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Süt Kaynaklı Biyoaktif Bileşenlerin Antidiyabetik Etkisi Texte intégral
2025
Ayşe Nur Elmaskaya | Mubin Koyuncu
Tip 2 diyabet (T2DM), vücudun insülin hormonunu etkili bir şekilde kullanamamasıyla karakterize edilen ve yüksek kan şekeri seviyelerine yol açan kronik bir metabolik hastalıktır. Süt, T2DM yönetiminde olumlu etkileri olduğu belirtilen önemli besin bileşenleri bakımından zengin bir kaynaktır. Sütte kaynaklı biyoaktif bileşenler, süt proteinlerinden, yağlarından ve diğer bileşenlerinden türeyen, vücutta çeşitli biyolojik aktiviteler gösteren ve sağlık üzerinde olumlu etkiler sağlayan moleküllerdir. Bu bileşenler (proteinler, peptitler, yağ asitleri), süt ürünlerinin tüketimi sırasında ya da süt proteinlerinin sindirilmesi ve hidroliz edilmesi sonucunda ortaya çıkmaktadır. Son dönemde yapılan müdahale çalışmaları, süt kaynaklı biyoaktif proteinlerin, peptitlerin ve yağ asitlerinin T2DM'nin önlenmesi ve yönetiminde yararlı etkiler sağladığını göstermektedir. Süt biyoaktif bileşenleri arasında kazein, kazein türevi peptitler, peynir altı suyu proteinleri ve peynir altı suyu proteini türevi peptitler yer almaktadır. Bu biyoaktif bileşenler, çeşitli mekanizmalar aracılığıyla anti-diyabetik etkiler göstermektedir. Bu mekanizmalar arasında insülin duyarlılığının artırılması, glukoz metabolizmasının düzenlenmesi ve inflamasyonun azaltılması yer almaktadır. İnsanlarda gerçekleştirilen müdahale çalışmaları sonucunda, süt kaynaklı bu biyoaktif bileşenlerin açlık kan şekeri seviyelerini düşürdüğünü ve insülin duyarlılığını artırdığı ortaya koyulmuştur. Bu çalışma, sütten elde edilen biyoaktif bileşiklerin (proteinler, peptitler ve yağ asitleri) anti-diyabetik etkilerini ve bu bileşiklerin T2DM yönetimindeki etki mekanizmalarını inceleyen güncel çalışmaları kapsamlı bir şekilde ele almaktadır. Böylece, süt biyoaktif bileşenlerinin T2DM üzerindeki potansiyel faydaları ve klinik uygulamaları hakkında bir bakış açısı sunmaktadır.
Afficher plus [+] Moins [-]The Determination of Body Defects, Hatching and Chick Quality Traits in Partridge (Alectoris Chukar) Parents Texte intégral
2025
Selman Yıldırım | Mehmet Akif Boz | Kadir Erensoy
The aim of this study was to determine the relationships between body defects, egg and chick quality and hatching results at different age periods of the laying period of partridges raised in production conditions (cage system). The study was based on three different periods. The first period is the pre-peak egg production period (˂200 eggs), the second period is the peak egg production period (˃200 eggs) and the third period is the post-peak egg production period (˂200 eggs). These periods also represent the age of the animals. As material, 432 female and 216 male partridges in their first egg production year were used. The study was organized according to the random plots experimental plan. There were changes in body defects and other health parameters depending on egg production periods. Foot-pad dermatitis and elbow burns increased with increasing age. Parent partridges had better head, neck, back, chest and tail feather condition before peak egg production. Egg weight increased with advancing age. Hatching egg characteristics such as excessively pointed eggs and eggs with calcium deposits decreased in the peak and post-peak yield period. Eggshell transparency increased with advancing age. Fertility was higher in the pre-peak egg yield period compared to other periods. Hatchability was lower after the peak period. Tona score of chicks decreased with age. There were weak negative and positive phenotypic correlations between many traits. Practices that prevent body injuries in the early egg production period and deteriorating feather condition with advancing age, decreasing shell opacity, deterioration in hatching performance and chick quality traits in partridges will be beneficial in terms of increasing both production performance and animal welfare.
Afficher plus [+] Moins [-]The Effects of Pre-Slaughter Fasting Periods on Tonic Immobility, Slaughter, Carcass and Meat Quality Traits in Medium- and Fast-Growing Broiler Chickens Texte intégral
2025
Musa Sarıca | Kadir Erensoy | Mehmet Akif Boz | Gülse Sivil | Hatice Çavdarcı | Resul Aslan | Numan Karaçay
In this study, the effects of pre-slaughter fasting periods (8, 12, and 16 h) on stress levels, body weight loss, slaughter, carcass, and meat quality characteristics were investigated in broiler chickens with different growth rates (medium and fast-growing). In the experiment, 15 male and 15 female broilers each from the ANADOLU-T A1 (medium growing) dam line and ROSS-308 hybrid (fast growing) at 42 days of age were used. Body weight losses did not differ significantly among fasting periods, but medium-growing broilers exhibited higher body weight losses across all fasting groups (P<0.05). The carcass yield was higher in fast-growing broilers (P<0.05), while abdominal fat ratios were higher in medium-growing broilers (P<0.05). The amount of residual feed in the gizzard, digestive system, and gizzard ratios decreased with increasing fasting duration (P<0.05). Digestive system ratios also differed between genotypes (P<0.05). An increase in breast ratio was observed with longer fasting periods (P<0.05). On the other hand, the fast-growing genotype had higher breast ratios, lower wing ratios, lower back ratios, and lower neck ratios (P<0.05). Fasting periods did not significantly affect the L*, a*, and b* color values of breast and thigh meat, but differences between genotypes were significant, with higher values observed in the fast-growing genotype (P<0.05). Breast pH values did not differ among fasting periods but were higher in the fast-growing genotype (P<0.05). Thigh pH values, however, varied significantly between fasting periods and genotypes (P<0.05). The medium-growing genotype had higher thigh pH values, and thigh pH increased with longer fasting periods (P<0.05). White striping and woody breast scores in breast muscles were higher in the fast-growing genotype, with partial increases observed as fasting duration increased. In conclusion, the results indicate that a 12-h pre-slaughter fasting period is sufficient for digestive tract clearance and carcass quality. However, meat quality defects in fast-growing genotypes should be monitored.
Afficher plus [+] Moins [-]The Economic Determinants of Agricultural Value Added: A Panel Data Analysis on E7 Countries Texte intégral
2025
Ahmet Kasap
The agricultural sector plays a crucial role in economic growth, employment, and food security. Although E7 countries (Brazil, China, India, Indonesia, Mexico, Russia, and Turkey) hold a significant share in global agricultural production, there is limited literature on the determinants of agricultural value added. This study aims to analyze the key economic factors affecting agricultural value added in E7 countries and assess the effectiveness of agricultural policies. The study covers the period 2001-2022 and employs the Panel ARDL method to examine long-term relationships. The findings indicate that the proportion of agricultural land and agricultural employment positively impact agricultural value added, whereas government expenditures may have a negative effect. Governments intervene in the agricultural sector through both direct and indirect measures. It can be suggested that direct income support policies for farmers may have the potential to increase dependency rather than enhance productivity. Although a detailed distinction regarding the implementation of direct payments during the analyzed period could not be made, the impact of government support is likely to vary depending on the type and implementation of the assistance provided. The results emphasize the need for more effective planning of agricultural support mechanisms. Redirecting public expenditures towards infrastructure investments, agricultural technology adoption, and rural development projects could enhance the sector’s long-term sustainability. Additionally, improving the transparency and measurability of support policies may increase their effectiveness and strengthen agricultural productivity. Policymakers should conduct a more detailed analysis of the effects of different support mechanisms to develop appropriate intervention strategies.
Afficher plus [+] Moins [-]Effect of NaCl-induced Salt Stress at Germination and Early Seedling Growth Stage in Lupinus albus L. Texte intégral
2025
Ramazan Beyaz | Veli Vural Uslu
Salinity is a primary abiotic factor affecting agricultural productivity in arid and semiarid environments. The stages that are most vulnerable to salinity are germination and early seedling growth. There are limited reports on the responses of Lupinus albus L. to salinity. Therefore, in the study, we aim to test germination and early seedling growth of L. albus under different salinity levels. To this end, seeds of L. albus were treated with different concentrations (0, 50, 100, 150, and 200 mM) of NaCl under laboratory conditions. A total of 16 parameters, including germination and growth, were examined. The results showed that under 200 mM NaCl, germination percentage (GP) decreased by 13.4% and germination rate index (GRI) decreased by 69.24%, while mean germination time (MGT) increased by 30.02%. In addition, the shoot length (SL), root length (RL), shoot fresh weight (SFW), root fresh weight (RWF), and root dry weight (RDW), root to shoot dry matter (R/S DM), shoot water content (SWC), root water content (RWC), and seedling vigor index (SVI) were reduced respectively by 82.69%, 75.65%, 53.30%, 70%, 66.66%, 70.86%, 23.47%, 0.35% and 82.57% under 200 mM NaCl, compared to the control condition. However, root to shoot ratio (R/S), shoot dry weight (SDW), shoot dry matter (SDM), root dry matter (RDM) were increased by 43.33%, 65.07%, 249.68%, and 3.22% under 200 mM NaCl. Overall, the study results showed that the critical level to mitigate the negative effect of salinity is 150 mM NaCl (-0.6 MPa osmotic potential) for germination and 50 mM NaCl (-0.2 MPa osmotic potential) for growth. Therefore, L. albus has a low tolerance to salinity.
Afficher plus [+] Moins [-]Optimizing Artificial Shading for Microclimate, Yield, Leaf Nutrient and Economic Benefits in Sinceri (V. vinifera L.) Grape Cultivation Texte intégral
2025
Tuba Uzun Bayraktar | Önder Volkan Bayraktar | Mehmet Solak
This study was conducted on the Sinceri grape cultivar grown for both table and raisin (drying) purposes, in the 2021 growing season in Siirt/Türkiye. The primary objective was to create a microclimate within the vine canopy by installing net covers with different shading rates (35%, 55%, and 75%) during the veraison period, thereby delaying the harvest and obtaining high-quality, high-yield grapes. Regarding phenological development, the period between full bloom and harvest was the shortest under the 55% shading treatment, which also recorded the lowest mean temperature (28.54 °C) and the lowest Effective Heat Summation (EHS) value (1965.70 dd). The highest mean temperature (26.28 °C) was observed under the 75% shading treatment, while the highest EHS value (2401.05 dd) was recorded under the 35% shading treatment. In terms of yield compared to the control, the 35% shading treatment provided a 21.75% increase, the 55% treatment yielded a 57.44% increase, and the 75% treatment led to a 37.45% increase. Furthermore, it was determined that all shading treatments increased the macro- and micronutrient contents in grapevine leaves. Economic analyses for the Sinceri grape cultivar revealed that the shading treatments had a statistically significant effect on yield. In conclusion, the net cover with a 55% shading rate proved to be the most effective treatment.
Afficher plus [+] Moins [-]Evaluation of Antioxidant and Anti-inflammatory Potential of Alpinia officinarum with Different Ionic Solutions Texte intégral
2025
Nuray Üremiş | Figen Güzelgül | Ergül Belge Kurutaş
Alpinia officinarum, which attracts attention with its antioxidant and anti-inflammatory properties, is used in traditional medicine, especially to relieve stomach and digestive system disorders. Although many studies have revealed the various pharmacological effects of Alpinia officinarum, the effect of different ionic solvents on its biological activities has yet to be investigated. In this study, the effects of homogenization of Alpinia officinarum roots with potassium chloride (KCl), sodium chloride (NaCl), and phosphate (PBS) buffer solutions on the antioxidant and anti-inflammatory properties of the plant were investigated. Alpinia officinarum plant was collected from the Adana region during the season, and fresh root parts were separated and analyzed. Superoxide dismutase (SOD), catalase (CAT), myeloperoxidase (MPO) enzyme activities, and malondialdehyde (MDA) levels of plant homogenates prepared with KCl, NaCl, and PBS were determined by spectrophotometric analysis. The highest MPO and CAT enzyme activities were observed in the KCl solution, while lower levels were observed in NaCl and PBS solutions, respectively. The highest MDA level was observed in the PBS solution. Moreover, SOD enzyme activity showed a decreasing trend in NaCl, KCl, and PBS solutions, respectively. These findings suggest that the biological activity of plant extracts may vary depending on the solvent used. Determination of the conditions under which the antioxidant and anti-inflammatory effects of Alpinia officinarum in different ionic solvents are the highest supports increasing the bioavailability of the plant.
Afficher plus [+] Moins [-]Vermicompost Leach's Effect on Onion Seed Germination and Seedling Emergence in Response to Drought Stress Texte intégral
2025
Parimal Chandra Sarker | Md. Sadiqur Rahman | Maria Islam | Tanzina Alam | Mohammad Selim Reza
The Seed Technology Division, BARI, Gazipur, Bangladesh carried out a lab experiment in 2020–2021 to find the best vermicompost treatment for enhancing seed germination and seedling emergence in an environment of drought stress. With 4 replications, the experiment used a 2-factorial completely randomized design. Five different amounts of priming were applied to onion seeds: hydropriming, 5% vermicompost priming (VCP), 10% VCP, 15% VCP, and untreated control. In addition, the onion seedlings were treated with 10% and 15% PEG, two different levels of drought stress. BARI Piaj-4 onion was the kind that was used. The findings demonstrated that, under drought-stressed situations, seed priming with vermicompost leach improved seed germination and seedling emergence percent. especially, the vermicompost leach at 10% under 10% PEG drought stress condition showed the best results in terms of promptness index (123), germination stress tolerance index (84.25%), seed germination (90%), seedling emergence percentage (81%), and seedling vigor index (614).
Afficher plus [+] Moins [-]Variation of Secondary Metabolites, Chlorophyll Contents, and Antioxidant Activity in Six Medicinally Important Plants in Bangladesh Texte intégral
2025
Faruk Fakir | Md. Masudul Karim | Md. Jahid Hasan Jone | AKM Golam Sarwar | Md. Ashrafuzzaman
Plant phenolics and flavonoids function as antioxidants that act as scavengers of free radicals in the human body. This study aimed to determine the total phenolics and flavonoids contents, ferric-reducing antioxidant power (FRAP), free radical scavenging ability, chlorophyll contents, and total amounts of carotenoids of six medicinal plants viz. Anisomeles indica (L.) Kuntze, Eclipta prostrata (L.) L., Glinus oppositifolius (L.) Aug.DC., Litsea glutinosa (Lour.) C.B.Rob., Origanum vulgare L., and Oxalis debilis Kunth. The results reveal that L. glutinosa has the maximum amount of total phenolic content (TPC) (1.906 mg GAE g-1 FW) and total flavonoid content (TFC) (13.933 mg QUE 100g-1 FW), while the lowest TPC (0.2803 mg GAE g-1 FW) was observed in O. vulgare and the least TFC (1.6 mg QUE 100g-1 FW), was observed in A. indica. The leaves of L. glutinosa showed excellent antioxidant properties (IC50 = 6.24 mg mL-1), and G. oppositifolius showed the least antioxidant potential (IC50 =18.423 mg mL-1). Pigment content such as chlorophyll-a was highest in E. prostrata (1.5963 mg g-1), while L. glutinosa has the highest chlorophyll-b (2.176 mg g-1 FW), chlorophyll-(a+b) (3.6157 mg g-1 FW), and carotenoids (1.61 µg 100g-1 FW) content. A strong linear correlation (DPPH, R2 = 0.8688, FRAP, R2 = 0.8595) was found between TPC and antioxidative capability. L. glutinosa contains significant amounts of phenols and flavonoids, which have antioxidant qualities, suggesting the possibility of using this species in phytotherapy and pharmacy.
Afficher plus [+] Moins [-]Climate Change Trends and Vulnerabilities in Bangladesh’s Crop Sector: A Review of Crop Production Challenges and Resilience Strategies Texte intégral
2025
Md. Mejbah Uddin | Md. Aminul Hoque
Climate change has become one of the most important threats to worldwide agricultural production systems. This paper evaluates how Bangladesh, a prominent developing country in the low-lying Ganges-Brahmaputra-Meghna delta, is susceptible to climate change and assesses present agricultural practices that target sustaining production under these threats. The study synthesizes the ongoing research findings of climatic change tendency, involving the rising of temperature, alteration of precipitation pattern, along with the onward frequency of extreme weather incidence and their complication to crop production. It discusses the key susceptibilities of Bangladesh’s crop sector, such as a shortage of irrigation water, the impact of rising temperatures, increasing sea levels and the loss of biodiversity. Moreover, the study explores the resilience strategies and measures adopted by farmers, policymakers and researchers to alleviate the hostile effect of climate change on crop production. With all these considerations, the paper aimed to analyse the current climate change trend, adverse effects to agricultural sectors and existing resilience practices in Bangladesh as well as future strategies against climate change.
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