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: Inventarisasi Kualitas Minyak Ikan Komersial (Softgel) Impor di Wilayah DKI Jakarta dan Sekitarnya
Abstrak: Permintaan minyak ikan yang semakin meningkat menjadi tantangan produsen untuk memproduksi minyak ikan yang berkualitas. Penelitian ini bertujuan menginventarisasi dan menentukan kualitas softgel minyak ikan komersial di wilayah DKI Jakarta dan sekitarnya berdasarkan standar International Fish Oil Standards (IFOS) dengan parameter uji bilangan peroksida, bilangan p-anisidin, total oksidasi, profil asam lemak, dan analisis asam lemak bebas. Hasil penelitian menunjukkan bahwa presentase asam lemak bebas, bilangan peroksida, bilangan p-anisidin, dan total oksidasi yang memenuhi standar IFOS masing-masing yaitu 90 % (19 dari 21 sampel), 29 % (6 dari 21 sampel), 90 % (19 dari 21 sampel), dan 33 % (7 dari 21 sampel). Kualitas minyak ikan komersial tidak semuanya sesuai dengan standar IFOS, hanya 19 % (5 dari 21 sampel) yang memenuhi standar IFOS. Minyak ikan terbaik dari 19 % yang memenuhi semua parameter IFOS yaitu minyak ikan sampel P dari Bogor. Minyak ikan berdasarkan kandungan omega-3, EPA, dan DHA tertinggi yaitu minyak ikan sampel U dari Jakarta dengan nilai masing-masing 74,3 %, 14,17 %, dan 59,73 %.
Keyword: asam lemak, minyak ikan, oksidasi, standar

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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