1405-0471 1405-0471 S1405-04712018000100207 10.21829/myb.2018.2411485 Costa Rica Costa Rica 00 00 2018 00 00 2018 24 1

2016 90 4 4 659-74 2014 2 8 8 7-13 American Society for Testing and Materials 2014 American Society for Testing and Materials 2014 b 2009 90 7 7 1762-72 2014 21 42 42 45-55 2003 12 6 6 1451-60 2003 4 5 5 571-80 2004 197 1 1 285-94 2013 40 4 4 732-46 2016 6 2 2 23-7 2013 41 100 100 549-56 2011 189 1 1 259-71 2014 3 2 2 287-301 2014 20 1 1 11-20 2008 2014 140 1 1 70-5 2014 33 148-56 2014 34 2 2 443-54 2014 6 1-7 2014 23 10 10 2543-58 2015 12 1 1 63-73 2008 65 6 6 612-21 2010 22 3 3 317-28 2014 48 2 2 411-33 2002 50 1 1 21-9 2004 192 2 2 217-27 2008 59 277-86 2016 210 1 1 25-37 2014 101 5 5 764-77 2003 26 1 1 19-27 2013 47 45-55 2014 88 6 6 1001-19 2016 37 1 1 71-84 2014 44 5 5 817-21 2015 2008 20 1 1 38-47 2014 5 24 24 26-39