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• Çevre Koruma Teknolojileri Bölümü

Araştırmacılar(4)

• Akar, Bülent
• Cevikbas, Mustafa
• Mazlum, Uğur
• Tekel, Muharrem

• MakaleAçık Erişim2026/r/gumushane/16308
  THREE LIVERWORT TAXA NEW TO AZERBAIJAN

  Erata, Huseyin; Ayhan, Edanur; Mammadova, Aygun Vidadi; Ibadullayeva, Sayyara; Batan, Nevzat

  The liverwort taxa Scapania calcicola, Barbilophozia hatcheri, and Porella cordaeana, are reported as new for Azerbaijan, following a recent bryological expedition to the Zagatala, Shabran and Astara of Azerbaijan. Brief descriptions, illustrations, geographic distribution, ecology and comparisons with morphologically similar species are presented.

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• MakaleAçık Erişim2026/r/gumushane/19410
  The Triple Relationship between Biofuel Production, Carbon Emissions and Economic Growth in Türkiye Using Time Series Analysis: A policy proposal based on algae in biofuel production

  Akar, Bülent; Akar, Sonay

  Purpose: Study aims to determine the causality relationship between production of biofuel, carbon emissions and economic growth between 2005 and 2022 in Türkiye. Findings: The findings show that there is a unidirectional causality relationship from biofuel production to carbon emissions in Turkey. Meanwhile, GDP was not found to be associated with any variable. Limitations: Access to regular and uninterrupted data on biofuel production in Turkey covers the period between 2005 and 2022. Therefore, this period was selected as the start and end years of the research, and the frequency range of the research was limited to 18 years. Originality/Value: Minimising the negative environmental impacts of production is becoming increasingly important. Because the decline in global reserves of fossil fuels and the greenhouse gas emissions indicate that is unsustainable of dependence on these energy sources. Consequently, it is coming to the agenda biofuels which are both renewable and carbon neutral among alternative energy sources. Biofuels based on plant oil, hydrogen, bioethanol or biodiesel can provide an improvement against fossil carbon emissions compared to fossil fuels such as petrol. Furthermore, the compatibility of biofuels with existing engine technology has increased interest in these resources both in scientific circles and in industrial investment areas. Study, the biofuels which are of economic and ecological importance considered to make a unique contribution to the field as a current study examining the interaction between carbon emissions and economic growth.

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• MakaleAçık Erişim2026/r/gumushane/13819
  Thermal Energy Storage Performance of EPCM-Impregnated Moss Biomass Placed in OKAL Chipboard for Use in Building Envelopes and Interior Space Separation

  Can, Ahmet; Erata, Hüseyin; Gencel, Osman; Erol, Tuğçenur Bayraktar; Sarı, Ahmet; Batan, Nevzat

  This study develops an innovative thermal energy storage approach for lightweight building systems by using eutectic phase change material (EPCM)-impregnated moss biomass (Cp/EPCM) in the internal voids of OKAL chipboard (OKS-Cp/EPCM). A high latent heat storage (LHS) capacity of 121.4 J/g was achieved with a 72% EPCM loading. Furthermore, the thermal conductivity of the OKS-Cp/EPCM decreased from 0.15074 W/m·K to 0.109 W/m·K. Thermal imaging results showed that the OKS-Cp/EPCM improved thermal comfort by reducing the surface temperature by approximately 10.5 °C in hot environments and providing an approximately 1 °C higher surface temperature in cold environments. However, TGA analyses revealed that the thermal resistance of the composite was limited. Relative humidity results also indicated that Cp/EPCM positively contributed to the moisture regulation performance of the board. Based on these results, OKS-Cp/EPCM offers a promising solution for the development of energy-efficient and thermally comfortable lightweight building elements.

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• MakaleYalnız künye2026/r/gumushane/13694
  Synthesis, antioxidant, and antiurease activities of novel benzimidazole-based 1,3,4-thiadiazole derivatives

  Gümrükçüoğlu, Taner İlker; Akgün, Hakan; Bektaş, Hakan; Sökmen, Bahar Bilgin; Menteşe, Emre

  In this study, we report the synthesis and characterisation of five new benzimidazole-based 1, 3, 4-thiadiazole derivatives (5a–e) and the evaluation of their antioxidant and antiurease activities. The structures were confirmed by NMR (1H, 13C) and LC/TOF–MS analyses (spectra are given in the supplementary information). Biological assays (DPPH, ABTS, iron-reducing power, urease inhibition) revealed that compound 5e (bearing a 4-nitrophenyl substituent) exhibited the strongest urease inhibition (EC50 = 0.1296 ± 0.0260 µM), surpassing thiourea. One-way ANOVA revealed significant differences in urease inhibition between the compounds (p<0.001). Post-hoc Tukey tests confirmed that compound 5e was more effective than several other compounds. The compounds exhibited moderate and comparable antioxidant activities. The first SAR study shows that electron-withdrawing substituents increase urease inhibition, whereas electron-donating groups increase the reducing power. Comparison with earlier reported triazole analogues shows scaffold-dependent changes in bioactivity. These findings support thiadiazoles as promising dual-function agents for oxidative stress and urease-associated pathologies.

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• MakaleYalnız künye2026/r/gumushane/13500
  New and noteworthy liverwort records for Türkiye and South-West Asia

  Erata, Hüseyin; Batan, Nevzat; Mamontov, Yuriy S.; Özdemir, Turan

  The liverwort taxa Cephaloziella elegans and Mesoptychia gillmanii are reported for the first time from Türkiye and Southwest Asia, based on a bryological field trip to the Karçal Mountains in the Caucasian region (Artvin). Additionally, Lophoziopsis excisa is recorded for the second time in Türkiye, with the newly discovered locality extending the known national distributions of this taxon. Descriptions, illustrations, data on world distribution and ecology, as well as comparisons with morphologically similar species, are provided.

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• MakaleYalnız künye2026/r/gumushane/12313
  Oncophorus integerrimus (Bryophyta) and Nardia pacifica (Marchantiophyta) new to Türkiye

  Batan, Nevzat; Köroğlu, Zeynep Gizem; Erata, Hüseyin; Mamontov, Yuriy S.

  Oncophorus integerrimus Hedenäs and Nardia pacifica Bakalin are new reported from Türkiye and Southwest Asia, following a recent bryological excursion to the Demirkapı plateau of Trabzon in Türkiye. The species’ brief descriptions and illustrations are presented together with their locality information in Türkiye, ecological and geographical distribution notes, and comparisons with morphologically similar taxa.

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• MakaleAçık Erişim2026/r/gumushane/12277
  Valorization of Moss biomass as a natural porous Matrix for shape-stable phase change material (PCM) composites

  Can, Ahmet; Ganguly, Sauradipta; Gencel, Osman; Sarı, Ahmet; Erata, Hüseyin

  Phase change materials (PCMs) are used to improve energy efficiency, particularly in building heat storage and passive thermal management applications. In this study, moss biomass ( Calliergonella cuspidata (Hedw.) Loeske) (Ca) was evaluated as a natural porous matrix, and a novel non leachable composite phase change material (PCM) was developed based on n-octadecane (n-OD). The moss biomass was impregnated with 60% n-OD by direct mixing method, and its structural stability was enhanced by the addition of Sodium silicate (SS) at 10% and 30% (by wt%) respectively. The morphological, chemical, and thermal properties of the composites were characterized by SEM, EDS, FTIR, DSC, TGA, XRD, and thermal conductivity analyses. SEM-EDS results showed that the moss biomass (Ca) had high porosity, with the addition of SS resulting in a more compact and homogeneous structure. FTIR analyses exhibited the formation of Si–O–Si bands, indicating successful integration of SS into the matrix. According to DSC analysis, the Ca/n-OD(60%) composite had a melting temperature of 26.1 °C and a melting enthalpy of 153.7 J/g whereas for the SS-added variants, these values were measured as 148.3 J/g (10%) and 144.2 J/g (30%), respectively. The enthalpy losses of only 2–3 J/g after 700 heating-cooling cycles indicated high thermal stability. TGA and XRD analyses showed that the addition of SS increased the thermal resistance of the composites, creating an amorphous network structure. The results indicate that moss-based Ca/n-OD/SS composites, with their compact, leak-free structure, high heat storage capacity, and excellent cyclic stability, hold promise as eco‑friendly materials for subsequent applications in: thermal energy storage for buildings, solar energy systems, and the thermal management of electronic components.

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• MakaleYalnız künye2026/r/gumushane/10695
  New national and regional bryophyte records, 86

  Wilbraham, J.; Abdirasulov, F.; Aguirre, J.; Alatas, M.; Alba, W. R. Alvaro; Ergenekon, Z. Aslan; Raj, K. Aswathy; Ayhan, E.; Batan, N.; Bednarek-Ochyra, H.

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• MakaleAçık Erişim2025/r/gumushane/16616
  Particle board production using paper mill waste sludge and European black pine (Pinus nigra A.) wood chips

  Karahan, Selim; Tekel, Muharrem

  Paper mills use excessive amounts of water throughout production to produce paper. While mills treat water for reuse, sludge is generated and must be processed as a waste, along with some washing water. In this study, waste sludge from a kraft process mill mixed with up to 40% black pine (Pinus nigra) wood chips was investigated for multi-purpose board production using urea formaldehyde resin and ammonium chloride as a hardener. The panels were pressed at 150 degrees C for 7 minutes between 2.4 MPa and 2.6 MPa. The resulting panels were 18 mm thick, with a density of from 0.69 gr/cm3 to 0.71 g/cm3. Measurements of density, moisture, water absorption, thickness swelling, modulus of rupture, modulus of elasticity and internal bond strength to the surface were carried out on the particle board panels. The results indicated that panels could be used for general purposes.

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• MakaleAçık Erişim2025/r/gumushane/16339
  THREE NEW RECORDS OF MOSSES FROM AZERBAIJAN

  Erata, Hueseyin; Koeroglu, Zeynep gizem; Mammadova, Aygun vidadi; Ibadullayeva, Sayyara; Batan, Nevzaat; Sadigova, Narmin

  Splachnum ampullaceum Hedw., Sphagnum capillifolium (Ehrh.) Hedw., and Plagiothecium cavifolium (Brid.) Z. Iwats. have been reported as new for Azerbaijan, following a recent bryological expedition to the Tugay forest and Dilman forest of Azerbaijan. Of these, Splachnum has been recorded as new genus record for bryophyte flora of Azerbaijan. Brief descriptions, illustrations, geographic distribution, ecology and comparisons with morphologically similar species are presented.

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