Judul: Studi Kondisi Vegetasi dan Kondisi Fisik Kawasan Pesisir serta Upaya Konservasi di Nanggroe Aceh Darussalam
Abstrak: Studi ini bertujuan untuk menerangkan jenis-jenis tumbuhan dan keragaman vegetasi pelindung kawasan pesisir, kondisi fisik lingkungan pesisir serta memetakan kembali kawasan pelindung lingkungan pesisir untuk mendukung upaya konservasi. Penelitian ini menggunakan metode Kuadrat dan metode Survey. Kelompok herba yang terdapat di pantai Aceh Barat terdiri atas 17 jenis, indeks nilai penting tertinggi Ipomoea pescaprae (73.04%), indeks keragaman (H=2.31). Kelompok semai terdiri atas 5 jenis. Pandanus tectorius mempunyai indeks nilai penting tertinggi (226.49%), indeks keragaman (H=0.88). Kelompok pancang terdiri atas 5 jenis, Casuarina equisetifolia mempunyai indeks nilai penting tertinggi (106.94%), indeks keragaman (H=1.48). Kelompok pohon terdiri atas 9 jenis. Indeks nilai penting tertinggi Cocos nucifera (140.56%), indeks keragaman (H=1.58). Mangrove yang terdapat di kawasan pesisir Pantai Barat terdiri atas 5 jenis, Rizophora mucronata mempunyai indeks nilai penting tertinggi (174.61%), indeks keragaman (H=1.23), kerapatan individu 47 individu / hektar. Kelompok pohon yang terdapat di mangrove kawasan pesisir Pantai Timur (Pidie) terdiri atas 9 jenis, Rhizophora mucronata mempunyai indeks nilai penting tertinggi (118.62 %). Kerapatan individu 118 individu / hektar, indeks keragaman (H=1.67). Kelompok pancang yang terdapat di mangrove kawasan Pantai Timur terdiri atas 10 jenis, Rhizophora mucronata mempunyai indeks nilai penting tertinggi (138.28 %). Kerapatan individu 633 individu / hektar, indeks keragaman (H=1.78). Kelompok semai terdiri atas 10 jenis Rhizophora mucronata mempunyai indeks nilai penting tertinggi (50.92%), kerapatan individu 4925 individu / hektar indeks keragaman (H=2.13). kawasan pesisir Pantai Barat mengalami abrasi dan tingkat kerusakan kawasan pesisir yang lebih berat dibandingkan dengan kawasan pesisir Pantai Timur. Formasi vegetasi pelindung kawasan pesisir harus ditanami kembali dan penilaian yang tepat untuk membangun pelindung fisik di kawasan pesisir.
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Judul: Struktur Vegetasi dan Mintakat Hutan Mangrove di Kuala Bayeun Kabupaten Aceh Timur Provinsi Nanggroe Aceh Darussalam
Abstrak: Width of mangrove forest in Indonesia is 4.250.000 ha, it has spread in some regions in Indonesia and giving great advantages for humans life (Soerianegara and Kusmana, 1993). One of the spreading location of mangrove forest is in Kuala Bayeun, East Aceh. Increasingly the number of population in Indonesia make some threatened to mangrove forest become larger. To prevent a confusion and clash of interests in using mangrove forest, we needed some informations about potentions and functions of mangrove forest. Among of the factors that influenced the policy about mangrove forest management is information details about zonation structure condition and their vegetation compositions the aims of the research are to identify zonation structure of mangrove forest and to know the composition and their structure of vegetations for each zonations. The method to collecting data was done using vegetations analysis. To analyzing data using important value index, variety index, species distribution, canopy profile and standing potention. Monitoring do to 3 growth levels (tree, stake and seedling) with 3 times repeating to each zonations. In Kuala Bayeun East Aceh, it have four zonations of mangrove forest, there are zonation I with 40 – 60 meters width, zonation II with 140 – 170 meters width, zonation III with 50 – 70 meters width, and zonation IV with 60 – 80 meters width. Total variety of mangrove plants were found in four zonations is 23 varieties, specify zonation I, mangrove plant which have dominated in growth, stake and seedling level is Avicennia marina with each the important value index are 115,69%, 136,36% and 72,47%. Mangrove variety index in tree level is 1,297; stake level is 1,274 and seedling level is 1,202. In zonation II, mangrove plant which have dominated in growth, stake and seedling level is Rhizophora apiculata, with each important value index are 127,55%, 145,09% and 93,51%. Variety index of mangrove in growth, stake and seedling continuously are 1,495; 1,476; and 1,353. In zonation III, mangrove plant which have dominated in growth, stake and seedling level is Ceriops decandra, with each important value index are 146,36%, 99,48% and 54,93%. Variety index of mangrove in growth, stake and seedling continuously are 1,594; 1,942 and 1,704. Zonation IV, mangrove plant which have dominated in growth, stake and seedling level is Xylocarpus granatum, with each important value index are 149,06%, 105,15% and 77,31%. Variety index of mangrove in growth, stake and seedling continuously are 0,881; 1,605 and 1,209. Vegetation structure in fourth zonation has one strata, it is stratum C.
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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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