نتایج جستجو برای: واکنش henry

تعداد نتایج: 36345  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1390

چکیده در این پایان نامه، به خاطرکاربرد سنتزی بتا نیتروالکلهای حاصل ازواکنش henry، که در آن گروه های عاملی نیترو وهیدروکسی قابلیت تبدیل به گروههای عاملی مطلوب مانند کربونیل، آمینو و یا جایگزینی توسط نوکلئوفایلهای مورد نظر رادارد، ما تصمیم به تولید این ترکیبات با استفاده از سوپر-باز آلی متفرمین ، به سه صورت مختلف در محیط، کردیم:1- متفرمین به صورت هموژن در محیط، نانو کاتالیستهای:2- sba-15متفرمین ...

H. Ghasemzadeh, Z. Jamshidzadeh,

Abstract:   A two-dimensional fully implicit finite difference model, which can be easily extended to three dimensions, is developed to study the effect of cut-off walls on saltwater intrusion into the aquifers. This model consists of a coupled system of two nonlinear partial differential equations which describe unsteady density-driven groundwater flow and solute transport. The numerica...

The C-C bond formation is an important reaction in organic synthesis to obtain value-added intermediates. Therefore, in this paper an attempt has been made to accelerate the Henry reaction (C-C bond formation) between aryl aldehydes and nitromethane using less expensive whole cell biocatalyst, baker’s yeast (BY). The scope of the methodology was also tested for the heteryl aldehyde i.e. 2-chlor...

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This article introduces the educational approach is based on critical theory. This study has sought to rely on the views of Paulo Freire and Henry Giroux and artistic elements and components of curriculum, teaching - learning extraction, analyzed, and compared to. In this paper we critically examine and compare the philosophical foundations of education, educational goals, method of education, ...

2016

at the age of 68, belonged to a family of surgeons. He was educated at the Bristol Royal Infirmary and Medical School, and very soon after qualifying he settled at Westbury. Although his capacity for work was immense, yet in the early years of his practice he had more than one attack of haemoptysis, and it was his opinion that leading a country open-air life had been the means of warding off mo...

Journal: :Medical History 1996
Ghislaine Lawrence

fo'c'sle-study running his naval household with the aid of an Admiralty of natural history suppliers and breeders, as well as experts like Lyell, Hooker and the young Huxley in every port. Beatrice Webb once likened Herbert Spencer to a spider collecting facts on the theoretical web he was spinning; the image equally well suits Darwin. A pleasure to read, this exciting new biography deepens our...

2017
Mary Musgrove Rachel M Kenney Ronald Kendall Robert Tibbetts Linoj Samuel Mike Peters Susan Davis

959. Communicating Microbiology Results. It’s Not Just What You Say, But How You Say It Mary Musgrove, PharmD; Rachel M Kenney, PharmD; Ronald Kendall, PharmD; Robert Tibbetts, PhD D(ABMM), F(CCM); Linoj Samuel, PhD., D(ABMM); Mike Peters, PharmD, BCPS; Susan Davis, PharmD; Pharmacy, Henry Ford Hospital, Detroit, Michigan; Henry Ford Hospital, Detroit, Michigan; Henry Ford Wyandotte Hospital, W...

2017
Rebekah W Moehring Xinru Ren Deverick J Anderson Angelina Davis April Dyer Yuliya Lokhnygina Lauri Hicks Arjun Srinivasan Elizabeth Dodds Ashley

959. Communicating Microbiology Results. It’s Not Just What You Say, But How You Say It Mary Musgrove, PharmD; Rachel M Kenney, PharmD; Ronald Kendall, PharmD; Robert Tibbetts, PhD D(ABMM), F(CCM); Linoj Samuel, PhD., D(ABMM); Mike Peters, PharmD, BCPS; Susan Davis, PharmD; Pharmacy, Henry Ford Hospital, Detroit, Michigan; Henry Ford Hospital, Detroit, Michigan; Henry Ford Wyandotte Hospital, W...

The C-C bond formation is an important reaction in organic synthesis to obtain value-added intermediates. Therefore, in this paper an attempt has been made to accelerate the Henry reaction (C-C bond formation) between aryl aldehydes and nitromethane using less expensive whole cell biocatalyst, baker’s yeast (BY). The scope of the methodology was also tested for the heteryl aldehyde i.e. 2-chlor...

Journal: :iranian journal of catalysis 2015
leila youseftabar-miri maryam rafieirad

the ionic liquid, n,n,n,n-tetramethylguanidiniumtriflate (tmgtf) was found to be an efficient catalyst solvent for henry reaction between nitromethane and isatin derivatives to provide 3-hydroxy-3-(nitromethyl)indolin-2-one under mild conditions. the ionic liquid amenable to successive recycling without appreciable decrease in activity. synthesized compounds have been screened for their anti-di...

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