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Chemical composition of oriental spruce (Picea orientalis) and oak (Quercus spp.) barks

Year 2017, Volume: 18 Issue: 4, 321 - 327, 28.12.2017
https://doi.org/10.18182/tjf.328494

Abstract



In this study, the chemical composition of bark from
oriental spruce (Picea orientalis), which occur as a result of logging
production of forestry enterprises, and oak (Qercus spp.) bark, which are
industrial waste of the wood panel industry after board production, were
analyzed by wet chemical analysis of wood and analysis methods of phenolic
compound. Ash content values of the barks obtained from Artvin and Trabzon area
were 4.31% and 3.99%, respectively, while the oak bark samples were 10.02%. Hot
water solubility of the spruce bark samples were higher than the oak bark
samples. Residual lignin contents of Artvin spruce, Trabzon spruce, and oak
were 19.53%, 20.61%, and 18.49%, while α-cellulose contents were 37.28%,
37.92%, and 41.59%, respectively. The results of the total phenol content and
butanol-HCl assay showed that Artvin spruce barks had higher values than other
bark samples. As hydrolysable tannins, there were gallo tannin in the samples
of spruce and oak barks whereas ellagic tannin content has not been determined.

References

  • Aydın, S., Üstün, F., 2007. Tanenler kimyasal yapıları, farmakolojik etkileri, analiz yöntemleri. İstanbul Üniv. Vet. Fak. Dergisi, 33(1): 21-31.
  • Balaban, M., Uçar, G., 2001. Extractives and structural components in wood and bark of endemic oak Quercus vulcanica Boiss. Holzforschung, 55(5): 478-486.
  • Balaban, M., 2002. NaClO2 delignifikasyonunda sıcaklık değişimlerinin etkisi, İ.Ü. Orman Fakültesi Dergisi, Seri A, Cilt 52, Sayı:2, 39-50.
  • Balaban Ucar, M., Ucar, G., 2011. Characterization of methanol extracts from Quercus hartwissiana wood and bark. Chemistry of Natural Compounds, 47, 5.
  • Bate-Smith, E.C., 1972. Detection and determination of ellagitannins. Phytochemistry, 11: 1153-1156.
  • Baytop, T., 1999. Türkiye’de Bitkiler ile Tedavi. Nobel Tıp Kitapevi, 2. Baskı, İstanbul, Türkiye, 975-420-021-1.
  • Binotto, A.P., Murphy, W.K., Cutter, B.E., 1971. X-ray diffraction studies of cellulose from bark and wood. Wood Fiber, 3: 179-181.
  • Branca, C., Iannace, A., Blasi, C.D., 2007. Devolatilization and combustion kinetics of Quercus cerris bark. Energy & Fuels, 21:1078-1084.
  • Demetçi, E.Y., 1982. Ağaç kabuklarından yararlanma olanakları. Ormancılık Araştırma Enstitüsü Dergisi, 28 (55): 37-56.
  • Dönmez, İ.E., Dönmez, Ş., 2013. Ağaç kabuğunun yapısı ve yararlanma imkânları. Süleyman Demirel Üniversitesi, Orman Fakültesi Dergisi, 14: 156-162.
  • Dutkuner, İ., Koparan, İ., 2016. Kızılçam ve Karaçam kabuk miktarı ve kullanım olanakları. Electronic Journal of Vocational Colleges, 2. Uluslararası Multidisipliner Avrasya Kongresi Özel Sayısı, 1-10. Feng, S., Cheng, S., Yuan, Z., Leitch, M., Xu, C.C., 2013. Valorization of bark for chemicals and materials: A review. Renewable and Sustainable Energy Reviews, 26: 560-578.
  • Fengel, D., Wegener, G., 1984. Wood Chemistry, Ultrastructure, Reactions, Walter de Gruyter, Berlin New York, 3-11-008481-3.
  • Fradinho, D.M., Pascoal Neto, D., Evtuguin, D., Jorge, F.C., Irle, M.A., Gil, M.H., Pedrosa Jesús, J., 2002. Chemical characterization of bark and of alkaline bark extracts from maritime pine grown in Portugal. Industrial Crops and Products, 16: 23-32.
  • Frihart, C., 2000. Biobased Adhesives and Non-Convential Bonding. Forest Products Laboratory, Madison, WI 53726, USA.
  • Garcia-Perez, M.E., Royer, M., Herbette, G., Desjardins, Y., Pouliot, R., Stevanovic, T., 2012. Picea mariana bark: A new source of trans-resveratrol and other bioactive polyphenols. Food Chemistry, 135: 1173–1182.
  • Gönültaş, O., Balaban Uçar, M., 2012. Fıstıkçamı (Pinus pinea) kabuğunun tanen bileşimi. KSÜ Doğa Bilimleri Dergisi, Özel Sayı: 80-84.
  • Govindarajan, V.S., Mathew, A.G., 1965. Anthocyanidins from leucoanthocyanidins. Phytochemistry, 4: 985-988.
  • Hafizoglu, H., Reunanen, M., 1994. Composition of oleoresins from bark and cones of Abies nordmanniana and Picea orientalis. Holzforschung, 48: 7-11.
  • Hafizoglu, H., Usta, M., Bilgin, Ö., 1997. Wood and bark composition of Picea orientalis (L.) Link. Holzforschung, 51: 114-118.
  • Hafizoglu, H., Holmbom, B., Reunanen, M., 2002. Chemical composition of lipophilic constituents of barks from Pinus nigra, Abies bornmülleriana, and Castanea sativa. Holzforschung, 56: 257-260.
  • Hafizoglu, H., Usta, M., 2005. Chemical composition of coniferous wood species occurring in Turkey. Holz als Roh- und Werkstoff, 63: 83–85.
  • Harkin, J.M., Rowe, J.W., 1971. Bark and its possible uses, Research Note FPL-RN-091, USDA Forest Products Labrotory, Madison, WI.
  • Hon, D.N.S., Shiraishi, N., 2001. Wood and Cellulosic Chemistry. Second Edition, Revised and Expended, CRC Press, Marcel Dekker, New York, 978-0824700249.
  • Inoue, K.H., Hagerman, A.E., 1988. Gallotannin determination with rhodamine. Anal. Biochemistry, 169: 363-369.
  • Jayme, G., 1942. Preparation of holocellulose and cellulose with sodium chlorite. Cellulosechemie. 20: 43-49.
  • Kain, G., Barbu, M.C., Richter, K., Plank, B., Tondi, G., Petutschnigg, A., 2015. Use of tree bark as insulation material. Forest Products Journal, 65:(3-4). Kantay, R., Köse, C., 2006. Türkiye'de kabuk konusunda bugüne kadar yapılan çalışmalar ve değerlendirme. Journal of the Faculty of Forestry Istanbul University, 56(1): 1-16.
  • Kofujita, H., Ettyu, K., Ota, M., 1999. Characterization of the major components in bark from five japanese tree species for chemical utilization. Wood Science and Technology, 33: 223-228.
  • Kurt, R., Mengeloğlu, F., 2006. Potential utilization of bark residues in Turkey. 1st International Non-wood Forest Products Sympossium, 1-4 November, Trabzon.
  • Martin, R.E., Gray, G.R., 1971. pH of southern pine barks. Forest Product Journal, 21, (3), 49-52.
  • Maenpaa, L.H, Laakso, T., Sarjala, T., Wahala, K., Saranpaa, P., 2013. Variation of stilbene glucosides in bark extracts obtained from roots and stumps of Norway Spruce (Picea abies [L.] Karst.). Trees-structure and Function, 27(1): 131-139.
  • Miranda, I., Gominho, Mirra, I., Pereira, H., 2012. Chemical characterization of barks from Picea abies and Pinus sylvestris after fractioning into different particle sizes. Industrial Crops and Products, 36: 395-400.
  • Pasztory, Z., Mohacsine, I.R., Gorbacheva, G., Börcsök, Z., 2016. The utilization of tree bark. BioResources, 11(3): 7859-7888.
  • Runkel, R.O.H., Wilke, K.D., 1951. Zur Kenntnis des thermoplastischen Verhaltens von Holz. II. Mittl. Holz Roh-Werkstoff, 9: 260-270.
  • Özdemir, H., 2010. Bark tannins from commercially important Turkish conifer trees and their use as adhesive in fiberboard. Ph.D. Thesis, Institute of Natural Science, Istanbul University, 154p., İstanbul.
  • Scalbert, A., Haslam, E., 1987. Polyphenols and chemical defence of the leaves of Quercus robur. Phytochemistry, 26: 3191-3195.
  • Scalbert, A., Monties, B., Janin, G., 1989. Tannins in wood: Comparison of different estimation methods. Journal of Agricultural Food Chemistry, 37:1324-1329.
  • Sjostrom, E., 1981. Wood Chemistry : Fundamentals and Applications. Elsevier Science & Technology Books, 9780126474800.
  • Singleton, V.L., Rossi, J.A., 1965. Colorimetry of total phenolics with phosphomolybdicphosphotungstic acid reagents. Am. J. Enol. Vitic., 16: 144-158.
  • Şen, A., Miranda, I., Santos, S., Graça, J., Pereira, H., 2010. The chemical composition of cork and phloem in the rhytidome of Quercus cerris bark. Industrial Crops and Products, 31(2): 417-422.
  • Tappi, 1983. Tappi T-203 cm-99: Alpha-, beta- and gamma-cellulose in pulp, TAPPI Test Methods, Tappi Press, Atlanta Georgia.
  • Tappi, 1985. Tappi UM-250: Acid-soluble lignin in wood and pulp, TAPPI Test Methods, Tappi Press, Atlanta Georgia.
  • Tappi, 1992. Tappi T-204 om-88: Solvent extractives of wood and pulp, TAPPI Test Methods, Tappi Press, Atlanta Georgia, Vol 1.
  • Tappi, 1992. Tappi T-207 om-88: Water solubility of wood and pulp, TAPPI Test Methods, Tappi Press, Atlanta Georgia, Vol 1.
  • Tappi, 1992. Tappi T-211 om- 85: Ash in wood and pulp, TAPPI Test Methods, Tappi Press, Atlanta Georgia, Vol 1.
  • Tappi, 1992. Tappi T-212 om-88: One percent sodium hydroxide solubity of wood and pulp, TAPPI Test Methods, Tappi Press, Atlanta Georgia, Vol 1.
  • Tappi, 1992. Tappi T-257 cm-85: Sampling and preparing wood for analysis, TAPPI Test Methods, Tappi Press, Atlanta Georgia, Vol 1.
  • Timell, T.E., 1961. Isolation of polysaccharides from the bark of gymnosperms. Swensk Papperstid. 64, 651-661.
  • Umezawa, T., 2001. Chemistry of Extractives, In Wood and Cellulosic Chemistry, pp. 914. Edited by D. N.-S. Hon & N. Shiraishi. New York-Basel: Marcel Dekker.
  • Vazquez, G., Fontenla, E., Santos, J., Freire, M.S., Alverez, J.G., Antorrena, G., 2008. Antioxidant activity and phenolic content of chesnut (Castanea sativa) sheel and Eucalyptus (Eucalyptus globus) bark extracts. Industrial Crops and Products, 28: 279-285.
  • Wise, L.E., Murphy, M., D’addieco, A.A., 1946. Chlorite holocellulose, its fractionation and beaning on summative wood analysis and studies on the hemicellulose. Pap. Trade J., 122 (2): 35-43.
  • Yemele, M.C.N., Koubaa, A., Cloutier, A., Soulounganga, P., Wolcott, M., 2010. Effect of bark fiber content and size on the mechanical properties of bark/HDPE composites. Composite: Part A, 41: 131-137.

Doğu ladini (Picea orientalis) ve meşe (Quercus spp.) kabuklarının kimyasal bileşimi

Year 2017, Volume: 18 Issue: 4, 321 - 327, 28.12.2017
https://doi.org/10.18182/tjf.328494

Abstract



Bu çalışmada, orman işletmelerinde kesim sonrası ortaya
çıkan doğu ladini (Picea orientalis) kabukları ve ahşap levha endüstrisinde
levha üretimi sonrası ortaya çıkan endüstriyel atık meşe (Qercus spp.)
kabuklarının kimyasal bileşimi temel odun analizleri ve fenolik bileşik analiz
metotlarıyla incelenmiştir. Kabuklarda kül tayini sonuçlarına göre Artvin ve
Trabzon ladin örneklerinde % 4.31 ve % 3.99 kül bulunurken meşe kabuğunda %
10.02 gibi yüksek sonuç belirlenmiştir. Sıcak su çözünürlüğünün ladin
örneklerinde meşeye göre daha yüksek olduğu ortaya konulmuştur. Artvin ladin,
Trabzon ladin ve meşe kabuklarında kalıntı lignin sırasıyla % 19.53; % 20.61 ve
% 18.49 olarak belirlenirken α-selüloz miktarı için % 37.28; % 37.92 ve % 41.59
değerleri elde edilmiştir. Toplam fenol tayini ve butanol HCl yöntemi
sonuçlarına göre Artvin ladin kabuğu en yüksek değerlere sahiptir. Ladin ve
meşe kabuğu örneklerinde hidrolize tanenler olan gallo tanen bulunurken ellag
taneni içeriği belirlenememiştir.

References

  • Aydın, S., Üstün, F., 2007. Tanenler kimyasal yapıları, farmakolojik etkileri, analiz yöntemleri. İstanbul Üniv. Vet. Fak. Dergisi, 33(1): 21-31.
  • Balaban, M., Uçar, G., 2001. Extractives and structural components in wood and bark of endemic oak Quercus vulcanica Boiss. Holzforschung, 55(5): 478-486.
  • Balaban, M., 2002. NaClO2 delignifikasyonunda sıcaklık değişimlerinin etkisi, İ.Ü. Orman Fakültesi Dergisi, Seri A, Cilt 52, Sayı:2, 39-50.
  • Balaban Ucar, M., Ucar, G., 2011. Characterization of methanol extracts from Quercus hartwissiana wood and bark. Chemistry of Natural Compounds, 47, 5.
  • Bate-Smith, E.C., 1972. Detection and determination of ellagitannins. Phytochemistry, 11: 1153-1156.
  • Baytop, T., 1999. Türkiye’de Bitkiler ile Tedavi. Nobel Tıp Kitapevi, 2. Baskı, İstanbul, Türkiye, 975-420-021-1.
  • Binotto, A.P., Murphy, W.K., Cutter, B.E., 1971. X-ray diffraction studies of cellulose from bark and wood. Wood Fiber, 3: 179-181.
  • Branca, C., Iannace, A., Blasi, C.D., 2007. Devolatilization and combustion kinetics of Quercus cerris bark. Energy & Fuels, 21:1078-1084.
  • Demetçi, E.Y., 1982. Ağaç kabuklarından yararlanma olanakları. Ormancılık Araştırma Enstitüsü Dergisi, 28 (55): 37-56.
  • Dönmez, İ.E., Dönmez, Ş., 2013. Ağaç kabuğunun yapısı ve yararlanma imkânları. Süleyman Demirel Üniversitesi, Orman Fakültesi Dergisi, 14: 156-162.
  • Dutkuner, İ., Koparan, İ., 2016. Kızılçam ve Karaçam kabuk miktarı ve kullanım olanakları. Electronic Journal of Vocational Colleges, 2. Uluslararası Multidisipliner Avrasya Kongresi Özel Sayısı, 1-10. Feng, S., Cheng, S., Yuan, Z., Leitch, M., Xu, C.C., 2013. Valorization of bark for chemicals and materials: A review. Renewable and Sustainable Energy Reviews, 26: 560-578.
  • Fengel, D., Wegener, G., 1984. Wood Chemistry, Ultrastructure, Reactions, Walter de Gruyter, Berlin New York, 3-11-008481-3.
  • Fradinho, D.M., Pascoal Neto, D., Evtuguin, D., Jorge, F.C., Irle, M.A., Gil, M.H., Pedrosa Jesús, J., 2002. Chemical characterization of bark and of alkaline bark extracts from maritime pine grown in Portugal. Industrial Crops and Products, 16: 23-32.
  • Frihart, C., 2000. Biobased Adhesives and Non-Convential Bonding. Forest Products Laboratory, Madison, WI 53726, USA.
  • Garcia-Perez, M.E., Royer, M., Herbette, G., Desjardins, Y., Pouliot, R., Stevanovic, T., 2012. Picea mariana bark: A new source of trans-resveratrol and other bioactive polyphenols. Food Chemistry, 135: 1173–1182.
  • Gönültaş, O., Balaban Uçar, M., 2012. Fıstıkçamı (Pinus pinea) kabuğunun tanen bileşimi. KSÜ Doğa Bilimleri Dergisi, Özel Sayı: 80-84.
  • Govindarajan, V.S., Mathew, A.G., 1965. Anthocyanidins from leucoanthocyanidins. Phytochemistry, 4: 985-988.
  • Hafizoglu, H., Reunanen, M., 1994. Composition of oleoresins from bark and cones of Abies nordmanniana and Picea orientalis. Holzforschung, 48: 7-11.
  • Hafizoglu, H., Usta, M., Bilgin, Ö., 1997. Wood and bark composition of Picea orientalis (L.) Link. Holzforschung, 51: 114-118.
  • Hafizoglu, H., Holmbom, B., Reunanen, M., 2002. Chemical composition of lipophilic constituents of barks from Pinus nigra, Abies bornmülleriana, and Castanea sativa. Holzforschung, 56: 257-260.
  • Hafizoglu, H., Usta, M., 2005. Chemical composition of coniferous wood species occurring in Turkey. Holz als Roh- und Werkstoff, 63: 83–85.
  • Harkin, J.M., Rowe, J.W., 1971. Bark and its possible uses, Research Note FPL-RN-091, USDA Forest Products Labrotory, Madison, WI.
  • Hon, D.N.S., Shiraishi, N., 2001. Wood and Cellulosic Chemistry. Second Edition, Revised and Expended, CRC Press, Marcel Dekker, New York, 978-0824700249.
  • Inoue, K.H., Hagerman, A.E., 1988. Gallotannin determination with rhodamine. Anal. Biochemistry, 169: 363-369.
  • Jayme, G., 1942. Preparation of holocellulose and cellulose with sodium chlorite. Cellulosechemie. 20: 43-49.
  • Kain, G., Barbu, M.C., Richter, K., Plank, B., Tondi, G., Petutschnigg, A., 2015. Use of tree bark as insulation material. Forest Products Journal, 65:(3-4). Kantay, R., Köse, C., 2006. Türkiye'de kabuk konusunda bugüne kadar yapılan çalışmalar ve değerlendirme. Journal of the Faculty of Forestry Istanbul University, 56(1): 1-16.
  • Kofujita, H., Ettyu, K., Ota, M., 1999. Characterization of the major components in bark from five japanese tree species for chemical utilization. Wood Science and Technology, 33: 223-228.
  • Kurt, R., Mengeloğlu, F., 2006. Potential utilization of bark residues in Turkey. 1st International Non-wood Forest Products Sympossium, 1-4 November, Trabzon.
  • Martin, R.E., Gray, G.R., 1971. pH of southern pine barks. Forest Product Journal, 21, (3), 49-52.
  • Maenpaa, L.H, Laakso, T., Sarjala, T., Wahala, K., Saranpaa, P., 2013. Variation of stilbene glucosides in bark extracts obtained from roots and stumps of Norway Spruce (Picea abies [L.] Karst.). Trees-structure and Function, 27(1): 131-139.
  • Miranda, I., Gominho, Mirra, I., Pereira, H., 2012. Chemical characterization of barks from Picea abies and Pinus sylvestris after fractioning into different particle sizes. Industrial Crops and Products, 36: 395-400.
  • Pasztory, Z., Mohacsine, I.R., Gorbacheva, G., Börcsök, Z., 2016. The utilization of tree bark. BioResources, 11(3): 7859-7888.
  • Runkel, R.O.H., Wilke, K.D., 1951. Zur Kenntnis des thermoplastischen Verhaltens von Holz. II. Mittl. Holz Roh-Werkstoff, 9: 260-270.
  • Özdemir, H., 2010. Bark tannins from commercially important Turkish conifer trees and their use as adhesive in fiberboard. Ph.D. Thesis, Institute of Natural Science, Istanbul University, 154p., İstanbul.
  • Scalbert, A., Haslam, E., 1987. Polyphenols and chemical defence of the leaves of Quercus robur. Phytochemistry, 26: 3191-3195.
  • Scalbert, A., Monties, B., Janin, G., 1989. Tannins in wood: Comparison of different estimation methods. Journal of Agricultural Food Chemistry, 37:1324-1329.
  • Sjostrom, E., 1981. Wood Chemistry : Fundamentals and Applications. Elsevier Science & Technology Books, 9780126474800.
  • Singleton, V.L., Rossi, J.A., 1965. Colorimetry of total phenolics with phosphomolybdicphosphotungstic acid reagents. Am. J. Enol. Vitic., 16: 144-158.
  • Şen, A., Miranda, I., Santos, S., Graça, J., Pereira, H., 2010. The chemical composition of cork and phloem in the rhytidome of Quercus cerris bark. Industrial Crops and Products, 31(2): 417-422.
  • Tappi, 1983. Tappi T-203 cm-99: Alpha-, beta- and gamma-cellulose in pulp, TAPPI Test Methods, Tappi Press, Atlanta Georgia.
  • Tappi, 1985. Tappi UM-250: Acid-soluble lignin in wood and pulp, TAPPI Test Methods, Tappi Press, Atlanta Georgia.
  • Tappi, 1992. Tappi T-204 om-88: Solvent extractives of wood and pulp, TAPPI Test Methods, Tappi Press, Atlanta Georgia, Vol 1.
  • Tappi, 1992. Tappi T-207 om-88: Water solubility of wood and pulp, TAPPI Test Methods, Tappi Press, Atlanta Georgia, Vol 1.
  • Tappi, 1992. Tappi T-211 om- 85: Ash in wood and pulp, TAPPI Test Methods, Tappi Press, Atlanta Georgia, Vol 1.
  • Tappi, 1992. Tappi T-212 om-88: One percent sodium hydroxide solubity of wood and pulp, TAPPI Test Methods, Tappi Press, Atlanta Georgia, Vol 1.
  • Tappi, 1992. Tappi T-257 cm-85: Sampling and preparing wood for analysis, TAPPI Test Methods, Tappi Press, Atlanta Georgia, Vol 1.
  • Timell, T.E., 1961. Isolation of polysaccharides from the bark of gymnosperms. Swensk Papperstid. 64, 651-661.
  • Umezawa, T., 2001. Chemistry of Extractives, In Wood and Cellulosic Chemistry, pp. 914. Edited by D. N.-S. Hon & N. Shiraishi. New York-Basel: Marcel Dekker.
  • Vazquez, G., Fontenla, E., Santos, J., Freire, M.S., Alverez, J.G., Antorrena, G., 2008. Antioxidant activity and phenolic content of chesnut (Castanea sativa) sheel and Eucalyptus (Eucalyptus globus) bark extracts. Industrial Crops and Products, 28: 279-285.
  • Wise, L.E., Murphy, M., D’addieco, A.A., 1946. Chlorite holocellulose, its fractionation and beaning on summative wood analysis and studies on the hemicellulose. Pap. Trade J., 122 (2): 35-43.
  • Yemele, M.C.N., Koubaa, A., Cloutier, A., Soulounganga, P., Wolcott, M., 2010. Effect of bark fiber content and size on the mechanical properties of bark/HDPE composites. Composite: Part A, 41: 131-137.
There are 51 citations in total.

Details

Subjects Engineering
Journal Section Orijinal Araştırma Makalesi
Authors

Oktay Gönültaş

Mualla Balaban Uçar

Publication Date December 28, 2017
Acceptance Date September 26, 2017
Published in Issue Year 2017 Volume: 18 Issue: 4

Cite

APA Gönültaş, O., & Balaban Uçar, M. (2017). Chemical composition of oriental spruce (Picea orientalis) and oak (Quercus spp.) barks. Turkish Journal of Forestry, 18(4), 321-327. https://doi.org/10.18182/tjf.328494
AMA Gönültaş O, Balaban Uçar M. Chemical composition of oriental spruce (Picea orientalis) and oak (Quercus spp.) barks. Turkish Journal of Forestry. December 2017;18(4):321-327. doi:10.18182/tjf.328494
Chicago Gönültaş, Oktay, and Mualla Balaban Uçar. “Chemical Composition of Oriental Spruce (Picea Orientalis) and Oak (Quercus spp.) Barks”. Turkish Journal of Forestry 18, no. 4 (December 2017): 321-27. https://doi.org/10.18182/tjf.328494.
EndNote Gönültaş O, Balaban Uçar M (December 1, 2017) Chemical composition of oriental spruce (Picea orientalis) and oak (Quercus spp.) barks. Turkish Journal of Forestry 18 4 321–327.
IEEE O. Gönültaş and M. Balaban Uçar, “Chemical composition of oriental spruce (Picea orientalis) and oak (Quercus spp.) barks”, Turkish Journal of Forestry, vol. 18, no. 4, pp. 321–327, 2017, doi: 10.18182/tjf.328494.
ISNAD Gönültaş, Oktay - Balaban Uçar, Mualla. “Chemical Composition of Oriental Spruce (Picea Orientalis) and Oak (Quercus spp.) Barks”. Turkish Journal of Forestry 18/4 (December 2017), 321-327. https://doi.org/10.18182/tjf.328494.
JAMA Gönültaş O, Balaban Uçar M. Chemical composition of oriental spruce (Picea orientalis) and oak (Quercus spp.) barks. Turkish Journal of Forestry. 2017;18:321–327.
MLA Gönültaş, Oktay and Mualla Balaban Uçar. “Chemical Composition of Oriental Spruce (Picea Orientalis) and Oak (Quercus spp.) Barks”. Turkish Journal of Forestry, vol. 18, no. 4, 2017, pp. 321-7, doi:10.18182/tjf.328494.
Vancouver Gönültaş O, Balaban Uçar M. Chemical composition of oriental spruce (Picea orientalis) and oak (Quercus spp.) barks. Turkish Journal of Forestry. 2017;18(4):321-7.