Browsing by Author "Okut, N."

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Agricultural Wastewater Treatment and Reuse Technologies: a Comprehensive Review
(Elsevier Ltd, 2025) Okut, N.; Hamzat, A.K.; Rajakaruna, R.A.D.N.V.; Asmatulu, E.
Agricultural activities generate substantial volumes of wastewater, characterized by diverse chemical, physical, and biological contaminants. Effective treatment and reuse of this wastewater are crucial for environmental sustainability and resource conservation. This comprehensive review explores the spectrum of technologies employed in agricultural wastewater treatment and reuse. It begins with an overview of agricultural wastewater, detailing its sources, composition, and impacts on health and the environment. The review then examines conventional treatment methods, including physical, chemical, and biological approaches, followed by an analysis of advanced technologies such as membrane processes, advanced oxidation, and electrochemical treatments. Integrated treatment systems, which combine multiple methods to enhance efficiency and effectiveness, are also discussed, with examples and case studies provided. The potential applications of treated wastewater, particularly in irrigation, industrial processes, and groundwater recharge, are highlighted to underscore the value of reuse. The review identifies key challenges in the sector, including technical, economic, regulatory, and social barriers. Future trends and research directions are proposed, emphasizing the importance of emerging technologies, sustainability, and integration with smart farming practices. By synthesizing current knowledge and identifying gaps, this review aims to guide policy, practice, and future research in agricultural wastewater treatment and reuse. © 2024
Alleviation of Salinity Stress During Seed Germination in Wheat (Triticum Aestivum) by Potassium Applications
(indian Counc Agricultural Res, 2007) Yagmur, M.; Kaydan, D.; Okut, N.
Chemical Composition and Antibacterial Activities of Juniperus Horizontalis Essential Oil
(Canadian Science Publishing, Nrc Research Press, 2014) Eryigit, T.; Okut, N.; Ekici, K.; Yildirim, B.
In recent years, the screening of antibacterial activity has been the subject of much research, and the antibacterial activity of essential oils could be a promising subject for future investigation. In this study, the antibacterial activities of Juniperus horizontalis essential oils and their components were investigated. Essential oils were isolated using the hydro-distillation method and their components were analyzed by gas chromatography-mass spectrometry (GC-MS). The main compounds found in the oil of leaves were linalool (33.76%), P-cymene (23.20%), gamma-terpinene (8.67%), trans-sabinene hydrate (8.59%), thyme camphor (8.49%), carvol (5.08%) and borneol (4.22%). Juniperus horizontalis essential oils were evaluated for antibacterial activity against six bacterial strains using the disc diffusion method. The results indicate that the essential oil of J. horizontalis shows variable and significant antibacterial activities against the six tested bacteria species. The diameters of the inhibition zones formed for bacteria were measured. The lowest inhibition zone was 12 mm (sensitive) against Pseudomonas aeruginosa ATCC 10145 and the highest zone was 32 mm (extremely sensitive) against Enterococcus faecalis ATCC 29212.
Chemical Composition and Antibacterial Activities of Juniperus Horizontalis Essential Oil (Vol 94, Pg 323, 2014)
(Canadian Science Publishing, Nrc Research Press, 2018) Eryigit, T.; Okut, N.; Ekici, K.; Yildirim, B.
Chemical Variation on the Essential Oil of Thymus Fedtschenkoi (Ronniger)
(Centenary University, 2018) Okut, N.
The genus Thymus belongs to family Lamiaceae. It is perennial, aromatic herbs and subshrubs. The rate and main components of essential oil from aerial parts of Thymus fedtschenkoi (Ronniger) were investigated in this study. Samples of the T. fedtschenkoi were collected from five altitudinal populations at Easthern part of Turkey (Van) at flowering stage from natural habitats. Samples were collected from five different locations and the essential oils isolated by hydro distillation from the aerial parts were analysed by gas chromatography-mass spectrometry (GC-MS). After quantified the essential oils, Thymol, 1,8-Cineole, Linalool and Thymene were found to be major constituent. The amount of Linalool, 1,8-Cineole, Thymol, and Thymene ranged from 50.08-73%, 5.39-23.53%, 19.13-27.81% and 10.48-16.22%, respectively. The results obtained from this study contributed to determine the chemical structure as well as the quality of consumption of the Thymus fedtschenkoi (Ronniger) plants for the study area. © 2018, Centenary University. All rights reserved.
The Effects of Maxicrop Leaf Fertilizer on the Yield and Quality of Soybean (Glycine Max L. Merril)
(Academic Journals, 2008) Yildirim, B.; Okut, N.; Türközü, D.; Terzioǧlu, Ö.; Tunçtürk, M.
The aim of this study which was conducted in the summer of 2001 on the trial fields of Van YYU (Yüzüncü Yil University) was to determine the effects of Maxicrop leaf fertilizer, applied on Beason soybean at various stages, on the yield and yield components. Maxicrop doses of 500, 1000 and 1500 g.ha-1 per hectare were applied at three different stages of the plant (seed stage, four-leaf stage and "beginning of blooming" stage). The highest plant height was achieved as 32.98 cm on average from 2000 g.ha-1 dose. No difference was recorded between the applications in terms of 1000 seed weight. The values of 1000 seed weight varied between 134.25-144.25 g on average. Application doses lead to an increase in seed yield. The highest seed yield value was achieved as 1265.7 kg. ha-1 from 2000 g.ha-1 dose while the lowest seed yield was achieved as 997.3 kg. ha-1 from the control dose. © 2008 Academic Journals.
Identification of Chemical Composition and Antibacterial Properties Juniperus Oxycedrus L. Subsp. Oxycedrus Leaf Essential Oil
(Centenary University, 2018) Okut, N.; Yildirim, B.; Ekici, K.; Terzioğlu, Ö.; Özgökçe, F.
The constituents of leaf essential oil of Juniperus oxycedrus L. subsp. oxycedrus (JOO) from wild flora of Gevas-Van in Turkey (Mount Artos) were studied using Gas Chromatography-Mass Spectrometry (GC-MS) and their antibacterial activities were assessed. A total of 18 compounds representing 99.98% of leaves oil were identified. The oils of the plant are all dominated by monoterpenes. The main compounds of essential oil in leaves were Limonene (45.77%), α-Pinene (23.94%), β-Phellandrene (10.83%), β-Pinene (5.68%), o-Cymene (3.30%), respectively. The essential oils were tested against Staphylacoccus aureus, Bacillus subtilis, Pseudomanas aeruginosa, Enterecoccus faecalis, Salmonella typhimurium, and Escherichia coli strains using the disc diffusion method. The diameter of the inhibition zones formed for bacteria were measured. The essential oils of JOO found to be active against all of the tested microorganisms and showed the susceptible inhibition zones. However, they were not as much as effective against bacterial strains when compared to ampicillin and ofloxacin. The extracts of JOO showed most significant antibacterial activity against Escherichia coli with inhibition zone diameter of 15 mm. The lowest inhibition zone diameter was Staphylococcus aureus with 11 mm. © 2018, Centenary University. All rights reserved.