Fortification of sulfited tannin from the bark of Acacia mangium with phenol–formaldehyde for use as plywood adhesive

Hoong, Yeoh Beng; Paridah, M. T.; Luqman, C. A.; Koh, Moo-Seok; Loh, Yueh Feng

doi:10.1016/j.indcrop.2009.07.012

Cited by 75 publications

(52 citation statements)

References 15 publications

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“…This was shown in this experiment where the yield of tannin extracted by 6% sodium sulphite solution was the highest (31.20%). The result in agreement with Hoong et al (2009) who reported that addition of sodium sulphite in water increased tannin extract from 15% to 25% from Acacia mangium bark. This is due to the reaction between sodium sulphite and the phenolic hydroxyl group of tannin to form a sulfonated polyfl avonoid (Herrick, 1980).…”

Section: Yield Of Tanninsupporting

confidence: 92%

Biological Activity of Tannins from Acacia mangium Bark Extracted by Diff erent Solvents

Wina¹,

W.R²,

Tangendjaja³

2010

medpet

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Acacia mangium bark is abundant byproduct of wood industry in Indonesia. It is underutilized and mainly used as fi re wood for the wood industry. The bark contains high level of tannin but the tannin has not been extracted or produced commercially. Tannin isolate can be used for several purposes such as tanning agent for leather, adhesive for plywood or particle board, etc. In ruminant, tannin can be detrimental but can also be benefi cial. This experiment was aimed of ge ing the highest yield of tannin extract with the highest biological activity in rumen fermentation. Nine diff erent solvents at diff erent temperatures were used to extract tannin from A. mangium bark. The extracts were analyzed for their tannin contents and biological activities. Tannin content was analyzed using folin ciocalteau and butanol-HCl methods. Biological activity was described as a percentage of an increase in gas production in the in vitro rumen-buff er fermentation, with and without addition of PEG. The results show that Na 2 SO 3 solution extracted more tannin than other solutions and the higher the concentration of Na 2 SO 3 solution, the higher the yield of tannin extract. The solution of 6% sodium sulphite gave the highest yield of tannin extract (31.2% of original bark sample) and the highest concentration of tannin (18.26%) but produced a negative eff ect on in vitro fermentation (% increase of gas production = 2.70%). Extraction with 50% acetone gave a high yield of extract (22.28% of original bark) which contained 12.98% of tannin and showed the highest biological response (% increase of gas production = 216%). In conclusion, sodium sulphite solution is not recommended for tannin extraction if the tannin will be used as feed additive in ruminant feed; on the other hand, the aqueous acetone (50% acetone) solution is a be er choice to be used.

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Section: Yield Of Tanninsupporting

confidence: 92%

Biological Activity of Tannins from Acacia mangium Bark Extracted by Diff erent Solvents

Wina¹,

W.R²,

Tangendjaja³

2010

medpet

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“…The FT-IR result showed control tannin treated to tannin with enzymes exhibited a different pattern. Previous reports that the variations in the absorbance at 3454, 2358, 2070, 1640, 667 state that the tannase enzymes degradable to tannic acid in the tannin complex compound [34]. This assumption is logical when one realizes that most industrial enzymes will necessarily have originated from the small percentage that has been cultured because of the poor ability to culture environmental microorganisms [35].…”

Section: Discussionmentioning

confidence: 99%

Digestion of Tannin by Bacteria Enterobacter cloacae from the Gut of Indian Mole Cricket (Gryllotalpa krishnani)

RK¹,

Revathi²,

Rameshkumar³

et al. 2017

J Bioprocess Biotech

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Insects are the most successful animal on earth; the gut microbes present might play an important role in food digestion as well as the interaction with hosts. In this study insect Gryllotalpa krishnani has been used to isolate the symbiotic associated organisms which play role in host metabolism, promote efficient digestion and to protect the host from the harmful microbes. In the present study, microorganisms were isolated from the gut of G. krishnani and characterized for tannase enzyme activity. It was observed that 5 isolates (TAH 6, TAH 13, TAH 36, TAH 38 and TAH 41) out of total 120 tested were able to show significant growth on tannic acid plate. Among these five potential isolates, strain TAH 41 exhibited maximum tannase activity in tannase plate assay and was selected for the further study. The bacterial strain TAH41 was analyzed for biochemical analysis, 16S rDNA sequencing and the result confirmed the strain as Enterobacter cloacae. HPLC analysis showed the formation two peaks representing gallic acid and glucose as a by-product FT-IR analysis also confirmed the same. The polyacrylamide gel electrophoresis (SDS-PAGE) and zymogram analysis showed the molecular mass of tannase enzyme in cell free extract was ~45 kDa, the analysis suggested this tannase enzyme to be one of the smallest of the bacterial source, which could be attributed to the formation of di or tri-galloyl glucose. The present study was the first report E. cloacae with tannase activity from G. krishnani gut. E. cloacae which may endow the insect with some ecological advantages by enabling them to overcome the anti-nutritional effects of plant tannins.Citation: Rasiravuthanahalli KG, Revathi S, Rameshkumar N, Krishnan M, Kayalvizhi N (2017) Digestion of Tannin by Bacteria Enterobacter cloacae from the Gut of Indian Mole Cricket (Gryllotalpa krishnani).

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“…Rendemen ekstrak kering yang diperoleh sebesar 4,38%. Hasil ini lebih tinggi dari hasil penelitian terdahulu, yaitu dari ekstrak kulit pohon mangium kering dengan pelarut yang sama sebesar 0,85% (Hindriani, Pradono, & Santoso, 2005), namun lebih kecil dari penelitian terdahulu sebesar 6,20% (Hoong, Paridah, Luqman, Koh, & Loh, 2009), 17,70% (Mohamad, Zakaria, & Pizzi, 2010), 23,40% (Hoong et al, 2010), 16,40% (Yeoh Beng Hoong, Paridah, Loh, Jalaluddin, & Chuah, 2011, dan 24,45% (Feng, Cheng, Yuan, Leitch, & Xu, 2013). Rendahnya rendemen ini juga terkonfirmasi dengan bobot jenis, kadar padatan, dan kekentalan yang juga cukup rendah dengan nilai masing-masing sebesar 1,02; 1,33%, dan 1,04 poise.…”

Section: A Ciri Ekstrak Kulit Pohon Mangiumunclassified

Sintesis Perekat Tanin Resorsinol Formaldehida Dari Ekstrak Kulit Pohon Mangium Untuk Peningkatan Kualitas Batang Sawit

Rachmawati¹,

Sugita²,

Santoso³

2018

j.penelit.has.kehutan

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Oil palm trunk is lower in dimensional stability, density, physical, and mechanical properties than other wood species. Efforts to overcome the weakness of the oil palm trunk properties could be conducted through densification ABSTRAKBatang sawit memiliki stabilitas dimensi, kerapatan, sifat fisik, dan mekanik lebih rendah daripada jenis kayu lainnya. Upaya mengatasi kelemahan sifat batang sawit dapat dilakukan melalui pemadatan (densifikasi) menggunakan kempa panas dan penambahan bahan kimia atau perekat. Tujuan penelitian ini adalah untuk mendapatkan komposisi optimal tanin resorsinol formaldehida (TRF) dalam aplikasinya sebagai bahan perekat untuk peningkatan kualitas batang sawit. Tanin diekstraksi menggunakan air pada suhu 75°C kemudian dikopolimerisasi dengan resorsinol dan formaldehida.

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Fortification of sulfited tannin from the bark of Acacia mangium with phenol–formaldehyde for use as plywood adhesive

Cited by 75 publications

References 15 publications

Biological Activity of Tannins from Acacia mangium Bark Extracted by Diff erent Solvents

Biological Activity of Tannins from Acacia mangium Bark Extracted by Diff erent Solvents

Digestion of Tannin by Bacteria Enterobacter cloacae from the Gut of Indian Mole Cricket (Gryllotalpa krishnani)

Sintesis Perekat Tanin Resorsinol Formaldehida Dari Ekstrak Kulit Pohon Mangium Untuk Peningkatan Kualitas Batang Sawit

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