Search results

The effectiveness of the use of structures made of wood-polymer composites lies in ensuring their stability and durability both under wide temperature and humidity fluctuations and under biological action.
So, one of the directions of using wood is its use as thermal insulation materials, which are intended for thermal insulation of enclosing structures of buildings and structures, technological equipment and pipelines.
The molecular structure of the obtained HAp particles was investigated by Fourier transform infrared spectroscopy (FT-IR), its crystal structure was analyzed by X-ray diffraction (XRD), and its morphology was investigated by scanning electron microscopy (SEM).
The molecular structure of the PLA-PCL polymer matrix was investigated by FT-IR analysis.
Kesmez, Preparation of anti-bacterial biocomposite nanofibers fabricated by electrospinning method, Journal of the Turkish Chemical Society, Section A: Chemistry, 7 (1) (2020) 125–142

Moreover, given the extraordinary variety of antennae structures, is there any common structural motif promoting such effects?
The quaternary structures fall into two distinct families, labelled open and closed, where the arrangement of the two halves of the heterodimer are transformed by a large rotation. [25,26] PC645 and PE555 have a close and an open structure, respectively.
In the closed structure of PC645 the chromophores are indeed closely associated.
Allen, Crystal structure of the bacteriochlorophyll a protein from Chlorobium tepidum, J.
Plenio, Exploiting Structured Environments for Efficient Energy Transfer: The Phonon Antenna Mechanism, J.

Polypeptide chain formation from three amino acids, giving a structure with new properties.
However, energy distributions with gaps have integrin (Fig.7b) and tubulin (Fig.7c), because their secondary structures have not only alpha helix but also beta plain and random structure.
This looks like reasonable, because both structures have the same secondary structure - alpha helix.
Why random structure of tubulins, why not their alpha helixes?
Forsterling, Principles of Physical Chemistry, John Wiley & Sons,Chichester (2000) [6] G.A.

Amorphous calcium phosphate (ACP) with a Ca/P atomic ratio less than 1.5 and dicalcium phosphate dihydrate (DCPD) were prepared by conventional double decomposition technique using wet chemistry.
As we can see in the Fig. 1, the structure of final product of two formulations are similar to structure of natural bone mineral.
The chemical composition and structure of the CPC component after full conversion is the same in both formulations with both forming a low crystalline apatite similar to structure of natural bone mineral.
It has been demonstrated that this bone mineral apatitic structure accelerates in-vivo cellmediated remodeling.
However, the final chemical composition and crystalline structure of both formulations were the same, and similar to the structure of natural bone mineral.

After the extension and application of the key preparation technology, the authors group has developed the rare earth tungsten electrode materials and rare earth tungsten products, and the adjustment of industrial structure and upgrading of the product been realized.
Mingyue Zhao [8] et al. further studied the influence of adding rare earth Y2O3, Y and La to the sintering behavior of tungsten, and found that Y mixed alloy can get finer grain structure, density close to the theoretical density.
But tungsten with body centered cubic crystal structure is a kind of metal material hard to processing.
The biggest advantage of this technique is that you can production of homogeneous structure, complex geometry, and high-performance mechanical parts automatically and continuously.
Plasma Chemistry and Plasma processing, 1990, 11(1): 81

Then we studied the pore structure of cement compositely mixed with admixtures, including high titanium slag, furnace slag, fly ash and limestone.
It can be seen that the structures of cement pastes were denser in (d) and (f), comparing with (c) and (e).
Acknowledgements I would like to express my gratitude to the national “973” projects “cement prepared with low energy consumption and basic research of high efficiency application” (Project No., 2009CB623104), and “physics and chemistry of optimization of composite cement clinker and supplementary cementing materials” (Project No., 2009CB623104-1).
Strength, pore structure and permeability of alkali-activated slag mortars.
Mechanical activation of granulated blast furnace slag and its effect on the properties and structure of portland slag cement.

The cinnamaldehyde structure consists of an aldehyde and alkene structure conjugated with a benzene ring so that it can form a new compound.
This structure indicates the aromatic behavior of the compound, which is further supported by the presence of aromatic protons in the 1HNMR spectrum. 1HNMR spectra provide very important information about the structure of compounds and the nature of their aromatic systems.
The structure of the target molecular compound is shown in Figure 7.
Structure of the target molecular compound Table 1.
Shetty, “Naphthyl-Based Chalcone Derivatives: A Multifaceted Player in Medicinal Chemistry,” ChemistrySelect, vol. 9, no. 19, 2024, doi: 10.1002/slct.202400522

The functionalization is intended to assist the proton pathways in the membrane structure [3].
Furthermore, the sulfonation process does not change to destroy the GO structure [16].
The dense structure in the membrane structure hinders the permeability [10].
The surface structure of the CS membrane showed a dense structure with no pinholes and cracks.
The composite membrane of CS/SPEEK/SGO revealed the compact structure as the CS membrane structure.

Sintering Problems during Preparation of Ti-Al-Si Alloys KNAISLOVÁ Anna1,a*, NOVÁK Pavel1,b and PRŮŠA Filip1,c 1Department of Metals and Corrosion Engineering, University of Chemistry and Technology Prague.
The resulting structure is very porous [15-18].
Advantages of Spark Plasma Sintering process are obtaining of fine-grained and non-porous structure [22, 28].
The aim of our further work was to obtain the homogenized structure with low porosity.
Iron and nickel contamination from the vibrating laboratory mill was found in the structure.

The intracellular and extracellular response of osteoprogenitor cells results in rapid formation of osteoid bridges between particles, followed by mineralization to produce mature bone structures.
Additional confirmation of the 3-D structure of the bone nodules was obtained by Xynos et.al using confocal scanning laser microscopy.(48) The 3-D structure of the nodule was mapped to show the presence and organisation of the type I collagenous matrix and calcium deposition within the bone nodules.
West, "Biological Applications of Bioactive Glasses", Life Chemistry Reports, Vol. 13, 187-241 (1996) 20.
Kokubo, "Surface Chemistry of Bioactive Glass-Ceramics," J.
Hench "Low Temperature Synthesis, Structure and Bioactivity of GelDerived Glasses in the Binary CaO-SiO2 System