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You searched for: Journal Journal of agricultural and food chemistry Remove constraint Journal: Journal of agricultural and food chemistry Publication Year 2001 Remove constraint Publication Year: 2001 Source 2001 v.49 no.12 Remove constraint Source: 2001 v.49 no.12
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1. Absorption and urinary excretion of (-)-epicatechin after administration of different levels of cocoa powder or (-)-epicatechin in rats

Author:
Baba, S.; Osakabe, N.; Natsume, M.; Muto, Y.; Takizawa, T.; Terao, J.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 6050-6056
ISSN:
0021-8561
Subject:
cocoa products; powders; oral administration; epicatechin; bioavailability; intestinal absorption; excretion; urine; metabolites; rats
Abstract:
... (-)-Epicatechin is a major polyphenol component of cocoa powder. The absorption and urinary excretion of (-)-epicatechin following administration of different levels of either cocoa powder (150, 750, and 1500 mg/kg) or (-)-epicatechin (1, 5, and 10 mg/kg) were evaluated in rats. Both the sum of plasma (-)-epicatechin metabolites at 1 h postadministration and peak plasma concentrations increased in ...
DOI:
10.1021/jf010965h
PubMed:
11743807

2. Action of protein-glutaminase on alpha-lactalbumin in the native and molten globule states

Author:
Gu, Y.S.; Matsumura, Y.; Mori, T.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5999-6005
ISSN:
0021-8561
Subject:
molecular conformation; enzyme activity; glutaminase; bacteria; Chryseobacterium proteolyticum; protein tertiary structure; lactalbumin
Abstract:
... The action of a novel protein-glutaminase from microorganisms on alpha-lactalbumin was investigated. When alpha-lactalbumin in the native state was incubated with protein-glutaminase, the deamidation proceeded gradually, i.e., the deamidation degree increased to 20% and 55% after 4 and 24 h, respectively. The transformation of alpha-lactalbumin from the native state to the molten globule state cau ...
DOI:
10.1021/jf010287z
PubMed:
11743799

3. Analysis of physicochemical factors related to the automatic pellicle removal in Korean chestnut (Castanea crenata)

Author:
Hwang, J.Y.; Hwang, I.K.; Park, J.B.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 6045-6049
ISSN:
0021-8561
Subject:
chemical composition; Castanea crenata; sugars; proanthocyanidins; peeling; varieties; tannins; firmness; color; chestnuts; shelling; hulls
Abstract:
... Analyses were carried out for condensed tannin content, soluble sugar content, color, firmness, and peeling ratio of the pellicle of 14 varieties of Korean chestnut. The correlation between these physicochemical components and the peeling ratio was measured. The total soluble sugar content ranged from 4.20 to 11.83%. Condensed tannin contents in the inner and outer chestnut shells were 7.83-71.42% ...
DOI:
10.1021/jf010744b
PubMed:
11743806

4. Analysis of the effects of heat treatment on gliadin immunochemical quantification using a panel of anti-prolamin antibodies

Author:
Rumbo, M.; Chirdo, F.G.; Fossati, C.A.; Anon, M.C.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5719-5726
ISSN:
0021-8561
Subject:
gliadin; allergens; monoclonal antibodies; heat treatment; antiserum; dough; enzyme-linked immunosorbent assay
Abstract:
... Antigen-labeled capture enzyme-linked immunosorbent assay with four different anti-gliadin monoclonal antibodies and an anti-gliadin serum and two different sample systems (purified gliadin fractions heat-treated in soluble phase and a model of dough simulating a baking process) were employed to study the effects of heat treatment on gliadin quantification. The analysis of purified gliadins showed ...
DOI:
10.1021/jf010180b
PubMed:
11743753

5. Antioxidants and total peroxyl radical-trapping ability of olive and seed oils

Author:
Cabrini, L.; Barzanti, V.; Cipollone, M.; Fiorentini, D.; Grossi, G.; Tolomelli, B.; Zambonin, L.; Landi, L.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 6026-6032
ISSN:
0021-8561
Subject:
sunflower oil; soybean oil; free radicals; olive oil; long chain fatty acids; gamma-tocopherol; alpha-tocopherol; ubiquinones; beta-carotene; corn oil; oxidation; peanut oil; phenolic compounds
Abstract:
... The presence of the oxidized and reduced forms of ubiquinones Q9 and Q10 was determined in commercial extra virgin olive and seed oils, where the amounts of alpha- and gamma-tocopherols and beta-carotene were also quantitated. Very high concentrations of ubiquinones were found in soybean and corn oils. Furthermore, the total antioxidant capability of each oil was evaluated by measuring total radic ...
DOI:
10.1021/jf010837t
PubMed:
11743803

6. Assessment of maturity degree of composts from domestic solid wastes by fluorescence and Fourier transform infrared spectroscopies

Author:
Provenzano, M.R.; Oliveira, S.C. de.; Silva, M.R.S.; Senesi, N.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5874-5879
ISSN:
0021-8561
Subject:
fluorescence; infrared spectroscopy; carbon nitrogen ratio; emissions
Abstract:
... Methods of assessment of compost maturity are needed so the application of composted materials to lands will provide optimal benefits. The aim of the present paper is to assess the maturity reached by composts from domestic solid wastes (DSW) prepared under periodic and permanent aeration systems and sampled at different composting time, by means of excitation-emission matrix (EEM) fluorescence sp ...
DOI:
10.1021/jf0106796
PubMed:
11743777

7. Biotransformation of (S)-(+)-linalool by Aspergillus niger: an investigation of the culture conditions

Author:
Demyttenaere, J.C.R.; Adams, A.; Vanoverschelde, J.; Kimpe, N. de.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5895-5901
ISSN:
0021-8561
Subject:
Aspergillus niger; linalool; metabolism; cultured cells; metabolites; odors
Abstract:
... The biotransformation of (S)-(+)-linalool by different Aspergillus niger strains was studied, using submerged shaken liquid cultures. One strain, A. niger DSM 821, was able to convert the substrate to cis- and trans-furanoid linalool oxide (yield 30% and 5%, respectively) and cis- and trans-pyranoid linalool oxide (yield 14% and 1.5%, respectively). The main metabolites, cis-(2S,5R)-furanoid and c ...
DOI:
10.1021/jf010581r
PubMed:
11743781

8. Capillary zone electrophoresis of coniferyl alcohol oxidation products

Author:
Fournand, D.; Lapierre, C.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5727-5731
ISSN:
0021-8561
Subject:
phenolic compounds; alcohols; electrophoresis; oxidation; enzyme activity; peroxidase; pH; temperature
Abstract:
... Capillary zone electrophoresis (CZE) was developed for the quantitative determination of dimers obtained by horseradish peroxidase-catalyzed oxidation of coniferyl alcohol. The influence of pH, electrolyte concentration, applied voltage, and temperature on CZE performance was investigated, resulting in an efficient and rapid separation. Coniferyl alcohol-derived dimers were directly analyzed from ...
DOI:
10.1021/jf010833o
PubMed:
11743754

9. Changes of volatile compounds during heating of bacuri pulp

Author:
Boulanger, R.; Crouzet, J.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5911-5915
ISSN:
0021-8561
Subject:
tropical and subtropical fruits; fruit pulp; heat treatment; volatile compounds; terpenoids; aldehydes; esters; food processing; Platonia insignis
Abstract:
... The formation of volatile compounds from precursors or through chemical rearrangement during heat treatment of bacuri pulp at fruit natural pH were studied using simultaneous distillation/extraction (SDE) technique. An increase of the quantities of oxygenated and hydrocarbon terpenes and, to a lesser degree, aldehydes, was observed after SDE at pH 3, relative to the other extraction methods used, ...
DOI:
10.1021/jf010894m
PubMed:
11743784

10. Characterization of peptides formed during fermentation of cocoa bean

Author:
Buyukpamukcu, E.; Goodall, D.M.; Hansen, C.E.; Keely, B.J.; Kochhar, S.; Wille, H.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5822-5827
ISSN:
0021-8561
Subject:
fermentation; vicilin; oligopeptides; chromatography; cocoa beans; amino acids; mass spectrometry; protein composition
Abstract:
... Analysis by SDS-PAGE and GPC-MS of fermented cocoa extracts shows changes in the amount and composition of the major proteins, accompanied by formation of complex distributions of peptides. MS/MS studies and application of SEQUEST sequencing software have allowed identification of two related peptides, a hexapeptide and a nonapeptide, formed from vicilin, one of the cocoa storage proteins. Time co ...
DOI:
10.1021/jf0104127
PubMed:
11743769

11. Characterization of the triterpene saponins of the roots and rhizomes of blue cohosh (Caulophyllum thalictroides)

Author:
Jhoo, J.W.; Sang, S.; He, K.; Cheng, X.; Zhu, N.; Stark, R.E.; Zheng, Q.Y.; Rosen, R.T.; Ho, C.T.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5969-5974
ISSN:
0021-8561
Subject:
Berberidaceae; medicinal plants; roots; chemical structure; chemical constituents of plants
Abstract:
... Seven triterpene saponins were isolated from n-butanol fractions of blue cohosh (Caulophyllum thalictroides) roots and rhizomes. Their structures were established by spectral (1H NMR, 13C NMR, 2D-NMR, and APCI-MS) techniques and chemical reactions as hederagenin 3-O-alpha-L-arabinopyranoside (1); caulophyllogenin 3-O-alpha-L-arabinopyranoside (2); hederagenin 3-O-beta-D-glucopyranosyl-(1 leads to ...
DOI:
10.1021/jf010814e
PubMed:
11743794

12. Characterization of volatiles in strawberry guava (Psidium cattleianum Sabine) fruit

Author:
Pino, J.A.; Marbot, R.; Vazquez, C.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5883-5887
ISSN:
0021-8561
Subject:
tropical and subtropical fruits; volatile compounds; esters; terpenoids; odors
Abstract:
... Volatile compounds were isolated from strawberry guava fruit by simultaneous steam distillation-solvent extraction according to Likens-Nickerson. Compounds were identified by capillary GC-MS and sensorially characterized by sniffing GC. Two hundred and four compounds were identified in the aroma concentrate, of which ethanol, alpha-pinene, (Z)-3-hexenol, (E)-beta-caryophyllene, and hexadecanoic ac ...
DOI:
10.1021/jf010414r
PubMed:
11743779

13. Chemical composition of some traditional herbal drug preparations: essential oil and aromatic water of costmary (Balsamita suaveolens Pers.)

Author:
Gallori, S.; Flamini, G.; Bilia, A.R.; Morelli, I.; Landini, A.; Vincieri, F.F.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5907-5910
ISSN:
0021-8561
Subject:
Asteraceae; herbal medicines; essential oils; plant extracts; chemical composition; leaves; monoterpenoids
Abstract:
... The compositions of the essential oil and the aromatic water of costmary (Balsamita suaveolens Pers.) cultivated in Tuscany were investigated. They represent the main ingredients of some traditional preparations sold commercially. The essential oil as such and the n-hexane extract of the aromatic water were analyzed by GC and GC-MS. Both samples were found to be rich in monoterpenes. Eighty-five c ...
DOI:
10.1021/jf0107656
PubMed:
11743783

14. Chemiluminescence investigation of detection of rutin in medicine and human urine using controlled-reagent-release technology

Author:
Song, Z.; Wang, L.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5697-5701
ISSN:
0021-8561
Subject:
chemiluminescence; urine; humans; organic compounds; herbal medicines
Abstract:
... A novel continuous-flow sensor based on chemiluminescence (CL) detection was developed for the determination of rutin in pharmaceutical preparations and human urine by controlled-reagent-release technology. The analytical reagents involved in the CL reaction, including luminol and hexacyanoferrate(III), were both immobilized on an anion-exchange column in a flow-injection system. The CL signal pro ...
DOI:
10.1021/jf010354p
PubMed:
11743749

15. Comparison of the bioactivity of two glucoraphanin hydrolysis products found in broccoli, sulforaphane and sulforaphane nitrile

Author:
Matusheski, N.V.; Jeffery, E.H.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5743-5749
ISSN:
0021-8561
Subject:
broccoli; organic sulfur compounds; nitriles; oral administration; enzyme activity; oxidoreductases; glutathione transferase; liver; colon; intestinal mucosa; pancreas; rats
Abstract:
... Epidemiological and laboratory studies suggest that dietary broccoli may prevent or delay a variety of cancers. Broccoli and other crucifers contain a relatively unique family of secondary metabolites called glucosinolates. Glucoraphanin, the major glucosinolate in broccoli, is hydrolyzed by an endogenous plant myrosinase to form either the potent anticarcinogen sulforaphane (SF) or sulforaphane n ...
DOI:
10.1021/jf010809a
PubMed:
11743757

16. Competitive binding of aroma compounds by beta-cyclodextrin

Author:
Goubet, I.; Dahout, C.; Semon, E.; Guichard, E.; Le Quere, J.L.; Voilley, A.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5916-5922
ISSN:
0021-8561
Subject:
volatile compounds; esters; alcohols; odors; dextrins; encapsulation
Abstract:
... Retention of six aroma compounds has been studied after dehydration of ternary mixtures of aroma water and beta-cyclodextrin. A maximal retention of a mole of aroma per mole of beta-cyclodextrin has been observed for five of the aroma compounds, whereas retention of benzyl alcohol can be twice as high. Retention of a mixture of aroma compounds has also been studied. It has been noted that when vol ...
DOI:
10.1021/jf0101049
PubMed:
11743785

17. Degradation of tetrahydro-beta-carbolines in the presence of nitrite: HPLC-MS analysis of the reaction products

Author:
Diem, S.; Gutsche, B.; Herderich, M.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5993-5998
ISSN:
0021-8561
Subject:
alkaloids; heterocyclic nitrogen compounds; high performance liquid chromatography; mass spectrometry; degradation; nitrites
Abstract:
... Motivated by the identification of numerous novel tetrahydro-beta-carboline-carboxylic acids in food samples, we studied the reactions of tetrahydro-beta-carbolines in the presence of nitrosating agents. The anticipated formation of nitroso derivatives from unsubstituted tetrahydro-beta-carbolines, and from tetrahydro-beta-carboline-3-carboxylic acids was indicated by HPLC-MS/MS analysis and valid ...
DOI:
10.1021/jf010363y
PubMed:
11743798

18. Determination of levamisole in animal tissues using liquid chromatography with ultraviolet detection

Author:
Dreassi, E.; Corbini, G.; La Rosa, C.; Politi, N.; Corti, P.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 5702-5705
ISSN:
0021-8561
Subject:
chickens; levamisole; pork; liver; drug residues; muscles; sheep; chicken meat; detectors; swine; kidneys; liquid chromatography; body fat
Abstract:
... An efficient and sensitive liquid chromatographic method is described for the determination of the anthelminthic drug levamisole, in muscle, liver, kidney and fat of sheep, pigs and poultry, using thiabendazole as internal standard. Samples were extracted by homogenizing with chloroform, and were applied to Supelco Si solid-phase extraction columns and eluted with methanol. Chromatographic analysi ...
DOI:
10.1021/jf0102362
PubMed:
11743750

19. Determination of total N-nitroso compounds and their precursors in frankfurters, fresh meat, dried salted fish, sauces, tobacco, and tobacco smoke particulates

Author:
Haorah, J.; Zhou, L.; Wang, X.; Xu, G.; Mirvish, S.S.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 6068-6078
ISSN:
0021-8561
Subject:
ketchup; pork; salted fish; hot dogs; dried fish; chicken meat; ground beef; smoke; chemical analysis; soy sauce; nitroso compounds; tobacco
Abstract:
... Total N-nitroso compounds (NOC) and NOC precursors (NOCP) were determined in extracts of food and tobacco products. Following Walters' method, NOC were decomposed to NO with refluxing HBr/HCl/HOAc/EtOAc and NO was measured by chemiluminescence. NOC were determined after sulfamic acid treatment to destroy nitrite, and NOCP were determined after treatment with 110 mM nitrite and then sulfamic acid. ...
DOI:
10.1021/jf010602h
PubMed:
11743810

20. Different effects of five catechins on 6-hydroxydopamine-induced apoptosis in PC12 cells

Author:
Jin, C.; Shen, S.; Zhao, B.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.12 pp. 6033-6038
ISSN:
0021-8561
Subject:
epicatechin; dopamine; viability; DNA fragmentation; neoplasms; epigallocatechin; cell lines; catechin; Parkinson disease; apoptosis; rats
Abstract:
... Five catechins [(-)-epigallocatechins gallate (EGCG), (-)-epicatechin gallate (ECG), (-)-epigallocatechin (EGC), (-)-epicatechin (EC), and (+)-catechin (C)] were compared with regard to their effects on 6-hydroxydopamine (OHDA)-induced apoptosis in PC12 cells-the vitro model of Parkinson's disease. Measured by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, 6-OHDA inhibit ...
DOI:
10.1021/jf010903r
PubMed:
11743804