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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 6 Documents
 1 
Search results for , issue " Vol 9 No 1 (2008)" : 6 Documents clear
PENGARUH PENCUCIAN PADA TANAH TERCEMAR NATRIUM TERHADAP PERTUMBUHAN TANAMAN Adji, Sandra Sukmaning
Jurnal Matematika Sains dan Teknologi Vol 9 No 1 (2008)
Publisher : LPPM Universitas Terbuka

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Abstract

Sodium (Na) was found as one of chemical elements that able to disturb plants that grow along the Cikijing river. This river water that had been detected as contains high sodium, whereas the river water is still used by local farmers to irrigate their rice fields. The aim of this research are to identify the effect of bleaching process on the Na polluted soils toward the plant growth. Experiment was conducted in a greenhouse using rice field soils that contains high Na as the experiment material. The soils were washed using deepwater well and filtered water. Filtering was processed using zeolit and white sand, whereas rice plants were used as indicator. Result show that bleaching with deep water well and filtered water are both able to reduce the contain on Na in the soils. The application of deep well water and filtered water has shown a significant influence toward the height of the rice plants and the number of productive rice buds. The rice plants irrigated by deep water well are seen as higher in growth and bigger in number of productive rice buds compare to rice plants watered with filtered irrigation. The length (height) of plant watered with deep water well (99.1 cm) was significantly different with rice plants watered with filtered water (80.8 cm). On the other hand, the average number of 36 productive rice buds watered with deep water well is significantly different with rice plants watered by filtered water in the number of 23.  
KONSENTRASI TIMBAL (Pb) PADA PERAIRAN DI SEKITAR TELUK JAKARTA Rumanta, Maman; Latief, Amril; Rahayu, Ucu; Ratnaningsih, Anna; Nurdin, Gusti
Jurnal Matematika Sains dan Teknologi Vol 9 No 1 (2008)
Publisher : LPPM Universitas Terbuka

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Abstract

he purpose of this study is to get information about river that has the greatest contribution to cause Pb pollution in the Jakarta Bay. Nine (9) of 13 rivers flowing into Jakarta Bay were chosen. They were Citarum, Bekasi, Cilincing, Marunda, Ciliwung, Sunter, Cideng, Angke, and Cisadane. Sampling were taken in two periods of times, rainy and dry season of 2006 with triple repeatations. pH and temperature of samples as proponent data were measured insitu. Pb concentration in the water of the river was measured by using AAS flame in the laboratory of Balai Penelitian Tanah Bogor. Data was analyzed statistically (one way ANOVA and t-test) by using SPSS 11.5 software. It was shown that Pb concentration of estuary water surrounding Jakarta Bay has been exceeding threshold level. There was a tendency that Pb concentrations of water in rainy season are lower than that in dry season except in Ciliwung River. The anomaly of Ciliwung River was probably caused by some industries which throw their wastes into Ciliwung River in the rainy season. It was concluded that all of 9 rivers have a significant contribution to Pb pollution in Jakarta Bay, and the most was from Ciliwung River.
POTENSI RUMPUT LAUT DI PANTAI BAYAH, KABUPATEN LEBAK, BANTEN SEBAGAI ANTIBAKTERI Escherichia coli Triastinurmiatiningsih, Triastinurmiatiningsih; Haryani, Tri Saptari
Jurnal Matematika Sains dan Teknologi Vol 9 No 1 (2008)
Publisher : LPPM Universitas Terbuka

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Abstract

Antibacterial potency of some seaweed against Escherichia coli has been known. The aim of this research is to know the species of seaweeds from Bayah beach Lebak Banten which may be used as antibacterial against Escherichia coli. Twenty one seaweed species samples from Bayah Beach Lebak Banten were exstracted by organic solvent of absolute methanol according to Espeche, Fraile, and Mayer (1984) and Darusman, Sayuti, Komar & Pamungkas (1992) methods. The antibacterial activities were examined by means of Kirby-Bauer or diffusion method. The results showed antibacterial activities occur from the extract of Boodlea composite, Chaetomorpha crassa, Ulva fasciata, Sargassum crustaefolium, Padina australis and Halimeda gracilis. Sofar, Padina australis extract had shown better inhibitory activities than others.
MODEL SISTEM DINAMIS UNTUK ESTIMASI PENCEMARAN UDARA DARI EMISI KENDARAAN BERMOTOR DI JAKARTA Soleiman, Nuraini; Tarumingkeng, Rudy C
Jurnal Matematika Sains dan Teknologi Vol 9 No 1 (2008)
Publisher : LPPM Universitas Terbuka

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Abstract

Air pollution from vehicle emission becomes a major problem in urban areas, including Jakarta, Indonesia. This vehicle emission worsening ambient air concentration because of increasingly use of diesel engine for urban transportation, which exhaust particulate matter. This pollutan pose adverse health effect especially resparatory problems and premature mortality. This paper presents a model for estimating the level of pollution and the impact of that pollution on human health. An air quality model is developed using Gaussian model for urban area and the social-economic impact are estimated using Dose Response function. Simulation of the model shows a dynamic model is a powerfull tool for estimating the pollution level and the impact of the pollution. The result of the simulation can be used as basic information for decision makers to design some environmental policies for reducing the pollution level from vehicles emission.
TINGKAT PARTISIPASI PEREMPUAN PENGOLAH IKAN DALAM KELOMPOK USAHA BERSAMA DI CISOLOK, SUKABUMI Yuliana, Ernik; Farida, Idha; Kusumawati, Enny
Jurnal Matematika Sains dan Teknologi Vol 9 No 1 (2008)
Publisher : LPPM Universitas Terbuka

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Abstract

Traditional fish processing industries in Cisolok Sukabumi is operated mainly by women organized in Kelompok Usaha Bersama (KUB). This study is aimed to explain the influence of women characteristics on their participatory level in KUB activities exploratory research design with survey method were used to collect data. Sample populations of this study were all fisherwomen who process fish product in KUB. Forty samples were chosen with random sampling and datacollected were analysed by using structural equation model (SEM). The results show that participation level of fisherwomen in KUB is still low. Fisherwomen characteristics have no significant influence to participation level in KUB activities. Structural model obtained is not fit between hypothetic model and sample data. Therefore the model can not be applied in the field. But at the other hand, KUB have to intensify means to give the skill extension for fisherwomen so that participatory rate will increase.
ESTIMASI EMISI DIOKSIN/FURAN DAN FAKTOR-FAKTOR YANG MEMPENGARUHI KONSENTRASI EMISI KE UDARA YANG BERASAL DARI INDUSTRI LOGAM Warlina, Lina; Noor, Erliza; Fauzi, Akhmad; Tarumingkeng, Rudy C; Sutjahjo, Surjono H
Jurnal Matematika Sains dan Teknologi Vol 9 No 1 (2008)
Publisher : LPPM Universitas Terbuka

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Abstract

Dioxin/furan is one of the persistent organic pollutants (POPs) that the government and public in Indonesia has not taken care of, as there is currently no policy on reducing dioxin/furan emission, even according to previous research dioxin/furan emission has already high. Steel industries produce dioxin/furan emission that will give negative impact to the people (cancer and death) and environment. The objective of this research was to estimate dioxin/furan emission and to determine factors that influence dioxin/furan emission concentration on the air, especially from steels industries. Methods employed in this research used emission factors to estimate dioxin/furan emission and Gaussian dispersion modeling to estimate emission concentration. The result showed that dioxin/furan emission is 9,38-13,54 gTEQ and it has to be reduced. Production is main factor to contribute dioxin/furan emission to the air. Besides that, emission concentration also depends on temperature, wind speed, height of stacks and radius from the site to the recipient. The conclusion of the research is dioxin/furan emission should be reduced, by means of first or second treatment.

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