Yazar "Turkmen, Musa" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    Combining non-destructive devices and multivariate analysis as a tool to quantify the fatty acid profiles of linseed genotypes
    (Elsevier, 2025) Arslan, Aysel; Aygun, Yusuf Ziya; Turkmen, Musa; Celiktas, Nafiz; Mert, Mehmet
    Linseed (Linum usitatissimum L.) and linseed oil, with a fatty acid profile rich in both macro and micro elements, are recognized as functional foods due to their valuable positive effects on health. Fatty acids composition (FAC) is a key indicator in assessing the quality of linseeds. The FAC of linseed is typically determined using chromatographic methods, yielding highly accurate results. However, chromatographic methods entail drawbacks such as requiring pre-chemical processes, generating chemical waste, and being both expensive and timeconsuming, similar to chemical analyses. This study focused on the feasibility of colorimeter and FT-NIRS data to determine the FAC (%), protein (%) and neutral detergent fiber (NDF %) in linseed samples. By employing the PLSR analysis based on FT-NIRS, it was determined that the ratios of stearic (R2val = 0.74, RMSEP = 0.09 %), oleic (R2val = 0.75, RMSEP = 0.26 %), linoleic (R2val = 0.85, RMSEP = 0.58 %), linolenic (R2val = 0.71, RMSEP = 1.07 %), 8,11,14 eicosatrienoic (R2 val = 0.77, RMSEP = 0.02 %), margaric (R2 val = 0.71, RMSEP = 0.01 %), myristic (R2val = 0.75, RMSEP = 0.02 %), and behenic (R2val = 0.74, RMSEP = 1.12 %) in linseed could be successfully predicted. Furthermore, results demonstrated that the protein (R2val = 0.87, RMSEP = 0.9 %) and NDF (R2val = 0.90, RMSEP = 0.6 %) content in linseeds can be successfully predicted. PLSR has demonstrated that FT-NIRS has relatively higher predictive capability compared to color models.
  • Küçük Resim Yok
    Öğe
    Determining the critical period for weed control in summer savory (Satureja hortensis L.): A comparative study across two locations
    (Taylor & Francis Ltd, 2025) Karaman, Yucel; Ozlem Tursun, Ayse; Turkmen, Musa; Tursun, Nihat
    Summer savory (Satureja hortensis L.) is an important medicinal and aromatic plant valued for its essential oil content and its use in the food, pharmaceutical and cosmetics industries. Weed competition is one of the major challenges in the cultivation of this plant. The aim of this study was to determine the critical period for weed control (CPWC) and to evaluate the impact of weed competition on yield and essential oil composition in two different locations (A and B). The dominant weed species were Tribulus terrestris, Amaranthus retroflexus, Xanthium strumarium, Portulaca oleracea and Sorghum halepense. The highest values for yield parameters including essential oil yield, fresh and dry biomass, dry leaf yield and plant height were recorded in the weed-free plots, while the lowest values were observed in the continuously weedy plots. Weed interference caused significant yield losses ranging from 51.0% to 78.7% depending on the location. Based on a 5% acceptable yield loss threshold, CPWC ranged from 7 days after sowing to harvest at Location A (106-1237 growing degree days, GDD), and from 10 to 37 days after sowing at Location B (160-759 GDD). Essential oil yield was highest in weed-free plots (41.19-60.27 L ha-1) and lowest in continuously weedy plots (14.01-29.67 L ha-1). The major constituents of the essential oil were carvacrol (32.3-61.5%) and gamma-terpinene (16.4-28.9%), both of which were affected by weed competition. These results demonstrate the importance of early weed control due to the low competitive ability of summer savory to improve both yield and essential oil quality in S. hortensis production.