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Online since: August 2018
Authors: Jana Daňková, Tereza Majstríková, Miroslava Škopcová
Introduction A wooden matrix is subjected to various corrosion processes, depending on the location of the wooden element and the nature of the environment which gradually changes its chemical composition, structure and original properties.
Vasile, Thermal degradation of lignin – a review, Cellulose chemistry and technology Vol. 44 (2010) 353-363
Lim, Fine structure and X-ray microanalysis of silicified woods from a Tertiary basin Pohang, Korea by scanning electron microscopy, Micron Vol. 40 (2009) 519 – 525
Kuczumow, Composite structure of wood cells in petrified wood, Materials Science and Engineering: C Vol. 25 (2005) 119 – 130
Babiak, Štruktúra a vlastnosti dreva (Structure and properties of wood), PRÍRODA, Bratislava, 1997
Online since: February 2012
Authors: Cristina González Gaya, José M. Arenas Reina, Prado Díaz de Mera Sánchez
Incremental or continuous innovation are reflected in continuous improvement advocated by Masaaki Imai [19] in the Kaizen strategy, conducted within the existing structure and provide a small and gradual economic growth.
This limitation is particularly true in the fields of biotechnology or chemistry
Lean Manufacturing and the way to develop software proposed by scrum, have many differences, team size, structure necessary to create products, costs to develop a production facility, raw materials needed to produce the product, dependence on suppliers and subcontractors, but are striking similarities between both.
In both disciplines the team's organizational structure is essential.
Some authors argue that Lean Manufacturing [20] encourages learning beyond the professional skills and apply this creativity in a team structure rather than a hierarchical structure.
Online since: October 2017
Authors: Allam Musbah Al Allam, Mohd Idrus bin Masirin, Ahmad Suliman B. Ali
Moreover, Qin et al. [2] are mentioned that the aging may significantly alteration the rheological properties and cause asphalt hardening, hence; it is importance to have a good comprehension the changes in rheology and structure of asphalt binders under aging environments.
It can be noted that short-term ageing had a higher values compared to unaged samples, this suggests that the exposure time and temperature situations influence the flow behavior of the asphalt binder, which might be because of the changes in the molecular structure of asphalt binder by aging.
Equally important, the addition of BPSC had a significant impact on the compatibility of modified asphalt binder. 10.61µm 9.49µm Fig. 6: Particles sizes of 4% BPSC modified binder As shows in Table 7 the major ions such as sodium, chorine, silicon and sulfur constitute the layer, and this structure has high expansion pressure.
[2] Qin, Q., et al., Field aging effect on chemistry and rheology of asphalt binders and rheological predictions for field aging.
[18] Sureshkumar, M.S., et al., Internal structure and linear viscoelastic properties of EVA/asphalt nanocomposites.
Online since: December 2016
Authors: Jana Vecstaudza, Janis Locs
For instance, low crystalline CaP with apatitic structure prepared from solutions had higher SSA if the Ca/P ratio was lower [12].
Freeze-dried ACP were characterized for their structure, SSA, crystalline phases formed after heat treatment for 1h at 1100 °C, particle size and morphology.
Higher Ca/P ratio could be reached by prolonged synthesis times or maturation of precipitates in synthesis solution because calcium ions could adsorb and enter into the structure of CaP.
Chemical structure.
Gower, Bone structure and formation: A new perspective, Mater.
Online since: June 2014
Authors: Frederic de Geuser, Alexis Deschamps, Eva Gumbmann, Christophe Sigli, Williams Lefebvre
Atom-probe tomography characterization shows that Mg and Ag are found in the chemistry of the T1 hardening phase [19].The objective of the present study is to further investigate the precipitation kinetics of Al-Cu-Li, with or without small amounts of Mg and/or Ag.
Ardell, „On the Crystal Structure and Stability of the T1 Precipitates in Aged Al-Li-Cu Alloys“, 1987
Bronsveld, „Refinement of the crystal structure of hexagonal Al2CuLi“, J.
Deschamps, „Atomic structure of T1 precipitates in Al–Li–Cu alloys revisited with HAADF-STEM imaging and small-angle X-ray scattering“, Acta Mater., Bd. 59, Nr. 2, S. 462–472, Jan. 2011
Muddle, „Structure and energetics of the coherent interface between the θ′ precipitate phase and aluminium in Al–Cu“, Acta Mater., Bd. 59, Nr. 18, S. 7043–7050, Okt. 2011
Online since: December 2014
Authors: Dan Li, Wei Xin Luan, Lin An Du
Marine economy is relative to the land in economic terms, the most fundamentalbasisto dividethe two economic systems is the difference of entities producing objects and spatial division,various types of industrial sector there are also significant differences.With the advancement of science and technology and human gradually raise awareness of marine, development and utilization of marine resources has transformed to develop a comprehensive space, chemistry, energy, biotechnology, marine mineral resources, from the simple acquisition of marine primary products, marine industrial system gradually improved.
(Tab. 1) Tab.1 The evaluation system table of provincial economy’ comprehensive competitiveness index Target layer criteria layer solution layer index layer The comprehensive competitiveness of the coastal areas Economic development strength Economies scale GDP(100 million yuan) Industrial Structure The third industry accounted for the proportion of GDP(%) Financial strength The government's total fiscal revenue(100 million yuan) Economic efficiency Labor productivity in the production of the whole society(Yuan / person) Investment capacity Investment in Fixed Assets(100 million yuan) The level of social development The level of urbanization The urban population accounted for the proportion of the total population (%) The wage of employment The average wage of the social employment(yuan) Human Resources Number of employees(10 thousand people) The trade flow capacity Radiation Total exports(100 million dollar) Aggregation ability Total imports(100 million dollar) Construction of transport
Therefore, this paper calculate the weight of the hierarchical structure evaluation index using AHP analysis method, combined with the characteristics of the economic development of coastal provinces andthe relative importance amongthe component factors comprehensive competitiveness.
This paper applies process AHP to weight 14 indexes with hierarchical structure.
In the 14 indexes, economy scale, economy efficiency, human resource and industrial structure weight higher, which states that the 4 indexes influences comprehensive competitiveness more outstandingly
Online since: April 2018
Authors: Suthee Wattanasiriwech, Darunee Wattanasiriwech, Ju Hak Lee
Nucleation and stability of the pore structure in the fresh geopolymer paste strongly depends on the viscosity of the initial mix.
However, cellular structure of thermal insulating geopolymer foam may lead to the inferior mechanical performance limiting its use especially in load bearing applications.
In order to obtain the three dimensional framework structure with Si: Al of 2:1 following ref[18], 100 g of metakaolin was mixed with 201.7 g of the mixed liquid potassium silicate.
Davidovits, Geopolymer chemistry and application, Institut Geopolimére (2011), pp. 283, 286
Wang, Fly ash-based geopolymers: the relationship between composition, pore structure and efflorescence, Cement and Concrete Research, 64 (2014) 30–41
Online since: March 2013
Authors: A. Ishak, Mohamad Hafiz Mamat, Mohamad Rusop
However, the undoped of a-C is found as weakly p-type in nature, complex structure and existing a high density of intrinsic defect [1] which contributed to low conductivity of thin films amorphous semiconductor and therefore barrier for p-n junction solar cell applications.
All surfaces showed no granular structures are existed but with agglomerated particles.
Material Chemistry and Physics 125 (2011) 434-439
[16] Peng Wang, Xia Wang, Youming Chen, Guangan Zhang, Weimin Liu, Junyan Zhang, The Effect of applied negative bias voltage on the structure of Ti-doped a-C:H films deposited by FCVA, Applied Surface Science 253 (2007) 3722-3726
Tay, Electrical behavior of metal/tetrahedral amorphous carbon/metal structure, Solid State Electron 43 (1999) 427.
Online since: April 2020
Authors: Marta Yusfita Sari, Endang Saefudin, Fitri Fagatella
In this study, fucoidan was explored and utilized as mycotoxin binder due to its structure with unique features of sulfate group and its dietary fiber property, which is a non-digestible fiber so that the toxin bound will be carried out through the stool.
Bioactivity of fucoidan is strongly influenced by the number of sulfate groups in their structure, which are the ion negative involve in hydrogen bonding to form between fucoidan complex that is supposed to be responsible for binding interaction with mycotoxin especially T-2 toxin in this study.
Agili, Antiviral sulphated polysaccharide from brown algae Padina pavonia aharacterization and structure elucidation.
Thanh, Primary structure, conformation in aqueous Solution, and intestinal immunomodulating activity of fucoidan from two brown seaweed species Sargassum crassifolium and Padina australis, Carbohydr.
Zhao, Fucoidan: Structure and bioactivity.
Online since: October 2014
Authors: Nikolay Kedin, Gennadii Shveikin, Irina V. Nikolaenko
The SEM images of dioxide tungsten particles with monoclinic structure presented in Fig. 4 show that microwave heating leads to the formation of particles with different shapes while the use of a furnace with conventional heating and argon flow results in elongated particles with a shape of "french fries".
What we are seeing, depending on the condition of the reduction we observe the formation of tungsten dioxide particles of different shapes but with the same crystal structure.
According to the XRD data the final product of carbidization is single-phase WC with hexagonal structure (Р-6m2, а= 2.906 Å, c= 2.837 Å).
Li, Nanochain- Structured Mesoporous Tungsten Carbide and Its Superior Electrocatalisis, J.
Nikolaenko, Thermally stimulated conversion of micellar structure of tungsten glycolate in to nanosized tungsten carbide, Doklady Academii Nauk 434 (2010) 200-203 (in Russian).