Antimicrobial activity of extractives of Sarcocephalus coadunatus

The methanolic extracts and the fractions (petrol, dichloromethane, ethyl acetate, butanol) obtained from the leaves, seeds, stem and root barks of Sarcocephalus coadunatus exhibited a high level of broad spectrum antibacterial activity. The activity was more pronounced in the dichloromethane, ethyl acetate and butanol fractions of the leaves; ethyl acetate and butanol fractions of the seeds; dichloromethane fractions of the stem bark and the ethyl acetate fractions of the root bark. None of the fractions showed any antifungal activity.     

Antimicrobial activity of the Derris elliptica, Derris indica and Derris trifoliata extractives

Various parts of Derris elliptica, Derris indica and Derris trifoliata on fractionation with a number of solvents (petrol, dichloromethane, ethyl acetate, butanol and methanol) gave fractions which demonstrated a varied level of broad spectrum antibacterial activity. Good activity was exhibited by the methanol fractions of the leaves and root heart-wood, petrol, butanol and methanol fractions of the root bark of D. indica and petrol and ethyl acetate fractions of D. trifoliata. None of the plants showed antifungal activity.     

Antioxidative and radical scavenging effects of olive cake extract

The antioxidative activity of different butanol extract fractions of olive cake was investigated. Four fractions showed marked antioxidative activity in comparison with BHT. Fractions tested also showed good hydrogen donating abilities, indicating that they had effective activities as radical scavengers. Coumaric, ferulic, cinnamic acids and oleuropein were isolated.     

山竹果皮提取物抗氧化活性研究

采用DPPH自由基清除能力、超氧自由基清除能力、β-胡萝卜素漂白抑制、还原力测定及抗脂质过氧化等试验方法对山竹果皮提取物及其二氯甲烷可溶部分、正丁醇可溶部分、水可溶部分进行抗氧化活性评估,同时对总酚含量进行测定。结果表明,山竹果皮提取物的各分离部位以正丁醇可溶部分的抗氧化活性最好,总酚含量也最高。因此,山竹果皮提取物正丁醇可溶部分具有极佳的抗氧化能力,有进一步开发应用的价值。     

Antibacterial and antifungal activities of Dracontomelon dao

The crude methanolic extracts of the leaves, stem and root barks of Drancantomelon dao and their subsequent partitioning (petrol, dichloromethane, ethyl acetate, butanol) gave fractions which demonstrated a very good level of broad spectrum antibacterial activity. The dichloromethane and butanol fractions of the leaf were the most active. Only the leaf fractions had antifungal activity, particularly the dichloromethane and butanol.     

Antioxidant activity of Erica arborea

The antioxidant properties of the methanol extract of leaves and flowers of Erica arborea and the ethyl acetate, butanol and water soluble fractions were investigated. The ethyl acetate extract was found to be the richest for phenolic and flavonoid content which showed the highest antioxidant activity.     

Antibacterial activity of Pterocarpus indicus

The leaves, root and stem barks of Pterocarpus indicus were successively partitioned with petrol, dichloromethane, ethyl acetate, butanol and methanol. All the fractions exhibited a wide spectrum of antibacterial activity. The activity was more pronounced in the butanol and methanol fractions. None were active against the moulds.     

Antimicrobial activity of the Maniltoa schefferi extracts

All fractions of Maniltoa schefferi exhibited a broad spectrum of antibacterial activity. Good activity was demonstrated by the petrol and dichloromethane fractions of seed pods, seeds with coat and by methanol fractions of stem heartwood, root bark, root heartwood and stem bark whose butanol fraction was equally good. None of the fractions showed any antifungal activity.     

Antibacterial activity of Picrasma javanica

The methanol extracts of Picrasma javanica, leaves, seeds, stem and root barks were partitioned (petrol, dichloromethane, ethyl acetate, butanol). All obtained extracts and fractions showed a broad spectrum of antibacterial activity, while none was active against the tested moulds.     

Antibacterial and antifungal activities of Breynia cernua

The Breynia cernua leaves, stem and root barks and heart-woods extracted with petrol, dichloromethane, ethyl acetate, butanol and methanol gave fractions with varied level of antimicrobial activity. The best activity was exhibited by the methanol extract of the root bark followed by its butanol fraction. These were the only fractions exhibiting a good level of antifungal activity as compared to the standard. The dichloromethane fraction of the stem bark also demonstrated good activity.     

Antihyperglycemic activity of Caralluma attenuata

Extracts of Caralluma attenuata are screened for their antihyperglycemic activity. Ethanol, chloroform and butanol extracts were tested on glucose loaded and alloxan-induced diabetic rats. In both tests, the butanol extract, at the oral dose of 250 mg/kg, has shown statistically significant and considerable antihyperglycemic activity.     

Antibacterial activity of Hygrophila stricta and Peperomia pellucida

The crude methanolic extracts of Hygrophila scricta and Peperomia pellucida were fractionated into petrol, dichloromethane, ethyl acetate and butanol. All the crude extracts and the fractions exhibited a very good level of broad spectrum antibacterial activity. The fractions were more active than the crude extracts. The petrol fraction of H. stricta and the butanol fraction of P. pellucida were particularly good. No activity was noticed for the moulds tested.     

Antiinflammatory and ulcerogenic activities of Salvia triloba extracts

In continuation of our research on Salvia triloba, acute and chronic antiinflammatory and ulcerogenic activities of chloroform, ethanol, butanol and water extracts were detected at 25 mg/kg p.o. The chloroform extract showed the highest antiinflammatory activity in both acute and chronic models, while the ulcerogenic effects of all tested extracts were found to be less than that of acetyl salicylic acid.     

Antibacterial activity of Alstonia scholaris and Leea tetramera

The crude methanolic extracts of the leaves, stem and root barks of Alstonia scholaris and Leea tetramera on partitioning (petrol, dichloromethane, ethyl acetate, butanol) gave fractions exhibiting improved and broader spectrum of antibacterial activity. Especially the butanol fractions of A. scholaris and the root bark of L. tetramera. None of the fractions were active against the fungi tested.     

Antibacterial activity of Artocarpus heterophyllus

The crude methanolic extracts of the stem and root barks, stem and root heart-wood, leaves, fruits and seeds of Artocarpus heterophyllus and their subsequent partitioning with petrol, dichloromethane, ethyl acetate and butanol gave fractions that exhibited a broad spectrum of antibacterial activity. The butanol fractions of the root bark and fruits were found to be the most active. None of the fractions were active against the fungi tested.     

Free radical scavenging activity of Achillea alexandri-regis extracts

The antioxidative potential of Achillea alexandri-regis has been studied by measuring the influence of herb extracts on hydroxyl and superoxide radicals' quantity in different in vitro systems. The ethyl acetate extract exhibited hydroxyl radical scavenging activity in all tested biological system (liver homogenate, hemolyzed blood, serum and postmitochondrial liver fraction), whereas butanol extract reduced hydroxyl radicals significantly only in the postmitochondrial liver fraction. Both extracts showed superoxide radical scavenging effect only in hemolyzed blood.     

Antibacterial,antifungal activity of Harpullia petiolaris

The methanol extracts of Harpullia petiolaris, leaves, stem and root barks and heartwoods were fractionated into petrol, dichloromethane, ethyl acetate and butanol. All fractions exhibited antibacterial activity.     

Antibacterial,antifungal activities of Barringtonia asiatica

The crude methanolic extract of Barringtonia asiatica (leaves, fruits, seeds, stem and root barks) and the fractions (petrol, dichloromethane, ethyl acetate, butanol) exhibited a very good level of broad spectrum antibacterial activity. A number of fractions demonstrated antifungal activity against a number of fungi.     

Antibacterial and antifungal activities of Angiopteris evecta

The leaves, stem bark, stem heart wood, root and tubers of Angiopteris evecta were successively extracted with petrol, dichloromethane, ethyl acetate, butanol and methanol. All the fractions exhibited a wider spectrum of antibacterial activity. The dichloromethane and ethyl acetate fractions of the leaves and stem bark were particularly good and were the only fractions exhibiting antifungal activity. All fractions of the tuber with the exception of petrol, exhibited very good antibacterial activity.     

Antibacterial activity of Galeola foliata

Galeola foliata leaves and stem bark were successively extracted with petrol, dichloromethane, ethyl acetate, butanol and methanol. A broad spectrum antibacterial activity (24 bacteria and protozoan) was exhibited by both parts. A very good level of activity was demonstrated by the CH2Cl2 and EtOAc fractions. None of the fractions were active against the moulds.