IYTE GCRIS Database (Izmir Institute of Technology)
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Virtually Regular Modules
No full textIn this paper, we call a right module M (strongly) virtually regular if every (finitely generated) cyclic submodule of M is isomorphic to a direct summand of M. M is said to be completely virtually regular if every submodule of M is virtually regular. In this paper, characterizations and some closure properties of the aforementioned modules are given. Several structure results are obtained over commutative rings. In particular, the structures of finitely presented (strongly) virtually regular modules and completely virtually regular modules are fully determined over valuation domains. Namely, for a valuation domain R with the unique nonzero maximal ideal P, we show that finitely presented (strongly) virtually regular modules are free if and only if P is not principal; and that P = Rp is principal if and only if finitely presented virtually regular modules are of the form R-n circle plus (R/Rp)(n)(1) circle plus (R/Rp(2))(n)(2) circle plus center dot center dot center dot circle plus (R/Rp(k))(n)(k) for nonnegative integers n, k, n(1), n(2),...,n(k). Similarly, we prove that P = Rp is principal if and only if finitely presented strongly virtually regular modules are of the form R-n circle plus (R/Rp)(m), where m,n are nonnegative integers. We also obtain that, R admits a nonzero finitely presented completely virtually regular module M if and only if P = Rp is principal. Moreover, for a finitely presented R-module M, we prove that: (i) if R is not a DVR, then M is completely virtually regular if and only if M congruent to( R/Rp)(m); and (ii) if R is a DVR, then M is completely virtually regular if and only if M congruent to R-n circle plus ( R/Rp)(m). Finally, we obtain a characterization of finitely generated virtually regular modules over the ring of integers
Nitrate Sensing With Molecular Cage Ionophores: a Potentiometric Approach
No full textNitrate ions are widespread environmental pollutants in water and soil, posing critical risks to both human health and ecosystems. This study introduces a molecular cage as a novel ionophore for potentiometric nitrate-selective ion-selective electrodes (ISEs) designed for enhanced specificity and sensitivity. Among six synthetic candidates, the electrode incorporating a 1,3,5-tri(p-hydroxyphenyl)benzene-based chlorotriazine pillared cage molecule (CAGE-1) exhibited superior performance, characterized by a linear response in the nitrate concentration range of 1.0 x 10-5 to 1.0 x 10-1 M, with a high coefficient of determination (R2 = 0.9971) and a slope of -53.1 +/- 1.4 mV dec-1. The electrode also achieved a limit of detection of 7.5 x 10-6 M. These findings highlight the potential of molecular cages as ionophores for nitrate sensing in environmental applications
Synthesis, Characterization, Crystal Structure, Electrochemical and Photoluminescence Properties, Dft and Molecular Docking Studies, and Antimicrobial Activities of Two Mononuclear Nickel (II) Complexes With Pyrazole-Derived Ligands
No full textTwo octahedral nickel complexes; [Ni(fdtp)2(DMF)2] (1) and [Ni(dcdtp)2(DMF)2] (2), based on 4-((3-fluorophenyl)diazenyl)-3-(trifluoromethyl)-1H-pyrazol-5-ol (fdtp) and 4-((2,4-dichlorophenyl)diazenyl)-3-(trifluoromethyl)-1H-pyrazol-5-ol (dcdtp) were synthesized. The complexes were characterized spectroscopically (FTIR, UV-Vis, Photoluminescence), Mass spectrometry, elemental analyses, electrochemically, thermally, and through Single-crystal X-ray investigations. The formation of the complexes was confirmed by the existence of Ni-O and Ni-N vibrations at bonds were observed as weak bands at 526-497 and 470-438 cm-1. According to the thermogravimetric analyses, the complexes were thermally stable and had relatively high activation energies (585.81 and 730.07 kJ mol-1 for 1, and 2, respectively). Cyclic voltammograms showed that the anodic potential region of 1 and 2 exhibited two irreversible oxidation peaks at 1.34 V ;1.55 V and 1.41 V ; 1.63 V, respectively, attributed to metal-localized oxidation. The complexes showed enhanced antibacterial activities compared to free ligands and comparable to the standard. The inhibition zones exhibited via 1 were about 21.7, 19.3, and 26.7 mm versus Escherichia coli (E. coli), Staphylococcus aureus (S. Aureus), and Bacillus Subtits (B. Subtits), respectively. Docking studies supported the antibacterial investigations; the binding energies of the complexes were -8.81 and -9.69 kcal/mol for 1 and 2 respectively, against E. coli (PDB ID: 6F86)
A New Electro-Biomembrane Integrated Renewable-Based System To Produce Power, Fresh Water and Hydrogen for Sustainable Communities
No full textAs the consequences of global warming become more severe, it is more crucial than ever to capitalize on all locally accessible potential renewable energy sources and produce sufficient useable energy outputs to meet community demands while causing the least damage to the ecosystem. Therefore, this paper focuses on a unique parabolic trough collector solar system-powered electro-biomembrane unit that combines a heat and power system with fresh water, electricity and hydrogen production. The proposed integrated system contains the following subsystems: a combining parabolic trough collector solar system, an organic Rankine cycle, a steam Rankine cycle, a multi-stage flash desalination system, and an electro-biomembrane H2 and freshwater production system. A thorough analysis and parametric research are performed on the multigeneration system to determine how important characteristics affect system performance and evaluate the energy and exergy efficiencies, and exergy destruction levels for particular system elements. The study results show that solar irradiation is the most critical parameter for improving system performance. The highest freshwater production of 1,303,333.3 L/day is observed at the solar irradiation of 935,768 kWh/day. Furthermore, the combined output of three electricity production technologies exceeds 2,000,000 kWh/day, highlighting the ability of the system to harness solar thermal energy effectively. The study findings indicate that using solar power and biomass as renewable energy sources, the proposed integrated system provided 328.56 kg of biohydrogen per day. Overall, the energy and exergy efficiencies of the integrated system are obtained as 34.3 and 29.5 %, respectively
Light-Emitting Diodes: Mechanism of Inactivation of Microorganisms and Effects on Different Microorganisms
No full textUV lights are widely used for surface disinfection, sterilization of water, and various liquid foods. The usage of light-emitting diodes (LEDs) has become prominent as a light source for sterilization and decontamination of materials. LEDs have been widely investigated for water treatment. However, there are limited studies on the use of LEDs for food materials due to their low light transmittance capabilities. To develop the most effective treatment for sterilization and decontamination purposes in food processing, it is necessary to know what the different microbial inactivation mechanisms of LEDs are and what their limitations are for use. This chapter includes discussions on the microbial inactivation efficiency of light-emitting diodes (LEDs) of different wavelengths; and the inactivation mechanisms of various microorganisms (such as bacteria, viruses, molds, algae, and yeast). © 2025 by Apple Academic Press, Inc
21st Century Urban Aesthetics in the Post Critical Age: Sanart Publication
No full textThis research problematized the relationship between human and the built environment in the 21st century, which it describes as post-critical, and examined the relationship between them in a theoretical framework through aesthetics. Within this framework, it has analyzed selected articles from the proceedings book published by SANART (Association of Aesthetics and Visual Arts). This study has defined aesthetics as a way of relating human beings to their environment. It redefined holistic aesthetic thought through approaches that focus on uncertain, porous, relational boundaries and social processes. With new perspectives that reject the dualism of subject and object, the process associated with the concepts of movement and becoming have been conceptualized through the process of urban experience from the perspective of Manuel DeLanda. This study has analyzed the urban discourses presented in SANART publications with a focus on ’movement’. It has interpreted these movements as a feature of the built environment as it is shaped by the capacities of bodies and space. It has argued that a movementoriented evaluation of urban aesthetics would further the development of the critical field. © 2025, Istanbul Teknik Universitesi, Faculty of Architecture. All rights reserved
Construction of the Living Networks in Artificial Tissues: Vascularization in Tissue Engineering
No full textVibrational Spectroscopy in Plant-Based Protein Research: Quantification and Structural Analysis
No full textBackground: Plant-based proteins are gaining importance in food science, biotechnology, and human health as sustainable and nutrient-rich alternatives to animal-derived proteins. The rising demand for plant-based foods, driven by environmental concerns and dietary shifts, has intensified research into plant protein sources. Accurate determination of protein content and structure is essential for ensuring the nutritional quality, optimizing functionality, and maintaining product consistency. Traditional protein analysis methods, while effective, often require extensive sample preparation and time-consuming procedures. Vibrational spectroscopy, including Fourier-transform Infrared (FTIR), Near-Infrared (NIR), and Raman spectroscopy, offers a rapid, non-destructive, and efficient alternative for protein characterization in complex food matrices. Scope and approach: This review explores the application of vibrational spectroscopy in evaluating plant-based protein content and their secondary structure. It outlines the fundamental principles of FTIR, NIR, and Raman spectroscopy, emphasizing their advantages over conventional techniques. Key challenges, such as spectral overlap, water interference, and calibration requirements, are discussed alongside emerging solutions involving chemometric approaches, artificial intelligence, and hybrid analytical techniques. Key findings and conclusions: Vibrational spectroscopy provides precise protein quantification and structural analysis with minimal sample preparation. FTIR and Raman spectroscopy complement each other in protein conformation analysis, while NIR facilitates rapid bulk protein assessment. Advances in computational methods are enhancing spectral interpretation and accuracy. Integrating vibrational spectroscopy with complementary techniques can further improve protein characterization, supporting the development of high-quality, sustainable plant-based protein sources for food and biotechnology applications
Water Supply Systems: Past, Present Challenges, and Future Sustainability Prospects
No full textAt the beginning of human history, surface water, especially from rivers and springs, was the most frequent water supply source. Groundwater was used in arid and semi-arid regions, e.g., eastern Crete (Greece). As the population increased, periodic water shortages occurred, which led to the development of sophisticated hydraulic structures for water transfer and for the collection and storage of rainwater, as seen, for example, in Early Minoan times (ca 3200-2100 BC). Water supply and urban planning had always been essentially related: the urban water supply systems that existed in Greece since the Bronze Age (ca 3200-1100 BC) were notably advanced, well organized, and operable. Water supply systems evolved considerably during the Classical and Hellenistic periods (ca 480-31 BC) and during the Roman period (ca 31 BC-480 AD). Also, early Indian society was an amazing vanguard of technology, planning, and vision, which significantly impacted India's architectural and cultural heritage, thus laying the foundation for sustainable urban living and water resource management. In ancient Egypt, the main source of freshwater was the Nile River; Nile water was conveyed by open and closed canals to supply water to cities, temples, and fields. Underground stone-built aqueducts supplied Nile water to so-called Nile chambers in temples. The evolution of water supply and urban planning approaches from ancient simple systems to complex modern networks demonstrates the ingenuity and resilience of human communities. Many lessons can be learned from studying traditional water supply systems, which could be re-considered for today's urban sustainable development. By digging into history, measures for overcoming modern problems can be found. Rainwater harvesting, establishing settlements in proximity of water sources to facilitate access to water, planning, and adequate drainage facilities were the characteristics of ancient civilizations since the ancient Egyptian, Minoan, Mohenjo-Daro, Mesopotamian, and Roman eras, which can still be adopted for sustainability. This paper presents significant lessons on water supply around the world from ancient times to the present. This diachronic survey attempts to provide hydro-technology governance for the present and future
Kurumsal akademik arşiv uygulama planı
No full textDIRNA projesi kapsamında 24 Ocak 2025 tarihinde gerçekleştirilen toplantıda Repository implementation plan hakkında yapılan sunumdur