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This suggests that roasting changes the bean structure, making them less likely to absorb moisture during storage, which affects their hardness.
Coffee beans are hygroscopic, meaning they tend to absorb moisture from the air, which can change their structure.
Hofmann, “The chemistry of roasting—Decoding flavor formation,” in The craft and science of coffee, Elsevier, 2017, pp. 273–309

In these SEMs, it was clearly observed that there were existences of porous unit in hydrogel network structure in both of these figures.
Besides that, the morphology of hydrogel were also shows the existence of porous unit in the structure that also contribute to absorbency properties.
Application of superabsorbent polymers for improving the ecological chemistry of degraded or polluted lands.

Analysis of Antioxidant Properties and Major Components of the Extract of Paulownia tomentosa Steud Flowers Zhifen Meng1, a, Xuefeng Guo 2,b, Yong Zhu1 and Shuke Jing1 1 Department of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Henan Xinxiang 453003, PR China 2 State Forestry Administration Key Open Laboratory, International Centre for Bamboo and Rattan, Beijing 100102, PR China a mengzf@yeah.net, b Corresponding author: gxf71622@ icbr.ac.cn Keywords: UPLC-TOF-MS/MS, Paulownia tomentosa Steud flower, DPPH, superoxide anion, hydroxyl, IC50 value Abstract: Paulownia tomentosa Steud flowers have been used for many therapeutic purposes in traditional pharmacopeia.
The structures of the compounds were analyzed using high-resolution mass spectrometer, high-resolution mass spectral analysis was performed at a Q-TOF MS/MS 6540 system (Agilent Technologies, Singapore) equipped with a JetStream technology ESI ion source.
The structures of the primary compounds in the eluted components were tentatively confirmed by mass chromatogram analysis.

The anti-tumor activity of the polysaccharide is by enhancing the immunity of healthy cells, inhibiting the pathological proliferation of tumor cells, and alleviating the severe damage of healthy cells in chemotherapy, which is of great significance to the development of modern medicine. [3-5] At present, the main research of the extraction of polysaccharides from umbilicaria is the relatively simple hot water extraction method, but this method requires high temperature and the structure of polysaccharides is easily destroyed by high temperature, resulting in a low yield of polysaccharides[6].
While the Ultra-high pressure (UHP) exceeds 300 Mpa, the stone-ear polysaccharide structure is destructed by the excessive pressure, which results in the decreasing trend of the yield of polysaccharides.
Food Chemistry. 212 (2016) 476-484

Sample Æ (mm) d (0.1) (mm) d (0.5) (mm) d (0.9) (mm) SPS 10.38 1.47 7.20 22.72 CHOLU 9.93 1.23 6.23 21.32 Original particles of SCBA samples showed a special morphology, because they maintain partially the structure of the vegetal cells in the sugarcane plant.
Paste containing CHOLU ash showed a large amount of amorphous C-S-H structures.
Chemistry and Morphology of Hydrogarnets Formed in Cement-Based CASH Hydroceramics Cured at 200ºC to 350 ºC, Journal of American Ceramic Society 92 (2009) 1105–1111

Sisal Composite is an orthotropic material; the modulus in the longitudinal direction is not enough for effective design of structures made with these materials.
A new biodegradable sisal fiber–starch packing composite with nest structure.Carbohydrate Polymers, 189 (1), 56-64 [7] Prasanthi, P., SivajiBabu, K., NiranjanKumar, M.
Preparation and Properties of Small-Particle Corn Starch, Cereal Chemistry. 69(3), 280-283

The result suggests that the loading of Co onto the support can not significantly change the structure of the support.
In case of this work, the support MgAl2O4 prepared by different methods shows different structure, morphology and reducibility, which in turn affects the reactivity of CoOx/MgAl2O4 catalysts in the liquid phase oxidation of BzOH by H2O2.
Acknowledgements This work was financially supported by National Ministry of Education (20096101120018, NCET-10-878, SRFRCS-2009-37th), Shaanxi “13115” Innovation Project (2009ZDKJ-70), Science Research Project of Shaanxi Education Department (09JK793), Northwest University (No: PR09005) and State Key Lab for Physical Chemistry of Solid Surfaces (2009).

Machine learning-based models for predicting the shear strength of synthetic fiber reinforced concrete beams without stirrups[C]//Structures.
The phenomenon of cracking in cement concretes and reinforced concrete structures: the mechanism of cracks formation, causes of their initiation, types and places of occurrence, and methods of detection—a review[J].
Journal of Industrial & Engineering Chemistry 2015;32(Complete):153-6

For instance, the functionalization of magnetic particles with folic acid may be carried out using carbodiimide chemistry [30].
Recent papers concern the synthesis of magnetite structures by methods other than precipitation [58, 59].
Therefore, it acts perfectly as a temporary scaffold, which determines the nature of the final structure without being a part of it [71].
Therefore, X-ray diffraction is an additional technique used to establish the structure of the ultrafine particles.
The microscopic structures of these fluids change in the presence of a magnetic field, which leads to a phase transition from a liquid to a solid.

The calcination atmosphere strongly affected the composition, structure, and optical and antimicrobial properties of TiON nano-particles.
It was suggested that the structure and nature of the doping significantly affected the performance of the photocatalyst for E. coli inactivation.
Jacoby, Application of the photocatalytic chemistry of titanium dioxide to disinfection and the killing of cancer cells, Sep.
Kido, Electronic structures of promising photocatalysts InMO4 (M=V, Nb, Ta) and BiVO4 for water decomposition in the visible wavelength region, J.
Sun, High-performance multifunctional TiO2 nanowire ultrafiltration membrane with a hierarchical layer structure for water treatment.