VPDBVienna PeeDee Belemnite
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[delta][sup.13]C [delta][sup.15]N Periodo ([por millar] VPDB) ([por millar] AIR) Formativo -15,1[+ o -]1,97 17,5[+ o -]3,09 Medio -11,6[+ o -]0,86 19,2[+ o -]4,27 Intermedio-Tardio -12,4[+ o -]1,97 18,0[+ o -]3,59 Tardio -11,5[+ o -]0,80 23,8[+ o -]1,21 Tabla 3.
The [delta][sup.18]O values are reported relative to VPDB, with a mean reported standard deviation of 0.3[per thousand].
The delta values were converted from VPDB to VSMOW standard according to the method of Friedman and O'Neil [6].
Results for [delta][sup.13]C and [delta][sup.15] were expressed as parts per thousand (%) differences from the standard (5): Vienna Pee Dee Belemnite (vPDB) for [delta][sup.13]C, and atmospheric [N.sub.2] for [delta][sup.15]N.
[C.sub.3] plants have a typical isotopic range of values between -25[per thousand] and -35[per thousand] with an average around -27 [+ or -] 2%; hence, in every 1,000 atoms there are 27 fewer [sup.13]C atoms than in the international standard Vienna Pee Dee Belemnite (VPDB).
The company's ESP Sensorlytics Plus, which is a full pump predictive-maintenance system will be available on the new Novatec Silencer and VPDB positive-displacement vacuum pumps.
All the isotope ratio measurements were reported in the standard 5 notation (%): [[delta].sup.18]O={[([sup.18]O/[sup.16]O)A/ ([sup.18]O/16O)S]-1} x 1000, for instance, where A is otolith aragonite sample and S is an international standard (VPDB, Vienna Peedee belemnite).
The samples from the Nilawahan section provided with the d13C values varied between 1.34 to -1.56 (VPDB) and values of d18O fluctuated between -4.47 to -6.59 (VPDB).
where R represent the atomic [sup.15]N/[sup.14]N or [sup.13]C/[sup.12]C ratio in the sample and standard atmospheric [N.sub.2] for nitrogen and VPDB for carbon, respectively.
Los resultados son presentados en la notacion delta per mil ([delta]%) con respecto al estandar Vienna Pee Dee Belenmite (VPDB).
[[delta].sup.13]C values were measured relative to the VPDB standard and have errors of [+ or -] 0.2%c.