12 research outputs found
Development of lower limb rehabilitation evaluation system based on virtual reality technology
Nowadays, with the development of the proportion of the elderly population in the world, several problems caused by the population aging gradually into people's horizons. One of the biggest problems plagued the vast majority of the elderly is hemiplegia, which leads to the vigorous development of the physical therapists. However, these traditional methods of physical therapy mainly rely on the skill of the physical therapists. In order to make up the defects of traditional methods, many research groups have developed different kinds of robots for lower limb rehabilitation training but most of them can only realize passive training which cannot adopt rehabilitation training based on the patients' individual condition effectively and they do not have a rehabilitation evaluation system to assess the real time training condition of the hemiplegic patients effectively. In order to solve the problems above, this paper proposed a lower limb rehabilitation evaluation system which is based on the virtual reality technology. This system has an easy observation of the human-computer interaction interface and the doctor is able to adjust the rehabilitation training direct at different patients in different rehabilitation stage based on this lower limb rehabilitation evaluation system. Compared with current techniques, this novel lower limb rehabilitation evaluation system is expected to have significant impacts in medical rehabilitation robot field
DataSheet1_Design and synthesis of ERĪ± agonists: Effectively reduce lipid accumulation.docx
In recent years, the incidence of non-alcoholic fatty liver disease (NAFLD) has been increasing worldwide. Hepatic lipid deposition is a major feature of NAFLD, and insulin resistance is one of the most important causes of lipid deposition. Insulin resistance results in the disruption of lipid metabolism homeostasis characterized by increased lipogenesis and decreased lipolysis. Estrogen receptor Ī± (ERĪ±) has been widely reported to be closely related to lipid metabolism. Activating ERa may be a promising strategy to improve lipid metabolism. Here, we used computer-aided drug design technology to discover a highly active compound, YRL-03, which can effectively reduce lipid accumulation. Cellular experimental results showed that YRL-03 could effectively reduce lipid accumulation by targeting ERĪ±, thereby achieving alleviation of insulin resistance. We believe this study provides meaningful guidance for future molecular development of drugs to prevent and treat NAFLD.</p
Acenaphthoimidazolylidene Gold Complex-Catalyzed Alkylsulfonylation of Boronic Acids by Potassium Metabisulfite and Alkyl Halides: A Direct and Robust Protocol To Access Sulfones
A robust
acenaphthoimidazolylidene gold complex is demonstrated
as a highly efficient catalyst in the direct alkylsulfonylation of
boronic acids. Remarkably, a wide range of highly reactive and unreactive
C-electrophiles were well-tolerated to produce various (hetero)Āaryl-alkyl,
aryl-alkenyl, and alkenyl-alkyl sulfones in satisfactory yields with
5 molāÆ% catalyst loading. Along with the steric properties
of NHC ligands, the high catalytic activity of this gold complex suggests
that the strong Ļ-donation of acenaphthoimidazolylidene also
played a role in promoting this challenging redox-neutral catalytic
process
Side-to-Side Cold Welding for Controllable Nanogap Formation from āDumbbellā Ultrathin Gold Nanorods
Cold
welding has been regarded as a promising bottom-up nanofabrication
technique because of its ability to join metallic nanostructures at
room temperature with low applied stress and without introducing damage.
Usually, the cold welding process can be done instantaneously for
ultrathin nanowires (diameter <10 nm) in āhead-to-headā
joining. Here, we demonstrate that ādumbbellā shaped
ultrathin gold nanorods can be cold welded in the āside-to-sideā
mode in a highly controllable manner and can form an extremely small
nanogap via a relatively slow welding process (up to tens of minutes,
allowing various functional applications). By combining in situ high-resolution
transmission electron microscopic analysis and molecular dynamic simulations,
we further reveal the underlying mechanism for this āside-to-sideā
welding process as being dominated by atom kinetics instead of thermodynamics,
which provides critical insights into three-dimensional nanosystem
integration as well as the building of functional nanodevices
Mitochondria-Targeting Nanoplatform with Fluorescent Carbon Dots for Long Time Imaging and Magnetic Field-Enhanced Cellular Uptake
In this study, a biocompatible nanoplatform
has been constructed on the basis of magnetic mesoporous silica nanoparticles
(Fe<sub>3</sub>O<sub>4</sub>@mSiO<sub>2</sub>) via surface modification
of triphenylphospine (TPP) and then conjugation with fluorescent carbon
dots (CDs). The as-prepared Fe<sub>3</sub>O<sub>4</sub>@mSiO<sub>2</sub>āTPP/CDs nanoplatform shows a very low cytotoxicity and apoptosis
rate in various cell lines such as A549, CHO, HeLa, SH-SY5Y, HFF,
and HMEC-1. More importantly, this nanoplatform integrates long time
cell imaging, mitochondria-targeting, and magnetic field-enhanced
cellular uptake functionalities into an all-in-one system. Time-dependent
mitochondrial colocalization in all of the cell lines has been proved
by using confocal laser scanning microscopy and flow cytometry, while
the multicolored fluorescence of the Fe<sub>3</sub>O<sub>4</sub>@mSiO<sub>2</sub>āTPP/CDs could remain bright and stable after coincubation
for 24 h. In addition, the cellular uptake efficiency could be enhanced
in a short time as a static magnetic field of 0.30 T was applied to
the coincubation system of A549 and HFF cell lines. This bionanoplatform
may have potential applications in targeted drug delivery for mitochondria
diseases as well as early cancer diagnosis and treatment
Comparison of Two Approaches for the Attachment of a Drug to Gold Nanoparticles and Their Anticancer Activities
Drug
attachment is important in drug delivery for cancer chemotherapy.
The elucidation of the release mechanism and biological behavior of
a drug is essential for the design of delivery systems. Here, we used
a hydrazone bond or an amide bond to attach an anticancer drug, doxorubicin
(Dox), to gold nanoparticles (GNPs) and compared the effects of the
chemical bond on the anticancer activities of the resulting Dox-GNPs.
The drug release efficiency, cytotoxicity, subcellular distribution,
and cell apoptosis of hydrazone-linked HDox-GNPs and amide-linked
SDox-GNPs were evaluated in several cancer cells. HDox-GNPs exhibited
greater potency for drug delivery via triggered release comediated
by acidic pH and glutathione (GSH) than SDox-GNPs triggered by GSH
alone. Dox released from HDox-GNPs was released in lysosomes and exerted
its drug activity by entering the nuclei. Dox from SDox-GNPs was mainly
localized in lysosomes, significantly reducing its efficacy against
cancer cells. In addition, <i>in vivo</i> studies in tumor-bearing
mice demonstrated that HDox-GNPs and SDox-GNPs both accumulate in
tumor tissue. However, only HDox-GNPs enhanced inhibition of subcutaneous
tumor growth. This study demonstrates that HDox-GNPs display significant
advantages in drug release and antitumor efficacy
Development of a rehabilitation robot for hand and wrist rehabilitation training
Up to now, the number of hemiplegia rehabilitation devices is increasing quickly along with hemiplegic patients'. But most of hand rehabilitation training just limit to the fingers flexible training of patients' affected hand. They not only ignore the importance of functional training of hand, but also wrist cooperative training during rehabilitation process. In our new research, we proposed a novel hand and wrist rehabilitation robot to achieve grasp functional training of hand except thumb and intorsion/extorsion and dorsiflexion/plantar flexion of wrist, which provides a creative hand rehabilitation way for hemiplegic patients. In this paper, we will introduce the detail design of the robot. It mainly includes two rehabilitation units - wrist rehabilitation unit and hand rehabilitation unit, which can realize separate motion or cooperate motion of hand and wrist based on patients' willingness. What's more, the torque sensor unit is purposely designed to detect feedback torque of related motion instead of available ones in the market, which makes the whole mechanical structure more compact. In a word, this novel hand and wrist rehabilitation robot will have a promising prospect
Development an arm robot to simulate the lead-pipe rigidity for medical education
Neurologic examination takes an important role in the physical examination. It requires abundant knowledge with prominent skills. Normally, the medical staffs, especially novices are trained to master the skills and accumulate experiences with several methods such as watching video, training with the simulated patient (SP), and so on. However, the drawbacks of the above methods, such as lack of multi-symptoms, lack of active interactions, etc, limit the training effects. To make up them, several kinds of medical training simulators have been developed to improve training effectiveness. However, most of these simulators just focus on mimicking the symptoms. The could not simulate the pathology of diseases. In this paper, we will propose an elbow robot named WKE-2(Waseda Kyotokagaku Elbow Robot No.2) to simulate the symptoms of motor nerve system for neurologic examination training on elbow force examination. In this paper, the mechanism of the elbow robot and physiological neurological model is described. As a sample, the performance of lead-pipe symptoms is introduced. Taking advantage of the robot, the trainee can get a full training on the examination skills and knowledge as well as the understanding of disease effection. Finally, several experiments are performed to verify the proposed robot. The results lead to the consideration that the approach is worth following in further research.
Development of an arm robot with human-like motor nerve model for neurological examination training
Development of an arm robot with human-like motor nerve model for neurological examination trainin
Visible-Light-Induced Phenoxyl Radical-based MetalāOrganic Framework for Selective Photooxidation of Sulfides
Phenoxyl radicals originating from phenols through oxidation
or
photoinduction are relatively stable and exhibit mild oxidative activity,
which endows them with the potential for photocatalysis. Herein, a
stable and recyclable metalāorganic framework Zr-MOF-OH constructed of a binaphthol derivative ligand has been synthesized
and functions as an efficient heterogeneous photocatalyst. Zr-MOF-OH shows fairly good catalytic activity and substrate compatibility
toward the selective oxidation of sulfides to sulfoxides under visible
light irradiation. Such irradiation of Zr-MOF-OH converts
the phenolic hydroxyl groups of the binaphthol derivative ligand to
phenoxyl radicals through excited state intramolecular proton transfer,
and the excited state photocatalyst triggers the single-electron oxidation
of the sulfide. No reactive oxygen species are produced in the photocatalytic
process, and triplet O2 directly participates in the reaction,
endowing Zr-MOF-OH with wide substrate compatibility
and high selectivity, which also proposes a promising pathway for
the direct activation of substrates via phenoxyl radicals