1
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Bueno M, Haag R, Heeb N, Mikhailenko P, Boesiger L, Poulikakos LD. Functional and environmental performance of plant-produced crumb rubber asphalt mixtures using the dry process. Mater Struct 2021; 54:194. [PMID: 34720657 PMCID: PMC8545782 DOI: 10.1617/s11527-021-01790-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 09/16/2021] [Indexed: 06/13/2023]
Abstract
Incorporating crumb rubber (CR) using the dry process, directly in the asphalt mixture rather than into the bituminous binder requires no plant retrofitting, and therefore is the most practical industrial method for CR incorporation into asphalt mixtures. Nevertheless, very few large scale studies have been conducted. This work uses a holistic approach and reports on the functional and environmental performance of asphalt mixtures with different concentrations of CR fabricated employing the dry process in asphalt plants. Gaseous emissions were monitored during the production and laboratory leaching tests simulating the release of pollutants during rain, was conducted to evaluate the toxicology of both the CR material alone and the modified asphalt mixtures. In addition, laboratory compacted samples were tested to assess their fatigue behavior. Furthermore, noise relevant surface properties of large roller compacted slabs were evaluated before and after being subjected to a load simulator (MMLS3) to evaluate their resistance to permanent deformation. The results confirm that comparable performance can be achieved with the incorporation of CR using the dry process for high performance surfaces such as semi-dense asphalt, which usually require the use of polymer modified binders. Environmental performance improvement can be achieved by a washing step of the CR material that could remove polar CR additives which have commonly been used as vulcanization accelerator during rubber production.
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Affiliation(s)
- M. Bueno
- Empa, Swiss Federal Laboratories for Material Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - R. Haag
- Empa, Swiss Federal Laboratories for Material Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - N. Heeb
- Empa, Swiss Federal Laboratories for Material Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - P. Mikhailenko
- Empa, Swiss Federal Laboratories for Material Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | | | - L. D. Poulikakos
- Empa, Swiss Federal Laboratories for Material Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
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2
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Mhanna R, Naveau A, Bueno M, Shmeit M, Ismail F, Fontaine C, Porel G, Bassil J, Caner L. Concomitant behavior of arsenic and selenium from the karst infillings materials of the fractured carbonate Dogger Aquifer (Hydrogeological Experimental Site, Poitiers, France). Chemosphere 2021; 275:129935. [PMID: 33667770 DOI: 10.1016/j.chemosphere.2021.129935] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 01/29/2021] [Accepted: 02/07/2021] [Indexed: 06/12/2023]
Abstract
Petrographic and mineralogical analyses combined with sequential extractions and leaching experiments as a function of pH were performed on black clayey sediments fulfilling karsts in the Hydrogeological Experimental Site (HES) of Poitiers (France) to investigate the behavior of arsenic and selenium in a fractured limestone aquifer. Sequential extractions showed that arsenic is mainly associated with pyrite (about 35%) and secondary iron oxyhydroxides (around 13%), along with a substantial exchangeable fraction (about 13%). The soluble fraction and the fraction associated to organic matter are ∼2% and ∼5%, respectively. The distribution of selenium is mainly pyritic (around 39%) or associated with organic matter (about 18%). Its association to secondary iron oxyhydroxides minerals is low (around 2%), whereas its soluble fraction is around 5%. SEM analyses revealed the presence of arsenic "hot spots" into euhedral pyrite crystals surrounded by a halo of iron oxyhydroxides resulting from their alteration, and both are enriched with arsenic. Selenium has a similar pyritic origin but after alteration, it is predominantly associated with organic matter. Despite different distributions, the leaching experiment as a function of pH showed that the mobilization of arsenic and selenium overlapped below pH 2 and above pH 8. The main differences were observed between pH 2 and 8 with a plateau at 5% of released selenium, whereas the amount of mobilized arsenic continuously decreased. The pH-dependence of both elements is attributed to the partial dissolution of pyrite in acidic conditions combined with desorption processes at higher pH values.
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Affiliation(s)
- R Mhanna
- Université de Poitiers, UMR 7285 IC2MP-HydrASA, TSA 51106, 5 Rue Albert Turpain, 86073, Poitiers Cedex 9, France.
| | - A Naveau
- Université de Poitiers, UMR 7285 IC2MP-HydrASA, TSA 51106, 5 Rue Albert Turpain, 86073, Poitiers Cedex 9, France
| | - M Bueno
- CNRS/Univ. Pau & Pays de L'Adour/E2S UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour L'Environnement et Les Matériaux (IPREM), UMR 5254, 64053, Pau, France
| | - M Shmeit
- Université de Poitiers, UMR 7285 IC2MP-HydrASA, TSA 51106, 5 Rue Albert Turpain, 86073, Poitiers Cedex 9, France
| | - F Ismail
- Université de Poitiers, UMR 7285 IC2MP-HydrASA, TSA 51106, 5 Rue Albert Turpain, 86073, Poitiers Cedex 9, France
| | - C Fontaine
- Université de Poitiers, UMR 7285 IC2MP-HydrASA, TSA 51106, 5 Rue Albert Turpain, 86073, Poitiers Cedex 9, France
| | - G Porel
- Université de Poitiers, UMR 7285 IC2MP-HydrASA, TSA 51106, 5 Rue Albert Turpain, 86073, Poitiers Cedex 9, France
| | - J Bassil
- L2GE, Lebanese University, Faculty of Sciences 2, Fanar, Matn, Lebanon
| | - L Caner
- Université de Poitiers, UMR 7285 IC2MP-HydrASA, TSA 51106, 5 Rue Albert Turpain, 86073, Poitiers Cedex 9, France
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Hurst WJ, Martin RA, Bueno M, Clemente H, DeVries JW, Levi C, Li B, Popovich DJ, Sheeley R, Schumacher D, Stewart K, Taylor J, Toomey P. High Performance Liquid Chromatographic Determination of Carbohydrates in Chocolate: Collaborative Study. J AOAC Int 2020. [DOI: 10.1093/jaoac/63.3.595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
A collaborative study determining sucrose, glucose, fructose, maltose, and lactose in chocolate products was conducted using a previously published high performance liquid chromatographic (HPLC) method. Five samples (2 milk chocolates, 1 dark chocolate, 1 powdered mix, and 1 sirup) were analyzed in duplicate by 7 collaborators. The results indicate adequate method precision. In addition, the HPLC method allows for the simultaneous determination of 5 saccharides in chocolate products in 15 min. The method has been adopted as official first action.
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Affiliation(s)
- W Jeffrey Hurst
- Hershey Foods Corp., Research Laboratories, PO Box 54, Hershey, PA 17033
| | - Robert A Martin
- Hershey Foods Corp., Research Laboratories, PO Box 54, Hershey, PA 17033
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Sliva MG, Sanders JK, Arendsen M, Baars A, Bhandari S, Boerma B, Broge J, Bueno M, Cherix G, Gates G, Hollembaek J, Kaufman M, Kraft C, Oerl L, Santos A, Schuep W, Wehrmann J. Vitamin D in Infant Formula and Enteral Products by Liquid Chromatography: Collaborative Study. J AOAC Int 2020. [DOI: 10.1093/jaoac/79.1.73] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Results from a collaborative study of a new liquid chromatographic (LC) method for determination ofvitamin D in infant formulas and enteral products are presented. Each of 15 laboratories was provided with 11 blind duplicate samples covering a range ofapproximately 200-500 International Units/quart (normal dilution), a system suitability sample, and the U.S. Pharmacopeia ergo- and cholecalciferol standards. Product types included liquid and powder forms of milk (whey and casein), soy, and hydrolyzed protein-based infant formulas and enteral products. The method includes a single liquid-liquid extraction following saponification, solid-phase extraction,and then concentration by evaporation. An isocratic, nonaqueous, chromatographic system with reversed-phase, zero end- capped C18 column, and UV detector set at 265 nm are used. Statistical evaluation ofdata from participating laboratories showthe average reproducibility and repeatability of the method across all samples to be excellent, with RSDR and RSDr values of 13.48 and 9.44, respectively, after elimination of out liers. The LC method for determination of vitamin D in infant formulas and enteral products has been adopted by AOAC INTERNATIONAL.
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Affiliation(s)
- Matthew G Sliva
- Bristol-Myers Squibb, 2400 W Lloyd Expressway, Evansville, IN 47721
| | - James K Sanders
- Bristol-Myers Squibb, 2400 W Lloyd Expressway, Evansville, IN 47721
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Villagrasa C, Bordage MC, Bueno M, Bug M, Chiriotti S, Gargioni E, Heide B, Nettelbeck H, Parisi A, Rabus H. ASSESSING THE CONTRIBUTION OF CROSS-SECTIONS TO THE UNCERTAINTY OF MONTE CARLO CALCULATIONS IN MICRO- AND NANODOSIMETRY. Radiat Prot Dosimetry 2019; 183:11-16. [PMID: 30544197 DOI: 10.1093/rpd/ncy240] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Indexed: 05/25/2023]
Abstract
Within EURADOS Working Group 6 'Computational Dosimetry', the micro and nanodosimetry task group 6.2 has recently conducted a Monte Carlo (MC) exercise open to participants around the world. The aim of this exercise is to quantify the contribution to the uncertainty of micro and nanodosimetric simulation results arising from the use of different electron-impact cross-sections, and hence physical models, employed by different MC codes (GEANT4-DNA, PENELOPE, MCNP6, FLUKA, NASIC and PHITS). Comparison of the participants' simulation results for both micro and nanodosimetric quantities using different MC codes was the first step of the exercise. The deviation between results is due to different cross-sections but also different tracking methods and particle transport cut-off energies. The second step of the exercise will involve using identical cross-section datasets to account only for the other variations in the first step, thus enabling the determination of the uncertainty contribution due to different cross-sections. This paper presents a comparison of the MC simulation results obtained in the first part of the exercise. For the microdosimetric simulations, particularly in the configuration where the electron source is contained within the micrometric target, the choice of MC code has a small influence on the results. For the nanodosimetric results, on the other hand, the mean ionisation cluster size distribution (ICSD) was sensitive to the physical models used in the MC codes. The ICSD was therefore chosen to study the influence of different cross-section data on the uncertainty of simulation results.
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Affiliation(s)
- C Villagrasa
- Institut de Radioprotection et Sûreté nucléaire (IRSN), BP-17, Fontenay-aux-Roses, France
| | - M-C Bordage
- CRCT, UMR 1037 INSERM, Université Toulouse III-Paul Sabatier, UMR 1037 CRCT, Toulouse, France
| | - M Bueno
- Institut de Radioprotection et Sûreté nucléaire (IRSN), BP-17, Fontenay-aux-Roses, France
| | - M Bug
- Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, Braunschweig, Germany
| | - S Chiriotti
- Belgian Nuclear Research Centre (SCK-CEN), Boeretang 200, Mol, Belgium
| | - E Gargioni
- Universitätsklinikum Hamburg-Eppendorf (UKE), Martinistrasse 52, Hamburg, Germany
| | - B Heide
- Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Karlsruhe, Germany
| | - H Nettelbeck
- Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, Braunschweig, Germany
| | - A Parisi
- Belgian Nuclear Research Centre (SCK-CEN), Boeretang 200, Mol, Belgium
| | - H Rabus
- Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, Braunschweig, Germany
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6
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Tang N, Bueno M, Meylan S, Incerti S, Tran HN, Vaurijoux A, Gruel G, Villagrasa C. Influence of chromatin compaction on simulated early radiation-induced DNA damage using Geant4-DNA. Med Phys 2019; 46:1501-1511. [DOI: 10.1002/mp.13405] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 01/07/2019] [Accepted: 01/21/2019] [Indexed: 11/11/2022] Open
Affiliation(s)
- N. Tang
- IRSN; Institut de Radioprotection et de Sûreté Nucléaire; BP17 92262 Fontenay aux Roses France
| | - M. Bueno
- IRSN; Institut de Radioprotection et de Sûreté Nucléaire; BP17 92262 Fontenay aux Roses France
| | - S. Meylan
- SymAlgo Technologies; 75 rue Léon Frot 75011 Paris France
| | - S. Incerti
- Université de Bordeaux CNRS/IN2P3 Centre d'Etudes Nucléaires de Bordeaux; Gradignan CENBG; chemin du solarium, BP120 33175 Gradignan France
| | - H. N. Tran
- IRSN; Institut de Radioprotection et de Sûreté Nucléaire; BP17 92262 Fontenay aux Roses France
| | - A. Vaurijoux
- IRSN; Institut de Radioprotection et de Sûreté Nucléaire; BP17 92262 Fontenay aux Roses France
| | - G. Gruel
- IRSN; Institut de Radioprotection et de Sûreté Nucléaire; BP17 92262 Fontenay aux Roses France
| | - C. Villagrasa
- IRSN; Institut de Radioprotection et de Sûreté Nucléaire; BP17 92262 Fontenay aux Roses France
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7
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Schuemann J, McNamara AL, Warmenhoven JW, Henthorn NT, Kirkby KJ, Merchant MJ, Ingram S, Paganetti H, Held KD, Ramos-Mendez J, Faddegon B, Perl J, Goodhead DT, Plante I, Rabus H, Nettelbeck H, Friedland W, Kundrát P, Ottolenghi A, Baiocco G, Barbieri S, Dingfelder M, Incerti S, Villagrasa C, Bueno M, Bernal MA, Guatelli S, Sakata D, Brown JMC, Francis Z, Kyriakou I, Lampe N, Ballarini F, Carante MP, Davídková M, Štěpán V, Jia X, Cucinotta FA, Schulte R, Stewart RD, Carlson DJ, Galer S, Kuncic Z, Lacombe S, Milligan J, Cho SH, Sawakuchi G, Inaniwa T, Sato T, Li W, Solov'yov AV, Surdutovich E, Durante M, Prise KM, McMahon SJ. A New Standard DNA Damage (SDD) Data Format. Radiat Res 2018; 191:76-92. [PMID: 30407901 DOI: 10.1667/rr15209.1] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Our understanding of radiation-induced cellular damage has greatly improved over the past few decades. Despite this progress, there are still many obstacles to fully understand how radiation interacts with biologically relevant cellular components, such as DNA, to cause observable end points such as cell killing. Damage in DNA is identified as a major route of cell killing. One hurdle when modeling biological effects is the difficulty in directly comparing results generated by members of different research groups. Multiple Monte Carlo codes have been developed to simulate damage induction at the DNA scale, while at the same time various groups have developed models that describe DNA repair processes with varying levels of detail. These repair models are intrinsically linked to the damage model employed in their development, making it difficult to disentangle systematic effects in either part of the modeling chain. These modeling chains typically consist of track-structure Monte Carlo simulations of the physical interactions creating direct damages to DNA, followed by simulations of the production and initial reactions of chemical species causing so-called "indirect" damages. After the induction of DNA damage, DNA repair models combine the simulated damage patterns with biological models to determine the biological consequences of the damage. To date, the effect of the environment, such as molecular oxygen (normoxic vs. hypoxic), has been poorly considered. We propose a new standard DNA damage (SDD) data format to unify the interface between the simulation of damage induction in DNA and the biological modeling of DNA repair processes, and introduce the effect of the environment (molecular oxygen or other compounds) as a flexible parameter. Such a standard greatly facilitates inter-model comparisons, providing an ideal environment to tease out model assumptions and identify persistent, underlying mechanisms. Through inter-model comparisons, this unified standard has the potential to greatly advance our understanding of the underlying mechanisms of radiation-induced DNA damage and the resulting observable biological effects when radiation parameters and/or environmental conditions change.
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Affiliation(s)
- J Schuemann
- a Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - A L McNamara
- a Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - J W Warmenhoven
- b Division of Cancer Sciences, The University of Manchester, Manchester, United Kingdom
| | - N T Henthorn
- b Division of Cancer Sciences, The University of Manchester, Manchester, United Kingdom
| | - K J Kirkby
- b Division of Cancer Sciences, The University of Manchester, Manchester, United Kingdom
| | - M J Merchant
- b Division of Cancer Sciences, The University of Manchester, Manchester, United Kingdom
| | - S Ingram
- b Division of Cancer Sciences, The University of Manchester, Manchester, United Kingdom
| | - H Paganetti
- a Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - K D Held
- a Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - J Ramos-Mendez
- c Department of Radiation Oncology, University of California San Francisco, San Francisco, California
| | - B Faddegon
- c Department of Radiation Oncology, University of California San Francisco, San Francisco, California
| | - J Perl
- d SLAC National Accelerator Laboratory, Menlo Park, California
| | - D T Goodhead
- e Medical Research Council, Harwell, United Kingdom
| | | | - H Rabus
- g Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany.,h Task Group 6.2 "Computational Micro- and Nanodosimetry", European Radiation Dosimetry Group e.V., Neuherberg, Germany
| | - H Nettelbeck
- g Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany.,h Task Group 6.2 "Computational Micro- and Nanodosimetry", European Radiation Dosimetry Group e.V., Neuherberg, Germany
| | - W Friedland
- h Task Group 6.2 "Computational Micro- and Nanodosimetry", European Radiation Dosimetry Group e.V., Neuherberg, Germany.,i Institute of Radiation Protection, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
| | - P Kundrát
- i Institute of Radiation Protection, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany
| | - A Ottolenghi
- j Physics Department, University of Pavia, Pavia, Italy
| | - G Baiocco
- h Task Group 6.2 "Computational Micro- and Nanodosimetry", European Radiation Dosimetry Group e.V., Neuherberg, Germany.,j Physics Department, University of Pavia, Pavia, Italy
| | - S Barbieri
- h Task Group 6.2 "Computational Micro- and Nanodosimetry", European Radiation Dosimetry Group e.V., Neuherberg, Germany.,j Physics Department, University of Pavia, Pavia, Italy
| | - M Dingfelder
- k Department of Physics, East Carolina University, Greenville, North Carolina
| | - S Incerti
- l CNRS, IN2P3, CENBG, UMR 5797, F-33170 Gradignan, France.,m University of Bordeaux, CENBG, UMR 5797, F-33170 Gradignan, France
| | - C Villagrasa
- h Task Group 6.2 "Computational Micro- and Nanodosimetry", European Radiation Dosimetry Group e.V., Neuherberg, Germany.,n Institut de Radioprotection et Sûreté Nucléaire, F-92262 Fontenay aux Roses Cedex, France
| | - M Bueno
- n Institut de Radioprotection et Sûreté Nucléaire, F-92262 Fontenay aux Roses Cedex, France
| | - M A Bernal
- o Applied Physics Department, Gleb Wataghin Institute of Physics, State University of Campinas, Campinas, SP, Brazil
| | - S Guatelli
- p Centre for Medical Radiation Physics, University of Wollongong, Wollongong, NSW, Australia
| | - D Sakata
- p Centre for Medical Radiation Physics, University of Wollongong, Wollongong, NSW, Australia
| | - J M C Brown
- q Department of Radiation Science and Technology, Delft University of Technology, Delft, The Netherlands
| | - Z Francis
- r Department of Physics, Faculty of Science, Saint Joseph University, Beirut, Lebanon
| | - I Kyriakou
- s Medical Physics Laboratory, University of Ioannina Medical School, Ioannina, Greece
| | - N Lampe
- l CNRS, IN2P3, CENBG, UMR 5797, F-33170 Gradignan, France
| | - F Ballarini
- j Physics Department, University of Pavia, Pavia, Italy.,t Italian National Institute of Nuclear Physics, Section of Pavia, I-27100 Pavia, Italy
| | - M P Carante
- j Physics Department, University of Pavia, Pavia, Italy.,t Italian National Institute of Nuclear Physics, Section of Pavia, I-27100 Pavia, Italy
| | - M Davídková
- u Department of Radiation Dosimetry, Nuclear Physics Institute of the CAS, Řež, Czech Republic
| | - V Štěpán
- u Department of Radiation Dosimetry, Nuclear Physics Institute of the CAS, Řež, Czech Republic
| | - X Jia
- v Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - F A Cucinotta
- w Health Physics and Diagnostic Sciences, University of Nevada Las Vegas, Las Vegas, Nevada
| | - R Schulte
- x Division of Biomedical Engineering Sciences, School of Medicine, Loma Linda University, Loma Linda, California
| | - R D Stewart
- y Department of Radiation Oncology, University of Washington, Seattle, Washington
| | - D J Carlson
- z Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, Connecticut
| | - S Galer
- aa Medical Radiation Science Group, National Physical Laboratory, Teddington, United Kingdom
| | - Z Kuncic
- bb School of Physics, University of Sydney, Sydney, NSW, Australia
| | - S Lacombe
- cc Institut des Sciences Moléculaires d'Orsay (UMR 8214) University Paris-Sud, CNRS, University Paris-Saclay, 91405 Orsay Cedex, France
| | | | - S H Cho
- ee Department of Radiation Physics and Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - G Sawakuchi
- ee Department of Radiation Physics and Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - T Inaniwa
- ff Department of Accelerator and Medical Physics, National Institute of Radiological Sciences, Chiba, Japan
| | - T Sato
- gg Japan Atomic Energy Agency, Nuclear Science and Engineering Center, Tokai 319-1196, Japan
| | - W Li
- i Institute of Radiation Protection, Helmholtz Zentrum München - German Research Center for Environmental Health, Neuherberg, Germany.,hh Task Group 7.7 "Internal Micro- and Nanodosimetry", European Radiation Dosimetry Group e.V., Neuherberg, Germany
| | - A V Solov'yov
- ii MBN Research Center, 60438 Frankfurt am Main, Germany
| | - E Surdutovich
- jj Department of Physics, Oakland University, Rochester, Michigan
| | - M Durante
- kk GSI Helmholtzzentrum für Schwerionenforschung, Biophysics Department, Darmstadt, Germany
| | - K M Prise
- ll Centre for Cancer Research and Cell Biology, Queens University Belfast, Belfast, United Kingdom
| | - S J McMahon
- ll Centre for Cancer Research and Cell Biology, Queens University Belfast, Belfast, United Kingdom
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Muñoz-Montplet C, Marruecos J, Buxó M, Bueno M, Onsès A, Romera-Martínez I, Jurado-Bruggeman D. EP-1830: Switching from AAA to AXB in head and neck treatments using VMAT: is the spinal cord safe? Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)32139-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Bueno M, Duch M, Jurado-Bruggeman D, Agramunt-Chaler S, Muñoz-Montplet C. Experimental verification of Acuros XB in the presence of lung-equivalent heterogeneities. RADIAT MEAS 2017. [DOI: 10.1016/j.radmeas.2017.01.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Navarro J, Deniel J, Yousfi E, Jallais C, Bueno M, Fort A. Influence of lane departure warnings onset and reliability on car drivers' behaviors. Appl Ergon 2017; 59:123-131. [PMID: 27890120 DOI: 10.1016/j.apergo.2016.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 07/28/2016] [Accepted: 08/12/2016] [Indexed: 06/06/2023]
Abstract
Lane departures represent an important cause of road crashes. The objective of the present study was to assess the effects of an auditory Lane Departure Warning System (LDWS) for partial and full lane departures (onset manipulation) combined with missed warnings (reliability manipulation: 100% reliable, 83% reliable and 66% reliable) on drivers' performances and acceptance. Several studies indicate that LDWS improves drivers' performances during lane departure episodes. However, little is known about the effects of the warning onset and reliability of LDWS. Results of studies which looked at forward collision warning systems show that early warnings tend to improve drivers' performances and receive a better trust judgement from the drivers when compared to later warnings. These studies also suggest that reliable assistances are more effective and trusted than unreliable ones. In the present study, lane departures were brought about by means of a distraction task whilst drivers simulated driving in a fixed-base simulator with or without an auditory LDWS. Results revealed steering behaviors improvements with LDWS. More effective recovery maneuvers were found with partial lane departure warnings than with full lane departure warnings and assistance unreliability did not impair significantly drivers' behaviors. Regarding missed lane departure episodes, drivers were found to react later and spend more time out of the driving lane when compared to properly warned lane departures, as if driving without assistance. Subjectively, LDWS did not reduce mental workload and partial lane departure warnings were judged more trustworthy than full lane departure ones. Data suggests the use of partial lane departure warnings when designing LDWS and that even unreliable LDWS may draw benefits compared to no assistance.
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Affiliation(s)
- J Navarro
- Laboratoire d'Etude des Mécanismes Cognitifs (EA 3082), University Lyon 2, France.
| | - J Deniel
- Laboratoire d'Etude des Mécanismes Cognitifs (EA 3082), University Lyon 2, France
| | - E Yousfi
- Laboratoire d'Etude des Mécanismes Cognitifs (EA 3082), University Lyon 2, France
| | - C Jallais
- LESCOT-TS2-IFSTTAR (French Institute of Science and Technology for Transport, Development and Networks), Bron, France
| | - M Bueno
- LESCOT-TS2-IFSTTAR (French Institute of Science and Technology for Transport, Development and Networks), Bron, France
| | - A Fort
- LESCOT-TS2-IFSTTAR (French Institute of Science and Technology for Transport, Development and Networks), Bron, France
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Martín-Campos J, Julve J, Plana N, Figueras R, Esteve E, Mauri M, Bueno M, Caixàs A, Llargués E, Vila À, Morales C, Soler C, Argimón J, Mayos J, Grau J, Zamora A, Matas L, Vila L, Masana L, Blanco-Vaca F. Low-density lipoprotein gene score to identify polygenic forms of familial hypercholesterolemia in a Spanish population. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.342] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Vázquez VF, Luong J, Bueno M, Terán F, Paje SE. Assessment of an action against environmental noise: Acoustic durability of a pavement surface with crumb rubber. Sci Total Environ 2016; 542:223-230. [PMID: 26519582 DOI: 10.1016/j.scitotenv.2015.10.102] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 10/13/2015] [Accepted: 10/20/2015] [Indexed: 06/05/2023]
Abstract
Environmental noise is a worldwide problem that has an adverse effect in the quality of life of urban population. Some work has shown that there is a correlation between environmental noise and health issues as sleep disturbance or annoyance. This study presents the time evolution of a test track fabricated with an asphalt mixture with 20% of crumb rubber by weight of bitumen, added by the wet process. A complete surface characterization has been performed by determining tire/pavement sound levels, road texture profiles, in-situ dynamic stiffness and sound absorption of compacted and extracted sample cores. Two measurement campaigns were performed: just after mixture laying and after 3 years in service. This study confirms that the use of crumb rubber as a modifier of bituminous binders (CRMB) can improve the pavement characteristics: gap-graded mixtures with crumb rubber can be used in the action plans as urban rehabilitation measure to fight noise pollution. However, this noise reduction seems to decrease with age at a rate of approximately 0.15 dB(A) per year.
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Affiliation(s)
- V F Vázquez
- University of Castilla-La Mancha, Laboratory of Acoustics Applied to Civil Engineering, Avda. Camilo José Cela s/n, 13071 Ciudad Real, Spain
| | - J Luong
- University of Liège, Environmental Sciences and Technologies Dept., Passage des Déportés 2, 5030, Gembloux, Belgium
| | - M Bueno
- Empa, Swiss Federal Laboratories for Material Science and Technology, Road Engineering Laboratory, Ueberladstr. 129, CH-8600, Duebendorf, Switzerland
| | - F Terán
- University of Castilla-La Mancha, Laboratory of Acoustics Applied to Civil Engineering, Avda. Camilo José Cela s/n, 13071 Ciudad Real, Spain
| | - S E Paje
- University of Castilla-La Mancha, Laboratory of Acoustics Applied to Civil Engineering, Avda. Camilo José Cela s/n, 13071 Ciudad Real, Spain.
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Bueno M, Schulte R, Meylan S, Villagrasa C. Influence of the geometrical detail in the description of DNA and the scoring method of ionization clustering on nanodosimetric parameters of track structure: a Monte Carlo study using Geant4-DNA. Phys Med Biol 2015; 60:8583-99. [DOI: 10.1088/0031-9155/60/21/8583] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Villagrasa C, Gruel G, Gonon G, Meylan S, Bug M, Giesen U, Bueno M, Baek W, Arndt A, Rabus H. SP-0211: Track structure modelling and biodescriptors of the topology of energy deposition. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)40209-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Plana N, Figueras R, Esteve E, Mauri M, Bueno M, Caixàs A, Llargués E, Vila A, Morales C, Soler C, Argimon J, Mayos J, Grau J, Zamora A, Matas L, Vila L, Blanco-Vaca F. Use of next generation sequencing for the diagnosis of familial hypercholesterolemia. Atherosclerosis 2014. [DOI: 10.1016/j.atherosclerosis.2014.05.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Bueno M, Carrasco P, Jornet N, Muñoz-Montplet C, Duch MA. On the suitability of ultrathin detectors for absorbed dose assessment in the presence of high-density heterogeneities. Med Phys 2014; 41:081710. [DOI: 10.1118/1.4886760] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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17
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Bueno M, Paganetti H, Duch MA, Schuemann J. An algorithm to assess the need for clinical Monte Carlo dose calculation for small proton therapy fields based on quantification of tissue heterogeneity. Med Phys 2014; 40:081704. [PMID: 23927301 DOI: 10.1118/1.4812682] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
PURPOSE In proton therapy, complex density heterogeneities within the beam path constitute a challenge to dose calculation algorithms. This might question the reliability of dose distributions predicted by treatment planning systems based on analytical dose calculation. For cases in which substantial dose errors are expected, resorting to Monte Carlo dose calculations might be essential to ensure a successful treatment outcome and therefore the benefit is worth a presumably long computation time. The aim of this study was to define an indicator for the accuracy of dose delivery based on analytical dose calculations in treatment planning systems for small proton therapy fields to identify those patients for which Monte Carlo dose calculation is warranted. METHODS Fourteen patients treated at our facility with small passively scattered proton beams (apertures diameters below 7 cm) were selected. Plans were generated in the XiO treatment planning system in combination with a pencil beam algorithm developed at the Massachusetts General Hospital and compared to Monte Carlo dose calculations. Differences in the dose to the 50% of the gross tumor volume (D50, GTV) were assessed in a field-by-field basis. A simple and fast methodology was developed to quantify the inhomogeneity of the tissue traversed by a single small proton beam using a heterogeneity index (HI)-a concept presented by Plugfelder et al. [Med. Phys. 34, 1506-1513 (2007)] for scanned proton beams. Finally, the potential correlation between the error made by the pencil beam based treatment planning algorithm for each field and the level of tissue heterogeneity traversed by the proton beam given by the HI was evaluated. RESULTS Discrepancies up to 5.4% were found in D50 for single fields, although dose differences were within clinical tolerance levels (<3%) when combining all of the fields involved in the treatment. The discrepancies found for each field exhibited a strong correlation to their associated HI-values (Spearman's ρ=0.8, p<0.0001); the higher the level of tissue inhomogeneities for a particular field, the larger the error by the analytical algorithm. With the established correlation a threshold for HI can be set by choosing a tolerance level of 2-3%-commonly accepted in radiotherapy. CONCLUSIONS The HI is a good indicator for the accuracy of proton field delivery in terms of GTV prescription dose coverage when small fields are delivered. Each HI-value was obtained from the CT image in less than 3 min on a computer with 2 GHz CPU allowing implementation of this methodology in clinical routine. For HI-values exceeding the threshold, either a change in beam direction (if feasible) or a recalculation of the dose with Monte Carlo would be highly recommended.
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Affiliation(s)
- M Bueno
- Departament de Dosimetria i Física Mèdica, Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya, 08028 Barcelona, Spain.
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Schuemann J, Testa M, Bueno M, Min C, Moteabbed M, Giantsoudi D, Paganetti H. SU-E-T-451: Patient and Site-Specific Assessment of the Value of Routine Monte Carlo Dose Calculation in Proton Therapy. Med Phys 2013. [DOI: 10.1118/1.4814884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Bueno M, Schümann J, Duch M, Paganetti H. OC-0437: An algorithm to assess the need for clinical Monte Carlo dose calculations for proton therapy fields. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)32743-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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20
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Fontagné-Dicharry S, Godin S, Liu H, Prabhu Antony Jesu P, Bouyssiere B, Bueno M, Tacon P, Médale F, Kaushik S. Influence of the forms and levels of dietary selenium on oxidative stress in rainbow trout fry. Commun Agric Appl Biol Sci 2013; 78:125-128. [PMID: 25141645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
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Giménez-Palop O, Coronas R, Cobo J, Gallart L, Barbero JD, Parra I, Fusté G, Vendrell J, Bueno M, González-Clemente JM, Caixàs A. Fasting plasma peptide YY concentrations are increased in patients with major depression who associate weight loss. J Endocrinol Invest 2012; 35:645-8. [PMID: 22183081 DOI: 10.3275/8180] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Many patients with major depression refer a decreased appetite and weight loss among their symptoms. Peptide YY (PYY) and ghrelin belong to the family of peptides of the gut-brain axis implicated in the regulation of appetite and energy metabolism. PYY stimulates a powerful central satiety response and ghrelin increases food intake and weight gain. Brain-derived neurotrophic factor (BDNF) also contributes to the central control of food intake as an anorexigenic factor. AIM To study fasting plasma total and acylated ghrelin, plasma PYY and serum BDNF levels in patients with major depression with weight loss as one of their symptoms and compare them with matched healthy controls. SUBJECTS AND METHODS Fifteen adult patients, 9 male and 6 female, with recent diagnosis of major depression, and 16 healthy adult subjects, matched by age and anthropometric parameters were studied. All depressed patients referred weight loss and were not under antidepressant therapy. Fasting total PYY, total ghrelin and acylated ghrelin and BDNF were determined. RESULTS Fasting total PYY was higher in patients than controls (2.01±0.09 vs 1.29±0.16 pmol/l). There were no differences in fasting total ghrelin, acylated ghrelin or BDNF levels. CONCLUSIONS Major depressed patients, with weight loss at diagnosis, showed higher fasting plasma PYY levels that could contribute to their reduced appetite.
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Affiliation(s)
- O Giménez-Palop
- Diabetes, Endocrinology and Nutrition Department, Sabadell Hospital, Sabadell (Barcelona), Spain.
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Bueno M, Schuemann J, Duch M, Paganetti H. MO-F-BRB-03: A Method to Assess the Need for Clinical Monte Carlo Dose Calculations for Small Proton Therapy Fields. Med Phys 2012; 39:3874. [PMID: 28518244 DOI: 10.1118/1.4735816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE Due to multiple Coulomb scattering in complex geometries, small field dosimetry in proton therapy is challenging. Our goal was to define an indicator for the accuracy of dose delivery based on analytical dose calculations in treatment planning systems for small (e.g. radiosurgery) proton therapy fields. METHODS Seven patients whose treatment involved one or more small fields (below ∼3.6cm in diameter) were selected. We developed a fast methodology to quantify the inhomogeneity of the tissue traversed by a single beam using a heterogeneity index (HI). The implementation was based on the dose calculation approach taken by our pencil beam algorithm. Plans created with the treatment planning system were verified against Monte Carlo dose calculations on a field- by-field basis. DVHs were analyzed and differences in the dose to the GTV were assessed. The correlation between the HI-values and the discrepancies between planning system and Monte Carlo in terms of absolute dose to the target was studied. RESULTS Our treatment planning system overestimates the dose within the GTV for very small fields by up to ∼8%, even if proper output factor normalization is done in water. The differences are strongly correlated to HI (Spearman's ρ=0.8, rho<0.0001). More complex heterogeneities within the beam path caused larger errors by the analytical algorithm. With the established correlation a threshold for the HI can be set by choosing a tolerance level. CONCLUSIONS The HI as defined in this study appears to be a good indicator of the accuracy of proton field delivery in terms of GTV prescription dose when small fields are being delivered. Each HI-value was obtained in less than 2 minutes allowing implementation of the HI algorithm in clinical routine. For HI- values exceeding a certain threshold, either a change in beam incidence or a Monte Carlo dose calculation should be considered.
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Affiliation(s)
- M Bueno
- Universitat Politecnica de Catalunya, Barcelona, SPAIN.,Massachusetts General Hospital, Boston, MA
| | - J Schuemann
- Universitat Politecnica de Catalunya, Barcelona, SPAIN.,Massachusetts General Hospital, Boston, MA
| | - M Duch
- Universitat Politecnica de Catalunya, Barcelona, SPAIN.,Massachusetts General Hospital, Boston, MA
| | - H Paganetti
- Universitat Politecnica de Catalunya, Barcelona, SPAIN.,Massachusetts General Hospital, Boston, MA
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Lopez-Vilanova N, Bueno M, Sevillano D, Minguez C, Ginjaume M, Sanchez-Reyes A, Duch M. SU-E-T-290: Dosimetric Verification of Helical Tomotherapy against Experimental Measurements for Head and Neck Treatments. Med Phys 2012; 39:3770. [DOI: 10.1118/1.4735358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Montplet CM, Chaler SA, Bruggeman DJ, Bueno M, Duch M. EP-1343 DOSIMETRIC VALIDATION OF ACUROS XB IN WATER. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71676-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Bueno M, Duch M, Bruggeman DJ, Chaler SA, Montplet CM. PD-0040 DOSIMETRIC VERIFICATION OF ACUROS XB IN HETEROGENEITIES AGAINST EXPERIMENTAL MEASUREMENTS AND MONTE CARLO METHODS. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)70379-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Fernández M, Carvalho R, Fontes S, Pieper C, Bueno M, Demarco F. Sodium percarbonate as a bleaching agent for discolored pulpless teeth. Dent Mater 2011. [DOI: 10.1016/j.dental.2011.08.478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Fernández MR, Carvalho RV, Ogliari FA, Beira FA, Etges A, Bueno M. Cytotoxicity and genotoxicity of sodium percarbonate: a comparison with bleaching agents commonly used in discoloured pulpless teeth. Int Endod J 2010; 43:102-8. [DOI: 10.1111/j.1365-2591.2009.01648.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dardanelli MS, Carletti SM, Paulucci NS, Medeot DB, Cáceres EAR, Vita FA, Bueno M, Fumero MV, Garcia MB. Benefits of Plant Growth-Promoting Rhizobacteria and Rhizobia in Agriculture. Plant Growth and Health Promoting Bacteria 2010. [DOI: 10.1007/978-3-642-13612-2_1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Artero EG, España-Romero V, Ortega FB, Jiménez-Pavón D, Ruiz JR, Vicente-Rodríguez G, Bueno M, Marcos A, Gómez-Martínez S, Urzanqui A, González-Gross M, Moreno LA, Gutiérrez A, Castillo MJ. Health-related fitness in adolescents: underweight, and not only overweight, as an influencing factor. The AVENA study. Scand J Med Sci Sports 2009; 20:418-27. [DOI: 10.1111/j.1600-0838.2009.00959.x] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pieper CM, Zanchi CH, Rodrigues-Junior SA, Moraes RR, Pontes LS, Bueno M. Sealing ability, water sorption, solubility and toothbrushing abrasion resistance of temporary filling materials. Int Endod J 2009; 42:893-9. [PMID: 19549149 DOI: 10.1111/j.1365-2591.2009.01590.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AIM To evaluate marginal seal, water sorption, solubility and loss of mass after brushing of several temporary filling materials. METHODOLOGY For marginal seal, Class I cavities, including endodontic access preparations, were made in human molar teeth and restored using one or other of several temporary filling materials (n = 10): zinc oxide/calcium sulphate-based cement (Cavit, 3M,ESPE, St. Paul, MN, USA), zinc oxide/eugenol cement (IRM, Dentsply Caulk, Milford, DE, USA), glass ionomer cement (Vidrion R, SSWhite, Rio de Janeiro, RJ, Brazil) or a dimethacrylate-based filling (Bioplic, Biodinâmica, Londrina, PR, Brazil). Dye penetration was assessed after thermocycling and immersion in 0.5% basic fuchsine solution. For water sorption, solubility and loss of mass analyses, disc-shaped specimens were made. Water sorption and solubility were evaluated by mass alteration after storage in distilled water for 7 days (n = 7). Loss of mass was calculated based on the difference of mass after abrasion with a toothbrush (n = 5), and surfaces were analysed by SEM. Data of water sorption, solubility and loss of mass were submitted to anova and Tukey's test, and marginal sealing data to Kruskal-Wallis test (P < 0.05). RESULTS Statistically significant differences were observed for marginal sealing (P < 0.0001), water sorption (P < 0.01), solubility (P < 0.01) and loss of mass (P < 0.05). Bioplic had the best marginal seal. Cavit had the greatest water sorption and solubility. Vidrion R and Bioplic had the lowest solubility. Loss of mass after brushing was higher for Cavit, followed by Bioplic, IRM and Vidrion R. Cavit and Vidrion R were worn aggressively by brushing. CONCLUSIONS The resin-based temporary filling Bioplic produced the best marginal seal, and was associated with the lowest water sorption, solubility and loss of mass.
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Affiliation(s)
- C M Pieper
- Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil
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Paje SE, Bueno M, Viñuela U, Terán F. Toward the acoustical characterization of asphalt pavements: analysis of the tire/road sound from a porous surface. J Acoust Soc Am 2009; 125:5-7. [PMID: 19173385 DOI: 10.1121/1.3025911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Sound level in close proximity to the contact patch of the tire and road (L(CPtr)) is analyzed as a function of the vehicle speed in the acoustic frequency range, showing different behavior depending on frequency. At least two regions are observed; one at low frequencies, where the variation in sound with speed (coefficient B) increases with frequency, and the other at higher frequencies, where such sound/speed variation does not increase significantly with frequency. The dependence of B at low frequencies seems to be correlated with the high sound absorption of this porous surface.
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Affiliation(s)
- S E Paje
- Department of Applied Physics, Laboratory of Acoustics Applied to Civil Engineering, ETSI Caminos and ES Informatica, Universidad de Castilla-La Mancha, Ciudad Real, Spain.
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Luo C, Bueno M, Kant J, Randhawa P. Biologic diversity of polyomavirus BK genomic sequences: Implications for molecular diagnostic laboratories. J Med Virol 2008; 80:1850-7. [PMID: 18712842 DOI: 10.1002/jmv.21281] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Data on polyomavirus genomic diversity has greatly expanded in the past few years. The implications of viral DNA sequence variation on the performance of molecular diagnostic assays have not been systematically examined. 716 BK, 1626 JC, and 73 SV40 virus sequences available in GenBank were aligned using Clustal-X. Five different published BKV PCR assays currently in use at major medical centers were evaluated for primer and probe mismatches with available GenBank sequences. Coverage of naturally occurring BKV strains varied amongst different assay methods. Targeted viral sequences showed major mismatch with primer or probe sequence in up to 30.7% of known BKV strains. BKV subtypes IVa, IVb, and IVc were more prone to this problem, reflecting common use of Type I Dun sequence for assay design. Despite the known polymorphism of this gene, 484 VP-1 sequences with conserved areas potentially suitable for PCR assay design are available. Assay targets in the Large T-antigen and agnogene are less subject to genetic variation, but sequence information corresponding to the latter two genes is available only for 164 and 174 published strains, respectively. Cross reactivity of appropriately selected BKV primers with JCV and SV40 sequences available in current databases was not a significant problem.
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Affiliation(s)
- C Luo
- Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
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Bueno G, Moreno LA, Bueno O, Morales J, Pérez-Roche T, Garagorri JM, Bueno M. Metabolic risk-factor clustering estimation in obese children. J Physiol Biochem 2008; 63:347-55. [PMID: 18457010 DOI: 10.1007/bf03165766] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The purpose of this study was to apply the new approach for Metabolic Individual Risk-factor And Clustering Estimation (MIRACLE) score in a group of Spanish obese children and adolescents and to describe its relationship with other metabolic risk factors. 153 children with simple obesity were studied: 79 males and 74 females, mean age 11.2 +/- 2.2. Obesity was defined when BMI was higher than the age and sex specific equivalent to 30 kg/m2 in adults. MIRACLE score included: family history (early cardiovascular disease, type 2 diabetes, and hypertension), individual history (small for gestational age and ethnic origin), clinical features (BMI, waist circumference > 90th percentile and blood pressure > 95th percentile) and metabolic abnormalities (glucose intolerance or type 2 diabetes). It was assigned a value of 1 to "presence" and 0 to" absence" in every patient. The children were considered as having metabolic risk when at least 5 items were present. Triglycerides, HDL-cholesterol, apolipoprotein B, apolipoprotein A1, glucose and HOMA index, were measured too. The most frequent clinical features of MIRACLE score were: excess waist circumference (95.4%) and hypertension (41.8%). Family history criteria were frequent (55.3% for type 2 diabetes, 39.1% for hypertension and 31.3% for early cardiovascular disease). Individual risk factors were not frequent. Glucose intolerance was detected in 22.2% of the obese patients. A MIRACLE score > or = 5 was found in 37.4% of the children studied, being associated with a significant risk of dyslipidemia (triglycerides, p = 0.040; HDL-cholesterol, p = 0.006; LDL-cholesterol p = 0.038; apolipoprotein B, p = 0.008) only in females. In conclusion, the MIRACLE score is useful in order to detect metabolic risk in obese children but it seems necessary to improve the score, by including other features of the metabolic syndrome like lipid profile or indirect indicators of insulin resistance.
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Affiliation(s)
- G Bueno
- Departamento de Pediatría, Universidad de Zaragoza, C/ Domingo Miral s/n, 50009 Zaragoza, Spain
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Bueno O, Bueno G, Moreno LA, Nuviala RJ, Pérez-González JM, Bueno M. Zinc supplementation in infants with asymmetric intra uterine growth retardation; effect on growth, nutritional status and leptin secretion. NUTR HOSP 2008; 23:212-219. [PMID: 18560697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2007] [Accepted: 09/05/2007] [Indexed: 05/26/2023] Open
Abstract
OBJECTIVES To analyse the effect of zinc supplementation in growth and nutritional status of a homogeneous group of newborns with intra uterine growth retardation and asymmetric growth. The effect of changes of zinc status on growth and leptin serum concentrations was also analysed. POPULATION AND METHODS A double blind, randomised clinical trial was designed in order to detect differences in growth between zinc and placebo groups during the first 6 months of life. 31 infants were included either to the zinc group (n = 14) (38.8+/-1.4 weeks GA, 2,171+/-253 g body weight) or the placebo group (n = 17) (38.9+/-1.1 weeks GA, 2,249+/-220 g body weight). The zinc group received a supplement of 3 mg elemental zinc per day (as zinc sulphate). RESULTS There were not significant differences between groups for anthropometric measurements through the study period. We found a significant effect of the study group, in hair zinc concentrations, but not in serum zinc concentrations; post-hoc comparisons for hair zinc revealed that there were significant differences between groups at 1, 2, and 6 months of age. Changes in serum and hair zinc concentrations from baseline to 6 months, showed significant correlations with changes in weight/age and length/age z-scores, in the supplement group. Changes in leptin serum concentrations during follow-up, showed significant correlations with changes in sum of 4 skinfolds and weight/age z-score, in the placebo group. Changes in hair zinc concentration through the study period showed significant correlations with changes in leptin serum concentrations from baseline to 6 months of follow-up. CONCLUSIONS In a homogeneous group of intra uterine growth retardation infants with asymmetric growth, 3 mg/day zinc supplementation do not show significant improvements in weight and length growth. Changes in zinc status were related with changes in weight and length during the first 6 months of life. Changes in leptin serum concentrations were related with changes in the anthropometric indices of body fat accretion.
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Affiliation(s)
- O Bueno
- Departamento de Pediatría, Hospital Clínico Universitario Lozano Blesa, Zaragoza, España
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Abstract
Geo-referenced close proximity rolling noise and sound absorption measurements are used for acoustical characterization of asphalt concrete surfaces in an urban environment. A close proximity noise map of streets with low speed limits is presented for a reference speed of 50 km/h. Different pavements and pavement conditions, common in urban streets, are analyzed: dense and semidense asphalt concrete, with Spanish denomination D-8 and S-12, respectively, and on the other hand, dense pavement at the end of its service life (D-8(*)). From the acoustics point of view, the most favorable surface, by more than 4 dB(A) compared with the S-12 mix, is the smoothest surface, i.e., the D-8 mix, even though it presents a minor absorption coefficient in normal incidence. Noise levels from dense surfaces (D-8) increase significantly over time, principally due to the appearance of surface defects such as cracks and ruts. Longitudinal variability of the close proximity tire/pavement noise emission and surface homogeneity are also analyzed.
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Affiliation(s)
- S E Paje
- Laboratory of Acoustics Applied to Civil Engineering (LA2IC), Department of Applied Physics-ETSI Caminos and ES Informática, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain.
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Paje SE, Bueno M, Terán F, Viñuela U. Monitoring road surfaces by close proximity noise of the tire/road interaction. J Acoust Soc Am 2007; 122:2636-2641. [PMID: 18189555 DOI: 10.1121/1.2766777] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Applied acoustics is becoming an important field for civil infrastructure and environmental assessment, and road maintenance or rehabilitation strategies. In this research LA(2)IC has developed a GPS-based measurement techniques and apparatus on a test vehicle, for monitoring the acoustical properties of different road pavement surfaces with a reference tire. A field test on PA-12 Spanish porous pavement found in Ciudad Real is developed. The test procedure, a modification based upon the close-proximity method (CPX), relies on the use of three standard microphones situated very close to the tire/road contact patch. This procedure allows the simultaneous measurement of the sound emission synchronized to a GPS receiver, which permits tracking of the position of the sound emission. Geo-referenced sound spectra for every 10 m during individual passes of the test vehicle are analyzed to determine the tire/road noise emissions from tire/PA-12 pavement interaction. Noise levels of around 102 dB(A), with a variability of approximately 0.6 dB(A), are found at a reference vehicle speed of 85 kmh. The frequency spectrum analysis over the test section shows noticeable differences for frequencies above 1 kHz, where the tire/road noise generation mechanisms are dominated by air pumping.
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Affiliation(s)
- S E Paje
- Laboratory of Acoustics Applied to Civil Engineering (LA2IC), Department of Applied Physics, E.T.S.I. Caminos and E.S. Informática, Universidad de Castilla-La Mancha (UCLM), 13071 Ciudad Real, Spain.
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Moreno LA, Mesana MI, González-Gross M, Gil CM, Ortega FB, Fleta J, Wärnberg J, León J, Marcos A, Bueno M. Body fat distribution reference standards in Spanish adolescents: the AVENA Study. Int J Obes (Lond) 2007; 31:1798-805. [PMID: 17607324 DOI: 10.1038/sj.ijo.0803670] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
OBJECTIVE To present body fat patterning reference standards to identify children with a predominant distribution of body fat in the abdominal or truncal region of the body. DESIGN Cross-sectional study in a representative sample of Spanish adolescents aged 13-18 years. SUBJECTS A total of 2160 adolescents with a complete set of anthropometric measurements (1109 males and 1051 females). MEASUREMENTS Weight, height, body mass index, skinfold thickness (biceps, triceps, subscapular, suprailiac, thigh, calf) and waist and hip circumferences. RESULTS In the majority of the age groups, subscapular/triceps skinfolds ratio, trunk-to-total skinfolds percent (TTS%)and waist circumference values were significantly higher in males than in females; hip circumference was higher in females than in males, except at 15.5 years. In males, age showed a significant effect for all the body fat distribution indices; however, in females, the effect was only significant for triceps skinfold, waist and hip circumferences and waist-to-hip ratio. Smoothed age- and sex-specific triceps skinfold, subscapular skinfold, subscapular/triceps skinfolds ratio, TTS%, waist circumference and hip circumference, waist-to-hip and waist-to-height ratio percentile values for male and female adolescents have been established. CONCLUSION These reference data for waist circumference and the other fat patterning indices, together with data from other countries, will help to establish international central obesity criteria for adolescents. The presented percentile values will give the possibility to estimate the proportion of adolescents with high or low regional adiposity amounts.
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Affiliation(s)
- L A Moreno
- EU Ciencias de la Salud, Universidad de Zaragoza, Zaragoza, Spain.
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Bueno G, Bueno O, Moreno LA, García R, Tresaco B, Garagorri JM, Bueno M. Diversity of metabolic syndrome risk factors in obese children and adolescents. J Physiol Biochem 2006; 62:125-33. [PMID: 17217166 DOI: 10.1007/bf03174073] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The aim of this study was to investigate the frequency of metabolic syndrome (MS) variables in a group of spanish obese children and adolescents, to asses MS prevalence in this population and to describe it's relationship with other metabolic risk factors. 103 children were studied : 54 male and 49 female, mean age 10.08+/-2.3 with exogenous obesity. Obesity was defined when BMI was higher than the age and sex specific equivalent to 30 kg/m(2) in adults. MS variables considered were waist circumference, blood pressure, fasting blood triglycerides, fasting glucose/insulin and HDL-cholesterol. The children were considered as having the MS when three or more characteristics showed abnormal values according to Cook and De Ferranti definitions. HOMA index, ApoB and ApoA1 were studied too. The most frequent features of the metabolic syndrome were excess waist circumference and hypertension. The MS markers with the lowest frequency were dyslipidemia and fasting hyperglicemia. MS prevalence was 29,9% (Cook et al. criteria) and 50% (De Ferranti et al. criteria). Fasting insulin and HOMA index values increased significantly (p < 0.05) when three or more abnormalities of the MS variables were present. Apo B increased significantly only in females (p < 0.05) and Apo Al decreased significantly (p < 0.05) in both sexes when MS was present. Adequate metabolic syndrome risk factors criteria, mainly cut-off values, need to be defined in the European paediatric population.
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Affiliation(s)
- G Bueno
- Departamento de Pediatría, Universidad de Zaragoza, C/ Domingo Miral s/n, 50009 Zaragoza, Spain
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López-Llano J, Campos LA, Bueno M, Sancho J. Equilibrium Φ-Analysis of a Molten Globule: The 1-149 Apoflavodoxin Fragment. J Mol Biol 2006; 356:354-66. [PMID: 16364364 DOI: 10.1016/j.jmb.2005.10.086] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2005] [Revised: 10/27/2005] [Accepted: 10/28/2005] [Indexed: 11/19/2022]
Abstract
The apoflavodoxin fragment comprising residues 1-149 that can be obtained by chemical cleavage of the C-terminal alpha-helix of the full-length protein is known to populate a molten globule conformation that displays a cooperative behaviour and experiences two-state urea and thermal denaturation. Here, we have used a recombinant form of this fragment to investigate molten globule energetics and to derive structural information by equilibrium Phi-analysis. We have characterized 15 mutant fragments designed to probe the persistence of native interactions in the molten globule and compared their conformational stability to that of the equivalent full-length apoflavodoxin mutants. According to our data, most of the mutations analysed modify the stability of the molten globule fragment following the trend observed when the same mutations are implemented in the full-length protein. However, the changes in stability observed in the molten globule are much smaller and the Phi-values calculated are (with a single exception) below 0.4. This is consistent with an overall and significant debilitation of the native structure. Nevertheless, the fact that the molten globule fragment can be stabilised using as a guide the native structure of the full-length protein (by increasing helix propensity, optimising charge interactions and filling small cavities) suggests that the overall structure of the molten globule is still quite close to native, in spite of the lowered stability observed.
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Affiliation(s)
- J López-Llano
- Dep. Bioquímica y Biología Molecular y Celular, Facultad de Ciencias and Biocomputation and Complex Systems Physics Institute-BIFI, University of Zaragoza, Spain
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Tresaco B, Bueno G, Pineda I, Moreno LA, Garagorri JM, Bueno M. Homeostatic model assessment (HOMA) index cut-off values to identify the metabolic syndrome in children. J Physiol Biochem 2005; 61:381-8. [PMID: 16180336 DOI: 10.1007/bf03167055] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The aim of the study was to establish the best cut-off value for the homeostatic model assessment (HOMA) index in identifying children and adolescents with the metabolic syndrome. The study included 72 non-obese and 68 obese children aged 7 to 16 years. Obesity is defined using the criteria proposed by Cole et al., being included as metabolic syndrome variables waist circumference, systolic blood pressure, diastolic blood pressure and seric values of glucose, uric acid, fasting insulin, leptin, triglycerides and HDL-cholesterol. Children were considered as having the metabolic syndrome when four or more characteristics showed abnormal values. The HOMA index was calculated as the product of the fasting plasma insulin level (microU/mL) and the fasting plasma glucose level (mmol/L), divided by 22.5. HOMA index cut-offs from the 5th to the 95th percentile were used. A receiver operating characteristic (ROC) curve was generated using the different HOMA cut-offs for the screening of the metabolic syndrome. The areas under the ROC curve, 95% confidence intervals, and the point to the ROC curve closest to 1, were calculated. The area under the ROC curve was 0.863 (95% C.I.: 0.797, 0.930). The point closest to 1 corresponds to the 60th percentile of the HOMA index distribution in our sample. HOMA index value at the 60th percentile was 2.28. Cut-off values corresponding to a range of HOMA index from the 50 to the 75 percentile, showed similar distances to 1. HOMA index values for percentiles 50 to 75 ranged from 2.07 to 2.83. In conclusion, HOMA index could be a useful tool to detect children and adolescents with the metabolic syndrome. HOMA cut-off values need to be defined in the paediatric population; however, values near to 3 seem to be adequate.
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Affiliation(s)
- B Tresaco
- Departamento de Pediatría, Universidad de Zaragoza, C/Domingo Miral s/n, 50009 Zaragoza, Spain
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Moraes RR, Marimon JLM, Schneider LFJ, Correr Sobrinho L, Camacho GB, Bueno M. Carbamide peroxide bleaching agents: effects on surface roughness of enamel, composite and porcelain. Clin Oral Investig 2005; 10:23-8. [PMID: 16292674 DOI: 10.1007/s00784-005-0016-1] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Accepted: 09/28/2005] [Indexed: 11/28/2022]
Abstract
This study examined the effect of 10 and 35% carbamide peroxide bleaching agents on the surface roughness of enamel, feldspathic porcelain, and microfilled and microhybrid composite resins. Standardized cylindrical specimens were prepared for restorative materials. Enamel samples were obtained from buccal and lingual surfaces of human molars. Samples from each substrate were divided in three subgroups (n=10), according to surface treatment: distilled water (control), and 10 and 35% carbamide peroxide. The 10% agent was applied 3 h daily and the 35% agent was applied for 30 min/week, at 37 degrees C, during 21 days. Control samples remained stored in distilled water, at 37 degrees C. Roughness measurements (Ra, microm) were made at 24 h and repeated after 7, 14 and 21 days of exposure. Data were analyzed using ANOVA (split-plot design) and Tukey's test (5% significance level). Samples from control groups showed no significant alteration during all test periods, while for exposure to 10% agent, only the porcelain presented a rougher surface after 21 days (p<0.05). For the 35% product, roughness means significantly increased during the first and second weeks for enamel (p<0.05), and after 21 days for porcelain (p<0.05) and for the microhybrid composite (p<0.05). Microfilled samples showed no significant alteration throughout the 21-day period, regardless of the surface treatment.
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Affiliation(s)
- R R Moraes
- Department of Restorative Dentistry, Dental Materials Area, Piracicaba School of Dentistry, State University of Campinas, 901, Limeira Av., 13414-903 Areião, Piracicaba SP, Brazil
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Moreno LA, Mesana MI, González-Gross M, Gil CM, Fleta J, Wärnberg J, Ruiz JR, Sarría A, Marcos A, Bueno M. Anthropometric body fat composition reference values in Spanish adolescents. The AVENA Study. Eur J Clin Nutr 2005; 60:191-6. [PMID: 16234838 DOI: 10.1038/sj.ejcn.1602285] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE To determine reference values for body mass index (BMI), sum of six skinfolds (sigma6 skinfolds) and body fat percentage (BF%) in Spanish adolescents aged 13-18 years, included in the AVENA Study (Alimentación y Valoración del Estado Nutricional en Adolescentes: Food and Assessment of the Nutritional Status of Adolescents). DESIGN Multicentre cross-sectional study. SETTING Representative sample of Spanish adolescents. SUBJECTS The population was selected by means of a multiplestep, simple random sampling. The final number of subjects included in the AVENA Study was 2859 adolescents; 2160 adolescents had a complete set of anthropometric measurements and were then included in this study (1109 males and 1051 females). INTERVENTIONS Weight, height and six skinfold thicknesses were measured. As indices of total adiposity, we calculated BMI, summation sigma6 skinfolds and BF% with the formulas described by Slaughter et al. RESULTS Sigma6 skinfolds and BF% in each age group were significantly higher in females than in males. In males, age showed a significant effect for BMI, sigma6 skinfolds and BF%; however, in females, the effect was only significant for BF%. The percentile distribution was more disperse towards higher sigma6 skinfolds and BF% values in males when compared with females. CONCLUSIONS The presented percentile values will help us to classify adolescents in comparison with a well-established reference population, and to estimate the proportion of adolescents with high or low adiposity amounts. SPONSORSHIP The AVENA-Study was supported by the Spanish Ministry of Health (FIS 00/0015), and grants from Panrico SA, Madaus SA and Procter and Gamble SA. This study was also supported by Instituto de Salud Carlos III (Spain), RCESP (C03/09) and Spanish Ministry of Education (AP2003-2128).
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Affiliation(s)
- L A Moreno
- EU Ciencias de la Salud, Universidad de Zaragoza, Spain.
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Abstract
Two studies, in 1995 and 2000-02, were compared to assess changes in waist circumference in adolescents. Between the two time periods, waist circumference increased significantly in males at 13 years and in females at 14 years. Significant changes in waist circumference were observed during the study period; the rates of change were 0.53 and 0.86 cm/y in boys and 0.67 and 0.87 cm/y in girls. Future morbidity in adolescents may be affected due to accumulation of excess central fat.
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Affiliation(s)
- L A Moreno
- E.U. Ciencias de la Salud, Universidad de Zaragoza, Zaragoza, Spain.
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Rodríguez G, Moreno LA, Blay MG, Blay VA, Fleta J, Sarría A, Bueno M. Body fat measurement in adolescents: comparison of skinfold thickness equations with dual-energy X-ray absorptiometry. Eur J Clin Nutr 2005; 59:1158-66. [PMID: 16047030 DOI: 10.1038/sj.ejcn.1602226] [Citation(s) in RCA: 126] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVE To compare the most commonly used equations to predict body fatness from skinfold thickness, in male and female adolescents, with dual-energy X-ray absorptiometry (DXA) as a reference method of fatness measurement. DESIGN Cross-sectional nutrition survey. SETTING General adolescent population from Zaragoza (Spain). SUBJECTS AND METHODS A total of 238 Caucasian adolescents (167 females and 113 males), aged 13.0-17.9 y, were recruited from 15 school groups in 11 public and private schools. The percentage fat mass (%FM) was calculated by using skinfold-thickness equations. Predicted %FM was compared with the reference %FM values, measured by DXA. The lack of agreement between methods was assessed by calculating the bias and its 95% limits of agreement. RESULTS Most equations did not demonstrate good agreement compared with DXA. However, in male adolescents, Slaughter et al equations showed relative biases that were not dependent on body fatness and the limits of agreement were narrower than those obtained from the rest of equations. In females, Brook's equation showed nonsignificant differences against DXA and the narrowest 95% limits of agreement. Only biases from Brook and Slaughter et al equations were not dependent on body fatness in female adolescents. CONCLUSIONS Accuracy of most of the skinfold-thickness equations for assessment of %FM in adolescents was poor at the individual level. Nevertheless, to predict %FM when a relative index of fatness is required in field or clinical studies, Slaughter et al equations may be used in adolescents from both sexes and the Brook equation in female adolescents.
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Affiliation(s)
- G Rodríguez
- Department of Pediatrics, University of Zaragoza, Zaragoza, Spain.
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Moreno LA, Tomás C, González-Gross M, Bueno G, Pérez-González JM, Bueno M. Micro-environmental and socio-demographic determinants of childhood obesity. Int J Obes (Lond) 2005; 28 Suppl 3:S16-20. [PMID: 15543213 DOI: 10.1038/sj.ijo.0802798] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
AIM To review the available data in Spain about the socio-demographic and home environmental determinants in children and adolescents. METHOD Review of the main studies conducted in Spain that have analysed the relationship between overweight and socio-economic and environmental determinants in children and adolescents. RESULTS In children aged 6-7 y from Aragon (Spain), the socio-demographic determinants of childhood overweight were size of municipality, year of examination, gender, and province; in adolescents aged 13-14 y, the socio-demographic determinants were year of examination, type of school, size of municipality, gender, and province; overweight showed a significant positive main effect with public schools and low municipality size. In a nationally representative sample of Spanish adolescents from 13 to 18.5 y (AVENA Study), there was a significant relationship between overweight and socio-economic status in males but not in females; in males, the lowest overweight prevalences were observed in both extreme socio-economic groups; moreover, overweight prevalences increased when socio-economic status decreased, from the high to the medium-low socio-economic group. The studied variables related with family environment did not show any significant effect in overweight prevalence. CONCLUSION Better knowledge of the relationship between social class and childhood obesity would lead to clearer hypotheses for the relationship in adults and might improve the preventive measures by identifying children at risk.
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Affiliation(s)
- L A Moreno
- Escuela Universitaria de Ciencias de la Salud, Universidad de Zaragoza, Zaragoza, Spain.
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Abstract
INTRODUCTION Adolescence is a decisive period in human life in which important body composition changes occur. Increase of total body mass and its relative distribution are mainly related to gender and pubertal development. OBJECTIVE This review explores the specific measurements that may be used in this age group to assess excess body fat and to define obesity and overweight. RESULTS Identification of subjects at risk for adiposity requires simple anthropometric cutoffs for the screening of overweight and obesity. In this context, BMI criterion is the most frequently used but, in spite of its high sensitivity and specificity, an important number of adolescents classified as overweight or obese do not have really high adiposity (32.1% of females and 42% of males). Excess total body fat and intra-abdominal visceral fat are related to metabolic abnormalities that increase the risk of cardiovascular diseases. Waist circumference seems to be the best simple anthropometric predictor for the screening of the metabolic syndrome in children and adolescents. CONCLUSIONS Early identification of adolescents at risk for adiposity and its related metabolic complications requires reliable, simple and specific measures of excess body fat for this age group.
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Affiliation(s)
- G Rodríguez
- Department of Pediatrics, University of Zaragoza, Zaragoza, Spain.
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Tresaco B, Bueno G, Moreno LA, Garagorri JM, Bueno M. Insulin resistance and impaired glucose tolerance in obese children and adolescents. J Physiol Biochem 2004; 59:217-23. [PMID: 15000453 DOI: 10.1007/bf03179918] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
In developed countries, obesity prevalence has strongly increased in the last decades. This has also been observed in children and adolescents. Until recently, type 2 diabetes mellitus was considered very rare among children and adolescents; however, in the last decades, some cases have been observed mainly in obese adolescents of some minority populations. The aim of our study was to assess the prevalence of type 2 diabetes, impaired glucose tolerance (IGT) and insulin resistance, and the metabolic features, in obese children and adolescents. We have studied 95 obese children and adolescents, 53 males and 42 females, aged 4-16 years. The prevalence of IGT in obese children and adolescents studied was 7.4%; there was not any child with type 2 diabetes. Fasting glucose and insulin serum concentrations did not show significant differences between obese children with or without IGT; however, 120 minutes after an oral glucose tolerance test, glucose and insulin serum concentrations showed statistically significant differences between both groups. Insulin resistance is defined as a HOMA index higher than 4. The prevalence of insulin resistance in obese children studied was 35.8%. Trygliceride serum concentrations were higher and HDL-C serum concentrations were lower in obese children with IGT than in those without IGT, but the differences were not statistically significant. IGT and insulin resistance are frequent in obese children and adolescents; early treatment in obese children and adolescents with IGT constitutes a strategy of reversing progression to beta-cell failure and in preventing type 2 diabetes.
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Affiliation(s)
- B Tresaco
- Departamento de Pediatría, Universidad de Zaragoza, C/ Domingo Miral S/N, 50009 Zaragoza, Spain
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Moreno LA, Tresaco B, Bueno G, Fleta J, Rodríguez G, Garagorri JM, Bueno M. Psyllium fibre and the metabolic control of obese children and adolescents. J Physiol Biochem 2003; 59:235-42. [PMID: 15000455 DOI: 10.1007/bf03179920] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
In children and adolescents from developed countries, obesity prevalence has strongly increased in the last decades and insulin resistance and impaired glucose tolerance are frequently observed. Some dietary components such as low glycemic index foods and dietary fibre could be used in order to improve glucose homeostasis in these children. Psyllium or ispaghula husk (the husk of the seeds of Plantago ovata) is a mixture of neutral and acid polysaccharides containing galacturonic acid with a ratio of soluble/insoluble fibre of 70/30. Some foods could potentially be enriched with psyllium, like breads, breakfast cereals, pasta and snack foods. The aim of this review was to assess the usefulness of psyllium in the management of obese children and adolescents with abnormalities of carbohydrate and lipid metabolism. After psyllium supplementation, the percentage change in postprandial glucose in type 2 diabetes patients, ranged from -12.2 to -20.2%. In hypercholesterolemic children, the effect of psyllium in LDL-cholesterol serum concentrations ranged from 2.78 to -22.8%; the effect in HDL-cholesterol from -4.16 to 3.05%; and the effect on triglycerides from 8.49 to -19.54%. The reviewed evidence seems to show that psyllium improves glucose homeostasis and the lipid and lipoprotein profile; however, more well controlled trials and further studies are needed to clarify it's effects and the mechanisms involved.
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Affiliation(s)
- L A Moreno
- Departamento de Pediatría, Universidad de Zaragoza, C/ Domingo Miral S/N, 50009 Zaragoza, Spain.
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Abstract
AIM To identify the best anthropometric predictor of the metabolic syndrome in children. METHODS Screening performance was evaluated in a clinical setting. The study included 140 children: 72 non-obese and 68 with non-syndromal obesity. Body mass index (BMI), waist circumference and triceps/subscapular skinfolds ratio were used as predictor variables, and systolic blood pressure, diastolic blood pressure, glucose, uric acid, fasting insulin, triglycerides and HDL-C as metabolic syndrome variables. RESULTS The areas under the receiver operating characteristic (ROC) curves were 0.849 (95% CI: 0.780, 0.919) for BMI, 0.868 (95% CI: 0.801,0.934) for waist circumference and 0.834 (95% CI: 0.757,0.910) for the triceps/subscapular skinfolds ratio. No statistically significant differences were found for the three areas under the ROC curves. The point on the ROC curve closest to 1 corresponded to the 65th percentile for BMI, to the 70th percentile for waist, and to the 40th percentile for the triceps/subscapular skinfolds ratio. CONCLUSION Waist circumference seems to be the best predictor of children with the metabolic syndrome in paediatric clinical settings.
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Affiliation(s)
- L A Moreno
- E. U. Ciencias de la Salud, Universidad de Zaragoza, Zaragoza, Spain.
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Muñoz-Valle JF, Vázquez-Del Mercado M, García-Iglesias T, Orozco-Barocio G, Bernard-Medina G, Martínez-Bonilla G, Bastidas-Ramírez BE, Navarro AD, Bueno M, Martínez-López E, Best-Aguilera CR, Kamachi M, Armendáriz-Borunda J. T(H)1/T(H)2 cytokine profile, metalloprotease-9 activity and hormonal status in pregnant rheumatoid arthritis and systemic lupus erythematosus patients. Clin Exp Immunol 2003; 131:377-84. [PMID: 12562402 PMCID: PMC1808625 DOI: 10.1046/j.1365-2249.2003.02059.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
During the course of rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE), several immune and neuroendocrine changes associated with pregnancy may exert positive (amelioration) or negative (exacerbation) effects on the clinical outcome. In order to shed light on the mechanisms underlying these responses, we performed a prospective longitudinal study in RA and SLE pregnant women, including healthy pregnant women as a control group. Cytokine messenger RNA (mRNA) expression assessed by quantitative competitive polymerase chain reaction (PCR) in peripheral blood mononuclear cells (PBMC), cytokine levels and lymphocyte proliferation responses (LPR) following phytohaemagglutinin (PHA) stimulation of PBMC, plasma metalloprotease-9 activity (MMP-9) and hormonal status during pregnancy were determined. TNFa was the most abundant cytokine mRNA expressed in PBMC in all groups studied (healthy pregnant women, RA and SLE pregnant patients). However, a general TH2 response reflected by high IL-10 levels was found in RA, as well as SLE, patients. A significant change in IFN-gamma was observed in RA patients but only during the first trimester of pregnancy. This compared with a major TH1 response in healthy pregnant women. Interestingly, our study showed a homogeneous hormonal pattern in RA and SLE patients. Although decreased cortisol levels were observed in all patients studied, this is possibly related to the remission of disease activity status brought about by steroid treatment before and during pregnancy. In summary, we suggest that complex immune and hormonal networks are involved in pregnancy and that rheumatic diseases are very dynamic immune processes that cannot be described with a clear-cut cytokine profile. Furthermore, the observations in this study may reflect treatment-related immune effects more than those associated with disease.
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Affiliation(s)
- J F Muñoz-Valle
- Instituto de Biología Molecular en Medicina y Terapia Génica, CUCS, Universidad de Guadalajara, Mexico
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