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1. Neural network-based prediction of particle-induced fission cross sections for r-process nucleosynthesis trained with dynamical reaction models

Author

Rodríguez-Sánchez, J. L., García-Jiménez, G., Alvarez-Pol, H., Feijoo-Fontán, M., and Graña-González, A.

Subjects
Nuclear Theory
Abstract

Large-scale computations of fission properties play a crucial role in nuclear reaction network calculations simulating rapid neutron-capture process (r-process) nucleosynthesis. Due to the large number of fissioning nuclei contributing to the r-process, a description of particle-induced fission reactions is computationally challenging. In this work, we use theoretical calculations based on the INCL+ABLA models to train neural networks (NN). The results for the prediction of proton-induced spallation reactions, in particular fission, utilizing a large variety of NN models across the hyper-parameter space are presented, which are relevant for r-process calculations., Comment: 3 pages, 1 figure, NN2024 conference

Published
2025

2. Precise measurement of nuclear interaction cross sections towards neutron-skin determination with R3B

Author

Ponnath, L., Aumann, T., Bertulani, C.A., Gernhäuser, R., Almusidi, T., Alvarez-Pol, H., Atar, L., Atkins, L., Ayyad, Y., Benlliure, J., Boretzky, K., Borge, M.J.G., Bott, L.T., Bruni, G., Brückner, B., Cabanelas, P., Caesar, C., Casarejos, E., Cederkall, J., Corsi, A., Cortina-Gil, D., Dueñas, J.A., Duer, M., Elekes, Z., Escribano Rodriguez, S., Falduto, A., Feijoo, M., Feijoo Fontan, M., Fonseca, L.M., Frotscher, A., Galaviz, D., Galiana, E., García-Jiménez, G., Gašparić, I., Geraci, E.I., Gillibert, A., Gnoffo, B., González Caamaño, D., Graña González, A., Göbel, K., Hartig, A.-L., Heil, M., Heinz, A., Hensel, T., Holl, M., Horvat, A., Jedele, A., Jelavić Malenica, D., Jenegger, T., Johansson, H.T., Jonson, B., Kalantar-Nayestanaki, N., Kelic-Heil, A., Kiselev, O.A., Klenze, P., Kresan, D., Kröll, T., Kudaibergenova, E., Kurtulgil, D., Körper, D., Labiche, M., Langer, C., Lihtar, I., Litvinov, Yu.A., Löher, B., Mayer, J., Mozumdar, N., Murillo Morales, S., Nacher, E., Nilsson, T., Obertelli, A., Panin, V., Park, J., Paschalis, S., Perea, A., Petri, M., Pirrone, S., Pohl, T., Reifarth, R., Rhee, H.-B., Rodriguez-Sanchez, J.L., Rose, L., Rossi, D.M., Russotto, P., Savran, D., Scheit, H., Simon, H., Storck-Dutine, S., Stott, A.M., Sun, Y., Sürder, C., Taniuchi, R., Tengblad, O., Teubig, P., Trache, L., Trimarchi, M., Törnqvist, H.T., Wagner, V., and Wamers, F.

Published
2025
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3. A compact start time counter using plastic scintillators readout with MPPC arrays for the WASA-FRS HypHI experiment

Author

Liu, E., Drozd, V., Ekawa, H., Escrig, S., Gao, Y., He, Y., Kasagi, A., Nakagawa, M., Ong, H., Rappold, C., Sekiya, R., Saito, T.R., Tang, X., Tanaka, Y.K., Wang, H., Yanai, A., Achenbach, P., Alfaki, H. Alibrahim, Amjad, F., Armstrong, M., Behr, K.-H., Benlliure, J., Brencic, Z., Dickel, T., Dubey, S., Feijoo-Fontán, M., Fujioka, H., Geissel, H., Goldenbaum, F., González, A. Graña, Haettner, E., Harakeh, M.N., Heggen, H., Hornung, C., Hubbard, N., Itahashi, K., Iwasaki, M., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kazantseva, E., Khreptak, A., Kindler, B., Knoebel, R., Kollmus, H., Kostyleva, D., Kraft-Bermuth, S., Kurz, N., Lommel, B., Minami, S., Morrissey, D.J., Moskal, P., Mukha, I., Muneem, A., Nakazawa, K., Nociforo, C., Pietri, S., Pochodzalla, J., Purushothaman, S., Rocco, E., Rodríguez-Sánchez, J.L., Roy, P., Ruber, R., Schadmand, S., Scheidenberger, C., Schwarz, P., Serdyuk, V., Skurzok, M., Streicher, B., Suzuki, K., Szczepanczyk, B., Tortorelli, N., Vencelj, M., Weber, T., Weick, H., Will, M., Wimmer, K., Yamamoto, A., Yoshida, J., and Zhao, J.

Published
2024
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5. The WASA-FRS project at GSI and its perspective

Author

Saito, T.R., Achenbach, P., Alfaki, H. Alibrahim, Amjad, F., Armstrong, M., Behr, K.-H., Benlliure, J., Brencic, Z., Dickel, T., Drozd, V., Dubey, S., Ekawa, H., Escrig, S., Feijoo-Fontán, M., Fujioka, H., Gao, Y., Geissel, H., Goldenbaum, F., González, A. Graña, Haettner, E., Harakeh, M.N., He, Y., Heggen, H., Hornung, C., Hubbard, N., Itahashi, K., Iwasaki, M., Kalantar-Nayestanaki, N., Kasagi, A., Kavatsyuk, M., Kazantseva, E., Khreptak, A., Kindler, B., Knoebel, R., Kollmus, H., Kostyleva, D., Kraft-Bermuth, S., Kurz, N., Liu, E., Lommel, B., Metag, V., Minami, S., Morrissey, D.J., Moskal, P., Mukha, I., Muneem, A., Nakagawa, M., Nakazawa, K., Nociforo, C., Ong, H.J., Pietri, S., Pochodzalla, J., Purushothaman, S., Rappold, C., Rocco, E., Rodríguez-Sánchez, J.L., Roy, P., Ruber, R., Schadmand, S., Scheidenberger, C., Schwarz, P., Sekiya, R., Serdyuk, V., Skurzok, M., Streicher, B., Suzuki, K., Szczepanczyk, B., Tanaka, Y.K., Tang, X., Tortorelli, N., Vencelj, M., Wang, H., Weber, T., Weick, H., Will, M., Wimmer, K., Yamamoto, A., Yanai, A., Yoshida, J., and Zhao, J.

Published
2023
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8. Study of multinucleon knockout reactions of exotic nuclei in the region of Sn

Author

Feijoo-Fontán M., Kudaibergenova E., Liblar I., Gasparic I., Horvat A., Rodriguez-Sanchez J.L., Panin V., Alvarez-Pol H., Atar L., Aumann T., Benlliure J., Boretzky K., Borge M.J.G., Bott L.T., Caesar C., Casarejos E., Cederkall J., Chatillon A., Cortina-Gil D., Filippo E., Dickel T., Duer M., Falduto A., Galaviz D., García-Jiménez G., Ge Z., Geraci E.I., Gernhäuser R., Gnoffo B., Graña-González A., Göbel K., Haettner E., Hartig A.L., Heil M., Heinz A., Hensel T., Holl M., Hornung C., Jedele A., Jelavic-Malenica D., Jenegger T., Ji L., Johansson H.T., Kalantar-Nayestanaki N., Kazantseva E., Kelic-Heil A., Kiselev O.A., Klenze P., Knoebel R., Körper D., Kröll T., Löher B., Martorana N.S., Milhomens da Fonseca L., Morfouace P., Mukha I., Murillo-Morales S., Nácher E., Nociforo C., Obertelli A., Paschalis S., Perea A., Petri M., Pietri S., Pirrone S., Ponnath L., Rhee H.B., Rose L., Rossi D.M., Russotto P., Savran D., Scheidenberger C., Simon H., Simon J.P., Storck-Dunite S., Stott A., Sun Y., Symochko D., Sürder C., Taïeb J., Taniuchi R., Tengblad O., Törnqvist H.T., Velardita S., Wamers F., Weick H., and Zhao J.

Subjects
Physics, QC1-999
Abstract

The experimental data collected during the S515 experiment performed by the R3B collaboration at GSI/FAIR represent a great opportunity to investigate nucleon knockout reactions of exotic nuclei in the region of Sn using complete kinematics measurements. These cross sections can be used in the future to investigate the quenching in the knockout of the minority species (neutrons or protons) in nuclei far from stability. Some of the arguments put forward are the underestimation of the knockout of deeply bound nucleons, final state interactions or the role of short-range correlations (SRC). Recently, several works based on inclusive measurements have shown that these SRCs could reduce the single nucleon knockout cross sections by around 50%, depending on the neutron excess (N/Z) of the initial projectile. The S515 data can help us to go further in this investigation because it allows to correlate the knockout cross sections of one, two or more nucleons with the number of protons and neutrons emitted from the target and which can be detected by the CALIFA and NeuLAND detectors, respectively, and perform complete kinematical studies on the nature of the event (SRC, evaporation, emission of clusters, final-state interactions...). Here the results obtained for the charge distribution of reaction residues are presented, which is one of the first steps of the still on-going analysis.

Published
2023
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9. Measurements of the Reaction Cross Sections of Neutron-rich Sn Isotopes at the R\(^3\)B Setup

Author

Kudaibergenova, E., primary, Lihtar, I., additional, Feijoo-Fontán, M., additional, Aumann, T., additional, Bertulani, C.A., additional, Gašparić, I., additional, Horvat, A., additional, Panin, V., additional, Rodríguez-Sánchez, J.L., additional, Rossi, D., additional, Storck-Dutine, S., additional, Törnqvist, H.T., additional, Alvarez-Pol, H., additional, Atar, L., additional, Benlliure, J., additional, Boretzky, K., additional, Bott, L.T., additional, Caesar, C., additional, Casarejos, E., additional, Cederkall, J., additional, Chatillon, A., additional, Cortina-Gil, D., additional, de Filippo, E., additional, Dickel, T., additional, Duer, M., additional, Falduto, A., additional, Fonseca, L.M., additional, Galaviz, D., additional, García-Jiménez, G., additional, Ge, Z., additional, Geraci, E.I., additional, Gernhüser, R., additional, Gnoffo, B., additional, Graña-González, A., additional, Göbel, K., additional, Hartig, A.L., additional, Heil, M., additional, Heinz, A., additional, Hensel, T., additional, Holl, M., additional, Jedele, A., additional, Jelavic-Malenica, D., additional, Jenegger, T., additional, Ji, L., additional, Johansson, H.T., additional, Jonson, B., additional, Kalantar-Nayestanaki, N., additional, Kelić-Heil, A., additional, Kiselev, O.A., additional, Klenze, P., additional, Körper, D., additional, Kröll, T., additional, Litvinov, Yu.A., additional, Löher, B., additional, Martorana, N.S., additional, Morfouace, P., additional, Murillo-Morales, S., additional, Nociforo, C., additional, Obertelli, A., additional, Paschalis, S., additional, Perea, A., additional, Petri, M., additional, Pietri, S., additional, Pirrone, S., additional, Ponnath, L., additional, Rhee, H.B., additional, Rose, L., additional, Russotto, P., additional, Savran, D., additional, Scheit, H., additional, Simon, H., additional, Simon, J.P., additional, Stott, A.M., additional, Sun, Y., additional, Symochko, D., additional, Sürder, C., additional, Taieb, J., additional, Taniuchi, R., additional, Tengblad, O., additional, Velardita, S., additional, and Wamers, F., additional

Published
2024
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12. Study of scintillation properties and performance of CsI(Tl) detectors over time

Author

García-Jiménez, G., primary, Cabanelas, P., additional, González-Caamaño, D., additional, Alvarez-Pol, H., additional, Vicente-Pardal, M.A., additional, Benlliure, J., additional, Cederkäll, J., additional, Cortina-Gil, D., additional, Feijoo-Fontán, M., additional, Graña-González, A., additional, and Rodríguez-Sánchez, J.L., additional

Published
2023
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14. List of contributors

Author

Anwar, Usama Bilal, primary, Benyahia, Brahim, additional, Bernini, Roberta, additional, Boyarov, Arthur D., additional, Brumano, Larissa Pereira, additional, Caetano, B.A., additional, Coppola, R., additional, Cruz, J.M., additional, da Cruz, A.G., additional, De Feo, V., additional, de Souza, Ana Olívia, additional, d’Acierno, A., additional, Esti, Marco, additional, Fernández-Cabezón, Lorena, additional, Fratianni, F., additional, Henrique, C., additional, Kircher, Manfred, additional, Liburdi, Katia, additional, Luz, D., additional, Marques-Porto, Rafael, additional, Mitsunari, T., additional, Moldes, A., additional, Munhoz, D.D., additional, Nazzaro, F., additional, Neves, Guilherme Tonial, additional, Nikel, Pablo I., additional, Osmakova, Alina, additional, Pessoa, Adalberto, additional, Piazza, R.M.F., additional, Rincón-Fontán, M., additional, Rodrigues, Alexandre Gomes, additional, Rodríguez-López, L., additional, Santi, Celso, additional, Santos da Silva, Francisco Vitor, additional, Vecino, X., additional, Ward, Valerie C.A., additional, and Zwar, Ingrid Padovese, additional

Published
2020
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16. WASA-FRS Experiments in FAIR Phase-0 at GSI

Author

Tanaka, Y.K., primary, Achenbach, P., additional, Alibrahim Alfaki, H., additional, Amjad, F., additional, Armstrong, M., additional, Behr, K.-H., additional, Benlliure, J., additional, Brencic, Z., additional, Dickel, T., additional, Drozd, V., additional, Dubey, S., additional, Ekawa, H., additional, Escrig, S., additional, Feijoo-Fontán, M., additional, Fujioka, H., additional, Gao, Y., additional, Geissel, H., additional, Goldenbaum, F., additional, Graña González, A., additional, Haettner, E., additional, Harakeh, M.N., additional, He, Y., additional, Heggen, H., additional, Hornung, C., additional, Hubbard, N., additional, Itahashi, K., additional, Iwasaki, M., additional, Kalantar-Nayestanaki, N., additional, Kasagi, A., additional, Kavatsyuk, M., additional, Kazantseva, E., additional, Khreptak, A., additional, Kindler, B., additional, Knoebel, R., additional, Kollmus, H., additional, Kostyleva, D., additional, Kraft-Bermuth, S., additional, Kurz, N., additional, Liu, E., additional, Lommel, B., additional, Metag, V., additional, Minami, S., additional, Morrissey, D.J., additional, Moskal, P., additional, Mukha, I., additional, Muneem, A., additional, Nakagawa, M., additional, Nakazawa, K., additional, Nociforo, C., additional, Ong, H.J., additional, Pietri, S., additional, Pochodzalla, J., additional, Purushothaman, S., additional, Rappold, C., additional, Rocco, E., additional, Rodríguez-Sánchez, J.L., additional, Roy, P., additional, Ruber, R., additional, Saito, T.R., additional, Schadmand, S., additional, Scheidenberger, C., additional, Schwarz, P., additional, Sekiya, R., additional, Serdyuk, V., additional, Skurzok, M., additional, Streicher, B., additional, Suzuki, K., additional, Szczepanczyk, B., additional, Tang, X., additional, Tortorelli, N., additional, Vencelj, M., additional, Wang, H., additional, Weber, T., additional, Weick, H., additional, Will, M., additional, Wimmer, K., additional, Yamamoto, A., additional, Yanai, A., additional, Yoshida, J., additional, and Zhao, J., additional

Published
2023
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30. Association of a single nucleotide polymorphism combination pattern of the Klotho gene with non-cardiovascular death in patients with chronic kidney disease

Author

Cambray S., Bermudez-Lopez M., Bozic M., Valdivielso J.M., Castro E., María V., Molí T., Vidal T., Soria M., Aladrén Regidor Ma.J., Almirall J., Ponz E., Arteaga Coloma J., Bajo Rubio Ma.A., Belart Rodríguez M., Gascón A., Bover Sanjuan J., Puigvert F., Bronsoms Artero J., Cabezuelo Romero J.B., Muray Cases S., Calviño Varela J., Caro Acevedo P., Carreras Bassa J., Cases Amenós A., Massó Jiménez E., Moreno López R., Cigarrán Guldris S., López Prieto S., Comas Mongay L., Comerma I., Compte Jové Ma.T., Cuberes Izquierdo M., de Álvaro F., Hevia Ojanguren C., de Arriba de la Fuente G., del Pino y Pino Ma.D., Diaz-Tejeiro Izquierdo R., Hormigos A., Dotori M., Duarte V., Estupiñan Torres S., Fernández Reyes Ma.J., Fernández Rodríguez Ma.L., Fernández G., Galán Serrano A., García Cantón C., García Herrera A.L., García Mena M., Gil Sacaluga L., Aguilar M., Górriz J.L., Huarte Loza E., Lerma J.L., Liebana Cañada A., Marín Álvarez J.P., Martín Alemany N., Martín García J., Martínez Castelao A., Martínez Villaescusa M., Martínez I., Moina Eguren I., Moreno Los Huertos S., Mouzo Mirco R., Munar Vila A., Muñoz Díaz A.B., Navarro González J.F., Nieto J., Carreño A., Novoa Fernández E., Ortiz A., Fernandez B., Paraíso V., Pérez Fontán M., Peris Domingo A., Piñera Haces C., Prados Garrido Ma.D., Prieto Velasco M., Puig Marí C., Rivera Gorrín M., Rubio E., Ruiz P., Salgueira Lazo M., Martínez Puerto A.I., Sánchez Tomero J.A., Sánchez J.E., Sans Lorman R., Saracho R., Sarrias M., Serón D., Soler M.J., Barrios C., Sousa F., Toran D., Tornero Molina F., Usón Carrasco J.J., Valera Cortes I., Vilaprinyo del Perugia Ma.M., Ruiz V., Pallarés V., Altozano C.S., Ródenas M.A., Sanitaria de Arán I.G.G.Á.B., Gil F.A., Criado E.G., Belinchón R.D., Fernández Toro J.Ma., and Antonio J.

Subjects
cardiovascular risk, genetic association, adult, genotype, allele, chronic kidney failure, cohort analysis, major clinical study, Klotho protein, Article, homozygote, aged, cause of death, female, multicenter study, male, priority journal, cardiovascular mortality, single nucleotide polymorphism, follow up, human, prospective study
Abstract

Background. Chronic kidney disease (CKD) is associated with an elevated risk of all-cause mortality, with cardiovascular death being extensively investigated. However, non-cardiovascular mortality represents the biggest percentage, showing an evident increase in recent years. Klotho is a gene highly expressed in the kidney, with a clear influence on lifespan. Low levels of Klotho have been linked to CKD progression and adverse outcomes. Single nucleotide polymorphisms (SNPs) of the Klotho gene have been associated with several diseases, but studies investigating the association of Klotho SNPs with noncardiovascular death in CKD populations are lacking. Methods. The main aim of this study was to assess whether 11 Klotho SNPs were associated with non-cardiovascular death in a subpopulation of the National Observatory of Atherosclerosis in Nephrology (NEFRONA) study (n ¼ 2185 CKD patients). Results. After 48 months of follow-up, 62 cardiovascular deaths and 108 non-cardiovascular deaths were recorded. We identified a high non-cardiovascular death risk combination of SNPs corresponding to individuals carrying the most frequent allele (G) at rs562020, the rare allele (C) at rs2283368 and homozygotes for the rare allele (G) at rs2320762 (rs562020 GG/AG þ rs2283368 CC/CT þ rs2320762 GG). Among the patients with the three SNPs genotyped (n ¼ 1016), 75 (7.4%) showed this combination. Furthermore, 95 (9.3%) patients showed a low-risk combination carrying all the opposite genotypes (rs562020 AA þ rs2283368 TT þ rs2320762 GT/TT). All the other combinations [n ¼ 846 (83.3%)] were considered as normal risk. Using competing risk regression analysis, we confirmed that the proposed combinations are independently associated with a higher fhazard ratio [HR] 3.28 [confidence interval (CI) 1.51-7.12]g and lower [HR 6 × 10-6 (95% CI 3.3 × 10-7-1.1 × 10-5)] risk of suffering a non-cardiovascular death in the CKD population of the NEFRONA cohort compared with patients with the normal-risk combination. Conclusions. Determination of three SNPs of the Klotho gene could help in the prediction of non-cardiovascular death in CKD. © The Author(s) 2020. Published by Oxford University Press on behalf of ERA-EDTA. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

Published
2020
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34. Potential applications of biosurfactant extract obtained from corn steep liquor in hair formulations

Author

Rincón-Fontán, M., Rodríguez-López, L., Vecino, X., Cruz, J. M., Moldes, A. B., and Universidade do Minho

Subjects
integumentary system, otorhinolaryngologic diseases, sense organs
Abstract

[Excerpt] Biosurfactants (BS) have great advantages as an eco-friendly alternative to synthetic surfactants used in hair formulations. Human hair contains fatty acids (palmitic, palmitoleic, oleic and stearic acid) that prevent hair dryness and avoid the lower scalp hair density. These fatty acids are included in the composition of biosurfactant extract obtained from corn steep liquor (CSL) (Vecino et al., 2015). The adsorption of surfactants on hair depends on its ionic charge. Normally, hair surface has a negative charge, so it adsorbs cationic surfactants. For this reason, hair conditioners and also hair sunscreens contain cationic surfactants, mainly quaternary ammonium salts, which absorb UV light, protecting hair surface from dryness and oxidation. Contrarily, shampoo formulations are composed by anionic surface-active agents, which can induce, in many cases, hair protein loss, hair dryness, opacity and difficulty of handling. In order to know if biosurfactant extract, obtained from CSL, could be adsorbed on hair, its ionic behavior was evaluated by using anionic and cationic resins using a solid/liquid ratio of 1:10 at room temperature. After that, adsorption experiments using human hair were established at room temperature with hair/biosurfactant solution ratio of 1:50. [...], The financial support from the Spanish Ministry of Economy and Competitiveness (FEDER funds under the project CTM2015-68904) and L. Rodríguez-López is grateful for her predoctoral fellowship supported by the University of Vigo (Spain).

Published
2016

35. Adsorption capacity evaluation of a lipopeptide biosurfactant on human hair

Author

Rincón-Fontán, M., Rodríguez-López, L., Vecino, Xanel, Cruz, J. M., Moldes, A. B., and Universidade do Minho

Subjects
food and beverages
Abstract

[Excerpt] Nowadays, surfactants are used in a wide variety of applications in several fields, such as cosmetic and health care, environmental issues and, generally, as detergents. They present valuable characteristics since they can decrease water surface tension and solubilize molecules that cannot be eliminated in an aqueous media in normal conditions. Due to their surface active nature, synthetic surfactants can result toxic in the media in which they are applied. These drawbacks can be overcome by using biosurfactants, since they result environmentally friendly because of their biodegradability and low toxicity. Therefore, it would be interesting to replace synthetic detergents by biosurfactants in cosmetic and personal care formulations. From this point of view, Vecino et al., [1] have extracted biosurfactants from an industrial stream of corn wet milling industry, consisting of a lipopeptide that could have important applications in the formulation of natural shampoos. This biosurfactant is able to reduce the surface tension of water in more than 30 units. Thus, the aim of this work was to study the adsorption of this biosurfactant in human hair. [...], Spanish Ministry of Economy and Competitiveness (FEDER funds under the project CTM2015-68904, University of Vigo (Spain)

Published
2016

36. Characterization of ionic nature of biosurfactant extracted from corn steep liquor using ionic exchange resins

Author

Rodríguez-López, L., Rincón-Fontán, M., Vecino, Xanel, Cruz, J. M., Moldes, A. B., and Universidade do Minho

Abstract

[Excerpt] Resins have been used for years for the purification and characterization of ionic substances. The use of these resins allows not only remove impurities or increase the concentration of metabolites from industrial streams, but also allows define their ionic structure. In general, surfactants can be classified as non-ionic, anionic, cationic or amphoteric, what is going to define their future application at industrial scale. For example, anionic surfactants present the greatest wetting and emulsifying properties, while cationic ones have excellent antibacterial properties as well as good emulsifier capacities. Otherwise, amphoteric surfactants, which may have anionic or cationic properties depending on pH, are widely used in personal care products because of their less irritability to skin and eyes in comparison with other types of surfactants. [...], Spanish Ministry of Economy and Competitiveness (FEDER funds under the project CTM2015-68904), University of Vigo (Spain)

Published
2016

38. Influence of micelle formation on the adsorption capacity of a biosurfactant extracted from corn on dyed hair

Author

Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials, Rincón Fontán, M., Rodriguez López, L., Vecino Bello, Xanel, Cruz, J. M., Moldes, A., Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials, Rincón Fontán, M., Rodriguez López, L., Vecino Bello, Xanel, Cruz, J. M., and Moldes, A.

Abstract

Human hair contains fatty acids (palmitic, palmitoleic, oleic and stearic acid) that prevent hair dryness and avoid lower hair density of the scalp that can be caused when hair is dyed. These acids are also present in the composition of the amphoteric biosurfactant obtained from corn steep liquor, an agro-industrial stream generated by the corn wet-milling industry. This biosurfactant has a molecular weight of 1542 Da, with a similar mass spectrum to that of Fengycin, a biosurfactant produced by Bacillus subtilis strains. Few studies exist in the literature on the interaction of hair and biosurfactants, nor are there studies on the influence of micelle formation on biosurfactant adsorption capacity. Moreover, this is supposedly the first work in which a biosurfactant is applied to dyed hair. Different concentrations of biosurfactant were applied to dyed hair between 20–50 °C during 2–30 min of treatment. Theoretical models were obtained, which allowed the prediction of the amount of biosurfactant that can be entrapped by dyed hair. A maximum capacity of 10 549 µg g-1 was achieved at 295 mg L-1 of biosurfactant, thus it could be observed that dyed hair mainly adsorbed the biosurfactant above its critical micellar concentration, at which point the biosurfactant is in micellar form. Furthermore, this treatment maintains the dyed hair structure in a good state., Peer Reviewed, Postprint (published version)

Published
2017

41. Ionic behavior assessment of surface-active compounds from corn steep liquor by exchange resins

Author

Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials, Rodriguez López, L., Rincón Fontán, M., Vecino Bello, Xanel, Cruz, J. M., Moldes, A., Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials, Rodriguez López, L., Rincón Fontán, M., Vecino Bello, Xanel, Cruz, J. M., and Moldes, A.

Abstract

Depending on their ionic nature, biosurfactants can be classified as nonionic, anionic, cationic, or amphoteric. The ionic behavior of biosurfactants is an important characteristic that dictates their use in industrial applications. In this work, a biosurfactant extract obtained from corn steep liquor was subjected to anionic or cationic resins, in order to study the ionic behavior under different operational conditions using response surface methodology. The independent variables included in the study are the dilution of biosurfactant solution, the amount of cationic or anionic resin, and the extraction time, whereas the dependent variables studied consisted of the surface tension of biosurfactant aqueous solution, after contacting with anionic or cationic resin. The results showed that biosurfactant extracted from corn steep liquor is amphoteric, since both resins were able to entrap this biosurfactant, making it particularly suited for use in personal care preparations for sensitive skin., Peer Reviewed, Postprint (author's final draft)

Published
2016

50. Caso 19

Author

Bermejo Espinosa, N., primary, Isusi Fontán, M., additional, and Diez Renovales, F., additional

Published
2010
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