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For this purpose adsorption materials are most frequently applied, which are placed into permeable envelopes and are used as boom containments of various structures.
Another is the complications of using loose materials, which requires making frame structures – mats, boxes, cushions, and makes it difficult to extract the used materials, as after saturation these structures become heavy and sink.
Novoselova, Materials for the adsorption cleaning of water from petroleum and petroleum products, Chemistry for the benefit of sustainable development. 13 (2005) 359-377

Hydrothermal synthesis method allows production of nanoparticles with defined size, structure and homogenous composition whereas other techniques such as sol-gel and micro-emulsion are difficult to scale-up and require significant post-treatment to obtain crystalline products [7].
Iron oxide structures are chemically stable and of large specific surface area.
X-Ray Diffraction (XRD) was performed to understand the crystalline structure of the nanoparticles.
Gkanas, '"In vitro magnetic hyperthermia response of iron oxide MNP’s incorporated in DA3, MCF-7 and HeLa cancer cell lines," Open Chemistry, vol. 11, no. 7, -07-01, pp. 1042

But, the surface structure of spent Hybrid TiO2 catalyst is about the same structure as the fresh Hybrid TiO2.
Journal of Photochemistry and Photobiology A: Chemistry 216 (2010) 215–220
The study of the relationship between pore structure and photocatalysis of mesoporous TiO2.

Pyridine-3,5-dicarbonitriles (PD) of general structure 1 demonstrate activity against a wide range of biological targets[13-17].
The typical multi-component reaction (MCR) employing aldehydes, malononitrile and thiols to synthesize structure 1 proceeded only in low to moderate yield (route A in Scheme 1)[18-19].
By studying the reaction mechanism, especially the oxidation mechanism of the intermediate 1,4-dihydropyridine 2, we improved the reaction yield by about 50% via using an extra equivalent of the Knoevenagel adduct 3 in situ (route B in Scheme 1), concluding that the structure 3 played a significant role as oxidant in the final oxidation step[20].
Therefore, the optimal temperature for this MCR would be 90 ºC for 30 seconds in ethanol using MWI, representing a significant move toward green chemistry by substantial savings on energy consumption.

Effect of Steam Treatment on Catalytic Performance of La2O3-HZSM-5 for Methylation of Toluene with Methanol Junhui Li, Zhonghua Hu, Yanan Wang, Hao Xiang, Zhirong Zhua* Department of Chemistry, Tongji University, 1239.
Introduction Due to the special framework structure and the unique pore diameter, ZSM-5 has been a shapeselective catalyst used widely in many important industrial processes, for example, alkylation[1], aromatization[2], disproportionation[3], and so on.
In addition, introduction of La2O3 can not only enhance selectivity of p-Xylene and stability of framework structure of zeolite[15,16], but also inhibit formation of coke[17].
Wang and H.H.Li The Effect of Steam Treatment on the Structure, Acidity and Catalytic Property of HZSM-5 Zeolite.

Manganese can stabilize chloroplast structure and take part in photolysis in photosynthesis.
Researches proved that calcium play important role in structure and physiological function for plants [9].
It has the abilities to regulate permeation, to promote enzyme activities, to stabilize structures of cells and chromosomes and to resist cations [10].
Ecology and Environment, 12 (2003) 508-511 [2] B C Xie, C X Zhang, X Z Xue, Characteristics of Environmental Chemistry for Trace Elements in Soil.

For its interesting electrochemical, photophysical and magnetic properties in the field of electro analytical chemistry, it attracts the attention of biosensor community.
This paper not only provides the structure and magnetic properties of the prepared samples, but also helps to synthesize good magnetite NPs quickly for industrial and medical applications.
Spinel structured magnetite NPs have extensively been used for their application in nanomedicine.
Magnetite NPs are in cubic spinel structure and could be well indexed to the pure cubic phase.

A TEM image of the as quenched sample is presented in Fig. 4 (left), where the laths of the martensitic structure are clearly visible.
In a martensitic structure, many hydrogen traps such as grain boundaries, dislocations, internal stress regions or free carbon are present.
Chan [14] reported that the hydrogen content was drastically reduced when a martensitic structure was tempered and related this with a decrease in dislocation density during tempering.
Kissinger, Analytical Chemistry, 29, (1957) 1702-1706

The structure diagram is shown in Fig.2.
This state hardly controllable, in which the work area is reduced rely on friction disc properties and clutch structure, or by a control strategy to avoid friction piece of work in the region.
Input various parameters of hydro-viscous speed control system, according to the fuzzy PID schematic structures, builds the simulation system as shown in Fig.7 on Simulink platform.
[3] Chen J C.A correlation for boiling heat transfer to saturated fluids in convective flow[J].Industrial and engineering chemistry Process Design and Developed . 1966(3): 322-329

Hu Chun and some other people[4] brought forward that 3, 4 - o dihydroxy on the B-ring of flavonoids is the critical structure to free the biological activity of the radical scavenging, and other hydroxyl also play some kind of roles.
Especially the rutin and quercetin of the buckwheat extract, which have o-dihydroxy exist on B-ring structure, can easily provide hydrogen protons and electrons to get reaction with hydroxyl radicals, and finally free the radical scavenging.
And tartary buckwheat is also rich in flavonoid, fagopyritol, d-chiro-inositol, anthocyanidin and other functional ingredients, which have clear compositions and structures, and the significant effect of anti-tumor, anti-oxidation and freeing radical scavenging, preventing and treating of cardiovascular disease, regulate blood sugar, blood lipids, blood pressure and other aspects.
Liaoning University of Traditional Chinese Medicine,2009,11 ( 5 ) :195 -196 [8]E.P.Cai and J.K.Lin:Epigallocatechin gallate (EGCG) and rutin suppress the glucotoxicity through activating IRS2 and AMPK signaling in rat pancreatic beta cells.Journal of Agricultural and Food Chemistry, 2009,57 (20): 9817 -9827 [9] ZIELINSKA D, SZAWARA-NOWAK D, ZIELINSKI H.