نتایج جستجو برای: ugi four component

تعداد نتایج: 1200492  

2014
Netsanet Gizaw Assefa Laila Niiranen Kenneth A. Johnson Hanna-Kirsti Schrøder Leiros Arne Oskar Smalås Nils Peder Willassen Elin Moe

Uracil-DNA N-glycosylase from Atlantic cod (cUNG) shows cold-adapted features such as high catalytic efficiency, a low temperature optimum for activity and reduced thermal stability compared with its mesophilic homologue human UNG (hUNG). In order to understand the role of the enzyme-substrate interaction related to the cold-adapted properties, the structure of cUNG in complex with a bacterioph...

Journal: :Organic & biomolecular chemistry 2015
Benito Alcaide Pedro Almendros Cristina Aragoncillo Ricardo Callejo M Pilar Ruiz M Rosario Torres

Passerini (P-3CR) and Ugi (U-4CR) reactions were investigated in 4-oxoazetidine-2-carboxaldehydes, affording the corresponding Passerini and Ugi adducts with moderate diastereoselectivity in high yields. Fortunately, the obtained mixtures of isomers syn/anti were separated in most cases. The scope of both IMCRs has been studied using a variety of isocyanides, carboxylic acids and amines. Ugi ad...

2002
Tara L. Shea Brian C. Jacobson Timothy C. Wang Thomas H. Lee

Disease management programs typically focus on a few common chronic conditions for which it is possible to simultaneously improve care and reduce costs, such as asthma and diabetes. Insufficient attention has been paid to the management of upper gastrointestinal (UGI) disorders, including peptic ulcer disease, gastritis, dyspepsia, and gastroesophageal reflux disease (GERD), although there are ...

Journal: :The Journal of biological chemistry 1992
S E Bennett D W Mosbaugh

The Bacillus subtilis bacteriophage PBS2 uracil-DNA glycosylase inhibitor (Ugi) protein was characterized and shown to form a stable complex with Escherichia coli uracil-DNA glycosylase (Ung). As determined by mass spectrometry, the Ugi protein had a molecular weight of 9,474. We confirmed this value by sedimentation equilibrium centrifugation and determined that Ugi exists as a monomeric prote...

Journal: :Proteomics. Clinical applications 2015
Holger Husi Richard J E Skipworth Andrew Cronshaw Nathan A Stephens Henning Wackerhage Carolyn Greig Kenneth C H Fearon James A Ross

PURPOSE Cancer of the upper digestive tract (uGI) is a major contributor to cancer-related death worldwide. Due to a rise in occurrence, together with poor survival rates and a lack of diagnostic or prognostic clinical assays, there is a clear need to establish molecular biomarkers. EXPERIMENTAL DESIGN Initial assessment was performed on urine samples from 60 control and 60 uGI cancer patient...

2017
Sze Li Siow Hans Alexander Mahendran Chee Ming Wong Nirumal Kumar Milaksh Myo Nyunt

BACKGROUND In recent years, staging laparoscopy has gained acceptance as part of the assessment of resectability of upper gastrointestinal (UGI) malignancies. Not infrequently, we encounter tumours that are either locally advanced; requiring neoadjuvant therapy or occult peritoneal disease that requires palliation. In all these cases, the establishment of enteral feeding during staging laparosc...

Journal: :Molbank 2021

The ongoing study is a Ugi-azide four-component reaction for the synthesis of 1,5-disubstituted tetrazole(1,5-DST), which involves an aldehyde, different amines, isocyanides, and as azide’s source Trimethylsilylazide (TMSN3), in water solvent using catalyst tetradecyltrimethylammonium bromide (TTAB) with load (10% mole), provides hydrophobic micellar site. This approach step toward green chemis...

Journal: :urban climate 2021

Sealed surfaces in urban areas change the water and energy balance resulting decreased evapotranspiration infiltration, magnified stormwater runoff, sensible heat fluxes. Urban Green Infrastructures (UGI) are implemented to reverse such effects. This study examines potential of a high-resolution grid-based model show impact different degrees land cover. The area was divided into 52 cells were c...

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