Gian Primahana

Verified

Gian verified their affiliation via an institutional email.

Learn more

Verified

Gian verified their affiliation via an institutional email.

Learn more

• Dr. rer. nat
• Junior Researcher at National Research and Innovation Agency

Cadmium (Cd) increases oxidative stress, which increases the likelihood of health problems. To protect the body from oxidative stress, natural antioxidants obtained from plants are required. The kabau plant (Archidendron bubalinum) is thought to have antioxidant phytochemicals. The purpose of this study was to assess the antioxidant activity and to...

Antibacterial screening of endophytic fungi from Salacia intermedia identified Diaporthe longicolla as a potent strain exhibiting good activity against multidrug-resistant Staphylococcus aureus and Pseudomonas aeruginosa, with an MIC of 39.1 µg/mL. Scale-up fermentation and chromatographic purification of this strain yielded three known compounds,...

The increasing pollution which promotes accumulation of free radicals and a significant number of bacterial resistances to antibiotics have prompted various efforts to search for new sources of bioactive compounds. The aim of this study was to investigate the antibacterial and antioxidant properties of bioactive compounds produced by endophyte bact...

Indonesia has a high biodiversity, which can be relied upon as a potential source of medicinal materials. One of the medicinal plants in Indonesia is Kaempferia galanga, which demonstrates various pharmacological properties, including antibacterial, anti-inflammatory, antioxidant, anticancer, and antiangiogenic effects. However, directly extracting...

Ikan opah (Lampris guttatus) merupakan salah satu jenis ikan laut yang mengandung kadar formaldehida alami cukup tinggi. Hal tersebut menjadi hambatan utama karena disebabkan oleh pendeteksian formaldehida alami dan formaldehida artifisial yang ditambahkan. Pembusukan pada ikan dapat mengakibatkan pembentukan formaldehida secara alami melalui reduk...

The global increase in multidrug-resistant (MDR) bacterial infection has rapidly gained concern globally. This study aimed to investigate antibacterial and antibiofilm potential of 25 soil actinomycete strains against MDR strains including Escherichia coli strain M4, Pseudomonas aeruginosa strain M19, Klebsiella pneumoniae strain M19, Bacillus subt...

The main problem with food authenticity is that labels and information that are not clear about where the ingredient in food comes from. One of ingredient that difficult to detect where the sources which used as raw materials is gelatine. Therefore, the detection method that is easy to use, quick, accurate, low-cost, and more efficient is necessary...

Ramalina sp. (Ramalinaceae) is a type of lichen known to contain many active secondary metabolite compounds that have the potential to be used as medicine or medicinal raw materials. One of the biological activities possessed by Ramalina sp. lichen is its anticancer activity. This research aims to isolate and identify active secondary metabolite co...

Natural products and their structural analogs are the main sources of pharmacotherapy. Various Aglaia species have been investigated since the 1960s for their phytochemical constituents and biological properties. This research focuses on isolating the terpenoid group from Aglaia shawiana, to provide a basis for further research to identify lead com...

The study on Macarang hypolueca (Reichb.f. & Zoll.), which was collected from secondary forests around Samarinda City, East Kalimantan, involved phytochemical investigations that led to the isolation of a flavone type compound of flavonoid from the ethyl acetate fraction. To separate the compounds, silica gel column chromatography was utilized with...

The Macaranga species (Euphorbiaceae), also known locally as "mahang", has been used in traditional medicine due to its potential health benefits. Around 12 species of the Macaranga have been found to contain more than 50 flavonoid compounds, which are the primary secondary metabolites in this genus. Free radicals can lead to organ damage, resultin...

Nyatoh plant (Palaquium amboinense B.) is native to Indonesia which is known to have the ability to produce potential secondary metabolites. The aim of this study was to evaluate the antibacterial and antioxidant activities from bioactive compounds produced by endophytic bacteria from nyatoh leaves. Five endophytic bacteria were tested against 4 ta...

Centella asiatica (L.) Urban is known to have a pharmacological effect as an antioxidant. Indonesian research on gotu kola, especially the ethyl acetate fraction it produces, is rarely carried out. Previous research stated that kaempferol and quercetin which isolated from the ethyl acetate fraction of Centella asiatica herb had antioxidant activity...

The global increase in multidrug-resistant (MDR) bacterial infection has rapidly been gaining concern and leading for investigating new strategies to tackle this problem. In this study, the antibacterial potential of 25 soil actinomycetes strain has been evaluated by initial screening against MDR bacterial strains including Escherichia coli strain...

Soil Streptomyces are filamentous Gram-positive bacteria which were the biggest producer of remarkable bioactive compounds with multiple biological roles. This study aimed to assess the antioxidant and cytotoxic activities of crude extract derived from 3 soil Streptomyces strains, namely APM-7, APM-11, and APM-21, which was isolated from Muna Islan...

Aglaia foveolata Pannell ( A. foveolata ) is a type of plant that has many benefits, including the skin, leaves, roots, and seeds as medicinal ingredients. The potential of this plant is inseparable from the content of various bioactive compounds. This study aims to isolate, characterize the active compound from the stem bark of A. foveolata and te...

With about 120 species, Aglaia is one of the largest genera of the plant family Meliaceae (the mahogany plants). Various Aglaia species have been investigated since the 1960s for their phytochemical constituents and biological properties. This research objective was to find secondary metabolites that have activity as anti-breast cancer compounds fr...

During an ethnopharmacology study of traditional antidiabetic treatment in Gunung Sari village, Bogor region, Indonesia, fifteen traditional medicinal plants were selected, collected and prepared as crude extracts. Among fifteen plants, only three plants have previously been screened for dipeptidyl peptidase-IV (DPP-IV) inhibitors. Quantitative phy...

Paederia foetida Linn. is a rich source of active compounds, yet its antioxidant and cytotoxic properties remain poorly studied. This current research aimed to investigate the chemical profiles of a crude extract derived from P. foetida leaves, its fractionated substances, and their antioxidant and cytotoxic properties on MCF-7 cells, a breast carc...

Mangroves are unique intertidal ecosystems that provide ecological niches to different microbes, which play various roles in nutrient recycling and diverse environmental activities. The association between myxobacteria and mangroves are hitherto poorly understood. The aim of our study was to evaluate the myxobacterial community composition as well...

Morinda citrifolia fruit (Noni) has been used as a folk medicine in several countries. Noni possessed various pharmacological activities such as; anticancer, antidiabetic, antihypertensive, antarthritic, and antioxidants. The present study evaluated pharmacognostic properties, profiling of active constituent through High-Performance Thin Layer Chro...

The xylariaceous genus Dematophora has recently been resurrected and segregated from Rosellinia based on a molecular phylogeny and morphological characters. This was an important taxonomic change because Dematophora in the current sense contains several important pathogens, while Rosellinia is limited to mainly saprotrophic species that have an end...

Laying the groundwork on preliminary structure–activity relationship study relating to the disruptive activity of cytochalasan derivatives on mammalian cell actin cytoskeleton, we furthered our study on the cytochalasans of the Dothideomycetes fungus, Sparticola triseptata. A new cytochalasan analog triseptatin (1), along with the previously descri...

Axenic fermentation on solid rice of the saprobic fungus Sparticola junci afforded two new highly oxidized naphthalenoid polyketide derivatives, sparticatechol A (1) and sparticolin H (2) along with sparticolin A (3). The structures of 1 and 2 were elucidated on the basis of their NMR and HR-ESIMS spectroscopic data. Assignment of absolute configur...

Submerged mycelial cultures of the ascomycete Colpoma quercinum CCTU A372 were found to produce five previously undescribed tetramic acids, for which we propose the trivial names colposetins A–C (1–3) and colpomenoic acids A and B (4 and 5), along with the known compounds penicillide (6) and monodictyphenone (7). The planar structures of 1–5 were d...

The rare actinobacterium Amycolatopsis sp. strain 195334CR was found to produce previously undescribed cyclic hexapeptides, which we named amycolatomycin A and B (1 and 2). Their planar structures were determined by high-resolution mass spectrometry as well as extensive 1D and 2D NMR spectroscopy, while the absolute stereochemistry of its amino aci...

During the course of our ongoing screening for novel biologically active secondary metabolites, the rare Actinobacterium, Nonomuraea sp. 1808210CR was found to produce five unprecedented β-carboline derivatives, nonocarbolines A–E (1–5). Their structures were elucidated from high-resolution mass spectrometry, 1D and 2D nuclear magnetic resonance sp...

The bioassay-guided fractionation from cultures of the actinobacterium Saccharothrix xinjiangensis Act24Zk, collected from the Caspian Sea beach in Iran led to the isolation of three new compounds, caerulomycin M (1), saccharopyrone (2), and saccharonoic acid (3), together with the known compound, caerulomycin A (4). Their structures were elucidate...

Actinobacteria have an important role in human medicine as antibiotic producers. Investigation to discover novel antibiotic drugs is necessary for the next future and Actinobacteria are still prominent sources of antibiotics, especially those isolated from the area that has such a huge biodiversity like Indonesia. Indonesia consists of thousands of...

Cinchonine is a type of cinchona alkaloid compound commonly found and/or isolated from Cinchona sp. plant. It is commonly used to treat malaria, and can potentially be used against cancer cells. In this particular study, cinchonine ester derivatives were extracted through esterification processs. Synthesized esther is aimed to gain higher lipophili...

C ledgeriana is a medicinal plant that contains alkaloids, especially on the barks for commercial production of quinine as antimalarial. The main alkaloids in this plant are cinchonine, cinchonidine, quinine and quinidine. Besides for antiamalarial this plant is also commonly used to treat whooping cough, influenza and dysentery. Compare to other m...

Myrictica fatua Houtt widely used in Indonesian as one of the traditional medicinal plants. Cancer and diabetic mellitus (DM) type 2 are two degenerative diseases caused by the presence of excessive free radicals in the body. Antioxidant and anti-diabetic active compounds were needed to reduce the risk of the diseases. One of the chemical compound...

This research was aimed to synthesize cinchonidine isobutyrate ester and conduct a preliminary assay for anticancer agent using cytotoxicity assay to Artemia salina Leach larva, or also known as brine shrimp lethality test (BSLT). Cinchonidine, a compound that has quinoline rings and quiniclidine ring, is a quinine analogue and stereoisomer of cinc...

P-glycoprotein (P-gp) resistance in cancer cells decreases the intracellular accumulation of various anticancer drugs. This multidrug resistance (MDR) protein can be modulated by number of non-cytotoxic drugs. We have screened 30 cinchona alkaloids derivatives as a potent P-gp inhibitor agent in silico. Hereby, we report the highest potential inhib...

Cinchona species especially the barks are commonly known for commercial production of quinine as antimalarial. Although it is also reported for treatment of depurative, whooping cough, influenza and dysentery. In this paper we reported in vitro examination of other bioactivities (antidiabetes, antioxidant and in vitro cytotoxicity) of 70% ethanol e...

Apigenin-8-C-glycoside (1), a flavonoid glycoside compound has been isolated from the leaves of Macaranga gigantifolia Merr. Isolation and purification conducted by chromatography methods and chemical structure characterization carried out by spectroscopic methods. Cytotoxicity of Apigenin-8-C-glycoside has been tested against Murine leukemia P-388...

Synthesis of 2-allylphenyl cinnamate has been done via coupling reaction between cinnamic acid and 2-allyl phenol catalyzed by DCC/DMAP. Their preliminary toxicity activity evaluation was calculated using Brine Shrimp Lethality Test (BSLT) method. Synthesis of the title compound was performed in 2 steps. Firstly, trans methyl cinnamate isolated fro...

A new prenylated flavonoid compound 5,7,3’,4’-tetrahydroxy-3,6-diprenylflavone (1) has been isolated from methanol extract of the leaves of Macaranga gigantifolia Merr. Isolation was performed using chromatography methods and their structures were elucidated based on spectroscopic data. cytotoxic activity against murine leukemia P-388 cell line con...

Natural minerals such as zeolite are local natural resources in the various regions in Indonesia which has application as a filler, bleaching agent, or dehydration agent. It also has function as green catalysts material for biomass conversion into bio-fuel. The trend movement of green and sustainable chemistry research that designing environmentall...