Aims: Khaya grandifoliola C.DC is a plant used locally in Nigeria ethno medicine for remedy of various disease conditions. However, there is little scientific evidence to support the therapeutic claims of the plant. Therefore, these investigations were conducted to determine the antimicrobial activity, antioxidant and cytotoxic potentials of the plant extracts. Methodology and results: In vitro antimicrobial activity of the leaf and stem bark extracts of K. grandifoliola against some human pathogens was done using agar diffusion method. The free radical scavenging activity and cytotoxic property of the plant materials were evaluated using 2, 2- diphenyl-1-pieryhydrazyl radical (DPPH) and brine shrimp lethality bioassay methods respectively. The yields of the plant material extracts ranged from 3.57±0.06 to 6.49±0.01% and 4.76±0.02 to 9.17±0.06% for the leaf and stem bark extracts respectively. The minimum inhibitory concentration (MIC) of KG-A and KG-E ranged from 2.5 to 200 mg/mL and recorded remarkable activity against the growth of Staphylococcus aureus, Escherichia coli, Salmonella typhi, Pseudomonas aeruginosa, Trichophyton rubrum and Aspergillus flavus. However, Strepcoccus pneumoniae, Staphylococcus epidermidis, Klebsiella pneumoniae, and T. rubrum were resistant to the KG-W. The plant extracts demonstrated high DPPH free radical scavenging activity when compared with ascorbic acid used as control in the assay and, also exhibited lethality against brine shrimp larvae with LC50 values ranging from: leaf extracts (0.67 to 1502 ppm) and stem bark extracts (0.91 to 1431 ppm). Conclusion, significance and impact of study: The results show that the KG-A and KG-E have great potentials as antimicrobial agent and may be used in the treatment of infectious diseases caused by the susceptible organisms.
Plants, Medicinal

Aims: Quantitative screening of phytochemical properties and antimicrobial activities were done on some plants of importance in human medicine as traditional herbs to treat fish diseases in Malaysia. Six extracts of Vitex trifolia, Aloe vera, Strobilanthes crispus, Clinacanthus nutans, Pereskia grandifolia and Peperomia pellucida were determined for phytochemical properties and their antibacterial activities against common freshwater pathogens i.e. Streptococcus agalactiae, Aeromonas hydrophila and Enterobacter cloacae. Methodology and results: Qualitative screening of phytochemical properties in herbs were determined using conversional method for flavonoids, tannins, saponin, alkaloids steroid and glycoside The results showed flavonoid was presence in all plant extracts. For the antimicrobial activity, the aqueous and methanolic extracts were tested by using disk diffusion method. Antimicrobial assay of methanolic crude extracts (25 to 100 mg/mL) showed effectiveness against the pathogenic bacteria. Comparatively, all aqueous extracts did not show any antimicrobial activity. Strong antibacterial activity was shown by the methanolic extracts of V. trifolia, A. vera and S. crispus while moderate antimicrobial activity was shown by C. nutans, P. grandifolia and P. pellucida. Conclusion, significance and impact study: The current results indicated that the studied plants might indeed be potential sources of natural antimicrobial agents to control fish diseases.
Plants, Medicinal

No abstract available.
Plants, Medicinal*

Aims: Plant diseases caused by pathogens are threatening crop yield. Agrochemicals are used extensively to curb pathogens. Efforts to reduce the usage of agrochemicals are needed for sustainable agriculture. This study was aimed to screen medicinal plants possessing antifungal properties against crop pathogenic fungi. Methodology and results: Sequential extraction using absolute n-hexane, ethyl acetate and methanol was performed on nine selected medicinal plants to obtain crude extract. An antifungal assay using these crude extracts was performed on Fusarium solani, Collectotrichum musae and two isolates of Pyricularia oryzae. The assay showed that medicinal plant species with all three types of crude extract inhibited the growth of all three pathogenic fungal species tested. The inhibitory effects of crude extracts were not only fungal species dependent but also isolate dependent. Conclusion, significance and impact of study Antifungal effect of nine selected medicinal plant species was observed against the three tested fungal pathogens. These research findings suggest that the selected medicinal plant species may serve as a potential source for the development of new biofungicide products.
Plants, Medicinal

Aims: Acalypha indica (AI), Centella asiatica (CA), and Sesbania grandiflora (SG) are vegetables commonly used in traditional medicine in Asian countries to treat skin problems. In this study, we investigated their pharmacological activities relevant to wound healing and synergistic actions to provide an insight into a promising vegetable combination as a candidate treatment for wounds. Methodology and results: The stimulatory, antioxidant, and antibacterial activities of aqueous (A) and methanol (M) extracts of all the three vegetables were assessed alone and in combination in normal human dermal fibroblast (NHDF) cells in vitro. CA-A (89.52%) and the combination of AI-A+CA-A (90.76%) produced the highest percentage of wound closure. AI-A exhibited the highest total phenolic content (TPC) (82.94 mg GAE/g) and moderate reducing activity (61.63 mM Fe (II)/mg) when assessed by ferric reducing antioxidant power (FRAP) assay. Free radical scavenging activity was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid), and the combination of AI-A+CA-A exhibited scavenging activity at IC50 = 379.75 µg/mL and IC50 = 578.7 µg/mL, respectively. Pre-treatment of NHDF cells with CA-M at 100 µg/mL offered the highest protection against hydrogen peroxide. All single and combined vegetable extracts showed poor antibacterial properties against Gram negative and Gram positive bacterial species implicated in wound infection. Only AI-A+CA-A executed synergism in fibroblast migration when assessed via the combination index (CI). Furthermore, screening and identification of AI-A, CA-A, and CA-M via UHPLC (LC-MS/MS) system revealed that the major components responsible for all the tested bioactivities were phenolic groups such as simple polyphenols, flavonoids, polysaccharides, and triterpenes (asiaticoside and madecassosides). Conclusion, significance and impact of study The vegetable extracts of A. indica, C. asiatica, and S. grandiflora exhibited good bioactivities independently. However, only AI-A+CA-A showed synergism in combination to accelerate the migration of fibroblast and increase antioxidant activities. These findings demonstrate the potential formulation of combined vegetable extracts from the two species of A. indica and C. asiatica for optimum wound healing properties.
Plants, Medicinal

Calophylloid, a coumarine - has been extracted from Calophyllum inophyllum L. of various countries in 1951. Here we report the isolation procedures of this substance from Calophyllum inophyllum L. collected in southern Vietnam and their structural elucidation were established using m.p., aD, IR, UV, EI-MS, 13C-NMR, 1H-HMR.
Seeds ; Plants, Medicinal ; Plants, Medicinal ; Medicine, Traditional

The quantification and qualification of polyphenols from the buds of Mac Rat (Delavaya toxocarpa Franch) collected in Son La and Cao Bang in the years 2002, 2003 using colum silicagel and sephadex LH20 chromatography gave 2 pure components. Basing on the data of the spectrium of UV, IR1H-NMR and 13C-NMR, DEPT, 2 compounds-acid pcumaric and kaemferol were identified
Flavonoids ; Plants, medicinal ; Pharmacology

Crateva advansonnii DC.-Capparaceae is a medicinal plant which has been used as an antidote for snakebite in Tay Ninh province and in Cambodia. The chemical study on the bark of this plant led to the isolation as a triperpen with structure was unambigously determined as epi-lupeol by UV, IR and NMR spectral data
Chemistry ; Capparaceae ; Plants, Medicinal

“Cỏ lưỡi rắn” (Hedyotis corymbosa (L.) and “lưỡi rắn hoa trắng” or “bạch hoa xà thiệt thảo” (Hedyotis diffusa Willd) are two different species. Both of them grow wildly in Viet nam. According to Viet nam traditional medicine, the species are used to make drug. They have antipyretic, detoxication effects, used in the treatment of inflammation and lesions induced by venomous bitten. Recently, the researchers determined active element in two species as ursolic acid, oleanolic acid and geniprosidic acid. These active ingredients have effect of tumor inhibition (in vivo and in vitro). In China, Hedyotis diffusa Willd was used to treat cancer
Plants, medicinal ; Medicine, Traditional

The bioactivity of flavonoid from H. sabdariffa growing in Vietnam have been investigated (signed by FHS). FHS have different effect on the inhibition of the growth and development of bacteria and fungus. Their good effects on the peroxydase activity in human blood and their liver protection from destroy by CCl4 has been expressed the antioxidant potency. On the basic of this antioxidant activity of flavonoid, the investigation of flavonoids effects on cancer cell sarcoma-180 have been realized and show that FHS could inhibit the mitosis of cancer cells. The in vivo tests have been realized on experimental animals. An optimal dose to reach the efficiency was determined (in vitro and in vivo). This result opened a perspective to apply the flavonoids of H. sabdariffa for anticancer therapy, chiefly for pre-cancer period.
Flavonoids ; Plants, Medicinal