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Bioactive and antioxidant characteristics of blackberry cultivars from East Anatolia
(2016) Gündoğdu, Müttalip; Kan, Tuncay; Canan, İhsan
Abstract: Blackberry is commonly used both in the fresh and the processing market. In the present study antioxidant capacity, organic acids, phenolic compounds, vitamin C, and sugars content of blackberry cultivars grown in the east of Turkey were determined. Phenolic compounds, organic acids, vitamin C, and sugars were determined by HPLC. Antioxidant capacity was determined by spectrophotometric methods. The cultivar Cherokee had the highest antioxidant capacity (48.900 μmol TE g–1), and the cultivar Jumbo had the lowest antioxidant capacity (30.855 μmol TE g–1). It was determined that the chief phenolic compounds in blackberry cultivars were catechin (ranging from 111.599 to 438.970 mg 100 g–1), followed by ellagic acid (ranging from 10.610 to 51.506 mg 100 g–1). Looking at the content of organic acids, citric acid and malic acid came to the fore, ranging from 3.182 to 7.131 g kg–1 and 1.349 to 2.881g kg–1, respectively. Fructose content of the studied cultivars was higher than the glucose and sucrose contents. Results indicate that blackberry cultivars with higher antioxidant capacity and biochemical content may be valuable for nutritional breeding efforts.
Bioactive contents and some horticultural characteristics of local apple genotypes from Turkey
(Pakistan Agricultural Scientists Forum, 2018) Gündoğdu, Müttalip; Canan, İhsan; Okatan, Volkan
Some horticultural characteristics and bioactive contents of some local apple genotypes grown in Bolu province located in western black sea region were investigated. Along with the horticultural characteristics (fruit weight, width etc.), the phenolic spectrum and organic acids as bioactive content were determined. Among major phenolic compounds, catechin, chlorgenic acid, gallic acid, phloridzin and rutine content varied between 10.84- 5.16 mg 100 ml(-1); 25.16-7.17 mg 100 ml(-1); 7.35- 1.42 mg 100 ml(-1); 6.12-1.18 mg 100 ml(-1) and 5.16-1.01 mg 100 ml(-1), respectively. The dominant organic acids were malic acid and fumaric acid among the organic acids. When the apple genotypes were evaluated overall in terms of horticultural properties and bioctive contents; it is suggested that 14BL02, 14BL09, 14BL06 and 14BL01 genotypes displayed superior properties and they may create a significant genetic resource to be use them in breeding activities in apple in future.
Biochemical characterisation and sensory evaluation of differently coloured and shaped tomato cultivars
(Univ Agr Sci & Veterinary Med Cluj-Napoca, 2019) Oluk, Aylin Celile; Ata, Atilla; Ünlü, Mustafa; Yazıcı, Ebru; Karaşahin, Zafer; Eroğlu, Evren Cağlar; Canan, İhsan
Antioxidant capacity, total phenolic content, colour, sugar, volatiles, ascorbic acid and carotenoid (beta-carotene and lycopene) contents of differently coloured and shaped tomato cultivars (cvs) grown in the Eastern Mediterranean region, Turkey were determined, along with a sensory evaluation. Tomato cultivars of two different types (cherry and beefsteak) and four different colours (red, yellow, orange and brown) were analysed. All plants were simultaneously grown in the same field and subjected to identical horticultural practices to minimise the effects of environmental conditions and to maximise those related to genotype. The red cherry cultivar had the highest lycopene content, while the orange beefsteak cultivar had the highest beta-carotene content. The highest antioxidant capacity, total phenolic content and hardness scores were found in cherry-type tomatoes, except the yellow one. The red cherry cultivar had the highest sugar content. Red and brown cherry cultivars were also significant in terms of their high carotenoid and sugar contents, along with a high antioxidant activity. The brown cherry cultivar had the highest total phenol content. The highest quantities of 2-hexenal, 3-hexen-1-ol, and 6-methyl-5-hepten-2-one were detected in red cultivars. The brown cherry cultivar had the highest sweetness, typical aroma and hardness scores, while the yellow beefsteak cultivars the lowest sweetness typical aroma scores. In terms of sensory parameters, red and brown cultivars scored higher than yellow and orange ones.
Biochemical characteristics of sweet cherry germplasm in Turkey
(Mattioli 1885, 2019) Canan, İhsan; Gündoğdu, Muttalip; Ercişli, Sezai; Berk, Selma Kuru; Saraçoğlu, Onur
In this study, phenolic compounds, organic acids, sugars, vitamin C and total antioxidant activities of national (0900 Ziraat, Malatya Dalbasti and Sari Kiraz) and universal (Merton Late, Vista, Bing and Lambert) sweet cherry cultivars and one genotype (1355) were investigated. We determined fourteen phenolic compounds, five organic acids and three sugars in sweet cherry fruit. In general, gallic, vanilic and ellagic acid were major phenolic compounds in fruit of sweet cherry cultivars and genotype. The genotype1355 had more phenolic compounds compared to cultivars. It was determined that malic acid was frequently determined among the fruit of investigated cultivars and genotype. It was observed the highest sugar content was measured in 1355 genotype and 0900 Ziraat cultivar. Total antioxidant capacity was the highest (9.22 mu mol TE g(-1)) in fruit of cultivar 0900 Ziraat. Overall the genotype 1355 found the most promising due to having favorable properties and could be recommended for farmers and consumers.
Determination of antioxidant, total phenolic, total carotenoid, lycopene, ascorbic acid, and sugar contents of Citrus species and mandarin hybrids
(2016) Canan, İhsan; Gündoğdu, Müttalip; Seday, Übeyit; Oluk, Celile Aylin; Karaşahin, Zafer; Eroğlu, Evren Çağlar; Yazıcı, Ebru; Ünlü, Mustafa
Abstract: This study aimed to determine the antioxidant capacity; the total phenolic, total carotenoid, sugar, and ascorbic acid contents; and some pomological characteristics of Citrus species (Citrus reticulata, Citrus sinensis, and Citrus paradisi) and mandarin (Citrus reticulata) and their new hybrids developed for yield at the Alata Horticultural Research Institute in Mersin, Turkey. With respect to antioxidant capacities, the highest value (45.28 μmol TE/100 g) was determined in Cocktail (Citrus paradisi) cultivar fruits among all examined cultivars and hybrids. We found that 7-19 (Clementine × Kara) mandarin hybrids had the highest total phenolic content (386.81 mg gallic acid equivalent/g) and the highest total carotenoid content (39.03 mg/kg). Considering the sugar contents of mandarin fruits, sucrose was identified to be the predominant sugar and the highest value (8.80 g/100 g) was identified in the Clementine cultivar. It was determined that the Citrus species and mandarin hybrids had lycopene contents ranging from 6.52 to 1.68 mg/kg. Overall, this study provides supporting evidence for the superiority of Cocktail fruit as an excellent source of antioxidant capacities.
Determination of effect of gibberellic acid treatments on the fruit quality of strawberry cv. Seascape
(2017) Gündoğdu, Müttalip; Berk, Selma Kuru; Canan, İhsan; Koçoğlu, Selma Tuna; Çelik, Ferit; Taş, Akgül
In the study, the effect of gibberellic acid treatments on fruit quality of strawberry cv. Seascape grown in Bolu ecological conditions was examined. The fruit quality parameters were identified under the application of two concentration of GA3 (50 ppm and 100 ppm). It was determined that the values of SSC, pH, TA and fruit hardness were not statistically affected by both GA3 applications. The highest values related fruit weight and size were obtained at 50 ppm GA3 application. The SCC and firmness values were determined as 6.67 brix° and 1.31 kg/cm2 in 100 ppm concentration, respectively. The fruits treated with 50 ppm GA3 had lower pH than those treated 100 ppm GA3 and control. In addition, the highest fruit weight (46.01 g) and fruit acidity (1.11%) were obtained at the application of 50 ppm GA3. It was also found that the GA3 application did not cause a significant change in the flavor, taste and juice values.
Determination of phenolic compounds, antioxidant capacity and organic acids contents of Prunus domestica L., Prunus cerasifera Ehrh. and Prunus spinosa L. Fruits by HPLC
(Akademiai Kiado Rt, 2017) Çelik, Ferit; Gündoğdu, Müttalip; Alp, Şevket; Muradoğlu, Ferhad; Ercişli, Sezai; Canan, İhsan
The important role of fruits in human health and nutrition has been better understood with the recent studies on biochemical contents of fruits having antioxidant properties. Being one of the similar studies, in this study, total antioxidant capacity (TAC), phenolic compound, organic acid, and vitamin C contents of three plum species (Prunus domestica L., Prunus cerasifera Ehrh., and Prunus spinosa L.) grown in Van locality (Turkey) were identified, and the correlation between the measured values was investigated. Phenolic compound, organic acid, and vitamin C contents were determined by high-performance liquid chromatography (HPLC) method. Analysis of phenolic compound indicated that chlorogenic acid was the predominant phenolic compound, and the highest value was measured in P. spinosa L. as 12.985 mg kg(-1). Malic acid was the predominant organic acids and the highest value was measured in P. spinosa L. as 1.245 g 100 g(-1). The highest TAC and vitamin C contents were also measured in P. spinosa L. as 1.021 mmol TE kg(-1) and 25.492 mg 100 g(-1), respectively. P. spinosa L. was found to be superior to the other two species with respect to antioxidant capacity and other biochemical contents. A significant (P <= 0.01) and positive correlation was reported between antioxidant capacity and vitamin C content.
Diversity in phenolic compounds, biochemical and pomological characteristics of Arbutus unedo fruits
(Polish Soc Horticultural Sci, 2018) Gündoğdu, Müttalip; Ercişli, Sezai; Canan, İhsan; Orman, Erdal; Sameeullah, Muhammad
Strawberry trees (Arbutus unedo L.) are naturally grown in particular Black Sea and Mediterranean regions of Turkey with great diversity due to continuous seed propagation for centuries. The trees differ in terms of most of the horticultural characteristics. We investigated the phenolic compounds and the biochemical and pomological characteristics of the fruits of eight strawberry tree selections naturally grown in the western part of Turkey. Significant differences were found among the genotypes in terms of their phenolic compounds and their biochemical and pomological characteristics. Among soluble sugars, fructose (11.63 g 100 g(-1)) was the dominant sugar, followed by glucose (6.10 g 100 g(-1)) and sucrose (1.44 g 100 g(-1)) for all the genotypes. Positive correlation was found between fruit weight and soluble sugar content. Malic acid was the major organic acid (0.67-2.33 g 100 g(-1)), and the second major organic acid in strawberry tree fruits was citric acid (0.25-0.87 g 100 g(-1)). Vitamin C content was an average of 56.22 g 100 g(-1) for the eight genotypes. Among phenolic compounds, gallic acid was dominant (1.62-7.29 mg 100 g(-1)), followed by chlorogenic acid (1.23-3.14 mg 100 g(-1)), on an average basis.
Diversity on color and phenolic compounds in apricot fruits
(Springer, 2017) Gündoğdu, Müttalip; Ercişli, Sezai; Berk, Selma; Kan, Tuncay; Canan, İhsan
Turkey dominate world apricot production for a long time sharing 23% of world fresh apricot production and the country also realizes 82% of the total dried apricot trade of the world. In this study, phenolic compounds and fruit skin color in eight apricot cultivars grown in Malatya province of Turkey and correlations between phenolic compounds and fruit skin color were determined. Among apricot cultivars, 'Wilson Delicious' was the most orange-colored fruit skin color. Pyrogallol and rutin were found to be predominant phenolic compounds for all cultivars. Pearson correlation coefficients between pyrogallol, catechol, chlorogenic acid, caffeic acid, epigallocatechin and b color values were found statistically significant (P < 0.01). 'Harcot' cultivar came into prominence because of high pyrogallol (1596.26 mu g g(-1)), catechol (119.89 mu g g(-1)), chlorogenic acid (281.44 mu g g(-1)), caffeic acid (167.86 mu g g(-1)) and epigallocatechin (132.46 mu g g(-1)) levels. Overall 'Ordubat' cultivar had the lowest phenolic compounds. Among the yellow-colored cultivars, 'Harcot' and 'Wilson Delicious' had the richest phenolic compounds among yellow and orange-colored cultivars, respectively.
Effect of methyl jasmonate application on bioactive contents and agro-morphological properties of strawberry fruits
(Univ Life Sciences Lublin, 2020) Gündoğdu, Müttalip; Berk, Selma Kuru; Yıldız, Kenan; Canan, İhsan; Ercişli, Sezai; Tuna, Selma
In this study, methyl jasmonate were applied to strawberry cultivars, and the pomological and biochemical characteristics of the fruits were investigated. The highest increase in fruit weight was determined in the Honeoye cultivar and it was detected in the application of 0.50 mM MeJa according to the control group. When the organic acid contents of fruits were examined, it was determined that the dominant acid was citric acid and the maximum range (Control: 1.49 g kg(-1); 0.50 mM MeJa: 16.49 g kg(-1)) was in the Seascape cultivar. When the ellagic acid content of the fruits was examined, the highest increase (Control: 13.350 mg 100 g(-1), 0.25 mM MeJa: 22.768 mg 100 g(-1)) was found in the Sweet Ann cultivar. In this study, it was determined that appropriate concentrations of MeJa should be preferred in cultivation of strawberry and these concentrations affected the fruit quality parameters.
Farklı depo koşullarında muhafaza edilen kütdiken limon (citrus lemon l.) çeşidinde bazı kalite kriterlerinin dönemsel değişimi
(2015) Canan, İhsan; Ağar, Tayfun; Gündoğdu, Müttalip
Bu araştırma Kütdiken limon (Citrus lemon L.) çeşidinin farklı depo koşullarında muhafaza edilerek dönemsel bazı kalite kriterlerindeki değişimlerin belirlenmesi amacıyla yapılmıştır. Limonun üretim yerine 30-70 km mesafede bulunan yaylalarda açılan obruklarda yapılan doğal soğutmalı depolarda limon depolanmasının artırılması için bu depoların sıcaklık ve nem durumları ile farklı depoların, muhafaza sürelerinin ve depolara meyveleri taşıma zamanlarının meyvelerin ağırlık, çürüme kayıpları ile diğer kalite kriterlerine etkisi incelenmiştir. Bu amaçla Mersin İlinde depoculuğun geliştiği 3 yayla ile Ortahisar'da bir depo ve Alata'da (Erdemli/Mersin) bir makineli soğuk hava deposu karşılaştırılmıştır. Çalışma sonucunda yayla limon depolarının ağırlık ve çürüme kayıpları ile diğer kalite kriterleri açısından meyveleri Ortahisar depoları ile aynı kalitede muhafaza edebildiği görülmüştür. Tüm depolarda Aralık ayında derim yapıldıktan hemen sonra depolara limon taşıma uygulamasının ağırlık ve çürüme kayıplarını azalttığı ve diğer kalite kriterlerini iyileştirdiği tespit edilmiştir. Aralık ayında götürülen limonlarda çürüme kaybı yarı yarıya azalmıştır. Ortahisar depolarında yüksek nem vardır ve çürüme kayıplarını azaltmak için havalandırma yapılması zorunludur. Yayla depolarında yaz aylarında depo içi sıcaklıklar artmaktadır. Bu aylarda serinletme gereklidir. Aralık ayında limon taşımak için tüm depolarda depo içi sıcaklıklar düşüktür ve termostatlar kontrolünde gerektiğinde ısıtma yapmak gerekmektedir. Tüm depolarda havalandırma sorunu vardır ve havalandırma en iyi olacak şekilde tedbirler alınmalıdır.
Incorporation of ascorbic acid in chitosan-based edible coating improves postharvest quality and storability of strawberry fruits
(ELSEVIER, 2021) Saleem, Muhammad Shahzad; Anjum, Muhammad Akbar; Naz, Safina; Ali, Sajid; Hussain, Sajjad; Canan, İhsan
Recent postharvest studies have shown that adding an antioxidative agent in a polysaccharide-based edible coating reduces postharvest losses and extends the shelf life of a coated fruit. Therefore, the effect of addition of ascorbic acid (AA, 1%) in chitosan-based coating (CH, 1%) on strawberry fruits under cold storage conditions at 4 +/- 1 degrees C and 85 +/- 5% RH was investigated for 15 days. It was observed that addition of AA in CH coating reduced weight loss, decay percentage, malondialdehyde content and hydrogen peroxide compared to CH alone. The combined CH + AA application also suppressed fruit softening by reducing cell wall degrading enzymes (i.e. polygalacturonase, cellulase and pectin methyl esterase) activities. In addition, AA incorporation catalyzed ROS scavenging enzymes (i.e. ascorbate peroxidase, catalase, peroxidase and superoxide dismutase) activities. CH + AA treatment also maintained fruit quality by conserving higher total soluble solids, titratable acidity, ascorbic acid content, total phenolics and antioxidant activity. Sensory quality (color, taste, glossiness and overall acceptability) of fruits coated with CH + AA treatment was also stable during storage. Conclusively, the combined CH + AA application is an effective approach to maintain the postharvest quality of strawberry fruits under cold storage.
Influence of foliar application with gibberellic acid on phenolic and bioactive compounds of strawberry fruits
(Springer, 2021) Gündoğdu, Müttalip; Berk, Selma; Yıldız, Kenan; Kaki, Barış; Tuna, Selma; Canan, İhsan; Okatan, Volkan
In present study, effects of foliar GA3 treatments on phenolic compounds, organic acids, vitamin C content and agro-morphological characteristics of 5 strawberry cultivars were investigated. Principle component analysis was also performed to assess the variations in and relationships between bioactive compounds contents of cultivars treated with GA(3). Although they varied depending on cultivars, the highest organic acid contents were generally determined in fruits treated with 50 ppm GA3. Both GA(3) treatments increased vitamin C contents in 'Albion' and 'Aromas' but decreased in 'Seascape' fruits. GA treatment caused significant change in some phenolic compounds content. While 100 ppm GA(3) treatment significantly increased catechin content of 'Albion' and 'Aromas', it decreased catechin content of 'Seascape' fruits. Results of PCA analysis showed that 'Sweet Ann' differ from other cultivars by poor ascorbic and fumaric acid content. 'Albion' and 'Honeoye' differ from other cultivars by high p-coumaric and low ellagic acid contents.
MARDİN BÖLGESİNDE YETİŞTİRİLEN NAR (Punica granatum L.) GENOTİPLERİNE AİT MEYVELERİN BESİN ELEMENTLERİ İÇERİKLERİNİN BELİRLENMESİ
(2017) Gündoğdu, Müttalip; Geçer, Mustafa Kenan; Aşıcı, Akif; Canan, İhsan
Bu çalışma; Mardin bölgesinde yetiştirilen nar (Punica granatum L.) genotiplerine ait meyvelerin makro ve mikro besin elementleri içerikleri arasındaki korelasyonun belirlenmesi amacıyla yapılmıştır. Çalışmada nar genotiplerine ait meyve sularının fosfor içerikleri 329.123-943.684 ppm, potasyum içerikleri 93.375-985.600 ppm, kalsiyum içerikleri 63.477-142.703 ppm arasında değiştiği belirlenmiştir. Araştırmada demir içerikleri 1.337-41.741 ppm, mangan içerikleri 0.281-3.346 ppm, çinko içerikleri 0.050-0.223 ppm, bakır içerikleri 0.253-2.388 ppm ve magnezyum içerikleri 38.672-92.948 ppm arasında değiştiği saptanmıştır. İncelenen 21 nar genotipine ait meyvelerin makro ve mikro besin elementleri içeriklerinin dağılım sıralamasının P?K?Ca?Mg?Fe?Mn?Cu? Zn şeklinde gerçekleştiği tespit edilmiştir
Morphological and biochemical differences among wild, semi-wild and cultivated sour cherries from Turkey
(Publ House Bulgarian Acad Sci, 2019) Canan, İhsan
Sour cherries (Prunus cerasus L.) are in general used for fruit based processed food manufacturing industry (jam, juice, syrup, etc.). It has also been used commonly in frozen fruit industry recently. The aim of this study is to evaluate the morphological and biochemical characteristics of wild, semi-wild sour cherry genotypes and cultivated sour cherry 'Kutahya' grown in Coruh valley in Turkey. The morphological data included harvest dates, fruit shape, fruit weight, fruit external colour, juice colour and aroma. Along with morphological characteristics, biochemical properties of fruits juices such as soluble solid content, total acidity, vitamin C, total phenolics, total anthocyanins and antioxidant capacity were also determined. According to results, harvest date was June 20 and July 7 among wild, semi-wild genotypes and cv. Kutahya. Fruit weights were found between 1.38-1.96 g among wild genotypes, 2.12-3.11 g among semi-wild genotypes and 4.11 g in cv. Kutahya. Total phenolic and antioxidant capacity were found the highest in fruits of wild genotypes, and followed by semi-wild genotypes compared to cv. Kutahya.
Phenolic compounds, bioactive content and antioxidant capacity of the fruits of mulberry (Morus spp.) germplasm in Turkey
(Polish Soc Horticultural Sci, 2017) Gündoğdu, Müttalip; Canan, İhsan; Geçer, Mustafa Kenan; Kan, Tuncay; Ercişli, Sezai
The study was carried out in 2014 and 2015, and aimed to determine some important biochemical and antioxidant characteristics of the fruits of mulberry (Morus spp.) cultivars and genotypes found in Malatya (Turkey). Phenolic compounds (protocatechuic acid, vanillic acid, ellagic acid, rutin, quercetin, gallic acid, catechin, chlorogenic acid, caffeic acid, syringic acid, p-coumaric acid, o-coumaric acid, phloridzin and ferulic acid), organic acids, sugars, vitamin C and antioxidant capacity were analyzed in sampled fruits. The results showed that most of the biochemical content and antioxidant capacities of the cultivars and genotypes were significantly different from one another (p < 0.05). Among the phenolic compounds, rutin (118.23 mg 100 g(-1)), gallic acid (36.85 mg 100 g(-1)), and chlorogenic acid (92.07 mg 100 g(-1)) were determined to have the highest values for most of the fruit samples. Malic acid and citric acid were dominant among the organic acids for all the cultivars and genotypes except 44-Nrk-05. Glucose was measured as a more abundant sugar than fructose and sucrose in all samples. Antioxidant capacity, on the other hand, varied between 6.17 and 21.13 mu mol TE g(-1) among the cultivars and genotypes analyzed.
Postharvest application of gum arabic edible coating delays ripening and maintains quality of persimmon fruits during storage
(Wiley, 2020) Saleem, Muhammad Shahzad; Ejaz, Shaghef; Anjum, Muhammad Akbar; Nawaz, Aamir; Naz, Safina; Hussain, Sajjad; Ali, Sajid; Canan, İhsan
Hydrocolloid gums are extensively used in food industry. Recently, hydrocolloid gums such as gum arabic have been widely researched as edible coatings to extend postharvest life of fruits and vegetables. Therefore, in this study, the efficacy of gum arabic (GA)-based edible coating was investigated for maintaining quality of persimmon fruits during ambient storage. Persimmon fruits were coated with 0 and 10% GA and stored at 20 +/- 1 degrees C and 80 +/- 2% RH for 20 days. The 10% GA-coated fruits showed significantly lower weight loss, membrane leakage, H2O2, and malondialdehyde content than control. GA application suppressed increase in activities of polygalacturonase, pectin methylesterase, and cellulase enzymes. GA-coated fruits exhibited substantially higher superoxide dismutase, peroxidase, ascorbate peroxidase, and catalase activities. Moreover, coated persimmons showed markedly higher total phenolics, ascorbic acid, antioxidant activity, and titratable acidity, but reduced total carotenoids, total soluble solids, and ripening index throughout the storage. Practical applications Postharvest losses cause wastage of 40%-50% of globally produced fruits and vegetables. Among many postharvest procedures, such as irradiation, chemical treatment, heat treatment, controlled atmosphere storage; modified atmosphere packaging, etc., application of edible coating is one of the methods that reduce the spoilage of fresh fruits and vegetables. In this study, gum arabic (GA), which is already being used in processed food industry, has shown the potential to reduce fresh food losses in persimmons, a perishable climacteric fruit. GA coating extended the storage life of persimmons while maintaining quality attributes of the fruits. Using the finding of this study, application of GA-based edible coating to persimmons stored at ambient conditions can prevent spoilage of persimmons, save energy bills of storing persimmons at low temperatures, and increase marketing window for the fruit.
SEKONDER METEBOLİT İÇERİĞİ BAKIMINDAN CEVİZİN ÖNEMİ
(2017) Gündoğdu, Müttalip; Karadeniz, Turan; Canan, İhsan; Güler, Emrah; Berk, Selma Kuru
Kullanım alanı geniş olan cevizin kültür tarihi çok eskilere dayanmakta olup biyokimyasal içeriği bakımından insan beslenmesinde vazgeçilmez meyve türleri arasında yerini almıştır. Özellikle son yıllarda yapılan araştırmalarda fitoaleksin, allelopati, antioksidant, antikanser, antimutagen ve anti bakteriyel gibi özelliklere sahip metebolitlerin içeriği bakımından cevizin önem arz ettiği ortaya konulmuştur. Sekonder metabolitler içersinde sınıflandırılan ve meyve türlerinde yoğun olarak bulunan maddelerin başında fenolik bileşikler yer almaktadır. Bu bileşikler özellikle cevizin kabuğunda yoğun bir şekilde olup fizyolojik olarak meyve kalitesini pomolojik ve biyokimyasal olarak etkilemektedir. Flavonoidler yoğun olarak ceviz yaprağında yer almaktadır. p-Kumarik asit, o-kumarik asit, vanilik ve klorojenik asit gibi fenolik bileşikler yaprak ve meyvede bulunan bitkinin savunma sistemini oluşturan sekonder metabolitler arasında yer almaktadır. Ceviz meyvesi, yaprağı ve diğer organlarının içerdiği biyoaktif içerikler sayesinde yaygın kullanım alanı olan ve özellikle sağlık sektöründe etkin olarak tüketilen bir meyve türüdür
Starks Gold kiraz (Prunus Avium L.) çeşidinin hasat sonrası kalitesi üzerine UV-C, ultrason ve modifiye atmosfer paket uygulamalarının etkisi
(2019) Coşar, İrem; Canan, İhsan
Bu çalışma Starks Gold kiraz çeşidinin hasat sonrası kalitesi üzerine UV-C, Ultrason ve modifiye atmosfer paket (MAP) uygulamalarının etkilerini belirlemek için yürütülmüştür. Bu amaçla meyvelere UV-C (15 W, 10 dk), Ultrason (35 kHz, 10 dk, 20 °C) ve MAP uygulanmıştır. Uygulama sonrası meyveler depoya (0 °C, %85-90 nem) alınmış ve 4, 8, 12 ve 16. gündeki kalite değişimleri incelenmiştir. Deneme süresince %1.15 (4. Gün MAP) ile %10.54 (16.gün, Kontrol) arasında ağırlık kaybı, %3.63 (4. gün, MAP) - % 3.98 (16. gün, Kontrol) titre edilebilir asitlik, %15.73 (12. gün, MAP) - %18.47 (4. gün, MAP) suda çözünür kuru madde miktarı, %14.81 (4. gün, Kontrol) - %47.28 (16. gün, MAP) arasında hasat sonrası kayıplar tespit edilmiştir. Deneme süresince yapılan renk ölçümlerinde 40.83 (4.gün, MAP) ile 57.37 (12.gün UV-C) arasında L* değeri, 10.21 (12. gün, UV-C) - 26.49 (8. Gün, UV-C) a değeri, 12.39 (4.gün, MAP) - 25.13 (12. Gün, UV-C) b değeri, 20.85 (4. gün, UV-C) - 31.07 (8.gün, UV-C) Kroma değeri, 31.18 (8.gün, UV-C) ile 67.50 (12. Gün, UV-C) arasında hue değerleri tespit edilmiştir. Bu çalışmada; Starks Gold çeşidinin hasat sonrası kalitesinin korunması için MAP, UV-C ve Ultrason uygulamalarının tek başına yetersiz olduğu görülmüş, uygulamalardan biri tercih edilmek istenirse MAP’ ın kullanılabileceği belirlenmiştir. Farklı çalışmalarla konunun detaylandırılmasına ihtiyaç duyulmaktadır.
SULTANİ ÇEKİRDEKSİZ ÜZÜM ÇEŞİDİNİN RAF ÖMRÜ ÜZERİNE UV-C, ULTRASON VE MAP UYGULAMALARININ ETKİSİNİN BELİRLENMESİ
(2020) Güler, Emrah; Canan, İhsan; Gündoğdu, Müttalip; Karadeniz, Turan
Üzüm hem taze hem de kuru tüketilebilen, suyundan ve meyve etinden pek çok ikincil ürünün yapıldığı ve dünyada üretimi en çok yapılan meyvelerden biridir. Türkiye’de de en çok üretilen meyve konumundadır. Ülkemizde üretilen üzümlerin büyük çoğunluğunu Sultani Çekirdeksiz üzüm çeşidi oluşturmaktadır. Bu çalışma Sultani Çekirdeksiz üzüm çeşidinin oda koşullarında muhafaza olanaklarının belirlenmesi amacıyla yürütülmüştür. Çalışma bölünen bölünmüş parseller deneme desenine göre kurulmuş olup 4 farklı uygulama (Kontrol, UV-C, Ultrason ve MAP) ve 3 farklı zaman (3 gün, 6 gün, 9 gün) denenmiştir. Çalışma bulgularına göre, MAP uygulamasının ağırlık kaybı bakımından diğer uygulamalara nazaran daha başarılı olduğu görülmüştür (%2.99). Ağırlık kayıpları zamana göre değerlendirildiğinde ise tüm uygulamalar için artan bekleme süreleri ağırlık kayıplarını da istatistiki olarak artırmıştır. Uygulamaların renk değerleri üzerine etkisi kısıtlı görülürken, zamanlar arasında renk değerleri bakımından istatistiki farklılıklar oluşmuştur (p>0.05). Bu araştırma sonucunda Sultani Çekirdeksiz üzüm çeşidinin muhafazasında MAP uygulamasının diğer uygulamalara nazaran öne çıktığı görülmüştür.

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