A reserved-phase HPLC method was developed for the determination of barbaloin in Aloe vera L. var. chinensis (Haw.) Berger and Aloe barbadensis Miller, and whether there was a close relationship between the contents o...A reserved-phase HPLC method was developed for the determination of barbaloin in Aloe vera L. var. chinensis (Haw.) Berger and Aloe barbadensis Miller, and whether there was a close relationship between the contents of barbaloin and their environments in which they were growing was decided. A Hypersil ODS column (4.6 mm×200 mm, 5 μm)was used with a mobile phase of methanol-water (40:60, containing 0.1% acetic acid), the flow rate being 1.0 mL·min -1, detection wavelength at 359 nm, and the column temperature being 30℃. The linear range of barbaloin was between 0.0726 and 0.726 μg with a correlation coefficient of 0.9998 and the regression equation being Y=1.9202×10 6X-1801.9. Barbaloin was stable in methanol in 48 h and the instrument precision was 1.2% while the method precision was 4.9%. The contents of barbaloin of 12 samples ranged from 6.160 to 319.1 μg·g -1. The method developed was fast and simple with good reproducibility. There was high correlation between the contents of barbaloin and their growing environments.展开更多
分别以库拉索芦荟(Aloe barbadensis Mill.)和中华芦荟(Aloe vera L.var.Chinesis)老叶、中叶、嫩叶的整个叶片及叶片中间凝胶部分为样品,比较2种芦荟不同部位的抗氧化酶活性。结果表明,库拉索芦荟、中华芦荟不同部位抗氧化酶间活性差...分别以库拉索芦荟(Aloe barbadensis Mill.)和中华芦荟(Aloe vera L.var.Chinesis)老叶、中叶、嫩叶的整个叶片及叶片中间凝胶部分为样品,比较2种芦荟不同部位的抗氧化酶活性。结果表明,库拉索芦荟、中华芦荟不同部位抗氧化酶间活性差异较大。库拉索芦荟超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)活性最高部位分别是老叶中间凝胶、中叶整个叶片、老叶整个叶片;中华芦荟SOD、CAT、POD活性最高部位分别是嫩叶中间凝胶、老叶整个叶片、老叶整个叶片。结合生物学产量,开发应用SOD方面,应以2种芦荟中叶中间凝胶为原料;开发应用CAT和POD方面,应以2种芦荟老叶整个叶片为原料。展开更多
Agave salmiana ash and poultry eggshell powder as CaO sources were used for obtaining nanostructured hydro-xyapatite(HAP).The synthesis was carried out by the Green Chemistry Hydrothermal Biosynthesis at 180℃ with a ...Agave salmiana ash and poultry eggshell powder as CaO sources were used for obtaining nanostructured hydro-xyapatite(HAP).The synthesis was carried out by the Green Chemistry Hydrothermal Biosynthesis at 180℃ with a pH of 5,by reacting CaO from Agave Salmiana ash and Eggshell powder,with dibasic caldium phosphate(CaH-PO_(4)+2H_(2)O)in an aqueous solution,with Aloe barbadensis extract.The product was characterized by X-ray dif-fraction,Fourier transform infrared spectroscopy(FT-IR),Scanning Electron Microscopy(SEM),and Transmission Electron Microscopy(TEM).The size and shape of the hydroxyapatite particles changed dramati-cally in the presence of Aloe barbadensis.Large crystals of Hydroxyapatite were observed when Eggshell powder and Agave salmiana ash were used as raw materials in the presence of the Aloe barbadensis surfactant.Crystals with shapes of ribbons and plates from 1 micrometers to 8 micrometers were observed when using the eggshell powder in the presence of Aloe bar badensis and,in the case of Agave salmiana ash in the presence of Aloe bar-badensis,crystals with shapes of quadra ngular prisms and hexagonal(polyhedra)with sizes from 2 micrometers to 20 micrometers were observed.Hydroxyapatite was therefore successfully biosynthesized by a green and sus-tainable method that reduces the environmental impact.展开更多
文摘A reserved-phase HPLC method was developed for the determination of barbaloin in Aloe vera L. var. chinensis (Haw.) Berger and Aloe barbadensis Miller, and whether there was a close relationship between the contents of barbaloin and their environments in which they were growing was decided. A Hypersil ODS column (4.6 mm×200 mm, 5 μm)was used with a mobile phase of methanol-water (40:60, containing 0.1% acetic acid), the flow rate being 1.0 mL·min -1, detection wavelength at 359 nm, and the column temperature being 30℃. The linear range of barbaloin was between 0.0726 and 0.726 μg with a correlation coefficient of 0.9998 and the regression equation being Y=1.9202×10 6X-1801.9. Barbaloin was stable in methanol in 48 h and the instrument precision was 1.2% while the method precision was 4.9%. The contents of barbaloin of 12 samples ranged from 6.160 to 319.1 μg·g -1. The method developed was fast and simple with good reproducibility. There was high correlation between the contents of barbaloin and their growing environments.
文摘分别以库拉索芦荟(Aloe barbadensis Mill.)和中华芦荟(Aloe vera L.var.Chinesis)老叶、中叶、嫩叶的整个叶片及叶片中间凝胶部分为样品,比较2种芦荟不同部位的抗氧化酶活性。结果表明,库拉索芦荟、中华芦荟不同部位抗氧化酶间活性差异较大。库拉索芦荟超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)活性最高部位分别是老叶中间凝胶、中叶整个叶片、老叶整个叶片;中华芦荟SOD、CAT、POD活性最高部位分别是嫩叶中间凝胶、老叶整个叶片、老叶整个叶片。结合生物学产量,开发应用SOD方面,应以2种芦荟中叶中间凝胶为原料;开发应用CAT和POD方面,应以2种芦荟老叶整个叶片为原料。
基金The funding was provided by Project CE1645-21 PAICYTUANL.
文摘Agave salmiana ash and poultry eggshell powder as CaO sources were used for obtaining nanostructured hydro-xyapatite(HAP).The synthesis was carried out by the Green Chemistry Hydrothermal Biosynthesis at 180℃ with a pH of 5,by reacting CaO from Agave Salmiana ash and Eggshell powder,with dibasic caldium phosphate(CaH-PO_(4)+2H_(2)O)in an aqueous solution,with Aloe barbadensis extract.The product was characterized by X-ray dif-fraction,Fourier transform infrared spectroscopy(FT-IR),Scanning Electron Microscopy(SEM),and Transmission Electron Microscopy(TEM).The size and shape of the hydroxyapatite particles changed dramati-cally in the presence of Aloe barbadensis.Large crystals of Hydroxyapatite were observed when Eggshell powder and Agave salmiana ash were used as raw materials in the presence of the Aloe barbadensis surfactant.Crystals with shapes of ribbons and plates from 1 micrometers to 8 micrometers were observed when using the eggshell powder in the presence of Aloe bar badensis and,in the case of Agave salmiana ash in the presence of Aloe bar-badensis,crystals with shapes of quadra ngular prisms and hexagonal(polyhedra)with sizes from 2 micrometers to 20 micrometers were observed.Hydroxyapatite was therefore successfully biosynthesized by a green and sus-tainable method that reduces the environmental impact.
