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Fate of rubber bush (Calotropis procera (Aiton) W. T. Aiton) in adversary environment modulated by microstructural and functional attributes
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作者 Ummar IQBAL Mansoor HAMEED +2 位作者 Farooq AHMAD Muhammad S AAHMAD Muhammad ASHRAF 《Journal of Arid Land》 SCIE CSCD 2023年第5期578-601,共24页
Calotropis procera(Aiton)W.T.Aiton,belonging to the family Apocynaceae,is C3 evergreen plant species in arid and semi-arid areas of the Punjab Province,Pakistan.It grows in a variety of habitats like salt affected and... Calotropis procera(Aiton)W.T.Aiton,belonging to the family Apocynaceae,is C3 evergreen plant species in arid and semi-arid areas of the Punjab Province,Pakistan.It grows in a variety of habitats like salt affected and waterlogged area,desert/semi-desert,roadside,wasteland,graveyard,forest,crop field,coastline,and river/canal bank.A total of 12 populations growing in different ecological regions were sampled to evaluate their growth,physio-biochemical,and anatomical responses to specific environmental condition.Population adapted to desert/semi-desert showed vigorous growth(plant height,shoot length,and number of leaves),enhanced photosynthetic level(chlorophyll a,chlorophyll b,carotenoids,and total chlorophyll),and apparent anatomical modifications such as increased stem radius,cuticle thickness,storage parenchyma tissues(cortex and pith),and vascular bundles in stems,while the maximum of midrib and lamina thickness,epidermal cells,cuticle thickness,cortical proportion,abaxial stomatal density,and its area in leaves.There was high plasticity in structural and functional features of these populations,which enable them to survive and tolerate under such hot and dry desert environment.Population of saline areas exhibited very critical modifications to sustain under salt prone environment.At physiological level,it possesses the maximum amount of organic osmolytes(glycine betaine and proline)and antioxidants(superoxide dismutase(SOD),catalase(CAT),and peroxidase(POD)),while at anatomical level,it showed intensive sclerification,large phloem region(inner and outer),pith parenchyma cells,and metaxylem vessels in stems and leaves.The population of dry mountains showed very distinctive features,such as increased shoot ionic contents(K+and Ca2+),collenchyma and sclerenchyma thickness in stems,trichomes size,and numerous small stomata on abaxial surface of leaves.It is concluded that no definite or precise single character can be taken as a yardstick for adjudging the biomass production in this rubber bush weed population. 展开更多
关键词 calotropis procera APOCYNACEAE phenotypic plasticity ARIDITY rubber bush
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Anti-Fibrotic Effects of Calotropis procera (Ait.) R.Br Roots Barks against Diethylnitrosamine-Induced Hepatic Fibrosis in Rats
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作者 Ernest Nogma Sombié Tata Kadiatou Traoré +5 位作者 Abdoul-Nassiré Derra Jotham Yhi-Pênê N’do Wendkouni L. M. E. Belem-Kabré Noufou Ouédraogo Adama Hilou André Tibiri 《Journal of Biosciences and Medicines》 2023年第4期332-349,共18页
Background: Liver diseases including chronic hepatitis, steatosis, fibrosis, cirrhosis and liver cancer are now a public health problem. In 2002, cirrhosis accounted for 27.63% of hepatobiliary diseases in Burkina Fas... Background: Liver diseases including chronic hepatitis, steatosis, fibrosis, cirrhosis and liver cancer are now a public health problem. In 2002, cirrhosis accounted for 27.63% of hepatobiliary diseases in Burkina Faso. In Africa and more particularly in Burkina Faso, the majority of the population (about 80%) uses medicinal plants for their primary health care. Calotropis procera (Ait.) R.Br (Apocynaceae) is a medicinal plant used in Burkina Faso in the treatment of liver problems. This work aims to evaluate the anti-fibrotic properties of Calotropis procera roots barks. Methods: The anti-fibrotic activity of the ethanolic extract of Calotropis procera roots barks was evaluated using diethylnitrosamine (DEN) to induce liver fibrosis in male Wistar rats. Serum biomarkers, alanine transaminase (ALT), aspartate transaminase (AST), alkaline phosphatase (ALP), Total protein, Albumin, Υ-Glutamyl transferase (GGT) were evaluated and the activities of antioxidant enzymes (Superoxide dismutase and catalase) as well as the level of malonedialdehyde (MDA) and that of nitric oxide (NO) were determined in the liver homogenate. Results: The treatment of rats suffering from hepatic fibrosis with the ethanolic extract leads to a significant restoration of the biomarkers of the hepatic function in particular, AST, ALP, GGT, Albumin. The extract also causes a reduction in oxidative stress in the liver through a significant increase in the activity rate of the antioxidant enzymes Superoxide dismutase (SOD) and catalase accompanied by a significant drop in the rate of MDA and NO suggesting the anti-oxidant effect of extract. Conclusion: The results of the study show that the ethanolic extract of the roots barks of Calotropis procera has anti-fibrotic properties. 展开更多
关键词 Hepatic Fibrosis calotropis procera Anti-Fibrotic Properties Burkina Faso
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Anticancer and cytotoxic properties of the latex of Calotropis procera in a transgenic mouse model of hepatocellular carcinoma 被引量:3
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作者 Tenzin Choedon Ganeshan Mathan +2 位作者 Soneera Arya Vijay L Kumar Vijay Kumar 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第16期2517-2522,共6页
AIM: To evaluate the anticancer property of the dried latex (DL) of Calotropis procera, a tropical medicinal plant, in the X15-myc transgenic mouse model of hepatocellular carcinoma and to elucidate its mechanism o... AIM: To evaluate the anticancer property of the dried latex (DL) of Calotropis procera, a tropical medicinal plant, in the X15-myc transgenic mouse model of hepatocellular carcinoma and to elucidate its mechanism of action in cell culture. METHODS: The young transgenic mice were orally fed with the aqueous suspension of DL (400 mg/kg for 5 d/wk) for 15 wk and their liver was examined for histopathological changes at 20 wk. Serum levels of vascu- lar endothelial growth factor (VEGF) were also measured in these animals. To characterize the active fraction, DL was extracted with petroleum ether followed by methanol. The methanolic extract was sub-fractionated on a silica gel G column using a combination of non-polar and polar solvents and eleven fractions were obtained. Each fraction was analysed for cytotoxic effect on hepatoma (Huh7) and non-hepatoma (COS-1) cell lines and nontransformed hepatocytes (AML12) using tetrazolium (MTT) assay. Finally, the mechanism of cell death was investigated by measuring the levels of Bcl2, caspase 3 and DNA fragmentation. RESULTS: DL treatment of mice showed a complete protection against hepatocarcinogenesis. No adverse effect was observed in these animals. The serum VEGF level was significantly lowered in the treated mice as compared to control animals. Cell culture studies revealed that the methanolic extract of DL as well as its fraction 8 induced extensive cell death in both Huh-7 and COS-1 cells while AML12 cells were spared. This was accompanied by extensive fragmentation of DNA in Huh-7 and COS-1 cells. No change in the levels of canonical markers of apoptosis such as Bcl2 and caspase 3 was observed. CONCLUSION: DL of C. procera has the potential for anti-cancer therapy due to its differentJable targets and non-interference with regular pathway of apoptosis. 展开更多
关键词 calotropis procera Transgenic mice Hepatocellular carcinoma CYTOTOXICITY Anticancer agent Differential killing
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Evaluation of antitumour activity of Calotropis gigantea L.root bark against Ehrlich ascites carcinoma in Swiss albino mice 被引量:2
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作者 M Rowshahul Habib M Rezaul karim 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2011年第10期786-790,共5页
Objective:To investigate experimentally the possible antitumor effect of methanol extract(ME) of Calotropis gigantea L.(C.gigantean) root bark and its petroleum ether(PEF) and chloroform(CF) soluble fractions against ... Objective:To investigate experimentally the possible antitumor effect of methanol extract(ME) of Calotropis gigantea L.(C.gigantean) root bark and its petroleum ether(PEF) and chloroform(CF) soluble fractions against Ehrlich ascites carcinoma(EAC) in Swiss albino mice.Methods:The effects of ME(10 and 20 mg/kg),PEF(40 and 80 mg/kg) and CF(20 and 40 mg/kg) on the growth of EAC and life span of EAC bearing mice were studied.Hematological profile and biochemical parameters(SAI.P,SGPT and SCOT) were also estimated.Results:Results of in vivo study showed a significant decrease in viable tumor cell count and a significant increase of life span in the ME and CF treated group compared to untreated one.The life span of ME and CF treated animals was significandy(P【0.05) increased by 43.90%(20 mg ME/kg) and 57.07%(40 mg CF/kg).ME and CF brought back the hematological parameter more or less normal level.ME and CF also restored the altered levels of serum alkaline phosphatase(SALP) and serum glutamate oxaloacetate transaminase(SGOT).Conclusions:Methanol extract(ME) of C.gigantea root bark and its chloroform soluble fraction(CF) possesses significant antitumor activity. 展开更多
关键词 calotropis gigantea ANTITUMOR Ehrlich ASCITES CARCINOMA ROOT BARK
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Therapeutic and biological activities of Calotropis procera(Ait.) R.Br. 被引量:2
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作者 Marcia Calheiros Chaves Silva Antonio Batista da Silva +7 位作者 Fabiano Moura Teixeira Paulo Cesar Pereira de Sousa Regina Maria Macedo Rondon Jose Eduardo Ribeiro Honorio Junior Luiz Rafael Leite Sampaio Samanda Lima Oliveira Angela Nadyla Martins Holonda Silvania Maria Mendes de Vasconcelos 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2010年第4期332-336,共5页
Medicinal plants have been used to treat various ailments of the poor population around the world;hence the interest among researchers to know the active ingredients of certain plants has being increased.The Calotropi... Medicinal plants have been used to treat various ailments of the poor population around the world;hence the interest among researchers to know the active ingredients of certain plants has being increased.The Calotropis procera(C.procera) is a plant original from Africa,commonly found in northeastern Brazil.It is well known for their pharmacological properties,since it produces large amounts of latex.The important role that medicinal plants play in folk medicine has led us to develop this article in order to review the major pharmacological activities of C. procera. 展开更多
关键词 calotropis procera PHARMACOLOGICAL activity MEDICINAL PLANTS
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Acaricidal activity of synthesized titanium dioxide nanoparticles using Calotropis gigantea against Rhipicephalus microplus and Haemaphysalis bispinosa 被引量:2
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作者 Sampath Marimuthu Abdul Abdul Rahuman +10 位作者 Chidambaram Jayaseelan Arivarasan Vishnu Kirthi Thirunavukkarasu Santhoshkumar Kanayairam Velayutham Asokan Bagavan Chinnaperumal Kamaraj Gandhi Elango Moorthy Iyappan Chinnadurai Siva Loganathan Karthik Kokati Venkata Bhaskara Rao 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2013年第9期682-688,共7页
Objective:To assess the acaricidal activity of titanium dioxide nanoparticles(TiO_2 NPs)synthesized from flower aqueous extract of Calotropis gigantea(C.gigantea)against the larvae of Rhipicephalus(Boophilus)microplus... Objective:To assess the acaricidal activity of titanium dioxide nanoparticles(TiO_2 NPs)synthesized from flower aqueous extract of Calotropis gigantea(C.gigantea)against the larvae of Rhipicephalus(Boophilus)microplus[R.(B.)microplus]and the adult of Haemaphrysalis bispinosa(H.bispinosa).Methods:The lyophilized C.gigantea flower aqueous extract of 50 mg was added with 100 mL of TiO(OH_2)(10 mM)and magnetically stirred for 6 h.Synthesized TiO_2 NPs were characterized by X-ray diffraction(XRD).Fourier transform infrared spectroscopy(FTIR),Scanning electron microscopy(SEM),and Energy dispersive X-ray spectroscopy(EDX).The synthesised TiO_2 NPs were tested against the larvae of R(B.)microplus and adult of H.bispinosa were exposed to filter paper impregnated method.Results:XRD confirmed the crystalline nature of the nanoparticles with the mean size of 10.52 nm.The functional groups for synthesized TiO_2NPs were 1405.19,and 1053.45 cm^(-1)for-NH_2 bending,primary amines and amides and 1053.84and 1078.45 cm^(-1)for C-O.SEM micrographs of the synthesized TiO_2 NPs showed the aggregated and spherical in shape.The maximum efficacy was observed in the aqueous flower extract of C.gigantea and synthesized TiO_2 NPs against R.(B.)microplus(LC_(50)=24.63 and 5.43 mg/L and r^2=0.960 and 0.988)and against H.bispinosa(LC_(50)=35.22 and 9.15 mg/L and r^2=0.969 and 0.969).respectively.Conclusions:The synthesized TiO_2 NPs were highly stable and had significant acaricidal activity against the larvae of R.(B.)microplus and adult of H.bispinosa.This study provides the first report of synthesized TiO_2 NPs and possessed excellent anti-parasitic activity. 展开更多
关键词 Rhipicephalus(Boophilus) microplus Haemaphysalis bispinosa calotropis gigantean TITANIUM dioxide nanoparticles X-ray DIFFRACTION techniques Electron MICROSCOPIC study
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Antimicrobial activity of latex silver nanoparticles using Calotropis procera 被引量:1
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作者 Nadia Hussein Mohamed Mady Ahmed Ismail +1 位作者 Wael Moustfa Abdel-Mageed Ahmed Abdelfattah Mohamed Shoreit 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2014年第11期876-883,共8页
Objective:To synthesize silver nanoparticles(AgNPs) by green methods using scrum latex of Calotropis procera at 80 ℃ and evaluate them against bacteria,dermatophytes and phytopathogenic fungi comparing with the activ... Objective:To synthesize silver nanoparticles(AgNPs) by green methods using scrum latex of Calotropis procera at 80 ℃ and evaluate them against bacteria,dermatophytes and phytopathogenic fungi comparing with the activity of untreated latex.Methods:The synthesis of AgNPs was performed by mixing 3%latex scrum extract with the same volume of silver nitrate(2 mmol/L) solution in round flask and heating in water bath at80 ℃.Characterization of silver particles were determined using UV-vis spectrophotometer,transmission electron microscopy(TEM),X-ray diffraction and Fourier transform infrared spectroscopy.The antimicrobial activity of the green synthesized AgNPs was determined against bacteria,dermatophytes and phytopathogenic fungi and compared to the crude untreated latex by agar-well diffusion methods.Results:Biosynthesis of latex silver nanoparticles was successfully obtained by green method.The formation of AgNPs has been confirmed by UV-vis,TEM microscopy.X-ray diffraction and Fourier transform infrared spectroscopy.TEM analysis showed that synthesized AgNPs are highly stable spherical shaped particles,well dispersed with a diameter ranged from 4 nm up to 25 nm and an average size of 12.33 nm.AgNPs showed strong antibacterial activity against Gram-negative bacteria(Escherichia coli,Pseudomonas aeruginosa and Serratia sp.) and antifungal activity against Trichophyton rubrum,Candida albicans and Aspergillus terreus.Conclusions:It can be concluded that serum latex of Calotropis pmcera was found to display strong potential for the synthesis of AgNPs as antimicrobial agents through rapid reduction of silver ions(Ag^+ to Ag^0).The green synthesized AgNPs were found to show higher antimicrobial efficacy than crude latex. 展开更多
关键词 Green synthesis calotropis procera LATEX SILVER NANOPARTICLES ANTIMICROBIAL ACTIVITY
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Saponins-rich fraction of Calotropis procera leaves elicit no antitrypanosomal activityin a rat model
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作者 Mohammed Auwal Ibrahim Abubakar Babando Aliyu +1 位作者 Kayode Meduteni Isa Yunusa 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2013年第7期569-572,共4页
Objective:To examine thein vitroandin vivoanti-Trypanosoma evansi(T.evansi)activity ofsaponins-rich fraction ofCalotropis procera(cpsf)leaves as well as the effect of the fraction onthe parasite-induced anemia.Methods... Objective:To examine thein vitroandin vivoanti-Trypanosoma evansi(T.evansi)activity ofsaponins-rich fraction ofCalotropis procera(cpsf)leaves as well as the effect of the fraction onthe parasite-induced anemia.Methods:A 60-minutes time course experiment was conductedwith various concentrations of the fraction using a 96-well microtiter plate technique,andsubsequently used to treat experimentallyT.evansiinfected rats at 100 and 200 mg/kg bodyweight.Index of anemia was analyzed in all animals during the experiment.Results:The cpsfdid not demonstrate anin vitroantitrypanosomal activity.Further,the cpsf treatments did notsignificantly(P>0.05)keep the parasites lower than the infected untreated groups.At the end ofthe experiment,allT.evansiinfected rats developed anemia whose severity was not significantly(P>0.05)ameliorated by the cpsf treatment.Conclusions:It was concluded that saponins derivedfromCalotropis proceraleaves could not elicitin vitroandin vivoactivities againstT.evansi. 展开更多
关键词 ANEMIA ASCLEPIADACEAE calotropis procera SAPONINS TRYPANOSOMA evansi
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Toxicological characterization and central nervous system effects of Calotropis procera Ait. aqueous extracts in mice
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作者 Prosper T.Kinda Samson Guenné +4 位作者 Moussa Compaoré Balé Bayala Alin Ciobica Raymond Belemtougri Martin Kiendrebéogo 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2019年第7期329-336,共8页
Objective: To evaluate the toxicological and psychotropic properties of Calotropis(C.) procera. Methods: C. procera leaves and root-bark aqueous extracts were evaluated for their toxic and behavioral effects using adu... Objective: To evaluate the toxicological and psychotropic properties of Calotropis(C.) procera. Methods: C. procera leaves and root-bark aqueous extracts were evaluated for their toxic and behavioral effects using adult mice. Toxicity studies were carried out using Organisation for Economic Cooperation and Development guidelines 423 and 407 for acute and subacute evaluation. Behavioral studies were performed using traction test, fireplace test, hole-board test and forced-swimming test to evaluate the sedative, anxiety and depressive-like activities of the extracts. Results: Very low acute toxicity was observed in mice that received both leaves and rootbark extracts. The subacute test showed some morphological, biochemical and hematological changes in the treated groups. Behavioral assessment demonstrated anxiety effects on mice for C. procera leaf extract(400 mg/kg of body weight). Conclusions: The acute use of C. procera(leaves and root-barks) aqueous extracts could be considered as low toxic. However, their repeated uses could have harmful effect on some organs. Likewise, a single dose up to 400 mg/kg body weight of these extracts produce no sedative or depressive-like effect, but they possess possible dose dependent anxiety effect. Yet, more studies are necessary to relate these results to the chemical profile of the plant extracts. 展开更多
关键词 calotropis procera TOXICITY BEHAVIORAL Burkina Faso
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Therapeutic potential of Calotropis gigantea extract against invasive pulmonary aspergillosis:In vitro and in vivo study
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作者 Enas M.Ali Manal A.Alfwuaires Gehan M.Badr 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2022年第6期243-252,共10页
Objective:To characterize the antifungal activity of methanolic leaf extract of Calotropis gigantea alone or in combination with amphotericin B against invasive pulmonary aspergillosis in mice.Methods:GC/MS was used f... Objective:To characterize the antifungal activity of methanolic leaf extract of Calotropis gigantea alone or in combination with amphotericin B against invasive pulmonary aspergillosis in mice.Methods:GC/MS was used for analysis of active constituents of Calotropis gigantea extract.Spore germination assay and broth micro-dilution method were used to determine antifungal potential of Calotropis gigantea/amphotericin B against Aspergillus fumigatus.Neutropenic mice were randomly assigned into 5 groups:group 1 was neutropenic(control);group 2 was infected with Aspergillus fumigatus;group 3 was infected with Aspergillus fumigatus,and treated with Calotropis gigantea extract;group 4 was infected with Aspergillus fumigatus and treated with amphotericin B;group 5 was infected with Aspergillus fumigatus and treated with both Calotropis gigantea extract and amphotericin B.Fresh lung tissues were histopathologically examined.Fungal burden and gliotoxin concentration were evaluated in lung tissues.Catalase,superoxide dismutase,and malondialdehyde content were determined in lung tissues.Myeloperoxidase,tumor necrosis factor-alpha,interleukin-1,and interleukin-17 were also estimated by the sandwich enzyme-linked immuno-sorbent assay.Results:Calotropis gigantea/amphotericin B had a minimum inhibitory concentration and minimum fungicidal concentration of 80 and 160μg/mL,respectively,for Aspergillus fumigatus.Additionally,Calotropis gigantea/amphotericin B significantly reduced lung fungal burden by 72.95%and inhibited production of gliotoxin in lung tissues from 6320 to 1350μg/g lung.Calotropis gigantea/amphotericin B reduced the oxidative stress of the lung via elevating the activity of antioxidant enzymes and decreasing the levels of lipid peroxidation.Myeloperoxidase activity and the production of pro-inflammatory cytokines were also significantly reduced.Scanning electron microscopy revealed deteriorations in the hyphae ultrastructure in Calotropis gigantea/amphotericin B treated Aspergillus fumigatus and leak of cellular components after damage of the cell wall.In vivo study revealed the suppression of lung tissue damage in mice of invasive pulmonary aspergillosis,which was improved with Calotropis gigantea/amphotericin B compared to the control group.Conclusions:Calotropis gigantea/amphotericin B is a promising treatment to reduce lung fungal burden and to improve the drugs’therapeutic effect against invasive pulmonary aspergillosis. 展开更多
关键词 Aspergillus fumigatus ANTIFUNGAL Invasive pulmonary aspergillosis calotropis gigantea Amphotericin B MICE
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Antiandrogenic activity ofCalotropis procera latex in rats
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作者 Abdelgader Binyamen Abdelgader Adil Salim Elsheikh 《Asian pacific Journal of Reproduction》 2018年第3期129-135,共7页
Objective:To determine the effects ofCalotropis proceralatex on pubertal traits of immature male Wistar rats.Methods: A total of 30 immature male Wistar rats aged 3 weeks old were grouped randomly into 5 groups: group... Objective:To determine the effects ofCalotropis proceralatex on pubertal traits of immature male Wistar rats.Methods: A total of 30 immature male Wistar rats aged 3 weeks old were grouped randomly into 5 groups: group A (control group) was offered distilled water as a placebo;group B was daily oral dosed with suspension ofCalotropis procera latex at a dose rate of 5 mg/kg body weight(BW), group C 10 mg/kg BW;group D 15 mg/kg BW and group E 20 mg/kg BW. The rats were weighed daily to adjust the dose and record the BW changes, and the treatment continued for 4 weeks;thereafter, rats were sacrificed. Serum samples (n=30) were collected from all rats and kept frozen until assayed for reproductive hormones. Furthermore, the testes and epididymae were weighed;epididymal sperms were counted;sperm motility & abnormality were estimated;and histopathological sections of the testes were prepared. Results: The results of this study showed that oral dosing of immature male rats with Calotropis proceralatex at doses rate 10 mg/kg BW significantly (P<0.05) reduced the growth rate, BW, testicular & epididymal weights, the level of most of reproductive hormones as well as the sperm traits examined;however, it significantly (P<0.05) augmented the abnormalities of spermatozoa and the seminiferous epithelium.Conclusions: Latex ofCalotropis procera contains substances that have anti-androgenic activities and/or endocrine disrupting effects. If these substances are purified and identified, they can be used as male contraceptives. 展开更多
关键词 Anti-androgenic ACTIVITY calotropis procera LATEX IMMATURE MALE RATS
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Study on the Biomass Measuration for the Artificial Forest of <i>Calotropis gigantea</i>(L.) <i>Dryand.</i>
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作者 Mingcan Luo Huimin Liu Xingchang Ge 《Open Journal of Forestry》 2015年第4期454-456,共3页
Based on artificial forest of Calotropis gigantea (L.) Dryand. area of 20.1 hm2, planted in the base of seed management station in Yuanjiang County, Yunnan Province, according to the average standard wooden method, th... Based on artificial forest of Calotropis gigantea (L.) Dryand. area of 20.1 hm2, planted in the base of seed management station in Yuanjiang County, Yunnan Province, according to the average standard wooden method, the stand biomass was calculated in this paper. Based on the survey data of representative sample trees, the single-tree biomass model was constructed. 展开更多
关键词 calotropis gigantea (L.) Dryand. Artificial FOREST Biamass MODEL
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Biosorptive Removal of Zinc from Aqueous Solution by Algerian <i>Calotropis procera</i>Roots
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作者 Bahia Meroufel Mohamed Amine Zenasni +1 位作者 André Merlin Béatrice George 《Journal of Environmental Protection》 2015年第7期735-743,共9页
Potentially toxic trace elements, such as zinc, with high levels in water are very serious problems in many places around the world, sometimes in relation to natural sources and in other cases to anthropogenic ones. A... Potentially toxic trace elements, such as zinc, with high levels in water are very serious problems in many places around the world, sometimes in relation to natural sources and in other cases to anthropogenic ones. Adsorption process is among the most effective techniques for removing of many heavy metal ions from different types of water. In this study, an attempt has been made to investigate the efficiency of Calotropis procera roots (CP) in removing of Zn(II) from aqueous solution by using batch mode technique. During the removal process, the effects of solution pH, Zn concentrations and contact time on adsorption efficiency by CP roots were studied. Experimental equilibrium data were analyzed by the Langmuir and Freundlich isotherm models. The results showed that the best fit was achieved with the Langmuir isotherm equation with maximum adsorption capacity of 9.69 mg/g. The biosorption of Zn(II) was a fast process and followed the pseudo-second-order kinetic. 展开更多
关键词 calotropis procera ZN(II) ADSORPTION Kinetics ADSORPTION Isotherms
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Liposoluble Constituents from the Flowers of Calotropis Gigantea and Their Antimicrobial Activity
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作者 Maoyuan WANG Jianrong WANG +2 位作者 Xinrui ZHANG Xiaoxia YAN Zhunian WANG 《Medicinal Plant》 2017年第5期1-3,共3页
[Objectives] To study the liposoluble constituents and their antimicrobial activity from the flowers of Calotropis gigantea.[Methods]The liposoluble constituents from the flowers of Calotropis gigantea were analyzed b... [Objectives] To study the liposoluble constituents and their antimicrobial activity from the flowers of Calotropis gigantea.[Methods]The liposoluble constituents from the flowers of Calotropis gigantea were analyzed by gas chromatography-mass spectrometry(GCMS) method and their relative content was determined by area normalization method; and their antimicrobial activity against 2 pathogens was tested by agar disc diffusion method. [Results]31 compounds were separated and identified,amounting to 85. 14% of the total constituents,27 compounds were reported for the first time in the study of the liposoluble constituents from Calotropis gigantea. The results indicated that the liposoluble constituents from the flowers of Calotropis gigantea exhibited weak antimicrobial activity against Staphylococcus aureus and Canidia albicans. [Conclusions] The research results provided scientific foundation for exploitation and utilization of Calotropis gigantea. 展开更多
关键词 calotropis gigantea FLOWERS Liposoluble constituents ANTIMICROBIAL ACTIVITY GC-MS
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GC-MS Analysis of Liposoluble Constituents from Calotropis gigantea Roots
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作者 Maoyuan WANG Qing Yang +3 位作者 Qinglong Wang Xiaoxia YAN Jianrong WANG Zhunian WANG 《Medicinal Plant》 2017年第6期10-12,共3页
[Objectives] To effectively develop Calotropis gigantea resources and find the biological active constituents with medicinal value.[Methods]The liposoluble constituents from C. gigantea roots were studied by GC-MS for... [Objectives] To effectively develop Calotropis gigantea resources and find the biological active constituents with medicinal value.[Methods]The liposoluble constituents from C. gigantea roots were studied by GC-MS for the first time. [Results] 62 constituents were separated and identified from C. gigantea roots,amounting to 60. 43% of the total constituents,α-amyrin( 4. 18%),ethyl palmitate( 3. 49%),1,7-dimethyl-naphthalene( 3. 06%) were the main liposoluble constituents. [Conclusions] Cardiac glycoside was mainly found in methanol extracts and not detected in liposoluble constituents by extraction of petroleum ether. However,the present study found another component of low toxicity—naphthalene and its derivatives. 展开更多
关键词 calotropis gigantea Liposoluble constituents GC-MS
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Calotropis gigantea Fiber‑Based Sensitivity‑Tunable Strain Sensors with Insensitive Response to Wearable Microclimate Changes 被引量:5
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作者 Junze Zhang Jing Liu +8 位作者 Zeyu Zhao Weiwei Sun Gaojuan Zhao Jingge Liu Jianchu Xu Yuling Li Zekun Liu Yi Li Gang Li 《Advanced Fiber Materials》 SCIE EI CAS 2023年第4期1378-1391,共14页
Wearable tensile strain sensors have attracted substantial research interest due to their great potential in applications for the real-time detection of human motion and health through the construction of body-sensing... Wearable tensile strain sensors have attracted substantial research interest due to their great potential in applications for the real-time detection of human motion and health through the construction of body-sensing networks.Conventional devices,however,are constantly demonstrated in non-real world scenarios,where changes in body temperature and humidity are ignored,which results in questionable sensing accuracy and reliability in practical applications.In this work,a fabric-like strain sensor is developed by fabricating graphene-modified Calotropis gigantea yarn and elastic yarn(i.e.Spandex)into an independently crossed structure,enabling the sensor with tunable sensitivity by directly altering the sensor width.The sensor possesses excellent breathability,allowing water vapor generated by body skin to be discharged into the environment(the water evaporation rate is approximately 2.03 kg m^(-2) h^(-1))and creating a pleasing microenvironment between the sensor and the skin by avoiding the hindering of perspiration release.More importantly,the sensor is shown to have a sensing stability towards changes in temperature and humidity,implementing sensing reliability against complex and changeable wearable microclimate.By wearing the sensor at various locations of the human body,a full-range body area sensing network for monitoring various body movements and vital signs,such as speaking,coughing,breathing and walking,is successfully dem-onstrated.It provides a new route for achieving wearing-comfortable,high-performance and sensing-reliable strain sensors. 展开更多
关键词 Wearable strain sensor Functionalized calotropis gigantea fiber Wearable microclimate Graphene coating Tunable sensitivity
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Ag-Co3O4:Synthesis,characterization and evaluation of its photo-catalytic activity towards degradation of rhodamine B dye in aqueous medium 被引量:1
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作者 Muhammad Saeed Majid Muneer +3 位作者 Nida Mumtaz Mohsin Siddique Nadia Akram Muhammad Hamayun 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第6期1264-1269,共6页
Synthesis,characterization of Co_3O_4 and Ag-Co_3O_4 composites and evaluation of their photo-catalytic activities towards photo-degradation of aqueous solution of rhodamine B dye under irradiation of visible light ha... Synthesis,characterization of Co_3O_4 and Ag-Co_3O_4 composites and evaluation of their photo-catalytic activities towards photo-degradation of aqueous solution of rhodamine B dye under irradiation of visible light have been described in this paper.Co_3O_4 was prepared by solid phase mechano chemical process using Co(NO_3)_2·6H_2O and NH_4 HCO_3 as precursor materials.Ag was deposited on Co_3O_4 from AgNO_3 using Calotropis gigantea extract as reducing agent.XRD,SEM and FTIR were used for characterization of prepared composites.Photo-catalytic efficiencies of as-prepared Co_3O_4 and Ag-Co_3O_4 were evaluated for aqueous phase photo-degradation of rhodamine B.It was found that deposition of Ag on Co_3O_4 highly enhanced the photo-catalytic activity of Co_3O_4.Photo-catalytic degradation followed the Eley–Rideal mechanism.About 100% and 91% photo-degradation of 40 ml dye solution achieved at 313 K in 90 and 120 min over 0.05 g of Ag-Co_3O_4 as photo-catalyst using 100 and 200 mg·L^(-1) as initial concentration of dye respectively. 展开更多
关键词 CO3O4 Ag-Co3O4 PHOTO-CATALYSIS PHOTO-DEGRADATION calotropis gigantea Rhodamine B Elay–Rideal mechanism
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Blending Ratio Analysis of Akund / Cotton Blended Yarn Based on Micro Projection 被引量:1
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作者 蒋晓 王芹 +3 位作者 俞建勇 程隆棣 STOJANOVSKA Elena 范雯红 《Journal of Donghua University(English Edition)》 EI CAS 2012年第6期520-523,共4页
A microscope method was developed for testing the blending ratio of akund/cotton blended yarns. Fiber characteristics such as diameter, longitudinal feature, and hollow structure were observed to identify akund and co... A microscope method was developed for testing the blending ratio of akund/cotton blended yarns. Fiber characteristics such as diameter, longitudinal feature, and hollow structure were observed to identify akund and cotton. Therefore, the measurement of the blending ratio for akund/cotton blended yarns based on each fiber's amount, moisture regain, and metric count was available. The results show that using specimen's longitudinal section is more effective during the fiber counting than specimen's transverse section benefiting from the separation of the fibers. 展开更多
关键词 calotropis gigantea akund fiber blending ratio micro projection FEASIBILITY
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Antimicrobial Activity of Fruit Latexes from Ten Laticiferous Plants
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作者 Ravi Kant Upadhyay 《American Journal of Plant Sciences》 2015年第3期483-499,共17页
In the present investigation antibacterial activity of latexes from ten Indian plant species Spondias dulcis (Amra), Diospyros melanoxylon (Tendu), Terminalia bellirica (Wahera), Ficus glomerata (Gular), Phyllanthus e... In the present investigation antibacterial activity of latexes from ten Indian plant species Spondias dulcis (Amra), Diospyros melanoxylon (Tendu), Terminalia bellirica (Wahera), Ficus glomerata (Gular), Phyllanthus emblica (Awla), Thevetia nerifolia (Kaner), Carica papaya (Papita), Calotropis procera (Ak), Ficus benghalensis (Bargad), Atrocarpus heterophyllus (Kathal) collected from Go-rakhpur, North India were determined in various in vitro systems. MIC (minimum inhibitory concentration) and MBC (minimum bactericidal concentration) values were determined in growth inhibitory bioassays by using different increasing concentrations of various latex extracts. Latex samples were diluted by using serial micro dilution method up to 10-10 method with Luria broth culture medium. These values were obtained significantly 2 - 3 times lower than that of broad spectrum antibiotic drugs. Besides this, inhibition zone diameters were measured in agar disc diffusion assay. A known volume i.e. 0.1 - 20 μg/μl of each latex were coated on separate sterile filter paper discs (Whatman No. 1) measuring 6 mm in size. Latex fractions registered significantly higher growth inhibition than that of broad spectrum antimicrobial drugs. Present study indicates the potential use of shows that both latex and its components and latex as are valuable source of medicinal products/active principles that can be used for treatment of life threatening infectious diseases. Because of higher inhibitory and cidal potential obtained in latexes than the synthetic drugs these that could lead to become efficient phytomedicines mainly to have and develop as complete drug formulations against to control infectious microbes. 展开更多
关键词 Plant LATEX CARICA PAPAYA calotropis procera FICUS benghalensis Atrocarpus heterophyllus Growth Inhibition ANTIMICROBIAL Susceptibility
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Effects of plant latex based anti-termite formulations on Indian white termite <i>Odontotermes obesus</i>(Isoptera: Odontotermitidae) in sub-tropical high infestation areas
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作者 Ravi Kant Upadhyay 《Open Journal of Animal Sciences》 2013年第4期281-294,共14页
In the present investigation various bioassays were conducted to evaluate the anti-termite efficacy of plant latex based formulations to control population of Indian white termite in subtropical soil. Results reveal t... In the present investigation various bioassays were conducted to evaluate the anti-termite efficacy of plant latex based formulations to control population of Indian white termite in subtropical soil. Results reveal that crude latex, its fractions and combinatorial fractions have shown very high toxicity against O. obesus. The LD50 values for different latex fractions of 24 h were in a range of 5.0-17.613 μg/mg while combined mixtures of Calotropis procera have shown synergistic activity against termites and caused comparably high mortality with LD50 1.987-6.016 μg/mg. The mortality rate was found dose and time dependent as it was found to be increased with an increase in dose and exposure period. In olfactometry tests, C. procera latex solvent fractions have shown significant repellency at a very low dose 0.010-0.320 μg/mg. Interestingly, solvent fractions have significantly repelled large numbers of worker termites due to volatile action of active components of latex and different additives. ED50 values obtained in crude latex were 0.121 μg/mg body weights while combinatorial formulations have shown ED50 in between 0.015-0.036 μg/mg. Statistical analysis of repelled and un-repelled termites gave a low Chi-square value (X2 value = 0.890) which is an indicator of independence of repellent action in randomly selected termite groups. In field experiments pre-soaked cotton threads impregnated with Calotropis procera crude latex were tagged around tree trunks of Tectona grandis provided a wider protection against O. obesus. By employing these pre-coated threads, termite infestation and tunneling activity were significantly decreased (p Calotropis procera possesses enough anti-termite potential against Indian white termite, O. obesus population. If used these, formulations may also provide wide a range of control against other kinds of pests including house hold, medical and veterinary. However, Calotropis procera latex based formulations can be recommended for effective control of termites in high infestation areas by applying spray, or in form of poison baits or as fumigant in pure form. 展开更多
关键词 calotropis procera Odontotermes obesus PLANT LATEX Toxic EFFECTS
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