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PubMed Journals Articles About "Hybrid Camphor Camphene Material Studies Self Propelled Motion" RSS

15:21 EST 7th December 2019 | BioPortfolio

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Showing "hybrid camphor camphene material studies self propelled motion" PubMed Articles 1–25 of 30,000+

A hybrid camphor-camphene wax material for studies on self-propelled motion.

A new material that combines the self-propelling properties of camphor with the malleability of camphene is reported. It has wax-like mechanical properties at room temperature and can be formed into required shapes. The speed of the self-propelled objects and the trajectory depend on the shape and camphor-camphene weight ratio.


Reactive Inkjet Printing and Propulsion Analysis of Silk-based Self-propelled Micro-stirrers.

In this study, a protocol for using reactive inkjet printing to fabricate enzymatically propelled silk swimmers with well-defined shapes is reported. The resulting devices are an example of self-propelled objects capable of generating motion without external actuation and have potential applications in medicine and environmental sciences for a variety of purposes ranging from micro-stirring, targeted therapeutic delivery, to water remediation (e.g., cleaning oil spills). This method employs reactive inkjet ...

Iron-Exchanged Zeolite Micromotors for Enhanced Degradation of Organic Pollutants.

Self-propelled iron-exchanged zeolite (Fe-zeolite) micromotors have been developed for efficient degradation of organic pollutants via Fenton-like reaction. The incorporation of iron ions into the zeolite framework, which was achieved by solid state ion exchange, imparts catalytic properties to the microporous structures. The coreagent for Fenton oxidation, hydrogen peroxide, also works as the fuel to propel the motion of the Fe-zeolite micromotors. Asymmetrically deposited platinum layer on the Fe-zeolites...


The combination of hawthorn extract and camphor significantly increases blood pressure: A meta-analysis and systematic review.

A fixed combination of hawthorn and camphor (Korodin Herz-Kreislauf-Tropfen) has been used in the therapy of hypotension for decades. Although its efficacy was evaluated in clinical trials, these studies have not been critically assessed in meta-analyses.

Perceiving animacy purely from visual motion cues involves intraparietal sulcus.

Distinguishing animate from inanimate objects is fundamental for social perception in humans and animals. Visual motion cues indicative of self-propelled object motion are useful for animacy perception: they can be detected over a wide expanse of visual field, at distance and in low visibility conditions, can attract attention and provide clues about object behaviour. However, the neural correlates of animacy perception evoked exclusively by visual motion cues, i.e. not relying on form, background or visual...

Full-color emission of a Eu-based mesoporous hybrid material modulated by Zn ions: emission color changes for Zn sensing via an ion exchange approach.

We reported on the fabrication of a multicolor fluorescent sensor for Zn2+ ions based on the Eu complex functionalized mesoporous hybrid material Eu(TTA-MSN)2L (TTA: 2-thenoyltrifluoroacetone, HL: 4'-(4-carboxy-methyleneoxyphenyl)-2,2':6',2''-terpyridinel). The material was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and N2 adsorption measurements. The results revealed that the material preserves mesoscopically ordered structures and exhibit...

Multifunctional motion-to-color janus transducers for the rapid detection of sepsis biomarkers in whole blood.

Self-propelled particles are revolutionizing sensing applications thanks to a unique motion-based signal generation mechanism in which biorecognition reactions are detected as changes in the velocity of the colloids. Here a new family of self-propelled multifunctional Janus particles is introduced that enables detecting changes in particle motion colorimetrically. The particles consist of an iron oxide core that provides color and magnetism, and a Janus coating that provides biospecific recognition and loco...

Self-propelled micromachines for analytical sensing: a critical review.

Self-propelled micromotors are micro- and nanoscale devices that move autonomously in solution by converting a specific stimulus into mechanical work. The broad scope of operations and applications along with the ultra-small dimensions have opened new possibilities to solve complex analytical challenges. Herein we give a critical overview of early developments and future prospects of such tiny moving objects for different analytical sensing and biosensing strategies. From early electrophoretic propelled nan...

Camphor elicits up-regulation of hepatic and pulmonary pro-inflammatory cytokines and chemokines via activation of NF-kB in rats.

Consumption of camphor infusions is widely used as an aphrodisiac in preparation for sexual intercourse, to boost performance. There is dearth of information associating or relating its consumption to liver or lung inflammation. Therefore, we investigated the effect of various doses of camphor in an acute study, on hepatic and pulmonary levels of some pro-inflammatory cytokines and chemokines in male wistar rats. Following administration, 2000 and 4000 mg/kg body weight camphor significantly increase live...

Advanced TiO2-SiO2-Sulfur (Ti-Si-S) Nanohybrid Materials: Potential Adsorbent for the Remediation of Contaminated Wastewater.

In this present work, TiO2-SiO2-sulfur (Ti-Si-S) nanohybrid material was successfully prepared by using TiO2 nano powder, TEOS sol-gel precursor and elemental sulfur as raw material by sol-gel process and hydrothermal method at 120 °C temperature. Raman spectroscopy, XRD, SEM, TEM and N2 absorption-desorption characterized the synthesized nanohybrid material. The characterization results confirmed the homogeneous distribution of sulfur in the nanohybrid material. The size of the Ti-Si-S nanohybrid material...

Proton Relay Network in P450cam Formed Upon Docking of Putidaredoxin (PdX).

Cytochromes P450 are versatile heme-based enzymes responsible for vital life processes. Of these, P450cam (substrate camphor) has been most studied. Despite this, precise mechanisms of the key O-O cleavage step remain partly elusive to date; effects observed in various enzyme mutants remain partly unexplained. We have carried out extended (to 1000 ns) MM-MD and follow-on QM/MM computations, both on the well-studied FeOO state and on Cpd(0) (Compound 0). Our simulations include (all camphor-bound): (1) WT (w...

Ag(I) camphor complexes: antimicrobial activity by design.

Eleven new complexes of general formula [Ag(NO)(L-Y)] corresponding to Ag(I) camphorimine complexes [Ag(NO)(OCHNY)] (Y=NMe (1); OH (2); CH (3); 4-MeCH, (4); 3,5-(CH)CH (5); 3-OHCH, (6); 3-ClCH (7); 4-ClCH (8); 4-FCH (9); 4-CFCH (10)) and the camphor sulfonylimine complex [Ag(NO)(OSNCHNY)] (Y=NH) were synthesized/characterized and their structural properties and antibacterial activity studied to gain insights into the structure-antimicrobial activity relationships. Five of the complexes were selected as repr...

Hierarchical FeO@carbon@MnO hybrid for electromagnetic wave absorber.

In this work, a novel FeO@C@MnO hybrid was successfully synthesized via facile method. The morphology, structure, chemical composition, magnetic behavior and EM wave absorbing performance of the hybrid were systematically investigated. Results indicate that the hybrid possesses uniform hierarchical and mesoporous structure. The magnetic saturation(Ms) value of the hybrid is 19.8 emu g, which is beneficial to improve magnetic loss. According to its reflection loss curve, the hybrid performs superior EM wave ...

Retrospective correction of motion-affected MR images using deep learning frameworks.

Motion is 1 extrinsic source for imaging artifacts in MRI that can strongly deteriorate image quality and, thus, impair diagnostic accuracy. In addition to involuntary physiological motion such as respiration and cardiac motion, intended and accidental patient movements can occur. Any impairment by motion artifacts can reduce the reliability and precision of the diagnosis and a motion-free reacquisition can become time- and cost-intensive. Numerous motion correction strategies have been proposed to reduce o...

Enzyme-Powered Nanomotors with Controlled Size for Biomedical Applications.

Self-propelled motors have been developed with promising potential for medical applications. However, most of them have a size range at the microscale, which limits their further research for experiments. Previously, our group developed nanoscaled motors with a size of around 400 nm with several merits, for example, delivering both hydrophobic and hydrophilic drugs/proteins, using biocompatible fuels while being able to control their motion, and showing adaptive changes of their speed and navigation to cha...

Workers' biomechanical loads and kinematics during multiple-task manual material handling.

This study investigated the biomechanical loads and kinematics of workers during multiple-task manual material handling (MMH) jobs, and developed prediction models for the moments acting on a worker's body and their peak joint angles. An experiment was conducted in which 20 subjects performed a total of 3780 repetitions of a box-conveying task. This task included continuous sequential removing, carrying and depositing of boxes weighing 2-12 kg. The subjects' motion was captured using motion-capture techno...

Supported growth of inorganic-organic nanoflowers on 3D hierarchically porous nanofibrous membrane for enhanced enzymatic water treatment.

Organic-inorganic nanoflower is a new type of functional material that can effectively immobilize a wide range of enzymes to form flower-like structures for various enzymatic applications with enhanced catalytic performance and stability. In order to avoid the processing inconvenience and flower structure damage caused by the particular form of these hybrid nanoflowers during material fabrication and catalytic application, different substrates have been used to carry out supported growth of hybrid nanoflowe...

Is calcium hydroxide more effective than formocresol or camphor phenol as intracanal disinfectants in acute pulpitis among deciduous teeth?

Data sources Cochrane Library, PubMed, Ovid, ScienceDirect, Wiley, China Biology Medicine (CBM), China National Knowledge Infrastructure (CNKI), Wan Fang and VIP Database for Chinese Technical Periodicals (VIP) databases were searched for articles dating from January 2000 to July 2018. Studies in languages other than English or Chinese were excluded.Study selection Randomised controlled trials comparing the clinical effectiveness of calcium hydroxide to formocresol or camphor phenol in acute pulpitis of dec...

MR-based cardiac and respiratory motion correction of PET: application to static and dynamic cardiac 18F-FDG imaging.

Motion of the myocardium deteriorates the quality and quantitative accuracy of cardiac PET images. We present a method for MR-based cardiac and respiratory motion correction of cardiac PET data and evaluate its impact on estimation of activity and kinetic parameters in human subjects. Three healthy subjects underwent simultaneous dynamic <sup>18</sup>F-FDG PET and MRI on a hybrid PET/MR scanner. A cardiorespiratory motion field was determined for each subject using navigator, tag...

In-situ synthesis of 3D ultra-small gold augmented graphene hybrid for highly sensitive electrochemical binding capability.

The fascinating properties of graphene can be augmented with other nanomaterials to generate hybrids to design innovative applications. Contrary to the conventional methodologies, we showed a novel yet simple, in-situ, biological approach which allowed for the effective growth of gold nanostructures on graphene surfaces (3D Au NS@GO). The morphology of the obtained hybrid consisted of sheets of graphene, anchoring uniform dispersion of ultra-small gold nanostructures of about 2-8 nm diameter. Surface plas...

Steering Active Emulsions with Liquid Crystals.

Colloids dispersed in liquid crystals (LCs) diffuse preferentially along the LC director because this direction of displacement generates the lowest hydrodynamic drag. In this paper, we report on active transport of micrometer-sized nematic droplets of 4'-pentyl-4-biphenylcarbonitrile (5CB) propelled through a continuous LC phase formed from aqueous solutions of disodium cromoglycate (DSCG) by Marangoni stresses (generated through addition of sodium dodecyl sulfate (SDS)). We observe the nematic droplets to...

Fast Domain Wall Motion Governed by Topology and Œrsted Fields in Cylindrical Magnetic Nanowires.

While the usual approach to tailor the behavior of condensed matter and nanosized systems is the choice of material or finite-size or interfacial effects, topology alone may be the key. In the context of the motion of magnetic domain walls (DWs), known to suffer from dynamic instabilities with low mobilities, we report unprecedented velocities >600  m/s for DWs driven by spin-transfer torques in cylindrical nanowires made of a standard ferromagnetic material. The reason is the robust stabilization of a ...

Physiological motion of the optic chiasm and its impact on stereotactic radiosurgery dose.

Avoidance of radiation-induced optic neuropathy (RION) from stereotactic radiosurgery (SRS) requires precise anatomical localization; however, no prior studies have characterized the physiologic motion of the optic chiasm. We measured the extent of chiasm motion and its impact on SRS dose.

Shape- and material-dependent self-propulsion of photocatalytic active colloids, interfacial effects, and dynamic inter-particle interactions.

Active colloids powered by self-generated, local chemical concentration gradients exhibit dynamics that is a function of the particles' morphology and materials properties. These characteristics also govern how the active colloids interact with surfaces, including other particles and nearby walls. Thus, by targeted design, the dynamic behavior, on average, can be engineered, despite a lack of ``external'' control such as an applied magnetic field. This allows for the development of new applications and the ...

Green synthesis of magnetic carbon nanodot/graphene oxide hybrid material (Fe3O4@C-nanodot@GO) for magnetic solid phase extraction of ibuprofen in human blood samples prior to HPLC-DAD determination.

In this study, a green production method was used to obtain magnetic carbon nanodot/graphene oxide hybrid material (FeO@C-nanodot@GO) for the magnetic solid phase extraction (MSPE) of ibuprofen (IBU) in human plasma prior to HPLC-DAD determination. For the first time in the literature, FeO@C-nanodot@GO hybrid material was synthesized and used as an adsorbent. C-nanodots were produced from pasteurized cow milk by using a simple and cheap hydrothermal method. After production of the C-nanodots and GO, FeO@C-n...


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