http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Gabriel-Parra Rosalío (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
Characterization of tannin extracts derived from the bark of four tree species by HPLC and FTIR
Ruiz-Aquino Faustino,Feria-Reyes Rossy,Rutiaga-Quiñones José Guadalupe,Robledo-Taboada Luis Humberto,Gabriel-Parra Rosalío 한국산림과학회 2023 Forest Science And Technology Vol.19 No.1
The objective of this work was the extraction and quantification of tannins obtained from the bark of four tree species from the forests of Ixtlan de Juarez, Oaxaca, Mexico (Arbutus xalapensis Kunth., Prunus serotina Ehrh., Quercus crassifolia Humb. and Bonpl., and Quercus laurina Humb. and Bonpl.), In this extraction process, 90% ethanol was used as solvent at an extraction temperature of 70 C for 2 h. The quantification of phenolic compounds, condensed tannins, and percentage of total extract, were obtained using the Stiasny number. The total extracts were 12.87, 16.38, 19.31, and 25.68% for P. serotina, Q. laurina, Q. crassifolia, and A. xalapensis, respectively. The condensed tannins were characterized by Fourier Transformed Infrared Spectroscopy (FTIR) where at 1626 cm1 is observed an isomerization that implies a rotation between the C and B rings that corresponding at elongation of bonds in benzene structure of catechin. The purity of the extracted tannins was analyzed by High Performance Liquid Chromatography (HPLC). The effectiveness of the extraction process was proven; the importance of knowing the amount of tannins will promote the utilization of the bark of these species. The results of the condensed tannin content place Quercus crasifolia (10.29%) and Arbutus xalapensis (13.12%) as potential sources of tannins.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
