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Electrocatalysis and sensitive determination of Sudan I at Fe3O4/graphene modified glassy carbon electrodes Suxing Luo1, a, Yuanhui Wu 1,b and Hua Gou1,c 1Department of Chemistry, Zunyi Normal College, Zunyi, Guizhou Province, 563002, China asuxingluo@126.com, bwuyuanhuil@126.com, cgouhuazy@126.com Keywords: Sudan I. iron oxide. graphene. glassy carbon electrode. electrochemistry Abstract: The iron oxide/graphene (Fe3O4/rGO) nanocomposite modified electrode and the electrochemical properties of Sudan I were investigated.
For electrochemical determination Sudan I, the modified material is a key factor, which can effect the determination sensitivity and selectivity.
Graphene often exhibits extraordinary electronic, conductive, and mechanical properties.
Recently, magnetic Fe3O4 nanoparticles have attracted many interests due to their special attributes, such as magnetic properties, optical properties, low toxicity, biocompatibility, easy preparation and high adsorption ability.
The results indicated that for 0.05 μM Sudan I, at least 200-fold of Cu2+, Mg2+, Ca2+, Na+, K+, NO2-, SO42-, and 100 times of capsanthin, capsorubin, zeaxanthin, cryptocapsin, cryptoxanthin, capsanthin diacetate; 100-fold concentration of 4-nitrophenol, 4-chlorophenol, phenol did not affect the determination of Sudan I.

Improving gypsum material properties and broadening its application fields are of great significance.
Too short and long time are not conducive to the realization of industrial production，because too short time is not convenient for operation, while long time affects productivity.
Addition of sawdust is the most important factor influencing, the second is the amount of water.
Study on Factors Influencing Properties of gypsum composite materials.New building materials .2007,5,1-3 [6] Wang Yuying,liu Minrong.
Study of the mechanical properties gypsum composites with alkali treated straw fiber.

The research work presented in this paper utilizes fracturing behaviors and failure modes to model the mechanical behaviour of FRP-strengthened RC beams.
The mechanical properties of FRP plates/sheets are relatively simple.
(a) Geometric properties and loading condition for beam specimens; (b) cross-section geometry of the specimens; (c) FE mesh for 4-point bending tests.
Notice that, in Fig.3, the results from different specimens with identical geometric and mechanical properties are averaged and the obtained mean values are considered in evaluating the accuracy of the FRP–FB-beam element.
Properties of the interfacial adhesive layer and concrete are considered to significantly influence the debonding propagation types and crack distribution.

It is also found that the high-speed rolling is beneficial for grain refinement as well as improvements in mechanical properties.
The deformation mechanism in high speed rolling, especially the role of twinning is unclear and other factors affecting texture evolution during rolling should be investigated, because the double peak texture seems to be advantageous to plastic workability and to clarify the mechanism of evolution of double peak texture may have significant industrial meanings.
The shear deformation near the sheet surface affects the evolution of rolling texture.

The forming mechanism of filter rod, equipment vibration and other interference factors all lead to fluctuations of precision of filter rod circumference which can affect the precision of the cigarette.
Tiny jitter of filter rod, the equipment vibration and other interference factors all lead to the fluctuation of filter rod circumference precision.
Its advantage is that own independent intellectual property rights and achieve popularization because of its low price.
[3] Fang Li, Li Fu and Yang Fa: Mechanical Engineer.

The dense microstructure greatly improved the mechanical strength and properties of the coating, which will be elucidated in the latter section.
The results imply that the FGC could improve the mechanical properties of the coatings.
Tensile adhesive strength was one of the important mechanical properties that can affect the ultimate success of the coating, which was greatly influenced with chemical compositions, microstructure and Yong's modulus and Hardness.
On the other hand, defect features such as voids, porosities and inter- and intra-lamellar micro-cracks tended to deteriorate the mechanical properties of the coatings.
After heat treatment, the bonding strength of both FGC and SHA increased, demonstrating that heat-treatment was a useful way to improve the mechanical properties.

However, such modifications may also affect the biocompatibility of this material, which should be accessed initially by in vitro methods.
With the objective to reverse the bone loss, diverse techniques were developed and improved, among which we can highlight the use of bone block grafts, osteogenesis growth factors and guided bone regeneration [3].
However, some disadvantages, such as poor absorption rates and low mechanical strength, have led to a great effort in order to improve HA physical and biological properties.
More recently, a biomaterial based nano-hydroxyapatite containing strontium 1% (nSrHA) was suggested as present interesting biological properties [24].
Properties of osteoconductive biomaterials: Calcium phosphates.

The information of initial corrosion damage morphology of aluminum alloy structure is of great importance, which will affect residual strength and residual life directly.
The degradation of material properties caused by the synergetic effect of cyclic stress and corrosion pits severely affects the integrity and safety of aircraft structures [1].
Fatigue property of corroded aluminum alloy with shot peening is a deserving of research.
Its mechanical properties are as follows: tensile strength is 510MPa, yield strength is 441MPa, elongation rate is 8% and Young’s modulus of elasticity is 71.7GPa.
Table1 Shot peening parameters of LC4CS aluminum alloy Factors Shot Size coverage Shot Flow [kg/min] Nozzle Distance [mm] NozzleAngle Actual Strength [A] Saturated Time[s] Air compressure Parameters S280 2.0 5.4 80 90° 0.006 9 41Psi Corrosion treatments.

Visual inspection of the surfaces in combination with sectioning of the deformed disks formed a method for studying how different factors affect a stick-slip criterion in metal forming.
The frictional conditions on the die land influence, among others, the extrusion pressure and the surface properties of the extruded profile.
In the Tresca model, the friction force is proportional to the shear strength of the material k multiplied by a friction factor m.
The top die had an average surface roughness Ra = 0.09 µm and Rz = 0.77 µm found from a mechanical roughness measurement.
Orowan, "The calculation of roll pressure in hot and cold flat rolling," Proceedings of the Institution of Mechanical Engineers, vol. 150, pp. 140-167, 1943

The mechanical properties of adhesive for Drucker-Prager model are summarized in Table 2 [15].
Validation of Failure Properties by Simulation of Single Lap Shear Test Single lap shear model.
This simulation is performed to validate the failure properties of adhesive joining.
The steel adherences are assigned an elastic-plastic behavior and the mechanical properties are summarized in Table 1.
Mechanical properties of adhesive layer for the Drucker-Prager model with plastic behavior and ductile damage model for failure behavior are summarized in Table 2 & 3 respectively.