Technical, Science and Applied SciencesКыргызско-Турецкий университет «Манас» Коллекция учреждения

Water is an effective additive to fuel oil to reduce the concentration of soot in the gas phase

Mirlan MOLDOBAYEV | Kubat KEMELOV | Zarlık MAYMEKOV

Soot is one of the products of incomplete combustion of hydrocarbon fuels. It has the property of adsorption of active and carcinogenic substances on the surface of soot particles. In this regard, in burner equipment of medium and small power, it is required to develop and implement effective environmental measures to reduce emissions of soot particles. In this paper, the fuel oil-water-air system at a wide temperature range (T500-3000K) was studied and the ratio of gas-liquid flows (water content in fuel oil 5-15) at the maximum entropy of the system and the formation of soot in flue gases wa ...Более

Статья 2022 Mühendislik Fakültesi MANAS Journal of Engineering (MJEN)10 ( 2 ) 77 Просмотры

Ultrasound-assisted photocatalytic decomposition of rifadin with biochar and CNT-based NiCr layered double hydroxides

Mehmet KOBYA

Modification of layered double hydroxides (LDHs) is known to be beneficial for boosting the consistent formation of reactive oxygen species (ROSs) and enhancing the photocatalytic process. Herein, a facile synthesis method for preparing carbon nanotube (CNT) and biochar (BC)-based NiCr LDH (NC) nanocomposites as a sonophotocatalyst for the efficient degradation of rifadin (RA) was provided. The formation of thin nanosheet structures of NC along with porous and nanotube structures of BC and CNT was well approved by scanning electron microscope (SEM) and high-resolution transmission electron mic ...Более

Статья 2023 Mühendislik Fakültesi Surfaces and Interfaces36 54 Просмотры

A techno-economical assessment of treatment by coagulation-flocculation with aluminum and iron-bases coagulants of landfill leachate membrane concentrates

Mehmet KOBYA

Landfill leachate treatment involved with the membrane bioreactor (MBR) combined with membrane treatment via nanofiltration (NF) and/or reverse osmosis (RO) is widely used in Turkey. This treatment produces landfill leachate membrane concentrates (LLMCs) with an undesirably high concentration of contaminants. In the study, two different nanofiltration concentrates of leachate were coagulated. Coagulant dosages from 0.10 to 5.0 g of Me3/L (Me3: Al3 or Fe3), and the pH values ranged from 4.0 to 8.0 and 3.0-9.0 for Al-based and Fe-based coagulants, respectively. The most efficient pH values were ...Более

Статья 2023 Mühendislik Fakültesi Chemosphere314 75 Просмотры

Perfluorooctanoic acid (PFOA) removal from real landfill leachate wastewater and simulated soil leachate by electrochemical oxidation process

Mehmet KOBYA

Poly and perfluoroalkyl compounds (PFASs) are a group of chemicals that are widely used and are difficult to purify. Within this group, perfluorooctanoic acid (PFOA), known for its highly polar and strong carbon-fluorine bonds, is a frequently encountered species in surface water, drinking water, and groundwater. In this study, we investigated the efficiency of electrooxidation (EO) in PFOA removal, optimization of EO parameters, and groundwater simulation in a realistic scenario. The EO optimization experiments were performed with a boron-doped diamond (BDD) anode for different values of pH, ...Более

Статья 2022 Mühendislik Fakültesi Environmental Technology & Innovation28 46 Просмотры

AMINO ACID COMPOSITION AND SOME PHYSICOCHEMICAL PARAMETERS OF MULTI-FLORAL HONEY FROM MOUNTAINOUS REGIONS OF KYRGYZSTAN = Kırgızistan'ın Dağlık Bölgelerinden Elde Edilen Polifloralı (Çok Çiçekli) Balın Amino Asit Bileşimi ve Bazı Fizikokimyasal Parametreleri

Ayçürök MACİTOVA

Mountain animal food products are at the center of attention due to their intrinsic value and, as such, mountain beekeeping products deserve attention and effort for their valorisation. The work aimed at investigating the quality traits of mountain honey samples from Kyrgyzstan, giving particular emphasis on the amino acid profiles and their possible relationship with the other chemical-physical characteristics. The moisture content, acidity, pH, and diastase activity of honey samples were within the limits established by normative documents. The honey samples showed a higher diastase activity ...Более

Статья 2022 Mühendislik Fakültesi Uludağ Arıcılık Dergisi22 ( 2 ) 53 Просмотры

Arsenic Removal by Electrocoagulation

Mehmet KOBYA

Because of the toxic impacts on human health, the arsenic (As) limit value in drinking water was decreased from 50 to 10 μg l −1 by the relevant authorities (WHO 1993; US EPA 2001). In this case, the problem of As pollution in natural water resources used for drinking water has grown even more and turned into a global crisis. According to reports in many parts of the world, over about 230 million people appear to be affected by high arsenic concentrations in groundwater. In this case, it turned out that there was a great need for cost-effective and environmentally friendly technologies from dr ...Более

Глава книги 2022 Mühendislik Fakültesi Arsenic in Plants: Uptake, Consequences and Remediation Techniques 13 Просмотры

Broadband, Stable, and Noniterative Dielectric Constant Measurement of Low-Loss Dielectric Slabs Using a Frequency-Domain Free-Space Method

Mehmet ERTUĞRUL

A broadband, stable, and noniterative free-space method is proposed for dielectric constant ε′r determination of low-loss dielectric slabs from reflection-only measurements through simple calibration standards (reflect and air). It is applicable for dispersive samples and does not require thickness information. Simulations of nondisperive and dispersive samples are performed to validate our method. Dielectric constant measurements of polyethylene and polyoxymethylene samples (9–11 GHz) are carried out to examine the accuracy of our method.

Статья 2022 Mühendislik Fakültesi IEEE Transactions on Antennas and Propagation70 ( 12 ) 65 Просмотры

Chemical Composition and Antioxidant Activity of Sea-Buckthorn (Hippophae rhamnoides L.) Grown in Issyk-Kul Region, Kyrgyz Republic

Aygül USUBALİYEVA | Nurzat TOTUBAYEVA

The fruit of sea-buckthorn (Hippophae rhamnoides L.) is a rich source of nutrients and phytochemicals. This study determined the chemical composition and antioxidant activity of sea-buckthorn grown in Issyk-Kul region, Kyrgyz Republic, during maturation from August to November. Three different assays [ferric reducing antioxidant power (FRAP), DPPH radical scavenging activity (DPPH), and cupric ion reducing antioxidant capacity (CUPRAC)] were used to determine the antioxidant activity of sea-buckthorn fruits. Sea-buckthorn fruits had a sugar content of 6.57-8.08 g/100g, a dietary fiber content ...Более

Статья 2022 Mühendislik Fakültesi Akademik Gıda20 ( 4 ) 53 Просмотры

Close link between Fabry–Pérot resonance and natural-resonance frequencies

Mehmet ERTUĞRUL

Mathematical and numerical analyses have been performed to examine the close link between Fabry–Pérot resonance and natural-resonance frequencies. For the mathematical analysis, the conditions resulting in minimum magnitudes of reflection coefficients in frequency-domain are derived for air-backed and metal-backed low-loss non-dispersive (or weakly dispersive) dielectric samples with relative complex permittivity εr and thickness L for free-space wave propagation at normal incidence. The close relation between Fabry–Pérot resonance and natural-resonance frequencies is demonstrated for three di ...Более

Статья 2023 Mühendislik Fakültesi Waves in Random and Complex Media ( Published online: 23 Jan 2023 ) 48 Просмотры

E-Government Development in the Central Asian States: Best Practices, Challenges and Lessons Learned

Ulan BRİMKULOV | Kasım BARIKTABASOV

Many states of the world are developing e-government to raise operating efficiency, better service delivery to citizens, and reduce corruption. But successful development of e-government depends on many factors, such as the level of economic development, the development level of the Information and Communications Technology (ICT) infrastructure, the ICT literacy of citizens, legal framework, political leadership etc. This chapter attempts to confirm this statement using the example of the Central Asian states. The chapter also describes best practices, main challenges and obstacles, and lesson ...Более

Глава книги 2017 Mühendislik Fakültesi International E-Government Development: Policy, Implementation and Best Practice 12 Просмотры

Impact of Kara-Keche lignite mining on the Kara-Keche River water composition and properties = Влияние разработки Кара-Кечинского буроугольного месторождения на состав и свойства вод реки Кара-Кече

Kanatbek KOCOBAYEV | Nurzat TOTUBAYEVA | Nurzat ŞAYKİYEVA

On the evidence of the earlier research findings, as well as the full-scale and lab-scale test data of 2019–2020, this article describes the ecological situation at Kara-Keche lignite field being developed by five mining companies in the Jumgal district of the Naryn Region in the Kyrgyz Republic. It is found that the field development proceeds with insufficient adherence to legal documents and has a considerable adverse influence on the environment and water bodies. Many large-volume refuse dumps have no isolation from natural water bodies, which ends with acute pollution of the latter. Contam ...Более

Статья 2022 Mühendislik Fakültesi Горный журнал / Gornyi Zhurnal ( 12 ) 132 Просмотры

Innovative technologies in educational process of teaching computer graphics

Zamirgül KAZAKBAYEVA

The purpose of this article is to show the importance of the application and use innovative technologies in educational process. This article considers the problems of teaching 2D- and 3D-computer graphics technologies in the higher educational institutions. Support of independent works of students for project creation. The paper also presents personal original video tutorials developed in the Kyrgyz-Turkish University Manas and shares the experience of video lessons creation. However, one of the main problems at secondary schools and higher educational institutions is the lack of video lesson ...Более

Статья 2017 Mühendislik Fakültesi Turkish Online Journal of Educational Technology ( Special Issue ) 50 Просмотры

Детальный поиск

Фильтры

Коллекция [1]

Ученые [35]

Устойчивое развитие ООН [17]

Факультет / Институт [1]

Вид публикации [6]

Год публикации [19]

Язык [4]

Источник [35]

Базы данных [33]

Вид индекса [10]

Вид индекса 2 [3]

Издатель [35]

Кафедра [7]

Национальный/Международный [2]

Тематический рубрикатор [35]

Mirlan MOLDOBAYEV | Kubat KEMELOV | Zarlık MAYMEKOV

Mehmet KOBYA

Mehmet KOBYA

Mehmet KOBYA

Ayçürök MACİTOVA

Mehmet KOBYA

Mehmet ERTUĞRUL

Aygül USUBALİYEVA | Nurzat TOTUBAYEVA

Mehmet ERTUĞRUL

Ulan BRİMKULOV | Kasım BARIKTABASOV

Kanatbek KOCOBAYEV | Nurzat TOTUBAYEVA | Nurzat ŞAYKİYEVA

Zamirgül KAZAKBAYEVA