จำนวน Repository ( 28 )
การพัฒนาแผ่นเส้นใยอิเล็คโทรสปันจากโปรตีนไหมซิริซิน สารสกัดรางจืด และสารสกัดหญ้าหางม้าสำหรับประยุกต์เป็นแผ่นปิดแผล
In this work fiber mat based on silk sericin and thunbergia laurifolia linn extract was developed via electrospinning technique for wound dressing application. The waste cocoons were selected from Nakhon Ratchasima 1 (K1) with appropriate spicy for extracting the silk sericin protein. Trunk of thunbergia laurifolia linn was selected for preparing thunbergia laurifolia linn extract. Polyvinyl alcohol (PVA) with several concentrations were chose and fabricated to fibers by electrospinning technique to investigate suitable polymer concentration for mixing silk sericin and thunbergia laurifolia linn extract. The result revealed that PVA of 9 wt % was suitable due to Several parameters were investigated to prepare the electrospun fiber of silk sericin and thunbergia laurifolia linn extract such as their mixing ratio voltage the distance between the needle and the substrate and the needle size. The results indicated that mixing ratio of silk sericin and thunbergia laurifolia linn extract at 50:50 (w/w) voltage of 15 kV the distance of the needle and the substrate at 8 cm and the needle size of 18 were optimum condition for the fabrication of electrospun fiber with diameter of 100-200 nm and that with smooth and continue feature.
การสกัดและฤทธิ์ทางชีวภาพของสารสกัดจากตะบูน
Research project on extraction and bioactivity of Xylocarpus granatum extracts. This study aimed to investigate the phytochemicals and antioxidant activities of the X. granatum extract. The fruits of X. granatum was separation by maceration and sequential extraction method with hexane ethyl acetate and methanol to crude extracts. Crude extracts were assessed for their total phenolic contents tested using the Folin–Ciocalteu method and antioxidant activities tested using DPPH radical scavenging assay. The results showed that 1. Phytochemical examination of the extracts of X. granatum included alkaloids condensed tannins phenolic compounds triterpenes steroids cardiac glycosides and anthraquinones. 2 . The crude methanol extract had the highest phenolic content was 96.55 mg GAE /g dw. 3. The crude methanol extract could reduce DPPH; The EC50 was 34 μg/ ml
การศึกษาพฤกษเคมีและฤทธิ์ทางชีวภาพของสารสกัดจากมะพอกที่มีผลต่อการเจริญเติมโดของวัชพืชในนาข้าวเพื่อสนับสนุนการใช้ประโยชน์และเพิ่มมูลค่าความหลากหลายทางชีวภาพอย่างมั่นคงและยั่งยืน
This research aims to study phytochemicals and potential of Mapok (Parinari anamense Hance) extracts to inhibit germination and growth of Barnyard grass (Echinochloa crus-galli) a common weed in the rice fields. Organic solvents extracted the part of fruits barks and leaves of Mapok included hexane ethyl acetate and methanol. Crude extracts compose of fruit hexane extract fruit ethyl acetate extract fruit methanol extract bark hexane extract bark ethyl acetate extract bark methanol extract leaves hexane extract leaves ethyl acetate extract and leave methanol extract. Crude extracts were tested of phytochemical tested of germinating inhibition root length inhibition stem length inhibition and dry weight inhibition of Barnyard grass. Leaves ethyl acetate extract showed highest inhibit germination and growth of Barnyard grass The leave ethyl acetate extract was separated by column chromatography to yield nine fractions (F1 – F9 fraction) and tested inhibit germination and growth repeating. The results showed that 1. The crude ethyl acetate extracts from the bark of Mapok at a concentration of 3000 ppm showed the highest inhibited percentage of germinating inhibition root length inhibition stem length inhibition and dry weight inhibition. 2. Fraction F8 of leaves ethyl acetate extract showed the highest inhibited percentage of germinating inhibition root length inhibition stem length inhibition and dry weight inhibition.
พฤกษเคมีและกิจกรรมยับยั้งเอนไซม์แซนทีนออกซิเดสของสารสกัดจากผลมะม่วงหาวมะนาวโห่
The Thai wisdom knows the benefits of Carissa carandas L. to be used as a traditional herbal medicine. However there was no scientific evidence to show that Carissa carandas L. of Thailand can treat gout or not. In this research the Carissa carandas L. fruit extract in semi-ripening and ripe stage were studied for the phytochemical and inhibitory activity of xanthine oxidase one of the causes of gout. The result of hytochemical indicated that the crude extract from semi-ripening stage fruit contained many substances; phenolic compounds alkaloids flavonoids terpenoids saponins and deoxy sugars. While the ripe stage fruit contained the similar substances excepted saponins. The extract solution of Carissa carandas L. showed the xanthine oxidase inhibitory activity as the ethanolic extract solution gave the higher activity than water extract solution. The crude extracts of semi-ripening stage fruit presented the higher activity than the ripe stage one with the IC 50 values of 2.40 ± 0.05 and 2.87 ± 0.37 mg/mL respectively. The result of ripening stage with different phytochemical may be related to inhibition of xanthine oxidase activity. Therefore the selecting of sampling period and purification of extract may be a choice for using as medicine for gout
บรรจุภัณฑ์ชานอ้อยต้านเชื้อราด้วยสารสกัดจากขมิ้นชันสำหรับเพาะผักสลัดกรีนคอส
The purpose of this research was to develop bagasse packaging antagonizing fungi with turmeric extract for Green Cos Lettuce cultivation. The bagasse package would incorporated with fungistatic turmeric extract instead of using chemicals at concentrations 0 5000 10000 15000 and 20000 ppm. The packaging characteristics efficiency of turmeric extract and the growth of Green Cos Lettuce determined into the percentage of germination height measurement fungi contamination characteristic were tested under the presence and absent antifungal bagasse The plant seedling spreading onto the surface of the packaging with turmeric extracts could be excelled for -their growth with the induction of germination rate of 92-97 percentages. Turmeric extracts at concentrations of 15000 and 20000 ppm had also expel the emergence of Penicillum sp. inhibit Rhizopus sp. and slow down Colletotrichum sp. Moreover the turmeric extract caused packaging decaying by itself slowly possibly helping in common airborne mold prevention. This green safe material showed the respectably effective for Green Cos Lettuce seedling especially for the fungal pathogen contamination during implantations. This research based on using natural extracts and natural fibers from agricultural waste is thus being ecofriendly nonchemical application of packaging product with easily digested for decent consumers who love their health and care environment.