@article {1191, title = {Biological Activity of Lasiodiplodia pseudotheobromae IBRL OS- 64 Extracts, an Endophytic Fungus Isolated from Medicinal Herb, Ocimum sanctum Against Foodborne Diarrhea-Caused Bacteria}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {June 2020}, pages = {897-904}, type = {Research Article}, chapter = {897}, abstract = {

Introduction: Foodborne disease is a serious public health problem worldwide and most of the disease is related to food spoilage by bacteria. Thus, there is a need for the discovery of a natural antibiotic to inhibit these foodborne bacteria. Materials and Methods: Disk diffusion and broth microdilution assays were performed to access the antibacterial activity of the fungal extracts against test bacteria. Meanwhile, the scanning electron microscope (SEM) was employed to study the structural degeneration of bacterial cells exposed to the extracts. Results: The ethyl acetate extract of Lasiodiplodia pseudotheobromae IBRL OS- 64 demonstrated favorable antibacterial activity towards all test bacteria with inhibition zone ranged from 15.0 mm to 26.0 mm. All test bacteria were resistant to hexane and butanolic extracts. Minimum inhibition concentration (MIC) values of the ethyl acetate extract between 62.5 μg/mL to 500 μg/mL whereas minimum bactericidal concentration (MBC) was in the range of 125 μg/mL to 2000 μg/mL. The SEM micrographs exhibited major abnormalities that occurred on the bacterial cells after exposure to the extract with alteration in their morphology and cell death beyond repair. Conclusion: The extracts of L. pseudotheobromae IBRL OS-64 may be an effective antibacterial agent to treat foodborne bacteria.

}, keywords = {Foodborne disease, Lasiodiplodia pseudotheobromae, Minimum bactericidal concentration, Minimum inhibitory concentration, Scanning electron microscope}, doi = {10.5530/pj.2020.12.127}, author = {Taufiq MMJ and Darah I} } @article {809, title = {Evergreen Conventional and Modern Microscopic Methods for Solving Various Cases of Forensic Botany by Morphological and Histological Study}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {January 2019}, pages = {171-176}, type = {Original Article}, chapter = {171}, abstract = {

Introduction: The study concerning forensic evidences commences from the physical examination. Microscopic examination serves a good preliminary technique and provides a relatively quick and non-destructive means of obtaining qualitative information without much sample preparation. Various plants or plant materials such as pollens at the crime scene or a rare plant type present near a murder victim can be helpful in connecting suspect to a victim or scene. For examination of such evidences, the initial step is the identification of collected botanical evidences. Scanning electron microscope (SEM) produces images that rely on secondary electrons image and is concerned primarily with the observation of surface topography. SEM images at all direction (X-Y-Z rotation) giving a three dimensional view of the sample under study. Methods: For morphological and histological examination, compound microscope and SEM has been used. Three plant specimens have been taken i.e. Cannabis sativa, Ricinus communis and Papaver somniferum. For compound microscopic examination, sample has been stained with saffranin dye and for SEM examination; sample surface has been coated with gold-palladium layer to make it conductive. Results: The morphological and histological examination by compound microscope and SEM revealed many characteristic features like ellipsoidal pollens in Ricinus, cystolythic trichomes in Cannabis, large oval stomata in poppy, etc. Conclusion: The microscopic examination of botanical evidences by such sophisticated technique like SEM holds a lot of scope in forensic investigations with minimal evidence destruction and maximum details can be obtained in a preliminary examination only without using other complicated techniques.

}, keywords = {Botanical evidences, Cannabis sativa, Papaver somniferum, Ricinus communis, Scanning electron microscope}, doi = {10.5530/pj.2019.1.28}, author = {Astha Pandey and Shalvi Agrawal and Amruta D Patel and Dushyant Pendarkar and Jalpa D Bambhaniya} } @article {509, title = {High Antioxidant and Phenolic Contents Related to Antibacterial Activity against Gastrointestinal Pathogenic Bacteria of Some Thai Medicinal Plants}, journal = {Pharmacognosy Journal}, volume = {10}, year = {2018}, month = {January 2018}, pages = {341-348}, type = {Original Article}, chapter = {341}, abstract = {

Objective: Thai medicinal plants were used as the traditional medicines and as part of everyday plants diet. Plants contain a mixture of phytochemical and exhibit a lot of functional food and medicinal properties. This project aims to investigate the potential of selected Thai medicinal plants according to the properties of their antioxidant and antibacterial activities. Methods: The eighteen plants were extracted using maceration method with 95\% ethanol. The antioxidant activity was evaluated by DPPH and FRAP assay. The total phenolic content was evaluated by Folin-Ciocalteu phenol reagent. The antibacterial activity was evaluated by agar disc diffusion method. The extract which exhibited high antioxidant and antibacterial activity was selected to observe morphological changes by the scanning electron microscope (SEM). Results: The extract of Caesalpinia sappan showed the highest activities on both antioxidant assayed by FRAP method and total phenolic contents, however, exhibited high antioxidant assayed by DPPH compared to Bauhinia strychnifolia extract. Moreover, the extract of C. sappan showed the excellent antibacterial activities against six pathogenic bacteria in Gastro-intestinal tract. The morphological change by SEM was selected for further investigation antibacterial activities of C. sappan extract. The results showed that the inhibitory effect to those bacterial strains could be caused by the disruption of the cell membrane and decrease biofilm formation after treatment with the extract. Conclusion: The ethanol extract of C. sappan exhibited strong antioxidant and antibacterial activities against the six pathogenic bacteria. This result suggested that C. sappan could be applied to use for medicinal purpose and functional products.

}, keywords = {Antibacterial activity, antioxidant activity, Caesalpinia sappan, Scanning electron microscope, total phenolic content}, doi = {10.5530/pj.2018.2.58}, url = {http://fulltxt.org/article/488}, author = {Parichat Phalanisong and Kanit Vichitphan and Jaehong Han and Sukanda Vichitphan} }