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After the chemical reaction between intermetallic and water, three phases were indentified in the XRD pattern: the initially CuAl2 intermetallic with tetragonal phase, Al(OH)3-bayerite phase with monoclinic structure and finally Cu2O with an cubic structure.
Phase Structure Weight % H2 released volume (Lt) Al(OH)3 Monoclinic 65.49 1.135 CuClOH Monoclinic 18.06 0.476 CuO Monoclinic 16.45 0.188 CuAl2 Tetragonal - Total 100 1.799 Conclusions After the reaction between water and mechanically-activated CuAl2 powders, it can be concluded that the reaction products were hydroxides and oxides such as: Al(OH)3, CuO, Cu2O and H2.
Zhi, Study on mechanical behavior and electronic structures of Al–Cu intermetallic compounds based on first-principles calculations, Solid State Communications 151 (2011) 1270-1274 [2] C.
Liu, Recent advances in ordered intermetallics, Materials Chemistry and Physics 42 (1995) 77-86

These disadvantages result from the structure and composition of the PLA macromolecular chains, the ratio of optical isomers, and many other factors.
This behavior is a result of the greater mobility of polymeric, favoring the higher accommodation and stronger organization of macromolecules to achieve the most thermodynamically stable structure.
Thus, the double melting peaks may be associated with the formation of a less perfect crystal structure [20].
Daud, Morphological structure and thermomechanical properties of hemp fibre reinforced poly (lactic acid) Nanocomposites plasticized with tributyl citrate, Materials Today: Proceedings 5(1) (2018) 3211-3218
Žagar, Degradation of PLA/ZnO and PHBV/ZnO composites prepared by melt processing, Arabian Journal of Chemistry 11(3) (2018) 343-352

It could be attributed to the special structure of starch.
Starch derivatives with special structures could also be used to synthesize cement admixtures to improve their performances. β-cyclodextrin (β-CD) is a common starch derivative, which derives from enzymatic hydrolysis of starch. β-CD has a cone-shaped cyclic oligosaccharide containing seven glucose units.
Due to the special structure of β-CD, β-CD could be used as an original material to prepare cement admixture-water reducing agent (Lv et al., 2012) or introduced into polycarboxylate superplasticizers (PCE).
The control group was prepared with the same process, except that HPEG was the only macromonomer during the synthesis. 3 STRUCTURE CHARACTERIZATION 3.1 FT-IR analysis Samples were embedded in KBr pellets at a concentration of about 1 mg/100 mg, scanned by TENSOR 27 Infrared spectrometer (Bruker Co., German), the range of wavelength was between 400 and 4000 cm-1. 3.2 1 H NMR analysis The 1H NMR test was carried out on an AVANCE Digital 400MHz NMR spectrometer (Bruker Co., German).
Industrial & Engineering Chemistry Research. 54(37), 9081-9088. https://doi.org/10.1021/acs.iecr.5b02578 [11] Yan Y., Ouzia A., Yu C., Liu J., Scrivemer K., 2020.

Effects of Thermal Crosslinking on the Properties and Release Profiles of Three-Dimensional (3D)-Printed Poly Vinyl Alcohol (PVA) Tablets Thapakorn Charoenying1,a, Praneet Opanasopit1,b, Theerasak Rojanarata2,c, Prasert Akkaramongkolporn1,d, Prasopchai Patrojanasophon1,e* 1Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Thailand 2Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Silpakorn University, Thailand acharoenying_t@su.ac.th, bopanasopit_p@su.ac.th, crojanarata_t@su.ac.th, dakkaramongkol_p@su.ac.th, epatrojanasophon_p@su.ac.th Keywords: 3D-Printing, Poly Vinyl Alcohol, Thermal Crosslinking, 3D-Printed Tablets.
Food and Drug Administration (FDA). 3D printing has been used to develop the orodispersible tablets using with a highly porous structure.
The structure of the 3D-printed tablet was similar to a common tablet.
Moreover, the peak at 1140 cm-1 was reported in the previous study that the peak represented crystalline form of the structure [10].
The 100% infilled tablets have a larger surface area than the 80% infilled tablets due to the structure of the tablet.

Another reason for designing a more effective separation structure of the new dendrimer is that it reported that a hydroxyl group in β-carbon adjacent to amino group helped to form a seven-membered ring in the PAMAM membranes [12] so that the activation energy of the interaction and facilitated both of the absorption and desorption between CO2 and the amino group could be reduced by the ring formation.
Chemical structure of PAMAM dendrimer (generation 0).
Chemical structure of hydroxy-functionalized PAMAM dendrimer.
The structure of the obtained compound is determined by analysis of 1 H-NMR, 13C-NMR (JNM-EX 400 FT NMR spectrometer) and LC-Mass (Waters ZQ-2000 mass spectrometer).
Gao, Carbon Dioxide Capture: An Effective Way to Combat Global Warming Springer Briefs in Green Chemistry for Sustainability DOI 10.1007/978-3-319-17010-7_2 (2015)1-9

Compressive Strength after 120d soak (MPa) (%) Compressive Strength after 200d soak (MPa) (%) Water solution () Magnesium sulfate solution () Water solution () Magnesium sulfate solution () N1 38.3 40.6 106.1 44 36.3 82.5 N2 46.7 46.3 99.2 48.5 49.1 101.2 N3 49.0 50.3 102.7 52.3 43.3 82.2 N4 47.5 47.0 98.8 47.9 41.0 85.6 N5 53.4 52.2 97.8 59.9 50.0 83.5 N6 51.0 56.1 110 56.4 54.8 97.2 N7 57.2 56.4 98.6 60.3 54.5 90.4 N8 58.0 55.9 96.4 58.4 52.2 89.4 3 Discussion 3.1 Fresh properties of concrete with high-volume limestone powder as composite mineral admixture As finer than cement particle, limestone powder has a good filling effect, it reduces porosity of gel structure.
It plays a role in the deflocculation of “flocculated structure” of cement.
The main reason for the above experimental phenomena is that the increased volume of newly produced salt crystal at initial corrosion stage reduces concrete porosity, increases compactness and enhances the strength of concrete; the continuously increased expansion stress of a great quantity of expansive products in pore structure at later corrosion stage destroys the structure, continuously expands internal tiny crack and decreases the strength of concrete. 4 Conclusion (1) Since super-fine limestone powder is finer than cement and low-quality fly ash is coarser than cement, The composite mineral admixture has reasonable particle size gradation
Surface Physical Chemistry[M].

Cisitu Sangkuriang Bandung, 40135 Indonesia 4Department of Chemistry, Faculty of Mathematics and Sciences, Universitas Padjadjaran, Jl Raya Bandung Sumedang KM 21, Jatinangor 45363, Indonesia 5Department of Oral Biology, Faculty of Dentistry, Universitas Padjadjaran, Jl Raya Bandung Sumedang KM 21, Jatinangor 45363, Indonesia adenny.nurdin@fkg.unpad.ac.id (corresponding author), basprakkidas@yahoo.com, celsyrahimi@gmail.com, daruly94@gmail.com, eadhita@fkg.unpad.ac.id, fdikdikkurnia@yahoo.com, gmieke.satari@fkg.unpad.ac.id Keywords: Terpenoid, PLGA, drug delivery system, Enterococcus faecalis Abstract.
Some developments in medical delivery system with controlled release, focus on the application of polymer with design specification in macroscopic structure, microscopic, and chemical feature.
A controlled release rate caused by homogeneity of PLGA nanoparticle structure, which encapsulates the terpenoid.
Ten Cate, Oral Histology: Development, Structure and Function, fifth ed., Mosby Inc., St.
A Structure-activity study of antibacterial diterpenoids, J.

Synthesis and properties of molecularly imprinted composite membranes of roxithromycin Jin-yang Yua, Xiao-ling Hub , Cui-cui Jiaoc, Ya-mei Zhao d, Wei-wei Yange Department of Applied Chemistry, College of Science, Northwest Polytechnical University, Xi'an 710072, Shannxi, PR China a email: mercury3302@126.com, bemail: huxl@nwpu.edu.cn, cemail: jiaocc1985@yahoo.com.cn d email: zhaoyameihp@126.com, eemail: weiweimuyi1@163.com Keywords: Molecularly imprinted composite membranes; Thermal co-polymerization; Roxithromycin; Binding capacity; Transport property.
It is also evident from the cross-sectional images (Fig. 1C and D) that the MIP membrane has an asymmetric structure, which consists of a thin and dense layer (imprinted layer), a large porous layer having finger-like void structure in the micron range, and a dense porous layer with sponge-like structure pores less than 1.5µm.
In addition, EM, AM and RM also have much higher binding capacity on the MIP membrane than on the NMIP membrane, because their structures are similar to RM.

Such a discrepancy between these two types of knowledge is also reflected in the assessments made of the degree in Industrial Engineering and Technical Engineering Mechanics, Electronics and Chemistry at the University of Girona (UdG) in the reports: Informe d’autoavaluació d'Estudis d'Enginyeria dels: EI, ETIM, ETIEI, ETIQI (1998) and Informe d’avaluació externa de la titulació d'Enginyeria Industrial de l'Escola Politécnica Superior de la UdG (1999).
Machines and structures are not rigid bodies.
Because of that and the external forces applied, the structure of the machine moves.
Self-excited vibration appears due to the interaction between chip removal processes and the structure of the machine tool.
For this reason, the mass, stiffness and structure of the material must be taken into account to ensure the use of a suitable hammer and sensor.

During the process, an increase in the viscosity of the reaction solution is observed, and the resulting polymer consists of units corresponding in composition and structure to the monomeric quaternary salt (M.h.s.).
Averko-Antonovich Chemistry and technology of synthetic rubber. - L .: Chemistry, 1970.