@article {2158, title = {Effect of Plant Stage and Solvent Extraction on Catechin Contents in Borrasus flabellifer L. Male Flower}, journal = {Pharmacognosy Journal}, volume = {15}, year = {2023}, month = {December 2023}, pages = {1036-1041}, type = {Original Article}, chapter = {1036}, abstract = {

Borrasus flabellifer L. is a plant in the Arecaceae (Palmae) family with numerous bioactivities such as diuretic promotion, antioxidant, and antimicrobial effects. In this study, we are interested in the phytochemical compounds present in B. flabellifer L. male flowers. We investigated the effects of plant stage and solvent used for extraction. Initially, both the young and mature male flowers of this plant were extracted using water or ethanol. Several standard compounds, including gallic acid, catechin, caffeic acid, and quercetin, were utilized to screen the phytochemicals in these plant flowers. After analyzing the samples using High-Performance Liquid Chromatography (HPLC) method, only catechin was detected in all extracts, while the others were not detected (did not match the peak spectrum pattern compared with standard). Using a detection wavelength and curve parameters with an R2 value of 0.9999, catechin detection via HPLC was performed at 280 nm within the range of 13.12 to 210.00 {\textmu}g/mL detection. Regarding the stage of the male flower, the young ones extracted with water provided the highest catechin content at 6.65 {\textmu}g/mg extract, while the others fell within the range of 4.02 to 4.44 {\textmu}g/mg extract. Therefore, it has been confirmed that catechin can be found in B. flabellifer L., and water should be used as the solvent for extraction for further applications of this plant.

}, keywords = {Borrasus flabellifer L., Catechin, HPLC, Male flower, Mature, Young}, doi = {10.5530/pj.2023.15.190}, author = {Chayut Fongsuk and Patnaree Wongmanit and Kanoktip Pansuksan} } @article {492, title = {Antidiabetic Activity Studies of White Tea (Camellia sinensis (L.) O. Kuntze) Ethanolic Extracts in Streptozotocin-nicotinamide Induced Diabetic Rats}, journal = {Pharmacognosy Journal}, volume = {10}, year = {2018}, month = {December 2017}, pages = {186-189}, type = {Original Article}, chapter = {186}, abstract = {

Background: The high polyphenol content of white tea exhibits antiseptic and antioxidant properties that can prevent free radicals, inhibit oxidative stress and inflammation associated with various diseases such as obesity, diabetes and other degenerative diseases. Oral administration of white tea ethanolic extract (WTE) is expected to use as an alternative in the treatment of diabetes mellitus. Objective: This study aims to evaluate the effect of WTE on reducing fasting blood glucose levels in diabetic rats. Methods: Antidiabetic activity study of white tea extract performed on diabetic Sprague-Dawley male rats induced streptozotocin-nicotinamide for 14 days of oral administration. The antidiabetic effect compared to normal control, diabetic control, and standard control groups. Results: The administration of WTE for 14 days showed decreased fasting blood glucose level in diabetic rats. The dose of 100 mg/kg BW of WTE has the highest effect on reducing fasting glucose level significantly compared to negative control group (p\<0.05). The content of flavonoids, especially catechin compounds are suspected to play a role in lowering fasting blood glucose levels. Conclusion: The administration of WTE for 14 days has potentially antidiabetic activity in diabetic rats induced streptozotocin-nicotinamide.

}, keywords = {Antidiabetic, Camellia sinensis, Catechin, Hypoglycemic, Streptozotocin, White tea}, doi = {10.5530/pj.2018.1.31}, url = {http://fulltxt.org/article/417}, author = {Lia Ardiana and Rani Sauriasari and Berna Elya} }