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INDONESIA
Jurnal Matematika Sains dan Teknologi
Published by Universitas Terbuka
ISSN : 14111934     EISSN : 24429147     DOI : -
Core Subject : Education, Agriculture,
Agriculture, Biological Sciences & Forestry Mathematics Other
Merupakan media informasi dan komunikasi para praktisi, peneliti, dan akademisi yang berkecimpung dan menaruh minat serta perhatian pada pengembangan Matematika, ilmu pengetahuan dan teknologi. Diterbitkan oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Terbuka.
Arjuna Subject : -
Articles 4 Documents
 1 
Search results for , issue " Vol 10 No 2 (2009)" : 4 Documents clear
PENGARUH PEMBERIAN BISA NAJA SPUTATRIX TERHADAP KADAR INTERLEUKIN-2 SERUM DARAH MENCIT YANG DIINDUKSI BENZO(A)PYRENE Anindyajati, Gina; Budiono, Bambang
Jurnal Matematika Sains dan Teknologi Vol 10 No 2 (2009)
Publisher : LPPM Universitas Terbuka

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Abstract

Cancer has become a global health problem arisen from exposure to benzo(a)pyrene. Interleukin-2 is one of immune system components believed to play roles in eradicating cancer. Cobra venom has antitumor effect and also contain protease which could boost up immune system. This research was aimed at analyzing Naja sputatrix venoms effect to increase interleukin-2 level in blood sera of mice induced by benzo(a)pyrene. Four group of Balb-C mice were used. The first group (control) and second group (treatment with Naja sputatrix venom) consist of 5 mices. There are 6 mices used in group 3 and 4, both were injected intramuscularly by benzo(a)pyrene (0,3L/0,01mL oleum oil) at day 1, 8 and 15. Three months after, observation was carried out to see changes occured in their liver and lungs. Naja sputatrix venom 0,1 mL (diluted in saline 1:100) was given to group 2 and 4 for 30 days. Blood was collected from all groups and centrifuge to form sera. Level of interleukin-2 in sera was measured by ELISA method. The results show that Group 2 has the highest mean level of interleukin-2 (136,837 pg/mL), and group 3 has the lowest (8,996 pg/mL). Level of interleukin-2 in group 4 is slightly higher than group 3 (10,632 pg/mL). Kruskal-Wallis analysis result come with Sig. 0,155; therefore shows no significance(p>0,05). It is therefore concluded that Naja sputatrix venom do not increase interleukin-2 level in blood sera of mice induced by benzo(a)pyrene
PEMODELAN FLUKTUASI MUKA AIR TANAH UNTUK MENDUKUNG PENGELOLAAN AIR PADA PERTANIAN LAHAN RAWA PASANG SURUT TIPE A/B Ngudiantoro, Ngudiantoro; Pawitan, Hidayat; Ardiansyah, Muhammad; J. Purwanto, M Yanuar; Susanto, Robiyanto H.
Jurnal Matematika Sains dan Teknologi Vol 10 No 2 (2009)
Publisher : LPPM Universitas Terbuka

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Abstract

The objectives of this research are to develop a model of water table fluctuation on tidal lowland area of A/B type. The results of the research are expected to support of the agricultural development on tidal lowland area, especially on water management, because the water management play an important role in the agricultural on tidal lowland area. The water table on tidal lowland area fluctuates according to space and time. The water table controls at a certain depth can support the plant growth and the pyrite oxidation restraint. The model of water table fluctuation which is developed in this research based on the ellipse concept. The research was conducted on the reclamation area of tidal lowland at the fourth tertiary block in P8-12S Delta Telang I, Banyuasin district, South Sumatra province. The simulations of model show good result of estimating the depth of water table on tidal lowland area of A/B type. The proportion of variation the depth of water table which can be explained by model that is 89,6% up to 95,5% with standard error of the estimate is 0,021-0,035 meters. The parameter of the water level in the tertiary canals has high sensitivity to the model.
MODEL DISTRIBUSI BAHAN AJAR UNIVERSITAS TERBUKA DAN IMPLEMENTASINYA Farihati, Sitta Alief; Aman, Amril; Ardana, I. N. Kutha
Jurnal Matematika Sains dan Teknologi Vol 10 No 2 (2009)
Publisher : LPPM Universitas Terbuka

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Abstract

Universitas Terbuka (UT) was implementing the centralized distribution of learning material, it is not considered efficient. Therefore, the decentralized distribution system which requires warehouses at certain regional offices will be proposed. The aims of this research are (1) investigating the decentralized learning material distribution model, (2) choosing the optimal location of warehouses to minimize the cost of learning material distribution, (3) choosing the regional offices which will be served optimally by each warehouse, (4) comparing efficiency of the centralized and decentralized learning material distribution system. The distribution problem is modeled as a linear mixed integer programming problem. The model will be solved using Branch and Bound method. This study considers centralized learning material distribution system and two alternative of decentralized learning material distribution systems, which are alternative 1 and alternative 2. It is found that in 2008 the cost of the alternative 2 is lower than the centralized learning distribution system. Besides, if the demand of learning material is increasing, the alternative 2 is still less costly than the other systems.
PENGARUH PEMBERIAN KOMBINASI PUPUK MAJEMUK NPK (25:7:7) DAN NPK KEMASAN (10:55:10) TERHADAP PERTUMBUHAN VEGETATIF TANAMAN KAMBOJA JEPANG (ADENIUM OBESUM) Sulistiana, Susi
Jurnal Matematika Sains dan Teknologi Vol 10 No 2 (2009)
Publisher : LPPM Universitas Terbuka

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Abstract

The objectives of this research were (i) to identify the effects of combination of compound fertilizers of NPK (25:7:7) and package NPK (10:55:10) on vegetative growth Adenium obesum in stead of Japanese frangipani plant, and (ii) to obtain the best combination of dose of NPK (25:7:7) and package NPK (10:55:10) in order to improve plant vegetative growth of Adenium obesum. This experiment was conducted in employed completely random design with factorial pattern of 4 and three times repetition. Factor I, the dose of NPK (25:7:7) fertilizer in 4 levels of dose : 0.0 g/L; 0.5 g/L; 1.0 g/L; and 1.5 g/L. Meanwhile, Factor II, the dose of package NPK (10:55:10) was applied with 4 levels of dose : 0.0 g/L; 0.5 g/L; 1.0 g/L; and 1.5 g/L. The data obtained were analyzed using variance analysis (ANOVA) technique to identify the influence of the treatment towards variables measured and mean separation was evaluated using DMRT with 5% level of difference. The results show that the use of combination of compound fertilizers NPK (25:7:7) and package NPK (10:55:10) improves plant vegetative growth of Adenium obesum. However, the use of combination of NPK 0.0 g/L and package NPK 0.5 g/L shows unsatisafactory results. The combination of NPK 1.5 g/L and package NPK 1.5 g/L provides the best result in improving plant vegetative growth of Adenium obesum.

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