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Following 150 years of ensemble measurement in mainly fluids, the first recording of single-particle diffusion by Perrin provided nothing less than the ultimate proof of the atomistic structure of matter [3].
Fig. 4a) provides a schematic overview of the pore structure.
a) Sketch of the ferrierite crystal with a two-dimensional pore structure in z- and y-direction.
The structure of the one-dimensional channel with a loading of 1 propane molecule per segment is also shown (adopted from [18]).
Levin: Analytical Chemistry Vol. 67 (1995), p. 3377

Direction Committee of European Life Cycle Assessment (LCA) of Society of Environmental Toxicology and Chemistry (SETAC) has discussed methods and relevant standards of carbon footprint measurement, and considered that the current life cycle assessment (LCA) method may also be used for calculating the greenhouse gas emission amount of products according to ISO 14040 series of standards.
Concrete is the most widely used building material and civil engineering structure material in various ways, it is difficult to collect relevant data, and most of concrete is only used as backfill, recycled aggregate and raw material of recycled building products after being wasted.
Electric power runs through the entire concrete production process, and the carbon emission factor of electric power depends on the energy structure used in power generation process, mainly including hydraulic power, wind power, fire power and nuclear electric power generation mode, which has relatively large difference in different areas.
[13] Zhao Mingnan, Life Cycle Assessment on Concrete Structure Member of Ordinary Residential Buildings, master's thesis, Beijing University of Technology, 2013
[14] Dong Kuntao, Study on Carbon Dioxide Emission from Building with Reinforced Concrete Structure, master's thesis, Qingdao Technological University, December 2011

However, influence of sub-zero treatments, namely: cold treatment (CT), shallow cryogenic treatment (SCT) and deep cryogenic treatment (DCT) on structure-fracture toughness relations of tool steels e.g.
Severe demands for estimating fracture toughness as a function of (a) chemistry, (b) microstructure, and (c) cleanliness exist in the industry particularly for the inspection and quality control of medium and high strength steels.
Ray, “Accelerated fracture toughness testing for quality control of microalloyed steels”, In: Fatigue and Fracture in Steel and Concrete Structure, Oxford and IBH, New Delhi, (1991), 317–332. [9] Wu, S.
Kwon, “Fracture behavior of intercritically treated complex structure in medium-carbon 6Ni steel”, Metallurgical and Materials Transaction A, 18A(09), (1987), 1587-1592. [28] K.
Ray, “Structure–property correlation of sub-zero treated AISI D2 steel”, Materials Science and Engineering A, 541, (2012), 45–60. [31] G.T.

To fulfill all these requirements, materials with single composition and uniform structure may not be adequate.
Natural biomaterials in the human body satisfy these requirements often because of their functionally graded composition/ structure [3].
The pH changes (Fig. 8) were also measured and the values shows the increase of pH almost above 9. pH is a fundamental variable in cell culture medium because biological processes are sensitive to acid–base chemistry [60].
Elbestawi, Lattice structures and functionally graded materials applications in additive manufacturing of orthopedic implants: a review.
Bandyopadhyay, Direct fabrication of compositionally graded Ti-Al2O3 multi-material structures using Laser Engineered Net Shaping.

All the last efforts for improving wettability of PEDOT:PSS solution may impose a negative effect on IOSC performance through adding chemical additives or use of UV-ozone which may change the chemistry of the PEDOT:PSS material or may damage the surface of active layer, respectively.
We have measured series resistance of the ITO/PEDOT:PSS/Ag structure to evaluate the quality of the prepared Ag electrode to be used as a back electrode in IOSCs.
We have interested to study and investigate the ITO/PEDOT:PSS/Ag structure, because spray method of the Ag films onto PEDOT:PSS layer under different conditions may affect the series resistance of the complete solar cell through the effect on the PEDOT:PSS/Ag interface.
Figure 3 shows the effect of ethanol content, added to silver paste as 0, 33, 50, 60, 67 and 75 vol%, on resistance of the sprayed Ag electrode in the ITO/PEDOT:PSS/Ag structure with thermal annealing at 120 oC for 30 min and without thermal annealing through different measurement times up to 120 h.
Nelson, Gravure Printing for Three Subsequent Solar Cell Layers of Inverted Structures on Flexible Substrates, Sol.

The scanning electron microscope (SEM) imaging showed a spherical shape, smooth and homogeneous structure for nanoparticles.
The SEM images show a spherical-like structure that separates from each other.
The reason for the high width of this peak was the hydrogen bonding in this structure.
The absorption peak at 1067 cm−1 was due to the concentration of the C-O primary alcohol group in the extract's structures.
Environmental Chemistry Letters. 17(2), (2019), p. 991-1002

y x z a b Fig. 4 The crystalline structure of thorium oxide.
The clustering of PMMA molecules is in agreement with the concept of nanoheterogeneous structure of non-crystalline matter.
Solid State Chemistry 92, 27 (1991)
Bée, Quasielastic Neutron Scattering, Principles and Applications in Solid State Chemistry, Biology and Material Science, Adam Hilger, Bristol (1998)
Angell, Glass Structure by Spectroscopy, Dekker, New York (1976)

Empirical results show that multilayer-structured constructed wetland substrates have a clearly higher removal efficiency for COD, TP, and TN than single-layer-structured constructed wetlands.
Environmental Chemistry, 33(7) (2014) 1208-1213
Effect of substrate structure on pollutant degradations through substrate of horizontal subsurface flow constructed wetlands.
Numerical simulations of flow field and analyses of optimal structure for horizontal subsurface flow constructed wetlands.
Effect of substrate structure on purification performances of horizontal subsurface flow constructed wetlands.

Introduction Cement-based concrete patch repair mortars (PRMs) are generally used to extend the service life of deteriorating concrete structures.
This observation could be attributed to the unique chemical properties and structures of these polymers as reported in literature [2, 6, 10, 33].
This observation is consistent with those of compressive and tensile strength and can be attributed to differences in the chemistry and the degree of polymerisation of the polymers under investigation.
Such studies will elucidate the exact products of hydration, their mineralogy, the structure of the ITZ and the bonding between the mortar and polymer phases.
Matthews, CONREPNET: Performance-based approach to the remediation of reinforced concrete structures: Achieving durable repaired concrete structures, J.

Lauryl Sulphate (Sodium Dodecyl Sulphate, SDS), an anionic surfactant, was used to alter the interfacial tension and reduce capillary pressure while Gum Arabic, an organic adhesive gotten from the hardened sap of the Acacia Senegal and Acacia Seyal trees, having a similar molecular structure and chemical characteristics with Xanthan Gum, was the polymer used to mobilize the oil.
In American Chemical Society, Division of Colloid Chemistry (editor),”Natural Plant Hydrocolloids,” Washington, DC, (1954) p.20-32