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You searched for: Journal name Journal of agricultural and food chemistry Remove constraint Journal name: Journal of agricultural and food chemistry Publication year rev 7990-2010 Remove constraint Publication year rev: 7990-2010 Source 2010 v.58 no.8 Remove constraint Source: 2010 v.58 no.8
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1. Analysis of Reaction Products of Food Contaminants and Ingredients: Bisphenol A Diglycidyl Ether (BADGE) in Canned Foods

Author:
Coulier, Leon; Bradley, Emma L.; Bas, Richard C.; Verhoeckx, Kitty C.M.; Driffield, Malcolm; Harmer, Nick; Castle, Laurence
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4873–4882
ISSN:
0021-8561
Subject:
model food systems; packaging materials; food analysis; coatings; chemical reactions; packaging materials migration; cans; food composition; canned foods; cysteine
Abstract:
... Bisphenol A diglycidyl ether (BADGE) is an epoxide that is used as a starting substance in the manufacture of can coatings for food-contact applications. Following migration from the can coating into food, BADGE levels decay and new reaction products are formed by reaction with food ingredients. The significant decay of BADGE was demonstrated by liquid chromatographic (LC) analysis of foodstuffs, ...
DOI:
10.1021/jf904160a
PubMed:
20334396

2. Antioxidant Activity of Wines Determined by a Polarographic Assay Based on Hydrogen Peroxide Scavenge

Author:
Gorjanovic, Stanislava Z.; Novakovic, Miroslav M.; Potkonjak, Nebojsa I.; Suznjevic, Desanka Z.
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4626–4631
ISSN:
0021-8561
Subject:
antioxidant activity; wines; wine quality; food analysis; food composition; assays; hydrogen peroxide; phenolic compounds
Abstract:
... Antioxidant (AO) activity of various red and white wines of different origin as well as some individual phenolic compounds present in wine has been assessed using a polarographic assay. Direct current polarography has been used to survey hydrogen peroxide scavenge (HPS) upon gradual addition of tested samples. Results expressed as reciprocal value of wine volume required for 50% decrease of anodic ...
DOI:
10.1021/jf100022e
PubMed:
20302358

3. Antioxidant Capacity, Phenolic Content, and Profiling of Phenolic Compounds in the Seeds, Skin, and Pulp of Vitis rotundifolia (Muscadine Grapes) As Determined by HPLC-DAD-ESI-MSn

Author:
Sandhu, Amandeep K.; Gu, Liwei
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4681–4692
ISSN:
0021-8561
Subject:
phenolic compounds; grape seeds; fruit pulp; grapes; Vitis rotundifolia; high performance liquid chromatography; mass spectrometry; food analysis; fruit composition; fruit quality
Abstract:
... The objective of this study was to determine and compare the total phenolic content and antioxidant capacity in the seeds, skin, and pulp of eight cultivars of Florida-grown muscadine grapes and to identify the phenolic compounds in these respective portions. Total phenolic contents were determined colorimetrically using Folin-Ciocalteu reagent, and antioxidant capacity was determined by oxygen ra ...
DOI:
10.1021/jf904211q
PubMed:
20334341

4. Antioxidant and Angiotensin Converting Enzyme-Inhibitory Properties of a Flaxseed Protein-Derived High Fischer Ratio Peptide Mixture

Author:
Udenigwe, Chibuike C.; Aluko, Rotimi E.
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4762–4768
ISSN:
0021-8561
Subject:
antioxidants; peptidyl-dipeptidase A; enzyme inhibition; enzyme inhibitors; linseed; oilseed protein; food analysis; food composition; peptides; mixtures; protein hydrolysates; enzymatic hydrolysis; functional foods
Abstract:
... Hydrolysis of flaxseed proteins using thermolysin and pronase followed by mixing with activated carbon, centrifugation and filtration yielded a filtrate (peptide mixture) with a Fischer ratio (branched-chain amino acids/aromatic amino acids) of 23.65 and a phenylalanine + tyrosine content of 1.11%. Gel permeation chromatography showed that the flaxseed peptide sample contained mainly low molecular ...
DOI:
10.1021/jf100149w
PubMed:
20218606

5. Applications of Direct Analysis in Real Time Mass Spectrometry (DART-MS) in Allium Chemistry. 2-Propenesulfenic and 2-Propenesulfinic Acids, Diallyl Trisulfane S-Oxide, and Other Reactive Sulfur Compounds from Crushed Garlic and Other Alliums

Author:
Block, Eric A.; Dane, A. John; Thomas, Siji; Cody, Robert B.
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4617–4625
ISSN:
0021-8561
Subject:
organic sulfur compounds; food analysis; crushing; acids; garlic; Allium; equipment performance; food composition; mass spectrometry; detection
Abstract:
... Through the use of direct analysis in real time mass spectrometry (DART-MS), 2-propenesulfenic acid, an intermediate long postulated as being formed when garlic (Allium sativum) is crushed, has been detected for the first time and determined by mass spectrometric methods to have a half-life of <1 s at room temperature. Two other key intermediates, 2-propenesulfinic acid and diallyl trisulfane S-ox ...
DOI:
10.1021/jf1000106
PubMed:
20225897

6. Benzophenones and Biflavonoids from Garcinia livingstonei Fruits

Author:
Yang, Hui; Figueroa, Mario; To, Satoshi; Baggett, Scott; Jiang, Bei; Basile, Margaret J.; Weinstein, Bernard; Kennelly, Edward J.
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4749–4755
ISSN:
0021-8561
Subject:
Garcinia; small fruits; fruit extracts; food analysis; fruit composition; cytotoxicity; human cell lines; functional foods
Abstract:
... A series of 13 known compounds, including seven benzophenones [guttiferone A (1), guttiferone K (2), xanthochymol (3), guttiferone E (4), cycloxanthochymol (5), isoxanthochymol (6), and gambogenone (7)], five biflavonoids [amentoflavone (8), 3,8′′-biapigenin (9), (+)-volkensiflavone (10), (+)-morelloflavone (11), and (+)-fukugiside (12)], and the xanthone derivative alloathyriol (13), were identif ...
DOI:
10.1021/jf9046094
PubMed:
20345100

7. Comparison between Methods using Copper, Lanthanum, and Colorimetry for the Determination of the Cation Exchange Capacity of Plant Cell Walls

Author:
Wehr, J. Bernhard; Blamey, F. Pax C.; Menzies, Neal W.
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4554–4559
ISSN:
0021-8561
Subject:
seed germination; chemical composition; colorimetry; seeds; cation exchange capacity; copper; lanthanum; cell walls; chemical analysis; equipment performance; dyes; roots; shoots
Abstract:
... The determination of the cation exchange capacity (CEC) of plant cell walls is important for many physiological studies. We describe the determination of cell wall CEC by cation binding, using either copper (Cu) or lanthanum (La) ions, and by colorimetry. Both cations are strongly bound by cell walls, permitting fast and reproducible determinations of the CEC of small samples. However, the dye bin ...
DOI:
10.1021/jf100097k
PubMed:
20345166

8. Determination of Reduced Cysteine in Oenological Cell Wall Fractions of Saccharomyces cerevisiae

Author:
Tirelli, Antonio; Fracassetti, Daniela; De Noni, Ivano
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4565–4570
ISSN:
0021-8561
Subject:
cysteine; winemaking; cell walls; Saccharomyces cerevisiae; redox potential; grape must; wine yeasts; Maillard reaction; protein content; wine quality; thiols; odors
Abstract:
... Compounds containing cysteine residues, such as glutathione, can affect the redox potential of must and wine by reduction of o-quinones and hydrogen peroxide. The oenological yeast cell wall fractions contain cysteine residues in their protein structure, and they could affect both oxidative and odor properties of wine. An analytical approach based on the derivatization of cysteinyl residues with p ...
DOI:
10.1021/jf904047u
PubMed:
20359223

9. Direct Chiral Resolution of Metalaxyl and Metabolite Metalaxyl Acid in Aged Mobile Phases: The Role of Trace Water

Author:
Zhang, Xiaoxiang; Xia, Tingting; Chen, Jingwen; Huang, Liping; Cai, Xiyun
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 5004–5010
ISSN:
0021-8561
Subject:
phase transition; metalaxyl; acids; metabolites; pollutants; pesticide residues; stereoisomers
Abstract:
... The separation of chiral transformation products greatly complements the understanding of the stereochemistry of chiral pollutants. In this study, direct enantiomeric resolution of metalaxyl and its main degradation product metalaxyl acid, often co-occurring in the environment, was carried out in normal-phase high-performance liquid chromatography with a Chiralcel OJ-H column. (R)-Metalaxyl acid a ...
DOI:
10.1021/jf9044342
PubMed:
20302379

10. Evaluation of the Impacts of Different Nuclear DNA Content in the Hull, Endosperm, and Embryo of Rice Seeds on GM Rice Quantification

Author:
Liu, Donger; Shen, Jie; Yang, Litao; Zhang, Dabing
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4582–4587
ISSN:
0021-8561
Subject:
DNA; hulls; endosperm; embryo (plant); genetically modified foods; transgenic plants; quantitative analysis; accuracy; food analysis; food composition; Oryza sativa; rice; food contamination; nuclear genome
Abstract:
... Rice (Oryza sativa) is a main staple food in the world, and several genetically modified (GM) rice events have been approved for commercialization. To accurately quantify GM contents in rice derived products, we have evaluated the variation of seed DNA density and nuclear DNA content in the hull, endosperm, and embryo of rice seeds from 19 cultivars, as well as their impacts on GM rice quantificat ...
DOI:
10.1021/jf9044233
PubMed:
20222712

11. Heterologous Expression and Biochemical Characterization of α-Glucosidase from Aspergillus niger by Pichia pastroris

Author:
Chen, Dong-Li; Tong, Xing; Chen, Shang-Wei; Chen, Sheng; Wu, Dan; Fang, Shu-Guang; Wu, Jing; Chen, Jian
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4819–4824
ISSN:
0021-8561
Subject:
model food systems; Aspergillus niger; Komagataella pastoris; alpha-glucosidase; gene expression; molecular cloning; enzyme activity
Abstract:
... The aglu of Aspergillus niger encodes the pro-protein of α-glucosidase, and the mature form of wild-type enzyme is a heterosubunit protein. In the present study, the cDNA of α-glucosidase was cloned and expressed in Pichia pastoris strain KM71. The activity of recombinant enzyme in a 3 L fermentor reached 2.07 U/mL after 96 h of induction. The recombinant α-glucosidase was able to produce oligoiso ...
DOI:
10.1021/jf1000502

12. Inbred Chinese Wuzhishan (WZS) Minipig Model for Soybean Glycinin and β-Conglycinin Allergy

Author:
Huang, Qiong; Xu, Haibin; Yu, Zhou; Gao, Peng; Liu, Shan
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 5194–5198
ISSN:
0021-8561
Subject:
inbred lines; inbreeding; miniature swine; animal models; soybeans; food allergies; glycinin; beta-conglycinin; allergenicity
Abstract:
... Validated murine models have been built to assess the potential allergenicity of novel proteins. Large animals, such as pigs, share more similarities to humans in physiology and immunology than murine. Among Chinese minipigs, Wuzhishan (WZS) minipigs have the highest inbreeding coefficient, more stable heredity, and less variability, which were gastrically sensitized and excitated with diets conta ...
DOI:
10.1021/jf904536v

13. Isoliquiritigenin Suppresses the Toll−Interleukin-1 Receptor Domain-Containing Adapter Inducing Interferon-β (TRIF)-Dependent Signaling Pathway of Toll-Like Receptors by Targeting TBK1

Author:
Park, Se-jeong; Youn, Hyung-Sun
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4701–4705
ISSN:
0021-8561
Subject:
flavonoids; interleukin-1; receptors; interferons; biochemical pathways; signal transduction; gene expression; genes; inflammation; cell culture; licorice; functional foods
Abstract:
... Toll-like receptors (TLRs) play an important role in induction of innate immune responses. TLRs can trigger the activation of myeloid differential factor 88 (MyD88)- and Toll−interleukin-1 receptor domain-containing adapter inducing interferon-β (TRIF)-dependent downstream signaling pathways. Expression of more than 70% of lipopolysaccharide (LPS)-induced target genes is mediated through a TRIF-de ...
DOI:
10.1021/jf100484r

14. Kaempferol Complexation in Cyclodextrins at Basic pH

Author:
Mercader-Ros, Maria Teresa; Lucas-Abellan, Carmen; Gabaldon, Jose Antonio; Fortea, Maria Isabel; Martinez-Cacha, Adela; Nunez-Delicado, Estrella
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4675–4680
ISSN:
0021-8561
Subject:
kaempferol; pH; cyclodextrins; model food systems; chemical analysis; chemical composition; fluorescence emission spectroscopy
Abstract:
... The complexation of kaempferol with cyclodextrins (CDs) (β-, G2-β-, and HP-β-CDs) in basic medium was studied, and the complexation constants (Kc) were calculated by using enzymatic, solubility, and fluorometric methods. This is the first time that a decrease in fluorescence has been observed as result of the analyte complexation by CDs. The highest Kc value for kaempferol complexation was obtaine ...
DOI:
10.1021/jf904218j
PubMed:
20329774

15. Lignans from the Tuber-barks of Colocasia antiquorum var. esculenta and Their Antimelanogenic Activity

Author:
Kim, Ki Hyun; Moon, Eunjung; Kim, Sun Yeou; Lee, Kang Ro
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4779–4785
ISSN:
0021-8561
Subject:
melanization; cell culture; plant extracts; melanin; tubers; lignans; cell lines; bark; Colocasia esculenta
Abstract:
... Colocasia antiquorum var. esculenta, a variant of C. antiquorum, commonly known as “Imperial Taro”, is an edible vegetable in many tropical and subtropical regions of the world. This study with the aim of evaluating the potential of C. antiquorum var. esculenta as a functional food with a depigmenting effect resulted in the identification of a new sesquilignan, named colocasinol A (1), and a new a ...
DOI:
10.1021/jf100323q
PubMed:
20359228

16. Liquid Chromatographic Determination of Endogenous Phytohormones in Vegetable Samples Based on Chemical Derivatization with 6-Oxy(acetylpiperazine) Fluorescein

Author:
Chen, Hao; Zhang, Zi-Xing; Zhang, Gui-Min; Guo, Xiao-Feng; Zhang, Hua-Shan; Wang, Hong
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4560–4564
ISSN:
0021-8561
Subject:
plant hormones; fluorescent labeling; vegetables; endogenous sources; liquid chromatography; chemical treatment
Abstract:
... In phytohormone analysis, mass spectrometry (MS)-based methods are primary and powerful tools. However, complex sample preparation and high cost are problems for their application. As a complement for MS-based methods, a new fluorescent labeling reagent for carboxylic acids, 6-oxy(acetylpiperazine) fluorescein (APF), has been used for the determination of endogenous phytohormones, including indole ...
DOI:
10.1021/jf100581u
PubMed:
20356302

17. On the Autoxidation of Bitter-Tasting Iso-α-acids in Beer

Author:
Intelmann, Daniel; Hofmann, Thomas
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 5059-5067
ISSN:
0021-8561
Subject:
bitterness; food analysis; food storage; storage quality; autoxidation; taste; food composition; degradation; beers
Abstract:
... The iso-α-acids, the major contributor to bitter beer taste, is well-known to strongly degrade during beer aging. The storage of beer in brown glass bottles revealed a strong depletion of the trans-configured isomers in a highly specific manner, whereas the corresponding cis-iso-α-acids seemed to be hardly affected. In comparison, storage of beer in polyethylene terephthalate bottles, which are kn ...
DOI:
10.1021/jf100083e

18. Phenolic Compounds in Cherry (Prunus avium) Heartwood with a View to Their Use in Cooperage

Author:
Sanz, Miriam; Cadahia, Estrella; Esteruelas, Enrique; Munoz, Angel M.; Fernández de Simón, Brígida; Hernandez, Teresa; Estrella, Isabel
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4907–4914
ISSN:
0021-8561
Subject:
phenolic compounds; heartwood; wood extractives; Prunus avium; chemical analysis; chemical composition; barrels; toasting; wood chemistry
Abstract:
... The phenolic and tannic composition of heartwood extracts from Prunus avium, commonly known as cherry tree, before and after toasting in cooperage were studied using HPLC-DAD and HPLC-DAD/ESI-MS. Nonflavonoid (16 compounds) and flavonoid (27 compounds) polyphenols were identified, 12 of them in only a tentative way. The nonflavonoids found were lignin constituents, and their pattern is different c ...
DOI:
10.1021/jf100236v
PubMed:
20302370

19. Physical and Chemical Changes during the Maturation of Gordal Sevillana Olives (Olea europaea L., cv. Gordal Sevillana)

Author:
Menz, Garry; Vriesekoop, Frank
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4934–4938
ISSN:
0021-8561
Subject:
harvesting; plant growth; food analysis; fatty acid composition; olives; maturity stage; color; food composition; Olea europaea
Abstract:
... A series of physical and chemical changes occur as olives mature on the tree, and these changes are important for the production of oil and table olives. The aim of this study was to increase the understanding of the maturation process of Gordal Sevillana olives, to optimize harvest timing, and to determine the most appropriate harvesting and post-harvesting processing methods. During maturation, ...
DOI:
10.1021/jf904311r
PubMed:
20355715

20. Profiling and Accurate Quantification of Rubus Ellagitannins and Ellagic Acid Conjugates Using Direct UPLC-Q-TOF HDMS and HPLC-DAD Analysis

Author:
Gasperotti, Mattia; Masuero, Domenico; Vrhovsek, Urska; Guella, Graziano; Mattivi, Fulvio
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4602–4616
ISSN:
0021-8561
Subject:
quantitative analysis; small fruits; Rubus; food analysis; fruit extracts; high performance liquid chromatography; ellagic acid; tannins; fruit composition; accuracy
Abstract:
... Accurate quantification and structural characterization of ellagitannins and ellagic acid conjugates in food, beverages, and food supplements are essential starting points for studying their effect on human health. However, accuracy is hindered both by the lack of pure standard compounds and by methods that maintain the compounds in their native form, avoiding any chemical modification of the stru ...
DOI:
10.1021/jf904543w
PubMed:
20353173