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Journal articles on the topic 'Diamagnetic repulsion'

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Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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1

Tarn, Mark D., Noriyuki Hirota, Alexander Iles, and Nicole Pamme. "On-chip diamagnetic repulsion in continuous flow." Science and Technology of Advanced Materials 10, no. 1 (January 2009): 014611. http://dx.doi.org/10.1088/1468-6996/10/1/014611.

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2

YAMAMOTO, Kohei, Norio TAGAWA, and Hiroshi TANI. "1308 Study of Bearing using Diamagnetic Repulsion." Proceedings of Conference of Kansai Branch 2012.87 (2012): _13–8_. http://dx.doi.org/10.1299/jsmekansai.2012.87._13-8_.

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3

Jang, Bong Hwan, Seyong Kwon, and Joo H. Kang. "Measurement of the magnetic susceptibility of subtle paramagnetic solutions using the diamagnetic repulsion of polymer microparticles." Lab on a Chip 19, no. 14 (2019): 2356–61. http://dx.doi.org/10.1039/c9lc00245f.

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4

Pinot, Patrick, and Zaccaria Silvestri. "Pyrolytic carbon: applications of its diamagnetism in metrology." International Journal of Metrology and Quality Engineering 10 (2019): 7. http://dx.doi.org/10.1051/ijmqe/2019008.

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This paper presents some current or potential applications in metrology based on the diamagnetism of pyrolytic carbon (PyC). The magnetic repulsion force acting between a piece of PyC subjected to a magnetic flux can be used as magnetic spring either to control the position of the sensitive sensor element or to detect changes of a physical quantity to be measured. The first part of this paper provides examples briefly described of devices based on the diamagnetism of PyC for measuring mechanical quantities. There are two main configurations for magnetic levitation: one, used for measuring acceleration or inclination for instance, is based on the levitation of a PyC tile above a magnet or set of magnets; In the other, used to measure forces caused for example by contact or buoyancy, it is the permanent magnet that is levitated at a stable height above a fixed PyC tile. The second part describes current work at the Laboratoire Commun de Métrologie (LCM-LNE/CNAM) on the development of new laser power sensors using either diamagnetic force changes by photothermal excitation of electrons or diamagnetic torsion spring.

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5

Tarn, Mark D., Luke T. Elders, Sally A. Peyman, and Nicole Pamme. "Diamagnetic repulsion of particles for multilaminar flow assays." RSC Advances 5, no. 126 (2015): 103776–81. http://dx.doi.org/10.1039/c5ra21867e.

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6

Peyman, Sally A., Er Yee Kwan, Oliver Margarson, Alexander Iles, and Nicole Pamme. "Diamagnetic repulsion—A versatile tool for label-free particle handling in microfluidic devices." Journal of Chromatography A 1216, no. 52 (December 2009): 9055–62. http://dx.doi.org/10.1016/j.chroma.2009.06.039.

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7

Kwon, Seyong, Jieung Oh, Min Seok Lee, Eujin Um, Joonwoo Jeong, and Joo H. Kang. "Enhanced Diamagnetic Repulsion of Blood Cells Enables Versatile Plasma Separation for Biomarker Analysis in Blood." Small 17, no. 23 (May 12, 2021): 2100797. http://dx.doi.org/10.1002/smll.202100797.

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8

Holík, Miroslav, and Božena Matějková. "Transmission of substituent effects in N-(p-substituted phenyl)-phthalimides." Collection of Czechoslovak Chemical Communications 55, no. 1 (1990): 261–72. http://dx.doi.org/10.1135/cccc19900261.

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Chemical shifts of benzene part of the title compounds have been correlated with substituent chemical shifts (SCS) increments a for 1H and z for 13C NMR spectra. These correlations gave pieces of information not only about the through-conjugation of substituents but also about the change of the twist about the central N-C bond with the change of substituent in the para-position. In such a way the electronic effects of substituents have been studied together with the effects due to conformational changes which manifest themselves with the change in the van der Waals repulsion and/or diamagnetic anisotropy of double bond. Chemical shifts in phthalimide part of molecule have been related to the electronic effect of distant substituent after separation of the main source of variation from random error by principal component analysis.

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9

Rodríguez-Villarreal, Angeles Ivón, Mark D. Tarn, Leigh A. Madden, Julia B. Lutz, John Greenman, Josep Samitier, and Nicole Pamme. "Flow focussing of particles and cells based on their intrinsic properties using a simple diamagnetic repulsion setup." Lab Chip 11, no. 7 (2011): 1240–48. http://dx.doi.org/10.1039/c0lc00464b.

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10

Kwon, Seyong, Jieung Oh, Min Seok Lee, Eujin Um, Joonwoo Jeong, and Joo H. Kang. "Blood Plasma Separation: Enhanced Diamagnetic Repulsion of Blood Cells Enables Versatile Plasma Separation for Biomarker Analysis in Blood (Small 23/2021)." Small 17, no. 23 (June 2021): 2170116. http://dx.doi.org/10.1002/smll.202170116.

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11

Matsuyama, Yukinori, Takashi Yasuoka, Syunmei Mitsuzawa, and Tunetaka Sasaki. "Observation of magnetic repulsion acting on a nitrogen bubble on a water surface: A simple experiment studying diamagnetic property of nitrogen." Journal of Chemical Education 74, no. 8 (August 1997): 943. http://dx.doi.org/10.1021/ed074p943.1.

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12

Perdana, Dony, Lilis Yuliati, Nurkholis Hamidi, and I. N. G. Wardana. "The Role of Magnetic Field Orientation in Vegetable Oil Premixed Combustion." Journal of Combustion 2020 (January 28, 2020): 1–11. http://dx.doi.org/10.1155/2020/2145353.

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This study observed the influence of magnetic field orientation on the premixed combustion of vegetable oil. The results show that the magnetic field increased the laminar burning velocity because the spin of electron became more energetic and changes the spin of hydrogen proton from para to ortho. The increase of flame speed became larger on vegetable oil with stronger electric poles. The attraction magnetic field gives the strongest effect against the increase of flame speed and makes flame stability limit wider toward lean equivalence ratio. This is because O2 with the paramagnetic nature is pumped more crossing flame from the south pole (S) to north pole (N) whereas the heat energy carried by H2O from the reaction product with the diamagnetic nature is pumped more crossing flame in the N pole to the S pole. This made the combustion close to Lewis number equal to unity, whereas in the repulsion magnetic poles, S-S, more O2 is pumped into the flame while more heat is pumped out of the flame, and thus, combustion in the flame is leaner and reactions are not optimal. Conversely, at N-N poles, more heat carried by H2O was pumped into the flame while more O2 was pumped out of the flame. As a result, combustion in the flame is richer and the reaction is also not optimal. As a consequence, the velocity of the laminar flame at the repelling poles is lower than that of attracting poles.

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13

Carnovali, Marta, Noemi Stefanetti, Alessandro Galluzzo, Pietro Romeo, Massimo Mariotti, and Valerio Sansone. "High-Intensity Low Frequency Pulsed Electromagnetic Fields Treatment Stimulates Fin Regeneration in Adult Zebrafish—A Preliminary Report." Applied Sciences 12, no. 15 (August 2, 2022): 7768. http://dx.doi.org/10.3390/app12157768.

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Low-Intensity electromagnetic fields (LI-PEMFs) are known to induce a trophic stimulus on bone tissue and therefore have been largely used for the treatment of several musculoskeletal disorders. High intensity (HI) PEMFs add interesting features to bio-stimulation such as electroporation, a phenomenon characterized by transient increased cell permeabilization to molecules, and diamagnetism, a water-repulsive effect based on the diamagnetic properties of water and transmembrane ions gradients. Despite the rapid evolution of technology, the biological mechanisms underlying it are still poorly understood. In order to evaluate the effectiveness of this particular stimulation, HI LF-PEMFs were used to stimulate the caudal fin rays of adult zebrafish. Actually, the zebrafish fin regeneration is a simple, well understood, and widely adopted model for studying bone regeneration. A controlled amputation fin experiment was then conducted. Regenerated bone matrix of fin rays was dyed with calcein and then analysed under fluorescence microscopy. Both the length and the area of regenerated fin’s rays treated with HI LF-PEMFs resulted significantly increased when compared with non-treated.

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14

TANI, Hiroshi, Shinji KOGANEZAWA, and Norio TAGAWA. "S1620201 Reduction of Outgas from Pivot Bearing by Diamagnetic Repulsive Force." Proceedings of Mechanical Engineering Congress, Japan 2014 (2014): _S1620201——_S1620201—. http://dx.doi.org/10.1299/jsmemecj.2014._s1620201-.

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15

Sutoko, Sutoko. "SISTEM KENDALI LEVITASI MAGNETIK REPULSIF MENGGUNAKAN METODE PROPORTIONAL-INTEGRAL-DERIVATIVE (PID)." Jurnal Teknologi Terapan: G-Tech 4, no. 2 (April 30, 2021): 334–39. http://dx.doi.org/10.33379/gtech.v4i2.634.

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Sifat dasar kemagnetan membuat teknik levitasi menjadi dimungkinkan, namun terdapat perbedaan mendasar jika dibandingkan dengan sifat kelistrikan. Pada interaksi antar muatan listrik, diketahui bahwa muatan yang sama akan saling menolak, sementara muatan yang berlawanan akan saling menarik. Karena adanya muatan listrik bersih, maka levitasi elektris bisa dimungkinkan. Pada interaksi magnetis dimungkinkan melakukan levitasi dengan lebih mudah melalui modifikasi medan magnet. Modifikasi ini bisa dilakukan melalui sistem kendali dan perangkat elektromagnet, seperti induktor. Tanpa sistem kendali, levitasi magnetis hanya bisa dilakukan menggunakan bahan diamagnetis. Saat ini bahan diamagnetis yang memiliki efek paling besar adalah superkonduktor. Selain mahal, temperatur superkonduktor harus dibuat sangat rendah sehingga tidak praktis dipakai dalam teknik levitasi. Pada penelitian ini akan dikembangkan sebuah teknik levitasi magnetis yang bersifat repulsif menggunakan sistem kendali proportional-integral-derivative (PID). Sistem yang dikendalikan berupa kekuatan efektif elektromagnet dalam menstabilkan objek yang ditolak oleh kutub magnet permanen sehingga tetap berada pada posisi dan orientasi yang sama. Hasil yang telah didapatkan adalah proses levitasi magnetik repulsif berhasil secara optimum mempertahankan objek magnet neodimium dengan ketinggian 4 mm selama 5 detik menggunakan nilai Kp sebesar 1 dan nilai Kd sebesar 1,5.

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16

Essén, H. "Classical diamagnetism, magnetic interaction energies, and repulsive forces in magnetized plasmas." EPL (Europhysics Letters) 94, no. 4 (May 1, 2011): 47003. http://dx.doi.org/10.1209/0295-5075/94/47003.

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17

Hu, Chia-Ren. "Qualitative Picture of a New Mechanism for High-Tc Superconductors." International Journal of Modern Physics B 17, no. 18n20 (August 10, 2003): 3284–92. http://dx.doi.org/10.1142/s0217979203020879.

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Xu et al. observed enhanced Nernst effect and Iguchi et al. observed patched diamagnetism, both well above Tc in underdoped high-Tc superconductors (HTSCs). A new mechanism is proposed here, which seems to naturally explain, at least qualitatively, these observations, as well as the d-wave nature and continuity of pseudogap and pairing gap, the tunneling conductance above Tc, as well as T*(x), Tν(x), Tc(x), etc. This mechanism combines features of dynamic charged stripes, preformed pairs, and spin-bags: At appropriete doping levels, the doped holes (and perhaps also electrons) will promote the formation of anti-phase islands in short-range anti-ferromagnetic order. On the boundary of each such island reside two doped carriers; the unscreened Coulomb repulsion between them stabilizes the island's size. Superconductivity results when such "pre-formed pairs" Bose-condense.

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18

Perdana, Dony, Satworo Adiwidodo, Mochamad Choifin, and Wigo Ardi Winarko. "The effect of magnetic field variations in a mixture of coconut oil and jatropha on flame stability and characteristics on the premixed combustion." EUREKA: Physics and Engineering, no. 5 (September 13, 2021): 13–22. http://dx.doi.org/10.21303/2461-4262.2021.001996.

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This study investigates the effect of attracting and repels magnetic fields with the materials of vegetable oil in the form of a mixture of coconut oil and jatropha (B50) against the behavior of stability and characteristics of flame in the process of premixed burning. The fuel for a mixture of vegetable oil of 600 ml was filled into the boiler heated with a gas stove to be evaporated at a temperature of 300 °C and 3 bar pressure was kept constant was mixed with air from the compressor in the burner room. Then a flame was ignited at the end of the nozzle to form a diffusion flame, the flame formed was then given north (N) and south (S). The results showed that the flame speed of the attractive magnetic field was 52.22 cm/sec, the repulsive magnetic field was 50.49 cm/sec while without a magnetic field was 49.79 cm/sec. The increase in the laminar flame speed in the attractive magnetic field is caused by the electron spin becoming more energetic and due to the change in the spin of the hydrogen proton from para to ortho. The attractive magnetic field has the strongest effect on increasing the flame speed. This makes the flame more stable in the equivalency ratio range of 0.75–1.17 compared to without a magnetic field in the same equivalency ratio range. This was so because O2 where it is in nature of paramagnetic was pumped more crossing the flame from south to north poles whereas the heat brought by H2O in nature of diamagnetic was pumped more crossing north to south poles. Whereas on the repel magnetic field, it was hotter when brought by H2O pumped into the flame whereas O2 tended to be pumped going out of the flame. This caused the combustion in the flame was smaller and the reaction was not maximum. As a consequence, the laminar flame speed was more lacking and the reaction was not to the fullest. As a consequence, the laminar flame speed in the repel was fewer than the attract magnetic field

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19

Soebiyakto, Gatot, I. N. G. Wardana, Nurkholis Hamidi, and Lilis Yuliati. "Premixed Combustion of Vegetable Oil in a Cylinder with 4 Magnetic Poles." Journal of Southwest Jiaotong University 55, no. 3 (2020). http://dx.doi.org/10.35741/issn.0258-2724.55.3.48.

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This article describes a new method/idea in vegetable oil combustion based on stoichiometry, enabling vegetable oil vapor to burn in premixed combustion more effectively. Using the circular magnetic field from four north and south poles with a magnitude of 3 Tesla to surround the cylindrical combustor, the flaming vegetable oil vapor was captured and recorded as still pictures. Based on the flame pattern in these pictures, analysis has been conducted. The authors determined that the magnetic field accelerated the rate of premixed combustion reactions because the spin of electrons and the spin of hydrogen protons became more energetic. Magnetic fields also controlled the propagation of flame through the mobility of electrons in vegetable oil molecules and through the paramagnetic properties of oxygen and the diamagnetic properties of H2O, which carried heat to the product. Short-chain saturated fatty acid flame is highly reactive because of its high polarity, but its combustion reaction is less affected by magnetic fields because of its low electron mobility. Conversely, long-chain fatty acid flame is less reactive because of its low polarity, but its combustion reaction is strengthened by the magnetic field because of its higher electron mobility. The magnetic field in the transition field of the north and south poles had the strongest accelerating influence on flame propagation and the reaction rate via attraction of paramagnetic O2 and repulsion of diamagnetic H2O across the flame.

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20

Summers, Jill, Tony Wright, Heather Benson, Penny Moss, George Tsadilas, Jeff Edwards, and Rob Will. "P128 Double-blind randomized pilot study to evaluate diamagnetically enhanced transdermal ibuprofen in comparison to placebo on pain and function in individuals with knee osteoarthritis." Rheumatology 61, Supplement_1 (April 23, 2022). http://dx.doi.org/10.1093/rheumatology/keac133.127.

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Abstract Background/Aims Treatment of knee osteoarthritis (OA) focuses on reducing pain and improving function. Transdermal NSAID formulations have been developed as an alternative approach to reduce pain and sensitisation around the OA affected joint whilst avoiding some of the risks associated with oral NSAID administration. The aim of the study was to evaluate clinical outcomes following short-term (48 hours) administration of transdermal ibuprofen (5% w/v) from a wearable patch that incorporated a patented diamagnetic repulsion technology to enhance drug delivery, in comparison to placebo. Methods Double-blind, repeated measures, crossover design. Two study periods (48 hr each); diamagnetically enhanced ibuprofen or placebo, randomised. Participants: 24 (6 male: 18 female, mean age 66) people with painful knee OA. Patch applications: 6 x 4-5 hour patch applications over a 48 hour period. Active patches contained 5% ibuprofen in a gel reservoir with magnetized backing. Placebo patches had identical appearance but no ibuprofen and non-magnetized backing. Primary outcome measures: VAS for pain on movement (STS X3), WOMAC pain score, WOMAC function score. Results: Conclusion The active device containing ibuprofen (5%) and magnetophoresis technology produced a significantly greater reduction in pain and improvement in function than the placebo device. This was particularly the case for movement related pain. The reduction in pain was apparent with both VAS pain ratings and WOMAC pain score. There was also a clear improvement in function based on the WOMAC function score. The number needed to treat (NNT) for a 50% reduction in movement related pain was 2.2 and for resting pain 3.4. There were no major adverse events recorded during the study. Disclosure J. Summers: None. T. Wright: None. H. Benson: None. P. Moss: None. G. Tsadilas: None. J. Edwards: None. R. Will: None.

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21

Inui, Norio, and Kazunori Maebuchi. "Dynamic and ﬂuctuation properties of a graphene disk levitated by a diamagnetic force in air." Journal of Physics D: Applied Physics, April 19, 2022. http://dx.doi.org/10.1088/1361-6463/ac683c.

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Abstract A graphene disk can be levitated above a magnet by a repulsive force arising from their diamagnetic interaction if the product of the magnetic field and its gradient is sufficiently large. The diamagnetic force also causes the rotation of the graphene disk because of the strong anisotropy of the magnetic permeability of graphene; thus a motion of centroid and rotation are considered by solving simultaneous Langevin equations. Furthermore, the dependence of a fluctuations of the position and angle of the levitated graphene disk on the size and temperature is also explained.

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22

"FT-IR, Molecular Structure and Nonlinear Optical Properties of 2-(pyranoquinolin-4-yl)malononitrile (PQMN): A DFT Approach." Biointerface Research in Applied Chemistry 11, no. 5 (February 15, 2021): 13729–39. http://dx.doi.org/10.33263/briac115.1372913739.

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A combined experimental and theoretical study for Fourier transform infrared spectra for 2-(pyranoquinolin-4-yl)malononitrile (PQMN) compound has been made. In advance, we investigate many physical characteristics based on DFT/B3LYP using 6-311G(d,p) basis set such as optimum structure, vibrational frequencies, thermo-chemistry, overall dipole moment, HOMO/LUMO Bandgap, nuclear repulsive energy and ionization energies, electronic affinity and chemical potential, global electrophilicity index, global hardness and finally softness (ζ). Also, we studied the non-linear optical (NLO) properties of PQMN. Results emphasize both degeneracy and diamagnetic properties of PQMN. PQMN Frontiers’ molecular orbitals (FMOs) split into two distinguished alpha (spin ↑) and beta (spin ↓) states with the same energy 3.7 eV, although its singlet spins state. Moreover, the calculated dipole moment (DM) value (13.3 Debye) for PQMN explains the mystery behind its reactive tendency with the nearby media. PQMN is a unique model for a degenerate diamagnetic semiconductor that can be easily used for optoelectronic manufactured devices such as solar cells and spintronic devices.

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