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INDONESIA
Matematika dan Sains
Published by Universitas Negeri Surabaya
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Articles 67 Documents
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ADSORPSI ION LOGAM Cd(II) OLEH SBEG-g-PMMA Maria Paristiowati, ; Yusmaniar, ; Ratna Choiryana,
Matematika dan Sains Vol 18, No 1 (2011)
Publisher : Matematika dan Sains

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Abstract

The propose of research is to find the capability of the SBEG-g-PMMA to adsorb Cd(II) ion. This research used batch method with various of pH, contact time, and initial concentration of solution. Characterization was conducted by FTIR and AAS. The IR spectrum of the SBEG-g-PMMA showed the presence of carbonil group (C=O) at 1735.4 cm-1 and C-O ester at 1244.14 cm-1. While the optimum adsorption capasity of the SBEG-g-PMMA to Cd(II) ion was obtained at pH of 6, contact time of 10 minutes, and initial concentration of 300 ppm. Adsorption of Cd(II) ion using the SBEG-g-PMMA followed the Langmuir isotherm with maximum adsorption capasity of 47.60 mg/g adsorbent.-1 and C-O ester at 1244.14 cm-1. While the optimum adsorption capasity of the SBEG-g-PMMA to Cd(II) ion was obtained at pH of 6, contact time of 10 minutes, and initial concentration of 300 ppm. Adsorption of Cd(II) ion using the SBEG-g-PMMA followed the Langmuir isotherm with maximum adsorption capasity of 47.60 mg/g adsorbent.
BIOLARVASIDA EKSTRAK METANOL DAUN Siti Zulaihah, ; Sri Hidayati Syarief,
Matematika dan Sains Vol 18, No 1 (2011)
Publisher : Matematika dan Sains

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The proposes of reseach are (1) to know the biolarvaside activity of tapak dara’s methanol extract against Aedes aegypti larva, (2) to know effect of tapak dara’s methanol extract to lethality degree of Aedes aegypti larva. In this research extraction was conducted by maceration, the kinds of the secondary metabolites constituent were identified by qualitative test, and biolarvaside test using Aedes aegypti larva. Based on the research, the LC50 value of tapak dara’s methanol extract was 1804.82 ppm. The ANOVA analysis showed that concentration of tapak dara’s methanol extract enfluenced the lethality degree of Aedes aegypti larva. The higher the concentration of tapak dara’s methanol extract, the higher the lethality degree of Aedes aegypti larva.50 value of tapak dara’s methanol extract was 1804.82 ppm. The ANOVA analysis showed that concentration of tapak dara’s methanol extract enfluenced the lethality degree of Aedes aegypti larva. The higher the concentration of tapak dara’s methanol extract, the higher the lethality degree of Aedes aegypti larva.
PEMANFAATAN BENTONIT TERPILAR ALUMINIUM Abdish Shomad Nasrullah, ; Nurul Hidajati,
Matematika dan Sains Vol 18, No 1 (2011)
Publisher : Matematika dan Sains

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This research is purposed to know adsorption capability of pillaring bentonite in regenerating the waste cooking oil. Pillaritation was carried out using aluminium, while the quality of waste cooking oil yielded from regeneration was observed based on the colour, acid number, water conten, and peroxide number. The results of research showed that the bentonite pillared by AlCl3.6H2O 0.3 M and NaOH 0.5 M gave the maximal characteristics, namely acid number (0.2549%), peroxide number (5.626413 meq), water content (776 ppm) and color brightness (L3.5). It can be concluded that the pillaring bentonite could improve the quality of waste cooking oil and suitable with the quality requirements of SNI 01-3741-2002. 3.6H2O 0.3 M and NaOH 0.5 M gave the maximal characteristics, namely acid number (0.2549%), peroxide number (5.626413 meq), water content (776 ppm) and color brightness (L3.5). It can be concluded that the pillaring bentonite could improve the quality of waste cooking oil and suitable with the quality requirements of SNI 01-3741-2002.
EFEK REAKSI PADA SIFAT TRANSPORT GAS RAPAT BINER I Gusti Made Sanjaya,
Matematika dan Sains Vol 18, No 1 (2011)
Publisher : Matematika dan Sains

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Effect of chemical reaction was discribed using the hard ball collision model and the present chemical reaction model on properties of the binary dense gas transport experiencing reversible reaction according to equation : A + A B + B. The reactive collision used near the final condition ofreaction, with the smallest of chemical affinity and near equilibrium. Discussion was done through framework of gas kinetic theory using base of extended of Boltzman equation. Effect of chemical reaction was found to appear in coefficient of gas transport as at bulk viscosity in form e*/kT. e*/kT.
AKTIVITAS AMILASE, LIPASE, DAN PROTEASE PADA DIET SERAT PANGAN: VARIASI PH DAN LAMA PEREBUSAN Leny Yuanita, ; Suzana Surodjo, ; Wiwik Yuliastuti,
Matematika dan Sains Vol 18, No 1 (2011)
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The research objective: to describe the influence of variation of pH and boiling time on the activities of digestive enzymes. This research used Post Test only Control Group Design, which observed variables were the enzymes activities of amylase, protease, and lipase both in duodenum and pancreas. In vivo study using 54 Rattus norvegicus, Wistar strain. The treatment animals were divided into 8 groups treatment feeding and 1 group standard feeding. The treatment feeding was a diet with high fiber of long yard beans with variation of pH (3 and 7) and boiling time (0, 5, 20, 35 min). After the treatment period of 48 days, data were analyzed through inferential statistics ( = 0.05). Results showed that pH and boiling time affect on the enzymes activities of amylase, protease, and lipase both in duodenum and pancreas. At high fiber dietary of long yard beans, increasing pH and boiling time treatments, resulting the lowest decreasing digestive enzymes activities. All feeding treatments yielded the lower enzymes activities compare with the standard diet, except the activity of the pancreatic amylase on the treatment of pH 7 – 20 min or 35 min, and duodenum lipase on pH 3- 35 min of boiling time. The highest enzymes activities in the duodenum and pancreas were on the pH 7 - 35 min of boiling time treatment.
REGRESI SEGMENTED LINEAR DIBANDINGKAN Hery Tri Sutanto,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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Formation good regression model or suitable for a statistical data principlely was connected with scatter diagram of noticed variable. Application of regression model had two goal namely (1) to predict relationship one free variable or more and one unfree variable or more. (2) to predict value hoped for unfree variable if value of free variable known. In dailylife it was not always constant, so that it was necessary to have the suitable statistical model to data. The regresion studying it was called segmented regression. From scatter diagram could be predicted linier data pattern so that the first probability it could be applied simple linier regression model and second probability it was used linier segmented regression model if there is the difference of special dot pattern. Based on two linier regression model could be chosen the best linier regression model was regression model having the highest R2.
THE DIFFERENT EFFECT OF INSULIN AND GLIBENCLAMIDE ON SKELETAL MUSCLE CELLS Sri Kentjananingsih,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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The propose of research was to being sure in using the suitable medicine for different types of diabetes. This research used randomised control-group pretest-posttest design, almost every-day each of 30 old Norwegian white rats was starved for 2 days and was forced to an exhausted run-walk at least 1.5 hours. It rested 1 hour before it was handled. Results showed that although insulin had its effect only on smashed muscle only on 45’ (Hi:H), the effect was seen from 15’-45’ (Hi:Si). Glibenclamide had its effect faster on smashed muscle (15’) rather than on sliced muscle (45’) (Hg:H), but the significant difference on both forms muscle had seen on 15’ and 30’ (Hg:Sg). Both substance effected faster on smashed (from 15’-45’) (Hig:H), rather than on sliced muscle (only on 45’) (Sig:S), but the mixture effect on both forms of muscle had seen from 15’-45’ (Hig:Sig),. Compared to insulin, their mixture effect showed a significant difference only on sliced muscle 15’ (Sig:Si), While the decreasing glucose concentration on sliced and smashed muscle themselves had significant difference from 15’-45’ (H:S),. Therefore only glibenclamide, works slowly on cell membrane. Both insulin and glibenclaide work inside the cells, but glibenclamide works faster. In their mixture, insulin strengthened the effect of glibenclamide on cell membrane. i:H), the effect was seen from 15’-45’ (Hi:Si). Glibenclamide had its effect faster on smashed muscle (15’) rather than on sliced muscle (45’) (Hg:H), but the significant difference on both forms muscle had seen on 15’ and 30’ (Hg:Sg). Both substance effected faster on smashed (from 15’-45’) (Hig:H), rather than on sliced muscle (only on 45’) (Sig:S), but the mixture effect on both forms of muscle had seen from 15’-45’ (Hig:Sig),. Compared to insulin, their mixture effect showed a significant difference only on sliced muscle 15’ (Sig:Si), While the decreasing glucose concentration on sliced and smashed muscle themselves had significant difference from 15’-45’ (H:S),. Therefore only glibenclamide, works slowly on cell membrane. Both insulin and glibenclaide work inside the cells, but glibenclamide works faster. In their mixture, insulin strengthened the effect of glibenclamide on cell membrane.
ANALISIS INVERSI WAVEFORM TIGA KOMPONEN UNTUK MENENTUKAN MOMEN TENSOR GEMPA BUMI DI PULAU JAWA Muh. Rodli Masykur, ; Bagus Jaya Santosa,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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Abstract

IRIS noted 294 earthquakes happened in Indonesia, 28 of them in Java island. Seismogram analysis used three component waveform to obtain tensor moment and to know the broken plane pattern of subduction in Java. Research was started with requesting of quake data from IA and or geofon. Using ISOLA software it had been conducted convertion and data preprocessing, input of data consisted of: crustal model, event info, choising station, preparing raw data and defining seismic source, counting Green function, invertion, and plot of invertion product. Futher drawing fault-plane caused earthquake used hcplot software. Analysis results showed that tensor moment at 11 Agustus 2010 as much as Mrr = -1.629, Mtttt = 0.983, Mpppp = 0.645, Mrtrt = 1.820, Mrprp = -1.449, Mtptp = -0.761 and at 9 Nopember 2010 as much as Mrrrr = 0.613, Mtttt = -0.172, Mpppp = -0.441, Mrtrt = 0.232, Mrprp = -0.203, Mtptp = -0.309. The broken plane pattern growing at each were normal fault and reverse fault line with island. IRIS noted 294 earthquakes happened in Indonesia, 28 of them in Java island. Seismogram analysis used three component waveform to obtain tensor moment and to know the broken plane pattern of subduction in Java. Research was started with requesting of quake data from IA and or geofon. Using ISOLA software it had been conducted convertion and data preprocessing, input of data consisted of: crustal model, event info, choising station, preparing raw data and defining seismic source, counting Green function, invertion, and plot of invertion product. Futher drawing fault-plane caused earthquake used hcplot software. Analysis results showed that tensor moment at 11 Agustus 2010 as much as Mrr = -1.629, Mtttt = 0.983, Mpppp = 0.645, Mrtrt = 1.820, Mrprp = -1.449, Mtptp = -0.761 and at 9 Nopember 2010 as much as Mrrrr = 0.613, Mtttt = -0.172, Mpppp = -0.441, Mrtrt = 0.232, Mrprp = -0.203, Mtptp = -0.309. The broken plane pattern growing at each were normal fault and reverse fault line with island.
UJI Resonantor BUMBUNG TERTUTUP pada perangkat Gamelan Slentem dan gender UNTUK PENGUATAN BUNYI Yoyon K. Suprapto1, ; Aditya Prapanca2,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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Abstract

Gamelan@consists of@many devices which has@the characteristics sound. It is in fluenced by@ resonantor on each gamelanfs device. Resonantor@is useful@to strengthen the@sound character resulted by@set of gamelan. Each@gamelanfs device has the resonator in different form. It usually@located@under@the sound-producing@metal. Tubular is one of resonantor@form used@in@slentem@and@gender.@The diameter and length of the resonantor tube enfluenced to @the sound produced@by resonantors. @
AKTIVITAS ANTIMIKROBIA BAKTERI ASAM LAKTAT Guntur Trimulyono,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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The proposes of research were to isolate lactic acid bacteria from vegetable sample and to know their ability to produce antimicrobial compounds. Vegetable samples used were potato, cabbage, sweet potato, and carrot. From those samples it had been isolated 40 isolate predicted as lactic acid bacteria, followed corfirmation test using Gram coloring, catalase test, endospore coloring, and motility. Lactic acid bacteria isolate were screened their ability in inhibiting bacteria tets namely Pediococcus acidilactici LB 42, Staphylococcus aureus ATCC 25923, and Escherichia coli ATCC 35218. The results of reseach showed that four isolates could inhibite growing of Pediococcus acidilactici LB 42, Staphylococcus aureus ATCC 25923 and Escherichia coli ATCC 35218. The antimicrobial subtance produced by BAL isolate was predicted organic acid.

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