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Düşük Doz Gama (60Co) Işını Uygulamalarının Kısıtlı Sulama Koşullarında Taze Fasulyenin Erken Fide Gelişimine Etkilerinin Belirlenmesi Full text
2023
Muhsin Yıldız | Çeknas Erdinç | Aytekin Ekincialp
Kuraklık stresi, pek çok kültür bitkisinde olduğu gibi taze fasulye üretimini de sınırlayan başlıca faktörlerden biridir. Son zamanlarda düşük dozda gama ışını uygulamalarının bitki gelişiminin kritik aşamalarında kuraklığın oluşturduğu olumsuz etkinin elemine edilmesinde yardımcı olduğu bazı araştırmacılar tarafından bildirilmiştir. Fakat bu konuda yapılan çalışmalar oldukça sınırlıdır. Bu çalışmada farklı gama ışın dozları (0, 25, 50 ve 100 Gy) uygulanan Gina ve Romano taze fasulye çeşitlerinde kısıtlı sulamanın etkilerinin belirlenmesi amaçlanmıştır. Fideler iklim odası koşullarında 23 ± 2°C sıcaklık ve 16:8 ışık:karanlık periyodunda tam sulama [%100 (I1)] ve kısıtlı sulama [%50 (I2)] olacak şekilde iki farklı sulama seviyesinde yetiştirilmişlerdir. Çalışma sonunda gama ışını dozları ile kısıtlı sulamanın sürgün ve kök boyu, yaprak sayısı, sürgün ve kök yaş-kuru ağırlıkları, kök-sürgün oranı gibi fide gelişim parametrelerinin yanı sıra yaprak oransal su içeriği, fotosentetik pigment içeriği, lipid peroksidasyonu ve sürgün besin elementi içeriklerine etkisi araştırılmıştır. Çalışmada düşük doz gama uygulamasının kısıtlı sulama koşullarında çeşitlere göre farklı sonuçlar verdiği görülmüştür. Gama ışın dozları %50 sulamada Gina çeşidinde kök boyunda önemli bir etki yaratırken, Romano çeşidinde 50 ve 100 Gy dozlarının sürgün boyu ile yaş ve kuru ağırlıklarda önemli bir artış sağlamıştır. MDA içeriği her iki çeşitte de su stresinde 50 ve 100 Gy gama ışını ile birlikte önemli miktarda azalmıştır. Düşük doz gama ışını uygulamasının özellikle Romano çeşidinde daha etkili olduğu ve genel olarak 50 ve 100 Gy gama ışın dozlarının kısıtlı sulamada uygulanabilir dozlar olduğu belirlenmiştir.
Show more [+] Less [-]Pre-Harvest Application of Aminoethoxyvinylglycine, Salicylic Acid and Plant Growth Promoting Rhizobacteria on Fruit Quality of ‘Sweetheart’ Sweet Cherry Full text
2023
Emine Küçüker | Kenan Celik | Ceyda Kızgin Özcengiz | Ferhat Ogurlu | Erdal Aglar
Sweet cherry, which affects consumers’ preferences with its aroma, taste and sensory properties, is a significant fruit species for human health with its bioactive compounds such as organic acids, vitamins and anthocyanins. However, its post-harvest shelf life is very short due to its sensitive fruit structure. Thus, the significant economic losses occur. In the study, effects of pre-harvest Aminoethoxyvinylglycine (AVG), Salicylic acid (SA) and plant growth promoting rhizobacteria (PGPR) applications on fruit quality characteristics and biochemical content in sweet cherry were determined. SA and PGPR treatments increased fruit size, but AVG decreased (If the fruit weight is 4.51 in the control application, 4.49 in the SA application and 4.10 in the PGPR, how can it be said that SA and PGPR increase the fruit weight). The fruits treated with SA, AVG and PGPR had higher fruit firmness values than the control’-fruits. Salisylic acid treatmens did not affect the rate of soluble solids content(SSC) in fruit, SSC rate was higher in PGPR treated-fruit, but AVG decreased the SSC. Titratable acidity (TA) was lower in PGPR treated-fruit, but was higher in the AVG and SA treated-fruit. Fruits treated with the SA and AVG had higher fruit color values than control fruits, while the lowest color values was obtained with PGPR treatment. In general; PGPR, SA and AVG were effective in the concentration of organic acids, but their effects varied depending on the organic acid compounds. As a result, AVG and SA delayed fruit ripening and fruit softening while PGPR, AVG and SA improved fruit quality (It is not clear how this idea was reached). These applications can be considered as a promising method for improving fruit quality at harvest and maintaining post-harvest fruit quality of sweet cherry.
Show more [+] Less [-]Varietal Screening of Radish Genotypes Against Alternaria Leaf Spot (Alternaria raphani) at Western Nepal Full text
2023
Kavita Adhikari | Chiranjivi Sharma | Anju Karki | Isha Budha Magar | Radhika Chand | Sajana Gharti Magar
Paucity of knowledge on resistant variety, high yield loss ranging from 32- 57% and dearth of knowledge on management of Alternaria leaf spot has been the major concerns in radish production in the world. Our study will aid in multiplication and standardization of the germane variety of radish resistant to Alternaria leaf spot disease so as to escalate the production, productivity, and the competitiveness in the domestic as well as in the international market. Hence, this experiment was rendered to screen the radish genotypes against Alternaria leaf spot disease in Western Nepal in 2021. Seven genotypes namely Sparkle white F1 hybrid, Korean cross, Palak-patta 35, Pyuthane red, 40 days, Geeta 33, and Mino early were used as the treatment and experiment was laid out in one factorial RCBD design. Each treatment was assigned with 8 plants for observation with 3 replications per treatment. Parameters like days to appearance of disease, incidence of disease on seedling, disease severity (3 scorings), mean score of disease, mean AUDPC and reaction of genotypes were measured during the experiment. Our study unveiled highly significant result for the days to appearance of disease, disease severity, mean score of disease and AUDPC among the genotypes of radish. Alternaria leaf spot first appeared in Pyuthane red (18.33 days) while appeared late in Mino early. Disease severity was found harsh in 40 days at each scoring (57.33, 64.67 and 70.33 respectively); on the contrary severity was minor in Sparkle white at each scoring (26.67, 35 and 44.17 respectively). Similarly, the highest MDS (3.4) and AUDPC (449.8) was found in 40 days, whereas the lowest MDS (1.7) and AUDPC (246.5) was observed in Sparkle white. Ultimately, it is contended that 40 days was found to be moderately susceptible variety while other varieties were found to be moderately resistant.
Show more [+] Less [-]Fractionation, Phytochemical Screening and Antioxidant Activity of Different Sub-Fractions from Leaves and Flowers of Erica arborea L. Full text
2023
Salima Amari | Karbab Ahlem | Lekhmici Arrar | Charef Noureddine
The purpose of this study was to prepare eight sub-fractions from leaves and flowers of Erica arborea L., characterize their phytochemicals constituents and investigate their potential antioxidant, in order to validate the beneficial medicinal properties of this shrub in Algeria folk medicine. Total polyphenols, flavonoids and condensed tannins contents were determined using Folin-Ciocalteu’s, aluminum chloride and vanillin reagents, respectively. The in vitro antioxidant activity was evaluated by using 2,2-diphenyl-l-picrylhydrazyl and reducing power assay. E. arborea L. contains various compounds such as polyphenols, flavonoids, tannins, quinones, anthraquinones, saponins and terpenoids in different sub-fractions. All the tested extracts showed an appreciable total phenolic, flavonoids and condensed tannins contents as well as strong antioxidant capacity. The highest total phenolic and flavonoids content was found in the ethyl acetate extracts ranging from 649.38 to 944.55 mg gallic acid equivalent/g dry extract and 65.31 to 67.15 mg quercetin equivalent/g dry extract, respectively. Whereas, the highest condensed tannins content was found in the crude extract for leaves and aqueous extracts for flowers. The ethyl acetate extract of the flowers and the crude extract of leaves exhibited the better antioxidant activity by DPPH assay (IC50 =17.72 µg/mL) and reducing power assays (IC50 = 2.91 µg/mL), respectively. Our findings indicate that leaves and flowers extracts are rich in natural antioxidant substances and have good qualities in antioxidant properties and may be beneficial against diver’s disorders related to free radicals.
Show more [+] Less [-]Evaluation of yield decrease in common beans due to anthracnose (Colletotrichum lindemuthianum) below sub-temperate environment of Northwestern of Rwanda Full text
2023
Erastus Dushimeyesu | Sylvestre Habimana | Fabrice Musana Rwalinda | Mushayija James
The research was conducted in the year of 2021-2022 in Burera and Musanze District in Northern province as well as Rubavu District in Western Province with the aim of assessing the yield loss in common beans due to anthracnose by using four cultivars with various levels of resistance in field conditions in environment of Northwestern of Rwanda. Randomized complete block design as experiment design was used in this study where each selected cultivar was grown and the yield loss caused by anthracnose was assessed. A level of significance of P<0.05 . In field trials, on the particularly susceptible cultivar Gikundiro 2 particulary showed the maximum harm in terms of incidence and severity in both infection circumstances. The severity of pod infection ranging from 3-9 (0-) resulted in reduction in quantity of seeds which contain a pod ranging from 10.52 % -57.76 % and the loss in weight of seeds per pods ranging from 21.93 % - 68.77 %, both demonstrated a direct impact on seed yield. However, determinate cultivars showed a greater drop in yield (58.5%) than indeterminate cultivars (10.52%) although both were sensitive, based on this research, anthracnose causes economic yield loss on variety Gikundiro 2 and Vuzimpundu.
Show more [+] Less [-]Development of an Antimicrobial Topical Skin Cream with Using Wood Apple (Limonia acidissima L.) Pulp Against Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans Full text
2023
Fathima Fasha | Neelamanie Yapa
Skin inhabiting microbes mostly non-pathogenic and commensals on the skin. Among them Staphylococcus aureus, Pseudomonas aeruginosa, and Candida albicans often responsible for symptomatic skin infections. Cellulites, impetigo, ecthyma, red lesions and candidiasis are some of the common microbial skin diseases caused by skin pathogens. Wood apple (Limonia acidissima L.) is an underutilized fruit in Sri Lanka and, all parts of this plant have medicinal value. Considering the high therapeutic value, the aqueous extract of wood apple pulp was used. Antibacterial activity against Staphylococcus aureus, Pseudomonas aeruginosa and antifungal activity against Candida albicans was evaluated by using the standard well diffusion method. Above tested bacterial and fungal species were suspended in 3 mL of sterile distilled water separately and 108 CFU/mL population count was prepared. Aliquots of 100 µL of each suspension were inoculated and uniformly spread on Muller Hinton agar plates separately in triplicates. Wells were filled aseptically placing 50 µL of wood apple extracts, antimicrobial compounds specifically as the positive control for bacteria and fungi and sterile distilled water as the negative control. The plates were incubated at 37 °C for 24 - 48 hours and the diameter of the growth inhibition zones around the wells were measured. Furthermore, minimum inhibition concentrations of each extract were also evaluated. Comparisons were performed using one-way ANOVA followed by Tukey’s Pairwise Comparisons. The antimicrobial topical skin cream was prepared using 0.5 g mL-1 of wood apple pulp with sterile distilled water, mixed with the formulated standard ingredients. The results revealed that the aqueous extracts of wood apple pulp concentrations range from 0.15 g mL-1 to 1g mL-1 showed the antimicrobial potential of above skin pathogens variably ranged inhibition zone diameter 16 mm to 34 mm. The antimicrobial effect of the formulated cream against these pathogens was repeatedly tested. Further testing procedures needed to be followed before recommending wood apple topical antimicrobial skin cream as a marketable product.
Show more [+] Less [-]Analysis of Challenges Facing and Factors Influencing the Profitability of Dairy Cattle Enterprises in Southwestern Uganda Full text
2023
Denis Waiswa | Aytekin Günlü
In this study, challenges experienced by dairy cattle enterprises in Southwestern Uganda and the factors influencing their profitability were respectively analyzed using exploratory factor analysis and multiple regression in STATA 15.0 statistical software. Eighteen questions relating to the challenges experienced by dairy producers in the study area were factor analyzed using principal components analysis with varimax rotation. Kaiser-Meyer-Olkin’s measure of sampling adequacy was 0.643, above the commonly recommended value of 0.6, and Bartlett’s test of sphericity was significant (ꭓ² (153) = 1670.13, P<0.001). Using both the scree plot and eigenvalues greater than 1 to determine the underlying components, the analysis yielded five factors explaining a total of 67.42% of the variance in the data. These factors were investment constraints, productivity constraints, climatic and environmental conditions, veterinary and social security services, and marketing constraints, which explained 21.32%, 13.01%, 11.97%, 11.03%, and 10.097% of the variance after rotation, respectively. The factors hypothesized to influence the profitability of dairy enterprises were; daily milk yield per lactating cow, the prevalence rate of diseases, percentage of lactating cows to those raised on the enterprise, attendance of animal production training, the unit production cost of milk, and enterprise size according to the number of animals raised. Regression analysis results of these factors revealed that the unit production cost of milk, enterprise size, and daily milk yield per lactating cow were statistically significant. The estimated model had an R-squared value of 0.92. The recommendations emphasized in this study were reducing milk production costs, rational use of production resources, adopting improved cattle breeds, improving feeding by supplementing animal diets with concentrate feeds to increase milk yield, and general improvement in dairy herd management practices, including disease control strategies.
Show more [+] Less [-]Farklı Genotipik Damızlık Japon Bıldırcınlarında Canlı Ağırlığa Göre Seleksiyonun Yumurta Verim Özellikleri Ve Kuluçka Özelliklerine Etkisi Full text
2023
İsmail Can Batkı | Mikail Baylan | Kadriye Kurşun
Bu araştırma, farklı genotipik damızlık japon bıldırcınlarında yumurta verim özellikleri ve kuluçka özelliklerinin belirlenmesi amacıyla planlanmıştır. Araştırma da biri ticari (T) diğeri ise Çukurova Üniversitesinde yetiştirilen japon bıldırcını (CU) olmak üzere iki genotip kullanılmıştır. Her iki genotipten kuluçka sonunda 500 civciv elde edilmiştir. Elde edilen bıldırcınlar 5 hafta büyütüldükten sonra canlı ağırlığa göre seleksiyon yapılmıştır. Böylece, denemede 2 kontrol (TK, CUK), 2 seleksiyon (TS, CUS) ve 2 melez (TM, CUM) olmak üzere 6 farklı deneme grubu oluşturulmuştur. Her deneme grubundan 72 adet damızlık bıldırcın seçilmiş ve toplam 432 hayvan kullanılmıştır. Çalışmadan elde edilen bulgulara göre, damızlıklarda 14 haftalık ortalama yumurta verimi boyunca en yüksek yumurta veriminin %79,13 ile ticari seleksiyon grubunda, en düşük ise %69,38 ile Çukurova Üniversitesi melez grubunda olduğu bulunmuştur. Yumurta ağırlığı açısından 3, 4 ve 5. haftada muamele grupları arasında gözlenen farkların önemli olduğu tespit edilmiştir. Ayrıca, kuluçka özellikleri bakımından ticari kontrol grubunun diğer gruplara kıyasla daha yüksek değerler sağladığı görülmüştür. %5 ve %50 cinsi olgunluk ağırlığının sırasıyla 323,62 g ve 347,50 g ile CUS grubunda görüldüğü ve gruplar arasındaki farklılığın önemli olduğu bulunmuştur. Sonuç olarak, yumurta verimi ve kuluçka özellikleri bakımından ticari grup ve melezlerin üstün olduğu söylenebilir.
Show more [+] Less [-]Gıda Sistemlerinde Yenilebilir Filmler ve Kaplamalar Full text
2023
Semra Bozkurt | Özgül Altay | Mehmet Koç | Figen Kaymak Ertekin
Sentetik ambalajların çevre üzerindeki olumsuz etkilerinin azaltılması ve gıdaların doğal yollarla korunmasına yönelik tüketici taleplerinin artması bu alanda alternatif yöntemlerin araştırılmasına öncülük etmiştir. Ambalaj teknolojisindeki yeniliklerden biri olan yenilebilir film ve kaplamalar, nem, gaz, yağ ve aroma geçişine karşı bariyer işlevi görerek gıdaların raf ömrünü uzatmak ve kalitesini iyileştirmek amacıyla kullanılmaktadır. Gıdaların yüzeyine ince bir tabaka şeklinde uygulanan veya ambalaj materyali olarak kullanılabilen yenilenebilir film ve kaplamaların üretiminde protein, polisakkarit ve lipid gibi farklı biyopolimerler kullanılmaktadır. Bu biyopolimerlere ek olarak yenilebilir film ve kaplamaların mekanik ve fonksiyonel özelliklerini geliştirmek amacıyla plastikleştirici madde, emülsifiyerler, antioksidan ve antimikrobiyal maddelerden de yararlanılabilmektedir. Filmlerin yapılma tekniği, kullanılan kaplama materyali tipi, kullanılan plastikleştirici madde cinsi ve konsantrasyonu, film hazırlama aşamasında yapılan kurutma işlemi ve çevresel faktörler (sıcaklık, bağıl nem, basınç) yenilebilir film veya kaplamaların fiziksel ve mekanik özelliklerini etkileyen önemli faktörlerdir. Bu derleme makalede yenilebilir film ve kaplamalar için kullanılan film materyalleri, film hazırlama yöntemleri, filmlerin yapısını etkileyen çevresel ve yapısal faktörler bir arada derlenmiş, bu faktörlerin filmlerin kalite özellikleri üzerindeki etkileri değerlendirilmiştir. Aynı zamanda yenilebilir filmlerin gıdalarda kullanım alanları da değerlendirilmiştir.
Show more [+] Less [-]Application of the Ohmic Heating Process to Make a Semolina Dessert with Milk Full text
2023
Hatice Pınar Yüksel | Serdal Sabancı | Basri Omaç
Traditional milk desserts are one of the most essential dessert groups that Turkish society consumes. Due to foaming activity, it was aimed to investigate the feasibility of the ohmic heating system to produce a semolina dessert with milk. Hence, an ohmic heating treatment was used to heat the milk, semolina, and sugar mix from 20°C to 100°C using three different voltage gradients (15, 17.5, and 20 V/cm) and then boil for two minutes. It was found that the current value escalated from 20°C to approximately 86°C but decreased after 86°C due to foaming. Since the total consumed energy during the ohmic cooking treatment was inversely proportional to the treatment time, the total consumed energy values decreased based on the rising voltage gradient. As a result, the feasibility of the ohmic heating treatment for making a traditional semolina dessert with milk was determined in this study.
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