SPECTROPHOTOMETRICAL STUDY ON BARK S TANNIN OF ALDER AND OAK TREES

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

TORKAMAN J.; DOUST HOSSEINI K.; MIRSHOKRAEI S.A.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF NATURAL RESOURCES Year:2003 | Volume:56 | Issue:3 Page(s): 271-279

Download Full-Text

Persian Verion

View:

1,915

Download:

Cites:

Information Journal Paper

Title

SPECTROPHOTOMETRICAL STUDY ON BARK S TANNIN OF ALDER AND OAK TREES

Author(s)

TORKAMAN J. | DOUST HOSSEINI K. | MIRSHOKRAEI S.A. | Issue Writer Certificate

Keywords

CONDENSED TANNINQ4

HYDROLYSABLE TANNINQ4

STIASNY NUMBERQ4

ELLAGIC ACIDQ4

GALLIC ACIDQ4

SEPHADEX LH-20Q4

SPECTROPOTOMETRYQ4

Abstract

In this study, bark of alder (Alnus subcordata) and oak (Quercus castanifolia) were extracted by 1% alkali (1:10 w/v) at 90°C for one hour. Net yield of extractions were 21.44% for alder and 24.07% for oak. According to STIASNY NUMBER obtained for alder (90.28) and oak (70.02), the value of active polyphenolic compounds for the two species were estimated to be 19.35 and 16.85%, respectively. The amounts of CONDENSED TANNIN were determined by column chromatography packed with sephadex LH- 20 and found to be 6.3% and 4.2%, respectively. The results showed that CONDENSED TANNIN in alder is 50% more than that in oak. The HYDROLYSABLE TANNINs (gallotannin and ellagitannin) were also estimated by spectrophotometry method. The high amount of ELLAGIC ACID in oak and alder extractives (respectively 43% and 35.3%), indicates that most of the tannin in these species are hydrolysable. In general, the bark of oak and alder contained 21% and 6.9% tannin, respectively.

Cites

References

No record.

Cite

APA: Copy

TORKAMAN, J., DOUST HOSSEINI, K., & MIRSHOKRAEI, S.A.. (2003). SPECTROPHOTOMETRICAL STUDY ON BARK S TANNIN OF ALDER AND OAK TREES. IRANIAN JOURNAL OF NATURAL RESOURCES, 56(3), 271-279. SID. https://sid.ir/paper/22782/en

Vancouver: Copy

TORKAMAN J., DOUST HOSSEINI K., MIRSHOKRAEI S.A.. SPECTROPHOTOMETRICAL STUDY ON BARK S TANNIN OF ALDER AND OAK TREES. IRANIAN JOURNAL OF NATURAL RESOURCES[Internet]. 2003;56(3):271-279. Available from: https://sid.ir/paper/22782/en

IEEE: Copy

J. TORKAMAN, K. DOUST HOSSEINI, and S.A. MIRSHOKRAEI, “SPECTROPHOTOMETRICAL STUDY ON BARK S TANNIN OF ALDER AND OAK TREES,” IRANIAN JOURNAL OF NATURAL RESOURCES, vol. 56, no. 3, pp. 271–279, 2003, [Online]. Available: https://sid.ir/paper/22782/en

Related Journal Papers