Preparation of L-cysteine modified MnFe2O4 nanoparticles based on high-gravity technology and application for the removal of lead

Under high gravity loads, steel double-beam floor systems need to be reinforced by beam-end concrete panels to reduce the material quantity since rotational constraints from the concrete panel can decrease the moment demand by inducing a negative moment at the ends of the beams. However, the optimal design process for the material quantity of steel beams requires a time-consuming iterative analysis for the entire floor system while especially keeping in consideration the rotational constraints in composite connections between the concrete panel and steel beams. This study aimed to develop an optimal design method with the LM (Length-Moment) index for the steel double-beam floor system to minimize material quantity without the iterative design process. The LM index is an indicator that can select a minimum cross-section of the steel beams in consideration of the flexural strength by lateral-torsional buckling. To verify the proposed design method, the material quantities between the proposed and code-based design methods were compared at various gravity loads. The proposed design method successfully optimized the material quantity of the steel double-beam floor systems without the iterative analysis by simply choosing the LM index of the steel beams that can minimize objective function while satisfying the safety-related constraint conditions. In particular, under the high gravity loads, the proposed design method was superb at providing a quantity-optimized design option. Thus, the proposed optimal design method can be an alternative for designing the steel double-beam floor system.

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High-gravity-assisted green synthesis of palladium nanoparticles: the flowering of nanomedicine

Nanomedicine Nanotechnology Biology and Medicine ◽

10.1016/j.nano.2020.102297 ◽

2020 ◽

Vol 30 ◽

pp. 102297

Author(s):

Mahsa Kiani ◽

Navid Rabiee ◽

Mojtaba Bagherzadeh ◽

Amir Mohammad Ghadiri ◽

Yousef Fatahi ◽

...

Keyword(s):

Green Synthesis ◽

Palladium Nanoparticles ◽

High Gravity

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Structural, Morphological, Magnetic and Self-Heating Studies of One-Step Polyol Synthesized Manganese Ferrite (MnFe2O4) Nanoparticles

International Journal of Nanoscience ◽

10.1142/s0219581x19500030 ◽

2019 ◽

Vol 19 (01) ◽

pp. 1950003

Author(s):

P. R. Ghutepatil ◽

S. H. Pawar

Keyword(s):

Room Temperature ◽

Synthesis Method ◽

Average Crystallite Size ◽

Superparamagnetic Nanoparticles ◽

Polyol Synthesis ◽

X Ray Diffraction ◽

Self Heating ◽

Transmission Electron ◽

One Step ◽

Mnfe2o4 Nanoparticles

In this paper, uniform and superparamagnetic nanoparticles have been prepared using one-step polyol synthesis method. Structural, morphological and magnetic properties of obtained MnFe2O4 nanoparticles have been investigated by using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM) and thermogravimetric analysis (TGA) techniques. Structural investigation showed that the average crystallite size of obtained nanoparticles was about 10[Formula: see text]nm. Magnetic study revealed that the nanoparticles were superparamagnetic at room temperature with magnetization 67[Formula: see text]emu/g at room temperature. The self-heating characteristics of synthesized MnFe2O4 nanoparticles were studied by applying external AC magnetic field of 167.6 to 335.2[Formula: see text]Oe at a fixed frequency of 265[Formula: see text]kHz. The SAR values of MnFe2O4 nanoparticles were calculated for 2, 5, 10[Formula: see text]mg[Formula: see text]mL[Formula: see text] concentrations and it is observed that the threshold hyperthermia temperature is achieved for all concentrations.

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High-gravity and high-shear gas–liquid contactors for the chemical process industry

Current Opinion in Chemical Engineering ◽

10.1016/j.coche.2011.08.005 ◽

2011 ◽

Vol 1 (1) ◽

pp. 84-88 ◽

Cited By ~ 13

Author(s):

J van der Schaaf ◽

JC Schouten

Keyword(s):

Chemical Process ◽

Process Industry ◽

High Gravity ◽

High Shear ◽

Chemical Process Industry

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