The development of inexpensive biodegradable paper-based plasmonic sensor from cheap bacterial cellulose source, nata de coco Nanofibrillation of bacterial cellulose through high pressure homogenization for surface nanopatterning Plasmonic papersheet sensor development integrating bacterial cellulose and silver nanoparticles Physical and textural improvements of bacterial cellulose structure facilitating effective localized surface plasmon effects Detection of Rhodamine 6G on the proposed bacterial cellulose-based plasmonic paper sensor
Priatni S, Ratnaningrum D, Kosasih W, Sriendah E, Srikandace Y, Rosmalina T, Pudjiraharti S. 2018. Protein and fatty acidprofile of marine fishes from Java Sea, Indonesia. Biodiversitas 19: 1737-1742. Indonesia is the second largest producer of capturefisheries products in the world and the most capture fisheries production comes from marine fisheries. Marine fish is a source of protein,amino acid, saturated and unsaturated fatty acids, which are important components of diet. The objective of the study was to investigatethe protein and fatty acids profile of nine marine fish samples from Java Sea of Indramayu West Java, Indonesia. The analysis datashowed that the total protein content of fish samples ranged from 61.07% (Pampus argenteus) to 86.56% (Tetraodontidae). Meanwhile,total lipid content of fish samples ranged from 1.73% (Tetraodontidae) to 9.82% (Leiognathus equulus). The concentration of α-AminoNitrogen (AN) of fish protein hydrolysate was ranging from 31 mM (Nemipterus hexodon) to 69 mM (Mystacoleucus padangensis)and% Degree of Hydrolysis (DH) was ranging from 9.33% to 20.39%. The molecular weight of protein fish samples had similar profilesprimarily for almost all samples, which could be observed from a typical band with the weight around 49 kDa. The saturated fatty acid(Ʃ SFA) compositions of fish species ranged from 1094.03-4233.03 μg/g. Oleic acid (MUFA) content of all fish species ranged from257.91-1216.06 μg/g. However, only three fish species contain of Poly Unsaturated Fatty Acid (PUFA) linoleic acid as the following;Selaroides leptolepis (171.36 μg/g), Oxyeleotris marmorata (249.40μg/g) and Tetraodontidae (140.35 μg/g). The highest SFA contentwas found in S. leptolepis with palmitic acid (C16:0) as the dominant saturated fatty acid (2320.88 μg/g). S. leptolepis also containedhigh oleic acid (1216.06 μg/g) and linoleic acid (171.36 μg/g).
Abstract. Bacterial cellulose-based edible films have been known as natural material for packaging containing carboxymethyl cellulose (CMC) and glycerol. Edible film is also known as an external food protection since it contains antibacterial substance. Incorporating antimicrobial compounds with essential oil (EO) from Citrus spp such as lime, lemon and sweet orange into edible films provides a novel approach to improve the safety, shelf-life of foods or fruits as well as physical properties of the edible film. The present study was aimed to investigate the antibacterial activity of edible film incorporated with EO. Antibacterial activity performance was carried out using broth and dilution agar method to determine EO role to inhibit the growth of pathogen bacteria such as Escherichia coli and Staphylococcus aureus. The results showed that edible film containing 2% lime, lemon and sweet orange performed moderate antibacterial activity with minimum inhibition concentrations (MICs) of about 100, 250 and 225 mg/mL, respectively.
Antioxidant is an interesting bioactivity since it has several correlations with disease such as Alzheimer, cancer, ageing and many others in which were promoted by free radicals. Investigation on our endophytic fungus collection namely Fennelia nivea NRRL 5504 revealed that the fermented mediumhas antioxidant property against DPPH through free radical scavenging effect. Fermentation in liquid medium i.e. Potatoes Dextrose Broth, resulted that the fermented medium reached about 86.51% (p < 0.05) of free radical inhibition on the eighth day. Results ofphytochemical screening from extracted fermentation medium showed the presence of terpenes, triterpenes, phenolic compound, tannin, flavonoid and also saponin. The highest antioxidant activity was showed by ethyl acetate extract. Calculation on total phenolic content of ethyl acetate crude extract was 0.544 mg g(-1) equivalent to pyrogallol. By exposure above, we have alternative source of antioxidant that came from our endophytic fungus collection which we isolated previously from Typhonium divaricatum Lodd.
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