Judul: Keragaman Genetik Kerabat Rambutan Liar (Nephelium spp.) di Kabupaten Sanggau, Kalimantan Barat berdasarkan Marka SSR dan ISSR.
Abstrak: Wild rambutans (Nephelium spp.) are members of Sapindaceae that produce edible fruit. This study aimed to determine the genetic diversity of wild rambutan from district Sanggau, West Kalimantan based on SSR and ISSR markers. Plant materials were colected from five subdistricts, Bonti, Jangkang, Parindu, Mukok and Kapuas, district Sanggau, West Kalimantan. There were four species and five varieties of wild rambutans in West Kalimantan, namely N. cuspidatum, N. lappaceum, N. rubescens, and N. uncinatum. The genetic diversity of wild rambutans in West Kalimantan is high. The highest genetic diversity based on SSR markers was found in Jangkang (He=0,27) and the highest genetic diversity based on ISSR was found in Bonti (He=0,18). Cluster analysis using Simple Matching (SM) index and UPGMA method based on SSR and ISSR showed that there were high similarity among species of wild rambutans in district Sanggau, West Kalimantan with similarity index ranged 0,5 – 1,0.
Keyword: Bogor Agricultural University (IPB), wild rambutan, SSR, Nephelium, ISSR, Genetic diversity

Judul: Keragaman Genetik Kapulasan (Nephelium Ramboutan-Ake) Di Kabupaten Sukabumi Dan Ciamis Berdasarkan Marka Ssr Dan Issr
Abstrak: Kapulasan (Nephelium ramboutan-ake (Labill.) Leenh) adalah kerabat dekat rambutan (N. lappaceum L.). Kedua spesies menghasilkan buah yang hampir sama, tetapi buah kapulasan memiliki kulit buah keras dan tebal serta tidak memiliki rambut. Penelitian ini bertujuan menggambarkan keragaman genetik kapulasan di Kabupaten Sukabumi dan Ciamis dengan menggunakan marka SSR dan ISSR. Sebanyak 27 individu kapulasan ditemukan dari tiga lokasi yaitu di Kecamatan Cibadak, Cijeungjing (Sukabumi) dan Kecamatan Ciamis (Ciamis). DNA dari semua individu yang ditemukan berhasil diamplifikasi dengan dua pasang primer SSR yaitu LMLY6 dan LMLY12, dan dua primer ISSR, ISSR 1 dan ISSR 3. Kapulasan mempunyai tingkat polimorfisme yang tinggi pada keempat primer yang diuji, 88.88% dari primer LMLY6, 96.29% dari primer LMLY12, 92.59% dari primer ISSR 1 dan 88.88% dari primer ISSR 3. Nilai persentase lokus polimorfik tertinggi menggunakan marka SSR adalah pada Kecamatan Ciamis yaitu 62.50% dan terendah pada Kecamatan Cibadak yaitu 37.50% serta menggunakan marka ISSR terbesar pada Kecamatan Cibadak yaitu 84.21% dan terendah pada Kecamatan Ciamis yaitu 47.37%. Analisis gerombol berdasarkan data SSR dan ISSR menggunakan indeks similaritas simple maching dan metode UPGMA mengelompokkan semua individu kapulasan dalam dua kelompok utama, tetapi individu dari lokasi berbeda mengelompok bersama. Tingkat keragaman genetik dalam populasi jauh lebih besar dibandingkan dengan keragaman antar populasi. Hasil ini mengindikasikan bahwa tanaman kapulasan adalah tanaman menyerbuk silang.
Keyword: Nephelium ramboutan-ake, SSR, ISSR, keragaman genetik

Judul: Adsorption of Cu(II) using synthetic Zeolite from coal fly ash
Abstrak: Fly ash and synthetic zeolite synthesized from coal fly ash had been used to investigate the adsorption of Cu2+ synthetic solution. Optimation studies of adsorption process was performed batch system in central composite design with three parameters, pH, contact time, and concentration of adsorbent. The optimum condition for adsorption process for fly ash and synthetic zeolite were found at pH 5.5 and 4, contact time 83 and 58 minutes, and adsorbent concentration at 150 and 90 mg/50 mL solution respectively. The Langmuir and Freundlich isotherm models were applied. The Langmuir models fits best the equilibrium isotherm data. The optimum fly ash and zeolite synthetic adsorption capacities were 4,11 mg/g and 60,97 mg/g respectively. The kinetics data were tested using a pseudo first-order and a pseudo second-order Lagergren equation. Kinetics data correlated well with the pseudo second-order kinetics model. Thermodinamic study indicated that adsorption process was spontaneous and accompanied by an increase in entropy and decrease in Gibbs energy. The decreasing of adsorption capacity of Cu(II) by both fly ash and synthetics zeolite were influenced by the coexisting ions Pb(II) or Mn(II), although there were increasing of the total adsorption capacity.
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