Short Term Creatine Loading Without Weight Gain Improves Sprint, Agility and Leg Strength Performance in Female Futsal Players

Summary Objectives Futsal game requires players to perform frequent bouts of high-intensity activity with limited rest periods that are not sufficient for full recovery. Therefore, creatine supplementation may enhance performance by improving recovery rate. Along with this, the number of studies conducted to determine the effects of creatine on performance in the females is scarce. Thus, the main aim of this study is to identify the effects of short-term (7/day) creatine supplementation on leg strength, velocity and agility in young female futsal players. Equipment and methods A total of thirty of young female futsal players (aged: 19.83±1.13 years) participated in the study which was designed as randomized and double-blind, on a voluntary basis. Participants were randomly assigned either to creatine (n=15) or placebo (n=15) group. Over 7 days, creatine group received 0.25g/kg/day micronized pure creatine monohydrate (Creapure, Hardline Nutrition, Kavi Gıda Istanbul, Turkey) and placebo group did not take any supplements, apart from maltodextrin (Fantomalt, Nutricia, United Kingdom). Before and after 7 days of loading creatine supplementation, body weight, leg strength, velocity and agility performance of the participants were determined. The data obtained were analysed with ANCOVA statistical model. Results Creatine supplementation significantly improved 10m, 20m and 30m speed performances (P0.05). The data obtained provide that 7 days low dose creatine supplementation may be an effective approach for improving exercise capacity in female futsal players without an associated increase in body weight. Résumé Objectifs Le jeu de futsal exige que les joueurs effectuent de fréquentes périodes d’activité de haute intensité avec des périodes de repos limitées qui ne sont pas suffisantes pour une récupération complète. Par conséquent, la supplémentation en créatine peut améliorer les performances en améliorant le taux de récupération. Parallèlement à cela, le nombre d’études menées pour déterminer les effets de la créatine sur la performance chez les femmes est rare. Ainsi, le but principal de cette étude est d’identifier les effets de la supplémentation en créatine à court terme (7/jour) sur puissance des jambes, la vélocité et l’agilité chez les jeunes joueuses de futsal féminines. Équipement et méthodes Au total, une trentaine de jeunes joueuses de futsal (âgées de 19,83±1,13 ans) ont participé à l’étude, conçue comme une étude randomisée et en double insu, sur base volontaire. Les participants ont été assignés au hasard soit au groupe créatine (n=15) ou au groupe Placebo (n=15). Sur 7jours, le groupe créatine a reçu 0,25g/kg/jour de monohydrate de créatine pure micronisée (Creapure, Hardline Nutrition, Kavi Gida Istanbul, Turquie) et le groupe placebo n’a pas pris de suppléments hormis la maltodextrine (Fantomalt, Nutricia, Royaume-Uni). Avant et après 7jours de chargement de supplémentation en créatine, le poids corporel, la force des jambes, la vélocité et l’agilité des participants ont été déterminés. Les données obtenues ont été analysées avec le modèle statistique ANCOVA. Résultats La supplémentation en créatine a significativement amélioré les performances en vitesse de 10m, 20m et 30m (p<0,05), la force des jambes (p<0,05) et l’agilité (p<0,05) chez les joueuses de futsal. Cependant, en fonction de la charge en créatine, aucun changement significatif du poids corporel n’a été observé (p<0,05). Les données obtenues indiquent qu’une supplémentation en créatine à faible dose de 7jours peut être une approche efficace pour améliorer la capacité d’exercice chez les joueuses féminines de futsal sans augmentation associée du poids corporel

[Proceedings of the 4th International Workshop of the Lower Cretaceous Cephalopod Team (IGCP-Project 362) / Peter F. Rawson and Philip J. Hoedemaeker (editors)]: Report on the 4th international workshop of the Lower Cretaceous Cephalopod Team (IGCP-Project 362)

The Working Group proposes only one modification to its current zonation of the Mediterranean Region, the addition of a cristatum Subzone in the lower part of the inflatum Zone (upper Albian). But in the light of newly published research it highlights levels/areas where further work is required, especially to resolve conflicting zonal schemes. It also proposes a 'Tethyan Province' zonation for the middle Albian. Alternative correlations for the Boreal/Tethyan Valanginian to Barremian stages are tabulated, one based on ammonite evidence alone, the other with additional biostratigraphical data coupled with sequence stratigraphy and magnetostratigraphy

Determination and validation of Henry's constant for ozone in phosphate buffers using different analytical methodologies

Different procedures for measuring the concentration of ozone in aqueous buffered solutions have been reviewed for the determination of Henry s constant at different temperatures and pH. Iodometry, indigo trisulfonate and iron (II) chemical methods were compared with the direct UV absorbance measurement of ozone at 258 nm. From these data a new value for the molar extinction coefficient of ozone is proposed as 3840 ± 109 M^(-)1 cm^(-1). After the verification of the ozone analysis methods, the solubility of ozone in phosphate buffer medium was studied with in-situ absorbance direct measurements in a device with high gas-liquid transference rate, minimizing the gas desorption process on sample manipulation. The decomposition of ozone was not detected at the experimental conditions tested and, consequently, the observed solubility of ozone is constant, with the pH ranging from 2 to 7.6. The solubility of ozone was measured between 5 and 35ºC, resulting in a dimensionless solubility ratio of HB0 = 1.797 exp[0.0277·t(ºC)].J.F. acknowledges the support of the doctoral fellowship from the Universitat Politecnica de Valencia (UPV-PAID-FPI-2010-04).Ferre Aracil, J.; Cardona, SC.; Navarro-Laboulais, J. (2015). Determination and validation of Henry's constant for ozone in phosphate buffers using different analytical methodologies. Ozone: Science and Engineering. 37(2):106-118. https://doi.org/10.1080/01919512.2014.927323S10611837

Report of the 1st International Workshop of the IUGS Lower Cretaceous Ammonite Working Group

The Lower Cretaceous Ammonite Working Group forms part of the IUGS Subcommission on Cretaceous Stratigraphy (Peter Rawson, chair) and is the successor of the Lower Cretaceous Cephalopod Team that formed part of IGCP Projects 262 and 362 respectively. The latter team had organized five Workshops (Klein & Hoedemaeker, 1999;Hoedemaeker & Rawson, 2000) and this is the first workshop under the new IUGS umbrella, which was organized by Stéphane Reboulet (Université de Lyon 1) directly after the 3rd French Symposium on Stratigraphy (Lyon, 8–10 July 2002). The workshop was attended by 18 members from 13 countries. The attendants agreed to call the group the ‘Kilian Group' after the famous French palaeontologist W. Kilian.Fil: Hoedemaeker, Philip J.. National Museum of Natural History; Países BajosFil: Reboulet, Stéphane. Universite´ Claude Bernard Lyon 1; FranciaFil: Aguirre-Urreta, Maria Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Alsen, Peter. Universidad de Copenhagen; DinamarcaFil: Aoutem, Mohamed. Université d’Agadir Faculté des Sciences; MarruecosFil: Atrops, François. Universite´ Claude Bernard Lyon 1; FranciaFil: Barragan, Ricardo. Universidad Nacional Autónoma de México; MéxicoFil: González Arreola, Celestina. Universidad Nacional Autónoma de México; MéxicoFil: Klein, Jaap. No especifica;Fil: Lukeneder, Alexander. Universidad de Viena; AustriaFil: Ploch, Isabela. Polish Geological Institute; PoloniaFil: Raisossadat, Seyed Naser. Colegio Universitario de Londres; Reino UnidoFil: Rawson, Peter F.. University Of Birjand; IránFil: Ropolo, Pierre. No especifica;Fil: Vasícek, Zdenek. VSB Inst. Geological Engineering; República ChecaFil: Vermeulen, Jean. No especifica;Fil: Wippich, Max G.E.. Ruhr Universität Bochum; Alemani