@article {532, title = {Pharmacognostic Specification and Mangiferin Content of Aquilaria crassna Leaves.}, journal = {Pharmacog Journal}, volume = {10}, year = {2017}, month = {January-2018}, pages = {293-298}, type = {Original Article}, chapter = {293}, abstract = {

Background:\ Aquilaria\ crassna\ Pierre ex Lecomte (Thymelaeaceae) has been used as a medicinal plant in many aspects. Previous research has revealed that A. crassna leaves contain mangiferin as an active compound. Although the active component has been investigated, the pharmacognostic specification and quantification of mangiferin from A. crassna leaves have never been established. Objective: The current study aimed to conduct and develop a pharmacognostic standard according to WHO guidance as well as the validated method for quantifying mangiferin content. Materials and Methods: Dried A. crassna leaves from 15 separated locations throughout Thailand were investigated for pharmacognostic specification. Their mangiferin contents were quantitatively analysed by TLC densitometry with win CATS software. Results: Macroscopic-, microscopic- characteristics and TLC fingerprinting combined with physicochemical parameters were reported in this study. The loss on drying, moisture content, and total ash content as well as acid-insoluble ash content were determined to be 8.62 \± 0.13, 8.16 \± 0.14, 6.82 \± 0.09 and 1.49 \± 0.03\%, respectively. Ethanol- and waterextractive values were found to be 9.05 \± 0.39 and 16.94 \± 0.22 \%, respectively. In addition, the validation method for quantifying the mangiferin content was developed. The contents of mangiferin in A. crassna leaf extract determined by TLC-densitometry and TLC-image analysis were found to be 1.2992 \± 0.5980 and 1.3036 \± 0.5874 \% by dried weight, respectively. The results between these two analytical methods were shown to have an insignificant difference. Conclusion: This study provides the necessary information for authentication and standardisation of A. crassna leaves.

}, keywords = {Aquilaria crassna leaves, Mangiferin, Pharmacognostic specification, TLC image analysis, TLC-densitometry}, doi = {10.5530/pj.2018.2.51}, url = {http://fulltxt.org/article/481}, author = {Worathat Thitikornpong and Boonsri Ongpipattanakul and Chanida Palanuvej and Nijsiri Ruangrungsi} } @article {1524, title = {Pharmacognostic evaluation and chrysazin quantitation of Xyris indica flowering heads}, journal = {Pharmacognosy Journal}, volume = {6}, year = {2014}, month = {26th May 2014}, pages = {16-22}, type = {Research Article}, abstract = {

Objectives: The present study aimed to establish quality specification of Xyris indica L. flowering heads. The pharmacognostic parameters were investigated. Chrysazin contents were analyzed by TLC image analysis using ImageJ software compared to TLC-densitometry. Methods: X. indica flowering heads from 15 different sources in Thailand were collected. Morphological and physicochemical parameters were characterized. Chrysazin was successively extracted and determined by TLC image analysis using ImageJ software and TLC-densitometry. Results: Macroscopic study was illustrated as whole plant drawing. The microscopic study showed fragment of corolla, seeds, pollen grain and staminode. The pharmacognostic parameters revealed that the loss on drying, total ash, acid-insoluble ash and water content should be not more than 6.90, 2.50, 0.41, and 11.12 of \% dry weight respectively while water and ethanol-soluble extractive values should be not less than 6.59 and 4.03 of \% dry weight respectively. TLC fingerprint revealed clearly chrysazin yellow fluorescent band at 365 nm. Chrysazin quantitation by TLC image analysis and TLC densitometry were developed and validated. Chrysazin content was 0.022 \± 0.001 \% dry weight by both methods. There was no statistically significantly difference between these methods. Conclusion: This study provided pharmacognostic specification and chrysazin content of X. indica flowering heads that can be used for basic quality control and standardization of plant material. TLC image analysis using ImageJ software showed reliable and convenient for analysis of chrysazin content in this crude drug.

Key words: Xyris indica, Pharmacognostic specification, Chrysazin, Quantitative analysis, Antimicrobial activities

}, keywords = {Antimicrobial activities, Chrysazin, Pharmacognostic specification, Quantitative analysis, Xyris indica}, author = {Chuanchom Khuniad and Worathat Thitikornpong and Chanida Palanuvej and Nijsiri Ruangrungsi} }