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Online since: October 2011
Authors: Zong Min Tian, Zhi Wei Li, Xu Xiang
The large interlayer spacing leads to interesting intercalation chemistry [3, 4] and electrochemical properties [5, 6].
Then appropriate amount of water (0-50ml) was added to the solution to make the total volume reach 50 ml with mechanical stirring.
Therefore, one can conclude that the phase structure is hardly affected by the pH value during reaction.
And the temperature is a key factor to the formation of different phases.
Online since: March 2022
Authors: Jun Fang, Shi Qiang Lu, Ou Yang Fang, Wen Xuan Shang, Jun Huai Xiang
In addition, springback is affected by process parameters.
Using plastic deformation theory, Li et al. [6] established the theoretical model for springback of tube bending considering tube specifications and material properties.
In previous reports, most studies are usually neglected the variation of elastic modulus with the plastic deformation during tube bending, which will affect the springback prediction accuracy, especially for the high strength 21-6-9 tube with high ratio of yield strength to elastic modulus.
The detailed FE modeling process, mechanical property parameters of high strength 21-6-9 tube, process parameters and so on can be seen in the references [13, 14].
Results and Discussion Using established FE model combined with single factor method, the effects of process parameters on springback of high strength 21-6-9 tube during rotary draw bending were investigated considering variable elastic modulus.
Online since: January 2011
Authors: Jian Gang Shi, Kun Shi
From the ancient structure of beams and columns to the present steel structure, building frame support the structure space and mechanical load for the construction.
Nucleus is the basis of cell proliferation, gene regulation and genetic stability, while the bedroom is the core of real estate model, directly affecting people's living, studying and working.
Everyone in society is independent and unique individual, with particle property of electron.
Both of them represent the energy factors: life events are associated with the flow of energy and matter which a nerve impulse along with neurotransmitter release and membrane potential change, body temperature maintaining with of a series of physiological changes accompanied by mitochondrial respiration, ATP hydrolysis and energy release; in a stable society, human work, relax and rest in proper places and the city operates normally without violence, disorder and chaos, which are the symbols of energy out of control.
Online since: June 2014
Authors: Romain Boman, Jean Philippe Ponthot, Yves Carretta, Maxime Laugier, Maurice Tornicelli, Jakob Ilsted Bech, Nicolas Legrand
Finally, it is shown how this new MPH lubrication model can be implemented in a cold rolling model to maximize mills capabilities, determine optimum rolling oils properties and predict roughness transfer.
The oil film n° 3 can be formed by the plate-out on rolls surface and / or, a recycled film coming from the roll bite exit meniscus, potentially affected by exit roll cooling and passing through the back-up–work rolls contact able to wiping effects.
The ratio between the initial free volumes and entrapped oil quantity is a dominant factor and could create threshold effects.
Due to MPH lubrication, reduction is one of the major factors influencing roll bite friction through the reduction of pocket volume by plastic deformation: the higher the reduction is, the lower the friction is.
¡ Optimum rolling oils properties: to determine optimum rolling oil properties that minimizes friction (so maximizes strip reduction) while stable rolling condition is obtained (positive forward slip).
Online since: February 2020
Authors: Celine Pascal, Thammaporn Thublaor, Somrerk Chandra-ambhorn
However, such steel with good enough mechanical stability had not been realised until H.
The classification of stainless steels is normally based on its structure which closely relates to the steel mechanical properties e.g. ferritic, austenitic, martensitic, austeno-ferritic (duplex) or precipitation-hardened stainless steels.
The maximum service temperature of the steel depends on many factors especially the composition of the hot gas and the loading condition at high temperatures.
(1.40) Electrical mobility of the charged species contributes to many properties of materials, including the electrical conductivity () of material.
In such case Eq. 1.58 can be reduced to be (1.60) From Eqs. 1.59 and 1.60, we can obtain that (1.61) Eqs. 1.60 and 1.61 express that the parabolic rate constant depends on many factors particularly the oxygen partial pressure at the external interface which prescribes the metal vacancy concentration there.
Online since: October 2015
Authors: Wina Maryana, Annisa Rahma, Diky Mudhakir, Heni Rachmawati
A number of risk factors such as viral hepatitis (hepatitis B or C virus), alcohol consumption, certain drugs intake, and fat accumulation in the liver (fatty liver) has been associated with chronic liver diseases.
The consequence of these factors is limited bioavailability of silymarin following oral administration [2].
Some product-influencing variables such as evaporation time, hydration media, hydration time, and temperature were previously studied in order to produce lipid vesicles containing silymarin with desired properties.
It can be concluded that concentration and molar ratio of silymarin to phospholipid are the key factors that influenced successful approach.
Effect of fatty acid composition of phospholipids on their antioxidant properties and activity index.
Online since: September 2007
Authors: Klaus Rätzke, Franz Faupel, V. Zöllmer, A. Bartsch, Andreas Meyer
During the first annealing, these systems undergo structural changes, sometimes termed structural relaxation, where many properties change, e.g., the density increases, the diffusivity decreases and short range order sets in.
Due to the amorphous structure conventional lattice defects like vacancies or dislocations are missing, which leads to several new and interesting properties.
This excellent agreement shows that the present experiments are not affected by convection, in contrast to many previous experiments in metallic melts [11].
Comparing in Fig. 4 the 57 Co diffusivities of this work in the undercooled melt to the ones previously measured in our laboratory, one can see a difference of a factor of two [22, 29].
But this has no influence on our results because the difference of a factor of two is quite small in comparison to the orders of magnitude effects we want to investigate.
Online since: January 2009
Authors: Berend Denkena, Luis de Leon, B. Wang, Dennis Hahmann
The quality factor shows a similar behavior by a variation of Id0.
The limiting factor is that there can only be one discharge at a time.
For the current investigations, vitrified bonded wheels are selected due to their good dressability and profile holding properties compared to other bonding systems [1].
Due to the mechanical load on the vitrified wheel layer during the dressing process, breakouts occur at the profile tip, where the structure strength is not high enough to withstand the dressing force.
A further increase in the dressing parameters does not affect a further increase in the specific material removal rate Q'sd.
Online since: February 2019
Authors: Liliana Sachelarie, Nicoleta Dumitrascu, Adina Rotaru-Birgaoanu, Teodora Teslaru, R. Ionut Olariu, Ionut Chirap
The efficiency of the sealing procedure depends on various factors, from the techniques of enamel surface preparation to the quality of bonding agents, dentists’ skills and clinical conditions, including the diet and oral hygiene of the patient [4, 5].
In practice, one may use various kinds of sealants, well-defined according to their composition (presence of fillers and coloring agents), polymerization method, physical properties (mechanical strength, elasticity, viscosity and aging), technique of application, costs etc. may be applied [12, 13].
One important tooth property that may affect sealant retention is its surface morphology, a higher roughness being beneficial for the mechanical preservation at the surface, improving sealant bonding to the enamel [14, 4].
Skin Melanin, Hemoglobin, and Light Scattering Properties can be Quantitatively Assessed in Vitro Using Diffuse Reflectance Spectroscopy.
Optical properties of enamel and translucent composites by diffuse reflectance measurements.
Online since: December 2012
Authors: Marco Valente
The structure was designed according to the provisions of Eurocode 8 for a peak ground acceleration (PGA) equal to 0.35g with a type 1 response spectrum, ground type A, 5% viscous damping and behaviour factor q=6.
In the numerical models of the frame the different values of the conventional shear connection degrees η=N/Nf are achieved by retaining the position of the studs and changing their mechanical properties.
The change of the shear connection degree only slightly affects the global behaviour of the composite frame in terms of roof displacement and base shear.
Showing 25431 to 25440 of 26166 items