Judul: Penentuan Tingkat Kematangan Buah Durian (Durio zibethinus Murray) Varietas Sriwig Dengan Metoda Getaran Suara
Abstrak: Seiring dengan pertumbuhan jumlah penduduk, perkembangan ekonomi dan peningkatnya pengetahuan masyarakat tentang pentingnya gizi dan kesehatan, menyebabkan meningkatnya permintaan produk hortikultura.Diantara komoditas buah-buahan durian memiliki prospek pengembangan yang cukup baik di Indonesia. Selain itu, pada perdagangan dunia, produksi komersial durian terkonsentrasi di tiga negara, yaitu Thailand, Malaysia clan Indonesia. Ketiga negara produsen ini mengekspor durian ke perdagangan dunia. Pasar perdagangan durian di Asia mampu menguasai 99 pcrsen dari perdagangan durian tdi dunia. beberapa negara importir dari perdagangan durian di dunia ; 1 ) Singapura mengimpor durian sebesar 65 persen, 2) Hongkong mengimpor durian sebesar 20 persen, dan 3) Taiwan mengimpor durian sebesar 15 persen. Tujuan penelitian ini secara umum adalah untuk mengkaji penerapan metoda gelombang suara dalam menentukan tingkat kematangan buah durian. Sedang tujuan secara rinci meliputi, 1 ) merancang sistem pengukuran gelonlbang suara untuk menentukan tingkat kematangan buah durian, 2) menentukan frekuensi resonansi untuk mendeteksi kematangan buah durian berdasarkan ulnur petik dan ketukan pada buah, dan 3) menenlukan hubungan frekuensi resonansi dengan parameter muht lain seperti kadar gula terlarut, kekcrasan daging buah, dan uji organoleptik.
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Judul: Development of empirical model for non-destructive determination of maturity and ripeness of prime quality durian with ultra sonic
Abstrak: Durian (Durio zibethinus Mun) is one of the exotic tropical fruits in Indonesia having a high economic value. Determining the maturity and ripeness of durian non-destructively is a serious problem in selecting durian. Consequently, a non-destructive method for determinating of maturity and ripeness of the durian pulp is a real need. The objective of this research was to determine the maturity and ripeness of durian, non-destructively, through its acoustic characteristics. In achieving such objective, the research is divided into several specific objectives, i.e. (1) to determine the physical characteristics and the criteria of immature and mature durians; (2) to determine the acoustic characteristics of immature and mature durians; (3) to determine the impacts of artificial ripening on the acoustic characteristics of durian; (4) to determine the acceptability of consumer on the artificial and natural ripened durian; (5) to determine the acoustic characteristics of the fruit components; and (6) to develop the empirical model for determination the maturity and ripeness of durian. The material used in the research was a prime quality durian of Sunan cultivars, originated from the durian estate of Bernard Sadhani at Cianjur District, West Java.
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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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