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UN Sustainable Development : Life below water ✕
Collection [3]
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UN Sustainable Development [7]
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Subject Headings [35]
Life below waterConserve and sustainably use the oceans, seas and marine resources for sustainable development
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No Evidence of an Elevation Effect Caused by Temperature Differences on Soil Microbial Properties in a Walnut Fruit Forest in Kyrgyzstan

Cıldız ÖSKÖNBAEVA

This study is to investigate the effect of differences in annual average temperature on soil microbial communities as caused by elevation in walnut-fruit forests in Kyrgyzstan with similar vegetation. Soil samples (n 10 per site) were collected from top- and subsoil at three elevation levels (1000, 1300 and 1600 m above sea level) with an average temperature difference of 1.3 °C between sites and analysed for soil chemical and biological properties. All soil properties showed high variability within, but most revealed no differences between elevation levels. Microbial biomass, activity and com ...More

Article 2023 Mühendislik Fakültesi Journal of Soil Science and Plant Nutrition23 ( 2 ) 39 Views
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Solitary wave solutions to some nonlinear conformable partial differential equations

Ercan ÇELİK

Fractional calculus is a field that is currently used in the world’s applications in many science and engineering fields where many models are still being developed and researched. The conformable time-fractional gives the full history of this function, which is the advantage of using fractional calculus to solve physical problems. In this study, the conformable time-fractional extended (2  1)-dimensional quantum Zakharov-Kuznetsov and the time-fractional modified Korteweg-de Vries equations are investigated by using the the modified exp (−Ω(ξ))-expansion function approach. Some new prototype ...More

Article 2023 Fen Fakültesi Optical and Quantum Electronics55 ( 8 ) 23 Views
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On Survey of the Some Wave Solutions of the Non-Linear Schrödinger Equation (NLSE) in Infinite Water Depth

Ercan ÇELİK

In this work, we use two different analytic schemes which are the Sine-Gordon expansion technique and the modified exp -expansion function technique to construct novel exact solutions of the non-linear Schrödinger equation, describing gravity waves in infinite deep water, in the sense of conformable derivative. After getting various travelling wave solutions, we plot 3D, 2D and contour surfaces to present behaviours obtained exact solutions. Keywords: the sine-gordon expansion technique; the modified exp -expansion function technique; conformable derivative, non-linear schrödinger equation (NL ...More

Article 2023 Fen Fakültesi Gazi University Journal of Science36 ( 2 ) 35 Views
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The integration of millet into the diet of Central Asian populations in the third millennium BC

Kubatbek TABALDİYEV

Stable isotope analyses demonstrate that C-4 plants played an important dietary role in Eurasian prehistory. Uncertainty remains, however, about when and how crops were integrated into the diet of Central Asian populations. Here, the authors present delta C-13 and delta N-15 stable isotope analysis of human and animal bone collagen from Kyrgyzstan, revealing C-4 plant-likely broomcorn miller-consumption in the third millennium BC. Combining this evidence with AMS radiocarbon dating and animal collagen peptide fingerprinting demonstrates that broomcorn millet was consumed by humans and animals ...More

Article 2022 Edebiyat Fakültesi Antiquity96 ( 387 ) 91 Views
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Carbon and oxygen stable isotopic evidence for diverse sheep and goat husbandry strategies amid a Final Bronze Age farming milieu in the Kyrgyz Tian Shan

Kubatbek TABALDİYEV

The mountains of Central Asia during the Bronze and Iron Ages are increasingly being reconceived as an important zone for intensive crop cultivation in combination with pastoralist herding. However, very little information is known about how farming practices intersected with livestock husbandry, especially at high-elevation sites. This paper presents the first insights to ancient animal management strategies in the Tian Shan through incremental carbon and oxygen stable isotope analysis of domesticated caprine teeth recovered from the Chap-1 farmstead located at 2000 m.a.s.l. in Kyrgyzstan (10 ...More

Article 2022 Edebiyat Fakültesi International Journal of Osteoarchaeology32 ( 4 ) 162 Views
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On the new hyperbolic wave solutions to Wu-Zhang system models

Ercan ÇELİK

In this study, some solitary wave solutions of the Wu-Zhang system are analyzed using the modified expansion function method and the sine-Gordon expansion method. Solitary wave solutions of this non-linear mathematical model consisting of hyperbolic and trigonometric function structures are get. Two and three dimensional, density graphics of the solitary solutions of the mathematical models are drawn by choosing the appropriate parameters. It was seen that all solution functions found as a result provide the mathematical model. In this study, Wolfram Mathematica software program was used for a ...More

Article 2022 Fen Fakültesi Optical and Quantum Electronics54 ( 5 ) 123 Views
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Complex solutions to the higher-order nonlinear boussinesq type wave equation transform

Ercan ÇELİK

The higher-order nonlinear Boussinesq type wave equation describes the propagation of small amplitude long capillary-gravity waves on the surface of shallow water. Mathematical physics, shallow water waves, fluid dynamics, and fluid movement are all examples of this model. To acquire exact solutions in the form of solitary wave and complex functions solutions, we use the (m 1/G')-expansion method. These results aid mathematicians and physicians in comprehending the model's physical phenomena. This approach may be employed on different models in order to generate whole new solutions for nonline ...More

Article 2022 Fen Fakültesi Ricerche di Matematica ( Published online: 06 May 2022 ) 42 Views
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Ecological Assessment of Technogenically Disturbed Soils of the Mountain Ecosystems of Kyrgyz Republic Based on the TRIAD Method

Nurzat TOTUBAYEVA | Kanatbek KOCOBAYEV | Aygül USUBALİYEVA | Ciyde TOKPAEVA

Comprehensive studies of soil contamination were performed in the area of settlement Kichi-Kemin (Kyrgyz Republic). Soils of the Kyrgyz Republic are exposed to waste (tailings) of many industrial enterprises of the mining industry not far from the village of A k-Tuz, located 145 km from the capital of Kyrgyz Republic, Bishkek, at an altitude of 2300 m above sea level. It is noted that 4.17 million tons of radioactive waste from one of the enterprises were once disposed of at four tailings in the Kichi-Kemin Valley. The main waste elements are radioactive thorium, heavy metals such as cadmium, ...More

Article 2022 Mühendislik Fakültesi Polish Journal of Environmental Studies31 ( 3 ) 63 Views
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Microbiological Diversity and Biotechnological Potential of the Soil Ecosystem of a High-Mountainous Landfill

Nurzat TOTUBAYEVA | Kanatbek KOCOBAYEV | Ciyde TOKPAEVA

Strains isolated from high mountain industrial landfills have high biotechnological potential and studying their diversity is relevant. The objective of this study was to investigate the microbial diversity of oil-contaminated soils at a high mountain mine located 4000 meters above sea level, isolated and characterized by hydrocarbon-resistant bacteria and compare the degradation efficiency of two bacterial consortia. The surface layer (0-30 cm) that consists of 10440 mg/kg hydrocarbons were used for the experiment. A bacteria group of the three genera Pseudomonas, Flavobacterium, and Rhodococ ...More

Article 2019 Mühendislik Fakültesi Polish Journal of Environmental Studies28 ( 6 ) 92 Views
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Phosphorous removal from anaerobically digested municipal sludge centrate by an electrocoagulation reactor using metal (Al, Fe and Al-Fe) scrap anodes

Mehmet KOBYA

Phosphates are a major cause of eutrophication and growth of algal blooms in surface waters. The current study investigated phosphorus removal from sludge centrate effluent (SCE) of a municipal wastewater plant by packed-bed electrocoagulation (EC) reactor. Distinctively, iron (Fe), aluminum (Al) and Al-Fe hybrid scrap anodes were used. The influence of initial pHi, applied current and packed anode bed density were evaluated. Phosphorous removal efficiency of 99.99 ?as obtained at applied current of 0.20A with anode bed densities of 0.18 kg Al/m3 (pHi 5.0) and 0.48 kg Fe/m3(pHi 7.0). Optimum o ...More

Article 2021 Mühendislik Fakültesi Process Safety and Environmental Protection152 69 Views
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A case study performed in Kucukcekmece Lagoon channel/Istanbul, Turkey: how the heavy metal contamination and the seasonal variations on phytoplankton composition influence water quality

İbrahim İlker ÖZYİĞİT

In this work, the experiments related to seasonal variations of phytoplankton composition and heavy metal contamination along with some water quality parameters were carried out throughout the channel, serving as a waterway between Lake Kucukcekmece and the Sea of Marmara. Considered as a Class B wetland, the lake has been stayed within the metropolitan area of Istanbul overtime. The samples from the surface water were taken monthly by using Nansen bottles at 5 sampling sites through the period of March-November. After experimental procedures, a total of 46 taxa were recorded belonging to Baci ...More

Article 2021 Fen Fakültesi Desalination and Water Treatment239 100 Views
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The first combined archaeological and archaeometric analyses on Bronze Age pottery from Kyrgyzstan (Uch Kurbu site)

Kubatbek TABALDİYEV

The integration of the Bronze Age populations in Kyrgyzstan into the Andronovo sphere is largely based on the resemblance of the ceramic material discovered at the Kyrgyz sites with the pottery from various Andronovo sites, which has been explained by human migrations. However, very few detailed pottery studies have been conducted, and no archaeometric analyses have been applied to date to the material from Kyrgyzstan. We present a first investigation on Bronze Age pottery from Uch Kurbu (Kyrgyzstan) through a combined archaeological (field-based stylistic and macroscopic examinations) and arc ...More

Article 2020 Edebiyat Fakültesi Journal of Archaeological Science: Reports31 125 Views
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