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Chafer M, Perez S, Chiralt A. Kinetics of Solute Gain and Water Loss During Osmotic Dehydration of Orange Slices. FOOD SCI TECHNOL INT 2016. [DOI: 10.1177/1082013203040545] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The effect of the osmotic solution (sucrose and dextrose syrups) on the kinetics and process yield was evaluated on osmotic dehydration of orange (Valencia Late var.). Processes were carried out at 30 C, using 35, 45, 55 and 65 Brix solutions and by applying a vacuum pulse (100 mbar for 10 min) at the beginning of the process. Kinetics of sugar gain-water loss and mass changes were analysed by separately considering peel and pulp fractions of orange slices. Mass transport properties of orange slices in osmotic treatments were different for pulp and peel fractions due to the different contributions of the mechanisms involved. Faster water and solute transport were observed in the peel impregnated with the osmotic solution. Sugar gain in sucrose solutions was enhanced in comparison with dextrose treatments, whereas diffusional water loss was faster in samples treated with dextrose. These effects made the process yield higher for sucrose treatments. An increase in the osmotic solution concentration implied higher mass transport rates, but did not notably affect process yield.
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Padilla C, Kihal-Talantikit W, Perez S, Deguen S. Création d’indicateurs géographiques pour caractériser les disparités territoriales de santé, Nice, France. Rev Epidemiol Sante Publique 2016. [DOI: 10.1016/j.respe.2016.06.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Marchetti R, Perez S, Arda A, Imberty A, Jimenez‐Barbero J, Silipo A, Molinaro A. "Rules of Engagement" of Protein-Glycoconjugate Interactions: A Molecular View Achievable by using NMR Spectroscopy and Molecular Modeling. ChemistryOpen 2016; 5:274-96. [PMID: 27547635 PMCID: PMC4981046 DOI: 10.1002/open.201600024] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Indexed: 12/20/2022] Open
Abstract
Understanding the dynamics of protein-ligand interactions, which lie at the heart of host-pathogen recognition, represents a crucial step to clarify the molecular determinants implicated in binding events, as well as to optimize the design of new molecules with therapeutic aims. Over the last decade, advances in complementary biophysical and spectroscopic methods permitted us to deeply dissect the fine structural details of biologically relevant molecular recognition processes with high resolution. This Review focuses on the development and use of modern nuclear magnetic resonance (NMR) techniques to dissect binding events. These spectroscopic methods, complementing X-ray crystallography and molecular modeling methodologies, will be taken into account as indispensable tools to provide a complete picture of protein-glycoconjugate binding mechanisms related to biomedicine applications against infectious diseases.
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Widerstrom-Noga E, Anderson K, Perez S, Hunter J, Martinez-Arizala A, Adcock J, Escalona M. (112) Perspectives on living with chronic pain after spinal cord injury. THE JOURNAL OF PAIN 2016. [DOI: 10.1016/j.jpain.2016.01.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Rosch R, Trosseille C, Caillaud T, Allouche V, Bourgade JL, Briat M, Brunel P, Burillo M, Casner A, Depierreux S, Gontier D, Jadaud JP, Le Breton JP, Llavador P, Loupias B, Miquel JL, Oudot G, Perez S, Raimbourg J, Rousseau A, Rousseaux C, Rubbelynck C, Stemmler P, Troussel P, Ulmer JL, Wrobel R, Beauvais P, Pallet M, Prevot V. First set of gated x-ray imaging diagnostics for the Laser Megajoule facility. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:033706. [PMID: 27036783 DOI: 10.1063/1.4942930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The Laser Megajoule (LMJ) facility located at CEA/CESTA started to operate in the early 2014 with two quadruplets (20 kJ at 351 nm) focused on target for the first experimental campaign. We present here the first set of gated x-ray imaging (GXI) diagnostics implemented on LMJ since mid-2014. This set consists of two imaging diagnostics with spatial, temporal, and broadband spectral resolution. These diagnostics will give basic measurements, during the entire life of the facility, such as position, structure, and balance of beams, but they will also be used to characterize gas filled target implosion symmetry and timing, to study x-ray radiography and hydrodynamic instabilities. The design requires a vulnerability approach, because components will operate in a harsh environment induced by neutron fluxes, gamma rays, debris, and shrapnel. Grazing incidence x-ray microscopes are fielded as far as possible away from the target to minimize potential damage and signal noise due to these sources. These imaging diagnostics incorporate microscopes with large source-to-optic distance and large size gated microchannel plate detectors. Microscopes include optics with grazing incidence mirrors, pinholes, and refractive lenses. Spatial, temporal, and spectral performances have been measured on x-ray tubes and UV lasers at CEA-DIF and at Physikalisch-Technische Bundesanstalt BESSY II synchrotron prior to be set on LMJ. GXI-1 and GXI-2 designs, metrology, and first experiments on LMJ are presented here.
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Dinamarca F, Galindo L, Grifell M, Perez E, Chavarria V, Salgado P, Perez S. The agitated patient; need for mechanical restraint and prevention measures in relation to psychiatric diagnosis. Eur Psychiatry 2016. [DOI: 10.1016/j.eurpsy.2016.01.754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
IntroductionPsychomotor agitation is a common psychiatric emergency in our environment that can occur in a wide clinical spectrum. Both the agitation itself as the procedures for their control, carry an implicit risk to patient safety and health workers.ObjectiveTo describe the prevention measures used in patients requiring mechanical restraint in relation to diagnosis of psychiatric disorders.Material and methodsThis is a naturalistic descriptive study. Mechanical restraints made in brief psychiatric hospitalization units of “Hospital del Mar” between January of 2013 to March of 2015, were analyzed by diagnosis. Proportions of the prevention intervention performed by nurses in each episode were compared. The groups of prevention interventions done were: “verbal approach”, “environmental measures”, “psychopharmacological intervention”, “observation increase” and “inability for applying any measure because unpredictability”.ResultsA total of 2986 mechanical restraints were done in brief hospitalization units. Among the results, we find that verbal approach measure was use in 77.23% of patient with personality disorders. Environmental measures were used in 40% of the total of restraints. The most of psychopharmacological intervention was done in alcohol intoxication (50%) and then in psychotic spectrum (42.01%). The inability for applying measures was greater in alcohol intoxication (45.4%).ConclusionSome of the results of this study are interesting and consistent with clinical practice (for example, effectivity of pharmacological intervention in psychosis and bipolar disorders, as well verbal approach in anxiety, etc.), we can predict the usefulness of measures applied to prevent a mechanical restraint. Further research is needed in this topic.Disclosure of interestL. Galindo is a Rio-Hortega-fellowship – (ISC-III; CM14/00111).
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Varki A, Cummings RD, Aebi M, Packer NH, Seeberger PH, Esko JD, Stanley P, Hart G, Darvill A, Kinoshita T, Prestegard JJ, Schnaar RL, Freeze HH, Marth JD, Bertozzi CR, Etzler ME, Frank M, Vliegenthart JF, Lütteke T, Perez S, Bolton E, Rudd P, Paulson J, Kanehisa M, Toukach P, Aoki-Kinoshita KF, Dell A, Narimatsu H, York W, Taniguchi N, Kornfeld S. Symbol Nomenclature for Graphical Representations of Glycans. Glycobiology 2016; 25:1323-4. [PMID: 26543186 DOI: 10.1093/glycob/cwv091] [Citation(s) in RCA: 699] [Impact Index Per Article: 87.4] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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de Brot S, Perez S, Shivaprasad HL, Baiker K, Polledo L, Clark M, Grau-Roma L. Wooden breast lesions in broiler chickens in the UK. Vet Rec 2016; 178:141. [PMID: 26755613 DOI: 10.1136/vr.103561] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/08/2015] [Indexed: 11/04/2022]
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Sarkar A, Drouillard S, Rivet A, Perez S. Databases of Conformations and NMR Structures of Glycan Determinants. Glycobiology 2015; 25:1480-90. [PMID: 26240168 DOI: 10.1093/glycob/cwv054] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 07/15/2015] [Indexed: 11/13/2022] Open
Abstract
The present study reports a comprehensive nuclear magnetic resonance (NMR) characterization and a systematic conformational sampling of the conformational preferences of 170 glycan moieties of glycosphingolipids as produced in large-scale quantities by bacterial fermentation. These glycans span across a variety of families including the blood group antigens (A, B and O), core structures (Types 1, 2 and 4), fucosylated oligosaccharides (core and lacto-series), sialylated oligosaccharides (Types 1 and 2), Lewis antigens, GPI-anchors and globosides. A complementary set of about 100 glycan determinants occurring in glycoproteins and glycosaminoglycans has also been structurally characterized using molecular mechanics-based computation. The experimental and computational data generated are organized in two relational databases that can be queried by the user through a user-friendly search engine. The NMR ((1)H and (13)C, COSY, TOCSY, HMQC, HMBC correlation) spectra and 3D structures are available for visualization and download in commonly used structure formats. Emphasis has been given to the use of a common nomenclature for the structural encoding of the carbohydrates and each glycan molecule is described by four different types of representations in order to cope with the different usages in chemistry and biology. These web-based databases were developed with non-proprietary software and are open access for the scientific community available at http://glyco3d.cermav.cnrs.fr.
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Gianvincenzo PD, Calvo J, Perez S, Álvarez A, Bedoya LM, Alcamí J, Penadés S. Negatively charged glyconanoparticles modulate and stabilize the secondary structures of a gp120 V3 loop peptide: toward fully synthetic HIV vaccine candidates. Bioconjug Chem 2015; 26:755-65. [PMID: 25734507 DOI: 10.1021/acs.bioconjchem.5b00077] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The third variable region (V3 peptide) of the HIV-1 gp120 is a major immunogenic domain of HIV-1. Controlling the formation of the immunologically active conformation is a crucial step to the rational design of fully synthetic candidate vaccines. Herein, we present the modulation and stabilization of either the α-helix or β-strand conformation of the V3 peptide by conjugation to negatively charged gold glyconanoparticles (GNPs). The formation of the secondary structure can be triggered by the variation of the buffer concentration and/or pH as indicated by circular dichoism. The peptide on the GNPs shows increased stability toward peptidase degradation as compared to the free peptide. Moreover, only the V3β-GNPs bind to the anti-V3 human broadly neutralizing mAb 447-52D as demonstrated by surface plasmon resonance (SPR). The strong binding of V3β-GNPs to the 447-52D mAb was the starting point to address its study as immunogen. V3β-GNPs elicit antibodies in rabbits that recognize a recombinant gp120 and the serum displayed low but consistent neutralizing activity. These results open up the way for the design of new fully synthetic HIV vaccine candidates.
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Marino S, Perez S, Casassus S. SHADOWS CAST BY A WARP IN THE HD 142527 PROTOPLANETARY DISK. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/2041-8205/798/2/l44] [Citation(s) in RCA: 177] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Mendoza R, Perez S, de Los Santos MJ, Larreategui Z, Ayerdi F, Expósito A, Burgos J, Martínez Indart L, Pijoan JI, Matorras R. Congenital malformations, chromosomal abnormalities and perinatal results in IVF/ICSI newborns resulting from very poor quality embryos: a case-control study. Gynecol Obstet Invest 2014; 79:83-9. [PMID: 25358724 DOI: 10.1159/000353605] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Accepted: 06/04/2013] [Indexed: 11/19/2022]
Abstract
AIMS To explore whether the transfer of very poor quality (VPQ) embryos is associated with an increase in congenital malformations or perinatal problems. METHODS In this retrospective case-control study, 74 children conceived by in vitro fertilization (IVF) and/or intracytoplasmic sperm injection (ICSI) resulting exclusively from the transfer of VPQ embryos were compared with 1,507 children born after the transfer of top morphological quality (TQ) embryos over the same period of time in the same centers. RESULTS The prevalence of birth defects in children resulting from VPQ embryos was 1.35% (1/74), similar to the 1.72% (26/1,507) when only TQ embryos were transferred; the rate of chromosomal abnormalities detected was also similar (0.0 vs. 0.4%), as was perinatal mortality. After correcting for multiplicity (higher in the TQ group), the aforementioned parameters remained similar in the two groups. CONCLUSION Congenital malformations and perinatal complications do not seem to be more common in children born after transfer of VPQ embryos in IVF/ICSI cycles. Given our preliminary data, which need to be confirmed in much larger studies, when only VPQ embryos are available for transfer in IVF/ICSI cycles, we do not believe that they should be discarded with the intention of avoiding birth defects or perinatal complications.
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Martínez-Galdámez M, Gil A, Caniego JL, Gonzalez E, Bárcena E, Perez S, Garcia-Bermejo P, Ortega-Gutierrez S. Preliminary experience with the Pipeline Flex Embolization Device: technical note. J Neurointerv Surg 2014; 7:748-51. [PMID: 25165385 DOI: 10.1136/neurintsurg-2014-011385] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Accepted: 08/04/2014] [Indexed: 11/04/2022]
Abstract
BACKGROUND Clinical experience with the Pipeline Embolization Device (PED) has been widely described in the literature since it obtained its European CE and FDA approvals in 2008 and 2011, respectively. The new generation of PED, the Pipeline Flex Embolization Device, received the CE mark of approval in March 2014. While the implant composition has not changed, its new delivery system has some differences. One of the main changes from the previous generation is a new delivery system that makes the device resheathable until deployed over 90% of its length. We present our preliminary experience using this device. METHODS Between May and June 2014, six patients with six aneurysms were treated with the Pipeline Flex device. RESULTS All devices were placed properly, without technical difficulties. We successfully resheathed and repositioned the device in two cases. Minor and major intraprocedural or periprocedural events were noted. CONCLUSIONS The Pipeline Flex device allows more precise and controlled deployment than the current PED device. Although this preliminary experience seems positive, multicenter larger series will be needed to confirm the safety and durability of this new device.
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Lamiquiz-Moneo I, Perez S, Gallego RM, Cenarro A, Civeira F, De Castro-Orós I. Genetic variants in ABCG5 and its association with primary hypercholesterolemia. Atherosclerosis 2014. [DOI: 10.1016/j.atherosclerosis.2014.05.587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ferreira V, Reis CA, Perez S, Rauter AP, Videira PA. Meeting report on EMBO workshop: glycobiology and glycochemistry, applications to human health and disease. Glycobiology 2014; 24:782-3. [PMID: 25028393 DOI: 10.1093/glycob/cwu070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Paredes E, Perez S, Rodil R, Quintana JB, Beiras R. Ecotoxicological evaluation of four UV filters using marine organisms from different trophic levels Isochrysis galbana, Mytilus galloprovincialis, Paracentrotus lividus, and Siriella armata. CHEMOSPHERE 2014; 104:44-50. [PMID: 24359924 DOI: 10.1016/j.chemosphere.2013.10.053] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 10/18/2013] [Accepted: 10/20/2013] [Indexed: 06/03/2023]
Abstract
Due to the concern about the negative effects of exposure to sunlight, combinations of UV filters like 4-Methylbenzylidene-camphor (4-MBC), Benzophenone-3 (BP-3), Benzophenone-4 (BP-4) and 2-Ethylhexyl-4-methoxycinnamate (EHMC) are being introduced in all kind of cosmetic formulas. These chemicals are acquiring a concerning status due to their increasingly common use and the potential risk for the environment. The aim of this study is to assess the behaviour of these compounds in seawater, the toxicity to marine organisms from three trophic levels including autotrophs (Isochrysis galbana), herbivores (Mytilus galloprovincialis and Paracentrotus lividus) and carnivores (Siriella armata), and set a preliminary assessment of potential ecological risk of UV filters in coastal ecosystems. In general, EC50 results show that both EHMC and 4-MBC are the most toxic for our test species, followed by BP-3 and finally BP-4. The most affected species by the presence of these UV filters are the microalgae I. galbana, which showed toxicity thresholds in the range of μg L(-1) units, followed by S. armata>P. Lividus>M. galloprovincialis. The UV filter concentrations measured in the sampled beach water were in the range of tens or even hundreds of ng L(-1). The resulting risk quotients showed appreciable environmental risk in coastal environments for BP-3 and 4-MBC.
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Trevino A, Soriano V, Poveda E, Parra P, Cabezas T, Caballero E, Roc L, Rodriguez C, Eiros JM, Lopez M, De Mendoza C, Rodriguez C, del Romero J, Tuset C, Marcaida G, Ocete MD, Tuset T, Caballero E, Molina I, Aguilera A, Rodriguez-Calvino JJ, Navarro D, Regueiro B, Benito R, Gil J, Borras M, Ortiz de Lejarazu R, Eiros JM, Manzardo C, Miro JM, Garcia J, Paz I, Calderon E, Leal M, Vallejo A, Abad M, Dronda F, Moreno S, Escudero D, Trigo M, Diz J, Alvarez P, Cortizo S, Garcia-Campello M, Rodriguez-Iglesias M, Hernandez-Betancor A, Martin AM, Ramos JM, Gutierrez F, Rodriguez JC, Gomez-Hernando C, Guelar A, Cilla G, Perez-Trallero E, Lopez-Aldeguer J, Sola J, Fernandez-Pereira L, Niubo J, Hernandez M, Lopez-Lirola AM, Gomez-Sirvent JL, Force L, Cifuentes C, Perez S, Morano L, Raya C, Gonzalez-Praetorius A, Perez JL, Penaranda M, Mena A, Montejo JM, Roc L, Martinez-Sapina A, Viciana I, Cabezas T, Lozano A, Fernandez JM, Garcia Bermejo I, Gaspar G, Garcia R, Gorgolas M, Miralles P, Aldamiz T, Garcia F, Suarez A, Trevino A, Parra P, de Mendoza C, Soriano V. HIV-2 viral tropism influences CD4+ T cell count regardless of viral load. J Antimicrob Chemother 2014; 69:2191-4. [DOI: 10.1093/jac/dku119] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Néron S, Perez S, Benc R, Bellman A, Rosberger Z, Vuong T. The experience of pain and anxiety in rectal cancer patients during high-dose-rate brachytherapy. ACTA ACUST UNITED AC 2014; 21:e89-95. [PMID: 24523626 DOI: 10.3747/co.21.1741] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Pain and anxiety have been reported as primary concerns for patients with head-and-neck, gynecologic, and prostate cancers undergoing high dose rate (hdr) brachytherapy. However, almost no research has been published on the degree to which these symptoms are experienced by rectal cancer patients undergoing hdr brachytherapy. We conducted a pilot study examining the experiences of rectal cancer patients during hdr brachytherapy, specifically the intensity and trajectory of their anxiety and pain. METHODS Rectal cancer patients (n = 25) who received hdr brachytherapy treatment at a hospital in Montreal, Quebec, completed verbal analog scales for pain and anxiety at 4 time points over 4 treatment days. RESULTS On all 4 days, a subset of patients reported moderate-to-severe anxiety before applicator insertion. Pain increased significantly from the time patients were lying on the table to immediately after insertion of the applicator (p < 0.001). Insertion of the applicator appears to be the most painful part of the procedure, and although anxiety declined to below baseline after applicator removal, pain remained somewhat elevated. Some patients required conscious sedation; however, reports of moderate-to-severe pain were more frequent from patients who received pain medications than from patients who did not receive such medication (p < 0.05). CONCLUSIONS Most patients with rectal cancer tolerated hdr rectal brachytherapy well, although the procedure is stressful and painful for some. Insertion of the applicator was found to be the point of maximal pain, and medication was not always completely successful at alleviating the pain, suggesting that additional psychosocial interventions might be needed, with particular emphasis on the time of applicator insertion.
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Ellenbogen JR, Perez S, Parks C, Crooks D, Mallucci C. Cerebellopontine angle oligodendroglioma in a child: first case report. Childs Nerv Syst 2014; 30:185-7. [PMID: 24057420 DOI: 10.1007/s00381-013-2282-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 09/12/2013] [Indexed: 10/26/2022]
Abstract
The reported incidence of oligodendrogliomas in the paediatric population is less than 1 %. The posterior fossa is a rare location, with the vast majority arising in the cerebral hemispheres. We report the first paediatric case of a WHO grade II oligodendroglioma arising in the cerebellopontine angle (CPA). CPA oligodendrogliomas in children appear to behave aggressively and adjuvant therapy must be considered early; especially when complete resection cannot be achieved.
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Jelic A, Michael I, Achilleos A, Hapeshi E, Lambropoulou D, Perez S, Petrovic M, Fatta-Kassinos D, Barcelo D. Transformation products and reaction pathways of carbamazepine during photocatalytic and sonophotocatalytic treatment. JOURNAL OF HAZARDOUS MATERIALS 2013; 263 Pt 1:177-86. [PMID: 23972790 DOI: 10.1016/j.jhazmat.2013.07.068] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Revised: 06/29/2013] [Accepted: 07/30/2013] [Indexed: 05/25/2023]
Abstract
This study examines the degradation of the antiepileptic carbamazepine (CBZ) by sonolysis, TiO2-based heterogeneous photocatalysis under UV-A and simulated solar irradiation, and by the combined use of UV-A and ultrasound irradiation (i.e. sonophotocatalysis) in demineralized water, ground water and effluent wastewater. The processes were compared with respect to substrate conversion rate and the extent of DOC reduction as a measure of mineralization. CBZ was degraded following a pseudo-first order kinetics. Sonophotocatalysis provided the highest rate of CBZ transformation over the time-course of the experiment while the degree of DOC removal in pure water was similar for all the studied treatments (around 40%), and always lower than CBZ conversion. This indicated that a considerable organic load remained in the treated solutions that could also be attributed to the presence of persistent oxidation products. UPLC-(+ESI)-QToF-MS was employed to determine major CBZ-related transformation products. Several recalcitrant hydroxy- and keto-derivatives of CBZ were tentatively identified. A Daphnia magna bioassay was used to evaluate the potential toxicity of the samples collected at different time points showing that the mixtures were highly toxic to D. magna.
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Chauve M, Huron M, Hudebine D, Decottignies D, Perez S, Ferreira NL. Kinetic Modeling of β-Glucosidases and Cellobiohydrolases Involved in Enzymatic Hydrolysis of Cellulose. Ind Biotechnol (New Rochelle N Y) 2013. [DOI: 10.1089/ind.2013.0006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Marcos Alises J, Perez S, Gumbao D, Silva MM, Meseguer M, Landeras Gutierrez J. Contraction of blastocyst is strongly related with lower implantation success; a time-lapse study. Fertil Steril 2013. [DOI: 10.1016/j.fertnstert.2013.07.303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Michael I, Hapeshi E, Aceña J, Perez S, Petrović M, Zapata A, Barceló D, Malato S, Fatta-Kassinos D. Light-induced catalytic transformation of ofloxacin by solar Fenton in various water matrices at a pilot plant: mineralization and characterization of major intermediate products. THE SCIENCE OF THE TOTAL ENVIRONMENT 2013; 461-462:39-48. [PMID: 23712114 DOI: 10.1016/j.scitotenv.2013.04.054] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 04/05/2013] [Accepted: 04/18/2013] [Indexed: 06/02/2023]
Abstract
This work investigated the application of a solar driven advanced oxidation process (solar Fenton), for the degradation of the antibiotic ofloxacin (OFX) in various environmental matrices at a pilot-scale. All experiments were carried out in a compound parabolic collector pilot plant in the presence of doses of H2O2 (2.5 mg L(-1)) and at an initial Fe(2+) concentration of 2 mg L(-1). The water matrices used for the solar Fenton experiments were: demineralized water (DW), simulated natural freshwater (SW), simulated effluent from municipal wastewater treatment plant (SWW) and pre-treated real effluent from municipal wastewater treatment plant (RE) to which OFX had been spiked at 10 mg L(-1). Dissolved organic carbon removal was found to be dependent on the chemical composition of the water matrix. OFX mineralization was higher in DW (78.1%) than in SW (58.3%) at 12 mg L(-1) of H2O2 consumption, implying the complexation of iron or the scavenging of hydroxyl radicals by the inorganic ions present in SW. On the other hand, the presence of dissolved organic matter (DOM) in SWW and RE, led to lower mineralization per dose of H2O2 compared to DW and SW. The major transformation products (TPs) formed during the solar Fenton treatment of OFX, were elucidated using liquid chromatography-time of flight-mass spectrometry (LC-ToF-MS). The transformation of OFX proceeded through a defluorination reaction, accompanied by some degree of piperazine and quinolone substituent transformation while a hydroxylation mechanism occurred by attack of the hydroxyl radicals generated during the process leading to the formation of TPs in all the water matrices, seven of which were tentatively identified. The results obtained from the toxicity bioassays indicated that the toxicity originates from the DOM present in RE and its oxidation products formed during the photocatalytic treatment and not from the TPs resulted from the oxidation of OFX.
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Topin J, Arnaud J, Sarkar A, Audfray A, Gillon E, Perez S, Jamet H, Varrot A, Imberty A, Thomas A. Deciphering the glycan preference of bacterial lectins by glycan array and molecular docking with validation by microcalorimetry and crystallography. PLoS One 2013; 8:e71149. [PMID: 23976992 PMCID: PMC3747263 DOI: 10.1371/journal.pone.0071149] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 06/26/2013] [Indexed: 11/18/2022] Open
Abstract
Recent advances in glycobiology revealed the essential role of lectins for deciphering the glycocode by specific recognition of carbohydrates. Integrated multiscale approaches are needed for characterizing lectin specificity: combining on one hand high-throughput analysis by glycan array experiments and systematic molecular docking of oligosaccharide libraries and on the other hand detailed analysis of the lectin/oligosaccharide interaction by x-ray crystallography, microcalorimetry and free energy calculations. The lectins LecB from Pseudomonas aeruginosa and BambL from Burkholderia ambifaria are part of the virulence factors used by the pathogenic bacteria to invade the targeted host. These two lectins are not related but both recognize fucosylated oligosaccharides such as the histo-blood group oligosaccharides of the ABH(O) and Lewis epitopes. The specificities were characterized using semi-quantitative data from glycan array and analyzed by molecular docking with the Glide software. Reliable prediction of protein/oligosaccharide structures could be obtained as validated by existing crystal structures of complexes. Additionally, the crystal structure of BambL/Lewis x was determined at 1.6 Å resolution, which confirms that Lewis x has to adopt a high-energy conformation so as to bind to this lectin. Free energies of binding were calculated using a procedure combining the Glide docking protocol followed by free energy rescoring with the Prime/Molecular Mechanics Generalized Born Surface Area (MM-GBSA) method. The calculated data were in reasonable agreement with experimental free energies of binding obtained by titration microcalorimetry. The established predictive protocol is proposed to rationalize large sets of data such as glycan arrays and to help in lead discovery projects based on such high throughput technology.
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Sala L, Perez S, Fernandez A, Humbría A, Vicente E, Llorente I, García de Vicuña R, Castañeda S. AB0462 Large vessel vasculitis refractory to conventional therapy. experience with tocilizumab. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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