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2021 Lake Poso's shrimp fauna revisited: the description of five new species of the genus Caridina (Crustacea, Decapoda, Atyidae) more than doubles the number of endemic lacustrine species Werner Klotz, Thomas von Rintelen, Chris Lukhaup, Kristina von Rintelen Lake Poso, an ancient lake system on the Indonesian island Sulawesi, harbours an endemic species flock of six, four lacustrine and two riverine species of the freshwater shrimp genus Caridina. In this study, five new lacustrine species are described, bringing the total to eleven species altogether. The number of lacustrine species is more than doubled to nine species compared to the last taxonomic revision in 2009. One of them, Caridina mayamareenae Klotz, Wowor & von Rintelen, sp. nov., even represents the first case of an atyid shrimp associated with freshwater snails which is morphologically adapted to living in shells. An… Lihat
2021 Status of Cassine koordersii, a tree endemic to East Java and last collected in 1898 Enggal Primananda,Dipta Sumeru Rinandio,Hendra Helmanto,Iyan Robiansyah,Megan Barstow Status of Cassine koordersii, a tree endemic to East Java and last collected in 1898 Lihat
2021 Artocarpanone isolated from Artocarpus heterophyllus heartwoods enhances cytotoxic effect of cisplatin against H460 and MCF-7 cell lines Artocarpus heterophyllus has been used as a folk medicine in Asian countries. Flavonoid possessed a wide-range of therapeutic compoundsfor the treatment of several diseases including cancer prevention. Artocarponanone is s flavonoid isolated from the heartwoods of A. heterophyllus. This study was undertaken to investigate the interaction of natural compound and commercial anticancer, cisplatin against two cancer cell lines. MTT assay was performed to determine the cytotoxic effect of the combination. Isobologram analysis was used to predict the interaction of combination against cancer cell lines. The effect of this combination was then confirmed using AO/PI staining method. It showed that artocarpanone… Lihat
2021 ANTIOXIDANT ACTIVITY OF BIOACTIVE PEPTIDE DERIVED FROM PEKIN DUCK FEET GELATIN HYDROLYSATE Malaysia is one of the main producers of duck meat globally with increasing demands. Increasing in duck production will also increase the number of duck by-products such as skin, feet and bones. Pekin duck (Anas platyrhyncos domestica) is one of the famous duck breeds. Gelatin that was extracted from Pekin duck feet has shown a potential raw material for the production of bioactive peptide that can involve in various functions of the organism physiologically for example antioxidant effects. Pekin Duck feet gelatin was hydrolyzed by using five commercial enzymes (Alcalase, Esperase, Flavourzyme, Neutrase and Protamex) to identify radical scavenging potencies… Lihat
2021 The mineralogic and isotopic fingerprint of equatorial carbonates: Kepulauan Seribu, Indonesia Dwi Amanda Utami,Sri Yudawati Cahyarini, Lars Reuning, Maximillian Hallenberger Kepulauan Seribu is an isolated patch reef complex situated in the Java Sea (Indonesia) and is a typical example for a humid, equatorial carbonate system. We investigate the mineralogical and isotopic fingerprint of Panggang, one of the reef platforms of Kepulauan Seribu, to evaluate differences to other carbonate systems, using isotope in combination with XRD and SEM analysis. A characteristic property of shallow water ( Lihat
2021 Biogeography of polychaete worms (Annelida) of the world Joko Pamungkas,Christopher J. Glasby & Mark J. Costello The global biogeography of polychaete worms has never been assessed previously. In the present study, we studied the world distribution patterns of polychaetes based on datasets obtained from the Global Biodiversity Information Facility, the Ocean Biogeographic Information System and our recently published checklist of Indonesian polychaete species. Polychaete biogeographic regions were visualized using ‘Infomap Bioregions’, and the latitudinal species richness gradient of the animals was examined using 3 metrics, i.e. alpha, gamma and estimated species richness (the last metric was adjusted for sampling bias). We identified 11 major polychaete biogeographic regions. The North Atlantic, Australia and Indonesia were the top… Lihat
2021 Microstructure and oxidation behavior of an Al–Ni–Cr–Cu–MoO3–SiO2 composite coating on low-carbon steel Agus Sukarto Wismogroho,Wahyu Bambang Widayatno,Abdul Basyir,Nono Darsono,Satrio Herbirowo,Nurul Taufiqu Rochman,Didik Aryanto,Hariyati, Pulung Karo Karo, Alfian Noviyanto In the present study, an Al–Ni–Cr–Cu–MoO3–SiO2 composite coating with varying elemental compositions was deposited using the mechanical alloying technique. The composite coating structure before and after an oxidation test was studied using X-ray diffraction (XRD), three-dimensional optical microscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). A cyclic oxidation test was conducted in an 800 °C air atmosphere for 10 cycles (200 h). Based on the XRD, SEM, and EDX analyses, the coating comprised composite-refined Al, Ni, Cr, and Cu particles as well as coarse SiO2 particles. The composite coating had a thickness in the range of 36–59 μm,… Lihat
2021 Persistence of Carbaryl Pesticide in Environment Using System Dynamics Model Carbaryl, one of the carbamate insecticides are used extensively for pest control in agriculture. The chemical is highly valued for its rapid action and relatively short environmental persistence. Because of its widespread and intensive use, residues of carbaryl have the potential to contaminate the environment. This study aims to formulate a system dynamics model to simulate a degradation process of carbaryl. Since carbaryl was not readily volatilizing, this study only estimates the concentration and degradation of carbaryl in soil and water. The result revealed that carbaryl degraded rapidly, with a half-life of 7 days in soil and two days in… Lihat
2021 The influence of coffee cherry fermentation on the properties of Cascara arabica from Subang, West Java Dewi Desnilasari,Mirwan Ardiansyah Karim,Enny Sholichah,Ranto Jambi Subekti; Bambang Purwono Cascara is an infusion beverage of dried coffee cherry pulp prepared from a by-product of coffee production. Cherry of arabica coffee was fermented with spontaneous fermentation, Lactobacillus plantarum and yeast (Saccharomyces cerevisiae) at room temperature for 24 hrs. The properties of cascara including total phenolic, flavonoid, and caffeine contents, antioxidant activity, colour, and sensory acceptance were evaluated. Results showed that cascara from L. plantarum fermentation (Y) exhibited the highest polyphenols and caffeine contents of 46.78 ppm and 52.8 ppm, respectively. Cascara from spontaneous fermentation (X) resulted the highest flavonoids content and antioxidant activity of 0.28 ppm and 89.52%, respectively. The… Lihat
2021 Endophytic bacteria diversity from Zingiberaceae and anticandidal characterization produced by Pseudomonas helmanticensis Atit Kanti,I Made Sudiana,Masrukhin,Toga Pangihotan Napitupulu,Ismu Purnaningsih,Tri Ratna Sulistiyani,Agus Budiyanto Endophytic microbes are sources for the novel antibiotic. We isolated endophytic bacteria from Zingiberaceae collected from West Sulawesi, Indonesia, and investigated their anticandidal activity. Molecular identification of the isolates was done using 16S rRNA gene sequence analysis. The antimicrobial activity was tested against four bacteria and one yeast. The anticandidal compound of selected bacteria was extracted using three different solvents (chloroform, ethyl acetate, and methanol), and each fraction was tested for their anticandidal activity. Anticandidal minimum inhibitory concentration (MIC) was determined with concentration ranging from 300 to 18.75 μg/mL, and the morphology of the Candida cells after treatment was confirmed… Lihat