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Monitoring of Heavy Metal Pollution in Water and Sediments at the Mid-Black Sea Region by Using Passive Sampling Method Diffusive Gradients in Thin Films Texte intégral
2021
Arife Şimşek | Şule Sancak | Gülfem Bakan
Determining the potential bioavailability of heavy metals, evaluating according to adapted regulations is essential to efficiently conserve our coastal and estuarine waters. In this study, it is aimed to determine the industrial pollution and various other pollution sources that the Black Sea Basin is exposed to by using DGT (Diffusive Gradients in Thin Films) method and grab (manuel) sampling method in water and sediment and to evaluate the existing pollution according to quality standards. In Samsun, seasonal samples were collected from five different sampling stations, namely Akkiraz Stream, Hıdırellez Stream, Organized Industrial Zone (OIZ) Channel, Şabanoğlu Stream and Selyeri Stream, which are selected from Tekkeköy region where industry is intensively active. In order to determine the heavy metal content in both water and sediment samples, the DGT method was chosen for passive sampling and the grab sampling method was used for active sampling, and the efficiency of the methods was evaluated. According to the results of the study, the heavy metal concentration in grab sampling for water samples in descending order Al> Fe> Zn> Pb> Ni> Cu; In the samples taken with DGT, they are listed as Al> Fe> Zn> Cu> Ni> Pb. There were significant relationships between the total metal concentrations of sediment (Csed) and water (Csu) in grab sampling and metal concentrations sediment (Csed-DGT) and water (Csu-DGT) measured by DGT. It was found that the sensitivity and performance of sampling with DGT was 2-10 times higher compared to grab sampling. The high resolution in situ DGT technique for the assessment and management of the potential release risk of heavy metals at the water-sediment interface is a complementary method that contributes to the standard grab sampling method.
Afficher plus [+] Moins [-]Culinary Temperature Variably Affects the Antioxidant Content of Some Local Spices and Green Herbs Texte intégral
2021
Choumessi Tchewonpi Aphrodite | Sonchieu Jean | Yong Deloris Kuoh | Tenyung Esther Eyen | Mbouh Mariama | Nantia Akono Edouard
Spices and herbs are groups of vegetables with important properties for human health and food industries. They are generally consumed in cooked recipes and such treatment may affect the content of vital components such antioxidants. This study aimed at evaluating the effect of the cooking temperatures on total phenolics, flavonoids and vitamin C of some spices and herbs used in the locality of Bamenda, Cameroon. Briefly, the most consumed spices and herbs were selected through structured questionnaires administered to individuals involved in their consumption and selling. Thereafter, samples were collected and subjected to different boiling treatments and the levels of the antioxidants (flavonoids, phenols and vitamin C) were determined. Results showed that almost half the participants (48%) used Parsley, Basil, White pepper, Njansa, Mint and African nutmeg mainly for flavoring and medicinal purposes. The cooking temperature of 65°C increased total phenolics and flavonoids in spices (Mint, White pepper, Njangsa and African nutmeg) and herbs (Parsley, Basil) while higher heat treatments (75 and 85°C) lowered the content of these pytochemicals. Boiling of spices or herbs significantly and temperature dependently reduced the vitamin C content in all spice and herb samples with respect to the control raw samples. Summarily, the moderate boiling (65°C) treatment used by the local populations favors release of total phenolics and flavonoids though with some reducing effect on vitamin C.
Afficher plus [+] Moins [-]The Effect of Different Phosphorus Doses Application on Yield and Nutrient Uptake of Sugar Beet (Beta Vulgaris L.) Plant Texte intégral
2021
Ahmet Demirbaş
In this study, the effect of different phosphorus doses application on the yield and nutrient uptake of sugar beet plant was investigated under field condition. The study was carried out in Sivas province in 3 replications according to the randomized plot design and Valentina was used as the sugar beet variety. Phosphorus doses were; 0 kg P da-1, 15 kg P da-1, 30 kg P da-1 and applied as triple super phosphate (TSP). Leaf samples were taken approximately 80 days after the planting of sugar beet plant, nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), zinc (Zn), manganese (Mn), copper (Cu) concentrations and yield were determined at harvest. Research results indicated that the yield increased depending on the increasing phosphorus doses and the highest yield was obtained at 30 kg P da-1 dose with 8151.0 kg da-1. In addition, the highest nitrogen, phosphorus and potassium concentrations were found at 30 kg P da-1 dose (4.77% N, 0.74% P and 2.39% K, respectively). However, the research found that calcium and magnesium concentrations decreased with increasing phosphorus doses. While only iron concentration among microelements increased with phosphorus applications, zinc, manganese and copper concentrations decreased due to increasing phosphorus doses.
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 [-]Examination of the Use of Sculpture in the Open-Green Areas of Selçuk University Alaeddin Keykubat Campus Texte intégral
2021
Ruhugül Özge Gemici | Serpil Önder
The sculpture, which is the expression of beliefs and fears in prehistoric times, has taken on different roles as an urban reinforcement element in all cultures with numerous themes. In the Middle Ages, it became an organic part of the architectural structure, teaching the truth about religious beliefs. With the Renaissance movement, it became independent by breaking away from the architectural structure and moved to the urban space. In the twenty-first century, its dimensions have grown to be equivalent to architecture, it has created its own space and established new aesthetic and functional relations with the audience. In this study, the relationship of some sculptures on the Alaeddin Keykubat campus of Selcuk University with the landscape elements was examined in terms of design elements and basic design principles. In the light of the data obtained, suggestions have been developed in order to increase the life and aesthetic quality of the campus.
Afficher plus [+] Moins [-]Effects of Environmentally Relevant Ammonium Nitrate Levels Caused by Agricultural Activities on Four Amphibian Species in The Eastern Black Sea Region Texte intégral
2021
Handan Karaoglu
Within the scope of this research, the chronic effects of ammonium nitrate, which is the most widely used fertilizer worldwide, on the tadpoles of Marsh Frog (Pelophylax ridibundus), the Iranian Long-Legged Frog (Rana macrocnemis), the Caucasian Parsley Frog (Pelodytes caucasicus) and the Variable Green Toad (Bufotes variabilis) were examined. To assess the chronic effects of the fertilizer, the tadpoles of all the species were exposed to 0, 5, 10, 15, 20, 25 mg/L concentrations in same conditions. The chronic concentrations were applied from the 25th developmental stage to the 42nd developmental stage. It was defined at the end of the experiments that although there were some variability between different populations of the same species or between different species in the observed effects, chronic levels of ammonium nitrate caused decreased growth rate, prolonging in time to complete metamorphosis, increased abnormalities, and mortality in general. Among the 4 amphibian species, the Variable Green Toad was the most damaged one in terms of growth reduction (on average 31-41 %), abnormality rates (on average 50-75 %), prolonged time to complete metamorphose (14-21 days on average) and mortality rates (%54-100). The most adaptive species and the least damaged one was an Iranian long-legged frog for growth reduction (on average 0-15 %), prolonged time to complete metamorphose (7-9 days on average), and mortality rates (%9-15). All the harmful effects of chronic fertilizer levels caused by agricultural activities in the region had very important for examined species in our researches and it can be said that important environmental and biodiversity problems may occur if certain precautions are not taken regarding the use of the fertilizers and if the attitudes of the farmers on this issue cannot be changed.
Afficher plus [+] Moins [-]The Use of Different Fat Sources on Performance, Egg Quality and Egg Yolk Fatty Acids Content in Laying Quails Texte intégral
2021
Rabia Göçmen | Gülşah Kanbur | Yusuf Cufadar
In this study, the performance, egg quality, egg yolk colour and fatty acids profile of quails fed on diets containing different fat sources were determined. During 8 weeks trial, a total of 75, 10-weeks-old laying quails were used. Three diets were formulated to contain soybean oil (SBO), sunflower oil (SFO) and hempseed oil (HSO), respectively. The performance parameters were not significantly influenced by the dietary different oil sources. Eggshell ratio, eggshell thickness, eggshell breaking strength, egg shape index, egg yolk index, albumen index and egg yolk colour values (except a*) were not influenced by the different dietary oil sources. The a* value was significantly affected and the highest a* value was the HSO of group. The different oil sources supplementation to the diets was effective on fatty acid composition of the egg yolk. The highest value in terms of α-linolenic acid, total polyunsaturated fatty acids and total n-3 fatty acids were found in the diet fed group with HSO added. As a result; supplementation of different sources of oil to quail diets without negatively affecting performance and egg quality can be used to change the egg yolk fatty acid composition. Hempseed oil may increase the amount of total polyunsaturated fatty acids and total n-3 fatty acid content of egg yolk.
Afficher plus [+] Moins [-]Endofit Bakteri Uygulamalarının Farklı Kuraklık Stresi Koşulları Altındaki Biber Fide Gelişimine Etkileri Texte intégral
2021
Aynur Sadak | Abdulrahman Smail İbrahim | Suat Şensoy
Çalışma, endofit bakteri uygulamalarının farklı kuraklık stresi altında yetiştirilen biber fidelerinin gelişimi üzerine etkisini ortaya koyabilmek amacıyla, kontrollü koşullarda saksı denemesi şeklinde yürütülmüştür. Biber çeşidi olarak Mostar F1; endofit bakteri olarak da Ochrobactrum sp. (CB36/1) ve Bacillus sp. (CA41/1)) izolatları uygulanmıştır. Bakteri uygulaması, 109 cfu/ml yoğunluğunda iki kez (ilk uygulama 10 ml- ikinci uygulama 15 ml) yapılmıştır. Tohum ekiminden itibaren, 52 gün boyunca tüm saksılar düzenli olarak sulanmıştır. Kontrol (B0) uygulamalarında sulamalara 2 gün aralıklar ile devam edilmiş; ikinci uygulamada (B1) dört günlük bir kuraklık stresi ve son uygulamada (B2) ise 8 günlük bir kuraklık stresi uygulanmıştır. Bitki gelişim parametreleri olarak; gövde çapı, sürgün boyu ve kök uzunluğu, sürgün yaş ve sürgün kuru ağırlığı, yaprak sayısı, kök yaş ve kök kuru ağırlığı incelenmiştir. B1 ve B2 stres uygulamalarının, bitki gelişimine etkisinin genel olarak olumsuz olduğu tespit edilmiştir. Endofit bakterileri uygulamalarının ise farklı kuraklık streslerinin yol açtığı olumsuzluğa karşı nispeten olumlu düzeyde etkilere sahip olduğu belirlenmiştir.
Afficher plus [+] Moins [-]Tıbbi ve Aromatik Bitkilerin Ekstraksiyon Yöntemleri, Gıdalarda Kullanımı ve Takviye Edici Gıda Alanında Değerlendirilmesi Texte intégral
2021
Derya Arslan | Merve Aydın | Selman Türker
Tıbbi ve aromatik bitkiler (TAB), tüketicilerin doğal beslenme ve yaşama olan ilgisinin artmasıyla birlikte son yirmi yılda ön plana çıkmıştır. Türkiye, bulunduğu coğrafi konum, sahip olduğu iklim ve bitki çeşitliliği sayesinde TAB açısından önemli bir yere sahiptir. Oldukça geniş bir varyete gösteren TAB’ın; lezzet, koku, tat verici, antimikrobiyal, antioksidan ve terapötik gibi etkileri nedeniyle çeşitli formlarda (bütün, öğütülmüş, toz, ekstrakt, ekstre, hidrosol veya uçucu yağlar) kullanımları mevcuttur. Bileşimlerindeki sekonder metabolitlerden dolayı tıp ve eczacılık alanlarının yanı sıra fonksiyonel gıda bileşeni ve takviye edici gıda olarak kullanımları da önem taşımaktadır. Son yıllarda dünya ölçeğinde artarak yaşanan küreselleşme, kentleşme, değişen yaşam koşulları ve beslenme alışkanlarının farklılaşması ile birlikte ortaya çıkan yetersiz ve dengesiz beslenme sonucu tüketicilerin takviye edici gıdalara yönelimini artırmıştır. Takviye edici gıdalar pazarında TAB’ın kullanımına daha fazla yer verilmesiyle bu alanda gerekli düzenlemelere gidilmiştir. Bu derlemede, TAB ile bunların takviye edici gıda üretiminde kullanımı üzerine bazı bilgilere yer verilmiştir.
Afficher plus [+] Moins [-]Effect of Ferrous Gluconate on Chromosomal Abnormality Index of Allium Cepa Root Tip Texte intégral
2021
Nergis Kaya
In completed research, ferrous gluconate -a food additive- used to preserve black color to prevent discoloration during storage in ripe black olives, and Allium cepa L. species. A. cepa L. roots were treated with different doses of ferrous gluconate. The effective concentration EC50 (0.068 g/l) was determined. A. cepa root tips were treated with EC50/2 (0.034 g/l), EC50 (0.068 g/l), 2XEC50 (0.136 g/l) dose for 24, 48, 72 hours, and afterward, the root tips were prepared for observation under the light microscope according to the method of preparing mitotic preparation. Chromosomal abnormality index (CAI) and genotoxic effect of ferrous gluconate in A. cepa root tip cells were determined. Repeated measurement ANOVA and TUKEY multiple comparison tests were used to investigate the effect of time and dose together on genotoxicity. C-mitosis, polyploidy, polar shifting in anaphase, polar shifting in telophase, equatorial plate shifting, laggard chromosome was observed by microscope. The highest CAI (70.16±4.85) was observed at 72h for 2XEC50 dose. Chromosomal aberration is also observed in control group. While the most common chromosomal aberration is determined as C-mitosis; The least observed chromosomal aberration is determined as polyploidy. Research results revealed that ferrous gluconate has a genotoxic effect on the root tip of A. cepa.
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