Objective:To elucidate its pharmacological activities and medicinal potential of extract of Etlingera elatior（E.elatior）.Methods:Phytochemical screening of the flower extract was done to determine the phytochemical ...Objective:To elucidate its pharmacological activities and medicinal potential of extract of Etlingera elatior（E.elatior）.Methods:Phytochemical screening of the flower extract was done to determine the phytochemical in the extract.The pharmacological study included the determination of antimicrobial activity and minimum inhibitory concentration（MIC） of metabolic flower extract.The antimicrobial activity of the extract was tested against medically important bacterial,yeast and fungal strains.Apart from that,the methanolic extract of E.elatior flower was further tested in vivo toxicity using the brine shrimp lethality test.Moreover,the flower extract was qualitatively screened for their free radical scavenging activity by 2,2-diphenyl-1- picrylhydrazyl radical（DPPH） assay.Results:The extract was effective on tested microorganisms and MIC values were in the range of 1.563-50.000 mg/mL.The brine shrimp lethality test exhibited no significant toxicity(LC<sub>50</sub>= 2.52 mg/mL) against Artemia salina.The E.elatior flower extract with high LC<sub>50</sub> value signified that this plant is not toxic to humans.While the phytochemical screening of the flower extract revealed the presence of the following compounds: flavonoids,terpenoids,saponin,tannins and carbohydrates whereas,alkaloids,anthraquinone and reducing sugars were absent.The concentration of the flower extract required for 50% inhibition of DPPH radical scavenging effect(IC<sub>50</sub>) were 9.14 mg/mL and 8.08 mg/mL for butylated hydroxytoluene 8.08 mg/mL.Conclusions:These findings indicate that the extract of E.elatior flower possesses pharmacological properties and potential to develop natural products based pharmaceuticals products.展开更多
Two new compounds, namely taenialactam C and globorin A（1 and 2）, as well as six known compounds,cornoside（3）, 2-phenylethyl-b-D-glucoside（4）, 3-isopropyl-5-acetoxycyclohexene-2-one-1（5）, 4-methyl-phenol（6）,...Two new compounds, namely taenialactam C and globorin A（1 and 2）, as well as six known compounds,cornoside（3）, 2-phenylethyl-b-D-glucoside（4）, 3-isopropyl-5-acetoxycyclohexene-2-one-1（5）, 4-methyl-phenol（6）, 5-[（2S）-2-aminobutyl]-2-methyl-phenol（7）, and 1-（4-methylphenyl）-1-propanone（8） were isolated from wild Phaeocystis globosa. The structures of the new compounds were established by detailed spectroscopic analysis and by comparison with spectral data of related known compounds.The structures of the known compounds were identified by comparing their spectroscopic data with those reported in the literature. This paper also reports toxicity properties of the eight compounds against the brine shrimp Artemia salina and juvenile Epinephelus akaara fish. Some of these compounds showed significant lethality on the brine shrimp A. salina and the juvenile E. akaara fish.展开更多
Objective:To investigate the toxicity of methanol extract of various parts(Root,Stem,Leaf, Flower and Fruit) of Lantana camara(L.Camara) in Artemia salina.Methods:The methanol extracts of L.camara were tested for in v...Objective:To investigate the toxicity of methanol extract of various parts(Root,Stem,Leaf, Flower and Fruit) of Lantana camara(L.Camara) in Artemia salina.Methods:The methanol extracts of L.camara were tested for in vivo brine shrimp lethality assay.Results:All the tested extract exhibited very low toxicity on brine shrimp larva.The results showed that the root extract was the most toxic part of L.camara and may have potential as anticancer agent.Conclusions: Methanolic extract of L.camara is relatively safe on short-term exposure.展开更多
This study investigated the effect of different ozone concentration on the hatching rate of Artemia salina cysts and the survival rate of hatched nauplii. In the same time we have done some researches on the disinfect...This study investigated the effect of different ozone concentration on the hatching rate of Artemia salina cysts and the survival rate of hatched nauplii. In the same time we have done some researches on the disinfect effect of ozone . The result indicates that low ozone concentration can increase the hatching rate of Artemia salina cysts, the concentration about 0.87mg/L is the best level for hatching,and the safe concentration to hatch Artemia salina nauplius is under 0.60 mg/L. According to the curve of ozone declining in seawater, we suggest that using the concentration 0.8～0.9 mg/L to treat the incubation water should increase the rates of hatch Artemia salina cysts and be safe to Artemia salina nauplii.展开更多
基金supported by Universiti Sains Malaysia fellowship from Institute for Postgraduate Studies,Universiti Sains Malaysia
文摘Objective:To elucidate its pharmacological activities and medicinal potential of extract of Etlingera elatior（E.elatior）.Methods:Phytochemical screening of the flower extract was done to determine the phytochemical in the extract.The pharmacological study included the determination of antimicrobial activity and minimum inhibitory concentration（MIC） of metabolic flower extract.The antimicrobial activity of the extract was tested against medically important bacterial,yeast and fungal strains.Apart from that,the methanolic extract of E.elatior flower was further tested in vivo toxicity using the brine shrimp lethality test.Moreover,the flower extract was qualitatively screened for their free radical scavenging activity by 2,2-diphenyl-1- picrylhydrazyl radical（DPPH） assay.Results:The extract was effective on tested microorganisms and MIC values were in the range of 1.563-50.000 mg/mL.The brine shrimp lethality test exhibited no significant toxicity(LC<sub>50</sub>= 2.52 mg/mL) against Artemia salina.The E.elatior flower extract with high LC<sub>50</sub> value signified that this plant is not toxic to humans.While the phytochemical screening of the flower extract revealed the presence of the following compounds: flavonoids,terpenoids,saponin,tannins and carbohydrates whereas,alkaloids,anthraquinone and reducing sugars were absent.The concentration of the flower extract required for 50% inhibition of DPPH radical scavenging effect(IC<sub>50</sub>) were 9.14 mg/mL and 8.08 mg/mL for butylated hydroxytoluene 8.08 mg/mL.Conclusions:These findings indicate that the extract of E.elatior flower possesses pharmacological properties and potential to develop natural products based pharmaceuticals products.
基金supported by grants from National Natural Science Foundation of China (No. 31100260, 81260480, and 41566004)National Natural Science Foundation of Guangxi (No. 2011GXNSFE018002)+1 种基金Guangxi Key Laboratory of Marine Environmental Science, Guangxi Academy of Sciences (No. GXKLHY13-06)Foundation of Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences (No. 201210ZS)
文摘Two new compounds, namely taenialactam C and globorin A（1 and 2）, as well as six known compounds,cornoside（3）, 2-phenylethyl-b-D-glucoside（4）, 3-isopropyl-5-acetoxycyclohexene-2-one-1（5）, 4-methyl-phenol（6）, 5-[（2S）-2-aminobutyl]-2-methyl-phenol（7）, and 1-（4-methylphenyl）-1-propanone（8） were isolated from wild Phaeocystis globosa. The structures of the new compounds were established by detailed spectroscopic analysis and by comparison with spectral data of related known compounds.The structures of the known compounds were identified by comparing their spectroscopic data with those reported in the literature. This paper also reports toxicity properties of the eight compounds against the brine shrimp Artemia salina and juvenile Epinephelus akaara fish. Some of these compounds showed significant lethality on the brine shrimp A. salina and the juvenile E. akaara fish.
基金Supported by a grant form Universiti Sains Malaysia University
文摘Objective:To investigate the toxicity of methanol extract of various parts(Root,Stem,Leaf, Flower and Fruit) of Lantana camara(L.Camara) in Artemia salina.Methods:The methanol extracts of L.camara were tested for in vivo brine shrimp lethality assay.Results:All the tested extract exhibited very low toxicity on brine shrimp larva.The results showed that the root extract was the most toxic part of L.camara and may have potential as anticancer agent.Conclusions: Methanolic extract of L.camara is relatively safe on short-term exposure.
文摘This study investigated the effect of different ozone concentration on the hatching rate of Artemia salina cysts and the survival rate of hatched nauplii. In the same time we have done some researches on the disinfect effect of ozone . The result indicates that low ozone concentration can increase the hatching rate of Artemia salina cysts, the concentration about 0.87mg/L is the best level for hatching,and the safe concentration to hatch Artemia salina nauplius is under 0.60 mg/L. According to the curve of ozone declining in seawater, we suggest that using the concentration 0.8～0.9 mg/L to treat the incubation water should increase the rates of hatch Artemia salina cysts and be safe to Artemia salina nauplii.
