Chandra Risdian
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View article: Utilization of Kombucha SCOBY Waste Modified by Fe<sub>3</sub>O<sub>4</sub>/ZIF-8 for Antibacterial Wound Application
Utilization of Kombucha SCOBY Waste Modified by Fe<sub>3</sub>O<sub>4</sub>/ZIF-8 for Antibacterial Wound Application Open
Wound dressing is an essential medical device used to cover wounds on the skin, but the lack of wound protection from bacterial infection has become a major issue nowadays. This research aims to develop a wound application from modified sy…
View article: Optimization of antimicrobial activity of sea cucumber Holothuria scabra extract using reflux extraction based on two levels factorial analysis
Optimization of antimicrobial activity of sea cucumber Holothuria scabra extract using reflux extraction based on two levels factorial analysis Open
Sea cucumber Holothuria scabra is a potential export commodity in the fisheries sub-sector. Some are used indirectly in extract form. Selection of the extraction method is carried out by considering its activity. One of the benefits that i…
View article: Pseudoternary Phase Diagram and Antibacterial Activity of Microemulsion-Based Citronella Oil
Pseudoternary Phase Diagram and Antibacterial Activity of Microemulsion-Based Citronella Oil Open
Citronella oil (CTO) is extracted from citronella leaves by maceration or steam distillation process, which has antibacterial and insect-repellent activities. However, the use of CTO is limited and requires modification in other formulatio…
View article: One-Pot Synthesis Green Zinc Oxide Nanoparticles immobilized on Activated Carbon derived from Pineapple Peel for Adsorption of Pb(II)
One-Pot Synthesis Green Zinc Oxide Nanoparticles immobilized on Activated Carbon derived from Pineapple Peel for Adsorption of Pb(II) Open
The current study introduces a one-pot technique for synthesizing an environmentally benign and cheap composite adsorbent, namely ZnO-PPAC, for the adsorption of Pb(II). The designated adsorbent was prepared by incorporating green synthesi…
View article: Isolation, characterisation and description of the roseoflavin producer <i>Streptomyces berlinensis</i> sp. nov.
Isolation, characterisation and description of the roseoflavin producer <i>Streptomyces berlinensis</i> sp. nov. Open
The Gram‐positive bacteria Streptomyces davaonensis and Streptomyces cinnabarinus have been the only organisms known to produce roseoflavin, a riboflavin (vitamin B 2 ) derived red antibiotic. Using a selective growth medium and a phenotyp…
View article: Optimization of Loop-Mediated Isothermal Amplification Reaction for Detecting Streptococcus pneumoniae Serotypes in Clinical Nasopharynx Swab Samples
Optimization of Loop-Mediated Isothermal Amplification Reaction for Detecting Streptococcus pneumoniae Serotypes in Clinical Nasopharynx Swab Samples Open
Current molecular PCR-based methods for identifying Streptococcus pneumoniae , the primary cause of pneumonia, meningitis, and other invasive diseases, are accurate but require expensive infrastructure and have a long run time, which restr…
View article: Protease production by soil bacteria for green technology: Screening and optimization
Protease production by soil bacteria for green technology: Screening and optimization Open
Protease is a type of enzyme that hydrolyzes proteins into peptides and amino acids. The demand for protease for green technology in some industries like detergent, food, and leather is increasing nowadays. Some soil bacteria, especially t…
View article: Production of antibacterial and antioxidant agents by Actinobacteria using soybean meal as a nitrogen source
Production of antibacterial and antioxidant agents by Actinobacteria using soybean meal as a nitrogen source Open
Actinobacteria are mainly found in soil and some of them have properties that are common to bacteria and fungi, despite having quite distinct characteristics. Unlike bacterial colonies in general, which are clearly slimy and grow rapidly, …
View article: Phyto-assisted synthesis of zinc oxide nanoparticles using mango (Mangifera indica) fruit peel extract and their antibacterial activity
Phyto-assisted synthesis of zinc oxide nanoparticles using mango (Mangifera indica) fruit peel extract and their antibacterial activity Open
A facile and eco-friendly procedure was developed to fabricate zinc oxide nanoparticles (ZnO NPs) using an aqueous extract of mango fruit peel (MFP), a by-product of agroindustry. The ZnO NPs were fabricated using zinc acetate as a precurs…
View article: Synthesis and characterization of calcium phosphate (tricalcium phosphate/calcium pyrophosphate) from snail shells (Achatina fulica)
Synthesis and characterization of calcium phosphate (tricalcium phosphate/calcium pyrophosphate) from snail shells (Achatina fulica) Open
Snail ( Achatina fulica ) is one of the sources of duck fodder commonly used by local breeders to meet protein needs of poultry farms. However, its shells as a by-product are rarely used and just become waste. To overcome this problem, we …
View article: Antibacterial potential of zinc oxide nanoparticles derived from pineapple peel aqueous extract
Antibacterial potential of zinc oxide nanoparticles derived from pineapple peel aqueous extract Open
Pineapple peel waste contains antioxidant molecules. This paper describes a facile, efficient, and environmentally friendly approach for synthesizing ZnO nanoparticles using pineapple peel aqueous extract. This method aims to reduce the us…
View article: Winogradskyella luteola sp.nov., Erythrobacter ani sp. nov., and Erythrobacter crassostrea sp.nov., isolated from the hemolymph of the Pacific Oyster Crassostrea gigas
Winogradskyella luteola sp.nov., Erythrobacter ani sp. nov., and Erythrobacter crassostrea sp.nov., isolated from the hemolymph of the Pacific Oyster Crassostrea gigas Open
Three new bacterial strains, WHY3 T , WH131 T , and WH158 T , were isolated and described from the hemolymph of the Pacific oyster Crassostrea gigas utilizing polyphasic taxonomic techniques. The 16S rRNA gene sequence analysis revealed th…
View article: Corallococcus soli sp. Nov., a Soil Myxobacterium Isolated from Subtropical Climate, Chalus County, Iran, and Its Potential to Produce Secondary Metabolites
Corallococcus soli sp. Nov., a Soil Myxobacterium Isolated from Subtropical Climate, Chalus County, Iran, and Its Potential to Produce Secondary Metabolites Open
A novel myxobacterial strain ZKHCc1 1396T was isolated in 2017 from a soil sample collected along Chalus Road connecting Tehran and Mazandaran, Iran. It was a Gram-negative, rod-shaped bacterial strain that displayed the general features o…
View article: Photobacterium arenosum WH24, Isolated from the Gill of Pacific Oyster Crassostrea gigas from the North Sea of Germany: Co-cultivation and Prediction of Virulence
Photobacterium arenosum WH24, Isolated from the Gill of Pacific Oyster Crassostrea gigas from the North Sea of Germany: Co-cultivation and Prediction of Virulence Open
Cream colored bacteria from marine agar, strain WH24, WH77, and WH80 were isolated from the gill of the Crassostrea gigas a Pacific oyster with a filter-feeding habit that compels accompanying bacteria to demonstrate a high metabolic capac…
View article: Antimicrobial potential of culturable actinobacteria isolated from the Pacific oyster Crassostrea gigas (Bivalvia, Ostreidae)
Antimicrobial potential of culturable actinobacteria isolated from the Pacific oyster Crassostrea gigas (Bivalvia, Ostreidae) Open
Aims Explore the diversity of culturable actinobacteria isolated from the Pacific oyster Crassostrea gigas with special emphasis on their antimicrobial activity. Methods and Results For the characterization of the isolated actinobacteria, …
View article: Qipengyuania pacifica sp. nov., a Novel Carotenoid-Producing Marine Bacterium of the Family Erythrobacteraceae, Isolated from Sponge (Demospongiae), and Antimicrobial Potential of Its Crude Extract
Qipengyuania pacifica sp. nov., a Novel Carotenoid-Producing Marine Bacterium of the Family Erythrobacteraceae, Isolated from Sponge (Demospongiae), and Antimicrobial Potential of Its Crude Extract Open
A marine Alphaproteobacterium designated as strain NZ-96T was isolated in February 2021, from a sponge species (Demospongiae) collected in muddy sediments with boulders and old chimneys in Otago/Canterbury Slope, Pacific Ocean, New Zealand…
View article: Pacificimonas pallium sp. nov., an Isolated Bacterium from the Mantle of Pacific Oyster Crassostrea gigas in Germany, and Prediction of One-Carbon Metabolism
Pacificimonas pallium sp. nov., an Isolated Bacterium from the Mantle of Pacific Oyster Crassostrea gigas in Germany, and Prediction of One-Carbon Metabolism Open
A yellow bacterium from marine agar, strain WHA3T, was isolated from the mantel of the Pacific oysters Crassostrea gigas in the Wilhelmshaven Sea in northern Germany. Based on the 16S rRNA gene sequence, strain WHA3T had a high similarity …
View article: Alteriqipengyuania abyssalis sp. nov., a Novel Member of the Class Alphaproteobacteria Isolated from Sponge, and Emended Description of the Genus Alteriqipengyuania
Alteriqipengyuania abyssalis sp. nov., a Novel Member of the Class Alphaproteobacteria Isolated from Sponge, and Emended Description of the Genus Alteriqipengyuania Open
A novel Gram-negative, aerobic, motile, lemon-yellow-colored, and non-spore-forming rod-shaped bacterium designated strain NZ-12BT was isolated in February 2021 from a sponge species (Crateromorpha) collected at the southern Kermadec Ridge…
View article: Zooshikella harenae sp. nov., Isolated from Pacific Oyster Crassostrea gigas, and Establishment of Zooshikella ganghwensis subsp. marina subsp. nov. and Zooshikella ganghwensis subsp. ganghwensis subsp. nov.
Zooshikella harenae sp. nov., Isolated from Pacific Oyster Crassostrea gigas, and Establishment of Zooshikella ganghwensis subsp. marina subsp. nov. and Zooshikella ganghwensis subsp. ganghwensis subsp. nov. Open
Here, we describe the polyphasic taxonomy of a novel isolated strain WH53T from the genus Zooshikella isolated from the sand sediment located between the lumen of the Crassostrea gigas From Germany. Phylogenetic analysis determined that th…
View article: Ecological and Pharmacological Activities of Polybrominated Diphenyl Ethers (PBDEs) from the Indonesian Marine Sponge Lamellodysidea herbacea
Ecological and Pharmacological Activities of Polybrominated Diphenyl Ethers (PBDEs) from the Indonesian Marine Sponge Lamellodysidea herbacea Open
Two known Polybrominated Diphenyl Ethers (PBDEs), 3,4,5-tribromo-2-(2′,4′-dibromophenoxy)phenol (1d) and 3,4,5,6-tetrabromo-2-(2′,4′-dibromophenoxy)phenol (2b), were isolated from the Indonesian marine sponge Lamellodysidea herbacea. The s…
View article: Production of Omega-3 Fatty Acids by Enzymatic Hydrolysis from Lemuru Fish By-Products
Production of Omega-3 Fatty Acids by Enzymatic Hydrolysis from Lemuru Fish By-Products Open
Production of omega-3 fatty acids from lemuru fish by-products was studied by enzymatic hydrolysis using a lipase enzyme in one liter of the batch reactor. The hydrolysis temperature of fish oil was set at 45 to 55 ℃ for 0 to 24 h, whereas…
View article: Amycolatomycins A and B, Cyclic Hexapeptides Isolated from an Amycolatopsis sp. 195334CR
Amycolatomycins A and B, Cyclic Hexapeptides Isolated from an Amycolatopsis sp. 195334CR Open
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 sp…
View article: Isolation and identification of<i>Streptomyces</i>sp. Act4Zk, a good producer of Staurosporine and some derivatives
Isolation and identification of<i>Streptomyces</i>sp. Act4Zk, a good producer of Staurosporine and some derivatives Open
In this study, strain Streptomyces sp. Act4Zk was isolated based on a method developed for the isolation of myxobacteria. Due to the low efficiency of the majority of conventional DNA extraction techniques, for molecular identification of …
View article: Nonocarbolines A–E, β-Carboline Antibiotics Produced by the Rare Actinobacterium Nonomuraea sp. from Indonesia
Nonocarbolines A–E, β-Carboline Antibiotics Produced by the Rare Actinobacterium Nonomuraea sp. from Indonesia Open
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). T…
View article: Biosynthesis of Polyketides in Streptomyces
Biosynthesis of Polyketides in Streptomyces Open
Polyketides are a large group of secondary metabolites that have notable variety in their structure and function. Polyketides exhibit a wide range of bioactivities such as antibacterial, antifungal, anticancer, antiviral, immune-suppressin…
View article: Biosynthesis of Polyketides in <em>Streptomyces</em>
Biosynthesis of Polyketides in <em>Streptomyces</em> Open
Polyketides are large group of secondary metabolites that have notable variety in their structure and function. Polyketides exhibit a wide range of bioactivities such as antibacterial, antifungal, anticancer, antiviral, immune-suppressing,…
View article: Pineapple peel wastes as a potential source of antioxidant compounds
Pineapple peel wastes as a potential source of antioxidant compounds Open
Indonesia is a large pineapple (Ananas comosus) producing country. Food industries in Indonesia processed this fruit for new products and further resulted wastes of which cause an environmental problems. Approximately, one pineapple fruit …
View article: Production of antioxidant compounds of grape seed skin by fermentation and its optimization using response surface method
Production of antioxidant compounds of grape seed skin by fermentation and its optimization using response surface method Open
Skins and seeds of grape are waste generated from food industry. These wastes contain nutrients of which able to be utilized as an important source for antioxidant metabolite production. Through an environmentally friendly process, natural…
View article: Bioactivity of Polysaccharide from Gracilaria Verrucosa as α-Glucosidase Inhibitor
Bioactivity of Polysaccharide from Gracilaria Verrucosa as α-Glucosidase Inhibitor Open
Seaweeds are known to be important source of secondary metabolites for pharmaceutical industry in drug development. Gracilaria genus are a potential source for alternative natural medicines. One kind of Gracilaria species is Gracilaria ver…