Judul: Rekayasa proses penggorengan vakum (Vacuum Frying) dan pengemasan keripik durian mentawai
Abstrak: Indonesia merupakan negara yang terletak di wilayah tropis, serta beriklim basah. Daerah seperti ini memungkinkan tumbuhnya berbagai macam tumbuhan dengan subur. Keanekaragaman jenis buah-buahan merupakan sumber genetik yang sulit ditemukan di daerah lain. Pada saat musim panen raya, harga buah menurun secara drastis dikarenakan kelebihan produksi. Hal ini tentu saja akan merugikan para petani buah tersebut, sehingga diperlukan suatu proses pengolahan pasca panen buah-buahan tersebut menjadi penganan dengan nilai jual yang lebih tinggi, salah satunya adalah produk keripik.
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Judul: Kajian rekayasa proses penggorengan hampa dan kelayakan usaha produksi keripik pisang
Abstrak: Vacuum frying is a new technology that can be used to improve quality attributes of fried food because of low temperatures process. The objectives of this study is to assess the effects of oil temperatures and exposure time of frying on physic-chemical and organoleptic properties of banana chips to get a better quality products, to determine packaging material that can extend shelf life of banana chips, to predict shelf life of banana chips using the method of acceleration and to calculate production costs and the business feasibility of vacuum fried banana chips. The quality parameters tested include water content, fat content, colour, thickness and organoleptic test. Banana chips were fried in oils with temperature of 60, 70, 80, and 90 °C and time of frying 30, 45, 60 and 75 minutes. The result showed that the temperature and frying time is significantly influence the quality and characteristics of the products. The best quality of banana chips obtained at frying temperature of 80 ˚ C for 60 minutes. Aluminum foil can maintain the shelf life of banana chips for 115 days of storage, while the PP is only for 70.6 days of storage based on water content parameter . Banana chips business eligible to run if production capacity is 4 kg or more.
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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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