Search Results
Results 451 - 500 of 744
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Edder Patrick - - 2003
A reliable and sensitive procedure is presented for the analysis of nitrofuran metabolite residues in foods of animal origin, like poultry and shrimp. The method is based on a one-step extraction/derivatization, followed by solid-phase extraction clean-up with polymeric phase cartridges. The separations were carried out by liquid chromatography coupled with ...
Ando Mami - - 2003
Oxygen-related free radicals have been suggested as a cause of aging and various diseases, for example, various cancers and rheumatoid arthritis. Because of this a radical scavenger as an antioxidant has been sought in food materials. Soy sauce is a traditional fermented seasoning of East Asian countries and is available ...
Kansci Germain - - 2003
Plants of the Dorstenia genus, used in traditional medicine and as food ingredient in Africa, are rich in polyphenolic compounds which can be involved in prevention of disease and food spoilage through their antioxidant activity. The antiradical activities of extracts of Dorstenia psilurus. D. ciliata and a phenolic compound (6-prenylapigenin) ...
Nakatsugawa Munehide - - 2003
This is the first report suggesting a causal relationship between acute respiratory distress syndrome and Hericium erinaceum extract, which is commercialized as a diet food. A 63-year-old man was admitted to our hospital for intensive care of severe acute respiratory failure with diffuse infiltration in both lungs. Bronchoalveolar lavage fluid ...
Tsao Rong - - 2003
Recent findings that many human chronic diseases are associated with oxidative stresses have instigated the search for dietary antioxidants. Many phytochemicals, particularly phenolic compounds, have been found to possess strong antioxidant activity and reduce the risks of those diseases. Isoflavones, a special phenolic group found in soybean, have been found ...
Iliopoulou Dimitra - - 2003
Five new brominated diterpenes, along with two known, have been isolated from the organic extract of the red alga Laurencia obtusa, collected from the coastal rocks of Preveza in the Ionean Sea, Greece. The novel metabolites prevezols B-E possess two new carbon skeletons, to the best of our knowledge, unprecedented ...
Leonard Stephen S - - 2003
Scavenging or quenching of the reactive oxygen species (ROS) involved in oxidative stress has been the subject of many recent studies. Resveratrol, found in various natural food products, has been linked to decreased coronary artery disease and preventing cancer development. The present study measured the effect of resveratrol on several ...
Konishi Yutaka - - 2003
The effects of more than 300 kinds of food extracts on intestinal permeability were investigated in Caco-2 cells with the use of model compounds: Lucifer Yellow (LY) for the paracellular pathway, Fluorescein (FC) for the monocarboxylic acid transporter-mediated pathway, and Rhodamine 123 (RH) for the p-glycoprotein-mediated efflux pathway. With several ...
Henterich Nadine - - 2003
Patients with coeliac disease (gluten-sensitive enteropathy) are intolerant against gliadins from wheat and the respective proteins from related cereals and have to keep a lifelong gluten-free diet. For control of gliadin in gluten-free food sensitive assay techniques are necessary. We developed an immunopolymerase chain reaction (iPCR) assay for gliadin. In ...
Glei M - - 2003
Functional foods need to be assessed for beneficial effects to support claims, but also for toxic effects. This report describes two examples of how complex food samples are initially characterized in human cells in vitro. Water extracts of green tea (GT) and black carrots (BC) were analyzed for key ingredients ...
Laparra J M - - 2003
The aim of this study was to examine the bioaccessibility (maximum soluble concentration in gastrointestinal medium) of total (AsT) and inorganic (AsI) arsenic contents and the effect on them of cooking edible seaweed, a food of great interest because of its high As content. An in vitro gastrointestinal digestion (pepsin, ...
Alonso Borbalán Angeles M - - 2003
There is considerable interest in the analysis of phenolic compounds due to their involvement in the organoleptic characteristics of foods and drinks, and their contribution to protection against cardiovascular diseases and cancers through their antioxidant activity. This article describes studies of the polyphenol content, both total (by means of the ...
Pellegrini Nicoletta - - 2003
Epidemiologic studies have demonstrated an inverse association between consumption of fruits and vegetables and morbidity and mortality from degenerative diseases. The antioxidant content of fruits and vegetables may contribute to the protection they offer from disease. Because plant foods contain many different classes and types of antioxidants, knowledge of their ...
McGregor Stephen J - - 2003
5alpha-Androst-1-ene-3beta,17beta-diol (1) was detected in extracts from fat of Sus scrofa L. (pig) by comparison with the commercially available synthetic compound, using gas chromatography-mass spectrometry. This observation is unprecedented because 1 is currently sold as a nutritional supplement, yet has not been previously reported as naturally occurring in the food ...
Hernando Alberto - - 2003
A procedure for determining small quantities of gliadins by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS) in gluten-free foods containing relatively large amounts of prolamin proteins from maize or rice is described. We report for the first time that gliadins, the ethanol-soluble wheat prolamin fraction, can be quantitatively solubilized in ...
Fasina Yewande O - - 2003
Availability of gram quantities of purified soybean lectin (SBL) to scientists will foster discovery of novel biomedical applications of the lectin and provide the opportunity to investigate the antinutritional effects of SBL in soybean-consuming food animals and poultry. Therefore, a semi-pilot-scale procedure for isolating and purifying SBL was designed. Defatted ...
Panfili Gianfranco - - 2003
The eight vitamers of vitamin E (alpha-, beta-, gamma-, and delta-tocopherols and -tocotrienols) have different antioxidant and biological activities and have different distributions in foods. Some cereals, especially oat, rye, and barley, are good sources of tocotrienols. A fast procedure for the determination of tocopherols and tocotrienols (tocols) in cereal ...
Su Chung-Ren - - 2003
Chemical investigation on the stem and root bark of Acronychia pedunculata has resulted in the isolation of five new acetophenones, namely, acronyculatins A (1), B (2), C (3), D (4), and E (5). The structures of these metabolites were established on the basis of their 1D and 2D NMR spectroscopic ...
Galindo-Cuspinera Veronica - - 2003
Annatto preparations are used to impart distinctive flavor and color to foods and are a primary colorant in dairy foods such as cheese and butter. There are several reports indicating that certain fractions of the annatto plant have biological activities against microorganisms of significance in food fermentation, food preservation, and ...
Norata Giuseppe D - - 2003
Oxidised low-density lipoprotein (LDL) is believed to be the most atherogenic form of LDL. However, while a number of experimental data support this concept, the protective role of antioxidants that may prevent LDL oxidation in atherosclerosis is only partially confirmed by studies in man. Observational and epidemiological data as well ...
Caballo-López A - - 2003
A dynamic ultrasound-assisted method for the extraction of N-methylcarbamates (oxamyl, dioxacarb, metolcarb, carbofuran, carbaryl and isoprocarb) from soils and foods is proposed. The main factors affecting the extraction efficiency have been optimised by means of a central composite design. Pure water can be used as leaching agent. A flow injection ...
Cevallos-Casals Bolívar A - - 2003
Stoichiometric and kinetic values of phenolics against DPPH (2,2-diphenyl-1-picrylhydrazyl) were determined for Andean purple corn (Zea mays L.) and red sweetpotato (Ipomoea batatas). Both crops had higher antioxidant capacity and antiradical kinetics than blueberries and higher or similar anthocyanin and phenolic contents. The second-order rate constant (k(2)) was 1.56, 1.12, ...
Wei Yanhong - - 2003
Trace amounts of cashew nut protein can provoke severe allergic reactions in sensitive patients. Consequently, commercial food processors and regulatory agencies must be vigilant to prevent cashew nut cross-contamination among foods and ensure proper labeling. Toward this end, we have developed a sandwich enzyme-linked immunosorbent (ELISA) to detect the predominant ...
Dragland Steinar - - 2003
We assessed the contribution of culinary and medicinal herbs to the total intake of dietary antioxidants. Our results demonstrate that there is more than a 1000-fold difference among antioxidant concentrations of various herbs. Of the dried culinary herbs tested, oregano, sage, peppermint, garden thyme, lemon balm, clove, allspice and cinnamon ...
Muus U - - 2003
CycloSal-d4TMP and two different bis(benzyl) phosphate triesters of the antivirally active nucleoside analog d4T were studied with regard to their chemical hydrolysis behavior at pH 7.3, in CEM/0 cell extracts, and their anti-HIV activity. In contrast to triesters 2-4, bis-(o-AB)-d4TMP 1 was found to be chemically exquisitely stable. All compounds ...
Valdés Israel - - 2003
OBJECTIVES: There is currently much call for a reliable enzyme-linked immunosorbent assay (ELISA) protocol for determining gluten in foods to serve as a basis for further Codex Alimentarius regulations. Given its ability to recognize the potential coeliac-toxic epitope QQPFP, which occurs repeatedly in alpha-, gamma- and omega-gliadins, hordeins and secalins, ...
Bodennec Jacques - - 2003
We describe a new method that permits quantification in the pmol to nmol range of three lyso-neutral glycosphingolipids (lyso-n-GSLs), glucosylsphingosine (GlcSph), galactosylsphingosine (GalSph), and lactosylsphingosine, in the same sample as neutral glycosphingolipids (n-GSLs). Lyso-n-GSLs and n-GSLs are initially obtained from a crude lipid extract using Sephadex G25 chromatography, followed by ...
Vacca Giovanni - - 2003
A previous study demonstrated that an extract of Salvia miltiorrhiza, a medicinal herb highly valued in Chinese folk medicine for the treatment of different pathologies, including insomnia, was capable of reducing voluntary alcohol intake in selectively bred Sardinian alcohol-preferring (sP) rats. The present study was designed to evaluate the suitability ...
Mothes Thomas - - 2003
A gluten-free diet is the cornerstone treatment of coeliac disease. Until now, it is not known conclusively whether trace amounts of gluten might be allowed in the diet, as suggested by Codex Alimentarius. Gluten-free foods intended for dietary use can now be analysed reliably for residual gluten by the new ...
Chung Hau Yin - - 2003
Distributions and seasonal variations of the key seafood flavor compounds including 2-bromophenol, 4-bromophenol, 2,4-dibromophenol, 2,6-dibromophenol, and 2,4,6-tribromophenol in three species of brown algae (Padina arborescens, Sargassum siliquastrum, and Lobophora variegata) found in Hong Kong waters were investigated. Bromophenols were extracted by simultaneous steam distillation and solvent extraction apparatus and analyzed ...
Dragsted Lars O - - 2003
Many polyphenols are potent antioxidants in foods and model systems and they have therefore very naturally been linked with the hypothesis that their redox actities may confer them with specific health benefits. Their prevalence in plant derived foods, which are generally accepted as healthy has supported this view and inspired ...
Uusitalo Risto - - 2003
Eutrophication of surface waters can be accelerated by agricultural inputs of phosphorus (P), provided that P is in a form that can be utilized by aquatic algae. We studied anion exchange resin (AER) extraction and a dual culture algal assay (DCAA) for the determination of potentially algal-available P in water ...
Odunola O A - - 2003
The modulatory effects of the aqueous extracts of some locally consumed food condiments namely garlic (Allium sativum), ginger (Zingiber officinale), sconio (Pimpinella anisumm LINNE) and cloves (Syzygium aromaticum) on the clastogenic effects of sodium arsenite, a known inorganic clastogen were assessed in mouse bone marrow cells using the micronucleus assay ...
Saglam H - - 2003
The quality control determinations on herba and radix Chelidonii prepared from Chelidonium majus L., growing wildly in Bursa, Uluda─č surroundings, have been conducted according to DAB 9. Ash, humidity and total alkaloidal content have been carried out. LC(50) value of chelidonine and protopine, the most important alkaloids, and the alcoholic ...
Wolfe Kelly - - 2003
Consumption of fruits and vegetables has been shown to be effective in the prevention of chronic diseases. These benefits are often attributed to the high antioxidant content of some plant foods. Apples are commonly eaten and are large contributors of phenolic compounds in European and North American diets. The peels ...
Fernández-Pérez V - - 2003
A method based on superheated water extraction has been developed for the removal of cholesterol from solid food thus providing a clean approach by avoiding the use of organic solvents. A preconcentration step was also studied with the aim of solving the problem derived from low-cholesterol-content samples and dilution effect. ...
Zhang Minlian - - 2003
A molecularly imprinted polymeric monolith (MIPM) was prepared by in situ polymerization using styrene, glycidyl methacrylate and methacrylic acid as monomers, divinylbenzene and triallyl isocyanurate as cross-linking agents, and ceramide III as print molecule. The texture, pore size distribution, mobile phase flow characteristic, and chromatographic performance of the MIPM and ...
Carpinella María C - - 2003
In the course of screening for novel naturally occurring insecticides from plants, the activity of the fruit extract of the Argentinian Melia azedarach L. (Meliaceae) and its recently described limonoid meliartenin were investigated. The antifeedant activity of the fruit extract was tested on a variety of herbivore and granivorous insects ...
Phillippy Brian Q - - 2003
The ion chromatographic method for the quantification of phytate (InsP(6)) in foods was adapted for the analysis of roots and tubers. To maximize sensitivity, ultraviolet (UV) detection following postcolumn derivatization was compared with evaporative light-scattering detection (ELSD). Detection limits for phytate were 0.5 and 1 microg for UV and ELSD, ...
Tsai Chin-Hung - - 2003
In the interest of developing a simple and rapid ultraweak chemiluminescence assay for assessing the superoxide (O(2)(-))-scavenging activities of various aqueous extracts of food constituents, a specific and stable O(2)(-)-generating system was sought. Reported herein is the obtainment for the first time of a specific and stable O(2)(-)-generating system consisting ...
Henning Susanne M - - 2003
Our literature review of currently available data in the area of tea and cancer prevention demonstrated that there is more conclusive evidence for the chemopreventive effect of green tea compared with black tea. We suggest that this is due to a large variation of the flavanol content in tea, which ...
Nerín Cristina - - 2002
The optimization of supercritical fluid extraction using CO2 for the extraction of contaminants in 15 samples of recycled paper and board (P&B) has been studied. An experimental design was used for simultaneous optimization of the variables involved in both the extraction step and the collection of the extract. Methanol was ...
Butera Daniela - - 2002
Sicilian cultivars of prickly pear (Opuntia ficus indica) produce yellow, red, and white fruits, due to the combination of two betalain pigments, the purple-red betanin and the yellow-orange indicaxanthin. The betalain distribution in the three cultivars and the antioxidant activities of methanolic extracts from edible pulp were investigated. In addition, ...
Rancan Fiorenza - - 2002
Natural substances extracted from lichens and boldo tree were tested in vivo and in vitro as possible UV-light filters. The protection factors were compared with that found for the references: Nivea sun Spray LSF 5, octylmethoxycinnamate (OMC) and 4-tert.-butyl-4'-methoxy dibenzoylmethane (BM-DBM). The stability of the single compounds was studied through ...
Tura Debora - - 2002
The analysis of phenols in samples of plant and food origin attracts considerable attention. However, sample handling is often an ignored feature of the analysis. This review highlights the importance of sample extraction in an analysis and the problems that can arise during this step. Many questions remain unanswered and ...
Rechner A R - - 2002
The phenolic composition and antioxidant activities [TEAC, ORAC, FRAP] of consumer brews (1 tea bag in 230 ml for 1 min) of seven different brands of black tea from the British market were investigated. The main phenolic compounds identified were epigallocatechin gallate, four theaflavins, as well as epicatechin gallate, theogallin ...
Hunt Matthew J - - 2002
To determine whether homocysteine (Hcy)-mediated activation of endocardial endothelial (EE) cells is ameliorated by peroxisome proliferator-activated receptor (PPAR), we isolated EE cells from mouse endocardium. Matrix metalloproteinase (MMP) activity and intercellular adhesion molecule (ICAM)-1 in EE cells were measured in the presence and absence of Hcy, and ciprofibrate (CF; PPAR-alpha ...
Kang Jeong-Hun - - 2002
Bisphenol A (BPA) contamination of canned foods for human use has been studied, but there are no reports concerning BPA contamination of canned pet foods. The purpose of this study was to identify the levels of BPA in canned pet foods. A total of 26 samples (15 samples of cat ...
Murphy Patricia A - - 2002
Acetonitrile is superior to acetone, ethanol and methanol in extracting the 12 phytoestrogenic soy isoflavone forms found in foods. At 53% organic solvent in water, raw soy flour, tofu, tempeh, textured vegetable protein and soy germ were evaluated for isoflavone extraction efficiency. The efficiency of acetonitrile extraction was demonstrated in ...
Drozd Janina - - 2002
The aim of the present work was an estimation of the influence of two plant pharmaceutical preparations containing an extract from the root of Eleutherococcus senticosus: Argoeleuter tablets and Immuplant tablets, on the humoral response of immunological system. Experiments were performed with female Balb/c mice six weeks old. In order ...
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