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241
Preparative and N.M.R. studies of polyphosphorus ligands and their complexes
Published 1992“…When all three phosphorus atoms are coordinated to the same metal atom this leads to considerable ring strain, but nonetheless such complexes are stable, but show interesting variations in their n.m.r. properties. …”
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Thesis -
242
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243
Synthesis and characterisation of novel α-functionalised phosphoryl derivatives
Published 2001“…A novel N-functionalised macrocycle ring that includes four pendant methylenephosphonates with embedded pyridine has been successfully prepared. …”
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Thesis -
244
2 - Epi-3,6-dithio-2,5-diketopiperazines (ETPs): an overview of synthetic approaches to the ETP core
Published 2021“…Herein, we describe different examples and synthetic approaches attempted to obtain the ETP core structure, characterised by a diketopiperazine ring bridged by two (or more) sulfur atoms at the three and six positions.…”
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245
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246
On the puncture strength of rubber
Published 1987“…It has been observed that a ring crack forms on the rubber surface before puncture occurs. …”
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Thesis -
247
Planar antennas with enhanced bandwidth and radiation characteristics
Published 2017“…In this chapter, novel wideband and ultra-wideband (UWB) antennas that are based on loading the background plane of a monopole radiator with concentric split-ring resonators are presented. It is shown that this modification improves the fractional bandwidth of the antenna from 41 to 87%; in particular, the operational bandwidth of the proposed antennas is double that of a conventional monopole antenna of the same size.…”
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Book Section -
248
Crystal Structure of gamma-Oxapentamidine complexed with d(CGCGAATTCGCG)2. the effects of drug structural change on DNA minor-groove recognition
Published 1994“…The amidinium groups of the ligand do not hydrogen bond to bases, but are in close contact with 04' sugar ring atoms. This in part explains the reduced DNA binding affinity of this ligand compared to pentamidine.…”
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249
Mutual coupling reduction in dielectric resonator antennas using metasurface shield for 60 GHz MIMO systems
Published 2016“…The metasurface comprises an array of unique split-ring resonator (SRR) cells that are integrated along the E-plane. …”
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250
High selectivity microwave bandpass filter with a wide upper stopband
Published 2020“…The filter initially proposed consists of electromagnetically coupled C-shaped open-ring resonators whose feedlines are loaded with inductive spiral shaped open-circuited stubs that are strategically located along the feedlines in order to introduce transmission zeros in the filter’s stopband response. …”
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251
An activity-based integrated land-use transport model for urban spatial distribution simulation
Published 2019“…However, there is also significant population density increase along the 6th ring road, indicating the relocation trend of the residents and businesses to the outskirts. …”
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252
De Novo nucleic acids: a review of synthetic alternatives to DNA and RNA that could act as bio-information storage molecules
Published 2020“…But just what is it about their structures; an aromatic heterocyclic base appended to a (five-atom ring) sugar-phosphate backbone that enables them to carry out these functions with such high fidelity? …”
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253
A microstrip quasi-elliptic bandpass filter implemented using stub loaded resonators
Published 2021“…A highly selective microstrip bandpass filter consists of electromagnetically coupled U-shaped open ring resonators is presented in this paper. The resonators are directly loaded with open-circuited inductive stubs and the feed-lines are interdigital coupled to the resonators. …”
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254
Investigation and development of a novel metrology standard for the measurement of relative intensity noise and frequency chirp of DFB lasers in optical networks
Published 2007“…This is enforced further by the nonplanar ring oscillator (NPRO) technology providing superior line width stability. …”
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Thesis -
255
Semi fractal three leaf clover-shaped CPW antenna for triple band operation
Published 2014“…The realization of the triband antenna was achieved by using two semi fractal ring patches resembling the shape of a three leaf clover, and by introducing a pair of symmetrical L-shaped slits in its ground plane. …”
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256
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257
In search of a new class of stable nitroxide: synthesis and reactivity of a peri-substituted N,N-bissulfonylhydroxylamine
Published 2011“…In an approach to stabilising a bissulfonylnitroxide radical, the cyclic, peri-substituted N,N-bissulfonylhydroxylamine, 2-hydroxynaphtho[1,8-de][1,3,2]dithiazine 1,1,3,3-tetraoxide (1), has been prepared by formal nitrogen insertion into the sulfur–sulfur bond of a sulfinylsulfone, naphtho[1,8-cd][1,2]dithiole 1,1,2-trioxide. The heterocyclic ring of 1 is shown to adopt a sofa conformation by X-ray crystallography, with a pseudo-axial hydroxyl group. …”
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258
Wideband printed monopole antenna for application in wireless communication systems
Published 2018“…The impedance bandwidth of the antenna is enhanced with the inclusion of meander-line slots in the patch and four double split-ring resonators on the underside of the radiating patches. …”
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259
Interaction suppression technique for high-density antenna arrays for mm-wave 5G MIMO systems
Published 2021“…High isolation between adjacent radiation elements was achieved by embedding a crisscrossed decoupling structure comprising slotted microstrip-lines and locating in the ground-plane under each slot a dielectric ring. The proposed periodic array behaves as artificial magnetic conductor (AMC) surfaces as incident waves in the substrate are fully reflected with a near zero degrees reflection phase. …”
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260
High-gain end-fire bow-tie antenna using artificial dielectric layers
Published 2015“…By loading the antenna with a 2 × 5 array of enhanced end-coupled split-ring (EECSR) unit-cells results in significant enhancement in the antenna gain performance. …”
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Article