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The optical activity of a substance is caused by a certain structure of its molecules.
In the second case this behavior used in chemistry for determining the concentration of a solution.
Acknowledgement This work was supported by Department of Physics and Department of Chemistry, Faculty of Science and technology, Phranakhon Rajabhat University (PNRU).

Jezowski, “Review of water network design methods with literature annotations,”Industrial & Engineering Chemistry Research, 49 (10), 4475-4516, (2010)
Feng and W.D.Seider, “A new structure and design methodology for water networks,”Industrial & Engineering Chemistry Research, 40, 6140-6146, (2001)

Its high hardness and bonding strength, good wear and corrosion resistance, have wide applications in fields of petroleum, chemistry, mechanical and electronic.
It is very important that rare element Ce has a 4f outermost electrical structure and strong adsorptive capacity.
Materials Chemistry and Physics, 2004, 87: 102-108

Preparation and characterization of clays from different areas in Ban Bo Suak, Nan province, Thailand Usanee Malee1,2,a* and Sakdiphon Thiansem3,b 1Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand. 2Science and Technology, Chiang Mai Rajabhat University, Chiang Mai 50200, Thailand. 3Department of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
Summary XRD and XRF techniques indicated that all JQA, FQB, PQC and NQD clays, fired or unfired, clays had the majority of SiO2 quartz structure (>80 wt. %), but a rather low alkalin.
Grimsahw, The Chemistry and Physics of clays, Leanest Benn Limmited, London, UK. (1971), pp 872

Study of Synthesis of SiO2 Aerogel from Coal Gangue at an Ambient Pressure Jinmeng Zhu1a, Huiwu Cai1b, and Nannan Dang1c 1College of Chemistry and Chemical Engineering , Xi’an University of Science and Technology,Xi’an,Shanxi,710054,China.
Introduction Aerogels are low density nano-porous non-crystalline solids whose structures can be controlled through preparation[1].They have been found extremely applications in many fields such as catalysis, adsorption, window insulating systems, drug delivery systems, etc due to its high porosity(>90%), high specific surface area (500–1000m2/g), low bulk density(~0.03 g/cm3), extremely low thermal conductivity (0.005 W/mk), and low sound velocity (100m/s)[2,3,4,5,].
References [1] C.J.Lee, G.S.Kim and S.H.Hyun: Journal of Materials Science Vol. 37(2002), p. 2237 [2] Zaidong Shao, Fengzuan Luo, Xuan Cheng and Ying Zhang: Materials Chemistry and Physics: Vol.141(2013), p. 570 [3] Dafang Zhao, Yiming Chen, Xiaobin Hong and Jing Xu: Journal of the Chinese Ceramic Society Vol.32(2004), p. 548 [4] Yimin Chen, Dafang Zhao, Kai Xie and Jiayu Xiao: Journal of the Chinese Ceramic Society Vol.33(2005), p. 727 [5] Uzma K.H.

Tert-butyl acrylate (98 %) was obtained from Aldrich Chemistry.
N-butyllithium (n-buli) (2.0 M), 4-vinyl benzyl which is act as coupling agent and toluene as a reaction medium were purchased from Sigma Aldrich Chemistry.
“Surface weting behavior of the poly (styrene-b-isoprene-b-styrene) triblock copolymer with different chemical structures of the polyisoprene block chain”.

And the agglomerations become locally stable body structure, which will produce a greater steric hindrance effects in relative motion process.
Colloid and Surface Chemistry.
Colloid and Surface Chemistry.

Introduction Siloxane oil is one kind of polysiloxanes that with chain-like structure [1].
Organosilicon chemistry.
Chemistry World, 1989, (10), 447-449.

The influence of aggregates on the properties of concrete Pavel Šiler1, a, Ondřej Bezděk1, Iva Kolářová1, Eva Bartoníčková1, Tomáš Opravil1 and František Šoukal1 1 Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Czech Republic asiler@fch.vutbr.cz Keywords: Concrete, portland cement, aggregates, isoperibolic calorimetry, compressive strenght, flexural strenght.
The weakest point of concrete structure is the binding between cement stone and aggregate particles.
The data were collected using an isoperibolic calorimeter constructed at the Faculty of Chemistry, Brno University of Technology (Brno, Czech Republic) [5] and the resulting value of heat was obtained by numerical integration and multiplying by the integration constant of calorimeter which was obtained from the calibration.

With the increase of enzyme addition amount, the structure of colloidal substances such as plant cell walls were fully destroyed.
Food Chemistry,2007,104（4）:1396-1401 [2] Tiwari BK, Muthukumarappan K, O'Donnell CP, et al.
Food Chemistry. 2017, 215: 483-92.