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Plant structure is considered as porous media.
The raw material for extraction is usually dried and the drying method affects the plant tissue micro-structure.
The infiltration favors the extension of skeleton structure and results from the deformation of particle skeleton structure by the solvent.
The effect of solvent on the plant tissue porous structure.
Solvent immersion will change the porous structure of the plant tissue and hence affect the extraction efficacy.

Microwave-Assisted Synthesis of Unmodified Gold Nanoparticles for Colorimetric Detection of Dopamine Ekarat Detsri1, 2 a*, Kanrayasiri Kamhom1, b, Chatsuda Detsri3, c 1Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand 2Advanced Materials Research Unit, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand 3Piboonbumpen Demonstration School, Faculty of Education, Burapha University, Chonburi 20131, Thailand aEkarat.de@Kmitl.ac.th, bKanrayasiri.kam@Hotmail.com, cChatsuda@Buu.ac.th Keywords: Colorimetric sensor, Dopamine, Microwave irradiation, Nano materials, Unmodified gold nanoparticles.
It was based on the aggregation change of the nanoparticles from random coil to hairpin structure upon the addition of dopamine concentration.

With nitrogen addition above 2000 ppm, diamond film was partly doped and some sp2 structures appeared.
The increase in growth rate is attributed to the change in the surface chemistry which may influence the (100) surface growth mechanisms of the crystal, enhancing the diamond growth rate on this face [6-8].

Although we use the singular ("C-S-H"), the plural ("C-S-Hs") should be better since "C-S-H" stands for a family with wide changes in stoichiometry, structure and morphology.
c) At microscopic scale, the C-S-H has a layered structure (Fig. 1), which can be seen as deriving from mineral tobennorite (Cll4+xSi6O14+2x(OH)4.2x(H2Oh, with O $ x $ 2).
[3] H.F.W.Taylor: Cement Chemistry, 2nd edit.
The mechanism of formation and nano-/micro-structure control have been investigated in detail for SrTiO3 [ 17, 18], Ba Ti 0 3, and LiCoO2 [21 , 22).
Yosl1imura, et al.: Chemistry of Materials, lQ [8] 2183-2 188 ( l 998) (22] S-W.

In this paper, the boundary element method (BEM) is investigated and computer simulations are conducted to study the patterns of structure formation of non-isometric elements.
The aim of the study is to improve the boundary element method for computer simulation of the regularities of the structure formation of non-isometric elements.
It should be noted that the study of non-isometric components is an important task in many scientific fields, such as physics, chemistry, biology, materials science, modelling, etc.
Vafai, Multiscale homogenization of aluminum honeycomb structures: Thermal analysis with orthotropic representative volume element and finite element method, Heliyon 10 (2024) 1-19
Ghouse, A validated finite element analysis procedure for porous structures, Materials and Design 189 (2020) 1-14

After the processing, analysis and study are carried out on the metallographic structure and mechanical properties of these materials.
Introduction With the development of science and technology, especially advanced manufacturing technology, marine technology, space technology, petrochemicals and nuclear technology, mechanical structures and components of the material ask for higher requirements, for alloy material often requires high strength, high hardness, high wear resistance, high temperature, corrosion-resistant.
In the EDM machining, the material is removed by the heat of discharge, the microscopic process is the comprehensive results of electric field strength, magnetic, fluid dynamics, colloid chemistry and electrochemistry.
The melting point of titanium 1660 ℃, melting point of stainless steel between 1398 ~ 1420℃ , thermal conductivity are poor, so the machining of titanium and stainless steel needs a lot of energy; Since the titanium alloy and stainless steel shall be heated and cooled in the process of electric processing, there will be a change in the metallographic structure and an increase in the hardness of the material surface, which is not conducive to the electric processing.
The analysis of the metallographic structure indicates that there’s no deep heat layer formed on the surface of the processed difficult-to-machine materials.

Since graphene was discovered, the biomimetic materials with laminated structure (such as, shellfish) had become one of the research-hot fields.
Preparation of biomimetic materials with laminated structure utilizing chitosan have many advantages, however, to improve functional properties of chitosan based biomimetic materials is still a great challenge.
In our previous studies, surface modification of ZnO/CuS hetero-structured nanocomposite with chitosan grafted polymer by self-assembly process was reported for improving surface biocompatibility [39].
As shown from Fig. 1, the whole morphology of the nanocomposite prepared is nanosheets like structure.
peaks belong to hexagonal structure of ZnO.

But the special toroid structure can not be fabricated through traditional technology.
As the CO2 laser is Gaussian distribution, the cavity center will collapse, causing a toroid structure on the cavity periphery.
Because of thermal effect, the internal structure of silicon is changed, causing a change of silicon refractive index.
H; Ashish, B; Vahala, K.J. 5-Gbit/s BER Performance on an All Fiber-Optic Add/Drop Device Based on a Taper-Resonator-Taper Structure.
Journal of Electroanalytical Chemistry. 2006, 589, 249-258

The foams exhibited a broader foaming time processing window, a more isometric cellular structure and decreased open-cell contents.
The cellular structure of the several foams was analyzed using a JEOL JSM-5610 scanning electron microscope (SEM).
Results and discussion Foaming behaviour and cellular structure.
Although similar cellular structures (cell sizes and aspect ratios) were assessed for the several foams, first of all a more isometric and finer cellular structure was observed for the PP-MMT foams when compared to the λλλλradial λλλλaxial respective unfilled ones and secondly the low relative density PP50Mg foams showed a highly oriented cell structure with higher cell sizes.
Weast: Handbook of Chemistry and Physics, 53rd ed, The Chemical Rubber Co., Ohio (1973)

Potassium vapor and carbon monoxide gas reacted with components of the material, respectively, resulted in potash deposition and carbon deposition inside the brick, which destroyed the structure and  degraded the properties of the material.
The crystal morphology and the structure of sample does not change significantly.
Part of matrix flaking after potassium vapor erosion results in a loose local structure.
(2) Potassium vapor entered into chromium-containing products through pores and lead to crack formation and volume change, which destroyed the structure and reduced  high temperature volume stability of material
Wang, et al, Transformation of potassium during catalytic gasification of coal and the effect on gasification, Journal of Fuel Chemistry and Technology. 41 (2013) 265-270