نتایج جستجو برای: stoppers

تعداد نتایج: 306  

2017
Rahul Kumar Gupta Qiongfeng Shi Lokesh Dhakar Tao Wang Chun Huat Heng Chengkuo Lee

Over the years, several approaches have been devised to widen the operating bandwidth, but most of them can only be triggered at high accelerations. In this work, we investigate a broadband energy harvester based on combination of non-linear stiffening effect and multimodal energy harvesting to obtain high bandwidth over wide range of accelerations (0.1 g-2.0 g). In order to achieve broadband b...

Journal: :Physical review letters 2006
Wout Knoben N A M Besseling M A Cohen Stuart

This is the first report of experimental observations of depletion interactions in solutions of a (hydrogen-bonded) reversible supramolecular polymer. Depletion forces were measured directly by colloidal probe atomic force microscopy. The range of the depletion force is consistent with existing independent experimental data. The interaction can be tuned by adding monofunctional chain stoppers t...

Journal: :Chemical communications 2010
David Eisenberg Jennifer M Quimby Edward A Jackson Lawrence T Scott Roy Shenhar

The supramolecular dimerization of tetraanionic corannulene is utilized as a self-assembly motif for the construction of highly charged, buckybowl-based supramolecular oligomers. Oligomers of up to 7 units (3900 g mol(-1)) of reduced dicorannulenic monomers are identified and characterized by various NMR techniques, and the reversibility of their assembly is established through the concentratio...

2008
Tijs van der Storm

Failing integration builds are show stoppers. Development activity is stalled because developers have to wait with integrating new changes until the problem is fixed and a successful build has been run. We show how backtracking can be used to mitigate the impact of build failures in the context of component-based software development. This way, even in the face of failure, development may conti...

Journal: :Organic letters 2005
Ulla Létinois-Halbes David Hanss John M Beierle Jean-Paul Collin Jean-Pierre Sauvage

[reaction: see text] A new copper-complexed rotaxane is described. It consists of a two-coordination site ring threaded by a sterically non-hindering 2,2'-bipyridine derivative. An electrochemical signal (oxidation or reduction of the copper center, Cu(I) or Cu(II)) induces rearrangement of the system. By using long and flexible linkers between the stoppers and the central complex, ligand excha...

2010
Yun Hee Jang William A. Goddard

The essential components of the Stoddart-Heath-type [2]rotaxane molecular switch tunnel junction devices are the aromatic shuttle and stations, which are attached to other components, such as linkers, stoppers, and anchors. In this study, we explored a possibility of whether the molecular switch can be made simple by leaving only the π-stacked aromatic key components between two metal electrode...

Journal: :Food Packaging and Shelf Life 2022

The decision-making in the investment of a new line stoppers based on agglomerated cork requires knowledge composition and its contribution to performance. For this, it is necessary observe leading products market test series prototypes with different formulations. development manufacturing made by cork, such as bottle stoppers, benefits strongly from accurate chemical structural characterizati...

1997
David B. Amabilino Peter R. Ashton Vincenzo Balzani Christopher L. Brown Alberto Credi Jean M. J. Fréchet Jeffrey W. Leon Françisco M. Raymo Neil Spencer J. Fraser Stoddart Margherita Venturi

We have developed a synthetic approach to the self-assembly of [2]-, [3]-, and [4]rotaxanes, incorporating bis-p-phenylene-34-crown-10 as the ring component(s) surrounding bipyridinium-based dumbbell-shaped components bearing dendritic stoppers at both ends. As a result of the hydrophobic dendritic framework, these [n]rotaxanes are soluble in a wide range of organic solvents, despite the polyca...

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