A promising biomass carbon material,manufactured by the carbonation of Physalis peruviana L.calyx at 700℃,is presented in this wo rk.Morphology characterization shows that the carbon material possesses long microtubu...A promising biomass carbon material,manufactured by the carbonation of Physalis peruviana L.calyx at 700℃,is presented in this wo rk.Morphology characterization shows that the carbon material possesses long microtubule bundling and above 30%natural O-atom component on the surface.After KOH chemical etching,the materials maintain the oxygen content but exhibit more micropores and higher specific surface area up to 1732.6 m^2/g.Using as an electrode material for supercapacitor,the active carbon material exhibits high specific capacitance up to 339.7 F/g at 0.5 A/g in 3 mol/L KOH aqueous solution through three-electrode system.The active carbon material also exhibits excellent cycling stability(97%retention)by 10,000 cycles at 10 A/g.The outstanding electrochemical performances are attributing to the unique long microtubule bundling with much more pores and the abundant Oelement on the surface.This biomass carbon material with excellent electrochemical properties could be a useful material for multiple applications.展开更多
Objective:To verify the antidiabetic activity of leaf extracts from Physalis peruviana L.popularly used in the Eastern part of the Democratic Republic of the Congo and to point out the possible toxicity.Method:Aqueous...Objective:To verify the antidiabetic activity of leaf extracts from Physalis peruviana L.popularly used in the Eastern part of the Democratic Republic of the Congo and to point out the possible toxicity.Method:Aqueous decoctions prepared from dried leaves powder were administrated to guinea pigs at the dose range of 100 mg/kg to 3.2 g/kg of body weight.The hypoglycemic activity was evaluated by glucose tolerance test,loading animals with glucose 4 g/kg and measuring blood glucose concentrations at various times.The effect was compared to the control and glibenclamide as antidiabetic reference drug.Acute toxicity was evaluated by recording mortality rate,changes on blood biomarkers and damage caused to vital organs.Results:At a dose of 100 mg/kg,the aqueous extract induced a significant reduction of peak concentration at 30 min after glucose loading as compared with control or reference(P<0.05).At doses greater than 400 mg,some alterations on blood,kidney and liver markers were observed.Upper 800 mg/kg,mortality was observed with LD_(50)estimated at about 1280 mg/kg.At the autopsy,vital organs were in haemorrhage and swelling state.Conclusion:The crude aqueous extracts from the leaves of Physalis peruviana L.present hypoglycemic aclivily in animal model,but at high doses the plant may cause severe intoxication.展开更多
A native plant of Biome Pampa (Southern Brazil), the Glandularia peruviana (L.) Small species has been, until now, little studied as ornamental plant for use as mulch and formation of massifs. Whilst this species didn...A native plant of Biome Pampa (Southern Brazil), the Glandularia peruviana (L.) Small species has been, until now, little studied as ornamental plant for use as mulch and formation of massifs. Whilst this species didn’t suffer any genetic improvement process, it is extremely ornamental by its color and size. In order to promote its comercial propagation and its use to improve the Pampa biodiversity, this study was conducted to know, as a ruderal plant native from South America, how the behavior of the plants was when employed plant propagation and use of artificial auxin on the cuttings. The test consisted of assessing the growth of cuttings treated or not with indol-butyric acid, analyzed at diferent ages, at 21, 24, 27 and 31 days in the University of Passo Fundo, Passo Fundo, Brazil. It was observed that the plant total dry mass values showed no standard of behavior, values for dry matter, whether of leaves, stem, root, shoot and total not responded to treatments and analyzed ages. The same occurred for specific leaf weight, plant height, number of green leaves, number of dead leaves, average leaf length and average number of stems. The lack of significant treatment and age effects may be explained by the plant primitiveness, which is ruderal, so its development has little influenced by the propagation practices.展开更多
We present an atypical case of disseminated cutaneous leishmaniasis in the Sihuas district, located in the Andean valleys of Ancash-Peru. A 62-year-old man with no particular medical history presented multiple lesions...We present an atypical case of disseminated cutaneous leishmaniasis in the Sihuas district, located in the Andean valleys of Ancash-Peru. A 62-year-old man with no particular medical history presented multiple lesions located on the inferior abdomen, lumbar region and the right anterior thigh. Histological analysis found leishmanial amastigotes in the lesion sample, the Montenegro reaction was positive for Leishmania spp, and the polymerase chain reaction was positive for Leishmania peruviana. In conclusion, the atypical presentation of this disease may be related to the presence of an uncommon parasite strain or host immune deficiencies. The molecular identification of the etiology for disseminated leishmaniasis, will allow a better understanding of the presentation and proper treatment,as well as associated risk factors.展开更多
基金Hebei Natural Science Foundation(No.B2015203259)Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),College of Chemistry,Nankai University for providing the financial support for this project。
文摘A promising biomass carbon material,manufactured by the carbonation of Physalis peruviana L.calyx at 700℃,is presented in this wo rk.Morphology characterization shows that the carbon material possesses long microtubule bundling and above 30%natural O-atom component on the surface.After KOH chemical etching,the materials maintain the oxygen content but exhibit more micropores and higher specific surface area up to 1732.6 m^2/g.Using as an electrode material for supercapacitor,the active carbon material exhibits high specific capacitance up to 339.7 F/g at 0.5 A/g in 3 mol/L KOH aqueous solution through three-electrode system.The active carbon material also exhibits excellent cycling stability(97%retention)by 10,000 cycles at 10 A/g.The outstanding electrochemical performances are attributing to the unique long microtubule bundling with much more pores and the abundant Oelement on the surface.This biomass carbon material with excellent electrochemical properties could be a useful material for multiple applications.
基金"The International Foundation for Science(IFS)""the Organization for the Prohibition of Chemical Weapons(OPCW)"for the fellowship No.F/4921-2
文摘Objective:To verify the antidiabetic activity of leaf extracts from Physalis peruviana L.popularly used in the Eastern part of the Democratic Republic of the Congo and to point out the possible toxicity.Method:Aqueous decoctions prepared from dried leaves powder were administrated to guinea pigs at the dose range of 100 mg/kg to 3.2 g/kg of body weight.The hypoglycemic activity was evaluated by glucose tolerance test,loading animals with glucose 4 g/kg and measuring blood glucose concentrations at various times.The effect was compared to the control and glibenclamide as antidiabetic reference drug.Acute toxicity was evaluated by recording mortality rate,changes on blood biomarkers and damage caused to vital organs.Results:At a dose of 100 mg/kg,the aqueous extract induced a significant reduction of peak concentration at 30 min after glucose loading as compared with control or reference(P<0.05).At doses greater than 400 mg,some alterations on blood,kidney and liver markers were observed.Upper 800 mg/kg,mortality was observed with LD_(50)estimated at about 1280 mg/kg.At the autopsy,vital organs were in haemorrhage and swelling state.Conclusion:The crude aqueous extracts from the leaves of Physalis peruviana L.present hypoglycemic aclivily in animal model,but at high doses the plant may cause severe intoxication.
文摘A native plant of Biome Pampa (Southern Brazil), the Glandularia peruviana (L.) Small species has been, until now, little studied as ornamental plant for use as mulch and formation of massifs. Whilst this species didn’t suffer any genetic improvement process, it is extremely ornamental by its color and size. In order to promote its comercial propagation and its use to improve the Pampa biodiversity, this study was conducted to know, as a ruderal plant native from South America, how the behavior of the plants was when employed plant propagation and use of artificial auxin on the cuttings. The test consisted of assessing the growth of cuttings treated or not with indol-butyric acid, analyzed at diferent ages, at 21, 24, 27 and 31 days in the University of Passo Fundo, Passo Fundo, Brazil. It was observed that the plant total dry mass values showed no standard of behavior, values for dry matter, whether of leaves, stem, root, shoot and total not responded to treatments and analyzed ages. The same occurred for specific leaf weight, plant height, number of green leaves, number of dead leaves, average leaf length and average number of stems. The lack of significant treatment and age effects may be explained by the plant primitiveness, which is ruderal, so its development has little influenced by the propagation practices.
基金supported by the Programa Nacional de Innovación para la Competitividad y Productividad(Innóvate Perú)under the contract116-PNICP-PIAP-2015
文摘We present an atypical case of disseminated cutaneous leishmaniasis in the Sihuas district, located in the Andean valleys of Ancash-Peru. A 62-year-old man with no particular medical history presented multiple lesions located on the inferior abdomen, lumbar region and the right anterior thigh. Histological analysis found leishmanial amastigotes in the lesion sample, the Montenegro reaction was positive for Leishmania spp, and the polymerase chain reaction was positive for Leishmania peruviana. In conclusion, the atypical presentation of this disease may be related to the presence of an uncommon parasite strain or host immune deficiencies. The molecular identification of the etiology for disseminated leishmaniasis, will allow a better understanding of the presentation and proper treatment,as well as associated risk factors.
