30,766 results match your criteria Journal of agricultural and food chemistry[Journal]


New β-Lactone with Tea Pathogenic Fungus Inhibitory Effect from Marine-derived Fungus MCCC3A00957.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

Fusarium solani H915 (MCCC3A00957), a fungus originating from mangrove sediment, showed potent inhibitory activity against tea pathogenic fungus Pestalotiopsis theae. Successive chromatographic separation on an ethyl acetate (EtOAc) extract of F. solani H915 resulted in the isolation of five new alkenoic diacid derivatives, fusarilactones A-C (1-3), fusaridioic acids B (4) and C (5), in addition to seven known compounds (6-12). Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00228DOI Listing
February 2019

Depression of Fungal Polygalacturonase Activity in Solanum lycopersicum Contributes to Antagonistic Yeast-Mediated Fruit Immunity to Botrytis.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

The acquisition of susceptibility to necrotrophy over the course of ripening is one of the critical factors limiting shelf life. In this study, phytopathology and molecular biology were employed to explore the roles of pectinase in fruit susceptibility and ripening. Solanum lycopersicum fruit softened dramatically from entirely green to 50% red, which was accompanied by a continuously higher expressed SlPG2 gene. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00031DOI Listing
February 2019

Influence of nitrogen levels on nutrient transporters and regulators of protein synthesis in small intestinal enterocytes of piglets.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

To investigate effects of dietary nitrogen level on nutrient absorption and utilization in small intestinal enterocyte of piglets , weaned piglets were fed for 10 d with diets containing 20%, 17%, or 14% crude protein (CP) with supplementation to meet requirements for essential amino acids in vivo, and IPEC-1 cells were cultured with different nitrogen levels (NL) in culture medium (70%, 85%, 100%) in vitro by mono-cultured and co-cultured of IPEC-1 and GES-1 cells. The results showed that: (1) In animal trail, decreased dietary CP reduced transcript abundance of nutrient transporters like CAT1, PepT1, GLUT2 and SGLT-1 in jejunal mucosa (P < 0.05), but 17% CP diet did not affect jejunal protein synthesis; (2) The transcript abundance of nutrient transporters displayed the similarly effective tendency in jejunal mucosa and co-cultured IPEC-1 rather than mono-cultured IPEC-1; (3) Decreased nitrogen levels reduced expressive abundance of PI3K, Class 3 PI3K, TSC2 and 4E-BP1 in mono-cultured IPEC-1 (P < 0. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06712DOI Listing
February 2019

Resveratroloside Alleviates Postprandial Hyperglycemia in Diabetic Mice by Competitively Inhibiting a-Glucosidase.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

The regulation of postprandial blood glucose (PBG) levels is an effective therapeutic method to treat diabetes and prevent diabetes-related complications. Resveratroloside is a mono-glucosylated form of stilbene that is present in red wine, grapes and several traditional medicinal plants. In our study, the effect of resveratroloside on reducing PBG was studied in vitro and in vivo. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00455DOI Listing
February 2019

Liquiritin from Glycyrrhiza uralensis attenuating rheumatoid arthritis via reducing inflammation, suppressing angiogenesis and inhibiting MAPK signaling pathway.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

Among the various treatments, induction of synoviocytes apoptosis by natural products during rheumatoid arthritis (RA) pathological condition can be considered of vast potential. However, it is unclear that liquiritin, a kind of natural flavonoid extracted from the roots of Glycyrrhiza uralensis, induced the apoptosis of synovial membrane and its molecular mechanism. In this study, interleukin-1β (IL-1β)-RA-FLS cells were incubated with different concentration of liquiritin. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00185DOI Listing
February 2019
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Activating Effects of Phenolics from Apache Red Zea mays L. on Free Fatty-Acid Receptor-1 and Glucokinase Evaluated with a Dual Culture System with Epithelial, Pancreatic and Liver Cells.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

The aim was to characterize a phenolic-rich water extract from the pericarp of an improved genotype of Apache red maize (RPE), and evaluate its ability to activate the type-2 diabetes markers free fatty acid receptor 1 (GPR40) and glucokinase (GK) in vitro. The extract contained mainly phenolic acids, anthocyanins, and other flavonoids. RPE inhibited α-amylase (IC50 = 88. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06642DOI Listing
February 2019

Potentiation of In Vivo Anticancer Efficacy of Selenium Nanoparticles by Mushroom Polysaccharides Surface Decoration.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

Selenium nanoparticles (SeNPs) are recently emerging as promising anticancer agents because of their high bioavailability, low toxicity and remarkable anticancer activities. However, the effects of surface physicochemical properties on the biological actions remain elusive. Herein we decorated selenium nanoparticles (SeNPs) with various water-soluble polysaccharides extracted from various mushrooms, to compare physical characteristics and anticancer profile of these SeNPs. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00193DOI Listing
February 2019

Factors Affecting Transfer of the Heavy Metals Arsenic, Lead, and Cadmium from Diatomaceous-Earth Filter Aids to Alcoholic Beverages during Laboratory-Scale Filtration.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

Center for Food Safety and Applied Nutrition, Office of Food Safety, Division of Food Processing Science and Technology , U.S. Food and Drug Administration , 6502 South Archer Road , Bedford Park , Illinois 60501 , United States.

Filtration methods for alcoholic fermented beverages often use filter aids such as diatomaceous earth (DE), which may contain elevated amounts of the heavy metals arsenic (As), lead (Pb), and cadmium (Cd). Here, we evaluated factors affecting transfer of these heavy metals from DE to beer and wine. A laboratory-scale filtration system was used to process unfiltered ale, lager, red wine, and white wine with three types of food-grade DE. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06062DOI Listing
February 2019

Binding of Plant Polyphenols to Serum Albumin and LDL: Healthy Implications for Heart Disease.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

Cardiovascular disease (CVD) is the leading cause of death in industrialized nations. The initiating event in atherosclerosis or hardening of the arteries, is oxidation of low density lipoprotein (LDL). Binding with serum albumin and LDL of 41 polyphenols (major antioxidants in plant foods) constituting four classes of flavonoids, three types of phenolic acids and seven polyphenol conjugate metabolites was investigated indirectly by fluorescence quenching and directly by affinity separation/HPLC (four of the polyphenols). Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06674DOI Listing
February 2019

Amount of Collagen in the Meat Contained in Japanese Daily Dishes and the Collagen Peptide Content in Human Blood after Ingestion of Cooked Fish Meat.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

Objectives of the present study were to evaluate amounts of collagen in Japanese daily dishes and contents of food-derived collagen peptides in human blood. The meat in one serving of most Japanese daily dishes contains 0.2-2. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06896DOI Listing
February 2019

Production, characterization and application of an alginate lyase, AMOR_PL7A, from hot vents in the Arctic Mid-Ocean Ridge.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

Enzymatic depolymerization of seaweed polysaccharides is gaining interest for the production of functional oligosaccharides and fermentable sugars. We describe a thermostable alginate lyase belonging to Polysaccharide Lyase family 7 (PL7), which can be used to degrade brown seaweed, Saccharina latissima, at conditions also suitable for a commercial cellulase cocktail (Cellic CTec2). This enzyme, AMOR_PL7A, is a β-D-mannuronate specific (EC 4. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b07190DOI Listing
February 2019

Enhanced sensitivity and effective cleanup strategy for analysis of neonicotinoids in complex dietary samples and the application in Total Diet Study.

J Agric Food Chem 2019 Feb 19. Epub 2019 Feb 19.

Extensive residues of neonicotinoids (neonics) have been demonstrated in food and environment by routine monitoring measurement, but little is known about the residue levels in "ready to eat" dietary samples. To obtain a more accurate picture of dietary exposure to total neonics, an ultra-sensitive and effective cleanup analytical method for the quantification of neonics in dietary samples was established based on cold-induced phase separation and pre-column dilution injection (PDI) liquid chromatography-high resolution mass spectrometry (LC-HRMS). A total of 10 neonics were quantified in ultra-trace amounts (ng/kg) using stable isotope dilution with calibration curves spanning four orders of magnitude. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00113DOI Listing
February 2019

Identification of the Key Aroma Compounds in Gluten-Free Rice Bread.

J Agric Food Chem 2019 Feb 19. Epub 2019 Feb 19.

Rice flour is commonly used as raw material in the preparation of gluten-free bread. However, compared to wheat bread, its aroma is different and often not accepted by consumers. Aroma profile analyses of the crumb and crust of freshly baked rice bread indicated a strong rice-like flavor, but lower intensities of the typical roasty wheat bread odor qualities. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00074DOI Listing
February 2019
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Rhein from Rheum rhabarbarum inhibits hydrogen peroxide-induced oxidative stress in intestinal epithelial cells partly through PI3K/Akt-mediated Nrf2/HO-1 pathways.

J Agric Food Chem 2019 Feb 19. Epub 2019 Feb 19.

Rheum rhabarbarum has been widely used as a herbal medicine and food in China. The objective of this study was to investigate the cytoprotective action and underlying mechanisms of rhein, one active ingredient isolated from Rheum rhabarbarum, on H2O2-challenged rat small intestine epithelial cells (IEC-6 cells). H2O2-challenged IEC-6 cells were incubated in the pretreatment with or without rhein or LY294002, a PI3K/Akt inhibitor. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00037DOI Listing
February 2019

Delivery of sesamol using polyethylene glycol-functionalized selenium nanoparticles in human liver cells in culture.

J Agric Food Chem 2019 Feb 19. Epub 2019 Feb 19.

Anticancer nanoparticles were fabricated by linking the nanoparticles of two known anticancer agents, sesamol and selenium, using polyethylene glycol (PEG). The successful fabrication of the sesamol-PEG-selenium nanoparticles (PEG-SeNPs), which had a sesamol loading efficiency of 10.0 ± 0. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06924DOI Listing
February 2019

Quantitation, organoleptic contribution and potential origin of diethyl acetals formed from various aldehydes in Cognac.

J Agric Food Chem 2019 Feb 19. Epub 2019 Feb 19.

Cognac Wine Distillate (WD), especially during their aging, are marked by complex and elegant aroma. This work aimed at expanding the knowledge on the Cognac WD aroma by a sensory-guided approach, involving fractional distillation technique and gas chromatography coupled to olfactometry and mass spectrometry (GC-O-MS). In doing so, a fruity odorous zone was highlighted in WD extracts which was attributed to the diethyl acetal family. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b01084DOI Listing
February 2019

Engineering the lva operon and Optimization of Culture Conditions for Enhanced Production of 4-Hydroxyvalerate from Levulinic Acid in Pseudomonas putida KT2440.

J Agric Food Chem 2019 Feb 22. Epub 2019 Feb 22.

Department of Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea.

Monomeric 4-hydroxyvalerate is a versatile chemical used to produce various commodities and fine chemicals. In the present study, the lvaAB gene was deleted from the lva operon in Pseudomonas putida KT2440 and tesB, obtained from Escherichia coli, was overexpressed under the control of the lva operon system, which is induced by the substrate levulinic acid and the product 4-hydroxyvalerate to produce 4-hydroxyvalerate from levulinic acid. The lvaAB-deleted strain showed almost complete conversion of levulinic acid to 4-hydroxyvalerate, compared with 24% conversion in the wild-type strain. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06884DOI Listing
February 2019

Pomegranate fruit and juice (cv Mollar), rich in ellagitannins and anthocyanins, also provide a significant content of a wide range of proanthocyanidins.

J Agric Food Chem 2019 Feb 15. Epub 2019 Feb 15.

Proanthocyanidins (PAs) were characterized in husk, membranes, arils and seeds of 'Mollar de Elche' pomegranate cultivar using LC-ESI-IT MS/MS after acid-catalysis in the presence of phloroglucinol (phloroglucinolysis). PAs were also evaluated in commercial juice and in the juice made in the laboratory by pressing fresh arils. Pomegranate PAs were composed of a very rich mixture of flavan-3-ols: catechin, epicatechin, gallocatechin, epigallocatechin, epigallocatechin gallate and epicatechin gallate. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b07155DOI Listing
February 2019

Physical and Antioxidant Properties of Edible Chitosan Ascorbate Films.

J Agric Food Chem 2019 Feb 21. Epub 2019 Feb 21.

Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research , Chinese Academy of Sciences , Yantai , Shandong 264003 , People's Republic of China.

Chitosan ascorbates with different substitution degrees were synthesized on the basis of salification of chitosan and ascorbic acid at various molar ratios in water and were successfully used to prepare antioxidative films by casting for the first time. Fourier transform infrared and H nuclear magnetic resonance spectra recorded the structural characteristics of all chitosan ascorbates; meanwhile, physicochemical property and antioxidant activity of the produced chitosan ascorbate films were characterized, with chitosan acetate film serving as the control, and these properties were also measured for comparison. The results revealed that salification of chitosan with ascorbic acid not only improved the total color difference, chroma, opacity, capacity for blocking ultraviolet-visible light, and water solubility of chitosan-based films but also decreased water content, swelling degree, and water vapor permeability compared to chitosan acetate film. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b04567DOI Listing
February 2019
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Impact of Bioconversion of Gallated Catechins and Flavonol Glycosides on Bioaccessibility and Intestinal Cellular Uptake of Catechins.

J Agric Food Chem 2019 Feb 15. Epub 2019 Feb 15.

Department of Food Science and Biotechnology , Sejong University , 98 Gunja-dong , Gwangjin-gu, Seoul 143-747 , Republic of Korea.

Two bioconversions were applied to green tea extracts (GTE) and flavonol glycoside rich fraction (FVNg) derived from insoluble green tea extract by tannase and cellulase treatment in order to obtain gallated catechins (EnzGTE) and flavonol aglycone rich fraction (FVNa), respectively. The bioaccessibility of epicatechins from GTE increased with the addition of FVNg, FVNa, and flavonol aglycone rich fraction of commercial production (FVNap). Epigallocatechin-gallate (EGCG) and epicatechin-gallate (ECG) were highly recovered 4- and 125-fold, respectively, by adding FVNap. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b05733DOI Listing
February 2019

A Practical ELISA for Azaspiracids in Shellfish via Development of a New Plate-Coating Antigen.

J Agric Food Chem 2019 Feb 14. Epub 2019 Feb 14.

Norwegian Veterinary Institute , P.O. Box 750 Sentrum, N-0106 Oslo , Norway.

Azaspiracids (AZAs) are a group of biotoxins that appear periodically in shellfish and can cause food poisoning in humans. Current methods for quantifying the regulated AZAs are restricted to LC-MS but are not well suited to detecting novel and unregulated AZAs. An ELISA method for total AZAs in shellfish was reported recently, but unfortunately, it used relatively large amounts of the AZA-1-containing plate-coating conjugate, consuming significant amounts of pure AZA-1 per assay. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b05652DOI Listing
February 2019
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A review of the sensory and chemical characteristics of almond flavor.

J Agric Food Chem 2019 Feb 14. Epub 2019 Feb 14.

Understanding almond flavor, both in terms of sensory aspects and chemistry, is essential for processors to maintain almond quality and to correctly identify acceptable or unacceptable product. This overview of the sensory and chemical characteristics of almond flavor discusses raw and heat-processed almonds, the volatile compounds generated upon heating, the aroma qualities associated with various volatiles, and the use of descriptive sensory analysis for almonds. Flavor development and off-flavors in almonds due to rancidity is also explored. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06606DOI Listing
February 2019

Fast determination of phenolic compounds in rice grains by UPLC-PDA: method development and validation.

J Agric Food Chem 2019 Feb 14. Epub 2019 Feb 14.

There are several phenolic compounds in rice grains providing benefits for human health. The concentration of phenolic compounds in rice are strongly affected by the polishing steps during rice production. A new sensitive ultra-performance liquid chromatography-ultraviolet-visible spectroscopy method with photodiode array detection protocol has been developed and validated for the quantitation of phenolic compounds in rice grains. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b05430DOI Listing
February 2019

Fast Discrimination of Chocolate Quality Based on Average-Mass-Spectra Fingerprints of Cocoa Polyphenols.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

SPO, Plateforme Polyphénols , Univ Montpellier, INRA, Montpellier SupAgro , 34060 Montpellier , France.

This work aims to sort cocoa beans according to chocolate sensory quality and phenolic composition. Prior to the study, cocoa samples were processed into chocolate in a standard manner, and then the chocolate was characterized by sensory analysis, allowing sorting of the samples into four sensory groups. Two objectives were set: first to use average mass spectra as quick cocoa-polyphenol-extract fingerprints and second to use those fingerprints and chemometrics to select the molecules that discriminate chocolate sensory groups. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06456DOI Listing
February 2019

Structure/Odor Activity Studies on Aromatic Mercaptans and Their Cyclohexane Analogues Synthesized by Changing the Structural Motifs of Naturally Occurring Phenyl Alkanethiols.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

Lehrstuhl für Lebensmittelchemie , Technische Universität Muenchen , Lise-Meitner-Straße 34 , D-85354 Freising , Germany.

Following a structure/odor activity approach as previously published, the present study was focused on three aromatic thiols also identified as food odorants, namely 1-phenylethane-1-thiol, phenyl methanethiol, and 2-phenylethanethiol. Their structures were systematically modified to receive 16 new sulfur-containing benzene derivatives. A determination of odor thresholds indicated that none of its homologues elicited a lower odor threshold than 1-phenylethane-1-thiol, and an enantiospecific synthesis, elucidated that its ( S)-enantiomer turned out to be the compound with by far the lowest odor threshold of 0. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00353DOI Listing
February 2019
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Association Genetics Identifies Single Nucleotide Polymorphisms Related to Kernel Oil Content and Quality in Camellia oleifera.

J Agric Food Chem 2019 Feb 21. Epub 2019 Feb 21.

State Key Laboratory of Tree Genetics and Breeding , Research Institute of Subtropical Forestry, Chinese Academy of Forestry , Hangzhou 311400 , China.

Camellia oleifera, as an important nonwood tree species for seed oil in China, has received enormous attention owing to its high unsaturated fatty acid contents benefited to human health. It is necessary to examine allelic diversity of key genes that are associated with oil production in C. oleifera cultivars with a large variation of fatty acid compositions. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b03399DOI Listing
February 2019

Chemical Characteristics of Sangiovese Wines from California and Italy of 2016 Vintage.

J Agric Food Chem 2019 Feb 22. Epub 2019 Feb 22.

DAGRI-Department of Agricultural, Food, Enviromental and Forestry Sciences and Technologies , University of Florence , via Donizetti 6 , 50144 Florence , Italy.

Sangiovese is the most widespread Italian red cultivar and constitutes the basis of internationally known wines such as Chianti and Brunello di Montalcino. Outside of Europe, Argentina is the largest producer, followed by the United States. This study sought to define and compare 2016 vintage Sangiovese wine composition from various production regions in California and Italy. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b05674DOI Listing
February 2019

Elucidation of Infusion-Induced Changes in the Key Odorants and Aroma Profile of Iranian Endemic Borage ( Echium amoenum) Herbal Tea.

J Agric Food Chem 2019 Feb 22. Epub 2019 Feb 22.

Department of Food Engineering, Faculty of Engineering , Adana Science and Technology University , 01110 Adana , Turkey.

Infusion-induced changes in the aroma and key odorants and their odor activity values of Iranian endemic herbal (Gol-Gavzaban) tea obtained from shade-dried violet-blue petals of borage ( Echium amoenum) were studied for the first time. Two hot teas and one cold tea were investigated and coded as 4MN (4 min/98 °C), 16MN (16 min/98 °C), and 24HR (24 h/ambient temperature), respectively. Aromatic extracts of the tea samples were isolated by the liquid-liquid extraction method and analyzed by gas chromatography-mass spectrometry-olfactometry (GC-MS-O) for the first time. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00531DOI Listing
February 2019
2.912 Impact Factor

Production of Triterpene Ginsenoside Compound K in the Non-conventional Yeast Yarrowia lipolytica.

J Agric Food Chem 2019 Feb 22. Epub 2019 Feb 22.

SynBio Research Platform , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072 , People's Republic of China.

Compound K (CK) is a rare, tetracyclic, triterpenoid compound with important medical properties, such as antitumor and anti-inflammatory activities. Herein, an efficient biosynthetic pathway of CK was constructed in metabolically engineered Yarrowia lipolytica for the first time, and the engineered strain, YL-CK0, produced 5.1 mg/L CK. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00009DOI Listing
February 2019

Digestion and colonic fermentation of raw and cooked Opuntia ficus-indica cladodes impacts bioaccessibility and bioactivity.

J Agric Food Chem 2019 Feb 13. Epub 2019 Feb 13.

The bioactivity of (poly)phenols from a food are interplay between the cooking methods applied and its interaction with the gastrointestinal tract. (Poly)phenolic profile and biological activity of raw and cooked cactus (Opuntia ficus-indica Mill.) cladodes following in vitro digestion and colonic fermentation were evaluated. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06480DOI Listing
February 2019

Cost-Effective and High-Reliability Analytical Approach for Multitoxin Screening in Bivalve Mollusks by Liquid Chromatography Coupled to Tandem Mass Spectrometry.

J Agric Food Chem 2019 Feb 22. Epub 2019 Feb 22.

Ministério da Agricultura, Pecuária e Abastecimento, Laboratório Nacional Agropecuário , Seção Laboratorial Avançada de São José (SLAV/SC/LANAGRO/RS) , Rua João Grumiché, 117 , São José , Santa Catarina 88102-600 , Brazil.

A fast, less expensive, analytical approach with high metrologic reliability was developed to assist an official program for 21 marine biotoxins, monitoring in bivalve mollusks. The simultaneous analysis of lipophilic and hydrophilic marine biotoxins was achieved using a sample preparation protocol based on solid-liquid extraction and low-temperature cleanup, followed by liquid chromatography coupled to tandem mass spectrometry. Samples were extracted with acidified methanol/water (90:10), followed by low-temperature cleanup. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.8b06600
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http://dx.doi.org/10.1021/acs.jafc.8b06600DOI Listing
February 2019
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An Improved, Rapid, and Sensitive Ultra-High-Performance Liquid Chromatography-High-Resolution Orbitrap Mass Spectrometry Analysis for the Determination of Highly Polar Pesticides and Contaminants in Processed Fruits and Vegetables.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

Chemical Safety Department , Stazione Sperimentale per l'Industria delle Conserve Alimentari (SSICA) , Viale Tanara 31/a , 43100 Parma , Italy.

A rapid, specific, and sensitive method based on quick polar pesticide extraction and ultra-high-performance liquid chromatography coupled to high-resolution mass spectrometry with an Orbitrap analyzer was evaluated. Usually, pesticides were analyzed individually using derivatization or ion-pairing techniques and detection by ion chromatography. We identified and simultaneously quantified 6 highly polar compounds (glyphosate, aminomethyl phosphonic acid (AMPA), phosphonic acid, fosetyl-Al, chlorate, and perchlorate) in 83 processed fruits and vegetables as well as 15 infant foods. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06483DOI Listing
February 2019

Phytochemicals Accumulation in Sanhua Plum ( Prunus salicina L.) during Fruit Development and Their Potential Use as Antioxidants.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

School of Food Science and Engineering, Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center) , South China University of Technology , Guangzhou 510640 , China.

This study followed the flesh reddening of Sanhua plum from the surface to the center during fruit development. Five key stages were identified based on color changes during fruit ripening: full-green (FG), red-appeared, half-red, full-red, and purple-red (PR). Fruits were collected and analyzed for phytochemicals and antioxidant properties. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b05087DOI Listing
February 2019

Some New Findings Regarding the Antiadhesive Activity of Cranberry Phenolic Compounds and Their Microbial-Derived Metabolites against Uropathogenic Bacteria.

J Agric Food Chem 2019 Feb 12. Epub 2019 Feb 12.

Institute of Food Science Research (CIAL) , CSIC-UAM , C/Nicolás Cabrera 9 , 28049 Madrid , Spain.

Findings concerning the antiadhesive activity of cranberry phenolic compounds and their microbial-derived metabolites against Gram-negative ( Escherichia coli ATCC 53503 and DSM 10791) and Gram-positive ( Enterococcus faecalis 04-1) bacteria in T24 cells are reported. A-Type procyanidins (A2 and cinnamtannin B-1) exhibited antiadhesive activity (at concentrations ≥250 μM), a feature that was not observed for B-type procyanidins (B2). The metabolites hippuric acid and α-hydroxyhippuric acid also showed effective results at concentrations ≥250 μM. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b05625DOI Listing
February 2019

Neuroprotective Secondary Metabolite Produced by an Endophytic Fungus, Neosartorya fischeri JS0553, Isolated from Glehnia littoralis.

J Agric Food Chem 2019 Feb 11;67(7):1831-1838. Epub 2019 Feb 11.

College of Pharmacy and Innovative Drug Center , Duksung Women's University , Seoul 01369 , Republic of Korea.

Roots of Glehnia littoralis have been used to heal stroke as a traditional medicine. Even though many studies on this plant have been conducted, the secondary metabolites produced by its endophytes and their bioactivities have not been investigated thus far. Therefore, a new meroditerpenoid named sartorypyrone E (1) and eight known compounds (2-9) were isolated from extracts of cultured Neosartorya fischeri JS0553, an endophyte of G. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b05481DOI Listing
February 2019

Oleanane-Type Saponins Biosynthesis in Panax notoginseng via Transformation of β-Amyrin Synthase Gene from Panax japonicus.

J Agric Food Chem 2019 Feb 11;67(7):1982-1989. Epub 2019 Feb 11.

Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , China.

Oleanane-type saponins considered as the main medicinal ingredients in Panax japonicus are not found in Panax notoginseng. β-Amyrin synthase (βAS) was recognized as the first key enzyme in the biosynthetic branch of oleanane-type saponins. In this study, βAS gene from P. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b07183DOI Listing
February 2019

Technological Quality and Nutritional Value of Two Durum Wheat Varieties Depend on Both Genetic and Environmental Factors.

J Agric Food Chem 2019 Feb 19. Epub 2019 Feb 19.

Interdepartmental Center SITEIA.PARMA , University of Parma , Parco Area delle Scienze , 43124 Parma , Italy.

Durum wheat ( Triticum turgidum L. subsp. durum (Desf. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.8b06621
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http://dx.doi.org/10.1021/acs.jafc.8b06621DOI Listing
February 2019
2 Reads
2.912 Impact Factor

Rapid Assessment of Deep Frying Oil Quality as Well as Water and Fat Contents in French Fries by Low-Field Nuclear Magnetic Resonance.

J Agric Food Chem 2019 Feb 18. Epub 2019 Feb 18.

School of Medical Instrument and Food Engineering , University of Shanghai for Science and Technology , Shanghai 200093 , China.

Most of the health hazards in fried foods are related to unqualified frying oil and excessive oil content. In this study, the feasibility of using low-field nuclear magnetic resonance techniques (LF-NMR) for analysis of the water and oil contents in French fries, as well as simultaneous evaluation of frying oil quality during deep frying, was investigated. Three proton populations were identified and successfully assigned to water and oil relaxation signals. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b05639DOI Listing
February 2019

(-)-Epigallocatechin Gallate (EGCG) Enhances the Sensitivity of Colorectal Cancer Cells to 5-FU by Inhibiting GRP78/NF-κB/miR-155-5p/MDR1 Pathway.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

Institute of Biotechnology, Key Laboratory of Chemical Biology and Molecular Engineering of National Ministry of Education , Shanxi University , Taiyuan 030006 , China.

Green tea accounts for approximately 20% of the world's total tea yield. (-)-Epigallocatechin gallate (EGCG) is an active catechin in green tea, which suppresses tumor growth and enhances drug sensitivity in various cancers, but the molecular mechanism is still unclear. Chemotherapy drugs, such as 5-fluorouracil (5-FU), are a common strategy for clinical treatment of cancer patients; however, the lower response rate caused by prolonged use becomes the main reason for tumor recurrence. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06665DOI Listing
February 2019

Comparative Study on the Chemical Structure and In Vitro Antiproliferative Activity of Anthocyanins in Purple Root Tubers and Leaves of Sweet Potato ( Ipomoea batatas).

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

The structure and in vitro antiproliferative activity of anthocyanins in the root tubers of a sweet potato variety cv. Bhu Krishna and the purple leaves of a promising accession S-1467 were studied with the objectives of understanding the structure-activity relationship and comparing the leaf and tuber anthocyanins. The chemical structure of anthocyanins was determined by high-resolution electrospray ionization mass spectrometry analysis. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b05473DOI Listing
February 2019

Prevention of Obesity and Hyperlipidemia by Heptamethoxyflavone in High-fat Diet-induced Rats.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

College of Food Science , South China Agricultural University , Guangzhou 510642 , People's Republic of China.

Polymethoxyflavones (PMFs) have been shown to prevent obesity, ameliorate type 2 diabetes, and regulate lipid metabolism in vitro and in vivo. However, little is known about the contribution of 3,5,6,7,8,3',4'-heptamethoxyflavone (HMF) to prevent obesity and regulate lipid metabolism in vivo. We aimed to investigate the potential efficacy of HMF on preventing obesity and hyperlipidemia in rats fed a high-fat diet (HFD) and its underlying mechanisms. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b05632DOI Listing
February 2019
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Characterization and Exploration of Recombinant Wheat Catalase for Improvement of Wheat-Flour-Processing Quality.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), School of Food Science and Engineering , South China University of Technology , Guangzhou , Guangdong 510640 , China.

The wheat catalase gene ( wcat1) was cloned and overexpressed in Pichia pastoris. The purified wCat1 exhibits its highest activity at pH 7.5 and 35 °C with K and V of 22. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06646DOI Listing
February 2019

Highly Efficient and Enzyme-Recoverable Method for Enzymatic Concentrating Omega-3 Fatty Acids Generated by Hydrolysis of Fish Oil in a Substrate-Constituted Three-Liquid-Phase System.

J Agric Food Chem 2019 Feb 20. Epub 2019 Feb 20.

School of Light Industry and Food Sciences , South China University of Technology , Guangzhou 510641 , People's Republic of China.

A novel three-liquid-phase system which contained fish oil as the nonpolar phase was developed for the lipase-based hydrolysis of fish oil and subsequent enrichment of the omega-3 polyunsaturated fatty acids (n-3 PUFA) in the glyceride fraction of the fish oil. In comparison with the traditional oil/water system, the enrichment factor of n-3 PUFA in this system was increased by 363.4% as a result of a higher dispersity, higher selectivity of the lipase for the other fatty acids except for n-3PUFA, and relief of product inhibition. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06382DOI Listing
February 2019

Enteroids: Promising in Vitro Models for Studies of Intestinal Physiology and Nutrition in Farm Animals.

J Agric Food Chem 2019 Feb 19. Epub 2019 Feb 19.

Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture Chinese Academy of Sciences, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture , Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process , Changsha , Hunan 410125 , China.

The lack of sophisticated in vitro models limits our current understanding of gastrointestinal functions in farm animals. Conventional 2D cell lines or primary cells fail to recapitulate the physiology of in vivo intestinal epithelium. In contrast stem cell-derived, nontransformed 3D enteroids partially recreate the villus-crypt anatomy of the native intestine and comprise most if not all intestinal cell types including enterocytes, enteroendocrine cells, goblet cells, Paneth cells, and stem cells. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06908DOI Listing
February 2019
2.912 Impact Factor

Melatonin Inhibits Ethylene Synthesis via Nitric Oxide Regulation To Delay Postharvest Senescence in Pears.

J Agric Food Chem 2019 Feb 15. Epub 2019 Feb 15.

College of Horticulture , Northwest A&F University , Taicheng Road NO.3 , Yangling , Shaanxi Province 712100 , China.

Understanding ripening and senescence processes in postharvest stored fruit is key to the identification and implementation of effective treatment methods. Here, we explored the effects of exogenous applications of melatonin (MT) and nitric oxide (NO) on ripening and softening processes in three cultivars of European pear ( Pyrus communis L.). Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.8b06580
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http://dx.doi.org/10.1021/acs.jafc.8b06580DOI Listing
February 2019
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Antifungal Metabolite p-Aminobenzoic Acid (pABA): Mechanism of Action and Efficacy for the Biocontrol of Pear Bitter Rot Disease.

J Agric Food Chem 2019 Feb 18. Epub 2019 Feb 18.

Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences , Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology , Nanjing 210014 , People's Republic of China.

Colletotrichum fructicola, a fungal pathogen that causes bitter rot disease in pears, has recently emerged in Eastern Asia and caused enormous economic losses and crop penalties. For this reason, new strategies for the management of bitter rot disease are greatly needed and can have a great impact on the field. In this regard, our research group recently reported that p-aminobenzoic acid (pABA), which was found in the secretions of rhizobacterium Lysobacter antibioticus OH13, showed a broad spectrum of antifungal activities. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.8b05618
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http://dx.doi.org/10.1021/acs.jafc.8b05618DOI Listing
February 2019
5 Reads

Residue Distribution, Dissipation Behavior, and Removal of Four Fungicide Residues on Harvested Apple after Waxing Treatment.

J Agric Food Chem 2019 Feb 18. Epub 2019 Feb 18.

College of Science , China Agricultural University , Beijing 100193 , China.

The residue distribution and dissipation of pyrimethanil, fludioxonil, cyprodinil, and kresoxim-methyl, which were introduced during postharvest waxing treatments of apples, were investigated. In addition, different residue removal methods were tested for the four fungicides in apples, and the removal efficiencies were compared. A multiresidue analytical method was developed based on quick, easy, cheap, effective, rugged, and safe method (QuEChERS) for the determination of the fungicide residues in apples. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06254DOI Listing
February 2019
2.912 Impact Factor

Detection and Seasonal Variations of Huanglongbing Disease in Navel Orange Trees Using Direct Ionization Mass Spectrometry.

J Agric Food Chem 2019 Feb 18. Epub 2019 Feb 18.

Citrus greening disease [Huanglongbing (HLB)] is the most destructive disease of citrus. In this work, we have established a metabolite-based mass spectrometry (MS) method for rapid detection of HLB in navel orange trees. Without sample pretreatment, characteristic mass spectra can be directly obtained from the raw plant samples using the direct MS method. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06427DOI Listing
February 2019

Insights into Urease Inhibition by N-( n-Butyl) Phosphoric Triamide through an Integrated Structural and Kinetic Approach.

J Agric Food Chem 2019 Feb 18. Epub 2019 Feb 18.

Laboratory of Bioinorganic Chemistry, Department of Pharmacy and Biotechnology , University of Bologna , 40126 Bologna , Italy.

The nickel-dependent enzyme urease represents a negative element for the efficiency of soil nitrogen fertilization as well as a virulence factor for a large number of pathogenic and antibiotic-resistant bacteria. The development of ever more efficient urease inhibitors demands knowledge of their modes of action at the molecular level. N-( n-Butyl)-phosphoric triamide (NBPTO) is the oxo-derivative of N-( n-butyl)-thiophosphoric triamide (NBPT), which is extensively employed in agriculture to increase the efficiency of urea-based fertilizers. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b04791DOI Listing
February 2019