WTS database

Title Sort descending	Pub Year	Author	SearchLink
Soil factors controlling mineral N uptake by Picea engelmannii seedlings: the importance of gross NH4+ production rates	2005	Departement de Biologie, Universite de Sherbrooke, Sherbrooke, Quebec, J1K 2R1, Canada.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full The New phytologist Periodical, Abbrev. New Phytol. Pub Date Free Form Mar Volume 165 Issue 3 Start Page 791 Other Pages 799 Notes LR: 20151119; JID: 9882884; 0 (Minerals); 0 (Nitrates); 0 (Quaternary Ammonium Compounds); 0 (Soil); N762921K75 (Nitrogen); ppublish Place of Publication England ISSN/ISBN 0028-646X; 0028-646X Accession Number PMID: 15720690 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI NPH1289 [pii] Output Language Unknown(0) PMID 15720690 Abstract * Hydroponic studies suggest that plant nitrogen (N) demand determines the rate of mineral N uptake; however, field observations show N limitation to be widespread. Field experiments are needed to understand soil factors controlling mineral N uptake. * We planted Picea engelmannii seedlings that had initially been grown from sterilized seeds, on a recently clearcut site. We applied a hybrid isotope dilution/pulse labelling technique to compare the gross production rate, concomitantly to the plant uptake rate, of soil mineral N. We also measured mineral N concentrations, microbial N, and percent ectomycorrhizal root tips. * Gross NH4+ production rate was the most important determinant of plant uptake rate. Exploratory path analysis suggested that plant uptake was also determined by microbial N, which was, in turn, determined by soil mineral N concentrations. Percent ectomycorrhizal root tips was negatively related to gross NO3- production rate and microbial N concentrations. * We conclude that nutrient flux density is important in controlling plant uptake. Mycorrhizal colonization may alter N dynamics in the rhizosphere without affecting mineral N uptake by seedlings. Descriptors Biological Transport, Active, Minerals/metabolism, Nitrates/metabolism, Nitrogen/metabolism, Picea/metabolism, Plant Roots/metabolism, Quaternary Ammonium Compounds/metabolism, Seedlings/metabolism, Soil/analysis Links Book Title Database Publisher Data Source Authors Grenon,F., Bradley,R. L., Jones,M. D., Shipley,B., Peat,H. Original/Translated Title URL Date of Electronic PMCID Editors
Soil solution chemistry in a southeast Alaska spodosol suggests positively charged organic compounds	1984	Stednick, J.D., Department of Earth Resources, Colorado State University, Fort Collins, CO 80523	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Water, air, and soil pollution Periodical, Abbrev. Water Air Soil Pollut. Pub Date Free Form 1984/10 Volume 23 Issue 3 Start Page 263 Other Pages 269 Notes Place of Publication ISSN/ISBN 0049-6979 Accession Number Language SubFile DOI Output Language Unknown(0) PMID Abstract Soil solution chemistry was sampled for 2 yr in a mature Sitka spruce - western hemlock (Picea sitchensis (Bong) Carr. Tsuga heterophylla (Raf.) Sarg) forest on a Dystric Cryandept (Spodosol) soil. Electroneutrality balances indicated a cation deficit at all soil solution sampling points. Calculated soil solution electrical conductivity was less than measured electrical conductivity, with differences greater than expected measurement errors. Soil solutions and streamflow were colored by organics, as measured by P.C.U.s. It is suggested that organic acids or other organic compounds may be positively charged in northern Spodosols. Descriptors organic compound, leaching, nonhuman, priority journal, soil, theoretical study Links Book Title Database Embase Publisher Data Source Embase Authors Stednick,J. D. Original/Translated Title URL Date of Electronic PMCID Editors
Soil temperature and plant growth stage influence nitrogen uptake and amino acid concentration of apple during early spring growth	2001	Department of Horticulture, Oregon State University, Corvallis, OR 97331, USA.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Tree physiology Periodical, Abbrev. Tree Physiol. Pub Date Free Form May Volume 21 Issue 8 Start Page 541 Other Pages 547 Notes LR: 20131121; JID: 100955338; 0 (Amino Acids); 0 (Soil); N762921K75 (Nitrogen); ppublish Place of Publication Canada ISSN/ISBN 0829-318X; 0829-318X Accession Number PMID: 11359712 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; IM DOI Output Language Unknown(0) PMID 11359712 Abstract In spring, nitrogen (N) uptake by apple roots begins about 3 weeks after bud break. We used 1-year-old 'Fuji' Malus domestica Borkh on M26 bare-root apple trees to determine whether the onset of N uptake in spring is dependent solely on the growth stage of the plant or is a function of soil temperature. Five times during early season growth, N uptake and total amino acid concentration were measured in trees growing at aboveground day/night temperatures of 23/15 degrees C and belowground temperatures of 8, 12, 16 or 20 degrees C. We used (15NH4)(15NO3) to measure total N uptake and rate of uptake and found that both were significantly influenced by both soil temperature and plant growth stage. Rate of uptake of 15N increased with increasing soil temperature and changed with plant growth stage. Before bud break, 15N was not detected in trees growing in the 8 degrees C soil treatment, whereas 15N uptake increased with increasing soil temperatures between 12 and 20 degrees C. Ten days after bud break, 15N was still not detected in trees growing in the 8 degrees C soil treatment, although total 15N uptake and uptake rate continued to increase with increasing soil temperatures between 12 and 20 degrees C. Twenty-one days after bud break, trees in all temperature treatments were able to acquire 15N from the soil, although the amount of uptake increased with increasing soil temperature. Distribution of 15N in trees changed as plants grew. Most of the 15N absorbed by trees before bud break (approximately 5% of 15N supplied per tree) remained in the roots. Forty-six days after bud break, approximately one-third of the 15N absorbed by the trees in the 12-20 degrees C soil temperature treatments remained in the roots, whereas the shank, stem and new growth contained about two-thirds of the 15N taken up by the roots. Total amino acid concentration and distribution of amino acids in trees changed with plant growth stage, but only the amino acid concentration in new growth and roots was affected by soil temperature. We conclude that a combination of low soil temperature and plant developmental stage influences the ability of apple trees to take up and use N from the soil in the spring. Thus, early fertilizer application in the spring when soil temperatures are low or when the aboveground portion of the tree is not actively growing may be ineffective in promoting N uptake. Descriptors Amino Acids/analysis/metabolism, Malus/growth & development/physiology, Nitrogen/metabolism/physiology, Plant Roots/chemistry, Plant Stems/chemistry, Seasons, Soil, Temperature, Trees/growth & development/physiology Links Book Title Database Publisher Data Source Authors Dong,S., Scagel,C. F., Cheng,L., Fuchigami,L. H., Rygiewicz,P. T. Original/Translated Title URL Date of Electronic PMCID Editors
Soil temperatures and heat loss for a hot water pipe network buried in irrigated soil	1976	Alpert, J.E., Pennsylvania State Univ., University Park, Pa. 16802	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of environmental quality Periodical, Abbrev. J.Environ.Qual. Pub Date Free Form 1976/10 Volume 5 Issue 4 Start Page 400 Other Pages 405 Notes Place of Publication ISSN/ISBN 0047-2425 Accession Number Language SubFile DOI Output Language Unknown(0) PMID Abstract A 0.09 ha field prototype of a simultaneous waste heat and waste water disposal system was constructed and instrumented. Data are reported for soil, pipe, soil surface, and air temperatures; heat loss (0.068-0.117 cal cm-2 min-1); and soil thermal conductivity (3.61-5.63 mcal [cm sec Â°C]-1). The data are used to evaluate the heat flow theory which is currently being used to predict the land area required for waste heat disposal with a buried hot water pipe network. Predicted heat loss was consistently lower than experimental heat losses. The results of the experiment indicate that substantial improvements need be made in the existing theory to account for the transient heat flow and heat storage. Descriptors energy conservation, lavage, mathematical model, model, recycling, soil, temperature, theoretical study, therapy, waste water management Links Book Title Database Embase Publisher Data Source Embase Authors Alpert,J. E., VanDemark,S. C., Fritton,D. D., DeWalle,D. R. Original/Translated Title URL Date of Electronic PMCID Editors
Solid-phase extraction combined with large volume injection-programmable temperature vaporization-gas chromatography-mass spectrometry for the multiresidue determination of priority and emerging organic pollutants in wastewater	2012	Department of Analytical Chemistry, Faculty of Science and Technology, University of the Basque Country-UPV/EHU, PK 644, 48080 Bilbao, Spain.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of chromatography.A Periodical, Abbrev. J.Chromatogr.A Pub Date Free Form 20-Jul Volume 1247 Issue Start Page 104 Other Pages 117 Notes CI: Copyright (c) 2012; JID: 9318488; 0 (Organic Chemicals); 0 (Water Pollutants, Chemical); 2012/02/27 [received]; 2012/04/16 [revised]; 2012/05/06 [accepted]; 2012/05/14 [aheadofprint]; ppublish Place of Publication Netherlands ISSN/ISBN 1873-3778; 0021-9673 Accession Number PMID: 22673809 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.1016/j.chroma.2012.05.022 [doi] Output Language Unknown(0) PMID 22673809 Abstract In the present work the simultaneous extraction for the multiresidue determination in wastewater samples of organic compounds such as polychlorinated biphenyls (PCBs), polybrominated biphenyls (PBBs), pesticides, polycyclic aromatic hydrocarbons (PAHs), phthalate esters (PEs), alkylphenols (APs), bisphenol A (BPA) or hormones included in different lists of priority and emerging pollutants because of their action as endocrine disrupting compounds (EDCs) was developed. Different solid phase extraction (SPE) variables such as the nature of the solid phase (Oasis-HLC, C18 and Lichrolut), the sample volume, the addition of MeOH and NaCl, the pH of the water phase and the volume of the eluent solvent were optimized in order to analyze simultaneously the priority and emerging families of pollutants mentioned above. Good recoveries were obtained for Milli-Q water (80-120%), however, since the use of deuterated analogues and dilution of the sample did not correct the matrix effect, additional SPE clean-up step using Florisil(R) cartridges was necessary to obtain good results for wastewater samples (80-125%). In order to improve the limits of detection (LODs), large volume injection (LVI) using programmable temperature vaporizer (PTV) coupled to gas chromatography-mass spectrometry (GC-MS) was also optimized. Since analytes losses in the case of the most volatile congeners occurred during the derivatization step and no separation of the derivatized and the non-derivatized analytes was possible during SPE elution, two different injections were optimized for each analyte group. LODs were in good agreement with those found in the literature and relative standard deviations (RSDs) were in the 10-25% range for Milli-Q and 12-30% for wastewater samples. The method was finally applied to the determination of target analytes in three different wastewater treatment plants (WWTPs, Bakio, Gernika and Galindo (Spain)) and in one water purification plant (WPP) in Zornotza (Spain). Descriptors Links Book Title Database Publisher Elsevier B.V Data Source Authors Bizkarguenaga,E., Ros,O., Iparraguirre,A., Navarro,P., Vallejo,A., Usobiaga,A., Zuloaga,O. Original/Translated Title URL Date of Electronic 20120514 PMCID Editors
Solid-phase extraction with C30 bonded silica for analysis of polycyclic aromatic hydrocarbons in airborne particulate matters by gas chromatography-mass spectrometry	2007	Department of Chemistry, Tsinghua University, Beijing 100084, China.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of chromatography.A Periodical, Abbrev. J.Chromatogr.A Pub Date Free Form 22-Jun Volume 1154 Issue 2-Jan Start Page 74 Other Pages 80 Notes LR: 20090115; JID: 9318488; 0 (Air Pollutants); 0 (Polycyclic Hydrocarbons, Aromatic); 7631-86-9 (Silicon Dioxide); 2007/02/15 [received]; 2007/03/29 [revised]; 2007/03/30 [accepted]; 2007/04/06 [aheadofprint]; ppublish Place of Publication Netherlands ISSN/ISBN 0021-9673; 0021-9673 Accession Number PMID: 17459395 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI S0021-9673(07)00657-7 [pii] Output Language Unknown(0) PMID 17459395 Abstract A solid-phase extraction (SPE) method using triacontyl bonded silica (C30) as sorbent was developed for the determination of 16 US Environmental Protection Agency polycyclic aromatic hydrocarbons (PAHs) in airborne particulate matters quantitatively by gas chromatography-mass spectrometry (GC-MS). Optimization experiments were conducted using spiked standard aqueous solution of PAHs and real airborne particulates samples aiming to obtain highest SPE recoveries and extraction efficiency. Factors were studied in SPE procedures including the concentration of organic modifier, flow rate of sample loading and elution solvents. The ultrasonication time and solvents were also investigated. Recoveries were in the range of 68-107% for standard PAHs aqueous solution and 61-116% for real spiked sample. Limits of detection (LODs) and limits of quantification (LOQs) with standard solution were in the range of 0.0070-0.21 microgL(-1) and 0.022-0.67 microgL(-1), respectively. The optimized method was successfully applied to the determination of 16 PAHs in real airborne particulate matters. Descriptors Air Pollutants/analysis, Gas Chromatography-Mass Spectrometry/methods, Polycyclic Hydrocarbons, Aromatic/analysis, Silicon Dioxide, Solid Phase Extraction/methods Links Book Title Database Publisher Data Source Authors Li,K., Li,H., Liu,L., Hashi,Y., Maeda,T., Lin,J. M. Original/Translated Title URL Date of Electronic 20070406 PMCID Editors
Solid-phase microextraction for the enantiomeric analysis of flavors in beverages	2001	University of California, Davis, Department of Viticulture and Enology, 95616, USA.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of AOAC International Periodical, Abbrev. J.AOAC Int. Pub Date Free Form Mar-Apr Volume 84 Issue 2 Start Page 479 Other Pages 485 Notes LR: 20080317; JID: 9215446; 0 (Flavoring Agents); ppublish Place of Publication United States ISSN/ISBN 1060-3271; 1060-3271 Accession Number PMID: 11324614 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI Output Language Unknown(0) PMID 11324614 Abstract Solid-phase microextraction combined with gas chromatographic/mass spectrometric analysis and separation on a chiral cyclodextrin stationary phase was a rapid, reliable technique for profiling chiral aroma compounds in flavored alcoholic beverages. Several enantiomeric terpenes, esters, alcohols, norisoprenoids, and lactones were identified in berry-, peach-, strawberry-, and citrus-flavored wine and malt beverages (wine coolers). Using this technique, we were able to confirm the addition of synthetic flavoring to several beverages, consistent with label designations. Descriptors Alcoholic Beverages/analysis, Beverages/analysis, Flavoring Agents/analysis, Gas Chromatography-Mass Spectrometry, Stereoisomerism, Wine/analysis Links Book Title Database Publisher Data Source Authors Ebeler,S. E., Sun,G. M., Datta,M., Stremple,P., Vickers,A. K. Original/Translated Title URL Date of Electronic PMCID Editors
Solid-phase microextraction measurement of parent and alkyl polycyclic aromatic hydrocarbons in milliliter sediment pore water samples and determination of K(DOC) values	2005	Energy and Environmental Research Center, University of North Dakota, Grand Forks, North Dakota 58202, USA. shawthorne@undeerc.org	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Environmental science & technology Periodical, Abbrev. Environ.Sci.Technol. Pub Date Free Form 15-Apr Volume 39 Issue 8 Start Page 2795 Other Pages 2803 Notes LR: 20121115; JID: 0213155; 0 (Benzopyrenes); 0 (Colloids); 0 (Fluorenes); 0 (Organic Chemicals); 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Water Pollutants, Chemical); 360UOL779Z (fluoranthene); 7440-44-0 (Carbon); ppublish Place of Publication United States ISSN/ISBN 0013-936X; 0013-936X Accession Number PMID: 15884378 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; IM DOI Output Language Unknown(0) PMID 15884378 Abstract The U.S. Environmental Protection Agency (EPA) narcosis model for benthic organisms in polycyclic aromatic hydrocarbon (PAH) contaminated sediments requires the measurement of 18 parent PAHs and 16 groups of alkyl PAHs ("34" PAHs) in pore water with desired detection limits as low as nanograms per liter. Solid-phase microextraction (SPME) with gas chromatographic/mass spectrometric (GC/ MS) analysis can achieve such detection limits in small water samples, which greatly reduces the quantity of sediment pore water that has to be collected, shipped, stored, and prepared for analysis. Four sediments that ranged from urban background levels (50 mg/kg total "34" PAHs) to highly contaminated (10 000 mg/kg total PAHs) were used to develop SPME methodology for the "34" PAH determinations with only 1.5 mL of pore water per analysis. Pore water was obtained by centrifuging the wet sediment, and alum flocculation was used to remove colloids. Quantitative calibration was simplified by adding 15 two- to six-ring perdeuterated PAHs as internal standards to the water calibration standards and the pore water samples. Response factors for SPME followed by GC/MS were measured for 22 alkyl PAHs compared to their parent PAHs and used to calibrate for the 18 groups of alkyl PAHs. Dissolved organic carbon (DOC) ranging from 4 to 27 mg/L had no measurable effect on the freely dissolved concentrations of two- and three-ring PAHs. In contrast, 5-80% of the total dissolved four- to six-ring PAHs were associated with the DOC rather than being freely dissolved, corresponding to DOC/water partitioning coefficients (K(DOC)) with log K(DOC) values ranging from 4.1 (for fluoranthene) to 5.6 (for benzo[ghi]perylene). However, DOC-associated versus freely dissolved PAHs had no significant effect on the total "34" PAH concentrations or the sum of the "toxic units" (calculated bythe EPA protocol), since virtually all (86-99%) of the dissolved PAH concentrations and toxic units were contributed by two- and three-ring PAHs. Descriptors Benzopyrenes/analysis, Calibration, Carbon/analysis, Colloids/isolation & purification, Environmental Monitoring/methods, Flocculation, Fluorenes/analysis, Gas Chromatography-Mass Spectrometry, Geologic Sediments/analysis/chemistry, Nanotechnology, Organic Chemicals/analysis, Polycyclic Hydrocarbons, Aromatic/analysis, Porosity, Water Pollutants, Chemical/analysis Links Book Title Database Publisher Data Source Authors Hawthorne,S. B., Grabanski,C. B., Miller,D. J., Kreitinger,J. P. Original/Translated Title URL Date of Electronic PMCID Editors
Solid-phase microextraction to monitor the sonochemical degradation of polycyclic aromatic hydrocarbons in water	2003	Department of Environmental Engineering, Technical University of Crete, Polytechneioupolis, GR-73100 Chania, Greece. epsilaki@mred.tuc.gr	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of environmental monitoring : JEM Periodical, Abbrev. J.Environ.Monit. Pub Date Free Form Feb Volume 5 Issue 1 Start Page 135 Other Pages 140 Notes LR: 20061115; JID: 100968688; 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Water Pollutants, Chemical); ppublish Place of Publication England ISSN/ISBN 1464-0325; 1464-0325 Accession Number PMID: 12619768 Language eng SubFile Journal Article; IM DOI Output Language Unknown(0) PMID 12619768 Abstract Solid-phase microextraction (SPME) coupled with GC-MS has been used to monitor the degradation of polycyclic aromatic hydrocarbons (PAHs) by ultrasound treatment. Immersion SPME sampling enabled the fast and solventless extraction of target contaminants at the low microg l(-1) concentration level. The developed protocol was found to be linear in the concentration range from 0.1 to 50 microg l(-1) for most target analytes, with the limits of detection ranging between 0.01 and 0.70 microg l(-1) and the relative standard deviations between 4.31 and 27%. The developed SPME protocol was used to follow concentration profiles of aqueous solutions containing 16 PAHs, which were subject to low frequency ultrasonic irradiation. At the conditions employed in this study (80 kHz of ultrasound frequency, 130 W l(-1) of applied electric power density, 30 microg l(-1) of initial concentration for each of the 16 PAHs), sonochemical treatment was found capable of destroying the lower molecular weight PAHs (naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene and pyrene) within 120-180 min of irradiation. The higher molecular weight PAHs were more recalcitrant to ultrasound treatment. Descriptors Environmental Monitoring/methods, Gas Chromatography-Mass Spectrometry, Molecular Weight, Polycyclic Hydrocarbons, Aromatic/analysis/chemistry, Ultrasonics, Water Pollutants, Chemical/analysis, Water Purification/methods Links Book Title Database Publisher Data Source Authors Psillakis,E., Ntelekos,A., Mantzavinos,D., Nikolopoulos,E., Kalogerakis,N. Original/Translated Title URL Date of Electronic PMCID Editors
Solid-phase microextraction-gas chromatographic-tandem mass spectrometric analysis of polycyclic aromatic hydrocarbons. Towards the European Union water directive 2006/0129 EC	2007	Department of Analytical Chemistry, University of A Coruna, Campus da Zapateira, E-15071 A Coruna, Spain.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of chromatography.A Periodical, Abbrev. J.Chromatogr.A Pub Date Free Form 28-Dec Volume 1176 Issue 2-Jan Start Page 48 Other Pages 56 Notes LR: 20090115; JID: 9318488; 0 (Polycyclic Compounds); 0 (Water Pollutants, Chemical); 2007/08/16 [received]; 2007/10/31 [revised]; 2007/11/02 [accepted]; 2007/11/09 [aheadofprint]; ppublish Place of Publication Netherlands ISSN/ISBN 0021-9673; 0021-9673 Accession Number PMID: 18037429 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI S0021-9673(07)01924-3 [pii] Output Language Unknown(0) PMID 18037429 Abstract This article presents a solid-phase microextraction (SPME) procedure to determine 27 parent and alkylated polycyclic aromatic hydrocarbons (PAHs) with diverging polarities and molecular masses in various types of water samples (tap, well, superficial, and seawater). A 65-microm polydimethylsiloxane-divinylbenzene (PDMS/DVB) fiber was used, and parameters affecting the extraction procedures such as extraction temperature and time, desorption temperature and time, splitless time, effect of an organic modifier or ionic adjustment were studied. The linearity and precision of the proposed method were satisfactory. The use of GC-MS determination in the full scan mode, in the selected ion monitoring (SIM) mode, and in the GC-MS-MS mode provided the unequivocal identification and quantification of the target analytes. Moreover, the proposed SPME-GC-MS-MS method, extracting only 18 ml of sample, reached the very restrictive limits fixed by the 2006/0129 EC proposal for a new water directive to be achieved by 2015. The matrix effects were evaluated through the analysis of tap, well, superficial, and seawater. A discussion on different behaviors, a result of the matrix effects, was included. Analytical recoveries were satisfactory in all cases. The novelty of this work consisted in the wide range of analyzed PAHs, the very low detection limits that were reached, the coupling of SPME-GC-MS-MS, and the study of the matrix effect on water samples. With this developed procedure, detection limits between 0.07 and 0.76 ng l(-1) and quantification limits between 0.10 and 0.98 ng l(-1) were obtained with MS-MS detection. Moreover, the analytical recoveries for different aqueous matrices were near 100% in all cases. Descriptors European Union, Gas Chromatography-Mass Spectrometry/methods, Hydrogen-Ion Concentration, Osmolar Concentration, Polycyclic Compounds/analysis, Tandem Mass Spectrometry/methods, Water Pollutants, Chemical/analysis Links Book Title Database Publisher Data Source Authors Fernandez-Gonzalez,V., Concha-Grana,E., Muniategui-Lorenzo,S., Lopez-Mahia,P., Prada-Rodriguez,D. Original/Translated Title URL Date of Electronic 20071109 PMCID Editors

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