Judul: Analisis Keragaman Genetik Plasma Nutfah Kelapa sawit (Elaeis guineensis Jacq.) asal Angola menggunakan Marka Mikrosatelit
Abstrak: The effort to increase productivity and other elite characters of Indonesia oil palm breeding program is facing a problem because of the narrow of genetic diversity. To widen the genetic diversity, germplasm exploration has been done in Angola, Central Africa. The objectives of this research is to assess the genetic diversity of oil palm Angola-originated between accessions and spatial distribution regions compared to the commercial population of Tenera (D x P), Dura (D) and Pisifera (P) based on microsatellite markers. The Angola-originated plant materials used were 27 accessions consist of 136 palm planted in Palapa Estate Riau, Sumatera. And commercial population plant materials used were 34 palms (25 progenies) consist of 20 palms (14 progenies of D palm), 4 palms (1 progeny of P palm and 10 palms (10 progenies) of D x P palms planted in Kandista and Damimas Estate, Riau, Sumatera. DNA has been isolated and amplified using PCR based on 20 SSR markers. Data analysis has been done using GenAlEx 6.5 software to analyze allelic diversities, Analysis of Molecular Variance (AMOVA), Genetic diversity coefficient (Gst), and the individuals spread in the populations using Principal Coordinates Analysis (PCoA). Power Marker V 3.15 software has been used to analyze the level of loci polymorphism (PIC); and NTSYS ver. 2.1 has been used to analyze the genetic relationship based on Unweighted Pair Group Method with Arithmetic Mean (UPGMA). All the analysis has been used either on individual in all populations, between populations or between subpopulations based on spatial distribution region in Angola. The result shows that the PIC value is 0.55 with 107 total numbers of alleles. Genetic diversity coefficient between spatial distribution regions is range from 0.01 to 0.13. AMOVA shows that the sources of highest diversity is given by diversities between individuals either in the subpopulations or based on spatial distribution regions. UPGMA grouping analysis has dividing all individuals into six groups on 0.42 to 0.96 similarity coefficient. The grouping of individuals is not based on the accessions and spatial distribution regions. The individuals spread analysis shows that a part of individuals tend to spread on four quadrants and part of them tend to agglomerate only on two quadrants. The D x P, D and P individuals tend to separate from the Angola-originated individuals. The Angola-originated population has all the genetic diversities parameter values compared to the commercial population D x P, D and P. The Angola-originated population has the potencies to be selected as a parent material on the current oil palm breeding program scheme.
Keyword: AMOVA, distribusi spasial, kesamaan genetik, populasi komersial

Judul: Analisis Keragaman Genetik Kelapa Sawit (Elaeis guineensis Jacq) Asal Jawa Barat Dengan Penanda RAPD (Random Amplified Polymorphic DNA)
Abstrak: Genetic diversity study is the way to clustering an individual in a population for various prospect such as plant improvement. Oil palm (Elaeis guineensis Jacq) in this research are a population of oil palm that still exist since Holland colony and estimate have resistances to Ganoderma sp. Genotype information from those were conducted by RAPD. This research aims to clustering 58 oil palm trees by RAPD method. The research consist of four stages that begin from DNA isolation, DNA amplification, genetic similarity analysis, and construction of phylogenetic tree by UPGMA (Unweighted Pair Group Method Arithmatic Mean) method in NTSYS. The result of DNA isolation were showed good band and 12000 bp in size. The DNA amplification with 20 random primer were resulted 1870 DNA band from 229 locus. About 95% among of them are polymorphic band. Similarity analysis was showed the genetic similarity coeficient value about 69% - 95%. The clustering at genetic similarity coeficient value 76% was divided the population into two big group. The increasing of genetic similarity coeficient value will be obtained more cluster. This genotype information can be used as references in oil palm improvement program
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Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition