نتایج جستجو برای: axle

تعداد نتایج: 1414  

2015
Giulio Ragazzon Massimo Baroncini Serena Silvi Margherita Venturi Alberto Credi

The realization of artificial molecular motors capable of converting energy into mechanical work is a fascinating challenge of nanotechnology and requires reactive systems that can operate away from chemical equilibrium. This article describes the design and construction of a simple, supramolecular ensemble in which light irradiation causes the directional transit of a macrocycle along a nonsym...

Kazemi, Saeedi,

In this study, stability control of a three-wheeled vehicle with two wheels on the front axle, a three-wheeled vehicle with two wheels on the rear axle, and a standard four-wheeled vehicle are compared. For vehicle dynamics control systems, the direct yaw moment control is considered as a suitable way of controlling the lateral motion of a vehicle during a severe driving maneuver. In accorda...

Journal: :Organic letters 2006
Jean-François Morin Yasuhiro Shirai James M Tour

[structure: see text] With the eventual goal of demonstrating a motorized nanocar, the key structure has been synthesized which bears a light-activated unidirectional molecular motor and an oligo(phenylene ethynylene) chassis and axle system with four carboranes to serve as the wheels. Kinetics studies in solution show that the motor indeed rotates upon irradiation with 365 nm light, and the fu...

Journal: :Molecules 2016
Lucas A Powers David B Smithrud

Rotaxanes are unique mechanical devices that hold great promise as sensors. We report on two new rotaxanes that contain an acid or base sensitive trigger and readily disassemble in a wide range of environments. Disassemblage was observed under TLC and ¹H-NMR analysis. The axle is highly charged, which enhances solubility in aqueous environments, and can be readily derivatized with sensor compon...

Journal: :Organic & biomolecular chemistry 2012
Graeme T Spence Nicholas G White Paul D Beer

The effect of varying the size of the macrocycle component on the formation of anion templated imidazolium interpenetrated assemblies is investigated. Two different approaches to reducing the macrocycle size are undertaken and the stabilities of the resulting pseudorotaxanes incorporating substituted imidazolium threading components studied using (1)H NMR spectroscopy. Novel imidazolium axle co...

Journal: :The Journal of chemical physics 2007
Yu Liu Chun-Ju Li Heng-Yi Zhang Li-Hua Wang Qian Luo Ge Wang

In a three-component system containing dibenzo-24-crown-8 (1), diamino-dibenzo-24-crown-8 (2), and 1,2-bis(4,4(')-dipyridyl)ethane (3(2+)), axle 3(2+) can shuttle between wheels 1 and 2 by acid-base control, accompanying color changes from yellow to red. This system could not only be taken as a chromophoric supramolecular switch, but also exhibit a function as INHIBIT logic gate.

Journal: :The British journal of ophthalmology 1988
E S Perkins

The sagittal distance of ocular structures can be obtained with a slit-lamp microscope providing the movement of the slit-lamp can be measured. A simple device consisting of a pointer attached by a spring clip to the axle of a Haag-Streit 900 slit-lamp is described. The pointer rides over a scale which slides with the slit-lamp. Comparisons of anterior chamber depth and lens thickness showed a ...

Journal: :Annali italiani di chirurgia 2003
N Picardi

Simulated test of effectiveness of the original tool grasping tie, technically already illustrated in two previous papers listed in bibliography, for fixing a spongy rubber tube, simulating a rectal stump on the anvil's axle of a circular stapler, by tightening over it a nylon ribbon slip-knot (the tie). After connecting the anvil to the stapler head through an other spongy rubber tube simulati...

2012
Wayne Ellwood

Looking at the history of Corvette suspension systems, we see an evolution from solid axle cars to the trailing arm design (IRS) of C2 and C3. Then, in 1984, there was a switch to the five-link design that marked the modern Corvette. But it took a long time for GM to upgrade from the C3 to C4 IRS systems. Given the problems with the C2 and C3 trailing arm IRS, it was inevitable that racers and ...

2014
Vijay Patel Nilesh Ghetiya Jatin Dave Sandip Shah

In the 21st century, Manufacturers will increasingly face frequent and unpredictable market changes. These changes include the frequent introduction of new products, increased demand for new products and new process technologies. To produce variety of product and suit to new processes automated/semi automated machine tools and fixture are required. In this paper present a fixture design for aut...

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