Search results for "MANOVA"

showing 2 items of 2 documents

Suitability of Phytosterols Alongside Fatty Acids as Chemotaxonomic Biomarkers for Phytoplankton

2016

The composition and abundance of phytoplankton is an important factor defining ecological status of marine and freshwater ecosystems. Chemotaxonomic markers (e.g., pigments and fatty acids) are needed for monitoring changes in a phytoplankton community and to know the nutritional quality of seston for herbivorous zooplankton. Here we investigated the suitability of sterols along with fatty acids as chemotaxonomic markers using multivariate statistics, by analyzing the sterol and fatty acid composition of 10 different phytoplankton classes including altogether 37 strains isolated from freshwater lakes. We were able to detect a total of 47 fatty acids and 29 sterols in our phytoplankton sampl…

LAKES0106 biological sciencesDINOFLAGELLATEta1172ChlorophyceaePlant Sciencelcsh:Plant culturelevätlipiditbiomolekyylit010603 evolutionary biology01 natural sciencesbiomolecules4-METHYL STEROLSlipidsAlgaeMIXING MODELPhytoplanktonBotanylcsh:SB1-111014. Life underwaterfreshwater1183 Plant biology microbiology virologyOriginal Researchchemistry.chemical_classificationalgaebiologySTEROL COMPOSITIONSTRAINS010604 marine biology & hydrobiologyfungita1183DinoflagellateCYANOBACTERIAbiology.organism_classification6. Clean waterSterolDAPHNIA-MAGNAPERMANOVAchemotaxonomychemistryChemotaxonomyGROWTHGREEN-ALGAElipids (amino acids peptides and proteins)PERMDISPDinophyceaePolyunsaturated fatty acidFrontiers in Plant Science
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Klasiskas un robustas MANOVA analīzes metodes

2019

Daudzdimensiju dispersiju analīze (MANOVA) tiek pielietota situācijās, kad tiek mērīti vairāki mainīgie katrai eksperimentālai vienībai. Darbā aplūkota teorija par klasisko MANOVA metodi un robusto MANOVA metodi, to pieņēmumiem un pielietojumiem. Bieži datos tiek novēroti izlēcēji, kuri atšķiras no pārējiem datiem. Analizējot datus, šie izlēcēji var būtiski ietekmēt parametru novērtējumus, šādās situācijās ieteicams izmantot robustas statistikas metodes. Tika secināts, ka robustā MANOVA metode ne vienmēr dod precīzākus rezultātus par klasisko MANOVA metodi. Atslēgas vārdi: Daudzdimensiju analīze, MANOVA, robusta MANOVA, Vilksa Lambda statistika

MatemātikaDaudzdimensiju analīzerobusta MANOVAVilksa Lambda statistikaMANOVA
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