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Introduction Technological lubricants used during forming processes can be divided into the four basic groups: 1. water-based lubricants (e.g. soap emulsion), 2. lubricants based on mineral and vegetable oils, 3. synthetic lubricants, 4. solid lubricants, especially with layered structure, such as graphite or molybdenum disulfide.
Mechanism of lubrication of friction surfaces by means of oil with addition of boric acid: 1  boundary layer, 2 - depressions on the surface filled with boric acid, 3 - sliding surface of boric acid Crystalline structure of boric acid (Fig. 6) is similar to the structure of graphite, which, being a substance with layered structure of the crystal lattice, is widely used as a solid lubricant or additive for lubricating mixtures.
Good lubricating properties of boric acid result from its layered structure of crystal lattice, with atoms of boron, oxygen and hydrogen distributed in a flat layer and connected with each other with strong covalent bonds whereas much lower van der Waals forces are observed between atoms in the neighbouring layers.
Tenne, Inorganic fullerene-like material as additives to lubricants: structure–function relationship, Wear 225–229 (1999) 975–982
Busch, Tribological properties of boric acid and boric-acid-forming surfaces, Part 1: crystal chemistry and mechanism of selflubrication of boric acid, Lubr.

MEMS is a micro-system which integrated micro-structure, micro-sensors, micro-actuators, process control circuits, interface, communication and power supplier into one or several chips.
It combines integrated circuit manufacturing techniques and micro-structure technologies.
As a leading cross research field based on microelectronics, MEMS involves electronics, mechanics, material engineering, physics, chemistry, biomedicine and so on [2].
These advantages make micro-electroforming technology suitable for sophisticated manufacturing method of fine structure [9].
OMs can be used to observe microscopic structure [24].

Strong towers have reinforced structures and are adapted to the action of line tension forces.
This is steel with a ferritic-pearlitic structure that is soft magnetic.
Magneto-mechanical effects (MME) occuring in this structure [9-12] include coupling of the state of magnetization of the material with the state of effort, deformation, and degradation of structure.
Anisotropy, symmetry, structure (Oxford University Press 2005)
[27] International Critical Tables of Numerical Data, Physics, Chemistry and Technology Vol. 

Regular and uniform PANSA nanotubes are observed where the network structure is believed to increase the effective surface area of the electrode to load large amounts of enzyme.
To clarify whether or not PANSA used in the present study could seriously distort the structure of CYP2D6 and lead to loss in bioactivity, UV-vis spectroscopy was used to characterize the Soret band of the heme redox centre in CYP2D6.
From the spectra and electrochemical analyses, it was concluded that the secondary structure of CYP2D6 immobilized on the nanotubular polymeric film was not destroyed and continued to retain its biological activity after biosensor construction [32].
Contractor, Studies on electropolymerization of aniline in the presence of sodium dodecyl sulfate and its application in sensing urea, Journal of Electroanalytical Chemistry. 528, (2002) 46-56
Laviron, The use of linear potential sweep voltammetry and of a.c. voltammetry for the study of the surface electrochemical reaction of strongly adsorbed systems and of redox modified electrodes, Journal of Electroanalytical Chemistry. 100 (1979) 263-270

Photocatalytic and Photoelectrochemical Properties of Nitrogen-Substituted TiO2 Thin Films Prepared by an RF Magnetron Sputtering Deposition Method Masaaki Kitano1, Takeshi Kudo 2, Masaya Matsuoka 2 Michio Ueshima1 and Masakazu Anpo*, 2, a 1 Industry-University Cooperation Organization, Osaka Prefecture University 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan 2 Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan a anpo@chem.osakafu-u.ac.jp Keywords: Nitrogen-substituted TiO2, Visible light, RF magnetron sputtering, Thin film, Photocatalyst Abstract.
The band structure of N-TiO2 was also determined by photoelectrochemical measurements and H2 and O2 evolution was carried out from an aqueous solution involving sacrificial reagents.
The band structure of N-TiO2 was also investigated by photoelectrochemical analysis.
The band structure shows a good coincidence with the results of the photocatalytic H2 and O2 evolution reaction from aqueous solution including sacrificial reagents.

Significant changes in lineshape of the FMR spectra between both samples are observed, in particular, the absorption mode in nanopowders have an internal structure which can be associated with magnetostatic modes.
Introduction Yttrium-iron garnet (YIG, Y3Fe5O12) is a complex magnetic oxide with a garnet-type structure; in this material the Y3+ ions occupy the dodecahedral sites, while Fe3+ ions enter the octahedral and tetrahedral sites in the 2:3 ration [1].
In particular, in the nanopowders an internal structure is also observed, and which can be due to magnetostatic modes, and it is associated with spin dynamics in nanostructures.
Zamorano, Materials Chemistry and Physics 130 (2011) 587.

Overall, the utilization of the tensile test shows the maximum stress that the structure can maintain.
Journal Agricultural and Food Chemistry, 58, 5400-5407. doi: DOI:10.1021/jf100317y [7] Liu, X., Yi, X., & Zhu, J. (2018).
Journal of Materials Chemistry, 21, 8256-8268. doi: 10.1039/c0jm04237d [13] Sen, T., & Reddy, H.

It is evident that stickiness is a macroscopic property related to molecular structure, molecular motion, and intermolecular forces inside a fluid.
This property is closely related to the microscopic molecular structure of fluids (according to reference 7).
The polymer structure of heavy oil is very complex and currently its specific structure is still to be determined.
In fact, both pressure and temperature have an impact on the polymer structure, molecular motion, and intermolecular forces of heavy oil.
Due to the complexity and multiplicity of the molecular group structure, the viscosity of heavy oil must be affected by both temperature and pressure.

They may become more chemically reactive or reflect light better or change color as their size or structure is altered.
The structure of C-S-H is much like clay, with thin layers of solids separated by gel pores filled with interlayer and adsorbed water (Mehta, 1986).
This has significant impact on the performance of concrete because the structure is sensitive to moisture movement, at times resulting in shrinkage and consequent cracking if accommodations in element sizes are not made (Jennings et al., 2007).
Another critical issue is related to our understanding of the chemical structure(s) of CMG sheets and their reaction mechanisms.
The better our knowledge of the chemistry of these materials, the better the graphene-based composites, thin films, paper-like materials and so on that we can make.

HSLA-80 steel can be joined by conventional arc welding processes using minimum preheating and interpass temperature, e.g. 60°F for critical and 32°F for general structures [2].
Depending on the chemistry and thermal (e.g. cooling rate, ageing) conditions, hardness values between 225 Hv and 275 Hv have been reported [9], which supports the findings in the present work.
In general, the evolution in the HAZ hardness is attributed to the changes in strengthening precipitates (size and distribution), matrix microstructure (phase constituents and grain size) and dislocation structure.
Navy ship structures is 1.77 and 2.17 kJ/mm for HSLA-80 steel with a thickness less than ½" and ½" or greater, respectively [10].
However, the minimum preheat and interpass temperature for HSLA-80 steel is 60°F (15.6°C) for critical and 32°F (0°C) for general structures [2].