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Journal articles on the topic 'Nano-tubular'

Author: Grafiati

Published: 3 June 2025

Last updated: 22 June 2025

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1

Xu, Yi Kun, and Mao-Sheng Zhan. "Gradient Microstructure Analysis of PI-SiO2 Hybrid Tubular Films." Materials Science Forum 475-479 (January 2005): 1575–78. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.1575.

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PI-SiO2 hybrid seamless tubular films with gradient microstructure were prepared by sol-gel insitu polymerization and rotational moulding process. Energy Dispersive X-Ray Spectrometry (EDS) and Field Emitter Scanning Electron Microscope (FE-SEM) were used to evaluate the spatial gradient distribution of SiO2 in the PI-SiO2 hybrid tubular films. The experimental results showed that the SiO2 particles were dispersed at nanoscale in the PI matrix, and that the size and the dispersivity of the SiO2 particles changed gradiently along the tubular film cross-section. The lower the SiO2 distribution density, the smaller the SiO2 particles. When the SiO2 content exceeded a certain value, some SiO2 nano-particles aggregated into nano-clusters with thyrsiform structure, and the nano-clusters aggregated more into limbate globoids.

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2

Koutinas, Athanasios A., Vasilios Sypsas, Panagiotis Kandylis, et al. "Nano-Tubular Cellulose for Bioprocess Technology Development." PLoS ONE 7, no. 4 (2012): e34350. http://dx.doi.org/10.1371/journal.pone.0034350.

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3

Li, Shasha, Rui Liu, Deribachew Bekana, Yujian Lai, and Jingfu Liu. "Self-assembly of supramolecular nanotubes/microtubes from 3,5-dimethyl-4-iodopyrazole for plasmonic nanoparticle organization." Nanoscale 10, no. 44 (2018): 20804–12. http://dx.doi.org/10.1039/c8nr07372d.

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We developed a simple but effective building block, 3,5-dimethyl-4-iodopyrazole, which can hierarchically self-assemble into tubular nano-/micro-architectures. The tubular assemblies can be utilized as an excellent template for the controlled organization of Au/Ag NPs.

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4

Syssa-Magalé, Jean-Laurent, Kamal Boubekeur, Jacques Leroy, Lise-Marie Chamoreau, Claire Fave, and Bernd Schöllhorn. "Directed synthesis of a halogen-bonded open porphyrin network." CrystEngComm 16, no. 45 (2014): 10380–84. http://dx.doi.org/10.1039/c4ce01704h.

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5

Neamatallah, Thikryat, Nagla El-Shitany, Aymn Abbas, et al. "Nano Ellagic Acid Counteracts Cisplatin-Induced Upregulation in OAT1 and OAT3: A Possible Nephroprotection Mechanism." Molecules 25, no. 13 (2020): 3031. http://dx.doi.org/10.3390/molecules25133031.

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Cisplatin is an anticancer drug commonly used for solid tumors. However, it causes nephrotoxicity. OAT1 and OAT3 are organic anion transporters known to contribute to the uptake of cisplatin into renal tubular cells. The present study was designed to examine the protective role of ellagic acid nanoformulation (ellagic acid nano) on cisplatin-induced nephrotoxicity in rats, and the role of OAT1/OAT3 in this effect. Four groups of male Wistar rats were used (n = 6): (1) control, (2) cisplatin (7.5 mg/kg single dose, intraperitoneal), (3) cisplatin + ellagic acid nano (1 mg/kg), and (4) cisplatin + ellagic acid nano (2 mg/kg). Nephrotoxic rats treated with ellagic acid nano exhibited a significant reduction in elevated serum creatinine, urea, and oxidative stress marker, malondialdehyde (MDA). Additionally, ellagic acid nano restored renal glutathione (GSH), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx). Ellagic acid nano improved the histopathological changes induced by cisplatin, such as tubular dilatation, necrosis, and degeneration. Interestingly, OAT1 and OAT3 showed significantly lower expression at both mRNA and protein levels following ellagic acid nano treatment relative to the cisplatin-exposed group. These findings reveal a potential inhibitory role of ellagic acid antioxidant on OAT1 and OAT3 expression and thus explains its nephroprotective effect against cisplatin nephrotoxicity.

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6

Choi, Seung Won, Hyung Jin Kim, Woong Ki Jang, Young Ho Seo, and Byeong Hee Kim. "Tubular Nano-Mesh Fabrication by Aluminum Anodic Oxidation." Journal of the Korean Society for Precision Engineering 34, no. 7 (2017): 501–5. http://dx.doi.org/10.7736/kspe.2017.34.7.501.

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7

Razeeb, Kafil M., Joanna Podporska-Carroll, Mamun Jamal, et al. "Antimicrobial properties of vertically aligned nano-tubular copper." Materials Letters 128 (August 2014): 60–63. http://dx.doi.org/10.1016/j.matlet.2014.04.130.

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8

Kong, Chunlong, Hongbing Du, Liang Chen, and Banglin Chen. "Nanoscale MOF/organosilica membranes on tubular ceramic substrates for highly selective gas separation." Energy & Environmental Science 10, no. 8 (2017): 1812–19. http://dx.doi.org/10.1039/c7ee00830a.

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9

Yun, Ruirui, Yaqin Jiang, Shizhong Luo, and Cheng Chen. "Three-dimensional coordination polymers constructed from C2-symmetric linkers of pyridyl dicarboxylate ligands." RSC Adv. 4, no. 69 (2014): 36845–48. http://dx.doi.org/10.1039/c4ra07128j.

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10

Srivastava, Amit, Jamal Hassan, and Dirar Homouz. "Effect of Size and Temperature on Water Dynamics inside Carbon Nano-Tubes Studied by Molecular Dynamics Simulation." Molecules 26, no. 20 (2021): 6175. http://dx.doi.org/10.3390/molecules26206175.

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Water transport inside carbon nano-tubes (CNTs) has attracted considerable attention due to its nano-fluidic properties, its importance in nonporous systems, and the wide range of applications in membrane desalination and biological medicine. Recent studies show an enhancement of water diffusion inside nano-channels depending on the size of the nano-confinement. However, the underlying mechanism of this enhancement is not well understood yet. In this study, we performed Molecular Dynamics (MD) simulations to study water flow inside CNT systems. The length of CNTs considered in this study is 20 nm, but their diameters vary from 1 to 10 nm. The simulations are conducted at temperatures ranging from 260 K to 320 K. We observe that water molecules are arranged into coaxial water tubular sheets. The number of these tubular sheets depends on the CNT size. Further analysis reveals that the diffusion of water molecules along the CNT axis deviates from the Arrhenius temperature dependence. The non-Arrhenius relationship results from a fragile liquid-like water component persisting at low temperatures with fragility higher than that of the bulk water.

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11

Srivastava, Amit, Jamal Hassan, and Dirar Homouz. "Effect of Size and Temperature on Water Dynamics inside Carbon Nano-Tubes Studied by Molecular Dynamics Simulation." Molecules 26, no. 20 (2021): 6175. http://dx.doi.org/10.3390/molecules26206175.

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Water transport inside carbon nano-tubes (CNTs) has attracted considerable attention due to its nano-fluidic properties, its importance in nonporous systems, and the wide range of applications in membrane desalination and biological medicine. Recent studies show an enhancement of water diffusion inside nano-channels depending on the size of the nano-confinement. However, the underlying mechanism of this enhancement is not well understood yet. In this study, we performed Molecular Dynamics (MD) simulations to study water flow inside CNT systems. The length of CNTs considered in this study is 20 nm, but their diameters vary from 1 to 10 nm. The simulations are conducted at temperatures ranging from 260 K to 320 K. We observe that water molecules are arranged into coaxial water tubular sheets. The number of these tubular sheets depends on the CNT size. Further analysis reveals that the diffusion of water molecules along the CNT axis deviates from the Arrhenius temperature dependence. The non-Arrhenius relationship results from a fragile liquid-like water component persisting at low temperatures with fragility higher than that of the bulk water.

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12

Liu, Mengzhu, Hongwei Wang, Yangyang Lv, et al. "Construction of OH-functionalized MWCNT/solid waste composites with tubular/spherical heterostructures for enhanced electromagnetic wave absorption property." RSC Advances 12, no. 25 (2022): 16003–13. http://dx.doi.org/10.1039/d2ra01960d.

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13

Yao, Chang, and Thomas J. Webster. "Anodization: A Promising Nano-Modification Technique of Titanium Implants for Orthopedic Applications." Journal of Nanoscience and Nanotechnology 6, no. 9 (2006): 2682–92. http://dx.doi.org/10.1166/jnn.2006.447.

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Anodization is a well-established surface modification technique that produces protective oxide layers on valve metals such as titanium. Many studies have used anodization to produce micro-porous titanium oxide films on implant surfaces for orthopedic applications. An additional hydrothermal treatment has also been used in conjunction with anodization to deposit hydroxyapatite on titanium surfaces; this is in contrast to using traditional plasma spray deposition techniques. Recently, the ability to create nanometer surface structures (e.g., nano-tubular) via anodization of titanium implants in fluorine solutions have intrigued investigators to fabricate nano-scale surface features that mimic the natural bone environment. This paper will present an overview of anodization techniques used to produce micro-porous titanium oxide structures and nano-tubular oxide structures, subsequent properties of these anodized titanium surfaces, and ultimately their in vitro as well as in vivo biological responses pertinent for orthopedic applications. Lastly, this review will emphasize why anodized titanium structures that have nanometer surface features enhance bone forming cell functions.

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14

Zhen, Hongpeng, Xiaolin Li, Lijuan Zhang, et al. "Polyoxometalate-based layered nano-tubular arrays: facile fabrication and superior performance for catalysis." RSC Advances 5, no. 31 (2015): 24550–57. http://dx.doi.org/10.1039/c5ra01247c.

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Keggin-type polyoxoanion PW<sub>12</sub>O<sub>40</sub><sup>3−</sup>-containing one-dimensional nano-tubular arrays fabricated within porous templates show a superior performance just through simple filtrating processes.

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15

Siddiqui, Shazia, Keshav K. Manglam, Anubha Srivastav, Rehan A. Khan, Preeti Rastogi, and Samra Shafique. "Evaluation of the Efficacy of LASER, Desensitizing Agents, and their Combined Effect on Dentinal Hypersensitivity in Bicuspids: In Vitro Study." Journal of Pharmacy and Bioallied Sciences 16, Suppl 1 (2024): S418—S422. http://dx.doi.org/10.4103/jpbs.jpbs_639_23.

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ABSTRACT Aim: This study aimed to know the potential of diode light amplification by stimulated emission of radiation (LASER) and desensitizing agents on blocking the dentinal tubules, which may further help in reducing the most common dental problem named dentinal hypersensitivity (DH). Materials and Methods: Sixty human permanent bicuspids were selected, and preparation was performed in the cervical region measuring 2.5 mm × 2.5 mm × 2.5 mm, followed by acid etching for 15 seconds. These are then divided according to the groups mentioned: group 1—nano-hydroxyapatite (HA) was applied for 15 minutes; group 2—biosilicate was applied for 15 minutes; group 3—diode LASER application was performed twice for 60 seconds in noncontact mode; group 4—nano-HA plus diode LASER application; and group 5—biosilicate plus diode LASER application. The same procedure was followed on the 1st, 7th, and 14th days and then rinsed and stored in artificial saliva, and the saliva was changed every 24 hours. The dentinal tubular occlusion was observed under a scanning electron microscope (SEM) after the 14th day. Result: The maximum dentinal tubular occlusion was observed in group 4, where nano-HA and diode LASER application was performed. Conclusion: All the investigated treatment groups have promising occluding potential, but the maximum was found in group 4 >group 5 >group 3 >group 1 >group 2. LASER plus desensitizing together prove to be potent and effective in reducing dentinal tubular diameter.

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16

Cui, Huaiyu, Zhiyuan Wang, Shan Wu, Haojie An, Jinshi Wang, and Yongpeng Zhao. "Focusing and Wavefront Splitting of an Extreme Ultraviolet Laser with a Tubular Optical Element." Photonics 10, no. 6 (2023): 629. http://dx.doi.org/10.3390/photonics10060629.

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A capillary discharge extreme ultraviolet laser is focused and wavefront split at 46.9 nm by a tubular optical element. The reflectivity at 46.9 nm is both simulated and measured to be higher than 90% with a slight optical aberration. The operating principle of the tubular element for focusing and wavefront splitting is discussed. Dense and intense grating-like fringes with a period of ~150 nm are achieved. The method used in this work allows nano-scale processing with extreme ultraviolet laser at single-shot exposure mode.

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17

He, Kang, Yu Chen, and Wentao Xie. "Test on axial compression performance of nano-silica concrete-filled angle steel reinforced GFRP tubular column." Nanotechnology Reviews 8, no. 1 (2019): 523–38. http://dx.doi.org/10.1515/ntrev-2019-0047.

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AbstractThis paper attempts to investigate the effect of various parameters on the axial compressive behavior of nano-silica concrete-filled angle steel reinforced GFRP tubular columns. The proposed new composite column consists of three parts: the outer GFRP tube, the inner angle section steel and the nano-silica concrete filled between GFRP tube and angle section steel. Twenty-seven specimens with different nano-silica concrete compressive strength (20MPa, 30MPa and 40MPa), diameter-to-thickness ratio of GFRP tube (20, 25 and 40) and steel ratio (0.008, 0.022 and 0.034) were tested under axial load. The main purpose of this study is to examine the effect of the three parameters on the following: failure modes, deformation capacity, load bearing capacity, ductility and initial stiffness of the new composite column under axial load. It was found that the load bearing capacity and initial stiffness increased as the nano-silica concrete compressive strength of the specimens increased. But the specimens with higher nano-silica concrete compressive strength showed lower deformation capacity than that of the specimens with lower nano-silica concrete compressive strength. The varieties of the steel ratio have no significant effect on the specimens’ axial deformation behavior. Experimental results also showed that both load bearing capacity and deformation capacity increased with the decrease of diameter-to-thickness ratio of GFRP tube. However, diameter-to-thickness ratio of GFRP tube has no significant effect on the initial stiffness of specimens. The confinement coefficient was proposed to better evaluate the confinement effect of GFRP tube on the inner angle section steel reinforced core nano-silica concrete. The confinement effect of GFRP tube on lower strength concrete was better, and the confinement effect reduced as the diameter-to-thickness ratio of GFRP tube increased. The design formulas for the load bearing capacity of the nano-silica concrete-filled angle steel reinforced GFRP tubular columns under axial load were proposed.

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18

Chih, Y. K., C. H. Chen, J. Hwang, A. P. Lee, and C. S. Kou. "Formation of nano-scale tubular structure of single crystal diamond." Diamond and Related Materials 13, no. 9 (2004): 1614–17. http://dx.doi.org/10.1016/j.diamond.2004.01.018.

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19

Du, Haijuan, Mengyuan Yue, Xin Huang, et al. "Preparation, Application and Enhancement Dyeing Properties of ZnO Nanoparticles in Silk Fabrics Dyed with Natural Dyes." Nanomaterials 12, no. 22 (2022): 3953. http://dx.doi.org/10.3390/nano12223953.

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In this study, ZnO nanoparticles were prepared by a hydrothermal method with varying the reaction times, material ratios and reaction temperatures. The samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray Diffraction (XRD) and Fourier infrared spectroscopy (FTIR). It was shown that the material ratio significantly affected the structure and morphology of the synthesized ZnO nanoparticles, and then the uneven nano-octahedral structure, uniform nano-octahedral structure, nano-tubular structure, and nano-sheet structure could be obtained successively. The synthesized ZnO nanoparticles as mordant were used for the dyeing of silk fabrics with different natural dyes (tea polyphenols and hematoxylin). Moreover, they could improve the dyeing properties and fastness (wash and light) on silk fabrics to a certain extent.

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20

OWOLABI, DR JOSEPH. "The Characterization of Nanomaterias Using Scanning Electron Microscopy and Environmental Applications." Journal of Technology Innovations and Energy 1, no. 1 (2022): 34–37. http://dx.doi.org/10.56556/jtie.v1i1.195.

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Nano materials are classes of substances that have structural components smaller than 100nm and this includes nanoparticles with at least 2-D between 1 and 100nm in the Nano scale. Nano materials have small size which having at least 1-D 100nm or less. It can be Nano scale in 1-D, 2-D, or 3-D and exist in single, fused, aggregated forms with spherical, tubular and irregular shape. The samples of Nano materials were analyzed with scanning electron microscopy to provide images of Nano particles and their agglomerates in sufficient resolution that gives images of Nano materials with clearly identifiable particles. Nano materials have significant commercial impacts that can be increased in the future. Nano materials have good potential for developing the ways in which materials are generated that, the range and nature of functionalities can be accessed. Applications of Nano materials in the environment are different from one another depending on the type of devices used such as nanotechnologies in coatings for exterior surfaces, solar cells for renewable energy and de-colorization of dyes by the effect of Nano composites, medicine, textile, household, construction, chemical, automotive, electronics and engineering industries.

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21

He, Tian-Qu, Zhi Wang, Chuang-Ye Li, et al. "Sulfated Laminarin Polysaccharides Reduce the Adhesion of Nano-COM Crystals to Renal Epithelial Cells by Inhibiting Oxidative and Endoplasmic Reticulum Stress." Pharmaceuticals 17, no. 6 (2024): 805. http://dx.doi.org/10.3390/ph17060805.

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Purpose: Adhesion between calcium oxalate crystals and renal tubular epithelial cells is a vital cause of renal stone formation; however, the drugs that inhibit crystal adhesion and the mechanism of inhibition have yet to be explored. Methods: The cell injury model was constructed using nano-COM crystals, and changes in oxidative stress levels, endoplasmic reticulum (ER) stress levels, downstream p38 MAPK protein expression, apoptosis, adhesion protein osteopontin expression, and cell–crystal adhesion were examined in the presence of Laminarin polysaccharide (DLP) and sulfated DLP (SDLP) under protected and unprotected conditions. Results: Both DLP and SDLP inhibited nano-COM damage to human kidney proximal tubular epithelial cell (HK-2), increased cell viability, decreased ROS levels, reduced the opening of mitochondrial membrane permeability transition pore, markedly reduced ER Ca2+ ion concentration and adhesion molecule OPN expression, down-regulated the expression of ER stress signature proteins including CHOP, Caspase 12, and p38 MAPK, and decreased the apoptosis rate of cells. SDLP has a better protective effect on cells than DLP. Conclusions: SDLP protects HK-2 cells from nano-COM crystal-induced apoptosis by reducing oxidative and ER stress levels and their downstream factors, thereby reducing crystal–cell adhesion interactions and the risks of kidney stone formation.

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22

Zhang, Xiaoyong, Chang Xia, and Yu Chen. "Research on nano-concrete-filled steel tubular columns with end plates after lateral impact." REVIEWS ON ADVANCED MATERIALS SCIENCE 60, no. 1 (2021): 553–66. http://dx.doi.org/10.1515/rams-2021-0044.

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Abstract This paper presents thirteen square columns to study the behavior of nano-concrete-filled steel tubular columns with end plates after lateral impact. The failure modes of the square columns subjected to lateral impact damage or not subjected to lateral impact damage were compared. The lateral impact loading height, steel tubular thickness, and column height were set as the test parameters in these tests. The effects of test parameters on the ultimate capacity, initial stiffness, and ductility of columns are discussed in this paper. The bearing capacity of square columns is decreased because of the lateral impact loading which can also be concluded from the test results. And with the steel tube thickness increasing, the bearing capacity and initial stiffness of columns are increased and ductility has no obvious change. However, with the column height increasing, the bearing capacity and stiffness of columns are decreased and ductility is increased. Furthermore, the strain development of the columns under axial compressive loading is also discussed in the paper. The results indicated that the corner of the square column is more easily damaged under compressive loading. According to the test results, the calculated formula is proposed to predict the ultimate capacity of nano-concrete-filled steel tubular columns with end plates after lateral impact. The calculated results have a good agreement with the test results.

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23

Antonova, N. "Electron microscope investigation of aluminium-comprising nanoparticles." World Journal of Engineering 11, no. 3 (2014): 209–12. http://dx.doi.org/10.1260/1708-5284.11.3.209.

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A new approach was suggested for creating nano-dimensional materials based on water-soluble polymers. Nano-seized Al-contained structures were synthesized; such structures were screened by a cover of sodium-carboxymethylcellulose by heating up to 70-80 degrees of Celsius of a sodium-carboxymethylcellulose's polymere with Al microparticles with dimension less than 20 mkm. Morphological features of created composites were researched. It was established that agglomerates of received particles were reached values of 300-600 nm and consisted of tubular types' structures with dimensions 80-100 nm.

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24

MIYAZAWA, K., S. CHA, C. RINGOR, et al. "SYNTHESIS OF FULLERENE NANOTUBES AND MICROTUBES FOR MATERIALS STORAGE, DELIVERY AND RECOVERY." Nano 03, no. 05 (2008): 335–39. http://dx.doi.org/10.1142/s1793292008001167.

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Tubular, needle-like crystals of C 60 with diameters ranging from micro to nano sizes have been synthesized by the liquid–liquid interfacial precipitation (LLIP) method. The C 60 nano- and microtubes can absorb various solutions of alcohol and water, showing that they can be promising containers for materials storage and recovery. Further, C 60 microtubes vertically aligned on porous alumina membranes have been successfully prepared for the first time by a modified LLIP method. The vertically aligned C 60 microtubes will find a variety of application for bio and environmental uses.

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25

Hsu, Shu-Min, Chaker Fares, Xinyi Xia, et al. "In Vitro Corrosion of SiC-Coated Anodized Ti Nano-Tubular Surfaces." Journal of Functional Biomaterials 12, no. 3 (2021): 52. http://dx.doi.org/10.3390/jfb12030052.

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Peri-implantitis leads to implant failure and decreases long-term survival and success rates of implant-supported prostheses. The pathogenesis of this disease is complex but implant corrosion is believed to be one of the many factors which contributes to progression of this disease. A nanostructured titanium dioxide layer was introduced using anodization to improve the functionality of dental implants. In the present study, we evaluated the corrosion performance of silicon carbide (SiC) on anodized titanium dioxide nanotubes (ATO) using plasma-enhanced chemical vapor deposition (PECVD). This was investigated through a potentiodynamic polarization test and bacterial incubation for 30 days. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to analyze surface morphologies of non-coated and SiC-coated nanotubes. Energy dispersive X-ray (EDX) was used to analyze the surface composition. In conclusion, SiC-coated ATO exhibited improved corrosion resistance and holds promise as an implant coating material.

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26

Gialleli, Angelika-Ioanna, Argyro Bekatorou, Maria Kanellaki, Poonam Nigam, and Athanasios A. Koutinas. "Apple juice preservation through microbial adsorption by nano/micro-tubular cellulose." Innovative Food Science & Emerging Technologies 33 (February 2016): 416–21. http://dx.doi.org/10.1016/j.ifset.2015.11.006.

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27

Hassan, Sadaf ul, Murtaza Hasan, Attia Firdous, and Muhammad Asim Farid. "Preparation, Characterization and In Vitro Biological Evaluation of Nano-Tubular Polyoxometalate." Journal of Nanoscience and Nanotechnology 17, no. 7 (2017): 4882–87. http://dx.doi.org/10.1166/jnn.2017.13459.

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Thalib, M. Mohamed, Athikesavan Muthu Manokar, Fadl A. Essa, N. Vasimalai, Ravishankar Sathyamurthy, and Fausto Pedro Garcia Marquez. "Comparative Study of Tubular Solar Stills with Phase Change Material and Nano-Enhanced Phase Change Material." Energies 13, no. 15 (2020): 3989. http://dx.doi.org/10.3390/en13153989.

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This study is intended to investigate and analyze the operational performances of the Conventional Tubular Solar Still (CTSS), Tubular Solar Still with Phase Change Material (TSS-PCM) and Tubular Solar Still with Nano Phase Change Material (TSS-NPCM). Paraffin wax and graphene plusparaffin wax were used in the CTSS to obtain the modified solar still models. The experimental study was carried out in the three stills to observe the operational parameters at a water depth of 1 cm. The experiment revealed that TSS-NPCM showed the best performance and the highest yield in comparison to other stills. The distillate yield from the CTSS, TSS-PCM and TSS-NPCM was noted to be 4.3, 6.0 and 7.9 kg, respectively, the daily energy efficiency of the stills was observed to be 31%, 46% and 59%, respectively, and the daily exergy efficiency of the stills was recorded to be 1.67%, 2.20% and 3.75%, respectively. As the performance of the TSS-NPCM was enhanced, the cost of freshwater yield obtained was also low in contrast to the other two types of stills.

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Thi Hang, Bui, and Nguyen Thi Lan. "Iron-carbon based materials as negative electrode for energy storage devices." Advances in Natural Sciences: Nanoscience and Nanotechnology 15, no. 3 (2024): 035001. http://dx.doi.org/10.1088/2043-6262/ad2c7c.

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Abstract The effect of various carbon nanofibers (CNF) on the electrochemical properties of iron/carbon (Fe/C) composite electrodes has been investigated to find a suitable carbon additive for iron-based battery anode. The structure and characteristics of carbon such as particle size, surface area strongly affected the cycling performance of Fe/C composite electrode. Different types of CNF structures (herringbone and tubular) have been investigated and tubular type exhibited higher discharge capacity. The x-ray energy dispersive spectroscopy (EDS) revealed that iron species are dispersed on carbon surface during cycling, which may improve the electrochemical properties of the Fe/C composite electrodes. The aggregation of iron species into large particles on the carbon surface via dissolution-deposition process during cycling increased the resistance of the Fe/C electrode. This phenomenon caused the reduced redox current and discharge capacity of electrode during cycling. The electrochemical active material type and their particle size also influenced the cycling performance of electrode. When Fe was replaced by Fe2O3, the Fe2O3/C composite electrode provided larger capacity than Fe/C composite electrode. The discharge capacity of nano-Fe2O3/tubular CNF composite electrode was larger than that of micro-Fe2O3/tubular CNF composite electrode.

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Zhang, Wei, Xiangjun Zhou, Qisheng Yao, Yutao Liu, Hao Zhang, and Zheng Dong. "HIF-1-mediated production of exosomes during hypoxia is protective in renal tubular cells." American Journal of Physiology-Renal Physiology 313, no. 4 (2017): F906—F913. http://dx.doi.org/10.1152/ajprenal.00178.2017.

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Exosomes are nano-sized vesicles produced and secreted by cells to mediate intercellular communication. The production and function of exosomes in kidney tissues and cells remain largely unclear. Hypoxia is a common pathophysiological condition in kidneys. This study was designed to characterize exosome production during hypoxia of rat renal proximal tubular cells (RPTCs), investigate the regulation by hypoxia-inducible factor-1 (HIF-1), and determine the effect of the exosomes on ATP-depletion-induced tubular cell injury. Hypoxia did not change the average sizes of exosomes secreted by RPTCs, but it significantly increased exosome production in a time-dependent manner. HIF-1 induction with dimethyloxalylglycine also promoted exosome secretion, whereas pharmacological and genetic suppression of HIF-1 abrogated the increase of exosome secretion under hypoxia. The exosomes from hypoxic RPTCs had inhibitory effects on apoptosis of RPTCs following ATP depletion. The protective effects were lost in the exosomes from HIF-1α knockdown cells. It is concluded that hypoxia stimulates exosome production and secretion in renal tubular cells. The exosomes from hypoxic cells are protective against renal tubular cell injury. HIF-1 mediates exosome production during hypoxia and contributes to the cytoprotective effect of the exosomes.

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Tonoyan, Anahit O., Anahit Z. Varderesyan, Armine G. Ketyan, Aram H. Minasyan, Karlen O. Hovnanyan, and Sevan P. Davtyan. "Continuous reactors of frontal polymerization in flow for the synthesis of polyacrylamide hydrogels with prescribed properties." Journal of Polymer Engineering 40, no. 7 (2020): 601–6. http://dx.doi.org/10.1515/polyeng-2019-0369.

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AbstractTaking into account the fact that since the 1970s frontal polymerization (FP) reactors in flow have been the subject of our study, the work gives a brief chronology of the development of FP reactors for the synthesis of high molecular polymers, polymeric hydrogels with cross-linked structure, their advantages and drawbacks. The reasons for the impossibility of the practical implementation of tubular FP reactors in flow for the synthesis of polymers are established. The possibility of implementation of tubular FP reactors for the synthesis of polyacrylamide hydrogels (PAH) capable of absorbing and releasing large amount of water is presented. The paper also presents some data on the methods for the synthesis of PAHs with prescribed properties in tubular continuous FP reactors by way of using nano-additives and regulating the kinetics of the synthesis process. As a result, the synthesis process of PAHs with the required properties both in the absorption and release of water, and in the physical-mechanical properties was carried out in frontal tubular-type reactors in flow, and the water absorption kinetic curves and physical-mechanical properties of the obtained hydrogels are presented.

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Ji, Juan, Zhaoyu Bi, Ling Tian, Qian Zhang, Shu-fen Hou та Song Li. "Nano-Sustained CO-Releasing Molecules Alleviates Cyclosporin-A-Induced Nephrotoxicity and Renal Fibrosis by Inhibiting NLRP3 Inflammasome-Mediated TGF-β/Smad Signaling Pathway". Journal of Clinical and Nursing Research 7, № 3 (2023): 149–56. http://dx.doi.org/10.26689/jcnr.v7i3.4806.

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Objective: To investigate the effect nano-sustained CO-releasing molecules on cyclosporin-A (CsA)-induced nephrotoxicity by inhibiting the NLRP3 inflammasome-mediated TGF-β/Smad signaling pathway. Methods: 3×105 cell/mL human renal tubular epithelial cells (HK-2) and mouse primary cultured renal tubular epithelial cells (RTECs) were cultured under an inverted microscope and incubated with 10% DMEM and 0.25% β2M in NaCl solution for 3 h. HK-2 and RTECs were divided into 5 complex numbers. MTT assay was used to detect the relative proliferation level of one of the HK-2 cells and calculate the multiplication ratio. Results: The nano-sustained CO-releasing molecules CS-CO had a strong protective effect on the kidney. HK-2 and RTECs cells were treated with siRNA, inhibitors, and NLRP3 knockout mice, and the changes in cell activity and expression of intracellular inflammatory factors were studied. The expression of TGF-β1/Smad signaling pathway related proteins in HK-2 and RTECs was detected by ELISA, western blot, immunofluorescence, and other techniques. Conclusion: SMA/CORM2 alleviates CsA-induced renal fibrosis by inhibiting NLRP3 inflammasome-mediated TGF-β/Smad signaling pathway.

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Seftian Amanda, Muhammad, Muhammad Amin, and Teuku Azuar Rizal. "Optimization of Tubular Solar Distillation Performance With Nano-PCM and Parabolic Trough Collector." JURUTERA - Jurnal Umum Teknik Terapan 11, no. 02 (2024): 131–36. https://doi.org/10.55377/jurutera.v11i02.11148.

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Solar distillation is a desalination method that utilizes solar energy to convert saline water into freshwater. However, the efficiency of this process is often limited by temperature fluctuations and low heat storage capacity. Phase Change Material (PCM) has been used as a thermal storage medium in solar distillation systems, but the low thermal conductivity of pure PCM remains a major challenge. To address this limitation, this study incorporates graphene carbon nanoparticles into beeswax-based PCM to enhance its thermal properties. This research examines the effect of adding 0.3% graphene to beeswax PCM on the performance of a tubular solar distillation system equipped with a Parabolic Trough Collector (PTC). The experiment compares the performance of pure PCM and nano-PCM, each weighing 90 grams and enclosed in an aluminum foil bag. The experimental results indicate that the addition of graphene to beeswax PCM improves solar distillation performance based on three key parameters, namely temperature, productivity, and efficiency. Nano-PCM achieved a maximum temperature of 76 °C, representing a 2.7% increase compared to pure PCM. In terms of productivity, the distilled water yield of nano-PCM was recorded at 0.834 L/m² on October 15, 2024, and 0.819 L/m² on October 17, 2024, marking an increase of 3.22% and 6.64%, respectively, compared to pure PCM. Furthermore, the system’s efficiency also improved with an increase of 3.03% on October 15, 2024, and 6.7% on October 17, 2024. Overall, this study demonstrates that the use of nano-PCM enhances the performance of solar distillation, particularly in terms of operating temperature, water productivity, and system efficiency. These findings highlight the significant potential of nano-PCM applications in large-scale solar distillation systems to improve freshwater production efficiency.

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Chen, K. N., and J. C. Arnold. "Wafer-Level Self-Aligned Nano Tubular Structures and Templates for Device Applications." Journal of Nanoscience and Nanotechnology 10, no. 12 (2010): 8145–50. http://dx.doi.org/10.1166/jnn.2010.2943.

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Mammen, Lena, Periklis Papadopoulos, Kathrin Friedemann, et al. "Transparent and airtight silica nano- and microchannels with uniform tubular cross-section." Soft Matter 9, no. 41 (2013): 9824. http://dx.doi.org/10.1039/c3sm51082d.

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Bervas, M., M. Perrin, S. Geniès, and F. Mattera. "Low-cost synthesis and utilization in mini-tubular electrodes of nano PbO2." Journal of Power Sources 173, no. 1 (2007): 570–77. http://dx.doi.org/10.1016/j.jpowsour.2007.04.077.

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Gialleli, Angelika-Ioanna, Michalis Kallis, Argyro Bekatorou, Maria Kanellaki, and Athanasios A. Koutinas. "Continuous Cold Pasteurisation of Contaminated Wine Using Nano- and Micro-Tubular Cellulose." Food and Bioprocess Technology 8, no. 3 (2014): 539–47. http://dx.doi.org/10.1007/s11947-014-1416-5.

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Tang, Jingyu, Luhan Bao, Xue Li, Lin Chen, and Feng F. Hong. "Potential of PVA-doped bacterial nano-cellulose tubular composites for artificial blood vessels." Journal of Materials Chemistry B 3, no. 43 (2015): 8537–47. http://dx.doi.org/10.1039/c5tb01144b.

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Introduction of PVA can improve the compliance of bacterial nano-cellulose hydrogel, which has been suggested as a promising biomaterial for artificial blood vessels especially for small-caliber vessels.

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Yoon, S. H., B. J. Kim, K. H. Lee, and D. G. Lee. "The Effect of Quartz Nano-Particles on the Damage Monitoring of Adhesive Joint at Cryogenic Temperature." Advanced Materials Research 93-94 (January 2010): 562–65. http://dx.doi.org/10.4028/www.scientific.net/amr.93-94.562.

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Recently, a piezoelectric method using piezoelectric characteristics of epoxy adhesives has been successfully developed for the adhesive joints, which can monitor continuously the damage of adhesively bonded structures without producing any defect induced by inserting a sensor. However, due to low piezoelectric properties of epoxy adhesives, the detection of micro crack was impossible. At the cryogenic temperature, the detection of micro crack is important to estimate the fatigue life because the polymeric adhesives become very brittle. Therefore, in this work, the epoxy adhesive was modified by quartz nano-particles which have much higher piezoelectric properties than the epoxy adhesives. To investigate the effects of quartz nano-particles, the static and dynamic tests of the tubular adhesive joints were performed to compare the joint strength and sensitivity of damage monitoring performance. From the experiment result, it was found that the quartz nano-particles not only improved the joint strength but also increased the sensitivity of damage monitoring performance at cryogenic temperature.

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Cheng, Xiu Wen, Hui Ling Liu, Qing Hua Chen, Jun Jing Li, and Xiu Juan Yu. "Preparation and Photoelectrocatalytic Performance of TiO₂ Nano-Tubes Arrays Electrode." Advanced Materials Research 661 (February 2013): 11–15. http://dx.doi.org/10.4028/www.scientific.net/amr.661.11.

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Highly ordered TiO2 nano-tubes arrays (TNTAs) electrode was fabricated through anodization. The effects of some experimental parameters on photocatalytic (PC) activity and photoelectrocatalytic (PEC) activity were investigated in detail. It was found that the optimum preparng conditions were as followed: the applied voltage, water content, fluoride concentration, anodization time and reaction temperature was 20 V, 40 vol%, 0.5 wt%, 2 h and 40 °C, respectively. In addition, the TNTAs electrode exhibited high PC and PEC activities, in which 39.1% and 65.7 % of methyl blue (MB) could be mineralized, respectively. The high PC and PEC activities could be attributed to the highly nano-tubular structure and mixed crystallite composition, which could facilitate the separation and transfer of the photogenerated charge carriers.

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Wei, Dai-Xiu, Yuichiro Koizumi, Huakang Bian, Yunping Li, and Akihiko Chiba. "Nano-lamellar/nano-tubular hierarchical porous structure produced by selective dissolution and anodization of lamellar Ti-40at.% Al alloy." Materials Letters 145 (April 2015): 15–18. http://dx.doi.org/10.1016/j.matlet.2014.11.059.

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Jalaluddin, Mohammad, Aaquib Hashmi, Konsam Bidya Devi, AlWaleed Abushanan, Qamar Hashem, and Uthman S. Uthman. "Assessment of the Efficacy of Different Desensitizing Agents on Dentinal Tubules Occlusion- An In vitro Study." Journal of Pharmacy and Bioallied Sciences 14, Suppl 1 (2022): S585—S588. http://dx.doi.org/10.4103/jpbs.jpbs_167_22.

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Aim: The aim of the current research was to evaluate the effectiveness of three desensitizing agents on the occlusion of dentinal tubules. Materials and Methods: Eighty human maxillary and mandibular permanent premolar teeth that were subjected to extraction in the course of orthodontic treatment were utilized in this study. The teeth were subjected to sectioning by employing a double-sided diamond disk. A block was procured from every even cervical dentinal surface with dimensions of 4 mm × 4 mm × 3 mm (L × B × H) by sectioning the tooth transversely. Further, 35% phosphoric acid was utilized for 30 s to cause dentinal etching, thereby exposing the dentinal tubules. The blocks of dentin were assigned at random to one of the following four groups (n = 20): group I: control, group II: bioactive glass containing desensitizing agent, group III: 1% nano-hydroxyapatite containing desensitizing agent, group IV: tri-calcium phosphate-containing desensitizing agent. The exterior of the specimens was scanned and evaluated using a scanning electron microscope. Results: 1% nano-hydroxyapatite-containing desensitizing agent (2.04 ± 0.08) exhibited higher mean dentinal tubular blockage, followed by the bioactive class-containing desensitizing substance (2.26 ± 0.19), tri-calcium phosphate desensitizing agent (2.84 ± 0.10), and the control group (4.18 ± 0.12) in that order. Amid the experimental groups employing the various desensitizing substances, there were significant differences statistically with P < 0.001. Conclusion: The current research concluded that each of the three desensitizing agents was efficient in dentinal tubular occlusion regardless of their different chemical constitution. However, it was noted that 1% nano-hydroxyapatite-containing desensitizing agent was marginally superior to the bioactive glass- and tri-calcium phosphate-containing desensitizing agents.

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Sharshir, Swellam W., Mohamed A. Hamada, A. W. Kandeal, et al. "Augmented performance of tubular solar still integrated with cost-effective nano-based mushrooms." Solar Energy 228 (November 2021): 27–37. http://dx.doi.org/10.1016/j.solener.2021.09.034.

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Piao, Zhonglie, Jijun Qiu, Yongqing Wu, et al. "Effects of the Nano-Tubular Anodic TiO2 Buffer Layer on Bioactive Hydroxyapatite Coating." Journal of Nanoscience and Nanotechnology 11, no. 1 (2011): 286–90. http://dx.doi.org/10.1166/jnn.2011.3270.

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Zhang, Ditai, Leixin Meng, Qi Xu, Suo Bai, Zhi Yang, and Yong Qin. "Electrospinning multi-layered nano-solenoid and reticular micro-tubular structure on a microfiber." Materials Letters 98 (May 2013): 153–56. http://dx.doi.org/10.1016/j.matlet.2013.02.011.

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Mi, Liwei, Hui Sun, Qi Ding, et al. "3D hierarchically patterned tubular NiSe with nano-/microstructures for Li ion battery design." Dalton Transactions 41, no. 40 (2012): 12595. http://dx.doi.org/10.1039/c2dt31787g.

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Gönüllü, Yakup, Guillermo César Mondragón Rodríguez, Bilge Saruhan, and Mustafa Ürgen. "Improvement of gas sensing performance of TiO2 towards NO2 by nano-tubular structuring." Sensors and Actuators B: Chemical 169 (July 2012): 151–60. http://dx.doi.org/10.1016/j.snb.2012.04.050.

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Yoon, Soon Ho, and Dai Gil Lee. "In situ Crack Propagation Monitoring in Tubular Adhesive Joints Containing Quartz Nano-particles." Journal of Adhesion Science and Technology 25, no. 16 (2011): 1973–85. http://dx.doi.org/10.1163/016942410x544776.

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Liu, Z., J. R. Clausen, R. R. Rao, and C. K. Aidun. "A unified analysis of nano-to-microscale particle dispersion in tubular blood flow." Physics of Fluids 31, no. 8 (2019): 081903. http://dx.doi.org/10.1063/1.5110604.

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Raja, K. S., M. Misra, and K. Paramguru. "Formation of self-ordered nano-tubular structure of anodic oxide layer on titanium." Electrochimica Acta 51, no. 1 (2005): 154–65. http://dx.doi.org/10.1016/j.electacta.2005.04.011.

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