Results 131 to 140 of about 5,106 (185)
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A novel aureothin diepoxide derivative from Streptomyces sp. NIIST-D31 strain
The Journal of Antibiotics, 2022A novel vicinal diepoxide of alloaureothin was isolated from Streptomyces sp. NIIST-D31 strain along with three carboxamides, p-aminobenzoic acid and 1,6-dimethoxyphenazine. Exhaustive 2D NMR analysis and analysis of experimental, theoretical CD spectra aided in establishing the structure of compound 1. Compound 1 inhibits adipogenesis and accumulation
Thankappan Drissya +9 more
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Temperature behavior of the complex piezoelectric d31 coefficient in modified lead titanate ceramics
Materials Letters, 1986Piezoelectric properties of modified lead titanate ceramics were investigated in an effort to explain the large electromechanical anisotropy observed in these materials. While the thickness coupling factor is approximately constant with temperature, the planar coupling factor becomes zero near room temperature, probably indicating a change in sign of ...
Damjanovic, D. +3 more
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Ferroelectrics, 1986
Values are reported for the piezoelectric coefficients d31 and d3h, of highly oriented one-way drawn polyvinylidene fluoride. Samples were compared with high Form I content following two preparation procedures, one giving material of low Young's modulus by drawing to a conventional draw ratio and the other of high Young's modulus by drawing to a very ...
J. Humphreys +3 more
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Values are reported for the piezoelectric coefficients d31 and d3h, of highly oriented one-way drawn polyvinylidene fluoride. Samples were compared with high Form I content following two preparation procedures, one giving material of low Young's modulus by drawing to a conventional draw ratio and the other of high Young's modulus by drawing to a very ...
J. Humphreys +3 more
exaly +2 more sources
Zaštita od buke cestovnog prometa na dionici ceste D31 - spoj D31 na D30 i na D408
2010Za dionicu ceste D31 – spoj na D30 i na D408 izrađen je idejni projekt zaštite od buke. Izrađen je 3D modela prostora za navedenu dionicu. Primjenom računalnog programa LIMA koristeći njemačku i francusku metodu proračuna određene su razine buke. Predviđena vrsta zaštite su zidovi za zaštitu od buke za koje je izvršena optimizaciju njihovih visina i ...
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Simulations, fabrication, and characterization of d31 mode piezoelectric vibration energy harvester
Microsystem Technologies, 2019This paper presents the development work on d31 mode piezoelectric vibration energy harvester. The device structure consists of a fixed-free type cantilever beam with a seismic mass attached at the free end of the beam. On top of the cantilever beam, a ZnO piezoelectric layer is sandwiched between two metal electrodes.
Renu Singh, B. D. Pant, Ankush Jain
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Low frequency PVDF piezoelectric energy harvester with combined d31 and d33 operating modes
The 8th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems, 2013This paper reports the design, test and application of a novel low frequency piezoelectric energy harvester. To achieve high output voltage at low frequency, both d31 and d33 modes of polyvinylidene fluoride (PVDF) are utilized in this device. Output voltage of the device are tested under different frequencies and accelerations.
Mengdi Han +4 more
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Current Applied Physics, 2011
Abstract We report fabrication by a traditional ceramics process of a dome-like actuator composed of two PZT piezoelectric ceramics, one doped with donors (La 3+ and Nb 5+ ) and the other with acceptors (Fe 3+ and Ni 2+ ). The results show that at 120 °C, the resistivity of PZT doped with La 3+ and Nb 5+ is three orders of magnitude more than ...
Haiyan Chen, Chunhua Fan, Zhongyan Meng
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Abstract We report fabrication by a traditional ceramics process of a dome-like actuator composed of two PZT piezoelectric ceramics, one doped with donors (La 3+ and Nb 5+ ) and the other with acceptors (Fe 3+ and Ni 2+ ). The results show that at 120 °C, the resistivity of PZT doped with La 3+ and Nb 5+ is three orders of magnitude more than ...
Haiyan Chen, Chunhua Fan, Zhongyan Meng
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The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements. They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements. They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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Journal of Applied Physics, 1999
The wafer flexure technique was used to characterize the d31 coefficient of a number of sol–gel and radio frequency (rf) sputtered lead zirconate titanate (PZT) thin films with thicknesses between 0.6 and 3 μm. Typical d31 values for well-poled 52/48 sol–gel films were found to be between −50 and −60 pC/N.
Joseph F. Shepard +3 more
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The wafer flexure technique was used to characterize the d31 coefficient of a number of sol–gel and radio frequency (rf) sputtered lead zirconate titanate (PZT) thin films with thicknesses between 0.6 and 3 μm. Typical d31 values for well-poled 52/48 sol–gel films were found to be between −50 and −60 pC/N.
Joseph F. Shepard +3 more
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