PubAg

Main content area

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.3 Remove constraint Source: 2001 v.49 no.3
Start Over

Search

96  Search Results

« Previous | 1 - 20 of 96 |
Number of results to display per page

Search Results

1. Analysis and properties of arabinoxylans from discrete corn wet-milling fiber fractions

Author:
Doner, L.W.; Johnston, D.B.; Singh, V.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1266-1269
ISSN:
0021-8561
Subject:
chemical composition; dietary fiber; hemicellulose; sugars; pericarp; viscosity; corn; aleurone layer; milling; pentosans; chemical structure
Abstract:
... Three fibrous corn wet-milling fractions, coarse fiber, fine fiber, and spent flake, were isolated. More highly valued uses are sought for these milling products, which are generally directed into the corn gluten feed product stream. Coarse fiber was further dissected into pericarp and aleurone layers. An alkaline hydrogen peroxide process was used to efficiently extract corn fiber gum (CFG) from ...
DOI:
10.1021/jf001105o
PubMed:
11312848

2. Analysis of canthaxanthin and related pigments from Gordonia jacobaea mutants

Author:
Miguel, T. de.; Sieiro, C.; Poza, M.; Villa, T.G.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1200-1202
ISSN:
0021-8561
Subject:
canthaxanthin; colorimetry; feed additives; high performance liquid chromatography; mutants; bacteria; pigments
Abstract:
... A collection of 43 mutant strains of the bacterium Gordonia jacobaea was obtained by means of ethyl methanesulfonate treatment, and the strains were selected for their different pigmentation with respect to the wild-type strain. None of the mutants showed auxotrophy. They all showed good genetic stability and a growth rate similar to that of the parental strain. Canthaxanthin and other carotenoids ...
DOI:
10.1021/jf001169z
PubMed:
11312835

3. Analysis of limonoid glucosides from Citrus by electrospray ionization liquid chromatography-mass spectrometry

Author:
Schoch, T.K.; Manners, G.D.; Hasegawa, S.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1102-1108
ISSN:
0021-8561
Subject:
oranges; limonoids; glucosides; liquid chromatography; mass spectrometry
Abstract:
... An electrospray ionization liquid chromatography-mass spectrometry (ESI-LC-MS) method for the detection and quantitation of limonoid glucosides has been developed. Negative ions [M - H(+)]- characteristic of six limonoid glucosides can be detected and quantified from selected ion monitoring chromatograms using carminic acid as an internal standard. The described method has been applied to the anal ...
DOI:
10.1021/jf001157d
PubMed:
11312819

4. Antagonism of free-radical-induced damage of adlay seed and its antiproliferative effect in human histolytic lymphoma U937 monocytic cells

Author:
Kuo, C.C.; Shih, M.C.; Kuo, Y.H.; Chiang, W.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1564-1570
ISSN:
0021-8561
Subject:
deoxysugars; plant extracts; cell lines; bran; lymphoma; hydrogen peroxide; Coix lacryma-jobi; oxidation; extraction; superoxide anion; medicinal properties; xanthine; apoptosis; humans; hulls; testa; methanol; monocytes; neutrophils
Abstract:
... The goal of our current research was to investigate the antioxidative effects of methanolic extracts from different parts of adlay seed and their antiproliferative activity in malignant human cells. The methanolic extracts from different parts of adlay seeds were from the hull (AHM), testa (ATM), bran (ABM), and polished adlay (PAM). AHM exhibited greater capacity to scavenge superoxide anion radi ...
DOI:
10.1021/jf001215v
PubMed:
11312897

5. Antifungal mechanism of polygodial

Author:
Kubo, I.; Fujita, K.; Lee, S.H.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1607-1611
ISSN:
0021-8561
Subject:
mechanism of action; sesquiterpenoids; pyrophosphatases; Saccharomyces cerevisiae; plasma membrane; Persicaria hydropiper; antifungal properties
Abstract:
... The primary antifungal action of polygodial comes in part from its ability to function as a nonionic surfactant, disrupting the lipid-protein interface of integral proteins and denaturing their conformation. As a result, the antifungal mechanism of this sesquiterpene dialdehyde is associated with the membrane functions or derangement of the membrane. For example, the glucose-induced medium acidifi ...
DOI:
10.1021/jf000136g
PubMed:
11312903

6. Antioxidant effects of water extracts from barley (Hordeum vulgare L.) prepared under different roasting temperatures

Author:
Duh, P.D.; Yen, G.C.; Yen, W.Y.; Chang, L.W.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1455-1463
ISSN:
0021-8561
Subject:
barley; roasting; temperature; water; Maillard reaction products; oxidation; linoleic acid; deoxysugars; free radicals; tocopherols; catechin; lutein; antioxidant activity; extracts
Abstract:
... The antioxidant effects of water extracts of roasted barley (WERB) were investigated under different roasting temperatures and compared with those of the water extracts of unroasted barley (WEUB). It was found that the Maillard reaction products increased upon increasing the roasting temperatures. Both WERB and WEUB exhibited significant antioxidant activities in linoleic acid and liposome model s ...
DOI:
10.1021/jf000882l
PubMed:
11312880

7. Antipeptide antibodies recognizing plasmin sensitive sites in bovine beta-casein sequences

Author:
Senocq, D.; Dupont, D.; Rolet-Repecaud, O.; Faurie, F.; Levieux, D.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1571-1577
ISSN:
0021-8561
Subject:
rabbits; synthetic peptides; polyclonal antibodies; cattle; Western blotting; immunization; plasmin; enzyme activity; biosensors
Abstract:
... To investigate plasmin activity in cheese, we produced antibodies to bovine beta-casein with controlled specificity, suitable as markers of the integrity of the major bonds involved in its initial breakdown. Sixteen rabbits were immunized with synthetic substitutes for six plasmin-sensitive peptides. Antisera raised to the peptides (f20-39), (f40-56), (f94-113), (f184-202), and (f193-209) recogniz ...
DOI:
10.1021/jf001352s

8. A quantitative stable-isotope LC-MS method for the determination of folic acid in fortified foods

Author:
Pawlosky, R.J.; Flanagan, V.P.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1282-1286
ISSN:
0021-8561
Subject:
folic acid; liquid chromatography; mass spectrometry; carbon; stable isotopes; breakfast cereals; wheat; corn; oats; bran; isotope dilution technique
Abstract:
... A stable-isotope liquid chromatography-mass spectrometry (LC-MS) assay was developed for the quantitative determination of folic acid in fortified foods. Folic acid was extracted from food samples into a phosphate buffer, purified on a C-18 Sep-Pak cartridge, and analyzed by LC-MS in the negative ion mode using electrospray ionization. The analyte was quantified using 13C5-folic acid as an interna ...
DOI:
10.1021/jf001172i
PubMed:
11312851

9. Aquatic humic substances inhibit clastogenic events in germinating seeds of herbaceous plants

Author:
Ferrara, G.; Loffredo, E.; Senesi, N.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1652-1657
ISSN:
0021-8561
Subject:
Allium cepa; Vicia faba; seed germination; maleic hydrazide; humic acids; fulvic acids; genotoxicity; sediments
Abstract:
... One humic acid (HA) and two fulvic acids (FAs) of aquatic origin have been tested for their capacity to inhibit clastogenic events caused by maleic hydrazide (MH) in germinating seeds of the herbaceous plant species Allium cepa and Vicia faba. Either HA or FA at concentrations of 50 and 500 mg L(-1) was interacted with 10 mg L(-1) MH for 24 h before addition to the seeds. The evaluation of genotox ...
DOI:
10.1021/jf0011438
PubMed:
11312910

10. Association of ethylene dibromide (EDB) with mature cranberry (Vaccinium macrocarpon) fruit

Author:
Xia, K.; Rice, C.W.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1246-1252
ISSN:
0021-8561
Subject:
cranberries; food contamination; ethylene dibromide; surfaces; irrigation; harvesting; water; water pollution; Massachusetts
Abstract:
... Ethylene dibromide (EDB), a potential carcinogen, has been used in gasoline mixtures to avoid the accumulation of metallic lead in engines. Ethylene dibromide is present in the environment and in groundwater. Previous analysis has shown that EDB levels have reached up to 16 microgram L(-1) in the groundwater at two fuel spill plumes in the vicinity of the Massachusetts Military Reservation (MMR) B ...
DOI:
10.1021/jf001025k
PubMed:
11312844

11. Authentication of vegetable oils by bulk and molecular carbon isotope analyses with emphasis on olive oil and pumpkin seed oil

Author:
Spangenberg, J.E.; Ogrinc, N.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1534-1540
ISSN:
0021-8561
Subject:
pumpkins; olive oil; long chain fatty acids; seed oils; adulterated products; carbon; mass spectrometry; gas chromatography; detection; stable isotopes; Slovenia; Croatia
Abstract:
... The authenticity of vegetable oils consumed in Slovenia and Croatia was investigated by carbon isotope analysis of the individual fatty acids by the use of gas chromatography-combustion-isotope ratio mass spectrometry (GC/C/IRMS), and through carbon isotope analysis of the bulk oil. The fatty acids from samples of olive, pumpkin, sunflower, maize, rape, soybean, and sesame oils were separated by a ...
DOI:
10.1021/jf001291y
PubMed:
11312892

12. Beer consumption and changes in stability of human serum proteins

Author:
Gorinstein, S.; Caspi, A.; Goshev, I.; Moncheva, S.; Zemser, M.; Weisz, M.; Libman, I.; Lerner, H.T.; Trakhtenberg, S.; Martin-Belloso, O.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1441-1445
ISSN:
0021-8561
Subject:
serum albumin; humans; denaturation; urea; molecular conformation; globulins; beers
Abstract:
... The aim of this study was to evaluate the influence of beer consumption (BC) on the functional and structural properties of human serum proteins (HSP). Thirty-eight volunteers (after coronary bypass) were divided into two groups: experimental (EG) and control (CG). Nineteen volunteers of the EG consumed 330 mL per day of beer (about 20 g of alcohol) for 30 consecutive days. The CG volunteers consu ...
DOI:
10.1021/jf001262n
PubMed:
11312877

13. Behavioral responses of rats exposed to long-term dietary vinclozolin

Author:
Flynn, K.M.; Delchos, K.B.; Newbold, R.R.; Ferguson, S.A.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1658-1665
ISSN:
0021-8561
Subject:
food intake; locomotion; gender differences; feeding preferences; pregnancy; toxicity; rats; vinclozolin; oral administration; saccharin
Abstract:
... Vinclozolin is a fungicide used on food crops with human exposure estimated at approximately 2 microgram/kg/day from ingestion; occupational exposure, however, may be greater. The metabolites of vinclozolin have been reported to act as antiandrogens and have adverse effects on reproductive physiology and behavior in animals. Here, pregnant rats were fed soy-free diets containing 0, 10, 150, or 750 ...
DOI:
10.1021/jf0008893
PubMed:
11312911

14. Biomechanical and biochemical pulping of sugarcane bagasse with Ceriporiopsis subvermispora fungal and xylanase pretreatments

Author:
Ramos, J.; Gonzalez, M.; Ramirez, F.; Young, R.; Zuniga, V.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1180-1186
ISSN:
0021-8561
Subject:
glycosidases; alkaline pulping; sugarcane bagasse; Polyporales; biodegradation; optical properties; pulp; chemithermomechanical pulping
Abstract:
... Sugarcane bagasse was pretreated with both the white-rot fungus, Ceriporiopsis subvermispora, and xylanase enzyme for 2 weeks before soda chemithermomechanical (CTMP) and soda chemical (CP) cooking. For fungi-CTMP (BCTMP) and enzyme-fungi-CTMP (EBCTMP), the bagasse, after bio-pretreatment, was cooked with 5% sodium hydroxide, at 130 degrees C for 20 min. For the chemical pulping (CP), after fungi ...
DOI:
10.1021/jf0011586
PubMed:
11312832

15. Carotenoid composition in the fruits of red paprika (Capsicum annuum var. lycopersiciforme rubrum) during ripening: biosynthesis of carotenoids in red paprika

Author:
Deli, J.; Molnar, P.; Matus, Z.; Toth, G.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1517-1523
ISSN:
0021-8561
Subject:
Capsicum annuum; ripening; carotenoids; chemical structure; biosynthesis; chemical constituents of plants; high performance liquid chromatography
Abstract:
... The changes in the carotenoid pigments of the Capsicum annuum var. lycopersiciforme rubrum during maturation have been investigated quantitatively by means of a HPLC technique. In all of the chromatograms, 40 peaks were detected; 34 carotenoids were identified. The total carotenoid content of the ripe fruits was about 1.3 g/100 g of dry weight, of which capsanthin constituted 37%, zeaxanthin was 8 ...
DOI:
10.1021/jf000958d
PubMed:
11312889

16. Changes in oxygen-scavenging systems and membrane lipid peroxidation during maturation and ripening in blackberry

Author:
Wang, S.Y.; Jiao, H.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1612-1619
ISSN:
0021-8561
Subject:
fatty acids; glutathione; glutathione-disulfide reductase; Rubus; catalase; dehydroascorbic acid; glutathione peroxidase; cell membranes; ripening; enzyme activity; ascorbic acid
Abstract:
... Maturation and ripening of blackberry (Rubus sp.) fruit was accompanied by decreased activities of oxygen-scavenging enzymes [superoxide dismutase (EC 1.15.1.1), glutathione-peroxidase (EC 1.11.1.9), catalase (EC 1.11.1.6)] and enzymes in the ascorbate-glutathione cycle [ascorbate peroxidase (EC 1.11.1.11), monodehydroascorbate reductase (EC 1.6.5.4), dehydroascorbate reductase (EC 1.8.5.1), and g ...
DOI:
10.1021/jf0013757
PubMed:
11312904

17. Characteristic aroma components of British Farmhouse Cheddar cheese

Author:
Suriyaphan, O.; Drake, M.A.; Chen, X.Q.; Cadwallader, K.R.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1382-1387
ISSN:
0021-8561
Subject:
Cheddar cheese; odors; volatile compounds; smell; gas chromatography
Abstract:
... Aroma components responsible for aroma typical of British Farmhouse Cheddar cheese were studied by aroma extract dilution analysis. Cheese extracts were prepared by direct solvent extraction, high-vacuum transfer, and class fractionation. Most aroma-active components of acidic and neutral/basic fractions have been previously associated with Cheddar cheese flavor. p-Cresol was mainly responsible fo ...
DOI:
10.1021/jf001121l
PubMed:
11312868

18. Characteristics and composition of watermelon, pumpkin, and paprika seed oils and flours

Author:
El-Adawy, T.A.; Taha, K.M.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1253-1259
ISSN:
0021-8561
Subject:
pumpkins; nutrient content; in vitro digestibility; watermelons; unsaturated fatty acids; seed oils; crude fiber; antinutritional factors; Citrullus lanatus; crude protein; flour; amino acid composition; mineral content
Abstract:
... The nutritional quality and functional properties of paprika seed flour and seed kernel flours of pumpkin and watermelon were studied, as were the characteristics and structure of their seed oils. Paprika seed and seed kernels of pumpkin and watermelon were rich in oil and protein. All flour samples contained considerable amounts of P, K, Mg, Mn, and Ca. Paprika seed flour was superior to watermel ...
DOI:
10.1021/jf001117+
PubMed:
11312845

19. Characterization of cigar tobaccos by gas chromatographic/mass spectrometric analysis of nonvolatile organic acids: application to the authentication of Cuban cigars

Author:
Ng, L.K.; Hupe, M.; Vanier, M.; Moccia, D.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1132-1138
ISSN:
0021-8561
Subject:
tobacco; gas chromatography; mass spectrometry; organic acids and salts; multivariate analysis; geographical variation; Cuba; Central America; Mexico; United States
Abstract:
... A reliable method based on gas chromatographic/mass spectrometric (GC/MS) profiling of nonvolatile organic acids is described for the characterization of cigars. The method involves an aqueous extraction of ground tobacco and selective isolation of the acids by simply stirring strong anion exchange (SAX) disks in the aqueous tobacco extract. The acids are then directly silylated on the disk with N ...
DOI:
10.1021/jf001210y
PubMed:
11312824

20. Characterization of natural "cooling" compounds formed from glucose and L-proline in dark malt by application of taste dilution analysis

Author:
Ottinger, H.; Bareth, A.; Hofmann, T.
Source:
Journal of agricultural and food chemistry 2001 v.49 no.3 pp. 1336-1344
ISSN:
0021-8561
Subject:
barley; malt; sensory evaluation; glucose; Maillard reaction products; proline
Abstract:
... Gel permeation chromatography of the solvent extractables isolated from a thermally treated glucose/L-proline mixture and sensory analysis of the fractions collected led to the discovery of the presence of "cooling" compounds in Maillard reactions. To characterize the key compounds imparting this cooling sensation to the oral cavity, a taste dilution analysis was performed by determining the taste ...
DOI:
10.1021/jf0012594
PubMed:
11312861