like structure are caused by metal spraying.
At the same time, we primarily discussed the mechanism for the formation of the dandelion-like three-dimensional ZnO structure.
Chem.Soc.Vol.131(2009): p.6670–6671 [3] Chen Weixiang, Xia Junbao, Xu Zhude, Zhejiang University, Vol.41(2007) p.1367-1369 [4] Wang Yanxiang, Fan Xueyun,Inorganic Chemistry Journal, Vol., 24 (2008) p. 434-438; [5] Huang,L.S,Wright,S;Yang,S.G;Gu,B.X.

Varieties structures have important impacts on biological activity of Amaryllidaceae isocarbostyril alkaloids, for example, the nuclear structure of isocarbostyril, the stereochemistry of the B/C ring junction, the C7-hydroxy of ring A, hydroxies of ring C and so on.
The functional hydroxyl groups in the molecular structure of narciclasine and its derivatives affect the cytotoxic activity.
PST, belong to the same isocarbostyril alkaloid, has the similar structure-activity relationship with narciclasine.
Conclusions The antitumor activities of isocarbostyril alkaloids have a close relationship with the molecular structures.
Li, et al. 2011 Chinese Medicinal Chemistry Symposium (Chinese Pharmaceutical Association, Guang Zhou 2011).