Judul: Tinjauan Konservasi Kelor (Moringa oleifera Lam): Studi Kasus di Desa Cikarawang Kecamatan Dramaga Kabupaten Bogor
Abstrak: Moringa (Moringa oleifera Lam.) is a multifunction plant which is useful from the roof until the leaf for health, as food, an increasing environment quality. Research about the usefulness of moringa by Indonesian people and the existence hasn’t been done. The purpose of this research is to identify usefulness of moringa by the people and the existence of moringa in Cikarawang Bogor. This research was done in Cikarawang Bogor from May to June 2013. The data was collecting by field observation and interviewing by snowball method. Based on the result, moringa could be found at almost all hamlet in Desa Cikarawang which is had by 24 families heads or 1,14% from the totally families heads in the village. The census result showed that 65 individuals of moringa in Cikarawang which is planted in various type of habitat. The usefulness type of moringa which is done by the village people are 34 % for ritual custom, 42% for medicine, 12 % for food and 12 % for hedge of rice field.
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Judul: Kajian potensi biji kelor (Moringa oleifera) sebagai koagulan
Abstrak: Adequate access to drinking water is still a huge problem for several countries. One of the reason is the high cost for water’s chemical treatment. Hence, there is a need for low cost and locally available materials. One of the natural coagulants that can be used as an alternative for synthetic chemicals is a seed of Moringa oleifera. In this research, by using the jar test method, the optimum coagulation condition of M. oleifera seed was obtained at pH 6 with concentration of 50 mg/L and settling time of 60 minutes. The optimum condition of M.oleifera unskinned seeds as a coagulant was at pH 7 with concentration of 80 mg/L and settling time of 60 minutes. Previously, optimum coagulation conditions for aluminium chlorohydrate (ACH) has been obtained at pH 7, 10 mg/L, and 10 minutes, respectively. The optimum conditions of each coagulant gave different responses in turbidity, iron and manganese contents decrease. The average values of turbidity reduction with M. oleifera seed, unskinned seed, and ACH were 99.10, 99.07, and 99.71% respectively. The average values of iron reduction for those coagulants were 98.30, 98.45, and 9.,98%, whereas the average values of manganese reduction were 77.87, 81.08, and 78.65%, respectively. Repeatability showed as relative standard deviations on the coagulation process using three types of coagulant on the measurement of three parameters above were below 10%.
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Judul: Transisi Fasa Materi Hadronik ke Materi Kuark pada Inti Bintang Neutron.
Abstrak: Bintang neutron terdiri dari beberapa lapisan yang disusun oleh materi nuklir yang berbeda dengan kerapatan yang semakin tinggi ketika mendekati pusat bintang. Inti luar bintang neutron disusun oleh materi hadronik (nukleon, lepton, dan hyperon), sedangkan inti dalam bintang neutron disusun oleh kuark-kuark bebas (up, down, strange) yang saling berinteraksi. Tujuan penelitian ini adalah mempelajari bagaimana transisi dari inti luar ke inti dalam bintang neutron dengan menggunakan pendekatan RMF (Relativistic Mean Field) untuk materi hadronik dan CIDDM (Confined Isospin Density Dependent Mass) untuk materi kuark. Tekanan transisi diperoleh ketika potensial kimia barion materi hadronik dan materi kuark bernilai sama. Nilai tekanan transisi dengan parameter SU6-TM1 sekitar 87 MeV/fm3 dan diperoleh massa maksimum bintang neutron yaitu 1.92M dengan jari-jari sekitar 8.62 km. Nilai tekanan transisi dengan parameter SU6-G2 sekitar 53 MeV/fm3 dan massa maksimum bintang neutron yaitu 1.88M dengan jari-jari sekitar 8.16 km. Jenis transisi fasa adalah orde satu ditandai dengan diskontinuitas dalam kerapatan energi (adanya mixed phase). Parameter-parameter pada model nuklir yang digunakan menyebabkan perbedaan kekakuan persamaan keadaan (EOS) dari materi hadronik dan materi kuark sehingga nilai tekanan transisi dari fasa hadronik ke fasa kuark juga berbeda.
Keyword: bintang neutron, persamaan keadaan, transisi fasa