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Online since: October 2023
Authors: Patricia Menéndez, Piera Maresca, Cristina Moreno-Díaz, Cintia Barajas
To do this, the research begins with an analysis of the properties of this product, its production methods, the conditions and factors that influence its growth, and its possible applications.
By creating a suitable growing medium (see Table 1) for Acetobacter xylinum, BC can be obtained with the following characteristics: 1) high water retention capacity, 2) biodegradable and biocompatible, 3) good mechanical properties, 4) high thermal stability, 5) high degree of crystallinity, 6) non-toxic and non-allergenic.
• Temperature, humidity, and acidity of the medium are key factors to consider for proper growth
Bacterial Cellulose Properties and Its Potential Application.
Factors affecting the yield and properties of bacterial cellulose.
Online since: October 2014
Authors: Kung Rong Chen, Yi Da Ho, Cheng Liang Huang
From the experiment results, although defects (especially Nb4+) can strongly affect the dielectric properties of the MNO films under various annealing temperatures, tuning the properties by varying annealing temperatures was not a viable solution.
Parameters of the chemical states, as well as electrical and memory properties are summarized in Table I.
Electrical properties and the Nb4+/Nb5+ ratio of the MNO films at various annealing conditions.
Sebastian, Tailoring the microwave dielectric properties of MgNb2O6 and Mg4Nb2O9 ceramics, Int.
Pullar, The synthesis, properties, and applications of columbite niobates (M2+Nb2O6): a critical review, J.
Online since: October 2021
Authors: Andrey Ponomarev, Ivan Kuznecov, Olga Malyugina, Nilufar Mamatmusaeva, Umida Tillaeva, Botir Daminov, Saida Saidkhodjaeva, Marat Iskandarov
As the oral cavity is abundant in blood vessels and nerves, biomaterial negative properties will manifest quickly and obviously.
Biocompatible material: - has the same properties as a bioinert material, and also provides a healing regenerating effect.
All these factors have a negative effect on TMJ and can result in the loss of osseointegration and atrophy of the jawbone tissues. [24].
Thus, the mechanical factor of irritation is in close etiological and pathogenetic connection with the development of focal and diffuse stomatitis.
The mechanical action of the material changes, depending on the material life, variability of its physical and mechanical properties.
Online since: August 2013
Authors: Gunawan Kapal, M. Baqi, S. Fathernas, Yanuar Yanuar
Figure 1 shows the test of rheological properties.
The viscosity of a non-Newtonian fluid is not constant at a given temperature and pressure but depends on other factors such as the rate of shear in the fluids.
The friction factors of high-concentration solutions data still far to the Virk’s line (B) according to the increase in the Reynolds number, Re.
Drag reduction is significantly affected by the type of fiber and the concentration of fiber.
Advanced in Mechanical Engineering. 2011.
Online since: November 2010
Authors: Aldo Okullo, A.K. Temu, J.W. Ntalikwa, P. Ogwok
Numerous researches have been done to try and optimize the process conditions of biodiesel production from various oils; Gemma et al. [4-6] studied the methanolysis of sunflower using factorial design and Central Composite Design (CCD) with temperature and initial catalyst concentration as the main factors affecting biodiesel purity and yield.
Park et al. [3] investigated biodiesel production from lard using response surface methodology (RSM) with temperature, catalyst concentration and molar ratio of methanol to oil as the main factors affecting the yield of biodiesel.
The factor levels were selected taking in to account, the properties of the materials to be used in real practical work (Table 1).
No Factors Known Factors <=3 Range Known No Yes Yes Find significant factors & interactions Find range by trials Do real expt with design suggested values Real experiment With DOE suggested combinations Survived Significant factors Curvature found?
Mounts, Variables affecting the yields of fatty esters from transesterified vegetable oils JAOCS. 61. (1984) 1638-1643 [13] Noureddini H.
Online since: May 2012
Authors: Wei Wang, Shan Suo Zheng, Pi Ji Hou, Ming Xie
Because of the anchoring properties of reinforcing bar and concrete is far higher than shape steel and concrete, the bond-slip between reinforcing bar and concrete can be ignored, which assumed the calculated deformation of reinforcing bar and concrete is equal to each other.
The result in literature [1] show that the regular of bond-slip is relates to longitudinal factors of SRC component, and the distribution pattern along the height of the cross section based on tests is shown in Fig.5.
In addition,there are other factor affect simulation result, the cross section of concrete should be divided into three areas, and the concrete material of every part should be adjusted.
B-B A-A Fig.6 Dimension of SHPC frame specimen Fig.7 Details of specimen Fig.8 Load curve Table 1 Mechanical properties of steel of test parameter Q235 Q235 A6 B12 flange web flange web HPB235 HRB335 321.0 315.5 319.7 312.4 297.5 384.0 1540 1503 1543 1507 1447 1863 509.9 494.2 491.5 502.5 438.0 557.0 Notes yield stress; yield strain; ultimate strength Application of Proposed Method.
The mechanical properties of steel are shown in Table 1.
Online since: June 2013
Authors: Adrian Manescu, Liviu Marşavina, Cosmin Sinescu, Meda Lavinia Negrutiu, Mihai Rominu, Alessandra Giuliani, Adrian Gh. Podoleanu
In orthodontics, the scientific interest regarding adhesion is focused on optimizing adherents: metallic or aesthetic bracket base conditioning, creating aesthetic brackets with improved mechanical properties, enamel conditioning and artificial surface conditioning (aesthetic veneers and crowns).
Masticatory forces in the molar region are paramount factors of success or failure in molar bonding [2].
Other factors of molar bonding are, operator accessibility, moisture control, bite depth and patient dietary co-operation [2].
Patents provide very little information regarding the dimensions of the bases [12].Factors determining bracket base are: oral hygiene, bond strength and aesthetics [13, 14].
Micro-CT 3D computed reconstruction can be sliced along any direction to gain information on the internal geometric properties and structural parameters of the sample..
Online since: August 2020
Authors: Duangrudee Chaysuwan, Songphop Plaichum, Chayanee Tippayasam, Attaphon Kaewvilai, Thammaros Pantongsuk
They have been offered as an alternative to ordinary Portland cement, with 3D framework structures of silico-aluminate, for use in construction applications due to their excellent mechanical properties [1], and physical properties including high early strength and good thermal resistance [2-4].
The geopolymer microstructure has been shown to strongly affect the mechanical and thermophysical properties [7-9].
Table 5 Physical properties and compressive strength results.
Chaysuwan, Effect of Porosity and Pore Size on Microstructures and Mechanical Properties of Metakaolin Blended with Ca(OH)2 and PLA as Porous Geopolymers, Key Eng.
Kriven, J.S.J. van Deventer, Understanding the relationship between geopolymer composition, microstructure and mechanical properties, Colloids Surf.
Online since: April 2013
Authors: Maria Araújo Fernández, Javier Taboada Castro, Jose Antonio Vilán Vilán, Nuria Sánchez Delgado
The yield for any natural stone cutting process is affected by a number of factors specific to the cutting system (tools, abrasives and coolants, and also factors such as peripheral disk speed, advance speed, depth, vibration, etc.) and the characteristics of the rock itself, whether physical-mechanical (hardness, compressive strength, tensile strength, abrasivity) or petrographic (mainly mineralogy, texture and void spaces).
A detailed review of the influence of factors specific to the cutting system (characteristics of the diamond tools, disk, regime and cutting speed, lubricants, etc.) and the main contributions of various researchers in this field can be found in [1].
The main objective of this phase of the project was to determine the optimal cutting parameters for each of the granite varieties studied (see [9] for a study of the principles of rock cutting technology using diamond tools and the different influencing factors).
The remaining parameters affecting the cut (disc diameter, rotation speed and coolant flow) were set at appropriate constant values.
Note that, in view of the great diversity of marketable granites, and given the not always direct correlation between physical and petrographic properties and behaviour in response to cutting, our findings cannot be generalized beyond the seven varieties described in this article.
Online since: December 2011
Authors: Sheng Li Wu, Juan Zhu, Yuan Du, Guo Liang Zhang, Fang Yi Long
The foundation of agglomeration is liquid, whose properties and quantities influence the index of yield.
The concept of the bonding intensity is proposed, whose influencing factors are analyzed, to provide the theory basis and technical support for efficient use of iron ores.
The bonding intensity affects the sinter mechanical strength directly, further influences the sinter yield and quality indicators.
After melting, the liquid generating by adhesion, on one hand, melts and corrodes on the surface of core ores to change liquid properties on the contact interface.
The higher ratio explains that the factors prejudicing the consolidation are leading.
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