Closure to “Observed Performance of Long Steel H-piles Jacked into Sandy Soils” by J. Yang, L. G. Tham, P. K. K. Lee and F. Yu

Yang, Jun; Tham, L.G.; Lee, P. K.; Yu, Feng

doi:10.1061/(asce)1090-0241(2007)133:7(900.2)

Cited by 35 publications

(47 citation statements)

References 4 publications

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“…The dependence of M s on Fe 3 O 4 content is shown in Figure 8, displaying almost linear increase of the M s on the Fe 3 O 4 content in the sphere by a manner of M s /(emu) = −4.6 + 80.7 w Fe3O4 . It is interesting to deduce that the M s of pure Fe 3 O 4 nanoparticles was 76.1 emu/g, which is at the same level as those reported in literatures 10–17. On the other side, the M s of pure CS could be obtained by extending the line to zero Fe 3 O 4 content to be −4.6 emu/g, suggesting diamagnetic contribution of the CS that was binding with Fe 3 O 4 nanoparticles13 in the spheres.…”

Section: Resultssupporting

confidence: 85%

“…At the same time, the ‐NH deformation vibration of the amine groups at 1420 cm −1 for pure CS almost disappears, and the band around 3420 cm −1 for hydrogen‐bonded OH and N H stretching vibrations shift to lower frequencies of below 3400 cm −1 . Those results indicate strong interactions between CS and nano sized Fe 3 O 4 particles,11, 14, 15, 22 which benefits the stabilization of the nano Fe 3 O 4 particles by the neighboring CS molecules and prevents them from aggregating. Kim and coworkers15 suggest that the potential sites of CS to bind with nano sized Fe 3 O 4 particles could be the free amine group and the carbonyl oxygen ( N CO).…”

Section: Resultsmentioning

confidence: 93%

“…The acidic mixture solution of iron and CS was added dropwise into alkali ammonia solution, so that the CS and the Fe ions could be precipitated accordingly. It has been suggested5–17 that the Fe ions in the drop were transformed into Fe 3 O 4 , so its content in the final magnetic sphere could be determined experimentally by TGA measurements. The thermograms of the spheres are shown in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

“…Nano sized hollow particles have also been obtained by self‐assembly of chitosan (CS) and Fe 3 O 4 particles 8, 9. Moreover, it has been reported that functional groups at the surface of Fe 3 O 4 particles could react with those of CS or its derivatives, so that Fe 3 O 4 particles were stabilized by layer of polymer coating to obtain nano or micron particles 10–17. The preparations of such composite materials usually include two steps 5–17.…”

Section: Introductionmentioning

confidence: 99%

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Facile one‐pot preparation of superparamagnetic chitosan sphere and its derived hollow sphere

Zou

Geng

Lin

et al. 2011

J of Applied Polymer Sci

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A facile and robust approach is presented to prepare superparamagnetic chitosan (CS) spheres by simply dropping iron ions and CS mixture solution to ammonia aqueous solution. Fourier transform infrared spectra, X-ray diffractions, and thermogravimetric analyses of the obtained spheres indicate that the composite spheres consisted of CS and Fe3O4. The microstructures of the surface and the inner part of the sphere were observed by scanning electron microscope to indicate nano scale of the Fe3O4 component. The results suggest that the nano sized Fe3O4 particles can be stabilized by CS molecules in the matrix of sphere to avoid aggregation based on their binding interaction. Because of the nano scale distributed Fe3O4 particles, the composite spheres show superparamagnetic properties, and the saturation magnetization of the composite sphere increases linearly with the Fe3O4 content. An electron probe microanalyzer was employed to measure the energy dispersive spectra of the magnetic sphere, through which the element contents at different points along the radius of a magnetic CS sphere have been obtained. It has been found that the Fe3O4 content decreased gradually from outer surface to its inner core. Moreover, the composite sphere was calcined in air at 700 degrees C to prepare spherical hollow sphere. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 123: 3587-3594, 2012National Basic Research Program of China (973 Program) [2010CB732203]; Fundamental Research Funds for the Central Universities [2010121055]; Scientific and Technological Innovation Platform of Fujian Province of China [2009J1009

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Facile one‐pot preparation of superparamagnetic chitosan sphere and its derived hollow sphere

Zou

Geng

Lin

et al. 2011

J of Applied Polymer Sci

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“…Then, the temperature of the mixture was increased to 80°C for 30 min and HCl was added dropwise to adjust pH to 6–7. After reacting for 30 min, the resulting Fe 3 O 4 @ SiO 2 nanoparticles were rinsed with deionized water four times prior to further usage 18, 19.…”

Section: Methodsmentioning

confidence: 99%

Fe³⁺‐immobilized nanoparticle‐modified capillary for capillary electrophoretic separation of phosphoproteins and non‐phosphoproteins

Zhang

et al. 2011

Electrophoresis

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A fused-silica capillary modified with Fe³⁺-immobilized magnetic nanoparticles (Fe³⁺-IMAN) has been investigated for the capillary electrophoretic (CE) separation of phosphoproteins and non-phosphoproteins. The Fe³⁺-IMAN capillary was achieved by covalently immobilising epoxy-based magnetic silica nanoparticles (160 nm) on the prederivatized 3-aminopropyl-trimethoxysilane (APTMS) fused-silica capillary (75 μm id), followed by disodium iminodiacetate and Fe³⁺. The buildup process was examined by measuring the streaming potentials of the bare capillary, APTMS capillary, epoxy-based nanoparticle capillary and Fe³⁺-IMAN capillary by varying the buffer pH. An inverted fluorescence microscope was used to determine the surface features of the Fe³⁺-IMAN capillary derivatized with morin. Further experimental results confirmed that Fe³⁺-IMAN bonded on the inner wall of the APTMS capillary could provide sufficient solute-bonded phase interactions to allow for the CE separation of phosphoproteins and non-phosphoproteins at concentration levels down to 50 μg/mL. The highest number of theoretical plates obtained was about 233,000/m, and the relative standard deviation (RSD) for migration times was <2.57% for eight consecutive runs, respectively. Additionally, the Fe³⁺-IMAN modifing method was also applied to the analyses of bovine milk proteins. With simplicity, high resolving power, and high repeatability, the proposed method has shown great potential for phosphoproteomics applications.

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Mechanical and Fatigue Behavior of Ca₆₅Mg₁₅Zn₂₀ Bulk‐Metallic Glass

et al. 2009

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A number of BMGs, such as Zr-, Fe-, Pd-, Al-, and Ni-based alloys, have been discovered after the rapid development of glass-forming alloys during the early 1990s. [1][2][3][4] Ca-Mg-Cu and Ca-Mg-Cu-Ag BMGs were successfully fabricated by Amiya and Inoue in 2002. [5,6] Following these reports, numerous Ca-based BMG systems have been produced and studied. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Ca-based BMG alloys are of interest because of their unique properties, such as low density ($2.0 g cc À1 ), low Young's modulus ($17-20 GPa) that is comparable to the modulus of human bones, low glass-transition temperature (T g $ 100 8C) and a wide super-cooled liquid temperature range (DT xg ¼ T x À T g % 30-80 8C). [15,18] Elements such as Ca, Mg, and Zn are biocompatible, which makes the Ca-Mg-Zn-based alloys attractive for use in biomedical applications. [18] The amorphous structure gives unique properties to BMGs, including high elastic strain, high fracture strength, and high fatigue resistance. Although the mechanical behavior of BMGs is studied widely, [1][2][3][4]22,23] there is no fatigue data for Ca-based BMGs. A comprehensive understanding based on the compression, hardness, and fatigue behavior is critically important for the application of the Ca-based BMGs. In the current paper, the compression behavior, Vickers hardness, and fatigue characteristics of Ca 65 Mg 15 Zn 20 BMGs were investigated at room temperature in air. A mechanistic understanding of the fatigue and fracture mechanisms of Ca-based BMGs is proposed. ExperimentalThe Ca 65 Mg 15 Zn 20 (atomic percent, at%) BMG alloy was fabricated by induction melting pure elements (99.9 wt%) with a water-cooled copper crucible in an argon atmosphere. The prepared alloy was subsequently placed in a quartz crucible with a 2 mm diameter hole at the bottom, induction melted in an argon atmosphere, and injected into a watercooled copper mold with a 15 Â 15 Â 4 mm 3 cavity. Previous studies demonstrated that the critical thickness of this alloy, below which it is fully amorphous, is 6 mm [9,15,18] . X-ray diffraction and differential scanning calorimetry (DSC) analyses indeed confirmed the fully amorphous state of the produced 4-mm-thick plates. Thermal properties of the cast alloys were determined using a DSC Q1000 differential-scanning calorimeter (TA Instruments Inc., New Castle, DE) at a heating rate of 20 K min À1 . The weight of the DSC samples was in the range of 8-15 mg. The DSC results exhibited that this Ca 65 Mg 15 Zn 20 BMG had a very low

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Closure to “Observed Performance of Long Steel H-piles Jacked into Sandy Soils” by J. Yang, L. G. Tham, P. K. K. Lee and F. Yu

Cited by 35 publications

References 4 publications

Facile one‐pot preparation of superparamagnetic chitosan sphere and its derived hollow sphere

Facile one‐pot preparation of superparamagnetic chitosan sphere and its derived hollow sphere

Fe³⁺‐immobilized nanoparticle‐modified capillary for capillary electrophoretic separation of phosphoproteins and non‐phosphoproteins

Mechanical and Fatigue Behavior of Ca₆₅Mg₁₅Zn₂₀ Bulk‐Metallic Glass

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Closure to “Observed Performance of Long Steel H-piles Jacked into Sandy Soils” by J. Yang, L. G. Tham, P. K. K. Lee and F. Yu

Cited by 35 publications

References 4 publications

Facile one‐pot preparation of superparamagnetic chitosan sphere and its derived hollow sphere

Facile one‐pot preparation of superparamagnetic chitosan sphere and its derived hollow sphere

Fe3+‐immobilized nanoparticle‐modified capillary for capillary electrophoretic separation of phosphoproteins and non‐phosphoproteins

Mechanical and Fatigue Behavior of Ca65Mg15Zn20 Bulk‐Metallic Glass

Contact Info

Product

Resources

About

Fe³⁺‐immobilized nanoparticle‐modified capillary for capillary electrophoretic separation of phosphoproteins and non‐phosphoproteins

Mechanical and Fatigue Behavior of Ca₆₅Mg₁₅Zn₂₀ Bulk‐Metallic Glass