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Online since: July 2016
Authors: Elvis K. Tiburu, Heidimarie N.A. Fleischer, Edmund O. Aidoo, Ali Salifu, Bernard O. Asimeng, Han Zhou
The arrangements of atoms in the zeolite framework can influence the structural properties of these materials and as a result could impart biological activity [9-11].
To accomplish the desired properties various variables including the source of the reactant material, temperature, aging, mode of crystallization, crystallization time as well as pH conditions must be carefully controlled.
To be accepted for biomedical applications, zeolites must provide superior biological activity and display comparable physical properties when compared to other nanomaterials.
The purpose of this study was to compare the shape, size, surface characteristics, and physical properties of zeolite A (Linde type A) synthesized and crystallized at two temperatures to investigate their biological activity towards HeLa cancer cell lines.
The current studies was intended to investigate whether LTA with Si/Al≈1 could serve as an absorbent of essential cell growth factors from culture media leading to deprivation of minerals for cell growth.
To accomplish the desired properties various variables including the source of the reactant material, temperature, aging, mode of crystallization, crystallization time as well as pH conditions must be carefully controlled.
To be accepted for biomedical applications, zeolites must provide superior biological activity and display comparable physical properties when compared to other nanomaterials.
The purpose of this study was to compare the shape, size, surface characteristics, and physical properties of zeolite A (Linde type A) synthesized and crystallized at two temperatures to investigate their biological activity towards HeLa cancer cell lines.
The current studies was intended to investigate whether LTA with Si/Al≈1 could serve as an absorbent of essential cell growth factors from culture media leading to deprivation of minerals for cell growth.
Online since: April 2012
Authors: Franz Roters, Dierk Raabe, Nicola Peranio
However, a few significant differences were also found for both annealing methods: (i) The volume fraction of recrystallized ferrite at the center of the sheet was found to be by a factor of two larger after annealing in salt bath than after conductive annealing, Figs. 4, 6, which indicates less recovery and thereby a reduction of strain energy as driving force for recrystallization.
Phase transformation was found to be dominant at annealing temperatures larger than 740°C and yielded a dramatic effect on microstructure and therefore on mechanical properties.
The difference might be explained by several factors.
These last two observations are closely related to the factors which determine the incubation and recrystallization times.
Therefore, pearlite is affected by phase transformation before ferrite.
Phase transformation was found to be dominant at annealing temperatures larger than 740°C and yielded a dramatic effect on microstructure and therefore on mechanical properties.
The difference might be explained by several factors.
These last two observations are closely related to the factors which determine the incubation and recrystallization times.
Therefore, pearlite is affected by phase transformation before ferrite.
Online since: July 2022
Authors: Michael F. Zaeh, Thomas Merk, Avelino Zapata, Christian Bernauer
At the transition to the substrate, there is only a small heat-affected zone, which indicates only minor damage to the substrate material due to the process.
As a key factor for the deposition of sound layers, the distance between adjacent weld beads was varied for different parameter sets.
In this context, in-depth investigations of the mechanical and microstructural part properties will also be performed.
Zhang, Additive manufacturing of metallic components – Process, structure and properties, Progress in Materials Science 92 (2018), pp. 112–224
Thompson, An overview of Direct Laser Deposition for additive manufacturing; Part II: Mechanical behavior, process parameter optimization and control, Additive Manufacturing 8 (2015), pp. 12–35
As a key factor for the deposition of sound layers, the distance between adjacent weld beads was varied for different parameter sets.
In this context, in-depth investigations of the mechanical and microstructural part properties will also be performed.
Zhang, Additive manufacturing of metallic components – Process, structure and properties, Progress in Materials Science 92 (2018), pp. 112–224
Thompson, An overview of Direct Laser Deposition for additive manufacturing; Part II: Mechanical behavior, process parameter optimization and control, Additive Manufacturing 8 (2015), pp. 12–35
Online since: September 2013
Authors: Stefano Podestà, Federica Pompejano, Gerolamo Stagno
Mechanical Properties of Materials
As specified in the Italian "Guidelines for evaluation and mitigation of seismic risk to cultural heritage" [7] and on the Italian UNI standards formulated by the “Beni Culturali – Normal” Technical Committee, preliminary visual analysis and some non-destructive diagnostic tests may contribute to an adequate level of knowledge of the state of conservation of the structure and help to get an opinion on the quality of the materials and their degradation.
To each factor considered in the visual inspections, a representative score (from 0 to 1) of the conservation state of each investigated element, has been proposed in order to obtain a synthetic parameter calculated as a weighted average based on the scores assigned previously.
In case of significant discrepancy, between the grades obtained with the visual inspection summed up by the preservation index, and the results of the Resistograph test, the performance class values may be penalized through a confidence factor that we assumed, in the structural analysis, close to 1.2.
However, the approach propose to operate on a limited but representative sample of the structure elements, that even if could affect, in terms of safety, the evaluations, represents the approach that usually is followed during the acquiring knowledge phase for any other existing building.
[3] Decision WHC-05/29.COM/8B,”Nominations of properties to the World Heritage List”, p. 21, UNESCO, June 2005.
To each factor considered in the visual inspections, a representative score (from 0 to 1) of the conservation state of each investigated element, has been proposed in order to obtain a synthetic parameter calculated as a weighted average based on the scores assigned previously.
In case of significant discrepancy, between the grades obtained with the visual inspection summed up by the preservation index, and the results of the Resistograph test, the performance class values may be penalized through a confidence factor that we assumed, in the structural analysis, close to 1.2.
However, the approach propose to operate on a limited but representative sample of the structure elements, that even if could affect, in terms of safety, the evaluations, represents the approach that usually is followed during the acquiring knowledge phase for any other existing building.
[3] Decision WHC-05/29.COM/8B,”Nominations of properties to the World Heritage List”, p. 21, UNESCO, June 2005.
Online since: August 2015
Authors: Elisabeth M. Yoshimura, Daniel Palacios, Lászlo Sajó-Bohus
LR-115 recording properties of the LR-115 track detector
2.3.
Furthermore, radon-thoron contour maps provide useful data to understand physical properties and characteristic field conditions that influence release and movement of Rn-gas isotopes.
Soil radon activities measured at surface conditions depend mainly upon factors such as: the emanating power of the rock and soil [24], the permeability of the host rock and the flow of the carrying gas [25].
LR-115 recording properties: Alpha tracks studies if based on measurements of diameters of surface and bottom track openings, provide energy window value for calibration simulation.
Once all these factors are identified and required corrections are applied, then the system is in its optimal parameters.
Furthermore, radon-thoron contour maps provide useful data to understand physical properties and characteristic field conditions that influence release and movement of Rn-gas isotopes.
Soil radon activities measured at surface conditions depend mainly upon factors such as: the emanating power of the rock and soil [24], the permeability of the host rock and the flow of the carrying gas [25].
LR-115 recording properties: Alpha tracks studies if based on measurements of diameters of surface and bottom track openings, provide energy window value for calibration simulation.
Once all these factors are identified and required corrections are applied, then the system is in its optimal parameters.
Online since: March 2008
Authors: H.R. Sinning, Igor S. Golovin, S.A. Golovin, V.A. Semin, G.V. Serzhantova, Olga A. Sokolova, S. Jäger, F. Stein
Carbon-containing Fe - Si and Fe - Si - Al alloys were studied with respect to the carbonrelated
Snoek-type and Zener relaxation using different mechanical spectroscopy techniques.
Introduction Alloying elements in iron affect carbon atom diffusion and distribution in the solid solution and between solid solution and carbides.
In order to avoid texture effects, all specimens for mechanical properties testing were cut from the central area with equiaxed grains.
The Arrhenius plot for the carbon Snoek peak in αFe quenched from 1000 K yields an activation energy H = 0.84 ± 0.02 eV and a value for the preexponential factor in the Arrhenius plot of the relaxation time τ0 ≈ 4.7 × 10 -15 s.
San Juan, in: Mechanical Spectroscopy Q-1 2001, edited by R.
Introduction Alloying elements in iron affect carbon atom diffusion and distribution in the solid solution and between solid solution and carbides.
In order to avoid texture effects, all specimens for mechanical properties testing were cut from the central area with equiaxed grains.
The Arrhenius plot for the carbon Snoek peak in αFe quenched from 1000 K yields an activation energy H = 0.84 ± 0.02 eV and a value for the preexponential factor in the Arrhenius plot of the relaxation time τ0 ≈ 4.7 × 10 -15 s.
San Juan, in: Mechanical Spectroscopy Q-1 2001, edited by R.
Online since: February 2016
Authors: Klaus Funke
In their 1914 paper, Carl Tubandt and Erich Lorenz reported on the extraordinary properties of the alpha phase of silver iodide.
Lehmann had classified the high-temperature phase of silver iodide as the only inorganic material displaying the properties of a liquid crystal.
Apparently, many of those microstructures were still present after the β to α phase transformation, then affecting (reducing) the measured Joule losses.
VSWRmax and VSWRmin are unique functions of the absolute values of the complex transmission and reflection factors of the sample assembly, |t| and |r|, which are thus experimentally accessible.
As will be seen in the following Section, α-AgI does, however, assume more ‘solid-like’ dynamic properties, when it is stabilized below 147 °C, which is possible by confinement in glass.
Lehmann had classified the high-temperature phase of silver iodide as the only inorganic material displaying the properties of a liquid crystal.
Apparently, many of those microstructures were still present after the β to α phase transformation, then affecting (reducing) the measured Joule losses.
VSWRmax and VSWRmin are unique functions of the absolute values of the complex transmission and reflection factors of the sample assembly, |t| and |r|, which are thus experimentally accessible.
As will be seen in the following Section, α-AgI does, however, assume more ‘solid-like’ dynamic properties, when it is stabilized below 147 °C, which is possible by confinement in glass.
Online since: May 2012
Authors: Chao Li, Kuang Yi Zhan, Zhen Yu Xie
The climate suitability of double-skin wall for high rise building
The categories of double-skin used in the design and practice of the high rise are various, while the application of double-skin technology is based on the balance between the climate elements and the function characteristics, thus taking into consideration the influence of different factors is necessary, among them, regional environment and the building orientation are the most important parts.
The chimney effect of the glass double-skin could not satisfy the requirements of heat dissipation in summer, so the auxiliary shutter and the mechanical exhaust are in need.
Because some parts of the cold region and the hot summer and cold winter region need to emphasize the thermal insulation and heat preservation, the heat regulation double-skin which possesses the double property is suitable to be used in this region.
The heat gain of the east and west are relative high, but the east gains heat from the sunrise(7:00—9:00), in the case of losing of interior heat in the evening, even gaining a large amount of solar radiation will not largely impact the comfort of the interior; On contrast, the west elevation absorbs the heat at 15:00 and the west solar radiation will badly affect the comfort of the interior environment on the basis of the all-day thermal cumulation.
The chimney effect of the glass double-skin could not satisfy the requirements of heat dissipation in summer, so the auxiliary shutter and the mechanical exhaust are in need.
Because some parts of the cold region and the hot summer and cold winter region need to emphasize the thermal insulation and heat preservation, the heat regulation double-skin which possesses the double property is suitable to be used in this region.
The heat gain of the east and west are relative high, but the east gains heat from the sunrise(7:00—9:00), in the case of losing of interior heat in the evening, even gaining a large amount of solar radiation will not largely impact the comfort of the interior; On contrast, the west elevation absorbs the heat at 15:00 and the west solar radiation will badly affect the comfort of the interior environment on the basis of the all-day thermal cumulation.
Online since: December 2013
Authors: Shou Jun Cao, Jian Feng He, Lei Ma
In addition, the data scattered in different departments is lack of standardization, and info sharing is unable, which causesreluctant info deficiency and asymmetric problems of energy management [1].Moreover, with the increase of application demands and serviceable cycle, the quantity of data processing and complexity are dramatically climbing up.Previous management style can’t suit the requirement of energy management with the fast growth of economy and society due to some unavoidable factors such as space-time misplacement of supply and demand, the increment of proruption and uncertainty, shortened period and enlarged influence [2].
The core objective of index management is to establish systems of energy statistic index, energy consumption statistic index, monitoring and assessment, and energy forecast index. 1.3 Monitoring and early warning analysis system The energy status function can be evaluated simply and directly to effectively monitor the status, assess the scope and degree affected by the periodic fluctuation of energy, and reveal early warning signals [4], based on the integrated index and diffuse index of prosperity analysis, and the selection and establishment of early warning signal index and lights with functions of evaluation and prediction for the trend of prosperity.
It also can cover simple functions of data processing, such as cleaning, integration and property stipulation.
[5] Seung Woo Lee, So Jeong Nam,Jai-Kyung Lee et al.Real-time data acquisition system and HMI for MES [J].Journal of Mechanical Science and Technology.26(2012)2381-2388
The core objective of index management is to establish systems of energy statistic index, energy consumption statistic index, monitoring and assessment, and energy forecast index. 1.3 Monitoring and early warning analysis system The energy status function can be evaluated simply and directly to effectively monitor the status, assess the scope and degree affected by the periodic fluctuation of energy, and reveal early warning signals [4], based on the integrated index and diffuse index of prosperity analysis, and the selection and establishment of early warning signal index and lights with functions of evaluation and prediction for the trend of prosperity.
It also can cover simple functions of data processing, such as cleaning, integration and property stipulation.
[5] Seung Woo Lee, So Jeong Nam,Jai-Kyung Lee et al.Real-time data acquisition system and HMI for MES [J].Journal of Mechanical Science and Technology.26(2012)2381-2388
Online since: October 2023
Authors: Elisabeth Nugrahini, Sulistyo Saputro, Wirawan Ciptonugroho, Endang Susilowati, Lina Mahardiani
Making adsorbents using activated carbon has advantages, including high surface area, high mechanical strength, relatively small pore size, porous structure, and high level of elastic modulus [12].
The iron oxide with a reactive surface, a large specific surface area, and magnetic properties of the iron oxide particles allow for rapid magnetic separation after the adsorption process.
The literature study found that the pH of a solution is a crucial factor that affects the ability of an adsorbent to remove pollutants from water or wastewater.
By harnessing its potential, we can contribute to sustainable practices, waste reduction, and the development of carbon-based materials with enhanced properties.
The influence of the texture and surface properties of carbon adsorbents obtained from biomass products on the adsorption of manganese ions from aqueous solution.
The iron oxide with a reactive surface, a large specific surface area, and magnetic properties of the iron oxide particles allow for rapid magnetic separation after the adsorption process.
The literature study found that the pH of a solution is a crucial factor that affects the ability of an adsorbent to remove pollutants from water or wastewater.
By harnessing its potential, we can contribute to sustainable practices, waste reduction, and the development of carbon-based materials with enhanced properties.
The influence of the texture and surface properties of carbon adsorbents obtained from biomass products on the adsorption of manganese ions from aqueous solution.