Objective:To evaluate the antifertility activity of hydroalcoholic extract of Delonix regia(Boj.ex Hook.)Raf.leaves and seeds which are traditionally being used by Yanadi tribe to treat dysmenorrhea.Methods:Three expe...Objective:To evaluate the antifertility activity of hydroalcoholic extract of Delonix regia(Boj.ex Hook.)Raf.leaves and seeds which are traditionally being used by Yanadi tribe to treat dysmenorrhea.Methods:Three experimental animal models,including anti-implantation,early abortifacient,and estrogenic activity in female rats,were used for evaluation of the antifertility activity of both extracts at two dose levels(250 and 500 mg/kg,orally).There were five groups in the anti-implantation and early abortifacient activity while six groups in estrogenic activity including the standard.The number of implants,resorptions,vaginal cornification,body weight,uterus weight,and biochemical parameters were measured.Results:At doses 250 and 500 mg/kg,the leaf extract was found to have strong anti-implantation action.The extract administered at the same doses also caused a significant rise in the number of resorptions,showing early abortifacient activity,increased uterine weight,and altered numerous biochemical parameters.Meanwhile,the seed extract only displayed slight anti-implantation activity at both levels.Conclusions:Based on these preliminary findings,we can conclude that the leaf extract outperformed the seed extract in terms of antifertility activity,exhibiting potent estrogenic,anti-implantation and early abortifacient activities in a dose-dependent manner.These findings are consistent with the literature study and corroborate to the antifertility activity of the plant.展开更多
The adsorption capacity of steam activated carbon prepared from Delonix regia pods SADRC for adsorption of Aniline Blue (AB) from aqueous solution was investigated under various experimental conditions. Batch study wa...The adsorption capacity of steam activated carbon prepared from Delonix regia pods SADRC for adsorption of Aniline Blue (AB) from aqueous solution was investigated under various experimental conditions. Batch study was conducted to assess the potential of the activated carbon for the removal of Aniline Blue from aqueous solution. Activated carbon prepared from Delonix regia pods was characterized using Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FTIR) Spectrophotometry before and after adsorption. The FTIR, spectra of SADRC pod before and after Aniline Blue adsorption were compared to study the impact of the Aniline Blue on the activated carbon developed from the Delonix regia pod. The stretching vibration band at 2169.54 cm-1 may be due to strong CN, while the stretching vibration band at around 1580 - 1650 cm-1 may be due to C=C stretching vibration. The bands around 1350 and 426.49 cm-1 are due to C-N and –SO3H group, respectively;this further suggests that some functional groups may be present on the surface of the carbon due to the low temperature of carbonization (300°C) of the adsorbent. Equilibrium isotherm studies were carried out by varying the following four parameters: initial concentration of Aniline Blue dye solution, solution pH and adsorbent dose. The equilibrium data obtained were more fitted to Langmuir than Freundlich isotherm models. The correlation coefficient value (R2) of the pseudo first order kinetics ranged from 0.08 to 0.85 while the R2 of the pseudo second order kinetics ranged from 0.963 to 0.997 at all the temperatures and initial concentrations considered. This suggests that the adsorption kinetics of Aniline Blue onto SADRC can be represented with pseudo second order kinetic model. This study showed that Delonix regia pod could be effectively used as an adsorbent for the removal of Aniline Blue from aqueous solutions over a wide range of concentration and temperature.展开更多
Batch adsorption techniques were used to study the biosorption of Lead and Nickel from aqueous solutions by Flame of the forest pods. The effects of optimum pH, contact time, metal ion concentration, biosorbent dose, ...Batch adsorption techniques were used to study the biosorption of Lead and Nickel from aqueous solutions by Flame of the forest pods. The effects of optimum pH, contact time, metal ion concentration, biosorbent dose, biosorbent particle size and the presence of sodium, calcium and magnesium interfering ions on the sorption were investigated. Experimental results showed that Delonix regia biomass was effective in removing these metals from aqueous solutions as the equilibrium biosorption of both metals was attained within 60 minutes of interaction with 98% of the metals removed within this period. Sorption of these metals was dependent on pH as maximum removal was attained at pH 4 and pH 5 for Lead and Nickel ions respectively. Adsorption experiments showed that the process followed the pseudo second order kinetic model with high r2 (0.9999) and the equilibrium data fitted well with Langmuir and Freundlich isotherm models. The presence of competing ions impacted negatively on the sorption process irrespective of the type used. 27% and 36% of lead (II) were recovered from the spent biosorbents with 1 MHCl and disodium salt of EDTA solutions respectively.展开更多
The suitability of two common and ubiquitously distributed and exotic ornamental plant species in Nigeria-Delonix regia and Casuarina equisetifolia as biomonitors and as effective bioaccumulators of atmospheric trace ...The suitability of two common and ubiquitously distributed and exotic ornamental plant species in Nigeria-Delonix regia and Casuarina equisetifolia as biomonitors and as effective bioaccumulators of atmospheric trace metals （Cd, Pb, Zn and Cu） has been evaluated. Bark and leaf samples from these plant species were collected in June and July 2006 at five locations in Benin City. Four of the sampling sites were in areas of high traffic density and commercial activities, the fifth site is a remote site, selected to act as a control and also to provide background information for the metals. The plant samples were collected and processed using standard procedures and trace metals were determined using atomic absorption spectrometer. The bark of the plants was able to bioaccumulate the trace metals, especially Pb which originates from anthropogenic contributions in the city. The Pb range of 20.00-70.00 μg/g measured for the bark samples ofD. regia, exceeded the normal plant Pb concentration of 0.2-20.0 μg/g and most Pb data available in literature. The bark of the plants was observed to accumulate more metals compared to the leave, while D. regia was found to be slightly better than C. equisetifolia in trace metal uptake efficiency. Spatial variations in the distributions of Pb and Zn were significant （p 〈 0.05）, and the continuous use of leaded fuel in Nigeria was identified as the predominant source of Pb in the atmosphere.展开更多
Delonix regia （Bojer ex Hook） Raffin （Fabaceae）, also known as flame of forest, is a semi-deciduous tree, distributed throughout Madagascar, India, Africa, and Northern Australia. Various parts of the plant are tr...Delonix regia （Bojer ex Hook） Raffin （Fabaceae）, also known as flame of forest, is a semi-deciduous tree, distributed throughout Madagascar, India, Africa, and Northern Australia. Various parts of the plant are traditionally used for the treatment of different ailments such as inflammation, rheumatism, bronchitis, diabetes, anemia, fever, gynecological disorders, and pneumonia. The plant possess antioxidant, hepatoprotective, gastroprotective, wound healing, antiarthritic, larvicidal, antimalarial, antiemefic, antibacterial, antifungal, antiinflammatory, analgesic, antidiarrhoeal, antiheamolytic, diuretic, and anthelmintic activities. This review is an up-to-date compilation on its traditional uses in context to phytochemical and pharmacological perspectives.展开更多
文摘Objective:To evaluate the antifertility activity of hydroalcoholic extract of Delonix regia(Boj.ex Hook.)Raf.leaves and seeds which are traditionally being used by Yanadi tribe to treat dysmenorrhea.Methods:Three experimental animal models,including anti-implantation,early abortifacient,and estrogenic activity in female rats,were used for evaluation of the antifertility activity of both extracts at two dose levels(250 and 500 mg/kg,orally).There were five groups in the anti-implantation and early abortifacient activity while six groups in estrogenic activity including the standard.The number of implants,resorptions,vaginal cornification,body weight,uterus weight,and biochemical parameters were measured.Results:At doses 250 and 500 mg/kg,the leaf extract was found to have strong anti-implantation action.The extract administered at the same doses also caused a significant rise in the number of resorptions,showing early abortifacient activity,increased uterine weight,and altered numerous biochemical parameters.Meanwhile,the seed extract only displayed slight anti-implantation activity at both levels.Conclusions:Based on these preliminary findings,we can conclude that the leaf extract outperformed the seed extract in terms of antifertility activity,exhibiting potent estrogenic,anti-implantation and early abortifacient activities in a dose-dependent manner.These findings are consistent with the literature study and corroborate to the antifertility activity of the plant.
文摘The adsorption capacity of steam activated carbon prepared from Delonix regia pods SADRC for adsorption of Aniline Blue (AB) from aqueous solution was investigated under various experimental conditions. Batch study was conducted to assess the potential of the activated carbon for the removal of Aniline Blue from aqueous solution. Activated carbon prepared from Delonix regia pods was characterized using Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FTIR) Spectrophotometry before and after adsorption. The FTIR, spectra of SADRC pod before and after Aniline Blue adsorption were compared to study the impact of the Aniline Blue on the activated carbon developed from the Delonix regia pod. The stretching vibration band at 2169.54 cm-1 may be due to strong CN, while the stretching vibration band at around 1580 - 1650 cm-1 may be due to C=C stretching vibration. The bands around 1350 and 426.49 cm-1 are due to C-N and –SO3H group, respectively;this further suggests that some functional groups may be present on the surface of the carbon due to the low temperature of carbonization (300°C) of the adsorbent. Equilibrium isotherm studies were carried out by varying the following four parameters: initial concentration of Aniline Blue dye solution, solution pH and adsorbent dose. The equilibrium data obtained were more fitted to Langmuir than Freundlich isotherm models. The correlation coefficient value (R2) of the pseudo first order kinetics ranged from 0.08 to 0.85 while the R2 of the pseudo second order kinetics ranged from 0.963 to 0.997 at all the temperatures and initial concentrations considered. This suggests that the adsorption kinetics of Aniline Blue onto SADRC can be represented with pseudo second order kinetic model. This study showed that Delonix regia pod could be effectively used as an adsorbent for the removal of Aniline Blue from aqueous solutions over a wide range of concentration and temperature.
文摘Batch adsorption techniques were used to study the biosorption of Lead and Nickel from aqueous solutions by Flame of the forest pods. The effects of optimum pH, contact time, metal ion concentration, biosorbent dose, biosorbent particle size and the presence of sodium, calcium and magnesium interfering ions on the sorption were investigated. Experimental results showed that Delonix regia biomass was effective in removing these metals from aqueous solutions as the equilibrium biosorption of both metals was attained within 60 minutes of interaction with 98% of the metals removed within this period. Sorption of these metals was dependent on pH as maximum removal was attained at pH 4 and pH 5 for Lead and Nickel ions respectively. Adsorption experiments showed that the process followed the pseudo second order kinetic model with high r2 (0.9999) and the equilibrium data fitted well with Langmuir and Freundlich isotherm models. The presence of competing ions impacted negatively on the sorption process irrespective of the type used. 27% and 36% of lead (II) were recovered from the spent biosorbents with 1 MHCl and disodium salt of EDTA solutions respectively.
文摘The suitability of two common and ubiquitously distributed and exotic ornamental plant species in Nigeria-Delonix regia and Casuarina equisetifolia as biomonitors and as effective bioaccumulators of atmospheric trace metals （Cd, Pb, Zn and Cu） has been evaluated. Bark and leaf samples from these plant species were collected in June and July 2006 at five locations in Benin City. Four of the sampling sites were in areas of high traffic density and commercial activities, the fifth site is a remote site, selected to act as a control and also to provide background information for the metals. The plant samples were collected and processed using standard procedures and trace metals were determined using atomic absorption spectrometer. The bark of the plants was able to bioaccumulate the trace metals, especially Pb which originates from anthropogenic contributions in the city. The Pb range of 20.00-70.00 μg/g measured for the bark samples ofD. regia, exceeded the normal plant Pb concentration of 0.2-20.0 μg/g and most Pb data available in literature. The bark of the plants was observed to accumulate more metals compared to the leave, while D. regia was found to be slightly better than C. equisetifolia in trace metal uptake efficiency. Spatial variations in the distributions of Pb and Zn were significant （p 〈 0.05）, and the continuous use of leaded fuel in Nigeria was identified as the predominant source of Pb in the atmosphere.
文摘Delonix regia （Bojer ex Hook） Raffin （Fabaceae）, also known as flame of forest, is a semi-deciduous tree, distributed throughout Madagascar, India, Africa, and Northern Australia. Various parts of the plant are traditionally used for the treatment of different ailments such as inflammation, rheumatism, bronchitis, diabetes, anemia, fever, gynecological disorders, and pneumonia. The plant possess antioxidant, hepatoprotective, gastroprotective, wound healing, antiarthritic, larvicidal, antimalarial, antiemefic, antibacterial, antifungal, antiinflammatory, analgesic, antidiarrhoeal, antiheamolytic, diuretic, and anthelmintic activities. This review is an up-to-date compilation on its traditional uses in context to phytochemical and pharmacological perspectives.
