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All experiments were achieved in triplicate, and all data were analyzed for statistical significance by student pair t-test, one way ANOVA and least significant difference (LSD) post hoc testing using SPSS.
With low and high pH, dissociation of carboxylic acid decreased and the reduction of the density of the negative charge led to partial dissociation of PECs that affects the low absorbance of the PECs solution [5].
The DSC thermogram results suggest that the interaction of ionic polymers are formed the polyelectrolyte complex, at 59.7±0.3°C, and metronidazole loaded into PECs also occurs which found two peaks at 59.0±0.5°C and 162.5±0.5°C which observed the reduction of metronidazole peak in the DSC thermogram which caused from the formation of the metronidazole with the PECs.
In additional of metronidazole into PECs (Fig.5 B), all formulation observed the reduction of the percentage weight loss of metronidazole after incorporated into the PECs.

The high strength-to-weight and high stiffness-to-weight ratios of advanced composite materials offer significant weight reduction potential for these types of structures.
Fig. 1 NASA SP-8007 experimental data of axially compressed cylinder knockdown factor [2] Investigation of composite cylinder knockdown factor Knockdown factor by NASA SP-8007.
The instability response at point A is followed by a sudden reduction of axial load at point B - D that associated with shell transient collapse.
The reduction of shell axial stiffener is associated with the slope at postbuckling region.

Using standard equations the loadstroke data were converted into true stress - true strain curves.
However, with increased additions of Si (from 0.4-0.8 wt%), the alloys have exhibited reduction in strength, in particular with increase in temperature.
This reduction is likely due to the formation of Mg2Si particles.
Such reduction is primarily attributed to the formation of Mg2Si particles though its role is not clear

pH at the acid treatment step Number of leaching cycle Duration [h] Cu content in the residue [%] Total Cu extraction [%] Average Cu extraction rate [g/(L∙{TTP}8729 h)] Consumption of H2SO4 [g/kg] 1.6 1 2.5 22.3 56.8 6.3 103 2 5 8.4 81.2 2.5 0 1.2 1 2 ND 70.6 7.7 54 2 5 3.0 94.5 1.4 38 Note: * ND—No data.
The biooxidation caused an increase in the total copper recovery to 97%, i.e. 2.5% increase compared to ferric leaching and reduction of its content in the residue by two times (to 1.49%).
The maximal rates of ferric iron reduction and copper leaching were observed during the first hour of the process, and then they were sharply decreased to remain constant the rest of time.
Time [h] Flow rate, [L/h] Rate of Fe3+ reduction [g/(L∙{TTP}8729 h)] Rate of Cu2+ leaching, [g/(L∙{TTP}8729 h)] 1 2.1 32.1 25.0 2 2.1 14.7 9.9 4 1.4 11.8 6.4 8 1.4 11.5 6.2 12 1.35 11.1 5.9 16 1.3 10.5 5.5 20 1.2 9.7 5.1 Oxidation of ferrous ions by a mixed culture of microorganisms at the bioregeneration step was close to 100%, i.e.

The reduction ratio was 350.
Data analysis.
The main reason is that the decrease of the regeneration pressure leads to the reduction of the CO2 partial pressure in the gas phase, which promotes the regeneration mass transfer driving force in the gas phase.
Furthermore, high regeneration pressure leads to the reduction of the gas velocity and CO2 diffusion coefficient in the gas phase.

It can be seen that the data is in accord with conventional law.
Combined with table.3, the phenomenon is ascribed to reduction of acid strength, and it is in accordance with above mentioned.
As can be seen, the selectivity of ethylbenzene faintly decreased with reduction of conversion, and the changes of diethylbenzene and toluene content in product were contrary to that on other two zeolites.
Comparatively, the reduction of conversion was lighter over 3%La2O3-HZSM-5(Si/Al=200) with proper acid properties, reducing to 24 % from 25 % on HZSM-5.

In order to evaluate the efficiency of nodules of leguminous plants, the C2H2 reduction method were introduced in the early 1970s [3, 4] as a direct assay method.
But studies based on C2H2 reduction techniques need fresh nodules, this might broke the integrality of analysis in N cycle and the N2 fixation must reach enough strides to introduce enzymological assay [5].
In our previous study, strains isolated from nodules have a good performance on BNF with C2H2 reduction method, but the distribution of N derived from BNF on different parts of plant and the correlation of biomass and N2 fixation were still not clear.
Statistical analysis: Collected data were subjected to one-way ANOVA followed by Duncan’s test and performed using SPSS statistical software.

The horizontal bone loss of endodontically treated teeth restored with dowels does have a significant effect on their load capability, a linear relationship was observed between the level of bone loss and the amount of force reduction [3].
Then geometric data were saved as IGES format which could be exported to ABAQUS software (ABAQUS 6.10, SIMULIA, Rhode Island, USA) and afterwards the two-dimensional model of maxillary canine was finished using CAD of the software.
Another FEA study [9] observed a linear relationship between the level of bone loss and the amount of force reduction.
Thus, it is suggested that an advanced reduction of the bone support might lead to a marked increase of the fracture risk of a post-retained restoration.

.%) denoted as 1570C was produced by semi-continuous casting, homogenized at 360oC for 8 hours and then extruded at 380oC with ~75% reduction.
After ECAP, the material was finally rolled either at ambient or 300oC to a total thickness reduction of ~80%.
This observation agrees well with literature data predicting the preservation of the coherent relationship till the particle size of 116 nm [2] or 40 nm [11].
Considering preservation of fine grained microstructure as well as nano-scale dispersoids in the stir zone (Fig. 3), the material softening is believed to be mainly related with reduction of dislocation density in the rolled materials due to recrystallization during FSW [7,12].

The constitutive model of Cowper-Symonds (CS model) was applied in the paper, shown in Eq.1 (1) Where σy is the dynamic flow stress at uniaxial plastic strain rate, σ0 is the conceptual “static” flow stress inferred from experimental data, was strain rate, C and P are constants for a particular material, Ep is plastic hardening modulus, β is hardening parameters, εp, eff is effective plastic strain.
Strength reduction factor, reduction factor for modulus of elasticity and reduction factor for proportional limit were used, in the paper, to describe the mechanical properties of steel at elevated temperatures given by the Eurocode3[8].