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Antioxidants and Mineral Contents of Chicory as Coffee Additive Texte intégral
2021
Uğur Başaran | Erdem Gülümser | Cennet Yaman | Medine Çopur Doğrusöz | Hanife Mut
In this study, roots of Turkish origin wild chicory (Cichorium intybus L.) genotypes were investigated for total flavonoid and phenolic contents, radical cation scavenging activity (ABTS), Free radical scavenging activity (DPPH), and radical, mineral content. These characteristics were also compared with other coffee varieties. The total flavonoid and phenolic contents ranged between 0.290-4.350 mg QE/g dry weight (DW) and 0.943-13.860 mg GAE/g DW. The DPPH was listed here from high to low value: raw coffee beans = roasted coffee beans > roasted fruits of turpentine tree > instant coffee = roots of chicory. The content of P, Ca, Mg, Zn, B, Cr, Co and Mo ranged between 0.71-2.78%, 0.25-0.46%, 7.29-20.66, 4.44-11.07, 0.40-1.67, 0.49-5.48 and 5.69-14.46 ppm, respectively. As a result, chicory roots exhibited low antioxidant activity, but higher mineral content compared to the other tested coffee varieties which indicates that chicory could be used a coffee additive.
Afficher plus [+] Moins [-]Effects of Insecticides on Honey Bee Behavior and Physiology Texte intégral
2021
Berkant İsmail Yıldız | Kemal Karabağ
In recent years, there have been unexplained colony losses around the world. Due to the decrease in honey bee colonies, many studies have been carried out to investigate potential causes. One of the main causes of losses is also insecticides. Insecticides used against harmful insects in agricultural fields affect not only harmful ones but also beneficial insects such as honey bees directly or indirectly. Honey bee losses are more common, especially where insecticides are used, and the immune systems of bees exposed to insecticides in these areas weaken; foraging behavior, the ability to smell and learn is impaired. In addition, it leaves residues in bee products such as honey, wax, pollen and bee bread. Effective and sustainable solutions are sought worldwide in order to cope with these losses that pose a major ecological threat. This review aims to reveal the current situation by examining the effects of insecticides on honey bee behavior and physiology.
Afficher plus [+] Moins [-]Effect of Industrial and Domestic Processing Techniques On the DNA Degradation of Anchovy Texte intégral
2021
Elif Tuğçe Aksun Tümerkan
Food fraudulent activities have become a serious issue over the world recently. Seafood products have trading and profitable potential in Turkey owing to the abundance of fisheries and other species. While morphological features are commonly used for species identification in raw seafood products, this identification does not meet the correct classification in cryptic species and processed seafood products. Molecular techniques have been utilized for species authentication in processed seafood items successfully. In this study, the effect of different processing techniques on the DNA quality and DNA degradation isolated from raw and processed anchovy was investigated. Anchovy is one of the important species in both fisheries activities and processing and consumption in Turkey. For this aim, DNA was isolated from processed anchovy groups and un-processed anchovy groups as control by the same extraction methods and the quality of DNA was compared among the groups. The most common processing techniques, frying, baking, smoking, roasting, baking and grilling were applied to anchovy. The results revealed that not only different thermal processing but also treatment with acid and salt cause DNA degradation and quality loss of DNA parameters which are essential for authentication of species and traceability for public health.
Afficher plus [+] Moins [-]Performance Evaluation of Exotic and Local Landraces of Tomatoes for the Mid-Hill Conditions of Nepal Texte intégral
2021
Tek Prasad Gotame | Ishwori Prasad Gautam | Dipendra Ghimire | Surendra Lal Shrestha
The productivity of tomato in Nepal is very low due to lack of high yielding, disease and pests resistant varieties. An experiment was carried out to evaluate horticultural traits of 50 genotypes obtained from World Vegetable Centre (WorldVeg), Taiwan and SAARC region, and local collections during March to August 2020 in open field conditions at National Horticulture Research Centre, Khumaltar, Lalitpur. The objectives were to identify promising open-pollinated tomato cultivars for high yield, appropriate fruit size, and disease resistant. The experiment was carried out in a randomized complete block design with three replications. Results showed significant differences in yield and yield attributing characters including virus infection. The highest yield (39.6 mt ha-1) was produced by HRA43 and it was followed by HRA33 (26.4 mt ha-1). Among the WorldVeg OP lines, AVTO1429 produced the highest yield (16.21 mt ha-1) and it was followed by AVTO1717 (12.95 mt ha-1), AVTO0922 (11.83 mt ha-1) and AVTO1219 (11.7 mt ha-1) respectively. Most of the WorldVeg lines performed better than the check variety ‘Pusa Ruby’. Genotype HRA43, Red Local and Sindhupalchock Local were not affected by virus while Yellow Local showed 3.3% infection. Among the WorldVeg lines, AVTO1712 (20%), AVTO1717 (20%) and AVTO1718 (13%) and AVTO1219 (15%) showed less than 20% virus infection in the open field conditions. Cluster analysis using the unweighted paired group method with arithmetic mean showed that cluster-1 was the largest cluster comprised of 40 genotypes followed by cluster-2 and cluster-4. Genotypes from cluster-4 showed the higher fruit yield (25.1 mt ha-1) and resistant to the virus and the highest number of fruits per plot (1978 in 4.5 m2 area). The yield was low in cluster-1 which could be due to the heavy rainfall during the vegetative and reproductive stages. Genotypes Red Local and Sindhupalchock Local could be used in future tomato breeding program due to their resistant to TYLCV, higher potential yield and highest plant vigour in open field conditions at the mid-hill of Nepal. Considering the overall performance, genotype HRA43, HRA33 and AVTO1429 were promising lines with performance for yield and other horticultural traits.
Afficher plus [+] Moins [-]Determinants of Ethiopia’s Coffee Bilateral Trade Flows: A panel Gravity Approach Texte intégral
2021
Bekele Wegi Feyisa
Ethiopia’s export earning is heavily dependent on primary agricultural commodities and raw materials. Coffee has been the principal export commodity of Ethiopia for many years and continued to be the leading export commodity. The objective of this paper was, therefore, to identify the determinants of Ethiopia’s coffee export to the major trading partners. Eighteen countries were selected based on the importance of the country as Ethiopia’s coffee export destination and availability of the required data. Annual panel data from 2001 to 2016 was collected from FAO database and other relevant sources. After appropriate econometric tests had been applied, random effect model was selected and used to analyze the data. From the seven variables entered into the model, four variables were found to affect Ethiopia’s coffee export significantly. GDP of the importing countries and population size of Ethiopia affect Ethiopia’s coffee export positively as expected. Weighted distance between Ethiopia and its trading partners was also found to have an expected effect, negative, on Ethiopia’s coffee export. Contrary to the hypothesis, foreign direct investment flows to Ethiopia affected Ethiopia’s coffee export negatively. Based on the results, the study draws conclusion and policy implications. To increase Ethiopia’s coffee export, government and other stakeholders should give prime attention to countries where there is high demand for Ethiopia’s coffee. Moreover, coffee exporters should exploit the existing nearest market opportunities. Finally, favourable conditions should be created for the large unemployed labor of the country to increase coffee production and export.
Afficher plus [+] Moins [-]Antiviral Effects of Microalgae Texte intégral
2021
Aybike Türkmen | İhsan Akyurt
Antiviral Effects of Microalgae Texte intégral
2021
Aybike Türkmen | İhsan Akyurt
Microalgae, also called phytoplankton by biologists, are very small plant-like organisms with a diameter of 1-50 micrometers without roots, stem and leaves. Microalgae, which have hundreds of thousands of species in both fresh waters and seas, form the lowest link of the food chain in aquatic ecosystems. Most species contain chlorophyll, use sunlight as an energy source, and convert carbon dioxide into biomass (biomass). Because of their role in the photosynthesis process, microalgae produce most of the oxygen in the atmosphere. It has a very wide biodiversity and is reported to contain more than 200 thousand species. As a result of genetic analysis, a continuous increase in microalgae species is observed. More than 15 thousand new chemical compounds have been discovered from algae in recent years. It has been observed that most of the bio compounds obtained from microalgae have antiviral effects. However, although extensive research has been done on the antibacterial, antioxidant and antifungal effects of these bioactive compounds, there is limited research on their antiviral effects. In these limited number of studies on the antiviral effects of microagines, it has been reported that some biocompounds isolated from algae may be effective against viruses that are the cause of diseases such as “HIV, SARS and AIDS”. However, the number of researches on viruses that cause today's biggest pandemic, such as coronavirus, of different biocompounds isolated from microalgae, is very small. To date, no vaccine that can be effective against the COVID-19 virus or a drug that can inhibit the reproduction of the virus has not been found. It is thought that micro or macro algae may be one of the most promising natural resources in solving this global health problem. Because Spirulina, which is a microalgae, has antiviral, anticancer, antidiabetic, antibiotic, antioxidant, prebiotic, cardiovascular system protective and antiallergic effects and these positive effects are caused by bioactive compounds found in high content (Rosales-Mendoza et al., 2020a). In this review, especially the antiviral effects of microalgae were tried to be summarized and it was tried to be emphasized that algae could be promising natural resources in the development of new antiviral drugs by our country's scientists.
Afficher plus [+] Moins [-]Efecto de variedades de algodón genéticamente modificadas sobre larvas de Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) Texte intégral
2014
Valencia Cataño, Sandra Jimena | Rodríguez Chalarca, Jairo | Mesa Cobo, Nora Cristina
Spodoptera frugiperda es una plaga polífaga de importancia económica en países tropicales y subtropicales. En Colombia ataca el algodonero (Gossypium hirsutum L.), cultivo que ha tomado importancia gracias a la adopción de variedades genéticamente modificados (GM). En el estudio se determinaron los efectos subletales de algunas de estas variedades sobre larvas de este insec-to. Para el efecto, en condiciones de laboratorio (27°C, 65 ± 10% HR y 12 h fotoperiodo) se eva-luaron las variedades NuOPAL RR (proteína Cry1Ac), DP141 B2RF (proteínas Cry1Ac+Cry2Ab) y DeltaOPAL RR (no Bt). Los parámetros evaluados fueron: (a) peso de larvas, (b)peso de heces, (c) peso del alimento ofrecido y (d) peso del alimento no consumido. Como índices de consumo y digestibilidad se calcularon la tasa relativa de consumo (TRCo), la tasa relativa de crecimiento (TRCr), la eficiencia de conversión del alimento ingerido (ECI) y la digestibilidad aproximada (DA). Los índices mostraron actividad antialimentaria de la variedad DP141 B2RF (Cry1Ac+Cry2Ab) que afecta de forma negativa la tasa de crecimiento y la conversión del alimento por parte de las larvas. El peso de las larvas alimentadas en DP141 B2RF (Cry1Ac+Cry2Ab) fue 58.6% menor que en la variedad no Bt. Los resultados muestran un efecto adverso de la variedad DP141 B2RF (Cry1Ac+Cry2Ab) en el desarrollo larval de S. frugiperda. Se confirman los efectos antibió-ticos del las variedades GM evaluadas que inciden en un menor desarrollo y en la supervivencia de las larvas
Afficher plus [+] Moins [-]Efecto de variedades de algodón genéticamente modificadas sobre larvas de Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) Texte intégral
2014
Valencia Cataño, Sandra Jimena(Centro Internacional de Agricultura Tropical (CIAT)) | Rodríguez Chalarca, Jairo(Centro Internacional de Agricultura Tropical (CIAT)) | Mesa Cobo, Nora Cristina(Universidad Nacional de Colombia, sede Palmira Facultad de Ciencias Agropecuarias)
Spodoptera frugiperda es una plaga polífaga de importancia económica en países tropicales y subtropicales. En Colombia ataca el algodonero (Gossypium hirsutum L.), cultivo que ha tomado importancia gracias a la adopción de variedades genéticamente modificadas (GM). En el estudio se determinaron los efectos subletales de algunas de estas variedades sobre larvas de este insecto. Para el efecto, en condiciones de laboratorio (27°C, 65 ± 10% HR y 12 h fotoperiodo) se evaluaron las variedades NuOPAL RR (proteína Cry1Ac), DP141 B2RF (proteínas Cry1Ac+Cry2Ab) y DeltaOPAL RR (no Bt). Los parámetros evaluados fueron: (a) peso de larvas, (b)peso de heces, (c) peso del alimento ofrecido y (d) peso del alimento no consumido. Como índices de consumo y digestibilidad se calcularon la tasa relativa de consumo (TRCo), la tasa relativa de crecimiento (TRCr), la eficiencia de conversión del alimento ingerido (ECI) y la digestibilidad aproximada (DA). Los índices mostraron actividad antialimentaria de la variedad DP141 B2RF (Cry1Ac+Cry2Ab) que afecta de forma negativa la tasa de crecimiento y la conversión del alimento por parte de las larvas. El peso de las larvas alimentadas en DP141 B2RF (Cry1Ac+Cry2Ab) fue 58.6% menor que en la variedad no Bt. Los resultados muestran un efecto adverso de la variedad DP141 B2RF (Cry1Ac+Cry2Ab) en el desarrollo larval de S. frugiperda. Se confirman los efectos antibióticos de las variedades GM evaluadas que inciden en un menor desarrollo y en la supervivencia de las larvas. | Spodoptera frugiperda, is a polyphagous pest with economic importance in tropical and subtropical countries. In Colombia, S. frugiperda is a secondary pest in cotton. This cultivar has gained importance due to the adoption of genetically modified crops (GM). The objective of this study was to determine the sub-lethal effects of GM cotton varieties on S. frugiperda larvae. In order to do so, NuOPAL RR (Cry1Ac), DP141 B2RF (Cry1Ac+Cry2Ab) and DeltaOPAL RR (No-Bt) varieties were tested under laboratory controlled conditions (27°C, 65 ±10% RH and 12 h photoperiod). The parameters to be evaluated were: (a) weight of larvae, (b) weight of feces, (c) weight of provided food and, (d) weight of non-consumed food. Digestibility and consumption indexes were calculated: Relative Consumption Rate (RCR), Relative Growth Rate (RGR), Efficiency of the Conversion of Ingested Food (ECI) and the Approximate Digestibility (AD). The nutritional indexes show antifeedant activity of DP141 B2RF, (Cry1Ac+Cry2Ab), affecting in a negative way the growth rate and the conversion of larvae food. The weight gained by larvae fed with DP141 B2RF (Cry1Ac+Cry2Ab) was 58.6% less than the control. These results suggest an unfavorable effect of DP141 B2RF (Cry1Ac+Cry2Ab) in the larval development of S. frugiperda. The antibiotic effects were confirmed observing minor development and a negative effect in the survival of larvae fed on GM cotton.
Afficher plus [+] Moins [-]Outbreak investigation of lumpy skin disease in dairy farms at Barishal, Bangladesh Texte intégral
2021
Md. Ibrahim Khalil | Mohammad Ferdous Rahman Sarker | F. M. Yasir Hasib | Sharmin Chowdhury
Lumpy skin disease is explained as a significant cattle disease affecting cattle of many parts of the world. An outbreak was experienced in different parts of Bangladesh including Barishal for the first time in the last quarter of 2019. This investigation was carried out to know the outbreak scenario of the disease in southern part of Bangladesh. A total of 726 cattle were included in this study covering 50 dairy farms of Barishal region from September 2019 to December 2019. Morbidity rate was found 21% (CI: 18-24%) and mortality was 1% (CI: 1-2%) in the outbreak area. Young animals (24%) and pregnant animals (70%) were significantly more susceptible compared to aged animals (17%) and non-pregnant animals (15%), respectively. Moreover, male and crossbred cattle were slightly more prone to the infection in comparison to their counterparts. About 45% of the affected animals showed nodular and remaining 55% had edematous lesions. Almost 90% of the affected animals were treated with NSAID followed by antibiotics, antihistaminic, steroid drugs and antiviral drugs where only 20% of the affected animals were treated by authorized veterinary personnel. This was the first epidemiological investigation in the mentioned outbreak area which may serve as a baseline for LSD research in the location needed for developing effective control strategy.
Afficher plus [+] Moins [-]Green Tea: Conventional Facts and its Frontier Prospect on Health- A review Texte intégral
2021
Swarup Kumar Kundu | Shonkor Kumar Das | M. Sohidullah
Green tea obtained from the leaves of Camellia sinensis (L.) Kuntze having potential health benefits. It contains significant amounts of antioxidant and is considered as world healthiest drink. Polyphenols in tea are thought to exhibits anti-carcinogenic and anti-inflammatory effects. Green tea catechins acts as immune modulators in immune dysfunction and also play a role in protection from degenerative diseases. Intake of green tea catechins suppress high fat diet induced obesity, prevent lipid and glucose metabolism disorders and reduce risk of coronary heart disease. Green tea constituent epigallocatechin-3-gallate (EGCG) is a potential antioxidant that shows protective effects against photo toxicity and photo carcinogenesis. In vitro animal experiments have suggested that polyphenols in green tea protect from lung cancer by their antioxidant and antimutagenic properties. This study chiefly highlights the convenience of green tea on health and propagates its further prospects.
Afficher plus [+] Moins [-]Önemli Tıbbi Bitkilerden Biri Olan Achillea millefolium L. (Civanperçemi) Bitkisinin Besin Elementi Konsantrasyonları ve Antioksidan Aktivitesi Texte intégral
2021
Handan Saraç | Hasan Durukan | Ahmet Demirbaş
Bu çalışmada, tıbbi nitelik taşıdığı bilinen Achillea millefolium L. (Civanperçemi) bitkisinin besin elementi konsantrasyonlarının ve antioksidan aktivitesinin belirlenmesi amaçlanmıştır. Bu amaçla; Sivas ili Divriği ilçesinden toplandığı bilinen Civanperçemi bitkisinin makro ve mikro besin elementi konsantrasyonları ile su ekstresinin toplam antioksidan seviyesi (TAS), toplam oksidan seviyesi (TOS) ve oksidatif stres indeksi (OSI) değerleri belirlenmiştir. Çalışmadan elde edilen sonuçlara göre; Civanperçemi bitkisinin bazı makro ve mikro besin elementi konsantrasyonları bakımından yeter düzeyde olduğu, makro elementlerden azot (N), fosfor (P), potasyum (K), kalsiyum (Ca) ve magnezyum, mikro elementlerden demir (Fe), çinko (Zn), mangan (Mn) ve bakır (Cu) konsantrasyonlarının sırasıyla %1,01 N, %0,63 P, %2,43 K, %2,22 Ca, %0,70 Mg, 360,4 mg/kg Fe, 47,6 mg/kg Zn, 85,5 mg/kg Mn ve 28,3 mg/kg Cu olduğu tespit edilmiştir. Antioksidan potansiyelinin ise orta düzeyde olduğu belirlenmiştir. Ayrıca, bitkinin oksidan kapasitesi ve oksidatif stres indeksi düşük olarak tespit edilmiştir.
Afficher plus [+] Moins [-]An Important Genotype for Sustainable Extensive Goat Production Systems of Turkey: The Gökçeada Goat Texte intégral
2021
Cemil Tölü | Türker Savaş
In this study, it was aimed to report some traits of Gökçeada goats, which raised under the natural conditions of Gökçeada, with respect to their protection within the scope of genetic resources. In this respect the information obtained from the goats supplied from the Island and reared in a semi-intensive system at Çanakkale Onsekiz Mart University and also the information obtained from the literature were collected and the biological and zootechnical identifications of the Gökçeada goat were performed. Gökçeada goats, which are predominantly black, have yellow or red blazes on both sides of their heads including their eyes. It was seen that Gökçeada goats had similar body measurements and lower live weights as compared to those of the same species on the mainland. The birth weight and the mature live weight of Gökçeada goats were found as 2.55 kg and 38 kg, respectively, whereas their mean kid yield per goat at birth was determined as 1.6 to 1.8 kids. Individuals with a milk yield of 591 kg were striking in the Gökçeada genotype, in which the mean lactation length and the mean lactation milk yield were determined as 251 to 259 days and 227 to 245 kg, respectively. Its milk fat (4.92-5.75%) and milk protein (3.29%) resembled those of our other native breeds. It is necessary to reveal, with more elaborate studies, the potential for Gökçeada goat cheese that is greatly demanded on the Island. It was determined that the Gökçeada kids, which were considered as dairy kids, had some small but nonfat carcass and that their meat was soft and of a light color and had a slight smell. One should be careful about the adaptation of the Gökçeada genotype, which successfully maintains itself under the island conditions and which is the source of income for producers, to intensive and extensive goat production systems.
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