@article {1124, title = {Chemical Constituents, Antibacterial Activity and Mode of Action of Elephant Ginger (Zingiber officinale var. officinale) and Emprit Ginger Rhizome (Zingiber officinale var. amarum) Essential Oils}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {March 2020}, pages = {404-409}, type = {Research Article}, chapter = {404}, abstract = {

Introduction: Ginger (Zingiber officinale Rosc) is a spice plant, which is extensively used worldwide, and morphologically classified into three types, including the red, {\textquotedblleft}gajah{\textquotedblright} or {\textquotedblleft}elephant{\textquotedblright}, and {\textquotedblleft}emprit{\textquotedblright} ginger (common name in Indonesia). In addition, the extract and essential oils possess antibacterial pharmacological activities, due to the inherent constituents. The aim of this research, therefore, was to analyze the chemical constituents, test antibacterial activities, and observe the mode of action of elephant and emprit ginger rhizome essential oils. Methods: Essential oils isolation was conducted using water and steam distillation method, while microdilution method was adopted in the testing for antibacterial activities against Gram positive and negative bacteria. Furthermore, the mode of action was evaluated using Scanning Electron Microscopy (SEM). Results: The antibacterial activity demonstrated antibacterial activities in the essential oils of elephant and emprit ginger rhizome, with minimal inhibition concentrations (MIC) value of 250-1000 μg.mL-1 and minimal bacterial concentrations (MBC) value of 500-1000 μg.mL-1, while chemical evaluation showed the presence of 45 and 38 constituents, respectively. Conclusion: Both essential oils possess antibacterial activities against Gram positive and negative bacteria, with different strengths, which are based on chemical composition. Conversely, SEM micrographs demonstrated the ability for elephant and emprit ginger rhizome essential oils to change the morphology of bacteria.

}, keywords = {Antibacterial, Chemical constituents, Elephant ginger, Emprit ginger}, doi = {10.5530/pj.2020.12.62}, author = {Diki Prayugo Wibowo and Ria Mariani and Siti Uswatun Hasanah and Diah Lia Aulifa} } @article {489, title = {Phytochemical Screening, Antibacterial Activity, and Mode of Action on Morus nigra}, journal = {Pharmacognosy Journal}, volume = {10}, year = {2018}, month = {December 2017}, pages = {167-171}, type = {Original Article}, chapter = {167}, abstract = {

Introduction: The Morus nigra (Moraceae) known as black mulberry is a well-grown plant in Lembang, Indonesia. Previous studies showed that black mulberry fruit has activity as antibacterial and antioxidant. The aims of this study were to evaluate the antibacterial effect of ethanol extract from stem bark, fruit, and leaves of Morus nigra, MIC and morphological changes of the most active extract against Staphylococcus epidermidis and Propionibacterium acnes. Methods: Agar diffusion and microdilution assays were used to evaluate the antibacterial effect of the extract by measuring the zone of inhibition and the minimum inhibitory concentration (MIC) of the extract against the test bacteria. Scanning electron microscopy (SEM) was performed to evaluate the morphological changes induced by the extract in cellular membrane of the bacteria. Protein and ion leakage from the bacterial cells induced by the extract were also evaluated. Results: The antibacterial activity showed the most active extract was an ethanol extract of the stem bark against S. epidermidis and P. acnes with MIC value 4 mg/ml and 2 mg/ml, respectively. The extract also induced protein and ion leakage in test bacterial cells. SEM findings revealed that the extract induced potential cellular membrane damage in 4xMIC. Conclusion: The antibacterial activity was related to the damaged of bacterial cell wall.

}, keywords = {Cellular membrane damage., Morus nigra, Propionibacterium Acnes, Staphylococcus Epidermidis}, doi = {10.5530/pj.2018.1.28}, url = {http://fulltxt.org/article/414}, author = {Diah Lia Aulifa and Sani Nurlaela Fitriansyah and Seno Aulia Ardiansyah and Diki Prayugo Wibowo and Yolanda Armiliani Julata and Desty Santi Christy} }