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Pollen Viability and Germination Levels with Amount of Pollen Production of Some Important Olive Cultivars in Türkiye 全文
2023
Cansu Dölek Gencer | Mücahit Taha Özkaya | Sinan Eti | Şenay Karabıyık | Neslihan Taskin Madrigal Fletcher
Pollen Viability and Germination Levels with Amount of Pollen Production of Some Important Olive Cultivars in Türkiye 全文
2023
Cansu Dölek Gencer | Mücahit Taha Özkaya | Sinan Eti | Şenay Karabıyık | Neslihan Taskin Madrigal Fletcher
This research was carried out to determine the pollination abilities of Domat, Gemlik and Sarı Ulak olive cultivars. Pollen viability rate, germination rate and amount of pollen production were examined during the periods when 25%, 50% and 75% of the flowers were opened. According to the results obtained from three years’ experimental study, the highest percentages of pollen viability were found in Gemlik (81.51%) and Domat (81.50%), whereas Sarı Ulak cultivar (77.41%) showed the lowest viability. In pollen germination percentages, the highest values on the basis of cultivars were determined 59.85% (Domat), 59.74% (Gemlik) and 52.12% (Sarı Ulak). The highest amount of pollen production in a flower was found in the Sarı Ulak cultivar (329,046) while it was followed by Domat (319,693) and Gemlik (306,385). Despite the high pollen production in Sarı Ulak cultivar, the pollen viability and germination rates were found to be low. In Gemlik and Domat cultivars, all values were obtained relatively near. In addition, it had been noted that the values related to pollen viability, germination and production amount were higher during 50% and 75% flowering periods than 25%.
显示更多 [+] 显示较少 [-]Extraction of Anthocyanins and Total Phenolic Compounds from Açai (Euterpe oleracea Mart.) Using an Experimental Design Methodology. Part 3: Microwave-Assisted Extraction 全文
2020
Aliaño-González, María José | Ferreiro-González, Marta | Espada-Bellido, Estrella | Carrera, Ceferino | Palma Vargas, Miguel Ricardo | Ayuso, Jesús | Barbero, Gerardo F. | Alvarez, José A.
In this work, two methods based on microwave-assisted extraction techniques for the extraction of both anthocyanins and total phenolic compounds from açai have been developed. For that, a full factorial design (Box-Behnken design) has been used to optimize the following four variables: solvent composition (25–75% methanol in water), temperature (50–100 °C), pH (2–7), and sample/solvent ratio (0.5 g: 10 mL–0.5 g: 20 mL). The anthocyanins and total phenolic compounds content have been determined by ultra high-pressure liquid chromatography and Folin-Ciocalteu method, respectively. The optimum conditions for the extraction of anthocyanins were 38% MeOH in water, 99.63 °C, pH 3.00, at 0.5 g: 10 mL of ratio, while for the extraction of total phenolic compounds they were 74.16% MeOH in water, 99.14 °C, pH 5.46, at 0.5 g: 20 mL of ratio. Both methods have shown a high repeatability and intermediate precision with a relative standard deviation lower than 5%. Furthermore, an extraction kinetics study was carried out using extraction periods ranging from 2 min until 25 min. The optimized methods have been applied to açai-containing real samples. The results with such real samples have confirmed that both methods are suitable for a rapid and reliable extraction of anthocyanins and total phenolic compounds.
显示更多 [+] 显示较少 [-]Extraction of Anthocyanins and Total Phenolic Compounds from Açai (Euterpe oleracea Mart.) Using an Experimental Design Methodology. Part 3: Microwave-Assisted Extraction 全文
2020
Aliaño González, María José | Ferreiro González, Marta | Espada Bellido, Estrella | Carrera Fernández, Ceferino Adrián | Palma Lovillo, Miguel | Ayuso Vilacides, Jesús | Fernández Barbero, Gerardo | Álvarez Saura, José Ángel | Química Analítica | Química Física
In this work, two methods based on microwave-assisted extraction techniques for the extraction of both anthocyanins and total phenolic compounds from acai have been developed. For that, a full factorial design (Box-Behnken design) has been used to optimize the following four variables: solvent composition (25-75% methanol in water), temperature (50-100 degrees C), pH (2-7), and sample/solvent ratio (0.5 g: 10 mL-0.5 g: 20 mL). The anthocyanins and total phenolic compounds content have been determined by ultra high-pressure liquid chromatography and Folin-Ciocalteu method, respectively. The optimum conditions for the extraction of anthocyanins were 38% MeOH in water, 99.63 degrees C, pH 3.00, at 0.5 g: 10 mL of ratio, while for the extraction of total phenolic compounds they were 74.16% MeOH in water, 99.14 degrees C, pH 5.46, at 0.5 g: 20 mL of ratio. Both methods have shown a high repeatability and intermediate precision with a relative standard deviation lower than 5%. Furthermore, an extraction kinetics study was carried out using extraction periods ranging from 2 min until 25 min. The optimized methods have been applied to acai-containing real samples. The results with such real samples have confirmed that both methods are suitable for a rapid and reliable extraction of anthocyanins and total phenolic compounds.
显示更多 [+] 显示较少 [-]Pollen Viability and Germination Levels with Amount of Pollen Production of Some Important Olive Cultivars in Türkiye 全文
2023
Cansu Dölek Gencer | Mücahit Taha Özkaya | Sinan Eti | Şenay Karabıyık | Neslihan Taskin Madrigal Fletcher
This research was carried out to determine the pollination abilities of Domat, Gemlik and Sarı Ulak olive cultivars. Pollen viability rate, germination rate and amount of pollen production were examined during the periods when 25%, 50% and 75% of the flowers were opened. According to the results obtained from three years’ experimental study, the highest percentages of pollen viability were found in Gemlik (81.51%) and Domat (81.50%), whereas Sarı Ulak cultivar (77.41%) showed the lowest viability. In pollen germination percentages, the highest values on the basis of cultivars were determined 59.85% (Domat), 59.74% (Gemlik) and 52.12% (Sarı Ulak). The highest amount of pollen production in a flower was found in the Sarı Ulak cultivar (329,046) while it was followed by Domat (319,693) and Gemlik (306,385). Despite the high pollen production in Sarı Ulak cultivar, the pollen viability and germination rates were found to be low. In Gemlik and Domat cultivars, all values were obtained relatively near. In addition, it had been noted that the values related to pollen viability, germination and production amount were higher during 50% and 75% flowering periods than 25%.
显示更多 [+] 显示较少 [-]Physicochemical and Melissopalynological Study of Some Honey Samples from the Algerian East Region 全文
2023
Louiza Ketfi | Radia Draiaia | Asma Necib | Nadia Mohamadi
The quantitative and qualitative analysis of honey components is the object of this study. These analyses are considered a physicochemical and melissopalynological tool that allows the study of some characteristics of honey. The analysis of ten (10) samples of Algerian honey is carried out to determine the pH, water content, electrical conductivity, ash content, acidity, hydroxymethylfurfural content, proteins, and sugar content. According to the obtained results, the physico-chemical parameters of the studied honeys comply with the European and international standards. The pollen spectrum indicated the presence of 23 plant families, mainly Fabaceae, encompassing a total of 65 honey species visited by foragers. Of the 10 honeys sampled and analyzed, six were monofloral, with the remainder showing no apparent dominance of any honey type. The most frequent plant species were eucalyptus (Eucalyptus sp.), Italian sainfoin (Hedysarum coronarium), and chickweed (Lathyrus sp.). Furthermore, the results obtained indicate that all honey (monofloral and polyfloral) showed a high degree of variability in the number of pollen grains.
显示更多 [+] 显示较少 [-]Biologic Activities of Honeybee Products Obtained From Different Phytogeographical Regions of Turkey 全文
2014
Hamide Doğan | Ethem Akyol | Hasan Akgül | Zeliha Selamoğlu Talas
Honeybee products are rich in phenolic compounds, which effect as natural antioxidants. These compounds may be attached as indicators in studies into the floral and geographical origin of the natural bee products. In this study, we aimed to determine average total antioxidant capacity, average total oxidant capacity and average oxidative stress index of natural bee products obtained from different regions of Turkey. Collected honeybee samples were kept at +4o C until extracted. Natural bee products were extracted with specific methods and antioxidant capacities were defined with in vitro analyses and data were compared. As a result, the highest average total antioxidant capacities were observed in propolis and pollen samples. Total antioxidant capacities of honeybee products collected from various regions demonstrated differences (P
显示更多 [+] 显示较少 [-]Biologic Activities of Honeybee Products Obtained From Different Phytogeographical Regions of Turkey 全文
2014
Hamide Doğan | Ethem Akyol | Hasan Akgül | Zeliha Selamoğlu Talas
Honeybee products are rich in phenolic compounds, which effect as natural antioxidants. These compounds may be attached as indicators in studies into the floral and geographical origin of the natural bee products. In this study, we aimed to determine average total antioxidant capacity, average total oxidant capacity and average oxidative stress index of natural bee products obtained from different regions of Turkey. Collected honeybee samples were kept at +4o C until extracted. Natural bee products were extracted with specific methods and antioxidant capacities were defined with in vitro analyses and data were compared. As a result, the highest average total antioxidant capacities were observed in propolis and pollen samples. Total antioxidant capacities of honeybee products collected from various regions demonstrated differences (P
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