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KERAGAMAN MOLEKUL, POLA KIMIA, DAN HUBUNGAN BIOGENESIS SENYAWA-SENYAWA DARI TUMBUHAN AGLAIA DAN DYSOXYLUM (MELIACEAE) Tukiran,
Matematika dan Sains Vol 17, No 1 (2010)
Publisher : Matematika dan Sains

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Some non phenolic and phenolic compounds had been isolated for the first time from n-hexane and chloroform extracts of stem bark of Meliaceae plants, namely Aglaia odorata, Aglaia odoratissima, Aglaia elaeagnoidea and Dysoxylum gaudichandianum. These structures had been established based on spectroscopic data (UV-Vis, IR, NMR, FABMS and GC-MS). These isolated compounds had been studied about chemical diversity, chemical pattern and biogenetic relationship in the plants.

ANALISIS RADIOAKTIVITAS ALAM PADA SAMPEL COKLAT DAN SUSU BUBUK MENGGUNAKAN SPEKTROMETER GAMMA Sri Murniasih, ; Sukirno, ; Agus Taftazani,
Matematika dan Sains Vol 17, No 2 (2010)
Publisher : Matematika dan Sains

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Radioactivity content analyzed on milk and chocolate powdered samples produced at the West Java, Central Java, and East Java, had been done by gamma spectrometry with Germanium Lithium (GeLi) detector equipped by MESTROTM software and Multi Channel Analyzer (MCA) to analysis radionuclide and gamma gross. While analysis beta gross was done using Low Background Counter (LBC) with Geiger Muller (GM) detector and Analog Digital Converter (ADC). Activity of K40 on all samples ranges from 577.50 ± 13.49 Bq/Kg to 150.98 ± 9.00 Bq/K; Th232 ranges from 21.29 ± 0.82 Bq/Kg to 4.72 ± 0.71 Bq/Kg; Pb212 ranges from 3.41 ± 0.20 Bq/Kg to 2.50 ± 0.11 Bq/Kg; Pb214 ranges from 7.39 ± 0.34 Bq/Kg to 0,65 ± 0,07 Bq/Kg; Ra226 ranges from 9,14 ± 0,97 Bq/Kg to 6,02 ± 0,61 Bq/Kg dan Bi214 ranges from 5.25 ± 2.26 Bq/Kg to 1.73 ± 0.52 Bq/Kg. While beta gross and gamma gross activities ranges from 513.8 ± 30.83 Bq/Kg to 277.3 ± 21.33 Bq/Kg and 861.94 ± 5.76 mBq/Kg to 5.10 ± 2.04 mBq/Kg. Radionuclide activity content in all of milk and chocolate powdered samples that safe to be consumed. Using statistic test of ANOVA (a0.05) method found that difference of sample has influence significant on the activity of K40 Tl208, Pb212, Pb214, Bi214, Ra226 and gamma gross radioactivity while on beta gross there is no significant influence on sample difference.TM software and Multi Channel Analyzer (MCA) to analysis radionuclide and gamma gross. While analysis beta gross was done using Low Background Counter (LBC) with Geiger Muller (GM) detector and Analog Digital Converter (ADC). Activity of K40 on all samples ranges from 577.50 ± 13.49 Bq/Kg to 150.98 ± 9.00 Bq/K; Th232 ranges from 21.29 ± 0.82 Bq/Kg to 4.72 ± 0.71 Bq/Kg; Pb212 ranges from 3.41 ± 0.20 Bq/Kg to 2.50 ± 0.11 Bq/Kg; Pb214 ranges from 7.39 ± 0.34 Bq/Kg to 0,65 ± 0,07 Bq/Kg; Ra226 ranges from 9,14 ± 0,97 Bq/Kg to 6,02 ± 0,61 Bq/Kg dan Bi214 ranges from 5.25 ± 2.26 Bq/Kg to 1.73 ± 0.52 Bq/Kg. While beta gross and gamma gross activities ranges from 513.8 ± 30.83 Bq/Kg to 277.3 ± 21.33 Bq/Kg and 861.94 ± 5.76 mBq/Kg to 5.10 ± 2.04 mBq/Kg. Radionuclide activity content in all of milk and chocolate powdered samples that safe to be consumed. Using statistic test of ANOVA (a0.05) method found that difference of sample has influence significant on the activity of K40 Tl208, Pb212, Pb214, Bi214, Ra226 and gamma gross radioactivity while on beta gross there is no significant influence on sample difference.

ANALISIS RADIOAKTIVITAS ALAM PADA SAMPEL COKLAT DAN SUSU BUBUK MENGGUNAKAN SPEKTROMETER GAMMA Sri Murniasih, ; Sukirno, ; Agus Taftazani,
Matematika dan Sains Vol 17, No 2 (2010)
Publisher : Matematika dan Sains

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Radioactivity content analyzed on milk and chocolate powdered samples produced at the West Java, Central Java, and East Java, had been done by gamma spectrometry with Germanium Lithium (GeLi) detector equipped by MESTROTM software and Multi Channel Analyzer (MCA) to analysis radionuclide and gamma gross. While analysis beta gross was done using Low Background Counter (LBC) with Geiger Muller (GM) detector and Analog Digital Converter (ADC). Activity of K40 on all samples ranges from 577.50 ± 13.49 Bq/Kg to 150.98 ± 9.00 Bq/K; Th232 ranges from 21.29 ± 0.82 Bq/Kg to 4.72 ± 0.71 Bq/Kg; Pb212 ranges from 3.41 ± 0.20 Bq/Kg to 2.50 ± 0.11 Bq/Kg; Pb214 ranges from 7.39 ± 0.34 Bq/Kg to 0,65 ± 0,07 Bq/Kg; Ra226 ranges from 9,14 ± 0,97 Bq/Kg to 6,02 ± 0,61 Bq/Kg dan Bi214 ranges from 5.25 ± 2.26 Bq/Kg to 1.73 ± 0.52 Bq/Kg. While beta gross and gamma gross activities ranges from 513.8 ± 30.83 Bq/Kg to 277.3 ± 21.33 Bq/Kg and 861.94 ± 5.76 mBq/Kg to 5.10 ± 2.04 mBq/Kg. Radionuclide activity content in all of milk and chocolate powdered samples that safe to be consumed. Using statistic test of ANOVA (a0.05) method found that difference of sample has influence significant on the activity of K40 Tl208, Pb212, Pb214, Bi214, Ra226 and gamma gross radioactivity while on beta gross there is no significant influence on sample difference.TM software and Multi Channel Analyzer (MCA) to analysis radionuclide and gamma gross. While analysis beta gross was done using Low Background Counter (LBC) with Geiger Muller (GM) detector and Analog Digital Converter (ADC). Activity of K40 on all samples ranges from 577.50 ± 13.49 Bq/Kg to 150.98 ± 9.00 Bq/K; Th232 ranges from 21.29 ± 0.82 Bq/Kg to 4.72 ± 0.71 Bq/Kg; Pb212 ranges from 3.41 ± 0.20 Bq/Kg to 2.50 ± 0.11 Bq/Kg; Pb214 ranges from 7.39 ± 0.34 Bq/Kg to 0,65 ± 0,07 Bq/Kg; Ra226 ranges from 9,14 ± 0,97 Bq/Kg to 6,02 ± 0,61 Bq/Kg dan Bi214 ranges from 5.25 ± 2.26 Bq/Kg to 1.73 ± 0.52 Bq/Kg. While beta gross and gamma gross activities ranges from 513.8 ± 30.83 Bq/Kg to 277.3 ± 21.33 Bq/Kg and 861.94 ± 5.76 mBq/Kg to 5.10 ± 2.04 mBq/Kg. Radionuclide activity content in all of milk and chocolate powdered samples that safe to be consumed. Using statistic test of ANOVA (a0.05) method found that difference of sample has influence significant on the activity of K40 Tl208, Pb212, Pb214, Bi214, Ra226 and gamma gross radioactivity while on beta gross there is no significant influence on sample difference.

ANALISIS RADIOAKTIVITAS ALAM PADA SAMPEL COKLAT DAN SUSU BUBUK MENGGUNAKAN SPEKTROMETER GAMMA Sri Murniasih, ; Sukirno, ; Agus Taftazani,
Matematika dan Sains Vol 17, No 2 (2010)
Publisher : Matematika dan Sains

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Radioactivity content analyzed on milk and chocolate powdered samples produced at the West Java, Central Java, and East Java, had been done by gamma spectrometry with Germanium Lithium (GeLi) detector equipped by MESTROTM software and Multi Channel Analyzer (MCA) to analysis radionuclide and gamma gross. While analysis beta gross was done using Low Background Counter (LBC) with Geiger Muller (GM) detector and Analog Digital Converter (ADC). Activity of K40 on all samples ranges from 577.50 ± 13.49 Bq/Kg to 150.98 ± 9.00 Bq/K; Th232 ranges from 21.29 ± 0.82 Bq/Kg to 4.72 ± 0.71 Bq/Kg; Pb212 ranges from 3.41 ± 0.20 Bq/Kg to 2.50 ± 0.11 Bq/Kg; Pb214 ranges from 7.39 ± 0.34 Bq/Kg to 0,65 ± 0,07 Bq/Kg; Ra226 ranges from 9,14 ± 0,97 Bq/Kg to 6,02 ± 0,61 Bq/Kg dan Bi214 ranges from 5.25 ± 2.26 Bq/Kg to 1.73 ± 0.52 Bq/Kg. While beta gross and gamma gross activities ranges from 513.8 ± 30.83 Bq/Kg to 277.3 ± 21.33 Bq/Kg and 861.94 ± 5.76 mBq/Kg to 5.10 ± 2.04 mBq/Kg. Radionuclide activity content in all of milk and chocolate powdered samples that safe to be consumed. Using statistic test of ANOVA (a0.05) method found that difference of sample has influence significant on the activity of K40 Tl208, Pb212, Pb214, Bi214, Ra226 and gamma gross radioactivity while on beta gross there is no significant influence on sample difference.TM software and Multi Channel Analyzer (MCA) to analysis radionuclide and gamma gross. While analysis beta gross was done using Low Background Counter (LBC) with Geiger Muller (GM) detector and Analog Digital Converter (ADC). Activity of K40 on all samples ranges from 577.50 ± 13.49 Bq/Kg to 150.98 ± 9.00 Bq/K; Th232 ranges from 21.29 ± 0.82 Bq/Kg to 4.72 ± 0.71 Bq/Kg; Pb212 ranges from 3.41 ± 0.20 Bq/Kg to 2.50 ± 0.11 Bq/Kg; Pb214 ranges from 7.39 ± 0.34 Bq/Kg to 0,65 ± 0,07 Bq/Kg; Ra226 ranges from 9,14 ± 0,97 Bq/Kg to 6,02 ± 0,61 Bq/Kg dan Bi214 ranges from 5.25 ± 2.26 Bq/Kg to 1.73 ± 0.52 Bq/Kg. While beta gross and gamma gross activities ranges from 513.8 ± 30.83 Bq/Kg to 277.3 ± 21.33 Bq/Kg and 861.94 ± 5.76 mBq/Kg to 5.10 ± 2.04 mBq/Kg. Radionuclide activity content in all of milk and chocolate powdered samples that safe to be consumed. Using statistic test of ANOVA (a0.05) method found that difference of sample has influence significant on the activity of K40 Tl208, Pb212, Pb214, Bi214, Ra226 and gamma gross radioactivity while on beta gross there is no significant influence on sample difference.

EFEKTIVITAS SPODOPTERA LITURA MULTIPLE NUKLEOPOLYHEDROSIS VIRUS (SlMNPV) HASIL PERBANYAKAN PADA SEL LINE UNTUK MENGENDALIKAN LARVA Spodoptera litura SKALA GREEN HOUSE DENGAN BERBAGAI WAKTU APLIKASI Mahanani Tri Asri, ; Nur Ducha,
Matematika dan Sains Vol 17, No 2 (2010)
Publisher : Matematika dan Sains

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The biological control is the best choice to control plant pest population. SlMNPV is the one kind of the biological control agent which effective to control the Spodoptera litura caterpillar. The caterpillar attacked to many kind of agrocultural crops like Ricinus comunis, soybean, cotton, and tobacco. The effectivenes SlMNPV reproduce cresult in cell line of to control the caterpillar in green house in various concentrations. This research conducted to know the effect of virus concentration ( 7,1 x 107 PIBs/ml, 7,1 x 108 PIBs/ml, and 7,1 x 109 PIBs/ml) to control the caterpillar (Spodoptera litura) death in three application times (the morning; 06.00; day :12.00 and evening: 16.00). The results of the research showed that the virus concentration of 7,1 x 108PIBs/ml PIBs/ml effective to control caterpillar population because the caterpillar death reached 80% (biological control standart) and the best time to applicate was evening.7 PIBs/ml, 7,1 x 108 PIBs/ml, and 7,1 x 109 PIBs/ml) to control the caterpillar (Spodoptera litura) death in three application times (the morning; 06.00; day :12.00 and evening: 16.00). The results of the research showed that the virus concentration of 7,1 x 108PIBs/ml PIBs/ml effective to control caterpillar population because the caterpillar death reached 80% (biological control standart) and the best time to applicate was evening.

PERBANDINGAN PERTUMBUHAN TANAMAN GULMA Yuliani1, ; Yuni Sri Rahayu1, ; Evie Ratnasari1, ; Mitarlis2,
Matematika dan Sains Vol 17, No 2 (2010)
Publisher : Matematika dan Sains

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The aims of research were to know the growth difference between the weeds crop and the cultivation crop after treated by the alelochemical isolated from the leaves of Pluchea indica Less. Plants test for the cultivation crop were green bean and peanut (leguminaceae), tomato and chili (Solanaceae). While for weeds crop were Mimosa pudica and Ruellia tuberosa (leguminaceae), Amaranthus spinosus and Celosia arganteae (Amaranthaceae). Concentration used were 1%, 0.50%, 0.25%, 0.125% and 0%. Design research used was completed randomized design with one factor. Result of research showed that there are differenciate the growth of weeds and cultivation crop after treated using alelochemical isolated from Pluchea indica. For cultivation crop, green bean was very tolerant to alelochemical, followed by chili and tomato. While weeds crop, the best growth was showed by Celosia, followed by Ruellia, Amarantus, and Mimosa. The bigger alelochemical concentration used, the bigger inhibition of growth. The weeds crop was inhibited more bigger than cultivation crop.

PERKEMBANGAN STRUKTUR AERENKIM RHIZOFOR Enny Susiyawati, ; Johanes Djoko Budiono, ; Rinie Pratiwi Puspitawati,
Matematika dan Sains Vol 17, No 2 (2010)
Publisher : Matematika dan Sains

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Rhizophora mucronata is one of part of mangrove which adapt to environment by forming aerenkim, especially at its rhizophore. Aerenkim of rhizofore submerged in substrat developed faster than that one on substrat. Therefore research about aerenkim structure development was very important to be conducted. This research was obseravational research. Observation was done on rhizophore preparate made by parafin method and coloring using safranin. Results of research showed that during develpoment period, aerenkim of rhizophore R. mucronata experience structure developmet. Aerenkim of rhizophore submerged in substrat developed faster than that one on substrat (air root). Aerenkim of R. mucronata was formed through sizogen way. is one of part of mangrove which adapt to environment by forming aerenkim, especially at its rhizophore. Aerenkim of rhizofore submerged in substrat developed faster than that one on substrat. Therefore research about aerenkim structure development was very important to be conducted. This research was obseravational research. Observation was done on rhizophore preparate made by parafin method and coloring using safranin. Results of research showed that during develpoment period, aerenkim of rhizophore R. mucronata experience structure developmet. Aerenkim of rhizophore submerged in substrat developed faster than that one on substrat (air root). Aerenkim of R. mucronata was formed through sizogen way.

STUDI HIDROLISIS ENZIMATIK JERAMI PADI UNTUK PRODUKSI HIDROGEN MENGGUNAKAN CAMPURAN CRUDE SELULASE DARI Nadiem Anwar, ; Arief Widjaya, ; Sugeng Winardi,
Matematika dan Sains Vol 17, No 2 (2010)
Publisher : Matematika dan Sains

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The aims of research are to compare effectifity the mixture of cellulase enzyme crude from Trichoderma reesei and Aspergillus niger with comercial A. Niger cellulase from Fluka Biochemika and study enfluence of enzyme ratio to substrat. Enzyme crude was made by solid fermentation. T. reesei was incubated for 6 days, while A. niger was incubated for 8 days. One unit activity of A. niger cellulase was mixed with two unit activity of T. reesei cellulase. The straw was milled and was sieved 120-140 mesh, then delignificated using NaOH 2% for 6 hours and at themperature of 85 oC. Yield of glucose was analyzed by dinitrosalycilic acid and measured using spectrophotometer at wavelength of 540 nm. Experiment results showed that the mixture of cellulase enzyme crude from T. reesei and A. niger 2 : 1 U/U was similar with commercial A. niger cellulase in case the bigger enzyme used, the bigger glucose resulted, but its ascension became smaller so enzyme efficiency decreased. The mixture of cellulace crude enzyme of T. reesei with A. niger of 2 : 1 U/U, two times more effective in hydrolizing the cellulose of the straw was compared with comercial A. niger cellulase from Fluka Biochemika.oC. Yield of glucose was analyzed by dinitrosalycilic acid and measured using spectrophotometer at wavelength of 540 nm. Experiment results showed that the mixture of cellulase enzyme crude from T. reesei and A. niger 2 : 1 U/U was similar with commercial A. niger cellulase in case the bigger enzyme used, the bigger glucose resulted, but its ascension became smaller so enzyme efficiency decreased. The mixture of cellulace crude enzyme of T. reesei with A. niger of 2 : 1 U/U, two times more effective in hydrolizing the cellulose of the straw was compared with comercial A. niger cellulase from Fluka Biochemika.

SINTESIS DAN KARAKTERISASI BENTONIT Asep Supriatna, ; Ahmad Mudzakir, ; Adam Nugraha,
Matematika dan Sains Vol 17, No 2 (2010)
Publisher : Matematika dan Sains

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Research about modification of bentonite using fatty imidazolinium had been done. Three kind fatty imidazolinium iodide compound succeeded to be synthezed using microwave irradiation method with various R substituents, namely 2-cis-oleil-imidazolinium iodide (surf1) with R = cis-ù-9-CH3(CH2)16-CH2-, 2-stearil-2-imidazolinium iodide (surf2) with R = CH3(CH2)16-CH2-, and 2-palmitil-2-imidazolinium iodide (surf3) with R = CH3(CH2)14-CH2-. Their characteristics were analyzed using FTIR and TG/DTA. Thermal stability analysis showed that Stear-Imz/NaMMT, Pal-Imz/NaMMT , and cis-Ole-Imz/NaMMT dicomposed at 441,9oC; 406,9oC; and 441,8 oC, respectively.3(CH2)16-CH2-, 2-stearil-2-imidazolinium iodide (surf2) with R = CH3(CH2)16-CH2-, and 2-palmitil-2-imidazolinium iodide (surf3) with R = CH3(CH2)14-CH2-. Their characteristics were analyzed using FTIR and TG/DTA. Thermal stability analysis showed that Stear-Imz/NaMMT, Pal-Imz/NaMMT , and cis-Ole-Imz/NaMMT dicomposed at 441,9oC; 406,9oC; and 441,8 oC, respectively.

PENGARUH PERLAKUAN ASAM TUNGGAL DAN BERURUTAN PADA LIGNIT DAN DAYA SERAPNYA PADA ARSENIT Damris Muhammad, ; Abu Bakar,
Matematika dan Sains Vol 17, No 2 (2010)
Publisher : Matematika dan Sains

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The three lignite samples with difference mineral content were treated using single acid of HCl and successively with HCl and H2SO4. The active carbon produced was treated by heating at 900°C. Reaction isoterm of adsorbent resulted was tested to arsenite. Degree of demineralisation of lignite based on the kind of acid and demineralisation step done. The high of demineralisation degree will give the high adsord to active carbon resulted. 2SO4. The active carbon produced was treated by heating at 900°C. Reaction isoterm of adsorbent resulted was tested to arsenite. Degree of demineralisation of lignite based on the kind of acid and demineralisation step done. The high of demineralisation degree will give the high adsord to active carbon resulted.

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