|
|
|
| Registros recuperados: 28 | |
|
| |
|
| |
|
|
| Liu,Chunming; Zhao,Yixin; Liu,Jianfeng; Gen,Wanting; Cheng,Yunqing. |
| Background Ethylene is capable of promoting seed germination in some plant species. Mobilization of metals such as Fe, Cu, Mn, and Zn in mature seeds takes place when seeds are germinating. However, whether ethylene is involved in the regulation of soybean seed germination and metal element mobilization during early seed germination stage remains unknown. In the present study, seeds were treated with ethylene synthesis inhibitor aminoethoxyvinylglycine (AVG) and ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC), and double distilled H2O (ddH(2)0) treatment was used as control. Ethylene emission, ACC synthase (ACS) expression, ACS enzyme activity and Ca, Zn, Mn, Cu and Fe content in hypocotyls were qualified to analyze the relationship between... |
| Tipo: Journal article |
Palavras-chave: ACC synthase; Bioavailability; Ethylene; Metallic elements; Seed germination; Soybean. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000500001 |
| |
|
| |
|
|
| Laurier, Fabien; Cossa, Daniel; Beucher, Charlotte; Breviere, Emily. |
| The Mussel Watch program conducted along the French coasts for the last 20 years indicates that the highest mercury concentrations in the soft tissue of the blue mussel (Mytilus edulis) occur in animals from the eastern part of Seine Bay on the south coast of the English Channel, the "Pays de Caux". This region is characterized by the presence of intertidal and submarine groundwater discharges, and no particular mercury effluent has been reported in its vicinity. Two groundwater emergence systems in the karstic coastal zone of the Pays de Caux (Etretat and Yport with slow and fast water percolation pathways respectively) were seasonally sampled to study mercury distribution, partitioning and speciation in water. Samples were also collected in the... |
| Tipo: Text |
Palavras-chave: Mussel; Estuaries; Groundwater seepage; Bioavailability; Speciation; Mercury. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-4704.pdf |
| |
|
|
| Laurier, Fabien; Cossa, Daniel; Beucher, Charlotte; Breviere, Emily. |
| The Mussel Watch program conducted along the French coasts for the last 20 years indicates that the highest mercury concentrations in the soft tissue of the blue mussel (Mytilus edulis) occur in animals from the eastern part of Seine Bay on the south coast of the English Channel, the "Pays de Caux". This region is characterized by the presence of intertidal and submarine groundwater discharges, and no particular mercury effluent has been reported in its vicinity. Two groundwater emergence systems in the karstic coastal zone of the Pays de Caux (Etretat and Yport with slow and fast water percolation pathways respectively) were seasonally sampled to study mercury distribution, partitioning and speciation in water. Samples were also collected in the... |
| Tipo: Text |
Palavras-chave: Mussel; Estuaries; Groundwater seepage; Bioavailability; Speciation; Mercury. |
| Ano: 2007 |
URL: https://archimer.ifremer.fr/doc/2007/publication-3113.pdf |
| |
|
| |
|
| |
|
|
| Gremare, A; Medernach, L; Debovee, F; Amouroux, Jm; Charles, F; Dinet, A; Vetion, G; Albert, P; Colomines, Jc. |
| The abilities of several biochemical characteristics of sedimentary organic matter to describe quantitative changes in benthic fauna were assessed based on several surveys carried out within the Gulf of Lion during the last decade. Two sets of high frequency samplings were carried out both inshore and offshore, together with an assessment of seasonal variability along a depth gradient, and a synoptic assessment of mesoscale spatial variability. The considered biochemical parameters were: total organic matter, organic carbon, nitrogen, total proteins, available proteins, carbohydrates, lipids, total and available amino acids. The considered faunal parameters were the abundance and the biomass of both meio- and macrofauna. Our results contribute to unravel... |
| Tipo: Text |
Palavras-chave: Matière organique sédimentée; Benthos; Golfe du Lion; Acides aminés; Biodisponibilité; Sedimentary organics; Benthos; Gulf of Lion; Amino acids; Bioavailability. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00321/43264/42995.pdf |
| |
|
| |
|
|
| Wu,X.M; Yu,Y.L; Li,M; Long,Y.H; Fang,H; Li,S.N. |
| An incubation test was conducted to investigate the effect of aging on bioavailability of chlorpyrifos in soil and to assess the feasibility of chemical extraction techniques for predicting bioavailability of chlorpyrifos in soil. Chlorpyrifos was spiked into sterilized soil and aged in microcosms for up to 120 days. The earthworms were incubated in the spiked soils, at 0, 7, 14, 30, 60, and 120 days after spiking, for a period of 7 days. After exposure, chlorpyrifos concentrations in the earthworm tissues were determined. Change in chemical extractability of soil-chlorpyrifos was measured using a several solvent systems including methanol, methanol-water (9:1), acetone-water (5:3), and water. The results show that chemical extractability and earthworm... |
| Tipo: Journal article |
Palavras-chave: Chlorpyrifos; Residue; Soil; Earthworm; Bioavailability; Prediction. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162011000100004 |
| |
|
|
| Violante,A; Cozzolino,V; Perelomov,L; Caporale,A.G; Pigna,M. |
| In soil environments, sorption/desorption reactions as well as chemical complexation with inorganic and organic ligands and redox reactions, both biotic and abiotic, are of great importance in controlling their bioavailability, leaching and toxicity. These reactions are affected by many factors such as pH, nature of the sorbents, presence and concentration of organic and inorganic ligands, including humic and fulvic acid, root exudates, microbial metabolites and nutrients. In this review, we highlight the impact of physical, chemical, and biological interfacial interactions on bioavailability and mobility of metals and metalloids in soil. Special attention is devoted to: i) the sorption/desorption processes of metals and metalloids on/from soil components... |
| Tipo: Journal article |
Palavras-chave: Bioavailability; Heavy metals; Metalloid; Adsorption; Desorption; Chemical speciation. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162010000100005 |
| |
|
|
| Espinosa, Luisa Fernanda; Parra, Juan Pablo; Villamil, Carlos. |
| El ecosistema de manglar de la Ciénaga Grande de Santa Marta (CGSM) ha estado sometido a fuertes presiones antropogénicas que han ocasionado, entre otros, cambios en las características fisicoquímicas de sus sedimentos. En condiciones normales, los sedimentos asociados al manglar generan equilibrios que permiten la retención de metales pesados en distintas formas químicas, al romperse este equilibrio los metales que no son retenidos en la matriz sedimentaria, pueden ser removilizados y hacerse biodisponibles. Con el propósito de establecer el potencial de movilidad y biodisponibilidad de los metales Cr, Mn, Ni, Cu, Zn, Cd, As y Pb en sedimentos superficiales asociados al manglar en la CGSM, se analizaron sus contenidos en cuatro áreas con diferente grado... |
| Tipo: Journal Contribution |
Palavras-chave: Heavy metals; Sediments; Bioavailability. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4379 |
| |
|
|
| Wu,L; Huang,X; Shi,K; Tan,R. |
| Lutein supplements are often used to pigment and enrich layer chicken eggs. This experiment was conduced to compare the bioavailability of free and esterified lutein, by depletion method. Forty chickens were randomly divided into two groups. After 2 weeks of washout period, when all birds were fed the same low lutein basal diet, the two groups were fed for another 2 weeks with diets supplemented with free lutein or esterified lutein. Two experimental diets were supplemented with the same amount of 15 mg lutein/kg. On day 0 (baseline) and days 3, 7, and 14, birds fasting morning plasma samples were collected and stored for lutein analysis by high performance liquid chromatography method (HPLC). Results showed that: 1) Plasma lutein concentration increased... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioavailability; Depletion method; Free lutein; Layer hens; Lutein ester. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000200004 |
| |
|
|
| Vilela,Flávio Garcia; Zanetti,Marcus Antonio; Saran Netto,Arlindo; Freitas Júnior,José Esler de; Rennó,Francisco Palma; Venturelli,Beatriz Conte; Canaes,Taissa de Souza. |
| This research was conducted with objective to evaluate the effect of different zinc (Zn) sources and doses in the diet for Santa Ines sheep. Forty lambs at weaning, with 18.4 kg of body weight were supplemented with three different sources of zinc (zinc oxide (ZnO), zinc amino acid and zinc proteinate) and three doses of zinc (200, 400 and 600 mg/kg DM) added to the basal diet. At every 28 days, animals were weighted and blood samples were collected for analyses of zinc (Zn), alkaline phosphatase and immunoglobulin G (IgG) and M (IgM). At the end of experiment, liver samples were collected for determination of the hepatic zinc levels. Zinc was analyzed with atomic absorption spectrophotometer, while phosphatase alkaline and immunoglobulins G and M were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioavailability; Immunoglobulin; Lambs; Minerals. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900023 |
| |
|
|
| Fuentes,Bárbara; Bolan,Nanthi; Naidu,Ravi; Mora,María de la Luz. |
| Increases in the generation of organic wastes, in addition to decreases in natural resources, make it necessary to recycle these waste materials. In soils, the application of wastes as organic fertilizers, allows to reincorporate nutrients to the biogeochemical cycles. The application of wastes in agriculture has carried out with it problems associated with phosphorus (P) overapplication in soils and contamination of water bodies. Phosphorus inside the waste matrix forms organic and inorganic compounds which have different bioavailabilities. The more important factors that influence the bioavailability of P in soils, organic wastes and soil-organic waste amendments are: the soil solution pH, adsorption reactions, organic matter, phosphatase activity and... |
| Tipo: Journal article |
Palavras-chave: Phosphorus; Bioavailability; Compost; Manure. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912006000200006 |
| |
|
|
| RAMOS FARÍAS MORENO,SILVANA; ARNOBIO,ADRIANO; CARVALH0,JORGE JOSÉ DE; NASCIMENT0,LUCIA; OLIVEIRA TIMOTEO,MARGARETH; OLEJ,BENI; KAZAN ROCHA,EMELY; PEREIRA,MARIO; BERNARDO-FILH0,MARIO; QUERINO DE ARAÚJO CALDAS,LUIZ. |
| The radiobiocomplexes labeled with technetium-99m (Tc-99m) have been widely used in nuclear medicine in single photon emission computed tomography and in basic research. The aim of this study was to assess the influence of a Nectandra membranácea extract on the bioavailability of the sodium pertechnetate (Na99mTc0(4)) radiobiocomplex in rat organs. The animals were treated with a N. membranácea extract (30 mg/ ml), for 6 days. Na99mTc0(4) was injected, the organs were isolated and weighed, and the radioactivity was determined in each organ (%ATI/organ). The %ATI/organ was divided by the mass of each organ to calculate the %ATI/g. A significant increase of the %ATI/organ of Na99mTc0(4) was observed in muscle and thyroid as well as in the %ATI/g in the... |
| Tipo: Journal article |
Palavras-chave: Nectandra membranácea; Bioavailability; Sodium pertechnetate; Radiobiocomplex. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000200004 |
| |
|
|
| CROZIER,ALAN; BURNS,JENNIFER; AZIZ,AZLINA A; STEWART,AMANDA J; RABIASZ,HELENA S; JENKINS,GARETH I; EDWARDS,CHRISTINE A; LEAN,MICHAEL EJ. |
| Flavonols are polyphenolic secondary plant metabolites that are present in varying levels in commonly consumed fruits, vegetables and beverages. Flavonols have long held an interest for nutritionists, which has increased following a Dutch study in the early 1990s showing that dietary intake of flavonols was inversely correlated with the incidence of coronary heart disease. The main factors that have hindered workers in the field of flavonol research are (i) the accurate measurement of these compounds in foods and biological samples, and (ii) a dearth of information on their absorption and metabolism. This review aims to highlight the work of the authors in attempting to clarify the situation. The sensitive and selective HPLC procedure to identify and... |
| Tipo: Journal article |
Palavras-chave: Bioavailability; Dietary antioxidants; Flavones; Flavonols; HPLC analysis. |
| Ano: 2000 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000200007 |
| |
|
|
| Bernardo-Filho,Mario; Santos-Filho,Sebastião David; Moura,Egberto Gaspar de; Maiworm,Adalgisa Ieda; Orlando,Margarida Maria de Camões; Penas,Maria Expósito; Cardoso,Valbert Nascimento; Bernardo,Luciana Camargo; Brito,Lavínia de Carvalho. |
| Clinical images are worthwhile in Health Sciences and their analysis and correct interpretation aid the professionals,such as physicians, physiotherapists and occupational therapists, to make decisions and take subsequent therapeutic and/or rehabilitation measures. Other factors, besides the state of the disease, may interfere and affect the bioavailability of the radiopharmaceuticals (radiobiocomplexes) and the quality of the SPECT and PET images. Furthermore, the labeling of some of these radiobiocomplexes, such as plasma proteins, white blood cells and red blood cells, with 99mT, can also be modified. These factors include drugs (synthetic and natural) and dietary conditions, as well as some medical procedures (invasive or non-invasive), such as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drug interaction; Blood constituents; Radiobiocomplexes; Bioavailability. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000700003 |
| |
|
| |
| Registros recuperados: 28 | |
|
|
|
