keyword
MENU ▼
Read by QxMD icon Read
search

hmf

keyword
https://www.readbyqxmd.com/read/28322944/new-insights-into-non-enzymatic-glycation-of-human-serum-albumin-biopolymer-a-study-to-unveil-its-impaired-structure-and-function
#1
Alok Raghav, Jamal Ahmad, Khursheed Alam, Asad U Khan
Albumin glycation and subsequent formation of advanced glycation end products (AGEs) correlate with diabetes and associated complications. Human Serum Albumin (HSA) was modified with d-glucose for a 40day period under sterile conditions at 37°C. Modified samples along with native HSA (unmodified) were analyzed for impairment in biochemical characteristics ((fructosamine, carbonyl, thiol, lysine, arginine, hydroxymethyl furfural [HMF] content), electrochemical (electrical conductance), simulated gastric fluid assay, simulated intestinal fluid assay, spectroscopic properties (UV, fluorescence), optical (surface contact angle) and fluid dynamics (viscosity and Stokes radius)...
March 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28317713/a-validated-fast-difference-spectrophotometric-method-for-5-hydroxymethyl-2-furfural-hmf-determination-in-corn-syrups
#2
Jucimara Kulek de Andrade, Camila Kulek de Andrade, Emy Komatsu, Hélène Perreault, Yohandra Reyes Torres, Marcos Roberto da Rosa, Maria Lurdes Felsner
Corn syrups, important ingredients used in food and beverage industries, often contain high levels of 5-hydroxymethyl-2-furfural (HMF), a toxic contaminant. In this work, an in house validation of a difference spectrophotometric method for HMF analysis in corn syrups was developed using sophisticated statistical tools by the first time. The methodology showed excellent analytical performance with good selectivity, linearity (R(2)=99.9%, r>0.99), accuracy and low limits (LOD=0.10mgL(-1) and LOQ=0.34mgL(-1))...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28317245/efficient-discovery-of-quality-control-markers-for-gastrodia-elata-tuber-by-fingerprint-efficacy-relationship-modelling
#3
Mingfang Li, Yuan Du, Long Wang, Lilong Jiang, Xiaodong Ma, Ping Zhou, Ping Li, Huijun Li
INTRODUCTION: Gastrodia elata tuber (GET) has been widely used in China as a famous herbal medicine. However, the quality control markers (QCMs) for GET still need further investigation. OBJECTIVE: To develop a rational strategy based on fingerprint-efficacy relationship modelling to discover the efficacy-related QCMs, using GET as a case study. METHODOLOGY: The high-performance liquid chromatography (HPLC) fingerprints of 13 batches of GET extracts were established and 10 common peaks were structurally characterised by HPLC coupled with quadrupole time-of-flight mass spectrometry (QTOF-MS)...
March 20, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28272798/acidic-zeolite-l-as-a-highly-efficient-catalyst-for-dehydration-of-fructose-to-5-hydroxymethylfurfural-in-ionic-liquid
#4
Zhongsen Ma, Hualei Hu, Zhongqiang Sun, Wenting Fang, Jian Zhang, Longfei Yang, Yajie Zhang, Lei Wang
Zeolite L was synthesized by the hydrothermal method and post-treated by NH4-exchange to adjust its acidity. The samples were systematic characterized by various techniques including XRD, XRF, N2 adsorption-desorption, SEM, Py-IR, and NH3-TPD. The results demonstrate that the NH4-exchange post-treatment increase the surface areas, micropore volume, and acidity of zeolite L. The catalytic performances of the samples were tested in the dehydration of fructose to 5-hydroxymethylfurfural (HMF) in ionic liquid (1-butyl-3-methylimidazolium bromide ([bmim]Br))...
March 8, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28260667/microbial-biodiesel-production-from-oil-palm-biomass-hydrolysate-using-marine-rhodococcus-sp-yhy01
#5
Shashi Kant Bhatia, Junyoung Kim, Hun-Seok Song, Hyun Joong Kim, Jong-Min Jeon, Ganesan Sathiyanarayanan, Jeong-Jun Yoon, Kyungmoon Park, Yun-Gon Kim, Yung-Hun Yang
The effect of various biomass derived inhibitors (i.e. furfural, hydroxymethylfurfural (HMF), vanillin, 4-hydroxy benzaldehyde (4-HB) and acetate) was investigated for fatty acid accumulation in Rhodococcus sp. YHY 01. Rhodococcus sp. YHY01 was able to utilize acetate, vanillin, and 4-HB for biomass production and fatty acid accumulation. The IC50 value for furfural (3.1mM), HMF (3.2mM), vanillin (2.0mM), 4-HB (2.7mM) and acetate (3.7mM) was calculated. HMF and vanillin affect fatty acid composition and increase saturated fatty acid content...
February 20, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28254674/hydrothermal-conversion-of-n-acetyl-d-glucosamine-to-5-hydroxymethylfurfural-using-ionic-liquid-as-a-recycled-catalyst-in-a-water-dimethyl-sulfoxide-mixture
#6
Hongjun Zang, Songbai Yu, Pengfei Yu, Hongying Ding, Yannan Du, Yuchan Yang, Yiwen Zhang
Here, N-acetyl-d-glucosamine (GlcNAc), the monomer composing the second most abundant biopolymer, chitin, was efficiently converted into 5-hydroxymethylfurfural (5-HMF) using ionic liquid (IL) catalysts in a water/dimethyl sulfoxide (DMSO) mixture solvent. Various reaction parameters, including reaction temperature and time, DMSO/water mass ratios and catalyst dosage were optimized. A series of ILs with different structures were analyzed to explore their impact on GlcNAc conversion. The substrate scope was expanded from GlcNAc to d-glucosamine, chitin, chitosan and monosaccharides, although 5-HMF yields obtained from polymers and other monosaccharides were generally lower than those from GlcNAc...
February 11, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/28245567/permeation-of-polymethoxyflavones-into-the-mouse-brain-and-their-effect-on-mk-801-induced-locomotive-hyperactivity
#7
Satoshi Okuyama, Kohei Miyazaki, Rie Yamada, Yoshiaki Amakura, Morio Yoshimura, Atsushi Sawamoto, Mitsunari Nakajima, Yoshiko Furukawa
Accumulating data have indicated that citrus polymethoxyflavones (PMFs) have the ability to affect brain function. In the present study, we showed that 3,5,6,7,8,3',4'-heptamethoxy- flavone (HMF) given intraperitoneally to mice was immediately detected in the brain and that the permeability of the brain tissues to it was significantly higher than that of other citrus PMFs (nobiletin, tangeretin, and natsudaidain). The permeation of these PMFs into the brain well correlated with their abilities to suppress MK-801-induced locomotive hyperactivity, suggesting that HMF had the ability to act directly in the brain...
February 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28242956/simultaneous-inhibition-of-acrylamide-and-hydroxymethylfurfural-formation-by-sodium-glutamate-microcapsules-in-an-asparagine-glucose-model-system
#8
Zimeng Wang, Chao Wen, Xingbo Shi, Dai Lu, Jiehong Deng, Fangming Deng
Inhibiting the formation of acrylamide (AA) and hydroxymethylfurfural (HMF) during food heating processes has attracted considerable investigative efforts due to potential health concerns associated with these compounds. The main purpose of this work is to demonstrate a strategy to simultaneously inhibit the formation of AA and HMF with sodium glutamate microcapsules selected to confirm the efficacy of this strategy. An asparagine-glucose aqueous model system was prepared containing free sodium glutamate and sodium glutamate microcapsules...
February 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28231180/evolution-of-the-maillard-reaction-in-glutamine-or-arginine-dextrinomaltose-model-systems
#9
Silvia Pastoriza, José Ángel Rufián-Henares, Belén García-Villanova, Eduardo Guerra-Hernández
Enteral formulas are foods designed for medical uses to feed patients who are unable to eat normally. They are prepared by mixing proteins, amino acids, carbohydrates and fats and submitted to sterilization. During thermal treatment, the Maillard reaction takes place through the reaction of animo acids with reducing sugars. Thus, although glutamine and arginine are usually added to improve the nutritional value of enteral formulas, their final concentration may vary. Thus, in the present paper the early, intermediate, and advanced states of the Maillard reaction were studied in model systems by measuring loss of free amino acids through the decrease of fluorescence intensity with o-phtaldialdehyde (OPA), 5-Hydroximethylfurfural (HMF), furfural, glucosylisomaltol, fluorescence, and absorbance at 420 nm...
December 7, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28231083/evaluation-of-the-availability-and-antioxidant-capacity-of-maillard-compounds-present-in-bread-crust-studies-in-caco-2-cells
#10
Silvia Pastoriza de la Cueva, Isabel Seiquer, Marta Mesías, José Ángel Rufián-Henares, Cristina Delgado-Andrade
Bread crust is one of the major contributors to the intake of Maillard reaction products (MRP). MRP improve the organoleptic properties of foods and can provide biological actions such as antioxidant properties. The transport and availability of Amadori compounds (measured as furosine) and hydroxymethylfurfural (HMF)-early and intermediary MRP-from enzymatically digested bread crust (BC) and from its soluble low-molecular weight (LMW) and high-molecular weight (HMW) fractions were investigated in the Caco-2 cell line...
January 11, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28230746/oxidation-of-5-chloromethylfurfural-cmf-to-2-5-diformylfuran-dff
#11
Ana I Vicente, Jaime A S Coelho, Svilen P Simeonov, Hristina I Lazarova, Margarita D Popova, Carlos A M Afonso
2,5-Diformylfuran (DFF) is an important biorenewable building block, namely for the manufacture of new polymers that may replace existing materials derived from limited fossil fuel resources. The current reported methods for the preparation of DFF are mainly derived from the oxidation of 5-hydroxymethylfurfural (HMF) and, to a lesser extent, directly from fructose. 5-Chloromethylfurfural (CMF) has been considered an alternative to HMF as an intermediate building block due to its advantages regarding stability, polarity, and availability from glucose and cellulose...
February 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28225129/one-pot-conversion-of-biomass-derived-xylose-and-furfural-into-levulinate-esters-via-acid-catalysis
#12
Xun Hu, Shengjuan Jiang, Liping Wu, Shuai Wang, Chun-Zhu Li
Direct conversion of biomass-derived xylose and furfural into levulinic acid, a platform molecule, via acid-catalysis has been accomplished for the first time in dimethoxymethane/methanol. Dimethoxymethane acted as an electrophile to transform furfural into 5-hydroxymethylfurfural (HMF). Methanol suppressed both the polymerisation of the sugars/furans and the Aldol condensation of levulinic acid/ester.
February 22, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28222178/effect-of-meal-composition-on-postprandial-lipid-concentrations-and-lipoprotein-particle-numbers-a-randomized-cross-over-study
#13
Meena Shah, Manall Jaffery, Beverley Adams-Huet, Brian Franklin, Jonathan Oliver, Joel Mitchell
BACKGROUND: It is unclear how high-protein (HP) and high-monounsaturated fat (HMF) meals affect postprandial blood lipids and lipoprotein particle numbers (LPN). PURPOSE: To compare a HP versus a HMF meal on postprandial lipid and LPN responses. METHODS: Twenty-four participants (age: 36.3±15.0 years; body mass index: 23.6±2.0 kg/m2; 45.8% female) were fed a HP (31.9% energy from protein) and a HMF (35.2% fat and 20.7% monounsaturated fat) meal in a randomized cross-over trial design...
2017: PloS One
https://www.readbyqxmd.com/read/28216906/quality-by-design-multivariate-model-for-multicomponent-quantification-in-refining-process-of-honey
#14
Xiaoying Li, Zhisheng Wu, Xin Feng, Shanshan Liu, Xiaojie Yu, Qun Ma, Yanjiang Qiao
OBJECTIVE: A method for rapid analysis of the refining process of honey was developed based on near-infrared (NIR) spectroscopy. METHODS: Partial least square calibration models were built for the four components after the selection of the optimal spectral pretreatment method and latent factors. RESULTS: The models covered the samples of different temperatures and time points, therefore the models were robust and universal. CONCLUSIONS: These results highlighted that the NIR technology could extract the information of critical process and provide essential process knowledge of the honey refining process...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28188638/assessing-the-effect-of-5-hydroxymethylfurfuralon-on-selected-components-of-immune-responses-in-mice-immunized-with-ovalbumin
#15
Mohammad Alizadeh, Hamed Khodaei, Mehran Mesgari Abbasi, Sevda Saleh-Ghadimi
BACKGROUND: 5-hydroxymethylfurfural (5-HMF) is one of the most important products of the maillard reaction. In recent years, many profitable biological effects of this compound have been demonstrated. This study sought to elucidate the anti-allergic effect of 5-HMF by investigating some selected components of the immune response in BALB/c mice immunized with ovalbumin (OVA). RESULTS: Immunized animals had an increased level of serum total and OVA-specific antibodies when compared to the control (P < 0...
February 11, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28163781/enhancement-of-furan-aldehydes-conversion-in-zymomonas-mobilis-by-elevating-dehydrogenase-activity-and-cofactor-regeneration
#16
Xia Wang, Qiuqiang Gao, Jie Bao
BACKGROUND: Furfural and 5-hydroxymethylfurfural (HMF) are the two major furan aldehyde inhibitors generated from lignocellulose dilute acid pretreatment which significantly inhibit subsequent microbial cell growth and ethanol fermentation. Zymomonas mobilis is an important strain for cellulosic ethanol fermentation but can be severely inhibited by furfural and (or) HMF. Previous study showed that Z. mobilis contains its native oxidoreductases to catalyze the conversion of furfural and HMF, but the corresponding genes have not been identified...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28160439/selective-hydrodeoxygenation-of-5-hydroxymethylfurfural-to-2-5-dimethylfuran-over-heterogeneous-iron-catalysts
#17
Jiang Li, Jun Ling Liu, He Yang Liu, Guang Yue Xu, Jun Jie Zhang, Jia Xing Liu, Guang Lin Zhou, Qin Li, Zhi Hao Xu, Yao Fu
This work provided the first example of selective hydrodeoxygenation of 5-hydroxymethylfurfural to 2,5-dimethylfuran over heterogeneous iron catalysts. Catalyst prepared by the pyrolysis of iron-phenanthroline complex on activated carbon at 800 oC was demonstrated to be the most active heterogeneous iron catalyst. Under the optimal reaction condition, complete conversion of HMF was achieved with an 86.2% selectivity of DMF. The reaction pathway was investigated thoroughly, and the hydrogenation of C=O bond in HMF was demonstrated to be the rate-determining step during the hydrodeoxygenation, which will be accelerated greatly by using alcohol solvents as additional H-donors...
February 3, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28159285/classification-of-adulterated-honeys-by-multivariate-analysis
#18
Saber Amiry, Mohsen Esmaiili, Mohammad Alizadeh
In this research, honey samples were adulterated with date syrup (DS) and invert sugar syrup (IS) at three concentrations (7%, 15% and 30%). 102 adulterated samples were prepared in six batches with 17 replications for each batch. For each sample, 32 parameters including color indices, rheological, physical, and chemical parameters were determined. To classify the samples, based on type and concentrations of adulterant, a multivariate analysis was applied using principal component analysis (PCA) followed by a linear discriminant analysis (LDA)...
June 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28156113/origin-of-the-regioselectivity-in-the-aldol-condensation-between-hydroxymethylfurfural-and-levulinic-acid-a-dft-investigation
#19
Liwei Zhao, Nnenna Elechi, Richard Qian, Timila B Singh, Ananda S Amarasekara, Hua-Jun Fan
Our previous work demonstrated that hydroxide ion (OH(-)) was able to catalyze aldol condensation reaction at room temperature between 5-hydroxymethylfurfural (HMF) and levulinic acid (LA). This work identified three primary reaction steps in this condensation reaction using density functional theory (DFT): (1) deprotonation of LA to generate LA ions, (2) LA ions addition at hydroxymethyl site of HMF, and (3) internal dehydration to form the condensation product. The reaction pathway through the C5 of LA forms a linear product that is favored with respect to both energy and configuration in all three elementary reaction steps...
February 27, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28124823/synthesis-of-fdca-esters-without-concomitant-levulinic-acid-formation-starting-from-non-food-feedstocks
#20
Frits van der Klis, Jacco van Haveren, Daan S van Es, Harry Bitter
5-(Hydroxymethyl)-furfural (HMF) is a versatile intermediate in biomass conversion pathways, however the notoriously unstable nature of HMF imposes challenges to design selective routes to chemicals like furan-2,5-dicarboxylic acid (FDCA). Here we present a new strategy for obtaining furans, bypassing the formation of the unstable HMF. Instead of starting with glucose/fructose and thus forming HMF as an intermediate, the new route starts from uronic acids, which are abundantly present in many agro residues like e...
January 26, 2017: ChemSusChem
keyword
keyword
106130
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"