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

Gönültaş, Oktay; Uçar, Mualla Balaban

doi:10.18182/tjf.328494

Cited by 6 publications

(7 citation statements)

References 24 publications

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“…This percentage is close to the percentages found in previous literature studies, which reported 18.8% and 20.07%, reported by Miranda et al (2012) and Fengel and Wegener (1989), respectively. The oak bark extractive content was found to be 18.8%, which was higher than the 11.4% reported by Gönültaş and Uçar (2017). The fir bark extractive content was also 11.4%.…”

Section: Resultscontrasting

confidence: 67%

“…There have been many topics of bark utilization research. However, bark research can be divided into two main objectives: utilization of their main components (cellulose, lignin, and hemicellulose) (Fengel and Wegener 1989;Usta 1993;Balaban and Ucar 2001;Odabaş-Serin and Gümüşkaya 2006;Safdari et al 2011;Miranda et al 2012;Akgül et al 2013;Serin and Güleç 2014;Durmaz et al 2016;Gönültaş and Uçar 2017), and their secondary metabolite qualities (Sjödin et al 1996;Kuliev et al 1997;Vrkočová et al 2000;Diouf et al 2009;Yesil-Celiktas et al 2009;Duda-Chodak et al 2011;Lee et al 2011;Maimoona et al 2011;Sati et al 2012;Legault et al 2013;Bouras et al 2015;Devappa et al 2015;Hofmann et al 2015;Özgenç et al 2016;Özgenç et al 2017;Dróżdż and Pyrzynska 2018).…”

Section: Introductionmentioning

confidence: 99%

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Chemical composition and antioxidant properties of some industrial tree bark extracts

Hamad

Ateş

Olgun

et al. 2019

BioRes

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Wood bark is a residue of forestry production that is used as a fuel source. The chemical composition of tree bark is similar to that of the harvested wood, and it contains a variety of useful compounds. To determine the chemical composition and antioxidant activities of different barks, fir (Abies nordmanniana), beech (Fagus orientalis), pine (Pinus sylvestris), poplar (Populus alba), and oak (Quercus robur) barks were selected because they are used for industrial purposes in Turkey. The dried bark powders were extracted using a 65:35 methanol-water mixture (v/v) to determine the total phenolic content, the flavonoid content, and the antioxidant properties (2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), metal chelating, and H2O2 scavenging). The flavonoid components were analyzed by high performance liquid chromatography (HPLC) and extracted by hexane to analyze the volatile components by gas chromatography-mass spectrometry (GC-MS). The poplar bark extracts had the highest total phenolic content, highest total flavonoid content, and highest antioxidant content. The poplar bark extracts were rich in myricetin (87.761 mg/L), which is a flavonoid with rich antioxidant properties. The presence of valuable extracts suggests that barks may have uses as valuable raw materials for chemical applications such as cosmetics, perfumes, and food preservatives.

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Section: Resultscontrasting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Chemical composition and antioxidant properties of some industrial tree bark extracts

Hamad

Ateş

Olgun

et al. 2019

BioRes

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“…Elde edilen sonuçlar incelendiğinde eter fazı 15.02 ve su fazı 27.77 değerleri doğu ladini ve meşe için belirlenen değerlere benzerdir. Fıstık çamı kabuk taneninin incelendiği çalışmada 6.87 ve 36.22 (Gönültaş & Uçar, 2012b), ökaliptus kabuk taneninde 14.39 ve kestane dış kabuğu taneninde 52.17 (Vazquez ve ark., 2009) değerleri belirlenmiştir. Toros sediri tanen ekstraktı örneklerinde bütanol-HCl yöntemine göre antosiyanidin (flavonoid) miktarı 7.61 mg/g CE olarak belirlenmiştir.…”

Section: Bulgular Ve Tartışmaunclassified

“…3282 cm -1 piki fenolik yapıya farklı şekilde bağlı OH gruplarını göstermektedir (Gönültaş & Uçar, 2012a); Gönültaş & Uçar, 2012b;Ricci ve ark., 2015;Ghitescu ve ark., 2015). 3100-2800 cm -1 bölgesi aromatik bileşiklerdeki C-H gerilim bölgesi olarak tanımlanmaktadır.…”

Section: Bulgular Ve Tartışmaunclassified

“…Oduna göre kimyasal bileşim bakımından daha kompleks bir yapıda olan kabuğun kimyasal bileşimi ağaç türleri arasındaki morfolojik elemanlara göre farklılık göstermektedir. Odunda bulunan kimyasal bileşenlerin büyük bir kısmı değişik oranlarda kabukta da bulunurken, ağaç kabukları yüksek oranda polifenolik bileşikler ve süberin içermesi, daha düşük polisakkarit miktarı ve yüksek oranda ekstraktif madde içeriğiyle odundan ayrılırlar (Gönültaş & Uçar, 2012b (Pizzi, 2016, Bisanda ve ark., 2003. Tanenler alkoloid, jelatin ve diğer proteinlerle çökelme reaksiyonu verebilen açık kahverenginden beyaza kadar değişik renklerde, ilginç kokusu ve buruk bir tadı olan amorf toz şeklinde doğal fenolik maddelerdir (Khanbabae & Ree, 2001 (Pizzi & Mittal, 2003;Hagerman, 2002 (Yazaki & Hillis, 1977).…”

Section: Introductionunclassified

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Phenolic composition of bark tannin from Taurus Cedar (Cedrus libani)

Gönültaş¹,

Sarialan²

2017

Kastamonu Üniversitesi Orman Fakültesi Dergisi

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Phenolic composition of bark tannin from Taurus Cedar (Cedrus libani)Abstract Aim of study: In this study, tannin extraction from waste barks was performed which occur as a result of logging production of Taurus cedar tree (Cedrus libani A. Rich.) that grows naturally in our country. The phenolic composition of the cedar bark tannin was introduced by analytical methods and FTIR analysis.Area of study: Extraction of tannin from waste wood bark, characterization of phenolic compound and determination of industrial use possibilities.Material and Methods: The bark sample of Taurus cedar from Adana district was extracted from bark:water ratio of 1:8 (w/w) at 70 °C for 1 hour. Extraction yield, pH and stiasny number values were determined at the extract solution. Then, phenolic composition of the tannin was investigated by total phenol content, butanol:HCl assay, DNS reducing sugar method, and FTIR analysis.Main results: As a result of extraction, tannin yield and stiasny number value were determined 8.99 % and 28.85, respectively. The results of total phenol content were 15.20 mg/g in ether phase and 27.77 aqueous phase. According to butanol-HCl assay, 7.61 mg/g proanthocyanidin content was found and 41.77 mg/g reducing sugar power were assayed by DNS reducing sugar method. FTIR spectra of the tannin was observed that presence of the characteristic peak for condensed tannin at 1605 cm -1 . Research highlights: Phenolic compound analysis methods and FTIR analysis revealed that the the bark tannin of taurus cedar contained flavonoid units, which are monomeric building units of condensed tannins.

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The effect of varnish type, glue amount, and density on the surface properties of low density particleboards produced from waste wood bark

Özlüsoylu

2023

BioRes

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Particleboards, which are widely used in various fields, are commonly coated with solid and liquid surface coating materials to achieve better physical, mechanical, and aesthetic results. This study produced low-density particleboards from waste wood bark using different adhesive mixtures and densities. These particleboards were then coated with three types of varnish: water-based (Aq), polyurethane-based (Pu), and oil/wax-based (Ow). The color, gloss, and surface roughness values of the coated boards were determined to investigate the effect of varnish type, total adhesive usage, and density on these properties. In the board groups produced with the same glue ratio and density, the roughness values obtained with Ow varnish application were mostly higher compared to Aq and Pu. In the Ow varnish type, the roughness (Rmax) decreased linearly with increasing total adhesive amount in particleboards produced at low density (320 kg/m3). The highest color change (ΔE*) values for all variations were obtained in the Ow varnish type, while the highest gloss values were achieved at 85° and in the B2 (4%-420 kg/m3) board group. It was concluded that higher density should be preferred for smoother and glossier surfaces, which are important in terms of surface properties and aesthetics. Overall, these findings highlight the preference for higher density to achieve smoother and glossier surfaces in areas where surface properties and aesthetics are significant.

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

Cited by 6 publications

References 24 publications

Chemical composition and antioxidant properties of some industrial tree bark extracts

Chemical composition and antioxidant properties of some industrial tree bark extracts

Phenolic composition of bark tannin from Taurus Cedar (Cedrus libani)

The effect of varnish type, glue amount, and density on the surface properties of low density particleboards produced from waste wood bark

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