نتایج جستجو برای: hmf

تعداد نتایج: 984  

2016
Dmitry S Ryabukhin Dmitry N Zakusilo Mikhail O Kompanets Anton A.Tarakanov Irina A Boyarskaya Tatiana O Artamonova Mikhail A Khohodorkovskiy Iosyp O Opeida Aleksander V Vasilyev

The reaction of 5-hydroxymethylfurfural (5-HMF) with arenes in superacidic trifluoromethanesulfonic acid (triflic acid, TfOH) as the solvent at room temperature for 1-24 h gives rise to 5-arylmethylfurfurals (yields of 17-91%) and 2-arylmethyl-5-(diarylmethyl)furans (yields of 10-37%). The formation of these two types of reaction products depends on the nucleophilicity of the arene. The same re...

Journal: :Talanta 2006
Nadia Spano Lucia Casula Angelo Panzanelli Maria I Pilo Paola C Piu Roberta Scanu Andrea Tapparo Gavino Sanna

The use of the RP-HPLC official method of the International Honey Commission (IHC) for the determination of 5-hydroxymethylfurfural (HMF) in strawberry tree honey (Arbutus unedo, a typical Sardinian honey) has brought to light a specific and heavy chromatographic interference that prevents accurate quantification. The interference has been identified as homogentisic acid (HA), i.e. the marker o...

2013
Jin Deng Tao Pan Qing Xu Meng-Yuan Chen Ying Zhang Qing-Xiang Guo Yao Fu

Formose reaction converts formaldehyde to carbohydrates. We found that formose reaction can be used linking the biomass gasification with the aqueous-phase processing (APP) to produce liquid transportation fuel in three steps. First, formaldehyde from syn-gas was converted to triose. This was followed by aldol condensation and dehydration to 4-hydroxymethylfurfural (4-HMF). Finally, 4-HMF was h...

2013
Charles M. Cai Taiying Zhang Rajeev Kumar Charles E. Wyman

A novel single phase co-solvent system using tetrahydrofuran (THF) promotes hydrolysis of maple wood to sugars, sugar dehydration, and lignin extraction simultaneously and achieves higher overall yields of the fuel precursors furfural, 5-hydroxymethylfurfural (HMF), and levulinic acid (LA) than previously reported from biomass. In a one-pot reaction, we obtained yields of 86% furfural, 21% HMF,...

2011
Daniela B. M. Barbosa Marcus V. M. Nascimento Roberta C. Lino Marta R. Magalhães Iziara F. Florentino Tereza C. D. Honório Pablinny M. Galdino Maria Teresa F. Bara José R. de Paula Elson A. Costa

Acetic acid-induced writhing, hot-plate, carrageenan-induced pleurisy, formalin-induced pain, croton oil-induced ear edema, vascular permeability tests and phospholipase A2 activity assay were used to study the analgesic and/or antiinflammatory activity of the hydromethanolic fraction of ethanolic extract from Spiranthera odoratissima A. St.-Hil., Rutaceae, leaves (HMF) and its subfraction (sub...

Journal: :Chemistry 2011
Tim Ståhlberg Sergio Rodriguez-Rodriguez Peter Fristrup Anders Riisager

The dehydration of glucose and other hexose carbohydrates to 5-(hydroxymethyl)furfural (HMF) was investigated in imidazolium-based ionic liquids with boric acid as a promoter. A yield of up to 42% from glucose and as much as 66% from sucrose was obtained. The yield of HMF decreased as the concentration of boric acid exceeded one equivalent, most likely as a consequence of stronger fructose-bora...

2016

5-HMF was discovered and first synthesised from inulin over a century ago (G. Dull, Chemiker Zeitung, 1895, 216). The substance was first identified in food in the 1950s. It is generated in the process of heating food containing sugar or carbohydrates, the result of a reaction from reducing hexoses in the presence of amino acids or proteins, as described by Maillard in 1912. 5-HMF levels can be...

2016
Guiting Lin Nan Zhang

The 2016 Great Wall International Translational Andrology and Urology Forum, and Huaxia Medical ForumGenitourinary Tumor (HMF-GUT2016 & GITAU2016) will be held at Tianjin Convention Center, Tianjin, China, April 15–17, 2016. Please visit the meeting website (http:// www.gua-hmf2016.com) for more information. HMF-GUT2016 & GITAU2016 is organized by China International Exchange and Promotive Asso...

2015
Daehwan Chung Tobin J Verbeke Karissa L Cross Janet Westpheling James G Elkins

BACKGROUND Compounds such as furfural and 5-hydroxymethylfurfural (5-HMF) are generated through the dehydration of xylose and glucose, respectively, during dilute-acid pretreatment of lignocellulosic biomass and are also potent microbial growth and fermentation inhibitors. The enzymatic reduction of these furan aldehydes to their corresponding, and less toxic, alcohols is an engineering approac...

Journal: :Pediatrics 2012
Janine Jason

BACKGROUND Invasive Cronobacter infection is rare, devastating, and epidemiologically/microbiologically linked to powdered infant formulas (PIFs). In 2002-2004, the US Food and Drug Administration advised health care professionals to minimize PIF and powdered human milk fortifier (HMF)'s preparation, feeding, and storage times and avoid feeding them to hospitalized premature or immunocompromise...

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