نتایج جستجو برای: high yield process

تعداد نتایج: 3256089  

2004
Samuel Miller

A lthough an economic analysis will usually show that process-yield improvements and cycletime considerations have a far larger effect on the total cost of ownership, price is usually seen as the most important consideration when choosing an alignment system. Yet price should not be the single determining factor. True, system improvements to increase coupling yield are limited by prices that th...

Journal: :Molecules 2017
Jialei Su Feng Shen Mo Qiu Xinhua Qi

Agricultural waste cow dung was used as feedstock for the production of a high value-added chemical levulinic acid (LA) in dilute acid aqueous solutions. A high LA yield of 338.9 g/kg was obtained from the pretreated cow dung, which was much higher than that obtained from the crude cow dung (135 g/kg), mainly attributed to the breakage of the lignin fraction in the lignocellulose structure of t...

Journal: :international journal of advanced design and manufacturing technology 0
milad janbakhsh iran university of science and technology mohammad riahi iran university of science and technology faramarz djavanroodi iran university of science and technology

hydromechanical deep drawing (hdd) is one of the most convenient processes in which a sheet metal is drawn against a counter pressure rather than a rigid die in conventional stampings. this process has been increasingly used to produce aerospace and automotive components. more recently, aerospace industry is demanding new materials with capability to produce high strength to weight ratio produc...

2017
Adrian Hemmi Huanyao Cun Silvan Roth Jürg Osterwalder Thomas Greber

2015
Siobhan R Smith Charlene Fallan James E Taylor Ross McLennan David S B Daniels Louis C Morrill Alexandra M Z Slawin Andrew D Smith

A highly enantioselective Lewis base-catalysed formal [3+2] cycloaddition of ammonium enolates and oxaziridines to give stereodefined oxazolidin-4-ones in high yield is described. Employing an enantioenriched oxaziridine in this process leads to a matched/mis-matched effect with the isothiourea catalyst and allowed the synthesis of either syn- or anti-stereodefined oxazolidin-4-ones in high d.r...

2006
Christophe Giacomotto Nikola Nedovic Vojin G. Oklobdzija

In this paper we present the effect of process variations on the design of clocked storage elements. This work proposes to use the Energy-Delay space analysis for a true representation of the design trade-offs. Consequently, this work also shows a comparison of clocked storage elements under a specific set of system constraints for typical corner design and high yield corner design. Finally, we...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تحصیلات تکمیلی علوم پایه زنجان - دانشکده فیزیک 1392

in the first part of this thesis we explored wetting and its dynamics for small droplets. first, we showed how a simple feature of water droplets on a surface, i.e. laplace pressure, can be exploited to build a micropump. we investigated capillary pumping in microchannels both experimentally and numerically. putting two droplets of different sizes at the in/outlet of a microchannel, will ge...

2014
Simon M Nicolle Christopher J Moody

A new reagent for the oxidation of hydrazones to diazo compounds is described. N-Iodo p-toluenesulfonamide (TsNIK, iodamine-T) allows the preparation of α-diazoesters, α-diazoamides, α-diazoketones and α-diazophosphonates in good yield and in high purity after a simple extractive work-up. α-Diazoesters were also obtained in high yield from the corresponding ketones through a one-pot process of ...

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