31,042 results match your criteria Journal of agricultural and food chemistry[Journal]


EjHAT1 participates in heat-alleviation of loquat fruit lignification by suppressing the promoter activity of key lignin monomer synthesis gene EjCAD5.

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

Texture attributes such as firmness and lignification are important for fruit quality. Lignification has been widely studied in model plants and energy crops but fruit lignification has rarely been reported, despite it having an adverse effect on fruit quality and consumer preference. Chilling-induced loquat fruit lignification that occurs after harvest can be alleviated by heat treatment (HT) applied prior to low temperature storage. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00641DOI Listing

Industrial Riboflavin Fermentation Broths Represent a Diverse Source of Natural Saturated and Unsaturated Lactones.

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

Fermentation broths of Ashbya gossypii from the industrial production of riboflavin emit an intense floral, fruity, and nutty smell. Typical Ehrlich pathway products such as 2-phenylethan-1-ol and 2-/3-methylbutan-1-ol were detected in large amounts, as well as some intensely smelling saturated and unsaturated lactones, e.g. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b01154DOI Listing

Peach carboxylesterase PpCXE1 is associated with catabolism of volatile esters.

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

Peach fruit volatile acetate esters impact consumer sensory preference and contribute to defense against biotic stresses. Previous studies showed that alcohol acyltransferase (AAT) family PpAAT1 is correlated with volatile ester formation in peach fruits. However, fruits also contain carboxylesterase (CXE) enzymes that hydrolyze esters. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b01166
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http://dx.doi.org/10.1021/acs.jafc.9b01166DOI Listing
April 2019
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Efficient Display of Aspergillus niger β-glucosidase on Saccharomyces cerevisiae cell wall for aroma enhancement in wine.

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

The aim of this study was to evaluate the potential application of cell surface-displayed β-glucosidase (BGL) in wine aroma enhancement. Gene cassettes for the surface display of Aspergillus niger BGL were constructed using different promoters (GPD and SED1) and glycosylphosphatidylinositol (GPI) anchoring regions (Sag1, Sed1, and Cwp2). The differences in surface-display cassettes, the tolerance of the displayed BGL to typical winemaking conditions, and the hydrolysis capacity for the liberation of grape aroma glycosides were analyzed. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00863DOI Listing

Triterpenoids from Ganoderma lucidum and their Potential Anti-inflammatory Effects.

J Agric Food Chem 2019 Apr 17. Epub 2019 Apr 17.

Ganoderma lucidum, as food, tea, dietary supplement, and medicine, is widely used in China and Eastern Asian countries. In order to discover its anti-inflammatory constituents and provide some references for the usage of G. lucidum and G. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b01195DOI Listing

Production of l-Ribulose Using an Encapsulated l-Arabinose Isomerase in Yeast Spores.

J Agric Food Chem 2019 Apr 16. Epub 2019 Apr 16.

Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu 214122 , People's Republic of China.

The rare sugar l-ribulose is produced from the abundant sugar l-arabinose by enzymatic conversion. An l-arabinose isomerase (AI) from Geobacillus thermodenitrificans was efficiently expressed and encapsulated in Saccharomyces cerevisiae spores. Deletion of the yeast OSW2 gene, which causes a mild defect in the integrity of the spore wall, substantially improved the activity of encapsulated AI, without damaging its superior enzymatic properties of thermostability, pH tolerance,and resistance toward SDS and proteinase treatments. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b00640
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http://dx.doi.org/10.1021/acs.jafc.9b00640DOI Listing
April 2019
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Maillard-Reacted Whey Protein Isolates and Epigallocatechin Gallate Complex Enhance the Thermal Stability of the Pickering Emulsion Delivery of Curcumin.

J Agric Food Chem 2019 Apr 16. Epub 2019 Apr 16.

In this study, whey protein isolates (WPI), lactose (Lac) Maillard-reacted products, and epigallocatechin gallate (EGCG) complex were used to enhance the thermal stability of the Pickering emulsion delivery of curcumin. Atomic force microscopy (AFM) combined with Fourier transform infrared spectroscopy (FTIR) was employed to study the morphological characteristics and structural changes of WPI-Lac/EGCG nanoparticles. Results proved that WPI-Lac and EGCG were combined by hydrogen bonding and hydrophobic interaction. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00950DOI Listing

Nobiletin Protects Against Systemic Inflammation-Stimulated Memory Impairment via MAPK and NF-κB Signaling Pathways.

J Agric Food Chem 2019 Apr 17. Epub 2019 Apr 17.

Neuroinflammation is intensively demonstrated to be related with various neurodegenerative diseases including Parkinson disease (PD), amyotrophic lateral sclerosis (ALS), and Alzheimer disease (AD). As a natural polymethoxylated flavone, Nobiletin (NOB) is reported to alleviate oxidative stress, insulin resistance, and obesity. In this study, we evaluated the protection effects of NOB on neuroinflammation and memory deficit. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00133DOI Listing

Untargeted and Targeted Fingerprinting of Extra Virgin Olive Oil Volatiles by Comprehensive Two-Dimensional Gas Chromatography with Mass Spectrometry: Challenges in Long-Term Studies.

J Agric Food Chem 2019 Apr 17. Epub 2019 Apr 17.

Comprehensive two-dimensional gas chromatography coupled with mass spectrometric detection (GC×GC-MS) offers an information-rich basis for effective chemical fingerprinting of food. However, GC×GC-MS yields 2D-peak patterns (i.e. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b01661
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http://dx.doi.org/10.1021/acs.jafc.9b01661DOI Listing
April 2019
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A CYP76 oxidation network of abietane diterpenes in Lamiaceae reconstituted in yeast.

J Agric Food Chem 2019 Apr 17. Epub 2019 Apr 17.

Rosemary and sage species from the Lamiaceae contain high amounts of structurally related but diverse abietane diterpenes. A number of substances from this compound family have potential pharmacological activities, and are used in the food and cosmetic industry. This has raised interest in their biosynthesis. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b00714
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http://dx.doi.org/10.1021/acs.jafc.9b00714DOI Listing
April 2019
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Chemical Composition of Commercial Cow's Milk.

J Agric Food Chem 2019 Apr 17. Epub 2019 Apr 17.

Department of Biological Sciences , University of Alberta , Edmonton , Alberta , Canada T6G 2E9.

Bovine milk is a nutritionally rich, chemically complex biofluid consisting of hundreds of different components. While the chemical composition of cow's milk has been studied for decades, much of this information is fragmentary and very dated. In an effort to consolidate and update this information, we have applied modern, quantitative metabolomics techniques along with computer-aided literature mining to obtain the most comprehensive and up-to-date characterization of the chemical constituents in commercial cow's milk. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00204DOI Listing
April 2019
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Biodegrading two pesticide residues in paddy plant and environment by a genetically engineered approach.

J Agric Food Chem 2019 Apr 17. Epub 2019 Apr 17.

Accumulating pesticide (or herbicide) residues in soils become one of the seriously environmental problems. This study focused on identifying the removal of two widely-used pesticides isoproturon (IPU) and acetochlor (ACT) by a genetically developed paddy (or rice) plant overexpressing an uncharacterized glycosyltransferase (IRGT1). IRGT1 conferred plant resistance to isoproturon/acetochlor, which was manifested by attenuated cellular injure and alleviated toxicity of rice growth under isoproturon/acetochlor stress. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b07251DOI Listing

Oxidation of procyanidins with various degrees of condensation: influence on the color deepening phenomenon.

J Agric Food Chem 2019 Apr 16. Epub 2019 Apr 16.

Color deepening in red rice is a known phenomenon that occurs during post-harvest storage. As procyanidins potentially causes this color deepening, we previously subjected synthetic procyanidin B3, a model procyanidin, to chemical oxidation and determined the structures of the products. To further elucidate the effects of various degrees of polymerization on color deepening, in this study we oxidized synthetic procyanidin C2. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b02085DOI Listing

Arsenic in Rice Bran Products: In Vitro Oral Bioaccessibility, Arsenic Transformation by Human Gut Microbiota, and Human Health Risk Assessment.

J Agric Food Chem 2019 Apr 16. Epub 2019 Apr 16.

Despite rice consumption, rice bran as a byproduct of rice milling contains higher arsenic (As). The present study evaluated the metabolic potency of in vitro cultured human colon microbiota toward As from 5 rice bran products with 0.471-1. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b02008DOI Listing

JAFC. Your Window to a Broad Science Community.

Authors:
Thomas F Hofmann

J Agric Food Chem 2019 Jan;67(1):1-4

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http://dx.doi.org/10.1021/acs.jafc.8b06672DOI Listing
January 2019

Non-Coding RNAs as Molecular Targets of Resveratrol Underlying Its Anticancer Effects.

J Agric Food Chem 2019 Apr 16. Epub 2019 Apr 16.

Cancer is a significant disease burden worldwide. Chemotherapy is the mainstay of cancer treatment. Clinically used chemotherapeutic agents may elicit severe side-effects. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b01667
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http://dx.doi.org/10.1021/acs.jafc.9b01667DOI Listing
April 2019
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2.912 Impact Factor

Chemical modulation of alternative splicing for molecular target identification by potential genetic control in agrochemical research.

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

Alternative splicing (AS), the process of removing introns from pre-mRNA and the re-arrangement of exons to produce several types of mature transcripts, is a remarkable step preceding protein synthesis. In particular, it has now been conclusively shown that up to ~95% of genes are alternatively spliced to generate a complex and diverse proteome in eukaryotic organisms. Consequently, AS is one of the determinants of the functional repertoire of cells. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b02086DOI Listing

A rapid and non-destructive method for simultaneous determination of aflatoxigenic fungus and aflatoxin contamination on corn kernels.

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

Conventional methods for detecting aflatoxigenic fungus and aflatoxin contamination are generally time-consuming, sample-destructive and require skilled personnel to perform, making them impossible for large-scale non-destructive screening detection, real-time and on-site analysis. Therefore, the potential of visible-near infrared (Vis-NIR) spectroscopy over the 400-2500 nm spectral range was examined for determination of aflatoxigenic fungus infection and the corresponding aflatoxin contamination on corn kernels, in a rapid and non-destructive manner. The two A. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b01044DOI Listing

The Mushroom Toxins: Chemistry and Toxicology.

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

Mushroom consumption is a global tradition that is still gaining popularity. However, foraging for wild mushrooms and accidental ingestion of toxic mushrooms can result in serious illness and even death. The early diagnosis and treatment of mushroom poisoning are quite difficult, as the symptoms are similar to those caused by common diseases. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00414DOI Listing

In Vitro Digestibility of Galactooligosaccharides: Effect of the Structural Features on Their Intestinal Degradation.

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

Instituto de Investigación en Ciencias de la Alimentación (CIAL) , Consejo Superior de Investigaciones Científicas (CSIC)-Universidad Autónoma de Madrid (UAM) , C/Nicolás Cabrera, 9 , Campus de la Universidad Autónoma de Madrid, 28049 Madrid , Spain.

Small intestinal brush border membrane vesicles from pig were used to digest galactooligosaccharides from lactose (GOS) and from lactulose (OsLu). Dissimilar hydrolysis rates were detected after digestion. Predominant glycosidic linkages and monomeric composition affected the resistance to intestinal digestive enzymes. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00417DOI Listing

Electrospun microbial-encapsulated composite based plasticized seed-coat for rhizosphere stabilization and sustainable production of canola (Brassica napus L.).

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

Plant growth-promoting bacteria show promises in crop production, nevertheless, innovation in their stable delivery is required for practical use by farmers. Herein, the composite of poly(vinyl alcohol)/poly(vinylpyrrolidone) plasticized with glycerol and loaded with the microbial consortium (Bacillus subtilis plus Seratia marcescens) was fabricated and engineered onto canola (Brassica napus L.) seed via electrospinning. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b06505DOI Listing

Using Caffeine and Free Amino Acids to Enhance the Transepithelial Transport of Catechins in Caco-2 Cells.

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

Catechins are well-known to possess healthy promoting functions. The interaction of the catechins with other components in tea could alter its absorption and efflux. This study investigated whether the absorption of catechins is affected by caffeine and amino acids using the Caco-2 monolayer cell model. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b01701DOI Listing

Red wine dryness perception related to physico-chemistry.

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

The responsibility of condensed tannins in the astringency sensation is well known, even though the physical mechanism is unclear. The study's aims are to go deeper on the relationships between tannin structure and red wine dryness, as well as to evaluate the influence of wine matrix and tannin concentration on the interaction with proteins and dryness perception. Condensed tannins were extracted from two red wines (cv. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b01480
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http://dx.doi.org/10.1021/acs.jafc.9b01480DOI Listing
April 2019
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The Relationship between Sensory Attributes and Chemical Composition of Different Mango Cultivars.

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

The present study investigated the relationship between the chemical composition and sensory quality of different mango (Mangifera indica L.) cultivars by multivariate statistical analysis. The results showed that the high hedonic rating of mango was due in part to its flavor profile such as fruity, pineapple, and coconut with sweetness. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b01018
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http://dx.doi.org/10.1021/acs.jafc.9b01018DOI Listing
April 2019
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Phenolic Metabolites in Plasma and Thigh Meat of Chickens Supplemented with Grape Byproducts.

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

Instituto de Ciencia y Tecnología de Alimentos y Nutrición (ICTAN-CSIC) , José Antonio Nováis, 10 , 28040 Madrid , Spain.

Grape byproducts are rich sources of polyphenols with powerful antioxidant and health-promoting effects. The impact of supplementing chicken diets with grape byproducts on plasma and thigh meat concentrations of phenolic metabolites was evaluated by analyzing samples by high-performance liquid chromatography quadrupole time of flight mass spectrometry. Chickens were fed three experimental diets: Control diet, Control+8% grape pomace, and Control+0. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b00222
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http://dx.doi.org/10.1021/acs.jafc.9b00222DOI Listing
April 2019
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Design, Synthesis and Antifungal Activities of Novel Aromatic Carboxamides Containing Diphenylamine Scaffold.

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

a series of novel N-(2-(phenylamino)-4-fluorophenyl)-pyrazole-4-carboxamides 1-15 and aromatic carboxamides with diphenylamine scaffold 16-29 were designed, synthesized and evaluated for their antifungal activities. In vitro experiments showed that compound 6 (EC50 = 0.03 mg/L) was superior to bixafen (EC50 = 0. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00151DOI Listing

Stability of the Metabolite Signature Resulting from the MIPS1 Mutation in Low Phytic Acid Soybean (Glycine max L. Merr.) Mutants upon Cross-breeding.

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

The low phytic acid (lpa) soybean (Glycine max L. Merr.) mutant Gm-lpa-TW 1 M, resulting from a 2 bp deletion in GmMIPS1, was crossed with a commercial cultivar. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00817DOI Listing

Potential Link between Gut Microbiota and Deoxynivalenol-Induced Feed Refusal in Weaned Piglets.

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

Department of Animal Nutrition and Feed Science, College of Animal Science and Technology , Huazhong Agricultural University , Wuhan , Hubei 430070 , China.

This study investigated the potential link between gut microbiota and deoxynivalenol (DON)-induced feed refusal. A total of 24 barrows were randomly divided into one of three diets containing 0.61 (control diet), 1. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b01037DOI Listing

A triple quadrupole and a hybrid quadrupole orbitrap mass spectrometer in comparison for polyphenol quantitation.

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

Liquid chromatography coupled to low resolution mass spectrometry (LRMS) has historically been a popular approach for compound quantitation. Recently, high resolution mass spectrometry (HRMS) technical developments led to the introduction of new approaches for quantitative analysis. Whereas the performances of HRMS have been largely assessed for qualitative purposes, there are still questions about its suitability for quantitative analysis. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b07163DOI Listing

Isolation and Characterization of New Sixteen-membered Macrolides from the aveA3 Gene Replacement Mutant Strain Streptomyces avermitilis TM24 with Acaricidal and Nematicidal Activities.

J Agric Food Chem 2019 Apr 11. Epub 2019 Apr 11.

Polyketides represent an important class of biologically active and structurally diverse compounds found in nature. They are biosynthesized from acyl CoA precursors by polyketide synthases (PKSs). The use of combinatorial biosynthesis to form hybrid PKSs is considered as an excellent approach for the development of novel polyketides. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00079DOI Listing

Anti-inflammatory and Anti-proliferative Prenylated Isoflavone Derivatives from the Fruits of Ficus carica.

J Agric Food Chem 2019 Apr 11. Epub 2019 Apr 11.

Ficus carica is an Asian species of flowering plant belonging to the genus Ficus of the family Moraceae, native to Western Asia and the Middle East. Its fruits, usually known as common fig or fig, have been consumed as a very popular health-promoting fruit worldwide since ancient times. To investigate the potential health-promoting chemical constituents of the fruits of F. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00865DOI Listing

Biochemical and Molecular Factors Governing Peel-Color Development in 'Ora' and 'Shani' Mandarins.

J Agric Food Chem 2019 Apr 16. Epub 2019 Apr 16.

Newe Ya'ar Research Center , ARO , Ramat Yishay 30095 , Israel.

To identify factors governing peel-color development in mandarins, we examined carotenoid content and composition and the expression of carotenoid-related genes during four stages of ripening (i.e., green, breaker, yellow, and orange) in two varieties: 'Ora', which has orange fruit, and 'Shani', which has orange-reddish fruit. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00669DOI Listing

Enhancement of glucosinolate production in watercress (Nasturtium officinale) hairy roots by overexpressing cabbage transcription factors.

J Agric Food Chem 2019 Apr 11. Epub 2019 Apr 11.

Glucosinolates are secondary metabolites that play important roles in plant defense and human health, as their production in plants is enhanced by overexpressing transcription factors. Here, four cabbage transcription factors (IQD1-1, IQD1-2, MYB29-1, and MYB29-2) affecting genes in both aliphatic and indolic glucosinolates biosynthetic pathways and increasing glucosinolates accumulation were overexpressed in watercress. Five IQD1-1, six IQD1-2, five MYB29-1, six MYB29-2, and one GUS hairy root lines were created. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00440DOI Listing

Comparative transcriptome analysis of celery leaf blades identified an R2R3 MYB transcription factor that regulates apigenin metabolism.

J Agric Food Chem 2019 Apr 10. Epub 2019 Apr 10.

Apigenin has been proven to possess many pharmacological properties, but mechanism of regulation of apigenin biosynthesis in plants remains unclear. Apigenin is the main flavonoid in celery and is mainly accumulated in the middle stage of leaf blade development. In this study, comparative transcriptomic analysis revealed a large number of structural genes and transcription factor genes that may be involved in the apigenin metabolic pathway. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b01052DOI Listing

Differential Catabolism of an Anthocyanin-Rich Elderberry Extract by Three Gut Microbiota Bacterial Species.

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

Department of Bacteriology , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States.

Elderberries are good sources of anthocyanins, which are poorly absorbed in the upper gastrointestinal tract but extensively transformed into phenolic metabolites at the colonic level. Because different gut microbiota strains have different metabolism, the catabolism of anthocyanins may lead to interindividual differences in metabolite production. In this work, an anthocyanin-rich elderberry extract was incubated with three single gut microbial strains ( Enterobacter cancerogenous, Bifidobacterium dentium, and Dorea longicatena) up to 4 days, to assess differences in their phenolic metabolism. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b00247
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http://dx.doi.org/10.1021/acs.jafc.9b00247DOI Listing
April 2019
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Investigations on the Maillard Reaction in Sesame ( Sesamum indicum L.) Seeds Induced by Roasting.

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

Department of Food Engineering , Hacettepe University , 06800 Beytepe , Ankara , Turkey.

This study investigated the formation of Maillard reaction products in sesame seeds under different roasting conditions. Sesame seeds were roasted at 150, 180, 200, and 220 °C for 10 min, and thermal process contaminants including 5-hydroxymethylfurfural, acrylamide, furan, and dicarbonyl compounds (1-deoxyglucosone, 3-deoxyglucosone, methylglyoxal, and diacetyl) together with glycation markers namely N-ε-fructosyllysine, N-ε-carboxymethyllysine, and N-ε-carboxyethyllysine, were monitored. Roasting induced the formation of 5-hydroxymethylfurfural, acrylamide, and dicarbonyl compounds, except furan, significantly ( p < 0. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b01413DOI Listing

A Review on Bile Acids: Effects of the Gut Microbiome, Interactions with Dietary Fiber, and Alterations in the Bioaccessibility of Bioactive Compounds.

J Agric Food Chem 2019 Apr 10. Epub 2019 Apr 10.

Bile acids are cholesterol-derived steroid molecules that serve various metabolic functions, particularly in the digestion of lipids. Gut microbes produce unconjugated and secondary bile acids through deconjugation and dehydroxylation reactions respectively. Alterations in the gut microbiota have profound effects on bile acid metabolism, which can result in the development of gastrointestinal and metabolic diseases. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b07306DOI Listing

Generation of α-Diketones and 4-Hydroxy-2,5-dimethyl-3(2 H)-furanone upon Coffee Roasting-Impact of Roast Degree on Reaction Pathways.

J Agric Food Chem 2019 Apr 10. Epub 2019 Apr 10.

Nestlé Product Technology Centre Orbe , Nestec, Limited , CH-1350 Orbe , Switzerland.

The formation pathways of α-diketones (2,3-butanedione and 2,3-pentanedione) and 4-hydroxy-2,5-dimethyl-3(2 H)-furanone (HDMF) upon coffee roasting were investigated in a kinetic study applying labeled and unlabeled sucrose (CAMOLA approach) in biomimetic in-bean experiments. The results highlighted that not only did the contribution of sucrose to the level of α-diketones in roasted coffee change with the roasting degree but also the portion of the individual reaction pathways. At early roasting stages, 2,3-butanedione was formed from sucrose mainly via the intact sugar skeleton, whereas from the middle of the roasting course, the formation foremost occurred from sugar fragments, primarily by C/C and C/C recombinations. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00770DOI Listing

Two Pairs of Isomerically New Phenylpropanoidated Epicatechin Gallates with Neuroprotective Effects on HO-Injured SH-SY5Y Cells from Zijuan Green Tea and Their Changes in Fresh Tea Leaves Collected from Different Months and Final Product.

J Agric Food Chem 2019 Apr 17. Epub 2019 Apr 17.

Natural Products Laboratory, State Key Laboratory of Tea Plant Biology and Utilization , Anhui Agricultural University , Hefei , Anhui Province 230036 , China.

Zijuan tea ( Camellia sinensis var. assamica), an anthocyanin-rich cultivar with purple leaves, is a valuable material for manufacturing tea with unique color and flavor. In this paper, four new phenylpropanoid substituted epicatechin gallates (pECGs), Zijuanins A-D (1-4), were isolated from Zijuan green tea by different column chromatography. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b01365
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http://dx.doi.org/10.1021/acs.jafc.9b01365DOI Listing
April 2019
3 Reads

Hydrolysis and Transport of Egg White-Derived Peptides in Caco-2 Cell Monolayers and Everted Rat Sacs.

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

Jilin Provincial Key Laboratory of Nutrition and Functional Food, College of Food Science and Engineering , Jilin University , Changchun , Jilin 130062 , People's Republic of China.

The objective of this paper was to investigate the hydrolysis and transepithelial transport of egg white peptides in Caco-2 cell monolayers and everted rat sacs. Results showed that egg white peptides had higher permeability but lower degradation in Caco-2 cell monolayers than found for everted rat sacs. Peptides LGAKDSTRT, DGSRQPVDN, VNDLQGKTS, and GKKDPVLKD were identified from not only the basolateral (BL) side of Caco-2 cell monolayers but also the serous side of everted rat sacs, suggesting that these four peptides could be transported intact in both model systems. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b01904DOI Listing
April 2019
3 Reads

Identification of Characterizing Aroma Components of Roasted Chicory "Coffee" Brews.

J Agric Food Chem 2019 Apr 10. Epub 2019 Apr 10.

The roasted and ground root of the chicory plant (Cichorium intybus), often referred to as chicory coffee, has served as a coffee surrogate for well of over two centuries and is still in common use today. Volatile components of roasted chicory brews were identified by direct solvent extraction and solvent-assisted flavor evaporation (SAFE) combined with gas chromatography-olfactometry (GC-O), aroma extract dilution analysis (AEDA) and gas chromatography-mass spectrometry (GC-MS). Forty-six compounds were quantitated by stable isotope dilution analysis (SIDA) and internal standard methods, and odor-activity values (OAVs) were calculated. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00776DOI Listing

Soybean Peptides Exert Multifunctional Bioactivity Modulating 3-Hydroxy-3-Methylglutaryl-CoA Reductase and Dipeptidyl Peptidase-IV Targets in Vitro.

J Agric Food Chem 2019 Apr 17. Epub 2019 Apr 17.

Department of Pharmaceutical Sciences , University of Milan , 20133 Milan , Italy.

This study was aimed at evaluating the cellular mechanism through which peptic (P) and tryptic (T) soybean hydrolysates modulate the targets involved in hypocholesterolemic pathways in HepG2 and antidiabetic pathways in Caco-2 cells. Both hydrolysates (tested in the concentration range of 0.5-2. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b01199DOI Listing

Sestrin2 Negatively Regulates Casein Synthesis through the SH3BP4-mTORC1 Pathway in Response to AA Depletion or Supplementation in Cow Mammary Epithelial Cells.

J Agric Food Chem 2019 Apr 17. Epub 2019 Apr 17.

State Key Laboratory of Animal Nutrition , Institute of Animal Sciences, Chinese Academy of Agricultural Sciences , Beijing 100193 , P. R. China.

Sestrin2 (SESN2) negatively regulates the mammalian target of rapamycin complex 1 (mTORC1) pathway and casein synthesis in response to amino acid (AA) depletion in cow mammary epithelial cells (CMECs); however, the underlying mechanism is unclear. In the current study, the regulation of SESN2 on AA-mediated β-casein (CSN2) synthesis in CMECs and its mechanism were investigated. Overexpression and silencing of SESN2 demonstrated that SESN2 negatively regulated AA-mediated expression of CSN2 and mTORC1 pathway. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b00716
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http://dx.doi.org/10.1021/acs.jafc.9b00716DOI Listing
April 2019
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Reducing Allergenicity to Arginine Kinase from Mud Crab Using Site-directed Mutagenesis and Peptide Aptamers.

J Agric Food Chem 2019 Apr 9. Epub 2019 Apr 9.

The mud crab (Scylla paramamosain) is widely consumed but can cause a severe food allergic reaction. In order to reduce allergenicity to arginine kinase (AK), site-directed mutagenesis was used to destroy disulfide bonds or mutate critical amino acids of conformational epitopes. Three hypoallergenic mutant AKs (mAK1-3) were generated, with the immunoreactivity decreasing by 54. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b00608
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http://dx.doi.org/10.1021/acs.jafc.9b00608DOI Listing
April 2019
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Encapsulation of Mentha pulegium essential oil in yeast cell microcarriers: an approach to environmentally friendly pesticides.

J Agric Food Chem 2019 Apr 9. Epub 2019 Apr 9.

A green approach for the encapsulation of Mentha pulegium essential oil in commercial baker's yeast and its evaluation as pesticide against the insect pest Myzus persicae are presented. On treating aqueous yeast cell dispersion with the essential oil, formation of EO-loaded microparticles about 9 μm is observed, with loading capacity ranging from 29 - 36%, depending on the encapsulation conditions. The thermal properties of the microparticles were characterized using DSC and TGA, confirming the protection of the essential oil from the cells. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.8b05149
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http://dx.doi.org/10.1021/acs.jafc.8b05149DOI Listing
April 2019
5 Reads

IP3 mediates NO-induced chilling tolerance and defense response in postharvest peach fruit.

J Agric Food Chem 2019 Apr 9. Epub 2019 Apr 9.

The function of inositol 1,4,5-trisphosphate (IP3) on nitric oxide (NO)-induced chilling tolerance and defense response in postharvest peach fruit was explored. The postharvest fruit were treated with sodium nitroprusside (SNP) (exogenous NO donor), cPTIO (NO scavenger) and neomycin (IP3 inhibitor). It turned out that SNP treatment alleviated chilling injury (CI), and induced NO accumulation in postharvest peach fruit. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00153DOI Listing

Short-term responses of apple fruit to partial re-oxygenation during extreme hypoxic storage conditions.

J Agric Food Chem 2019 Apr 9. Epub 2019 Apr 9.

The short-term (24h) responses of apple fruit (cv 'Granny Smith') to the shift of oxygen concentration from 0.4 to 0.8 kPa, a protocol applied in Dynamic Controlled Atmosphere (DCA) storage technique, have been studied. Read More

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http://dx.doi.org/10.1021/acs.jafc.9b00036DOI Listing
April 2019
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Polarity and Molecular Weight of Compost-Derived Humic Acids Impact Bio-dechlorination of Pentachlorophenol.

J Agric Food Chem 2019 Apr 17. Epub 2019 Apr 17.

State Key Laboratory of Environmental Criteria and Risk Assessment , Chinese Research Academy of Environmental Sciences , Beijing 100012 , China.

Compost-derived humic acids (HAs) as cheap soil conditioners have potential to facilitate pentachlorophenol (PCP) bio-dechlorination but lack proof and studies. To clarify this, PCP bio-dechlorination mediated by compost-derived HAs under Fe(III) reduction conditions was investigated. Reverse phase high-performance liquid chromatography and high-performance size exclusion chromatography were employed to identify the functional components within compost-derived HAs. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b05864DOI Listing

Hypoglycemic and Hypolipidemic Effects of Glucomannan Extracted from Konjac on Type 2 Diabetic Rats.

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

State Key Laboratory of Food Science and Technology, China-Canada Joint Laboratory of Food Science and Technology (Nanchang) , Nanchang University , 235 Nanjing East Road , Nanchang , Jiangxi 330047 , People's Republic of China.

Diabetes and its complications are one of the most concerned metabolic diseases worldwide and threaten human health severely. Hypoglycemic and hypolipidemic effects of glucomannan extracted from konjac on high-fat diet and streptozocin-induced type 2 diabetic rats were evaluated in this study. Administration of konjac glucomannan significantly decreased the levels of fasting blood glucose, serum insulin, glucagon-like peptide 1, and glycated serum protein. Read More

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http://pubs.acs.org/doi/10.1021/acs.jafc.9b01192
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http://dx.doi.org/10.1021/acs.jafc.9b01192DOI Listing
April 2019
2 Reads