Judul: Penggunaan Giberelin dalam Pembibitan Tiga Jenis Pisang (Musa paradisiaca L.)
Abstrak: High demand of bananas pushes bananas producer for making bananas buds growth faster. One way to achieve that goal was using gibberellin. The aim of this research was to obtain the best banana which growth faster with addition of certain concentration of gibberellin and to obtain the best gibberellin concentrations that accelerate the seedling of three kinds of bananas. Banana used in this research were Ambon, Kepok and Rajabulu. The gibberellin concentrations induced were 0 ppm, 10 ppm, 100 ppm, and 500 ppm. The research compiled randomized complete block design using two factors with four repetition. The observed variables were buds length, number of buds, time of buds emerges, time for maturing buds, number of matured buds, and the percentage of buds live. Gibberellin concentrations didn’t influence the accelerate growth of buds. Among the three kinds of bananas, the fastest buds growth was Ambon banana. The growth of buds was better without gibberellin induction.
Keyword: growth, seedling, gibberellin, banana

Judul: Penggunaan Giberelin dalam Pembibitan Tiga Jenis Pisang (Musa paradisiaca L.)
Abstrak: Permintaan yang besar terhadap buah pisang mendorong produsen pisang untuk mempercepat pertumbuhan tunas pisang. Salah satu caranya adalah menggunakan giberelin. Tujuan penelitian ini adalah mendapatkan tunas pisang terbaik dengan penambahan giberelin pada konsentrasi tertentu dan mendapatkan konsentrasi giberelin terbaik untuk mempercepat pertumbuhan tunas pada ketiga jenis tanaman pisang. Jenis pisang yang digunakan yaitu Ambon, Kepok dan Rajabulu. Empat taraf perlakuan konsentrasi pemberian giberelin yaitu 0 ppm, 10 ppm, 100 ppm, dan 500 ppm. Penelitian disusun dalam rancangan acak kelompok lengkap teracak (RKLT) dua faktor dengan empat ulangan. Peubah yang diamati adalah waktu munculnya tunas, tinggi tunas, jumlah tunas, waktu muncul tunas hingga siap panen, tunas siap panen, dan persentase tunas hidup. Di antara ketiga jenis pisang, pertumbuhan tercepat dari keseluruhan pengamatan adalah pisang Ambon. Pertumbuhan tunas lebih baik tanpa penambahan giberelin
Keyword: banana, gibberellin, seedling, growth

Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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