keyword
https://read.qxmd.com/read/38004914/u-shaped-tube-based-liquid-solid-triboelectric-nanogenerator-for-harvesting-unutilized-compressed-air-energy
#21
JOURNAL ARTICLE
Xuhang Cai, Zhijian Liu, Jingming Dong, Haoji Li, Jiamu Han, Jiaming Huang, Haotian Chen
Due to a lack of technologies that harvest green and sustainable energy, unutilized compressed air energy during the operation of pneumatic systems is wasted. Liquid-solid triboelectric nano-generators (L-S TENGs) have been widely used as an advanced technology with broad development prospects due to their advantages of a simple structure and long service life. Among them, liquid-solid triboelectric nanogenerators with tube structures have great potential for coupling multiple physical effects and integrating them into a single device...
November 2, 2023: Micromachines
https://read.qxmd.com/read/38000751/interlaboratory-comparison-of-centrifugal-ultrafiltration-with-icp-ms-detection-in-a-first-step-towards-methods-to-screen-for-nanomaterial-release-during-certification-of-drinking-water-contact-materials
#22
JOURNAL ARTICLE
Austin H Henke, Kenneth Flores, Aaron J Goodman, Kelly Magurany, Kerri LeVanseler, James Ranville, Jorge L Gardea-Torresdey, Paul K Westerhoff
A key requirement for evaluating the safety of nano-enabled water treatment devices is measuring concentrations of insoluble nanomaterials released from devices into water that may be ingested by consumers. Therefore, there is a need for simple technique that uses commonly available commercial laboratory techniques to discriminate between nanoparticles and dissolved by-products of the nanomaterial (e.g., ionic metals). Such capabilities would enable screening for particulate or dissolved metals released into water from nanomaterial-containing drinking water contact materials (e...
November 22, 2023: Science of the Total Environment
https://read.qxmd.com/read/37978922/evaluation-of-stem-cell-laden-collagen-polycaprolactone-multi-walled-carbon-nano-tubes-nano-neural-scaffold-with-and-without-insulin-like-growth-factor-i-for-sciatic-nerve-regeneration-post-crush-injury-in-wistar-rats
#23
JOURNAL ARTICLE
Mamta Mishra, Swapan Kumar Maiti, Kalaiselvan Elangovan, Shivaraju Shivaramu, Karam Pal Singh, Amitha Banu S, Merlin Mamachan, Manish Arya, Divya Mishra, Jurgen Hescheler
BACKGROUND/AIMS: All body functions are activated, synchronized and controlled by a substantial, complex network, the nervous system. Upon injury, pathophysiology of the nerve injury proceeds through different paths. The axon may undergo a degenerative retraction from the site of injury for a short distance unless the injury is near to the cell body, in which case it continues to the soma and undergoes retrograde neuronal degeneration. Otherwise, the distal section suffers from Wallerian degeneration, which is marked by axonal swelling, spheroids, and cytoskeleton degeneration...
November 15, 2023: Cellular Physiology and Biochemistry
https://read.qxmd.com/read/37956750/pd-cu-bimetallic-nano-catalyst-supported-on-anion-exchange-resin-a520e-for-nitrate-removal-from-water-high-property-and-stability
#24
JOURNAL ARTICLE
Zhanhui Shen, Menghao Fang, Li Tang, Jialu Shi, Wanfeng Wang
High nitrate concentration in water can lead to eutrophication and the disruption of healthy aquatic ecosystems. Additionally, in the human digestive system, it has the potential to be reduced to nitrite, which can be damaging to people's physical health. Catalytic hydrogenation of nitrate is one of the strategies for removing nitrate from water. Using A520E resin as support, we prepared Pd/Cu nano-catalyst (Pd/Cu@A520E) according to a liquid phase reduction method. A520E could improve the transfer process of nitrate in the solution to the activity sites of Pd/Cu nanoparticles, thus increase the reaction rate of nitrate reduction...
November 11, 2023: Environmental Research
https://read.qxmd.com/read/37955561/solvent-free-synthesis-of-hollow-carbon-nanostructures-for-efficient-sodium-storage
#25
JOURNAL ARTICLE
Shihao Feng, Kun Li, Ping Hu, Congcong Cai, Jinfeng Liu, Xinyuan Li, Liang Zhou, Liqiang Mai, Bao-Lian Su, Yong Liu
The structural characteristics of hollow carbon nanostructures (HCNs) result in intriguing physicochemical properties and various applications, especially for electrochemical energy storage applications. However, the currently solvent-based template methods to prepare HCNs are still far from meeting the facile, environment-friendly, and scalable demand. Herein, we explored a general and facile solvent-free block copolymer self-assembly approach to prepare various hollow hard carbon nanostructures, including hollow carbon nanofibers, hollow carbon Janus nanotadpoles, hollow carbon spheres, etc ...
November 28, 2023: ACS Nano
https://read.qxmd.com/read/37947717/medical-imaging-technology-for-micro-nanorobots
#26
REVIEW
Xuejia Liu, Yizhan Jing, Chengxin Xu, Xiaoxiao Wang, Xiaopeng Xie, Yanhe Zhu, Lizhou Dai, Haocheng Wang, Lin Wang, Shimin Yu
Due to their enormous potential to be navigated through complex biological media or narrow capillaries, microrobots have demonstrated their potential in a variety of biomedical applications, such as assisted fertilization, targeted drug delivery, tissue repair, and regeneration. Numerous initial studies have been conducted to demonstrate the biomedical applications in test tubes and in vitro environments. Microrobots can reach human areas that are difficult to reach by existing medical devices through precise navigation...
October 30, 2023: Nanomaterials
https://read.qxmd.com/read/37925879/effect-of-the-bare-and-functionalized-single-wall-carbon-nanotubes-on-inhibition-of-asphaltene-molecules-aggregation-a-molecular-dynamic-simulation
#27
JOURNAL ARTICLE
Farid Faraji Chanzab, Saber Mohammadi, Fatemeh Alemi Mahmoudi
A comprehensive study has been carried out by utilizing the molecular dynamics technique in order to investigate the behavior of the N-(1-hexylheptyl)-N'-(2-phenylpropanoicacid)-perylene-3,4,9,10-tetracarboxylicbisimide (PAP) molecules in the n-heptane/toluene solution as well as the role of the bare and functionalized single-wall carbon nanotubes (SWCNTs) with the carboxyl groups (-COOH) on the aggregation of PAP molecules. It was found that the CNTs benefit two mechanism of steric hindrance and adsorbing the PAP molecules to suppress the affinity of PAP molecules to association...
October 31, 2023: Journal of Molecular Graphics & Modelling
https://read.qxmd.com/read/37916081/synthesis-in-silico-mapping-for-anti-cancer-proviso-hardness-studies-of-d-gluconic-acid-monohydrate-crystals-for-usage-in-electronic-mechanical-and-biological-sectors
#28
JOURNAL ARTICLE
Padmanaban B, Maria P Nikolova, Shashank Kumar, SenthilKannan K
d-Gluconic acid monohydrate - DGAMH crystals are grown in a period of 61 days by using the customary slow evaporation method with a, b and c as 8.4309, 5.409 and 10.4071 in Å units; β as 96.87°; monoclinic system, space group as P21 . The material is an anticancer stipulation to inhibit them with the docked score of the DGAMH as -6.0 and -7.1 for both cases. Considering the mechanic behaviour of the DGAMH; the n as 7.57 of the DGAMH - work hardening coefficient value as Reverse ISE (indentation size effect) response for DGAMH...
October 2023: Heliyon
https://read.qxmd.com/read/37904555/optimization-of-double-gate-carbon-nanotube-fet-characteristics-for-short-channel-devices
#29
JOURNAL ARTICLE
Vijai M Moorthy, Rethinasamy Venkatesan, Viranjay M Srivastava
INTRODUCTION: Transistors are the fundamental electronic component integrated into electronic devices' chips Carbon Nano Tube (CNT) based field. METHODS: Effect Transistor (FET) is a promising component for next-generation transistor technologies; as it has high carrier mobility, device stability, and mechanical flexibility. Nevertheless, some shortcomings in the CNT FET's design prevent it from providing the best performance while preserving thermal stability. RESULTS: The structure and functionality of transistors with Double-Gate (DG) devices, which use carbon nanotubes as active channel regions, have been examined by the authors of this study...
September 19, 2023: Recent Patents on Nanotechnology
https://read.qxmd.com/read/37884576/lineage-specific-extracellular-vesicle-associated-protein-biomarkers-for-the-early-detection-of-high-grade-serous-ovarian-cancer
#30
JOURNAL ARTICLE
Camille V Trinidad, Harsh B Pathak, Shibo Cheng, Shin-Cheng Tzeng, Rashna Madan, Mihaela E Sardiu, Leonidas E Bantis, Clayton Deighan, Andrea Jewell, Sagar Rayamajhi, Yong Zeng, Andrew K Godwin
High grade serous ovarian carcinoma (HGSOC) accounts for ~ 70% of ovarian cancer cases. Non-invasive, highly specific blood-based tests for pre-symptomatic screening in women are crucial to reducing the mortality associated with this disease. Since most HGSOCs typically arise from the fallopian tubes (FT), our biomarker search focused on proteins found on the surface of extracellular vesicles (EVs) released by both FT and HGSOC tissue explants and representative cell lines. Using mass spectrometry, 985 EV proteins (exo-proteins) were identified that comprised the FT/HGSOC EV core proteome...
October 26, 2023: Scientific Reports
https://read.qxmd.com/read/37862812/micro-nano-patterns-for-enhancing-differentiation-of-human-neural-stem-cells-and-fabrication-of-nerve-conduits-via-soft-lithography-and-3d-printing
#31
JOURNAL ARTICLE
Jagoda Litowczenko, Jacek K Wychowaniec, Karol Załęski, Łukasz Marczak, Charlotte J C Edwards-Gayle, Krzysztof Tadyszak, Barbara M Maciejewska
Topographical cues on materials can manipulate cellular fate, particularly for neural cells that respond well to such cues. Utilizing biomaterial surfaces with topographical features can effectively influence neuronal differentiation and promote neurite outgrowth. This is crucial for improving the regeneration of damaged neural tissue after injury. Here, we utilized groove patterns to create neural conduits that promote neural differentiation and axonal growth. We investigated the differentiation of human neural stem cells (NSCs) on silicon dioxide groove patterns with varying height-to-width/spacing ratios...
October 10, 2023: Biomater Adv
https://read.qxmd.com/read/37832173/micelle-encapsulated-curcumin-and-piperine-laden-3d-printed-calcium-phosphate-scaffolds-enhance-in-vitro-biological-properties
#32
JOURNAL ARTICLE
Susmita Bose, Naboneeta Sarkar, Ujjayan Majumdar
Limitations in the current clinical management of critical-sized osseous defects have driven the need for multifunctional bone constructs. The ideal bone scaffold should possess advanced microarchitecture, well-defined pore interconnectivity, and supply biological signals, which actively guide and control tissue regeneration while simultaneously preventing post-implantation complications. Here, a natural medicine-based localized drug delivery from 3D printed scaffold is presented, which offers controlled release of curcumin, piperine from nano-sized polymeric micelles, and burst release of antibacterial carvacrol from the coating endowing the scaffold with their distinct, individual biological properties...
September 20, 2023: Colloids and Surfaces. B, Biointerfaces
https://read.qxmd.com/read/37812047/picosecond-pulsed-532%C3%A2-nm-laser-system-for-roughening-and-secondary-electron-yield-reduction-of-inner-surfaces-of-up-to-15%C3%A2-m-long-tubes
#33
JOURNAL ARTICLE
Elena Bez, Marcel Himmerlich, Benoit Beaudou, Ana Karen Reascos Portilla, Stefan Wackerow, Martino Rimoldi, Stephan Pfeiffer, Markus Wiesendanger, Fetah Benabid, Mauro Taborelli, Amin Abdolvand, Paolo Chiggiato
Laser-induced surface structuring is a promising method to suppress electron mulitpacting in the vacuum pipes of particle accelerators. Electrons are scattered inside the rough surface structure, resulting in a low Secondary Electron Yield (SEY) of the material. However, laser processing of internal pipe surfaces with a large aspect ratio is technologically challenging in terms of laser beam guidance and focusing. We present a 532 nm ultrashort-pulse laser setup to process the inner parts of 15 m long beam vacuum tubes of the Large Hadron Collider (LHC)...
October 1, 2023: Review of Scientific Instruments
https://read.qxmd.com/read/37803487/vacuum-tunneling-transistor-with-nano-vacuum-chamber-for-harsh-environments
#34
JOURNAL ARTICLE
Su Jin Heo, Jeong Hee Shin, Byoung Ok Jun, Jae Eun Jang
A nano vacuum tube which consists of a vacuum transistor and a nano vacuum chamber was demonstrated. For the device, a vacuum region is an electron transport channel, and a vacuum is a tunneling barrier. Tilted angle evaporation was studied for the formation of the nano level vacuum chamber structure. This vacuum tube was ultraminiaturized with several tens of 10-18 L scale volume and 10-6 Torr of pressure. The device structure made it possible to achieve a high integration density and to sustain the vacuum state in various real operations...
October 6, 2023: ACS Nano
https://read.qxmd.com/read/37755793/ameliorative-effect-of-thymoquinone-and-thymoquinone-nanoparticles-against-diazinon-induced-hepatic-injury-in-rats-a-possible-protection-mechanism
#35
JOURNAL ARTICLE
Walaa M Nassar, Wafaa M El-Kholy, Mamdouh R El-Sawi, Nagi M El-Shafai, Badriyah S Alotaibi, Heba I Ghamry, Mustafa Shukry
The health benefits of thymoquinone (TQ) have been a significant focus of numerous studies. However, more research is needed to ascertain whether its nano-form can effectively treat or prevent chronic diseases. In this study, we investigated how thymoquinone and its nanoparticles can mitigate liver damage induced by diazinon in male Wistar rats and explored the intracellular mechanisms involved. Forty-two Wistar male rats ( n = 42) were randomly allotted into seven groups. Group 1 served as the control. Group 2 (vehicle) consisted of rats that received corn oil via a gastric tube daily...
September 15, 2023: Toxics
https://read.qxmd.com/read/37715735/customized-loading-of-microrna-126-to-small-extracellular-vesicle-derived-vehicles-improves-cardiac-function-after-myocardial-infarction
#36
JOURNAL ARTICLE
Sruti Bheri, Milton E Brown, Hyun-Ji Park, Olga Brazhkina, Felipe Takaesu, Michael E Davis
Small extracellular vesicles (sEVs) are promising for cell-based cardiac repair after myocardial infarction. These sEVs encapsulate potent cargo, including microRNAs (miRs), within a bilayer membrane that aids sEV uptake when administered to cells. However, despite their efficacy, sEV therapies are limited by inconsistencies in the sEV release from parent cells and variability in cargo encapsulation. Synthetic sEV mimics with artificial bilayer membranes allow for cargo control but suffer poor stability and rapid clearance when administered in vivo ...
September 16, 2023: ACS Nano
https://read.qxmd.com/read/37708811/lead-recovery-from-waste-crt-funnel-glass-by-mechanochemical-reaction-with-reductive-al-powder
#37
JOURNAL ARTICLE
Wenyi Yuan, Zebing Wu, Qingbin Song, Qing Huang, Chenglong Zhang, John C Crittenden
The safe disposal of waste cathode ray tubes (CRTs) has always been a serious problem due to the stable microstructure of toxic lead (Pb) located in glass. Thousands of researches have been trying to explore environmental and efficient ways to dispose of waste CRTs. To recycle lead from waste CRT funnel glass effectively, a mechanochemical reduction method has been developed in this research. Aluminum was used as a reductant, and the hydrochloric acid solution was used in the leaching process to separate lead from the solution...
September 12, 2023: Waste Management
https://read.qxmd.com/read/37706868/optimization-of-phase-contrast-imaging-with-a-nano-focus-x-ray-tube
#38
JOURNAL ARTICLE
Hanna Dierks, Till Dreier, Robin Krüger, Martin Bech, Jesper Wallentin
Propagation-based phase contrast imaging with a laboratory x-ray source is a valuable tool for studying samples that show only low absorption contrast, either because of low density, elemental composition, or small feature size. If a propagation distance between sample and detector is introduced and the illumination is sufficiently coherent, the phase shift in the sample will cause additional contrast around interfaces, known as edge enhancement fringes. The strength of this effect depends not only on sample parameters and energy but also on the experimental geometry, which can be optimized accordingly...
July 10, 2023: Applied Optics
https://read.qxmd.com/read/37672891/effect-of-olive-flaxseed-and-grape-seed-nano-emulsion-essential-oils-on-semen-buffalo-freezability
#39
JOURNAL ARTICLE
Wael A Khalil, Mahmoud A E Hassan, Kandil A A Attia, Hassan A El-Metwaly, Mostafa A El-Harairy, Abdelaziz M Sakr, Sameh A Abdelnour
The existing treatise targeted to compare the effects of adding different nano-emulsions essential oils (olive, flaxseed, and grapeseed oils) in freezing extender on semen quality and freezability in buffalo. Nano-emulsions were prepared from olive, flaxseed, and grapeseed oils and characterized for their sizes and shapes. Semen extended in four tubes were supplemented with 0 (control) and 3.5% nanoemulsion oils, including olive (NEO), flaxseed (NEFO) and grape seed oils (NEGSO) respectively. NEGSO resulted in the highest (p < 0...
August 30, 2023: Theriogenology
https://read.qxmd.com/read/37658803/solid-phase-photothermo-induced-chemical-vapor-generation-a-new-desorption-method-for-mercury-analysis-by-high-throughput-20-fiber-direct-immersion-solid-phase-microextraction
#40
JOURNAL ARTICLE
Yubin Su, Yao Lin, Tian Ren, Yuanyuan Li, Yurong Deng, Chengbin Zheng
A simple solid phase photothermo-induced chemical vapor generation (SP-PT-CVG) is described and used as an environmentally friendly desorption method for the sensitive determination of mercury in water by direct immersion solid phase microextraction (DI-SPME) atomic fluorescence spectrometry (AFS). A DI-SPME array equipped with 20 nano-TiO2 -coated tungsten fibers was employed to simultaneously preconcentrate mercury from 20 samples, enabling an extraction throughput of 40 samples per hour. Subsequently, the fibers were drawn from the sample solutions and inserted into an inner tube sealed in a specially designed UV lamp in turn for SP-PT-CVG to generate Hg0 , which was swept to an AFS detector for its detection...
September 2, 2023: Analytical Chemistry
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