Judul: Multiplikasi in vitro Tanaman Pisang Kepok Merah (Musa paradisiaca cv. Kepok Merah)
Abstrak: Kepok merah is one of the cooking bananas having yellow redish mesocarp. Kepok merah has a specific benefit as baby food besides breast fed. The major problem in developing this plantain is the lack of plant seedlings. In vitro multiplication was considered as a technique to solve the problem. This research was aimed to select the best media for the multiplication of plantain kepok merah. Two steps of work have been done which were sterilization method and then treatments in the initiation and multiplication media. Sterilization 1 used consecutively substances Bayclin 20%, Bayclin 30%, Agrept, Dithane M-45, and alcohol 70% while sterilization 2 used Bayclin 5%, Bayclin 15%, and alcohol 70%. Two basic media (modified MS and WP) were used, enriched with 0.2 mg/L IAA and two levels of BAP (3 and 5 mg/L). Method 1 of sterilization was better than method 2. BAP at 5 mg/L in both basic media produced noduls on the explants, but further development was more promoted by WP.
Keyword: WP medium., plantain kepok merah, multiplication, modificated MS medium

Judul: Mikropropagasi Pisang Kepok Merah (Musa paradisiaca) : Pengaruh Media dan Zat Pengatur Tumbuh
Abstrak: Kepok merah has fairly high commercial value as an ingredient in the manufacture of banana chips industry. Kepok merah contains vitamin B complex that is important for energy production and the formation of brain cells in infants. Commercial development of kepok merah can be supported by tissue culture technique. The purpose of this study was to determine which media as well as growth regulators and concentrations is the most favorable for shoot multiplication and root formation in kepok merah. Shoot multiplication used four treatments namely: basic Murashige and Skoog medium (MS) and Woody Plant (WP), each of these media was enriched with 0.5 ppm IAA and two levels of BAP (5 and 7 ppm). Rooting stage used four of treatments : MS with NAA 1 ppm or IBA 1 ppm, and WP with NAA 1 ppm or IBA 1 ppm. Results of the experiment showed that MS medium with 0.5 ppm IAA in combination with 5 ppm BAP produce 6 – 17 buds on each explants and gave better growth for its shoots. Planlet in media MS with NAA 1 ppm produce 3 – 16 roots better than that in MS with IBA 1 ppm.
Keyword: Bogor Agricultural University (IPB), growth regulating substances., multiplication, plantain kepok merah

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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