| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 216-224 |
| Abstraksi Narasi | : | The purpose of this research was to assess the capabilities of Cerithidea sp, Hydrobia sp and it`s combination in decreasing the quality of organic matter shrimp pond waste. Design of experiment was completely randomized with four treatments and four replications. The treatments consisted of control, Cerithidea sp, Hydrobia sp and it`s combinations. The observation of the main parameter was the concentration of total organic matter in sediment. The data were analized by the Duncan Multiple Range Test (DMRT) and Polynomial regression. The result of the observation indicated that the quality of total organic matter shrimp pond waste were not clear. The duration of treatment was highly significant in decreasing the quantity of total organic matter shrimp pond waste. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 254-264 |
| Abstraksi Narasi | : | The study was aimed to determine the species name for an entomophthoralean fungus that infected larvae of alfalfa weevils in the State of Kentucky, US. Larval cadavers of the weevil were field collected from Henry Co., Fayette Co., and Barren Co., respectively, during Spring of 1988. The cadavers were individually placed on a platforn inside a conidiation arena (room temperature,±100% RH, and dark) to allow the fungus to shower its conidia for 24 hours. Thirteen hundred fungal primary conidia that had been discharged from fourteen alfalfa weevil cadavers were measured using a Watson image-splitting eyepiece installed to the microscope. The lengths (averaged 22,6 myu-m) and diameters (avaraged 8,7 myu-m) of the fungal conidia were then mapped into a digital line whose scales represent the gradient of lengths or diameters of conidia of Zoophthora species. Despite the phenetic affinity of the fungal conidia dimension to that of Zoophthora radicans (Brefeld) Batko, the fungus was determined as Zoophthora phytonomi (Arthur) Batko with the following synonyms: Zoophthora phytonomi (Arthur) Batko, Entomophthora phytonomi Arthur, Erynia phytonomi (Arthur) Humber, Ben-Ze`ev & Kenneth, Entomophthora (Tarichium) punctata Garbowski, and Tarichium phytonomi Jaczewski. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 140-152 |
| Abstraksi Narasi | : | There was carried out analysis on transport properties of high Tc superconductor. There are new phenomena in high Tc superconductor, such as excess conductivity and intrinsic broadening which show in temperature dependence resistivity curve. In term of Aslamazov-Larkin theory for temperature above the mean field transition temperature was obatained mathematical model for excess conductivity phenomena. Inversely, within context of Kosterlitz-Thoulles theory at temperatura below the mean field transition temperature was found a mathematical equipment for analesis data from experiment result. |
| Nama Pengarang | : | Sumardi, Abdurrahman, F.X. Susilo, Arwin Achmad, R. Betta Rudibyani dkk, Usman, Mustofa , Dian Kurniasari, Eri Setiawan, Warsono, Suharsono S, Dorrah Aziz, Pulung Karo Karo, Eri Setiawan, John Hendri, Nengah Maharta, M. Kanedi, Judi Hadi Sardjono, Trikinasih Handayani |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 233-240 |
| Abstraksi Narasi | : | The experiment was carried out to characterize antibacterial substance which produced by earthworm microbe (Streptomyces sp.). This experiment was conducted at IPB Biochemistry laboratory and General Bacteriology Laboratory of Balitvet, Bogor. The antibacterial substance from Streptomyces sp. could inhibit the growth of Gram Positive bacteria (Bacillus cereus, B. thermophilus, Staphylococcus aureus and Staphylococcus epidermidis) but not inhibit the Gram negative bacteria (Sal-monella typhi, Escheriachia coli, and Pseudomonas aeroginosa). The antibacterial substances were glucopeptide. The TLC analises showed that the antibacterial substance produced by Streptomyces sp. had two active fractions on Rf : 0,61 and Rf : 0, 10. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 20-23 |
| Abstraksi Narasi | : | When rhizobia are used as seed inoculant, seed-appliedn fungicides might be harmful to the nitrogen fixing bacteria. The experiments were conducted to study the effect of four kinds of fungicides on survival of rhizobium on peanut seeds and their nodulating ability. The fungicides tested were tetrachlorothalonitrile (Daconil) manganous athylene bisditthiocarbamate with carbendazim (Delsene), N-trichloromethylthio-4-cyclohexene-1,2-benzimidazole carbamate (Benlate); each was given at the level 2 g/kg seed. The rhizobium strain used in this experiment was isolated from legin. Measurements of compability include plate counts for survival of rhizobium, and counts of taproot nodules on plants at three weeks of age. Plate counting and planting were conducted 15 minutes after the fungicides treated seeds were innoculated with peat-base inoculant. The rhizobium strain tested was found to be compatible only with Benlate. The other three fungicides were toxic to the rhizobium and greatly reduced taproot nodulation of the plants. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 80-90 |
| Abstraksi Narasi | : | Study on interaction between radiation of beta particle (Sr^90) with materials involve an energy transformation to the materials. Materials which is consist of atomic nuclei and extra-nuclei electron likely interact with beta particle. An effect of this interaction is that penetration of particle depend on the type, energy radiation and characteristics of absorber. The results of the study were that non-metal absorber materials for beta particle have maximum range (R-beta). The maximum range values were affected by material density and density of electron per cm square. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 122-135 |
| Abstraksi Narasi | : | Randomized Complete Block Design is used in many scientific research due to the simplicity in its design and analysis, but in the case there are some observations are missing, than the analysis become very complicated to be handled. If one observation is missing, Yates give an approach to overcome this kind of problem. The Yates`s ideas is to first estimate the missing one, and then inserted the estimated values into the data and standard analysis used as if there is no missing observation, except one degrees of freedom reduce for the degree of freedom for error. If, however, two or more observations are missing then the problem even MORE COMPLICATED. Biggers give an ideas which is more general then Yates to estimate the missing observations. But the problem the expectation for the sum of squares for treatment are over estimate. Baside, some assumption of the analysis of variance are violated, such as the assumption of independent. Another approach to handle this problem are Satterthwaite approximation and Linear Model approach. The simulation study show that the type I error for Yates-Biggers approach are over estimates, while the Satterthwaite and Linear Model approach perform well and both almost the same, but the problem for the Satterthwaite approximation is very complicated because it`s involved the calculation for the expectation of sum of squares. The research recommend that to analysis the missing observation we use Linear Model approach because the approach has exact distribution besides it relatively easy compare to the other approach. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 24-32 |
| Abstraksi Narasi | : | The mitochondria development was observed in early germinating seeds of winterfat (Ceratoides lanata (Pursh) J.T. Howell) harvested in different years (1986 = old; 1993 = new) from the micrograph of Transmission Electrone Microscope. The Old and new seeds were imbibed at different temperatures (5 and 20 C). The results was conducted in germinating seeds with the water content of 20% and 50%. The results showed that during imbibition, alteratian of mitochondrial structure of winterfat radicles occured more rapidly at 20 C than at 5 C in both 1986 and 1993 seeds. Mitochondria of 1993 had more prominent membrane and cristae than those of in 1986 seeds. The moral mitochondrial structure which is typical of hydrated cells was observed on seeds of 1993 hydrated to 20% moisture content at 5 C. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 107-113 |
| Abstraksi Narasi | : | In a multiple linear regression, sometimes we need to test some of the parameters or group of parameters, test is to know whether the parameters are significantly different fron zero or not. The paper discusses some tests for partial parameter in the multiple linear regression using the R(.) method. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 71-79 |
| Abstraksi Narasi | : | A nitrogen ion implantation to the surface of AISI H13 steels has been carried out using an ion implation machine at various ion dose and energy. The changes in surface hardness was tested by means of micro hardness tester MXT70. For ion dose variation, from 3,05 x 10^16 ion/cm^2 and to 7,63 x 10^16 ion/cm^2, and energy range from 20 ke V to 100 Ke V, it is found that the optimum micro hardness (499±20) KHN is achieved at ion dose of 61,07 x 10^16 ion/cm^2 and energy 100 ke V. |
Unduh Dokumen Berkas PDF Utama