Judul: Pengujian Kualitas Oksidasi Primer dan Sekunder Minyak ikan Komersial Produk Dalam Negeri dan Impor
Abstrak: Fish oils in Indonesian market come from domestic and import in capsule form. The purpose of this study was to analyze the fatty acid content, the primary and secondary oxidations of fish oil in domestic and import product, and to compare its quality. The highest FFA in import fish oil was type B (1,56 ± 0.01) and the lowest was type D (0,72 ± 0,07). The result of peroxide value, anisidin value, and the total oxide value of import fish oil had a lower value than domestic one. The highest peroxide value in import fish oil was type C (19,91 ± 0,71) and the lowest was type A (9.53 ± 0.95). The highest anisidin value in import fish oil was D (6,37 ± 0,25) and the lowest found in type B (2.00 ± 2.5). The highest total oxidation of import fish oil was C (46,93 ± 9,07) and the lowest was A (27,54 ± 9,41). Import fish oil contained more fatty acids compared than the domestic fish oil.
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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: Mathematical model of Hematopoietic Stem Cell in Chronic Myelogenous Leukemia with and without Therapy
Abstrak: Leukemia or blood cancer is a diverse group of neoplastic disease, characterized by the multiplication of abnormal leukocytes or malignant transformation of blood-forming cells in bone marrow and lymphoid tissues. One of the most common types of leukemia is Chronic Myelogenous Leukemia (CML), which is usually diagnosed by the presence of certain chromosomal abnormalities, the so-called Philadelphia chromosome (Ph). One of the treatments of CML is Granulocyte Colony-Stimulating Factor (G-CSF). In this paper, we discuss two Hematopoietic Stem Cell (HSC) models, i.e. HSC without treatment and HSC with G-CSF treatment. The model of HSC without treatment included three equations representing the dynamics of HSC, leukocyte and platelet. Whereas, the model of HSC with G-CSF treatment includes the previous three equations and adds two more equations representing G-CSF injection and G-CSF circulation. The stability behavior of the system approaching the equilibrium points in the simulation study is carried out using Mathematica 7.0. The simulation results show that the G-CSF treatment can successfully decrease the number of HSC, which means reducing the CML.
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