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The cell assembly technology skillfully combined with the sol/gel transition mechanism about chemical and physical crosslink of gelatin-based hydrogels, in consideration of the main forming factors, through controlling the extruded materials rheological properties and optimizing the forming process, thereby achieved a promising assembling process with high cell survival rate and its corresponding biological viability.
In the sol state, they can be crosslinked into a gel by changing or adding some exterior factors (i.e., temperature, ultraviolet, chemical agent).
Compare to the physically crosslinked gels, the chemically crosslinked gels usually provide a more stable physical/chemical performance with better mechanical properties because of their stronger bonds [18].
Gelatin, a degradation product of collagen, exhibits reversible thermosensitive gelation properties and can be irreversibly crosslinked with glutaraldehyde.
The main factors affecting this process are gelation time and conglutinate property.

FSP function area formed a uniform density composite layer, of which internal coating layer formed superfine crystal structure and crystal structure of substrate changed, improved the mechanical properties.
The plastic deformation generated by friction stir processing directly influenced the microstructure and mechanical properties.
Defined plastic deformation variable F as a combination of four factors in the process of FSP, include stirring head rotation speed r, horizontal feed speed v, stirring passes n and vertical depth change ∆h.
F directly affected the change regularity of microstructure morphology and mechanical properties.
Detector characterization Cut the affected zone horizontal cross section in metallographic cutter, inlaid the metallographic specimen in XQ-2B inlaying machine, then mechanical grind, polished, chemical etched in 5% nitric acid alcohol liquor.

Through selecting the proper ratio of fly ash, cement, water, and right amount of sodium silicate additives, the author made high content of fly ash cement wet shotcrete materials, and tested their main physical properties, mechanical properties and technical performance, a type of environment-friendly underground wet shotcrete is developed.
The Ratio of Wet Shotcrete Support Materials Fly ash, sodium silicate and cement are chosen as the main raw materials, and clean water is chosen as water source, by mixing experiment, found the factors that affect the performance of high content of fly ash cement new wet shotcrete material, determined the standard condition of each factor, the best proportion of materials and the process.
Main Physical Properties Density.
The influence of fly ash, cement and water on stone rate Main Mechanical Properties Compressive Strength.
Accordingly, various factors need to be considered comprehensively, and the position of mixing point, nozzle shapes and sizes may be changed.

The Effect of Pb2+ and Cd2+ Addition to Mechanical Properties of Fly Ash Geopolymer Paste WARIH Supriadi1, 4, a*, SUBAER2, 4, b, RIDHO Bayuaji3, 4, c, R.Y.P.
The additional heavy metals ions to geopolymeryzation process will affect the geopolymer mechanical properties [1].
This research was carried out to investigate heavy metal ions influence to geopolymer paste mechanical properties especially at compressive strength and immobilization properties.
Properties of fly ash.
Several factors may affect the compressive strength of the geopolymer paste.

The specific characteristics of FIMEC are: 1- the high simplicity of the apparatus; 2- the possibility to get information about the local material properties on a scale large enough to include many grains (data represent bulk characteristics and are not influenced by those factors which dramatically affect micro- and nano-indentation tests); 3- the large versatility in industrial applications such as the control of welding quality, 4- the on-line monitoring of forging or extrusion processes etc..
Recently, FIMEC was also employed to measure the mechanical properties of human dentine [9].
The main characteristics of the FIMEC test are: 1- small material volume involved in each test; 2- simplicity of instrumentation and data processing; 3- non destructive examination; 4- determination of the main mechanical properties of the material; 5- possibility to determine the local properties of mechanical parts of complex geometry, 6- possibility to investigate the specific mechanical properties of molten zone and heat affected zone of welded joints.
This method permits to draw up a pre-normative to use FIMEC for determining the mechanical properties.
Originally, it was realized for investigating the mechanical properties of irradiated materials, however later it has been successfully used in other fields.

On increase in mechanical properties and resistance to deformation they settle down in the following sequence: Ti3AlC2/TiC-Ti4AlN3/TiN-Ti3SiC2/TiC.
In these ternary MAX-compounds the best properties of metals and ceramics are combined.
On background of these features of nanolaminates two factors are affecting mainly the behavior at mechanical loading: presence of porosity and presence of the second phase particles.
In other words, mechanical properties and resistance of these materials to mechanical force are reduced.
If the presence of second phase is lower than 20 % (vol.) the primal factor determining the high-temperature mechanical properties is porosity: its increase results in decrease in strength and increase in plasticity.

Factors affecting heating rate and contact tip temperature during welding have been described.
Heating of the welding torch contact tip causes changes in the structure and physical properties of the material of which it is made.
A large number of different factors affect heating rate and temperature of the contact tip: - method of energy deposition (steady-flow process or pulse-arc process of arcing [6]); - welding modes (current, voltage, welding speed, wire feed speed, volume and speed of shielding gas efflux, etc.); - physical properties of contact tip material (copper, composite copper-based material, copper alloy, etc.); - physical properties of welding wire material; - physical properties of shielding gas (active, inert, gas mixtures [6]); - geometric characteristics of the contact tip and details of the welding torch (tip diameter, gas inlet nozzle diameter, tip length, etc.); - design features of the welding torch and the device for feeding materials that improve weld joint quality into the welding zone or weld pool [7].
Potapievsky, Welding in carbon dioxide, Moscow, Mechanical Engineering, 1984
Kochergin, Contact welding, Leningrad, Mechanical Engineering, 1987

SOLUTION TREATMENT TEMPERATURE AND TIME, QUENCH PROCESS AND MEDIA, AS WELL AS ARTIFICIAL AGEING TEMPERATURE AND TIME ARE THE KEY FACTORS TO DETERMINE MECHANICAL PROPERTIES.
BESIDES THESE FACTORS, NATURAL AGEING, I.E.
THE HOLDING TIME BETWEEN QUENCHING AND THE STARTING OF ARTIFICIAL TREATMENT AT AMBIENT TEMPERATURE WAS OBSERVED TO BE SIGNIFICANT AFFECT MECHANICAL PROPERTIES OF THE ALUMINIUM ALLOYS.
THE RESULTS SHOW THAT NA HAS A POSITIVE INFLUENCE ON MECHANICAL PROPERTIES OF THE RHEO-CAST 319S ALLOY. 1.
Introduction Due to excellent castability and good mechanical properties, Al-Si-Cu-Mg system alloys have been widely employed in automobile, railway and aerospace industries [1,2].

Previous Raman analysis of the SiC-layers and measured resonant frequencies and quality factors of the processed MEMS show a dependence on the Ge amount at the interface of the Si/SiC heterostructure, which allows to adjust the MEMS properties to the requirements needed for certain applications.
Thus, other factors have to be taken into account to explain the observed behavior.
The second group of factors, the defects densities, affects the quality factor in two ways.
Secondly, an improved material quality may change the elastic properties of the SiC.
The results of the rf measurements show that the properties of the MEMS structures were not only affected by a manipulation of the residual strain due to the Ge precoverage.

Results indicate that lubrication significantly affects friction factors, with oil to black graphite performing the best, yielding a friction factor of 0.15.
The heat generated due to friction might lead to undesirable material property changes and affect surface finish.
Material and Experimental Procedure Material Properties.
The experimental results indicate that the lubrication significantly affects the friction factors and dimensional changes in the ring samples.
Furthermore, it is noteworthy that Oil to Black Graphite exhibited the lowest friction factor at 0.15, suggesting its superior lubrication properties.