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Articles by M. Nakornriab
Total Records ( 2 ) for M. Nakornriab
  N. Kaewseejan , D. Puangpronpitag and M. Nakornriab
  Gynura procumbens is one of the important medicinal plants in Thailand and Southeast Asia. It is usually used as a traditional medicine for the treatment of inflammation, herpes simplex virus, rashes, fever, rheumatism, kidney disease, migraines, constipation, diabetes mellitus, cancer and hypertension. The present study was to screen phytochemical compositions of ethanol extract of Gynura procumbens leaves such as chlorophylls, carotenoids, alkaloids, saponins, anthraquinone glycosides, volatile oils as standard methods and to evaluate the antibacterial activity by using agar well diffusion method. Phytochemical analysis revealed the contents of chlorophyll-a, b and carotenoids in ethanolic Gynura extract were 365.20±0.049, 132.40±0.029 and 53.20±0.034 μg g-1 dry weight, respectively. Moreover, the ethanolic Gynura extract showed the presence of alkaloids and volatile oils, whereas saponins and anthraquinone glycosides were absent. According to determination the antibacterial activity was found that Gynura procumbens showed as negative effects in all bacteria’s tested. These results suggest that Gynura extract is a good natural source of bioactive compounds and that they may have beneficial health effects for consumption which may use as preliminary information and could be further studied for uses in food industry, health product, pharmaceutical and medicinal applications.
  K. Chakuton , D. Puangpronpitag and M. Nakornriab
  Rice is one of the important foods of the world. Particularly, countries in Asia are popular eating rice daily food rather than in order regions of the world. Rice is sources of many bioactive non-nutrient compounds, known as phytochemicals. This study aimed to determine phytochemicals value such as, total phenolic compound, total anthocyanin, phytic acid, gamma (γ)-oryzanol composition and antioxidant activity of rice seed extracts of twelve colored and non-colored native Thai rice cultivars in Surin province, Thailand. The results showed that methanolic extracts of those rice seeds produced the highest extraction yield (5.45%). The colored cultivar 53 showed the highest Total Phenolic Content (TPC) and anthocyanins content by Folin-Ciocalteu method and pH-differential, respectively (7.40 mg Gallic Acid Equivalent (GAE)/100 g and 1045.12 mg malvidin/100 g, respectively). Moreover, there is a similarity in the γ-oryzanol content which detected by HPLC, colored rice seed extracts was statistically significant higher (p<0.05) than those non-colored. There were 4 major components of oryzanol (cycloartenol ferulate, 24-methylene cycloartenol ferulate, campesteryl ferulate and β-sitosteryl ferulate) which were successfully identified. Antioxidant activity of rice crude extracts was examined by DPPH scavenging method. Colored rice seed cultivar number 98 showed the highest activity (IC50 = 0.545 mg mL-1). While, phytic acid content in non-colored-rice seed cultivar number 236 showed the highest content (9.94 mg/100 g). From these results suggested to the potential of Thai rice seeds which may be further developed in food industry, cosmetic and health product.
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