9 results for “Rika Indri Astuti”

Research ArticleOpen accessIn the author namesApoptosis in Yeast is Modulated by Clove Leaf Extract and Eugenol Potentially by Interfering Caspase YCA1Septyani Amini, Rika Indri Astuti, Irmanida BatubaraApoptosis is a process of cell death important for preventing the development of diseases such as cancer, neurodegenerative disorders, autoimmune, and cardiovascular disease. Apoptosis is reported to be potentially induced by antioxidant compounds, including phytoextract. Thus in this study, we determined the potential of apoptotic modulation in yeast cells by clove extract, which was rich in eugenol. Apoptotic in yeast … …OnLine Journal of Biological Sciences, Vol. 22, Issue 3 · 15 Sep 2022 · 5,497 accessesView PDF Cite

Research ArticleOpen accessIn the author namesCell Longevity of Yeast Saccharomyces cerevisiae by Clove Bud Extract Treatment May Occur in Sirtuin-Independent PathwayZahrah Qolbaina Ariybah, Rika Indri Astuti, Sri ListiyowatiAccumulation of free radicals causes cell damage that leads to a phenomenon called aging. Antioxidant application is one potential strategy to avoid the damage of free radical accumulation. Many reports resume that clove, one of Indonesia’s spices, contain high amount of antioxidant. Our previous research had proven that clove extract could extend longevity in yeast Saccharomyces cerevisiae. However, cellular mechanism … …OnLine Journal of Biological Sciences, Vol. 21, Issue 3 · 3 Aug 2021 · 6,659 accessesView PDF Cite

Research ArticleOpen accessIn the author namesModulation of Aging in Yeast Saccharomyces cerevisiae by Roselle Petal Extract (Hibiscus sabdariffa L.)Sarima, Rika Indri Astuti, Anja MeryandiniCellular aging drives diseases. Free radicals are called the main cause of cellular aging. Antioxidants can protect the body from free radical attack by reducing its negative effects. An antioxidant source can be obtained from plants, such as roselle (Hibiscus sabdariffa. L). This research was conducted to analyze the ability of roselle petals extract to increase the life span of … …American Journal of Biochemistry and Biotechnology, Vol. 15, Issue 1 · 6 Apr 2019 · 9,646 accessesView PDF Cite

Research ArticleOpen accessIn the author namesPlant Growth Promoting Activity of Actinomycetes Isolated from Soybean RhizosphereAris Tri Wahyudi, Jepri Agung Priyanto, Resti Afrista et al.Plant Growth Promoting Rhizobacteria (PGPR) is considered as the biological agent for improving plant growth. One Group of PGPR that have an important role in growth promoting of plant is Actinomycetes. The objective of this study was to isolate and screen Actinomycetes isolated from soybean rhizosphere as growth promoter of soybean in vitro. Fifty-three Actinomycetes isolates have successfully been isolated … …OnLine Journal of Biological Sciences, Vol. 19, Issue 1 · 5 Jan 2019 · 14,604 accessesView PDF Cite

Research ArticleOpen accessIn the author namesScreening and Characterization of Sponge-Associated Bacteria Producing Bioactive Compounds Anti-Vibrio sp.Aris Tri Wahyudi, Jepri Agung Priyanto, Wenang Maharsiwi, Rika Indri AstutiIn Indonesia, vibriosis is the main disease in shrimp. This disease is caused by Vibrio sp that may decrease the productivity of shrimp cultivation. Thus, exploration for new bioactive compounds as vibriosis biocontrol agent is necessary. Marine sponge-associated bacteria is one of many sources for bioactive compounds. The aim of this study was to screen marine sponge-associated bacteria producing anti-Vibrio … …American Journal of Biochemistry and Biotechnology, Vol. 14, Issue 3 · 5 Oct 2018 · 10,357 accessesView PDF Cite

Research ArticleOpen accessIn the author namesEthanol Production by Novel Proline Accumulating Pichia kudriavzevii Mutants Strains Tolerant to High Temperature and Ethanol StressesRika Indri Astuti, Sena Alifianti, Ratu Nabila Maisyitoh et al.Accumulation of osmoprotectant molecule, proline, has been reported to induce a stress tolerance phenotype in yeast cells. In this study, two ethanologenic isolates of yeast, Pichia kudriavzevii (R and T), both capable of using both five and six sugar compounds to produce ethanol, were mutated via ethyl methanesulfonate (EMS) treatment. Prolineaccumulating mutant strains were selected by using proline-analogue (L-azetidine-2-carboxylic acid). … …OnLine Journal of Biological Sciences, Vol. 18, Issue 3 · 11 Sep 2018 · 7,838 accessesView PDF Cite

Research ArticleOpen accessIn the author namesBioactive Compounds from Sponge Associated Bacteria: Anticancer Activity and NRPS-PKS Gene Expression in Different Carbon SourcesJepri Agung Priyanto, Rika Indri Astuti, Jun Nomura, Aris Tri WahyudiSponge associated bacteria with diverse NRPS-PKS genes could be the alternative source of bioactive compounds. This study aimed to analyze the activity as well as the regulatory mechanism regarding the anticancer properties derived from these bacteria against cancer cell lines. Extraction of bacterial metabolites using ethyl acetate solvent resulted yield ranging from 0.003 to 0.016% (w/v). Six extracts of bacterial … …American Journal of Biochemistry and Biotechnology, Vol. 13, Issue 4 · 5 Oct 2017 · 8,886 accessesView PDF Cite

Research ArticleOpen accessIn the author namesScreening of Pseudomonas sp. Isolated from Rhizosphere of Soybean Plant as Plant Growth Promoter and Biocontrol AgentAris Tri Wahyudi, Rika Indri Astuti, GiyantoAbstract: Problem statement: Pseudomonas spesies are one of the rihizobacterial group that have an important role in plant growth promoter and plant health. To prepare them as inoculants, they must have a range of characters as growth promoter such as Indole Acetic Acid (IAA) producers which can promote the growth of plants and solubilize phosphates. In addition, they must also … …American Journal of Agricultural and Biological Sciences, Vol. 6, Issue 1 · 10 Mar 2011 · 9,882 accessesView PDF Cite