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INDONESIA
Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology
ISSN : 20895690     EISSN : 24069272     DOI : -
Squalen publishes original and innovative research to provide readers with the latest research, knowledge, emerging technologies, postharvest, processing and preservation, food safety and environment, biotechnology and bio-discovery of marine and fisheries. The key focus of the research should be on marine and fishery and the manuscript should include a fundamental discussion of the research findings and their significance. Manuscripts that simply report data without providing a detailed interpretation of the results are unlikely to be accepted for publication in the journal.
Arjuna Subject : -
Articles 5 Documents
Search results for , issue "Vol 7, No 3 (2012): December 2012" : 5 Documents clear
STUDY ON THE EFFECT OF POLLUTANTS ON THE PRODUCTION OF AAPTAMINES AND THE CYTOTOXICITY OF CRUDE EXTRACT FROM Aaptos suberitoides Dewi, Ariyanti Suhita; Hadi, Tri Aryono; Januar, Hedi Indra; Pratitis, Asri; Chasanah, Ekowati
Squalen, Buletin Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 7, No 3 (2012): December 2012
Publisher : Research and Development Center for Marine and Fisheries Product Processing and Biotechnol

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/squalen.v7i3.4

Abstract

This experiment was conducted to study the effects of anthropogenic stressor on the spatialvariability of secondary metabolites from marine sponge Aaptos suberitoides. Samplings wereconducted at 7 sites in Marine National Park of Thousand Islands that are extended within 30 kmoff Jakarta bay on late February 2011. Sponges were collected and quantified by means of liquidchromatography coupled with photo-diode array detection, whereas, cytotoxicity of sponges extractswas determined against T47D (breast) cancer cell lines. Results showed that the spatialproduction of aaptamine and isoaaptamine did not correlate with the quality of their surroundinghabitat, despite nitrite and nitrate levels significantly affected the bioactivity of crude extracts.
SCREENING OF THERMOSTABLE PROTEASE PRODUCING MICROORGANISMS ISOLATED FROM INDONESIAN HOTSPRING Dewi Seswita Zilda; Eni Harmayani; Jaka Widada; Widya Asmara; Hari Eko Irianto; Gintung Patantis; Yusro Nuri Fawzya
Squalen, Buletin Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 7, No 3 (2012): December 2012
Publisher : Research and Development Center for Marine and Fisheries Product Processing and Biotechnol

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/squalen.v7i3.5

Abstract

Although many proteases had been studied and characterized, only a few of them are commercially available.  Protease thermostability is one of the crucial properties for industrialapplication. This research aimed to isolate and to screen the potential isolate which produce thermostable protease. There were 6 isolates (BII-1, BII-2, BII-3, BII-4, BII-6 and LII), isolated using solid Minimal Synthetic Medium (MSM) supplemented with 1.5% skim milk, that have, protease activity. Based on the 16S-rRNA gene sequencing analysis, isolates BII-1, BII-2 and BII- 6 were identified as Bacillus licheniformis, isolates BII-3 and BII-4 were identified as Bacillus subtilis, while isolate LII was identified as Brevibacillus thermoruber. Three isolates (BII-6, BII-4 and LII) were then further investigated for the second screening step using liquid MSM supplemented with 1% skim milk. The isolates (BII-6, BII-4 and LII) optimally produced protease when they were cultivated at 35, 30 and 50o C respectively after 22 h of incubation. Protease produced by BII-6, BII-4 and LII had optimum temperature  of 65, 60 and 85o C, optimum pH at 7-8, 8 and 9 and stable up to 100 min at 55, 60 and 75o C respectively.
SCREENING AND CHARACTERIZATION OF L-GLUTAMINASE PRODUCED BY BACTERIA ISOLATED FROM SANGIHE TALAUD SEA Ekowati Chasanah; Usman Sumo Friend Tambunan; Tanti Yulianti
Squalen, Buletin Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 7, No 3 (2012): December 2012
Publisher : Research and Development Center for Marine and Fisheries Product Processing and Biotechnol

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/squalen.v7i3.6

Abstract

L-glutaminase (L-glutamine amidohydrolase, EC 3.5.1.2) is a very important enzyme due to its role as flavor enhancer and antileukemic agent. Salt-tolerant L-glutaminase produced bymarine bacteria is favorable in food industries. This study describes the screening of L- glutaminase producing marine bacteria from Sangihe-Talaud Sea, North Sulawesi, Indonesia.Screening of L-glutaminase was performed using a liquid medium and identification of selected isolate was  performed using molecular-based 16S rDNA. Results showed that there were 7 isolates produced positive results of L-glutaminase, and one of them (II.1 isolate) produced the highest activity, i.e 147.99 U/L, equivalent to the specific activity of 62.32 U/mg. The isolate then selected for further study. Bacterial identification based on 16S rRNA sequencing has revealed that the isolate was 96% similar to Pseudomonas aeruginosa strain CG-T8. Characterization of extracellular L-glutaminase from the II.1 isolate showed that the enzyme worked optimally at temperature  of 37-45 °C and pH 7. The enzyme was stable when NaCl solution was added up to 8% and  began to decrease on addition of NaCl solution of 16% and 20% with relative activity of 79% and 74%, respectively. The effect of metal ions, e.g Mn2+, Mg2+, and Co2+ in the form of chloride salt, were able to increase enzyme activity, whereas the addition of other metal ions (Zn2+, Fe3+, and Ca2+) decreased the activity. The molecular weights of L-glutaminase was estimated around42 kDa and 145 kDa.
EFFECT OF CHOPPING STEP AND DRYING TECHNIQUE ON THE QUALITY OF ALKALI TREATED COTTONII (ATC) Singgih Wibowo; Muhamad Darmawan; Arif Rahman Hakim; Seruni Marsella
Squalen, Buletin Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 7, No 3 (2012): December 2012
Publisher : Research and Development Center for Marine and Fisheries Product Processing and Biotechnol

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/squalen.v7i3.7

Abstract

A research related to the production of  alkali treated cottonii (ATC) had been carried out in order to study the effect of chopping step and drying techniques on the quality of ATC produced. Four treatments were applied in the experiment, namely was copping before sun drying (treatment A); chopping after sun drying (B); chopping before mechanical drying (C); and chopping after mechanical drying (D). The quality parameters of ATC measured were gel strength, moisture content, viscosity, yield, and whiteness. The results showed that the quality of ATC was significantly affected by chopping step and drying technique, especially in ATC gel strength, viscosity and yield. However, the effect of chopping step and drying technique was insignificant to ATC moisture content and whiteness. Chopping seaweed before drying resulted in higher gel strength of the ATC but lower in yield, while chopping after drying tended to result in lower gel strength but higher viscosity and yield.
FUCOIDAN FROM BROWN SEAWEED AND ITS BIOACTIVITY Ellya Sinurat; Endar Marraskuranto
Squalen, Buletin Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 7, No 3 (2012): December 2012
Publisher : Research and Development Center for Marine and Fisheries Product Processing and Biotechnol

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/squalen.v7i3.8

Abstract

Fucoidan is a polysaccharide which  substantially consists of L-fucosa and ester sulphate group and is mainly contained in brown seaweed. For the past ten years, bioactivity studies of fucoidan has been conducted. Recently, fucoidan has been examined for its application in drugs. In a couple of years, fucoidan structure was succesfully identified and its bioactivity was revealed. Fucoidan exhibits various bioactivities such as anticoagulant, antioxidant, anticomplementary, anti-inflamation, gastric protector, and blood lipid level control. This review gives some brief progress in isolation and bioactivity study of fucoidan from brown seaweeds.

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