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太白泡沙参中不同分子质量多糖的分级及其抗氧化活性研究 被引量:5
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作者 陈战国 赵朋飞 李鹏程 《陕西师范大学学报(自然科学版)》 CAS CSCD 北大核心 2010年第6期45-48,共4页
为了考察太白泡沙参中不同分子质量多糖的分布及其抗氧化活性,对太白泡沙参中的总多糖进行分级,并对不同分子质量多糖清除2,2-diphenyl-1-picrylhidrazyl(DPPH)自由基的能力进行了研究.研究结果表明:在所得到的6个多糖组分中,各组分的... 为了考察太白泡沙参中不同分子质量多糖的分布及其抗氧化活性,对太白泡沙参中的总多糖进行分级,并对不同分子质量多糖清除2,2-diphenyl-1-picrylhidrazyl(DPPH)自由基的能力进行了研究.研究结果表明:在所得到的6个多糖组分中,各组分的比例为APK1(842 100)∶APK2(425 800)∶APK3(22 400)∶APK4(12 500)∶APK5(6 500)∶APK6(3 900)=1∶1.4∶2.2∶9.2∶70.6∶23.3(质量比),说明太白泡沙参多糖中分子质量为6 500的组分是主要组分.抗氧化活性试验表明,低分子质量的多糖APK5(6 500)具有很强的清除DPPH自由基的能力,IC50为0.213 mg/mL.这一结果在植物多糖中较为少见,同时佐证太白泡沙参具有多种生物活性. 展开更多
关键词 太白泡沙参 多糖 抗氧化活性 2 2-diphenyl-1-picrylhidrazyl(dpph)
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Comparison of Antioxidant Activities of Silver Nanoparticles and Methanol Extracts of Three Indigenous Nigeria Herbal Seeds
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作者 Prisca Nneka Onuoha Nuria Chinonyerem Oganezi +2 位作者 Christopher Uche Okoronkwo Uzoaga Linda Nkiruka Peter Azikiwe Onwualu 《Food and Nutrition Sciences》 CAS 2022年第7期702-719,共18页
The antioxidant of seeds was carried out using extracts from methanol and Silver Nanoparticles from the spice. The SEM shows the shapes, dispersion and agglomeration of the sample, while the EDX confirms the SEM and t... The antioxidant of seeds was carried out using extracts from methanol and Silver Nanoparticles from the spice. The SEM shows the shapes, dispersion and agglomeration of the sample, while the EDX confirms the SEM and the presence of some compounds. The FT-IR reveals the AgNP<sub>s</sub> capping and reducing the particular biomolecule from the functional group for identification. Compounds found in the FT-IR seeds of Capsicum annum are Ag L (Silver iodide), C K (Cyanogen chloride), P K (Phenol). Monodora myristica are Mo L (Molybdenum), Ag L (Silver iodide), C K (Cyanogen chloride), P K (Phenol), Mg K (Magnesium). Piper guineense are Ag L (Silver iodide), Ci K (Potassium chloride), C K (Cyanogen chloride), P K (Phenol). The seeds show that the AgNP<sub>S</sub> of CA and MM has a better antioxidant activity than the methanol of CA and MM, while the PG methanol has a better activity than the AgNP<sub>S</sub> PG. The control (Catechin and Galic acid) has a slight overall better DPPH activity than the AgNP<sub>S</sub>. It is important to note that there is a concentration dependency in CA, MM AgNP<sub>S,</sub> PG methanol respectively. Notably, at CA methanol, the conc. at 125 was higher than the conc. at 250. Hence, there is need to create a great part in using plant samples for making tabulated or capsulated drugs for treatment of diseases and using plant silver nanoparticles to develop a healthy food/drug preservative package material “smart packaging” that will enhance shelf-life. 展开更多
关键词 Piper guineense (PG) or Uziza Monodora myristica (MM) or Ehuru and Capsicum annum (CA) or Cayenne Pepper Scanning Electron Microscope/Energy Dispersive X-Ray (SEM/EDX) Silver Nanoparticles (AgNPs) Fourier-Transform Infrared (FT-IR) 2 2-diphenyl-1-Picryl-Hydrazyl Radical Scavenging (dpph) Silver Nitrate (AgNO3)
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Exploring the Role of Phytochemicals:Effect of[6]-Gingerol Combined with Colloidal Gold Nanoparticles on Thyroid Carcinoma Cells
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作者 Majid S.Khalaf Marwa Abdul Muhsien Hassan Asmaa Hadi Mohammed 《Nano Biomedicine & Engineering》 2023年第1期36-41,共6页
Gold nanostructure can be manufactured in many forms,such as spherical by using simple chemical method.X-ray powder diffraction(XRD)pattern of gold nanoparticles(AuNPs)was derived from a 400-μL trisodium citrate solu... Gold nanostructure can be manufactured in many forms,such as spherical by using simple chemical method.X-ray powder diffraction(XRD)pattern of gold nanoparticles(AuNPs)was derived from a 400-μL trisodium citrate solution.The diffraction peaks corresponding to the diffraction planes of(111),(200),and(220)were all indexed to the gold with a face-centered cubic structure.The lattice constant calculated from the XRD pattern is 4.078Å,which matches the conventional cubic gold metal diffraction pattern well(Pattern card number(04-784)).The results of scanning electronic microscope show that the biological nanoparticles of gold have asymmetric shapes and different sizes grouped as a circular particle.It was observed that the fashioning of AuNPs increased with increase in the concentration of[6]-gingerol waste extracts.The viability of FTC-133 cells treated for 48 h with various concentrations of[6]-gingerol extract coated with AuNPs(12.5-400 g/mL)was used to determine the cytotoxicity.A dose-dependent reduction in FTC-133 cell viability caused by[6]-gingerol extract capped with Au NPs was substantial(P<0.05),reaching 75%cell mortality at 400 g/mL;the IC_(50)was 90.5%. 展开更多
关键词 colloidal gold 3-[4 5-dimethylthiazol-2-yl]-2 5-diphenyltetrazolium bromide(MTT)cytotoxicity -gingerol 2 2-diphenyl-1-picrylhydrazyl(dpph)
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