Judul: Comparative Study of Fish Oil Purification from Surimi Processing Byproducts Using Bleaching and Degumming-Bleaching Methods
Abstrak: Kualitas minyak ikan merupakan suatu parameter krusial yang perlu diperhatikan untuk mendapatkan produk dengan stabilitas oksidatif yang baik. Tahapan pemurnian merupakan sebuah upaya yang dilakukan untuk mendapatkan minyak ikan dengan kualitas yang baik dan memenuhi standar baku mutu. Proses pemurnian minyak ikan hasil samping produksi surimi dilakukan dengan menerapkan proses bleaching dan kombinasi degumming-bleaching untuk mengetahui efek pemurnian terhadap kualitas minyak ikan yang dihasilkan. Hasil pemurnian dengan metode bleaching menggunakan adsorben magnesol XL konsentrasi 5% dianggap mampu memberikan hasil yang lebih baik pada sampel minyak ikan hasil ekstraksi menggunakan metode high pressure selama 5 menit. Hasil pemurnian menunjukkan bahwa parameter bilangan asam dan nilai anisidine yang dihasilkan sudah memenuhi standar baku mutu yang ditetapkan oleh CODEX 2021., Fish oil quality is a crucial parameter that must be considered to obtain a product with good oxidative stability. The purification stage is an effort to obtain high-quality fish oil that meets quality standards. The purification process of fish oil made from surimi by-product was carried out using a bleaching process and a combination of degumming-bleaching to determine the effect of purification. The results of purification with the bleaching method using 5% Magnesol XL adsorbent are considered to be able to provide better results on fish oil samples extracted using the high pressure method for 5 minutes. The purification results showed that the acid value and anisidine value parameters produced met the quality standards set by CODEX 2021.
Keyword: Degumming, purification, bleaching, fish oil

Judul: Pemucatan Minyak Ikan dari Hasil Samping Industri Penepungan Ikan Menggunakan Zeolit dan Bleaching Earth
Abstrak: Minyak ikan sebagai hasil samping industri penepungan ikan merupakan bahan yang berpotensi untuk dimanfaatkan kembali apabila mengalami proses pengolahan lebih lanjut. Hal yang dapat dilakukan adalah proses pemucatan. Studi ini bertujuan mengetahui kualitas minyak ikan sebelum dan setelah penambahan adsorben, mendapatkan informasi kondisi proses pemucatan terbaik, mengetahui pengaruh jenis dan konsentrasi terbaik dari adsorben terhadap kualitas minyak ikan, mendapatkan adsorben dan konsentrasi terbaik. Minyak ikan kasar dilakukan penimbangan dan dipanaskan. Kemudian, pada saat suhu telah mencapai 55-60 oC ditambahkan adsorben dengan berbagai konsentrasi. Minyak kemudian dipanaskan kembali dan diaduk pada suhu 80 oC selama 30 menit. Setelah itu, minyak disentrifugasi pada 6500 rpm selama 20 menit. Jenis dan adsorben terbaik untuk proses pemucatan diperoleh menggunakan adsorben zeolit dengan konsentrasi 5%. Interaksi jenis dan konsentrasi adsorben berpengaruh secara signifikan pada setiap parameter uji rendemen, densitas, viskositas, kadar asam lemak bebas, bilangan asam, bilangan peroksida, bilangan total oksidasi dan bilangan p-anisidin terhadap kualitas minyak ikan., As a by-product of the fish meal processing byproduct industry, fish oil is a material that has the potential to be reused if it undergoes further processing. What can be done is the bleaching process. This study aims to determine the quality of fish oil before and after the addition of adsorbent, obtain information on the best bleaching process conditions, determine the effect of the best type and concentration of adsorbent on the quality of fish oil, obtain the best adsorbent and concentration. Crude fish oil is weighed and heated. Then, when the temperature has reached 55- 60 oC, adsorbents with various concentrations are added. The oil was then reheated and stirred at 80 oC for 30 minutes. After that, the oil was centrifuged at 6500 rpm for 20 minutes. The best type and adsorbent for the bleaching process was obtained using zeolite adsorbent with a concentration of 5%. The interaction of adsorbent type and concentration significantly affected each test parameter of yield, density, viscosity, free fatty acid content, acid number, peroxide number, total oxidation number, and p-anisidine number on the quality of fish oil.
Keyword: fish oil, bleaching, zeolite, bleaching earth

Judul: Sistem Informasi Geografis untuk Pola Aktivitas Manusia dengan Pemodelan Data Spatio-Temporal
Abstrak: The human activity in a given time period will shape its pattern. This research develops a spatiotemporal data model to support the prediction of human existence based on activity-pattern and also visualizes the activity locations in a GIS environment. This so-called mobility oriented spatiotemporal data model conceptualizes the spatial and temporal interaction of activity behaviour using the concept of mobility. In other words, activity patterns are conceptualized as a sequence of staying at or traveling between activity locations. The model can support the analysis and queries of activities from different perspectives, i.e. queries can be time-oriented, person-oriented, activity-oriented, and location-oriented. A prototype system based on the activity data modelling is implemented in MySQL 5.0.27 as DBMS with using PhpMyAdmin 2.9.1.1 software. Spatial database is developed with using software QuantumGIS and ArcView. The system could be accessed online through a web browser with MySQL as its database storage and Pmapper framework as the tools used in visualizing the activity locations.The information were provided in the form of activity attribute-data as the user requested and graphical-data (map) which contains information about its activity locations.
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