| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 271-281 |
| Abstraksi Narasi | : | The research of diversity of plant-parasitic nematodes in coffee (cofea robusta) grown as monocultre and multiple cropping were done at coffee plantation area at "Loka Pengkajian Teknologi Pertanian" Natar, in the south of Sumatra. He research was conducted in July until October 1977. Many samples of the soil and roots of coffee plants were collected from coffee grown aas monoculture and coffee grown as multiple cropping (coffee and pipper and vanilie; coffee-peanut-tunggak bean). the result of research indicated many genus of plant parasitic nematodes in the soil and roots of coffee grown as monoculture were more survive than that genus in coffee grown as multiple cropping. The highest of reltive dominacy of the plant parasitic nematode in coffee was pratylenchus. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 251-256 |
| Abstraksi Narasi | : | A Study on bamboos has been done in South Bukit Barisan, National Park. The generas and species were ucognized based on ecological an vegetative characters. Fif-teen species of bamboos belong ing to five generas, namely Bambusa, Dendrocalamus, Dinochloa, Gigantochloa and Schizostachyum were found. Among them, eleven species are wild and others are culsivated. This study found new-three species, namely Gigantochloa sp1, Gigantochloa sp2 and Schizostachyum sp. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 135-139 |
| Abstraksi Narasi | : | Dipterocarpaceae is an important family of plant in South East Asia. It produces many timber and dominates the tropical rain forest with its great species richness. Exploitation of Dipterocarpaceae timber damages the forest, especially in Lampung Province. According to a 1988 Citra Landsat Interpretation report, deforestation rose by 60% of 1.237.208 Ha caused extinction of Dipterocarpaceae species diversity. There are several researches could be suggested to support conservation of biodiversity of Dipterocarpaceae: (1) Inventarization, identification and distribution of Dipterocarpaceae in Lampung Province; (2) Fenology of Dipterocarpaceae plant; (3) Cultivation of generative or vegetative reproduction; (4) Utilization of mycorhyza on the Dipterocarpaceae cultivation. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 364-374 |
| Abstraksi Narasi | : | The characterization of nitrogen ion implanted tools steels (AISI H13) under various nitrogen ion dose and energy are presented in this paper. The result are, the changes of microstructure, penetration depth of the nitrogen ion, cause the changes of the composition and the microhardness of the surface layer. From the experiment, it`s found that under various ion dose from 3, 05 x 10^16 ion/cm^2 to 6, 09 x 10^19 ion/cm^2 and ion energy from 20 keV to 100 keV, the optimum hardness of the surface is about 499 KHN. The optimum hardness is achieved at the ion dose 6, 09 x 10^17 ion/cm^2 and ion energy keV. From microstructure analysis can be shown that the formation of iron nitrid layer is indicated by white layer on the analysis also can be shown that of the optimum condition of mitrogen ion concentration is about 0, 087% weight or0, 0334% atom. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 344-349 |
| Abstraksi Narasi | : | In Vitro Callus Induction on Shallots (Allium cepa L.). An experiment that goal to induce callus initiation on leaf explants of shallot has been conducted at Botany Laboratory, Department of Biology, Lampung University during June - October 1998. Young shallot leaves excised into 25 mm^2 were planted on MS medium added 2,4-dichlorophenoxy acetic acid (2,4-D) of 0, 2.5, 5.0, 7.5, 10.0, 12.5, and 15.0 myu M. Callus cultures were maintained in dark room an 25-26 degree C for a weeks. This singles factor experiment was arranged in a completely randomized design with four replicates. Successfulness of callus initiation, fresh weight of callus, and visual performance of callus were observed to four weeks after planting as responses of those 2,4-D`s treatments. Result showed that successfulness of callus initiation of explants occured on all treatments of 2,4-D (0.0-15.0 myu M). The best callus growth was observed on the MS medium with 2,4-D of 12.5 myu M, with the successfulness of callus initiation 100%, and fresh weight of callus 32.61 mg/explant. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 350-355 |
| Abstraksi Narasi | : | Mitochondrial DNA (mtDNA) was used to study variation of Clarias batrachus populations. There were 13 populations sample collected from Jawa, Sumatra, Kalimantan (Indonesian archipelago), Thailan, and Vietnam. In this study region coresponding approximately to 2.3 kb of the cytochrome-b and D-loop genes was digested using 8 restriction enzymes (Hifl, Hin6II, MspI, HaeIII, BamHI, NdeII,DraI). Twelve mtDNA haplotypes were found in 40 specimens. Each of location sample was characterized by one haplotype, except Palembang (Sumatra, Indonesia), and Samarinda (Kalimantan, Indonesia) where 2 and 4 haplotypes were found respectively. The consensus calculated from 15 more parsimoious network showed that mtDNA were geographically distributed in three well differentiated clusters. The first cluster was compossed by population of both Thailand and Vietnam, the second cluster is composed by two populations from West Sumatra, and the lasst cluster by all other populations. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 104-112 |
| Abstraksi Narasi | : | Through the use of personal computers becoming increasingly wide-spread, a common mistake is to confuse computer science and computer literacy. The problem-solving emphasis of computer science borrows heavily from the areas of mathematics and logic. The computer scientist a model-builder when faced with a problem must construct models for its solution as a modelbilder, the computer scientist when solves a problem should construct models for its solution. The problems solved by computer scientist come from a variety of disciplines, make them be a quasi-expert in that disipline as well as in computer science. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 86-93 |
| Abstraksi Narasi | : | In this research, protoplast fusionof intergeneric system between Volvariella volvaceae and Rhizopus oryzae was studied. Morphology of the fusion product microorganism has similar character to Rhizopus oryzae. The fusion product microorganism ability in hydrolizing starch, protein, and cellulose was compared with both of parent fungi. The amylase activity of fusion product microorganism was lower than Rhizopus oryzae but similar to Volvariella volvaceae. However protease activity of the fusion product micro-organism was higher than Rhizopus oryzae, but similar to Volvariella volvaceae. The cellulosa activity of the fusion product microorganism was higher than Rhizopus oryzae, and lower as it compared to Volvariella volvaceae. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 67-78 |
| Abstraksi Narasi | : | Supercritical Fluid Extraction (SFE) is one of natural product isolation methods. It is fast, need a little organic solvent, and safe for environment. In this research, taxane from the leaves of Taxus x media varietas hicksii had been separated by SFE using mix solvents carbondioxide and methanol. The product was analyzed by HPLC and compared with taxol. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 194-202 |
| Abstraksi Narasi | : | The experiment was aimed to determine the fish silage efficiency in supporting the growth of tilapia fishes. The experiment was conducted in the Laboratory of Pasar Minggu Installation, Jakarta. The initial weight of fingerlings were 3.5 g. The fishes were fed fish silage of different combinatino of vegetative and animal protein. The treatment consisted of 4 replications. Data was recorded every 7 days and analized with ANOVA. The parameters were absolute growth, daily growth, food conversion and food efficiency. It`s showed that the fish silage (40%), after mixed with different vegetative and animal protein, reached 30% of protein. The silage of 30% protein content was significantly (P |
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