Judul: Systematic Review: History of Distribution and Conservation of Family Dipterocarpaceae through Vegetatif Propagation
Abstrak: Dipterocarpaceae mendominasi tumbuhan hutan tropis dan hasil kayunya diekploitasi hingga tergolong tumbuhan langka. Upaya konservasi melalui perbanyakan generatif memiliki berbagai hambatan sehingga dipilih perbanyakan vegetatif sebagai alternatif. Penelitian ini memiliki dua tujuan yaitu mengetahui sejarah sebaran tanaman Dipterocarpaceae dan sampai sejauh mana perkembangan teknik-teknik perbanyakan vegetatif yang telah diterapkan pada spesies Dipterocarpaceae. Penelitian dilakukan menggunakan metode systematic review. Teknik perbanyakan vegetatif yang umum digunakan yaitu stek dan kultur in vitro, teknik vegetatif lainnya belum diterapkan. Penelitian perbanyakan vegetatif Upuna dan Parashorea belum ditemukan publikasinya. Teknik stek paling banyak diterapkan dan cukup efektif untuk perbanyakan beberapa spesies Dipterocarpaceae. Teknik kultur in vitro baru diterapkan pada beberapa genus dan perlu penelitian lebih lanjut.
Keyword: conservation, dipterocarpaceae, rare tree, systematic review, vegetative propagation

Judul: Evaluasi Pertumbuhan Beberapa Jenis Dipterokarpa di Areal Revegetasi PT. Kitadin, Kalimantan Timur
Abstrak: The existence of dipterocarp species is very important especially in lowland tropical rain forest. Dipterocarp species have high economic and ecological values. Borneo is one of the region dipterocarp species. Logging has resulted in the decrease of dipterocarp species, moreover, mining industry has worsen this condition. According to IUCN (International Union for Conservation of Nature), that these kinds of plants have been categorized endangered. PT Kiadin in collaboration with Research Center of Dipterocarp Samarinda performed planting trials of various dipterocarp. The experiment was carried out in 2009 in the area of pre-conditioned post-mining area. The planting was done in five locations that had previously been planted with pioneer tree species in which each location had different types of shading. In order to know which dipterocarp species that is the most superior and in which locations these species existed, the growth of several types of dipterocarp in post-mining landscapes of PT. Kitadin was evaluated. This study aimed to identify which types of dipterocarp species that grew the best in various locations of revegetation of PT. Kitadin. Based on the research done, there was a tendency that five dipterocarp species grow well in the shade of waru. However, precentage of these five dipterocarp species life was mostly under the shade of trembesi. Parashorea smythiesii species had greater average height, diameter, and survival rates than those of other species. Thus, this species is a potential species that could be used too planting in the ex mine siter of PT. Kitadin.
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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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