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Online since: August 2013
Authors: Xiao Yan Song, Yuan Yuan Li, Qiang Hua Ji
Introduction
Energy conservation, emission reduction, environmental protection and sustainable development are hot issues of common concern of all countries in the world.
As seen from the data in Table 2, there are no changes in PG grade before and after adding warm-mix agent to SBS modified asphalt, so that warm-mix agent has little influence on PG grade.
Table 5 Rutting test data of SBS modified asphalt mixture Mixture type Average dynamic stability (time/mm) AC-13 SBS modified asphalt HMA 4183 WMA 5006 As seen from Table 5, the dynamic stability of the warm-mix SBS modified asphalt mixture is higher than that of the ordinary hot-mix SBS modified asphalt mixture
Table 6 Data of beam bending failure test of SBS modified asphalt mixture Mixture type Anti-flexural-tensile strength (MPa) Flexural-tensile strain (με) Flexural-tensile stiffness modulus (MPa) AC-13 SBS modified asphalt HMA 8.6 2524 3407 WMA 10.3 2544 4048 As seen from Table 6, the destruction flexural-tensile strain of the warm-mix SBS modified asphalt mixture is equivalent to the corresponding hot-mix asphalt mixture.
Table 7 Data of water stability test of SBS modified asphalt mixture Mixture type Residual stability ratio (%) Residual strength ratio (%) AC-13 SBS modified asphalt HMA 92.5 93.2 WMA 93.3 95.6 The analysis of the data in above table shows: the residual stability ratio and freeze-thaw splitting strength ratio of the warm-mix SBS modified asphalt mixture can meet the specification requirements.
As seen from the data in Table 2, there are no changes in PG grade before and after adding warm-mix agent to SBS modified asphalt, so that warm-mix agent has little influence on PG grade.
Table 5 Rutting test data of SBS modified asphalt mixture Mixture type Average dynamic stability (time/mm) AC-13 SBS modified asphalt HMA 4183 WMA 5006 As seen from Table 5, the dynamic stability of the warm-mix SBS modified asphalt mixture is higher than that of the ordinary hot-mix SBS modified asphalt mixture
Table 6 Data of beam bending failure test of SBS modified asphalt mixture Mixture type Anti-flexural-tensile strength (MPa) Flexural-tensile strain (με) Flexural-tensile stiffness modulus (MPa) AC-13 SBS modified asphalt HMA 8.6 2524 3407 WMA 10.3 2544 4048 As seen from Table 6, the destruction flexural-tensile strain of the warm-mix SBS modified asphalt mixture is equivalent to the corresponding hot-mix asphalt mixture.
Table 7 Data of water stability test of SBS modified asphalt mixture Mixture type Residual stability ratio (%) Residual strength ratio (%) AC-13 SBS modified asphalt HMA 92.5 93.2 WMA 93.3 95.6 The analysis of the data in above table shows: the residual stability ratio and freeze-thaw splitting strength ratio of the warm-mix SBS modified asphalt mixture can meet the specification requirements.
Online since: December 2012
Authors: Rameshwar Rao, K. Venkateswara Rao, C. Shilpa Chakra
The reduction of pure Ag+ ions has been monitored by measuring the UV-Vis spectrum of the reaction products at 5 hours after diluting a small aliquot of the sample with distilled water.
As the Carica papaya fruit extract has been mixed with the aqueous solution of the silver ion complex, it changed its color from watery to yellowish brown due to reduction of silver ion indicating formation of silver nano-particles.
Conclusions In conclusion, it can be stated that bio-reduction of aqueous Ag+ ions by the fruit extract of the Carica papaya plant has been demonstrated in a novel and eco-friendly green synthesis process.
The reduction of the metal ions using fruit extracts has led to the formation of silver nano-particles of fairly well-defined dimensions.
The average crystallite size of the silver particles calculated from XRD (35nm) is in the same order with particle size histogram data.
As the Carica papaya fruit extract has been mixed with the aqueous solution of the silver ion complex, it changed its color from watery to yellowish brown due to reduction of silver ion indicating formation of silver nano-particles.
Conclusions In conclusion, it can be stated that bio-reduction of aqueous Ag+ ions by the fruit extract of the Carica papaya plant has been demonstrated in a novel and eco-friendly green synthesis process.
The reduction of the metal ions using fruit extracts has led to the formation of silver nano-particles of fairly well-defined dimensions.
The average crystallite size of the silver particles calculated from XRD (35nm) is in the same order with particle size histogram data.
Online since: February 2014
Authors: Hai Fan, Ling Li, Xu Yun, Xiao Kun Liu, Jie Zhang, Bao Shan Wang
Excessive salt lowers the soil water potential and thus the reduction of stomata aperture, which limits CO2 supply for photosynthesis. (2) Ion stress.
And for each index, at least 5 data were collected.
Based on the theory of Farquhar [6], the reduction of photosynthesis under 200mM NaCl may be due to stomatal limitation factor, but the reduction under 400 mM NaCl may be due to non-stomatal limitation factor, because the decline of Gs was paralleled with the increase of Ci.
In this paper, though the reduction of Pn was accompanied by the reduction of Gs under both 200 and 400 mM NaCl.
Under NaCl stress, the CO2 utilization ability is often impaired, which is reflected by the reduction of Pn, and reflected by the increase in CO2 compensation point and CO2 saturation point, especially in C3 plants.
And for each index, at least 5 data were collected.
Based on the theory of Farquhar [6], the reduction of photosynthesis under 200mM NaCl may be due to stomatal limitation factor, but the reduction under 400 mM NaCl may be due to non-stomatal limitation factor, because the decline of Gs was paralleled with the increase of Ci.
In this paper, though the reduction of Pn was accompanied by the reduction of Gs under both 200 and 400 mM NaCl.
Under NaCl stress, the CO2 utilization ability is often impaired, which is reflected by the reduction of Pn, and reflected by the increase in CO2 compensation point and CO2 saturation point, especially in C3 plants.
Online since: November 2023
Authors: Daniele Mirabile Gattia, Maria Richetta, Giuseppe Barbieri, Antonino Coglitore, Fabio De Pascalis, Michele Nacucci, Fania Palano, Angelo Tatì, Ugo De Angelis, Alessandra Palombi
Table 1 summarize obtained data.
Similar results were obtained by Al-Bermani and colleagues [9] who also correlated the reduction of the mechanical properties of the treated samples with the size increase of the α phase lamellae.
In this load condition, the resulting safety factor was high enough to operate a mass reduction: lattice structures, modelled by the software Netfabb, replaced the massive part of the component.
The two different geometries, Softbox and Hexagon allow a mass reduction of 32% and 27%, respectively.
The same simulations performed on the modified parts showed a reduction of the safety factor below allowable values, the method proposed should be supported by new simulations on parts with different degrees of mass reduction.
Similar results were obtained by Al-Bermani and colleagues [9] who also correlated the reduction of the mechanical properties of the treated samples with the size increase of the α phase lamellae.
In this load condition, the resulting safety factor was high enough to operate a mass reduction: lattice structures, modelled by the software Netfabb, replaced the massive part of the component.
The two different geometries, Softbox and Hexagon allow a mass reduction of 32% and 27%, respectively.
The same simulations performed on the modified parts showed a reduction of the safety factor below allowable values, the method proposed should be supported by new simulations on parts with different degrees of mass reduction.
Online since: August 2008
Authors: Sumaeth Chavadej, O. Huayyai, R. Rujiravanit, M. Abe
The experimental data taken after the steady state conditions
were averaged for assesing the process performance.
The cycle time of 2 d/cycle gave the highest surface tension reduction of 59%.
The higher the reduction of surface tension, the higher the biosurfactant concentration.
The biosurfactant produced from this strain showed a lower surface tension than other strains that were reported such as the biosurfactant produced from Pseudomonas aeruginosa 47T2 by using olive oil and sunflower oil as carbon sources which gave the lowest surface tension of 34 and 37 mN/m, respectively [9]. 0 5 10 15 20 25 30 35 1 2 3 Cycle time (d/cycle) Surface tension (mN/m) 54 55 56 57 58 59 60 Surface tension reduction (%) Surface tension Surface tension reduction Microbial Concentration The effluent suspended solid (SS) was measured in the decant step which indicates the cell wash out.
Surface tension and surface tension reduction at different cycle times when the SBR system was operated at an oil loading rate of 2 kg/m3d under steady state conditions.
The cycle time of 2 d/cycle gave the highest surface tension reduction of 59%.
The higher the reduction of surface tension, the higher the biosurfactant concentration.
The biosurfactant produced from this strain showed a lower surface tension than other strains that were reported such as the biosurfactant produced from Pseudomonas aeruginosa 47T2 by using olive oil and sunflower oil as carbon sources which gave the lowest surface tension of 34 and 37 mN/m, respectively [9]. 0 5 10 15 20 25 30 35 1 2 3 Cycle time (d/cycle) Surface tension (mN/m) 54 55 56 57 58 59 60 Surface tension reduction (%) Surface tension Surface tension reduction Microbial Concentration The effluent suspended solid (SS) was measured in the decant step which indicates the cell wash out.
Surface tension and surface tension reduction at different cycle times when the SBR system was operated at an oil loading rate of 2 kg/m3d under steady state conditions.
Online since: June 2011
Authors: A.K. Arof, Z.A. Ibrahim, S.A. Mohamad, Wan Jefrey Basirun, Mehdi Ebadi
To avoid the oxygen reduction reaction, the electrolyte solutions were purged free from dissolved O2 with pure nitrogen gas for 30 minutes before each experiment.
On the anodic scan, the oxidation peak of the reduction of zinc to Zn2+ can be clearly seen at -0.5 V.
We assign this wave at - 0.5 V in Fig. 3 to Eq. 2, which is followed by the reduction of Zn2+ at more negative potentials to give ZnSe deposits.
Zn2+ (aq) + Se (s) + 2e- → ZnSe (s) (4) In summary, the reduction of H2SeO3 to Se which further catalyzes the reduction of Zn2+ ions can be represented by the equation: Zn2+ (aq) + SeO32- (aq) + 6H+ (aq) + 6e- → ZnSe (s) + 3H2O (aq) (5) To prepare good quality thin films of ZnSe on ITO conducting glass, considering the preliminary results mentioned above, electrodeposition were done at three different potential at 65oC.
Similar result was reported by [7, 8] and also conforms to the JCPDS data [6].
On the anodic scan, the oxidation peak of the reduction of zinc to Zn2+ can be clearly seen at -0.5 V.
We assign this wave at - 0.5 V in Fig. 3 to Eq. 2, which is followed by the reduction of Zn2+ at more negative potentials to give ZnSe deposits.
Zn2+ (aq) + Se (s) + 2e- → ZnSe (s) (4) In summary, the reduction of H2SeO3 to Se which further catalyzes the reduction of Zn2+ ions can be represented by the equation: Zn2+ (aq) + SeO32- (aq) + 6H+ (aq) + 6e- → ZnSe (s) + 3H2O (aq) (5) To prepare good quality thin films of ZnSe on ITO conducting glass, considering the preliminary results mentioned above, electrodeposition were done at three different potential at 65oC.
Similar result was reported by [7, 8] and also conforms to the JCPDS data [6].
Online since: July 2014
Authors: S. Joseph Sekhar, V. Christus Jeya Singh, K. Thyagarajan, P.C. Murugan
A data logger is provided to record the temperature.
Sufficient quantity of charcoal is filled over the grate so as to occupy the entire reduction zone.
Variation of HHV with ф for the biomasses Wood and Rubber Seed Kernel A reduction in HHV of gas has been observed with the increase in ф.
In both biomasses drastic reduction in efficiency is observed when the equivalence ratio is increased from 0.2 to 0.3.
Sheth: Modeling and Simulation of Reduction Zone of Downdraft Biomass Gasifier: Effect of Char Reactivity Factor.
Sufficient quantity of charcoal is filled over the grate so as to occupy the entire reduction zone.
Variation of HHV with ф for the biomasses Wood and Rubber Seed Kernel A reduction in HHV of gas has been observed with the increase in ф.
In both biomasses drastic reduction in efficiency is observed when the equivalence ratio is increased from 0.2 to 0.3.
Sheth: Modeling and Simulation of Reduction Zone of Downdraft Biomass Gasifier: Effect of Char Reactivity Factor.
Online since: February 2018
Authors: Skaidrite Reihmane, Aina Bernava
Retting with use of enzymes allows a more controlled degradation of fibres and a reduction of effluents [3].
The reduction of costs for production of fibres for technological applications, an improvement of its properties, and use of novel products is very important.
Reduction of mechanical properties is observed in all cases of treatment, and it obviously is caused by avoiding impurities of cellulose fibres, mainly lignin.
Good correlation is observed between the relative values of tensile strength (Table 1) and microscopy data of investigated hemp and flax fibres.
Study of microscopy data of examined hemp and flax fibres shows that the effectiveness of both enzymes for separation of fibres from bundles (cottonization).
The reduction of costs for production of fibres for technological applications, an improvement of its properties, and use of novel products is very important.
Reduction of mechanical properties is observed in all cases of treatment, and it obviously is caused by avoiding impurities of cellulose fibres, mainly lignin.
Good correlation is observed between the relative values of tensile strength (Table 1) and microscopy data of investigated hemp and flax fibres.
Study of microscopy data of examined hemp and flax fibres shows that the effectiveness of both enzymes for separation of fibres from bundles (cottonization).
Online since: September 2011
Authors: Guo Ying Zeng, Deng Feng Zhao, Hang Rui Yan, Mei Zi Tian
The two shells are replaced by finite element of fourth order reduction model.
The upper and lower shells are simplified to finite element of fourth order reduction model.
Upper and lower shells are simplified as finite element of fourth order reduction models.
Experiments are performed by the Labview-based data generation and collection system.
Data are collected by accelerometers in a 1s window that cover 10,000 sampling points in total.
The upper and lower shells are simplified to finite element of fourth order reduction model.
Upper and lower shells are simplified as finite element of fourth order reduction models.
Experiments are performed by the Labview-based data generation and collection system.
Data are collected by accelerometers in a 1s window that cover 10,000 sampling points in total.
Online since: May 2012
Authors: Can Zhang, Yun Wang, Jin Chuan Zhang
For a given engine SFC, the reduction of thrust requirements essentially results in lower fuel consumption.
However, at a fixed specific thrust and engine thrust, an increase in T4 can result in a smaller core and, therefore, a higher engine bypass ratio; in some cases, a potential reduction in engine weight can more than compensate for a non-optimal thermal efficiency.
Fig 6 is its main parametric data.
Fig. 6 Main parametric data Through the calculation of a conventional and the intercooled V2533, also the design and analysis of intercooled aero engines system.
For the primary relatively short mission estimation here, this effect will increase the saving to 2.4%, whereas for the aircraft design range mission, this will correspond to a reduction in fuel burn up to 4.0%.
However, at a fixed specific thrust and engine thrust, an increase in T4 can result in a smaller core and, therefore, a higher engine bypass ratio; in some cases, a potential reduction in engine weight can more than compensate for a non-optimal thermal efficiency.
Fig 6 is its main parametric data.
Fig. 6 Main parametric data Through the calculation of a conventional and the intercooled V2533, also the design and analysis of intercooled aero engines system.
For the primary relatively short mission estimation here, this effect will increase the saving to 2.4%, whereas for the aircraft design range mission, this will correspond to a reduction in fuel burn up to 4.0%.