Judul: Variability and inheritance of isozyme patterns and analyses of oil, fatty acid composition, and protein contents of coconuts palms
Abstrak: Coconut germplasm collection are important source of genetic material for coconut breeding programs. Genetic variability of those germplasm have not been studied throuhly. This study was conducted to analyse variability and inheritance of isozyme banding patterns, oil, fatty acid composition, and protein contents of coconuts. Eighty five coconut populations from mapanget (North Sulawesi), Bone-bone (South Sulawesi), and Pakuwon (West Java) experimental stations were used for isozyme banding pattern analyses.
Keyword: 

Judul: Keragaman genetik kelapa genjah jombang berdasarkan  penanda RAPD (Random Amplified PoIymorphic DNA)
Abstrak: Information of genetic diversity in coconut (Cocos nucifera L.) is necessary to support the breeding programs and germplasm conservation efforts. RAPD is molecular marker can provide to enhance the efficiency of early selection for time consuming of coconut breeding. The objective of this research was to study the genetic diversity of Jombang dwarf coconut populations grown at Pakuwon and Mapanget Coconut Research Station (BALITKA) and at Jombang, and to identify RAPD markers of Genjah Merah Jombang (GMJ), Genjah Kuning Jombang (GKJ), Genjah Hijau Jombang (GHJ), and Genjah Coklat Jombang (GCJ) populations. DNA was amplified using Polymerase Chain Reaction (PCR) and ten random decamer primers. 92% of RAPD markers were polymorphic. Genetic diversity of coconut population in BALITKA was higher than that in Jombang. Genetic diversity within GMJ, GKJ, GHJ, and GCJ populations was 15, 15, 19, and 16% respectively, but among populations was 20%. 750 bp band has been identified from DNA bulk of GCJ coconut using OPA 18 primer. This DNA fragment need to be analyzed further whether could be used as spesific marker for GCJ coconut population.
Keyword: 

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