No abstract

No abstract

No abstract

The limitation of traditional sampling method to provide detailed spatial and temporal profiles of suspended sediment concentration has led to an interest in alternative devices and methods based on scattering of underwater sound and light. In the present work, acoustic backscatter and LISST (the Laser In Situ Scattering Transmissometry) devices, and methodologies were given. Besides a laboratory study was conducted to compare pumping methods for different sediment radiuses at the same concentration. The glass spheres (ballotini) of three different radiuses of 115, 137 and 163 μm were used to obtain suspension in the sediment tower at laboratory. A quite good agreement was obtained between these methods and pumping results with the range at 60.6-94.2% for sediment concentration and 91.3-100% for radius measurements. These results and the other studies show that these methods have potential for research tools for sediment studies. In addition further studies are needed to determine the ability of these methods for sediment measurement under different water and sediment material conditions.

Turbidity and acoustic measurement are alternative indirect methods to determine sediment concentration. Acoustic Doppler velocimetry can be used to estimate suspended sediment concentration (SSC) with the signal-to-noise ratio (SNR) in the water. In this study, particles size affecting turbidity and SNR values was investigated using four different sediment size groups (0–50, 50–100, 100–200, and 200–250 micron). The highest turbidity values were determined for small-sized sediment, and they decreased for bigger sediment size. Clay content decreased the relationship between sediment and turbidity and caused a reading error for high concentrations (>4 g.l−1). However, R2 values greater than 0.900 were obtained for all treatments (R2: 0.952, 0.992, 0.987, and 0.977, respectively, from small size to large size group). SNR values had good relationships with SSC values for less than 40 dB and 1 g.l−1 sediment concentrations (R2: 0.990, 0.998, 0.994, and 0.973, respectively, from small size to large size group). SNR values were strongly affected by small changes in sediment concentration but this property can be accepted as advantageous for sensitive measurement. As a result of this study, it could be concluded that turbidity and SNR values can be used for continuous sediment monitoring.

No abstract

Jüt bitkisi kozmetik, parfümeri, gıda ve ilaç gibi endüstrilerde kullanılan en önemli şifalı bitkilerden biridir. Bu çalışma 2019 yılında Jüt (Corchorus capsularis, Corchorus olitorius) türlerinin üretimi için gerçekleştirilmiş olup, bu türler Türkiye Bingöl'de üretilmiştir. Denemede 50 cm sıra aralığı ve 10 cm sıra üzeri uygulanmıştır. Her sıraya damla sulama sistemi kurulmuş ve bu sistemle kontrollü bir şekilde sulama yapılmıştır. Corchorus olitorius tohum üretti, ancak Corchorus capsularis tohum üretmemiştir. Her iki türdeki yaprak ve gövdelerin kimyasal bileşimleri GC-MS ile analiz edilmiş, GC-MS sonuçlarına göre Corchorus olitorius ve Corchorus capsularis türlerinin yaprak kısımlarında toplam 18 ve 20 bileşen tespit edilmiştir; Corchorus olitorius ve Corchorus capsularis türlerinin gövdelerinde sırasıyla toplam 11 ve 29 bileşen tespit edilmiştir. Yapraklarda ve gövdelerde literatür verilerinden farklı bileşenler tespit edilmiştir.

No abstract