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The content of humic acids and their structure depend on the composition of input materials as well as on the composting process.
The basis of chemical structure of HAs is formed by aromatic rings forming skeleton of molecule.
Toluene together with benzene characterizes condensed structure of humic substances.
During the composting, aromatic structure of lignin represents some chemical resistance against decomposition and it forms building blocks for synthesis of humic acids [15].
Schnitzer: The chemistry of soil organic nitrogen: a review.

The samples were used for observing biological structures and measuring ratio of cell wall and cavity. -- Just peel and cut into small pieces lengthwise.
The samples were used for making alkali peroxide mechanical pulp (APMP). 2.2 Methods 2.2.1 Biological structures observation and measurment on ratio of cell wall and cavity The samples were treated by exhausting, softening, slicing, dying in sequence.
Biological structures were observed by THMSE600 polarizing microscope.
Results and discussion 3.1 Biological structures and ratio of cell wall and cavity. 3.1.1 Biological structures characteristics Biological structures of fast-growing black poplar branch was observed by light microscope ×200.
Fiber Motphology of Some Seatered Bamboos and Properties of Physies and Chemistry.

As can be seen from the figure that there are 3 kinds of structures H in the molecular structure of XBT, the absorption peak at the leftmost side is formed by the exchange of dissociated H and D in the -COOH group of molecular structure; while the absorption peak at the rightmost side is H in the -CH2CH2O- group of long side chain structure, and the absorption peak in the middle is H in the -CH2CH2- group of backbone chain structure; on the right side of the absorption peak of backbone chain, a weak absorption peak can be seen, which may be H in poly (acrylic acid).
From overall point of view, the molecular structure of nuclear magnetic resonance map of XBT is very similar to that of other polycarboxylate additives.
As shown in Figure 3 that the functional groups contained in the XBT structure are also very similar to other common polycarboxylate molecule.
What can be seen from Figure 4 is that there is an obvious absorption peak for XBT with the broadband ranging from 190 cm-1 to 240 cm-1, which resulted by lots of C=O double-bond existing in the molecular structure of XBT.
the water of Region III inside the micro particle aggregates can be released, forming the structure as shown in Figure 9D.

The process of protection is a comprehensive process that involves subjects such as archaeology, art, structure, technology, chemistry, physics, biology and geology.
Physical transformation deepens cracks continuously and makes harmful solutions get to the depths of structures to disintegrate them.
The chemical action alters natures of structures, and the biological action transforms surface properties of stones.
Crack, Fracture and Flaw Crack is the external manifestation of internal pathological changes of ancient stone bridges and is harmful to structures’ safety.
Plant existence makes stone masonry separate mutually and leads to the looseness and water penetration, causing structures to damage and disintegrate gradually.

This layer of small thickness, chemical composition and metal-ceramic structure exhibits high corrosion resistance and high flexibility.
The ceramic-metal three-component Ti3SiC2 phase with a nanolaminated structure is the MAX phase.
Structure of the surface layer (a), nano-crystal structure of the foamed layer I (b), amorphous structure of the double layer II + II (c, d) Figure 3.
The surface layers exhibit a gradient structure.
Fabrication of Ti3SiC2-based composites from titania-silica raw material, Materials Chemistry and Physics 162 (2015) 216-221. https://doi.org/10.1016/j.matchemphys.2015.05.060 [12] D.

Carbonation is a very common chemical process, to which concrete structures being subjected to during service life in natural environment.
Aluminum paste GPB-1 was used to produce cellular structure in the concrete matrix.
Lesovik, Use of geonics scientific positions for designing of building composites for protective (fortification) structures, IOP Conf.
Lesovik et al, Assessment criterion of surface energy properties, Nanosystems: Physics, chemistry, mathematics. 2 (4) (2011) 120–125.
Ageeva, Fine-grained concrete on industrial sands for bridge structures.

N-loaded TiO2 for Photocatalytic Degradation of Methyl orange under Visible Light Irradiation Natkritta Boonprakob1,2, Natda Wetchakun3, Sukon Phanichphant4, Jun Chen5,a, Burapat Inceesungvorn6,b 1Department of Science, Faculty of Science and Technology, Uttaradit Rajabhat University, Uttaradit, 53000, Thailand 2Nanoscience and Nanotechnology Program, Graduated School, Chiang Mai University, Chiang Mai 50200, Thailand, 3Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand, 4Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand, 5Intelligent Polymer Research Institute, ARC Centre of Excellent for Electromaterials Science, Australian Institute of Innovative Materials, University of Wollongong, NSW, 2500, Australia, 6Department of Chemistry, Faculty of Science, and NANOTEC Center of Excellence, Chiang Mai University, Chiang Mai 50200, Thailand ajunc@uow.edu.au
Physical characterizations of the as-prepared catalysts have been performed by using X-ray diffraction (XRD), Diffuse reflectance UV-vis spectroscopy (DR UV-vis), Raman spectroscopy and BET specific surface area in order to obtain structure-activity relationship.
Sample Characterization Crystalline structures of the as-prepared samples were determined using GBC EMMA 0133 X-ray diffractometer.
However, upon increasing calcination temperature to 500 and 600ºC, the peaks corresponding to rutile structure (JCPDS No.76-318) were found.
The Ti-N vibrational peaks found in the Raman spectra of N-loaded TiO2 calcined at 400ºC suggested that nitrogen possibly substituted for an oxygen atom in TiO2 structure.

Sol-gel Synthesis of Nanocomposite Li4Ti5O12/Carbon Nanotubes as Anode Materials for High-Rate Performance Lithium Ion Batteries Xiaowei Miaoa, Hongming Heb, Liyi Shic , Xinluo Zhaod and Jianhui Fang*e Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China amioxiaowei@shu.edu.cn, bhehongming1011@gmail.com, cshiliyi@staff.shu.edu.cn, dxlzhao@shu.edu.cn, ejhfang@shu.edu.cn Keywords: anode materials, Li4Ti5O12/carbon nanotubes, high-rate capacity, cycling performance Abstract.
The crystal structure and morphology of the nanocomposite Li4Ti5O12/CNTs are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively.
CNTs’ special hollow structure and the large interlayer distance provide a good channel for Li+ intercalation/deintercalation, which can also act as a bridge to enhance the connectivity among the particles.
The phase and structure of the Li4Ti5O12/CNTs and Li4Ti5O12/C composites were characterized by X-ray powder diffraction (XRD) measurements using Rigaku D/max-2550 diffractometer with CuKα radiation, operated at 40 kV and 200 mA.
The as-synthesized nanocomposite of Li4Ti5O12/CNTs remains the face-centered cubic structure spinel Li4Ti5O12.

Abed3,c 1Advanced Construction Engineering Research Center, Department of Civil Engineering, GLA University, Mathura- 281406, Uttar Pradesh, India 2Department of Chemistry, GLA University, Mathura- 281406, Uttar Pradesh, India 3Hilla University College, Babylon, Iraq akamal.kishore@gla.ac.in, baayshapandey2402@gmail.com, ca77medsalim2@gmail.com Keywords: Coral concrete, marine structure, reef, strength, durability.
On the other hand, strong and durable structures also begin to lose momentum during energy efficiency.
The structures, thus made of, will eventually experience lower service life and will damage earlier than the conventional concrete structures
Li, “Recent durability studies on concrete structure,” Cem.
[7] Scholer, C.H.: Examination and study of certain structures in the Pacific Ocean Area, progress report.

The high-temperature cubic phase with the fluorite structure (sp. gr.
Reynolds, Chemistry of Zirconium Dioxide X-Ray Diffraction Studies, Ind.
Garvie, Stabilization of the tetragonal structure in zirconia microcrystals, J.
Teufer, The crystal structure of tetragonal ZrO2, Acta Cryst. 15 (1962) 1187
Trueblood, The crystal structure of baddeleyite (monoclinic ZrO2), Acta Cryst. 12 (1959) 507-511