Objective:To investigate thein vitroandin vivoeffect of whole plant extracts ofPeristrophe bicalyculataonTrypanosoma brucei brucei-infected rats.Methods:The experiment wasdivided into two phases:In the first phase,the...Objective:To investigate thein vitroandin vivoeffect of whole plant extracts ofPeristrophe bicalyculataonTrypanosoma brucei brucei-infected rats.Methods:The experiment wasdivided into two phases:In the first phase,the anti-trypanosomal activity of the hot water,cold water,methanol and butanol extracts of the whole plant were determined by incubatingwithTrypanosoma brucei brucei.The cold water extract was partially-purified and the anti-trypanosomal activity of the fractions determined.In the second phase,Trypanosoma brucei brucei-infected rats were treated with fraction 2c for nine days.Packed cell volume(PCV),highdensity lipoprotein(HDL),low density lipoprotein(LDL),total cholesterol(TC),triacylglycerol(TAG),aspartate aminotransferase,alanine aminotransferases(ALT),alkaline phosphatase(ALP),total and direct bilirubin levels were determined at the end of the experiment.Results:Cold water extract immobilized 90%of the parasites after 60 min of incubation,and fraction 2ccompletely immobilized the parasites after 35 min.It significantly increased PCV inTrypanosoma brucei brucei-infected rats.Decreased TC,TAG,HDL and LDL levels of infected rats increasedsignificantly when rats were treated with the fraction,while elevated levels of total bilirubinand ALT also decreased.The difference in urea,direct bilirubin and ALP was not significantwhen infected rats were compared to rats in other groups.Conclusions:The ability of the plantto ameliorate the infection-induced biochemical changes calls for detailed investigation of thepotentials of the plant for antitrypanosomiasis drug delivery.展开更多
In this study, the anti-lipidemic effects of combined extracts of Moringa oleifera and Peristrophe bicalyculata in allxoan-induced diabetic rats were investigated. Fifty four (54) adult male albino Wistar rats weighin...In this study, the anti-lipidemic effects of combined extracts of Moringa oleifera and Peristrophe bicalyculata in allxoan-induced diabetic rats were investigated. Fifty four (54) adult male albino Wistar rats weighing between 140-180 g were shared into 5 parallel groups consisting of diabetic (DC) and non-diabetic (NC) groups. Each group consisted of 6 rats. Groups 2-5 were made diabetic using alloxan (150 mg/kg b.w in distil H2O). Except for groups 1 and 2, animals were gavaged at doses of 500 mg/kg b.w for the single dose of extract and 250 mg/kg for the combine extract treatment. Insulin served as a standard drug and was administered at 5IU/kg b.w. The control animal groups (NC, DC) received 0.2 ml of normal saline (placebo) for fourteen (14) consecutive days. Groups treated with extracts showed a significant (p < 0.05) increase in triglyceride (TG), total cholesterol (TC) levels, very low density lipoprotein (VLDL) and low density lipoprotein (LDL mg/dl) concentrations in all treated groups compared to the diabetic control group. No significant (p > 0.05) change was observed in HDL-C level in treated groups when compared to the normal control, diabetic control and insulin groups, suggesting a potential protection against cardiovascular diseases (CVDs) by these plants. No reduction in body weight was observed within the experimental period of 14 days. The results obtained in this study are in agreement with several other research results with these plants and claims by ethno-medical practitioners on the use of Moringa oleifera and Peristrophe bicalyculata in the treatment of hypertension and related CVDs.展开更多
As a promising counterpart of two-dimensional metamaterials,metasurfaces enable to arbitrarily control the wavefront of light at subwavelength scale and hold promise for planar holography and applicable multiplexing d...As a promising counterpart of two-dimensional metamaterials,metasurfaces enable to arbitrarily control the wavefront of light at subwavelength scale and hold promise for planar holography and applicable multiplexing devices.Nevertheless,the degrees of freedom(DoF)to orthogonally multiplex data have been almost exhausted.Compared with state-of-theart methods that extensively employ the orthogonal basis such as wavelength,polarization or orbital angular momentum,we propose an unprecedented method of peristrophic multiplexing by combining the spatial frequency orthogonality with the subwavelength detour phase principle.The orthogonal relationship between the spatial frequency of incident light and the locally shifted building blocks of metasurfaces can be regarded as an additional DoF.We experimentally demonstrate the viability of the multiplexed holograms.Moreover,this newly-explored orthogonality is compatible with conventional DoFs.Our findings will contribute to the development of multiplexing metasurfaces and provide a novel solution to nanophotonics,such as large-capacity chip-scale devices and highly integrated communication.展开更多
基金Supported by Education Trust Fund of Nigeria with the grant number ETF/DESS/AS&D/UNIV/ABU/ZARIA/V2
文摘Objective:To investigate thein vitroandin vivoeffect of whole plant extracts ofPeristrophe bicalyculataonTrypanosoma brucei brucei-infected rats.Methods:The experiment wasdivided into two phases:In the first phase,the anti-trypanosomal activity of the hot water,cold water,methanol and butanol extracts of the whole plant were determined by incubatingwithTrypanosoma brucei brucei.The cold water extract was partially-purified and the anti-trypanosomal activity of the fractions determined.In the second phase,Trypanosoma brucei brucei-infected rats were treated with fraction 2c for nine days.Packed cell volume(PCV),highdensity lipoprotein(HDL),low density lipoprotein(LDL),total cholesterol(TC),triacylglycerol(TAG),aspartate aminotransferase,alanine aminotransferases(ALT),alkaline phosphatase(ALP),total and direct bilirubin levels were determined at the end of the experiment.Results:Cold water extract immobilized 90%of the parasites after 60 min of incubation,and fraction 2ccompletely immobilized the parasites after 35 min.It significantly increased PCV inTrypanosoma brucei brucei-infected rats.Decreased TC,TAG,HDL and LDL levels of infected rats increasedsignificantly when rats were treated with the fraction,while elevated levels of total bilirubinand ALT also decreased.The difference in urea,direct bilirubin and ALP was not significantwhen infected rats were compared to rats in other groups.Conclusions:The ability of the plantto ameliorate the infection-induced biochemical changes calls for detailed investigation of thepotentials of the plant for antitrypanosomiasis drug delivery.
文摘In this study, the anti-lipidemic effects of combined extracts of Moringa oleifera and Peristrophe bicalyculata in allxoan-induced diabetic rats were investigated. Fifty four (54) adult male albino Wistar rats weighing between 140-180 g were shared into 5 parallel groups consisting of diabetic (DC) and non-diabetic (NC) groups. Each group consisted of 6 rats. Groups 2-5 were made diabetic using alloxan (150 mg/kg b.w in distil H2O). Except for groups 1 and 2, animals were gavaged at doses of 500 mg/kg b.w for the single dose of extract and 250 mg/kg for the combine extract treatment. Insulin served as a standard drug and was administered at 5IU/kg b.w. The control animal groups (NC, DC) received 0.2 ml of normal saline (placebo) for fourteen (14) consecutive days. Groups treated with extracts showed a significant (p < 0.05) increase in triglyceride (TG), total cholesterol (TC) levels, very low density lipoprotein (VLDL) and low density lipoprotein (LDL mg/dl) concentrations in all treated groups compared to the diabetic control group. No significant (p > 0.05) change was observed in HDL-C level in treated groups when compared to the normal control, diabetic control and insulin groups, suggesting a potential protection against cardiovascular diseases (CVDs) by these plants. No reduction in body weight was observed within the experimental period of 14 days. The results obtained in this study are in agreement with several other research results with these plants and claims by ethno-medical practitioners on the use of Moringa oleifera and Peristrophe bicalyculata in the treatment of hypertension and related CVDs.
基金supported by the Science and Technology Projects of Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM)No.HRTP202231partially supported by the Agency for Science,Technology,and Research(A*STAR)under AME IRG Grant Nos.A20E5c0095,and CDF Grant No.C210112044。
文摘As a promising counterpart of two-dimensional metamaterials,metasurfaces enable to arbitrarily control the wavefront of light at subwavelength scale and hold promise for planar holography and applicable multiplexing devices.Nevertheless,the degrees of freedom(DoF)to orthogonally multiplex data have been almost exhausted.Compared with state-of-theart methods that extensively employ the orthogonal basis such as wavelength,polarization or orbital angular momentum,we propose an unprecedented method of peristrophic multiplexing by combining the spatial frequency orthogonality with the subwavelength detour phase principle.The orthogonal relationship between the spatial frequency of incident light and the locally shifted building blocks of metasurfaces can be regarded as an additional DoF.We experimentally demonstrate the viability of the multiplexed holograms.Moreover,this newly-explored orthogonality is compatible with conventional DoFs.Our findings will contribute to the development of multiplexing metasurfaces and provide a novel solution to nanophotonics,such as large-capacity chip-scale devices and highly integrated communication.
