A5037752640- Micro and Nano Robotics
- Characterization and Applications of Magnetic Nanoparticles
- Textile materials and evaluations
- Microfluidic and Bio-sensing Technologies
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Photoreceptor and optogenetics research
- Industrial Vision Systems and Defect Detection
- Neuroscience and Neural Engineering
- Mechanical Engineering and Vibrations Research
- Material Properties and Processing
- Liquid Crystal Research Advancements
- Advanced MRI Techniques and Applications
- Extracellular vesicles in disease
- Lattice Boltzmann Simulation Studies
- Planarian Biology and Electrostimulation
- NMR spectroscopy and applications
- 3D Printing in Biomedical Research
- Ergonomics and Musculoskeletal Disorders
- Metalloenzymes and iron-sulfur proteins
- Nanoparticles: synthesis and applications
- Plant tissue culture and regeneration
- Nanoparticle-Based Drug Delivery
- Modular Robots and Swarm Intelligence
- Nanocluster Synthesis and Applications
Weinberg Medical Physics (United States)
2016-2025
Azarbaijan Shahid Madani University
2023
Kharazmi University
2022
Amirkabir University of Technology
2019
Isfahan University of Technology
2016-2019
Magnetic drug targeting requires particles to move through the complex viscoelastic environments of tissues and biological fluids. However, these often inhibit particle motion, making it difficult for magnetically guided reach their intended targets. microrods are easy grow manipulate, but experience significant hindrance transport in complex, tortuous, tissue-like environments. Simple magnetic force translation ("pulling" or "pushing") is insufficient inefficient long-range such Designing...
Rotating microrods magnetized nearly orthogonally to their long axes are actuated near a solid surface, demonstrating precession akin kayaker's paddle.
Nanostructured biomaterials have great potential in the field of biomedical engineering. Efforts for treatment cardiovascular diseases focused on introducing vascular substitutes that are nonthrombogenic and long‐term patency, but still there is not any perfect replacement clinical use. In this study, nanostructure tubes a commonly known biocompatible polymer, polyethylene terephthalate (PET), were prepared via electrospinning process using small diameter mandrel as collector with two...
In vitro rooting as one of the most critical steps micropropagation is affected by various extrinsic (e.g., medium composition, auxins) and intrinsic factors species, explant). Passiflora in adventitious a difficult, complex, non-linear process. Since multivariable complex biological process, efficient reliable computational approaches such machine learning (ML) are required to model, predict, optimize this Therefore, current study, hybrid generalized regression neural network (GRNN) genetic...
Humans have been in a constant battle with tuberculosis (TB). Currently, overuse of antibiotics has resulted the spread multidrug-resistant Mycobacterium (MDR), leading to antibiotic ineffectiveness at controlling TB infection host cells and especially macrophages. Additionally, (Mtb) developed methods evade immune system survive. With discovery nanoparticle (NP)-based drugs, it is necessary research their anti-mycobacterial properties bactericidal mechanisms. In this study, we synthesized...
Soft, untethered microrobots composed of biocompatible materials for completing micromanipulation and drug delivery tasks in lab-on-a-chip medical scenarios are currently being developed. Alginate holds significant potential microrobotics due to its biocompatibility, biodegradability, encapsulation capabilities. Here, we describe the synthesis MANiACs—Magnetically Aligned Nanorods Capsules—for use as microrobotic surface tumblers, demonstrating magnetically guided lateral tumbling via...
The properties of liquid crystal-magnetic nanoparticle composites have potential for sensing in the body. We study response a (LC-MNP) composite to applied potentials hundreds volts per meter. Measuring samples using X-ray diffraction (XRD) and imaging magnetic resonance (MRI), we demonstrate that electric across centimeter scale LC-MNP can be detected XRD MRI techniques.
Different combinations of spring and dashpot systems are usually considered to model the mechanical behavior textile materials. In this work, Jeffery's model, which is a combination components, was used recovery pile carpet after static loading. The samples were exposed different levels UV radiation. short-term loading applied samples. response or thickness vs. time then measured. By analyzing using best curve fitting based on least square method, viscoelastic parameters in each exposure...
In this study, we have invented a method of delivering drugs deep into articular cartilage with shaped dynamic magnetic fields acting on small metallic nanoparticles polyethylene glycol coating and average diameter 30 nm. It was shown that transport through the entire thickness bovine can be controlled by combined alternating field at 100 Hz frequency static 0.8 tesla (T) generated 1" dia. x 2" thick permanent magnet. Magnetic samples investigated various settings time durations. Combined...
Opening the blood brain barrier (BBB) under imaging guidance may be useful for treatment of many disorders. Rapidly applied magnetic fields have potential to generate electric in tissue that, if properly timed, enable safe and effective BBB opening. By tuning pulses generated by a novel electropermanent magnet (EPM) array, we demonstrate opening tight junctions model culture vitro, show that induced monophasic electrical are more than biphasic ones. We confirmed, with vivo contrast-enhanced...
Delivery and control of untethered neuronal stimulation devices deep in the brain is currently difficult to perform with cell-level spatial resolution, but would be useful both research clinical applications. Magnetic particles can noninvasively delivered high precision structures through dynamic magnetic inversion. This article demonstrates an invertebrate animal that achieved using mechanical vibration implanted particles, which realized externally-applied field under MRI guidance....
The application of force in surgical settings is typically accomplished via physical tethers to the tool. While are common and critical, some internal procedures may benefit from a tetherless operation needles, possibly reducing number ports patient or amount tissue damage caused by tools used manipulate needles. Magnetic field gradients can dynamically apply kinetic forces magnetizable objects free such tethers, enabling ultra-minimally invasive robotic procedures. We demonstrate untethered...
To develop a micron-scale device that can operate as an MRI-based reporter for the presence of SARS-CoV-2 virus.Iron rod microdevices were constructed via template-guided synthesis and suspended in phosphate buffered saline (PBS). Heat-inactivated viruses added to samples imaged with low-field MRI.MRI showed decreased signal intensity at low concentrations recovered higher concentrations. Electron micrographs suggest reduced MRI may be due concentration-dependent shielding water protons from...
UV exposure is a major source of degradation and deterioration textile materials including carpets. Samples machine-woven cut-pile carpets were prepared exposed to different times using chamber. The short-term static loading was then applied the recovery properties thickness loss samples measured standard methods. results showed that variation in load removal steep at first obeyed an exponential trend. As time increased, it tended lower slope certain point, reached constant value. No...
Ultraviolet radiation which exists in environment around can be regarded as a major source of textile materials. In this study, the effect UV exposure on cut-pile carpet was investigated. A chamber used to expose different levels accelerated samples machine-woven pile carpet. Wear test were then carried out all using Hexapod tumbler machine. The short-term static loading applied carpets and thickness loss percent (TL) recovery (RP) at times after load removal measured standard methods....
We present an innovative combined imaging/manipulation platform to administer, drive, and concentrate nimble magnetic nanoparticles (MNPs) into a desired target in the brain. MNPs may carry useful payloads, such as agents for chemotherapy, genetic therapy, or radiation therapy. Imaging is provided by novel head-dedicated resonance imaging system that uses ultrasteep ultrafast field gradients provide not only high-resolution images but also required forces MNP manipulation. The will allow new...
While many techniques are available to manipulate deep brain structures (optogenetics, stimulation, ultrasound, transcranial magnetic stimulation) treat psychiatric and neurologic disorders, there issues that remain which decrease clinical utility. For example, DBS is invasive only able directly impact a small portion of the at time. Recent data has shown mechanical stimulation neurons depolarizes cells increasing their firing rate. Here we implanted nanorods into neural tissue live rats. We...
Viscoelastic models composing of different combination spring and dashpot are usually used to explain the mechanical behavior textile materials. In this work, a viscoelastic model was presented analyze effect traffic exposure on compression recovery performance pile carpet. Wear test, performed by Hexapod tumbling machine, conducted simulate exposure. Using tensile tester, adjusted in mode, one cycle compression–decompression applied samples. The standard nonlinear fit experimental data....