จำนวน Repository ( 19 )

ฤทธิ์ต้านอนุมูลอิสระของกุ่มบก
ฤทธิ์ต้านอนุมูลอิสระของกุ่มบก

The aim of this research was determine total phenolic content total flavonoid content and antioxidant activity by DPPH and ABTS assay from leaves flower and stem of Crateva adansonii DC. subsp. trifoliate (Roxb) Jacobs that was extracted by Soxhlet method using ethanol dichloromethane and ethyl acetate as solvent. Leaves extract showed the highest total phenolic content and antioxidant activity. Ethanolic leaf extract showed the highest total phenolic content (157.13±0.32 mg GAE/g extract) and antioxidant activity by DPPH assay (53.64±3.78% (IC50 = 1.49±0.02 mg/ml)) and ABTS assay (76.51±0.97% (IC50 = 0.84±0.01 mg/ml)).When we considering solvent effect found that ethanolic extract showed the highest total phenolic content and antioxidant activity. Total flavonoid content ethyl acetate extract showed the highest total flavonoid content. Total phenolic content significantly correlated with antioxidant activity.

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สารต้านอนุมูลอิสระโดยรวมจากดอกไม้ไทยกินได้
สารต้านอนุมูลอิสระโดยรวมจากดอกไม้ไทยกินได้

Currently in 2020 the world is facing a severe Covid-19 pandemic. More than a 20 million patients were infected and continue spreading the viruses. As a result there has been a huge demand for adequate hand sanitizers in the market especially an alcohol-based spray or gel product. The repeated use of hash formulas containing alcohol having an impact on the skin such as a skin irritant itch dryness an allergic reaction These damaged skin can lead to eczema an inflammatory skin condition. Besides using inappropriate formulation or ingredient in alcohol-based gel products can leave a sticky feeling after using the product. However using a high concentration of alcohol and spray alcohol to avoid this problem is not a suitable solution. Due to alcohol can destroy or inactive viruses takes at least 30 seconds. To reach the level of inactive condition the product should not evaporate too fast. The solve the mentioned problem the semi-gel alcohol-based product was developed by adding the skin moisturizers and Khlu’ s flower extract with high antioxidant activity. According to the result in this research the total phenol content of the flower extract is 3105.44+41.50 GAE mg/L extract whereas the DPPH radical scavenging is 0. 21+ 0. 02 equivalent vitamin C/ ml extract. From the sensory evaluation 20 healthy participated in this research. The majority of participants thought that the developed semi spray-gel product dried quickly and that neither product felt sticky after using. No drying effect on the hands. The product can enhance the moisture on the skin. However the smell needs to be more developed.

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ใยอาหารที่มีสารต้านอนุมูลอิสระจากเปลือกถั่วและการประยุกต์ใช้ในผลิตภัณฑ์อาหาร
ใยอาหารที่มีสารต้านอนุมูลอิสระจากเปลือกถั่วและการประยุกต์ใช้ในผลิตภัณฑ์อาหาร

Foods rich in dietary fiber and antioxidants have attracted great attention to both of consumers and food manufacturers because of their significant health benefits. Increased consumption of dietary fiber improves lowering blood pressure and cholesterol levels. Furthermore it prevent a number of gastrointestinal disorders such as constipation and hemorrhoids. Antioxidants are bioactive compounds that can delay or inhibit the oxidation by inhibiting the initiation or propagation of oxidative chain reactions. These free radical reactions cause human diseases such as cardiovascular disease and cancer. Legumes are an excellent source of compounds having antioxidant. Hence recent research has been focused on the potential utilization of bean coat which was by-products from processing industry to the development of new functional ingredients for food nutrition enrichment. The extraction of bioactive compounds from seed coats are used as a food ingredient for various foods processing such as tofu with soybean hull fiber black bean seed coat in maize flours for the production of cookies and whole wheat bread. Therefore research and development of new functional foods from bean seed coat used as ingredient for the preparation of food products to improve food nutrition will be necessary to provide for Industrial manufacturing according to demand and sufficient for healthy food consumption in the future.

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ฤทธิ์ต้านอนุมูลอิสระของสารสกัดจากมะเดื่อ
ฤทธิ์ต้านอนุมูลอิสระของสารสกัดจากมะเดื่อ

The study used the fruit of Ficus hispida Linn to separation by maceration and sequential extraction method with hexane ethyl acetate and methanol to crude extracts. Crude extracts were assessed for their antioxidant activities tested using DPPH radical scavenging assay total phenolic contents tested using the Folin–Ciocalteu method The results showed that 1. Phytochemical examination of the extracts of F. hispida alkaloids condensed tannins phenolic compounds triterpenes steroids cardiac glycosides anthraquinones 2. Hexane Ethylacetate and Methanol extracts have the ability to reduce the amount of DPPH. The EC50 values were> 1000 285 and 30 g/ml respectively. 3. Hexane Ethylacetate and Methanol extracts contained phenolic compounds values of 3.09 55.25 and 99.59 mg GAE/g dw respectively.

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การศึกษาอุณหภูมิการอบแห้งรกสุกรและการสกัดโปรตีนและฤทธิ์ต้านอนุมูลอิสระ
การศึกษาอุณหภูมิการอบแห้งรกสุกรและการสกัดโปรตีนและฤทธิ์ต้านอนุมูลอิสระ

This research aims to study the appropriate drying condition and extraction solvent for extracting protein and antioxidants from the porcine placenta. Three levels of drying temperature were used in this study which were 50 60 and 70ºC the result shows that the best drying condition for porcine placenta was 70ºC for 4 hours because this condition provided the least drying time and the lowest moisture content of porcine placenta (3.80±3.36% dry basis). After that the fresh and dried porcine placenta were extracted by using three solvents which were deionized water (DI) phosphate buffered saline (PBS) and hexane. The efficiency of extraction was investigated by measuring the crude protein and antioxidant of the porcine placenta. It was found that there was no protein and antioxidant in fresh and dried porcine placenta extracted by hexane. However the protein was found as 0.05±0.01 and 0.04±0.01 mg of bovine serum albumin/100 mg fresh for fresh porcine placenta and 0.12±0.030 and 0.07±0.016 mg of bovine serum albumin/100 mg fresh for dried porcine placenta extracted by DI and PBS respectively. In additional the antioxidant was found as 1.13±0.03 and 1.29±0.04 mg of trolox/100 mg fresh for fresh porcine placenta and 3.37±0.02 and 3.59±0.01 mg of trolox/100 mg fresh for dried porcine placenta extracted using DI and PBS respectively.

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