<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Anderson, D. M.</style></author><author><style face="normal" font="default" size="100%">Danielson, T.L.</style></author><author><style face="normal" font="default" size="100%">Obeidat, S.M.</style></author><author><style face="normal" font="default" size="100%">Rayson, G.D.</style></author><author><style face="normal" font="default" size="100%">Estell, R. E.</style></author><author><style face="normal" font="default" size="100%">Bai, B.</style></author><author><style face="normal" font="default" size="100%">Fredrickson, E. L.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Differentiating among plant spectra by combining pH dependent photoluminescence spectroscopy with multi-way principal component analysis (MPCA)</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">JRN</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">bibliography/11-005.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">5</style></volume><pages><style face="normal" font="default" size="100%">1-9</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Photoluminescence spectroscopic probes offer the potential for real-time measurements of animal diet composition. Spectral emission signatures (excitation at 365 nm) from three different pH (2.2, 7.5 and 12.5) phosphate buffered saline (PBS) extracts from two grasses, Sporobolus flexuosus (Thurb. ex Vasey) Rydb., [mesa dropseed], and Pleuraphis mutica  Buckley [tobosa], two forbs, Dimorphocarpa wislizenii (Engelm.) Rollins [spectacle pod], and Sphaeralcea incana Torrey [pale globemallow], and leaves and twigs from two shrubs Flourensia cernua DC. [tarbush], and Atriplex canescens (Pursh) Nutt., [fourwing saltbush] were examined. Since pH has been shown to be pivotal in affecting extraction efficiency of other plant compounds pH seemed appropriate as an additional dimension within our multi-way principal component analysis (MPCA) to differentiate among six different plant species. In particular, MPCA allowed differentiation between Sporobolus and Pleuraphis that was not possible using only principal component analysis (PCA).  This research suggests MPCA may be a more appropriate tool than PCA when attempting to discriminate among plant species.</style></abstract><accession-num><style face="normal" font="default" size="100%">LTER.2011-90029</style></accession-num></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Obeidat, S.M.</style></author><author><style face="normal" font="default" size="100%">Rayson, G.D.</style></author><author><style face="normal" font="default" size="100%">Anderson, D. M.</style></author><author><style face="normal" font="default" size="100%">Landau, S.Y.</style></author><author><style face="normal" font="default" size="100%">Glasser, T.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Application of multi-way data analysis on excitation-emission spectra for plant identification</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">JRN</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">bibliography/07-007.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">72</style></volume><pages><style face="normal" font="default" size="100%">682-690</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The ability to distinguish among diets fed to Damascus goats using excitation-emission luminescence spectra was investigated. These diets consisted of Medicago sativa L. (Alfalfa), Trifolium spp (Clover), Pistacia lentiscus (P.lentiscus), Phyllirea latifolia (P.latifolia), and Pinus brutia (P. brutia).  The three dimensional luminescence response surface from phosphate buffered saline extracts of each material was analyzed using muti-way analysis chemometric tools (MPCA) and parallel factor analysis (PARAFAC). Using three principle components, the spectra from each diet component was distinguished. Additionally, fecal samples from goats fed diets of either alfalfa or clover hays were investigated. The application of MPCA and PARAFAC to these samples using models derived from the pre-digested diet materials was strongly suggestive of the utility of similarly derive training samples for the elucidation of botanical diet composition for animals.</style></abstract><accession-num><style face="normal" font="default" size="100%">LTER.2007-90424</style></accession-num></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Anderson, D. M.</style></author><author><style face="normal" font="default" size="100%">Rayson, G.D.</style></author><author><style face="normal" font="default" size="100%">Obeidat, S.M.</style></author><author><style face="normal" font="default" size="100%">Ralphs, M.H.</style></author><author><style face="normal" font="default" size="100%">Estell, R. E.</style></author><author><style face="normal" font="default" size="100%">Fredrickson, E. L.</style></author><author><style face="normal" font="default" size="100%">Parker, E.</style></author><author><style face="normal" font="default" size="100%">Gray, P.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Use of fluorometry to differentiate among clipped species in the Genera, &lt;i&gt;Astragalus, Oxytropis &lt;/i&gt;and &lt;i&gt;Pleuraphis&lt;/i&gt;</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">JRN</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.srmjournals.org/archive/1551-5028/59/5/pdf/i1551-5028-59-5-557.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">59</style></volume><pages><style face="normal" font="default" size="100%">557-563</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">A rapid and reproducible method to determine botanical composition of forage is an ecological and economic goal for range animal ecologists. Multidimensional fluorometry previously demonstrated the possibility of a unique optical approach for accurately determining species composition of pre- and post-digested plant materials.  Fluorometry may be used to detect toxic plants in standing crop as well as diets by using electronic transitions in chemical structures at wavelengths between 370 and 580 nm.  Grass hay (genus Pleuraphis) and six clipped forbs (four species of Astragalus and two species of Oxytropis) were examined. The resulting spectral signatures were evaluated for differences in the blue and green regions of the visible spectrum using Principle Component Analysis (PCA).  This represents the first published data using chemometrics to differentiate among fluorophores from these plant extracts.  It was possible to distinguish between the grass and forbs and among forbs.  Further research will be required to evaluate these same plant species in mixed diets and fecal samples.</style></abstract><accession-num><style face="normal" font="default" size="100%">LTER.2006-90458</style></accession-num></record></records></xml>