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INDONESIA
Matematika dan Sains
Published by Universitas Negeri Surabaya
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Core Subject : Education,
Mathematics
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Articles 12 Documents
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Search results for , issue " Vol 18, No 2 (2011)" : 12 Documents clear
REGRESI SEGMENTED LINEAR DIBANDINGKAN Hery Tri Sutanto,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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Abstract

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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Abstract

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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Abstract

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.
AKTIVITAS ANTIMIKROBIA BAKTERI ASAM LAKTAT Guntur Trimulyono,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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Abstract

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.
AKTIVITAS ANTIMIKROBIA BAKTERI ASAM LAKTAT Guntur Trimulyono,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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Abstract

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.
OPTIMASI DOSIS ALOKSAN UNTUK INDUKSI DIABETES MENGGUNAKAN HEWAN MODEL TIKUS PUTIH BETINA Nur Qomariyah 1, ; Mulyati Sarto2,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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Abstract

Alloxan was one diabetogen often used to study diabetes either with single or repeated doses. Single dose used for induction of diabetic rats ranged 100-180 mg/kgbw, but the results are often not satisfied or not maximum, the success rate, mortality, and duration of diabetic conditions in experimental animals. The purpose of this study to determine the dose of alloxan for induction of diabetic which lasted more than 3 weeks. The research was done with complete randomized design using female white rats, Wistar strain, age 4 months, weight 170-200 grams for 20 days. Thirty-five rats were divided into seven groups, were 5 of each. All test animals induced with aloksan monohydrate in a dose respectively 100, 110, 120, 130, 140, 150, and 160 mg/kgbw intraperitonially. The results were analyzed ANAVA and LSD (p <0.05). The results for 20 days showed dose alloxan of 100 and 110 mg / kgbw could not produce a diabetic condition, dose of 120 mg/ kgbw can induce diabetic but did not survive more than 7 days, the dose can induce diabetic 130mg/kgbw which last up to 20 days. Doses of 140, 150, and 160mg/kgBB can induce diabetic, but have high mortality rate of between 60-80%. Therefore, dose of alloxan 130 mg/kgbw most effective for the induction of diabetic and last up to 20 days and potentially more than 20 days.
SINTESIS DAN KARAKTERISASI KATALIS Co-Al-MCM-41 Choirul Anam, ; Ratna Ediati,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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Abstract

MCM-41 is a material that can be used as support for the properties he owned, among other things a uniform pore size and specific surface area is large. In this study has successfully created a catalyst Co-Al-MCM-41 with a hydrothermal method in the form of white powder into the ash-gray with a specific surface area ratio of 20 = 969.01 m2 / g and the ratio 40 = 1078.95 m2 / g and can used as a catalyst in cyclization cytronelal. The results of characterization by XRD, FT-IR and N2 adsorption-desorption showed that the catalyst Co-Al-MCM-41 has the same structure mesopori material MCM-41 is marked by the emergence of characteristic peaks difractogram at 1.8-2.4 ° 2 approximately, 3.5 -4.12 °, 4.31-4.82 °, and 5.64-6.00 °, and the pore size distribution between 30.49-34.09 Å, has a hexagonal shape and uniform particle morphology with average size 1 m. Results desorption nitrogen absorption analysis showed the surface area decreased with the growing amount of Co loading. Catalytic activity of Al-MCM-41 and Co-Al-MCM-41 at cyclization cytronelal reaction influenced by the nature of the acidity of the catalyst, which catalyst has a number of the more Lewis acid and Bronsted acid side has less active and selective nature of the cyclization reaction cytronelal be isopulegol. The highest activity of 81.30% and the highest selectivity of 75.10% for isopulegol shown by the catalyst Co-Al-MCM-41(20) in the solvent toluene. 2 / g and the ratio 40 = 1078.95 m2 / g and can used as a catalyst in cyclization cytronelal. The results of characterization by XRD, FT-IR and N2 adsorption-desorption showed that the catalyst Co-Al-MCM-41 has the same structure mesopori material MCM-41 is marked by the emergence of characteristic peaks difractogram at 1.8-2.4 ° 2 approximately, 3.5 -4.12 °, 4.31-4.82 °, and 5.64-6.00 °, and the pore size distribution between 30.49-34.09 Å, has a hexagonal shape and uniform particle morphology with average size 1 m. Results desorption nitrogen absorption analysis showed the surface area decreased with the growing amount of Co loading. Catalytic activity of Al-MCM-41 and Co-Al-MCM-41 at cyclization cytronelal reaction influenced by the nature of the acidity of the catalyst, which catalyst has a number of the more Lewis acid and Bronsted acid side has less active and selective nature of the cyclization reaction cytronelal be isopulegol. The highest activity of 81.30% and the highest selectivity of 75.10% for isopulegol shown by the catalyst Co-Al-MCM-41(20) in the solvent toluene.
SIFAT ANTIKAPANG EKSTRAK ZAT WARNA BUNGA KNOP (Gomphrena globosa L) Miksusanti, ; Setiawaty Yusuf,
Matematika dan Sains Vol 18, No 2 (2011)
Publisher : Matematika dan Sains

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Abstract

The aims of research was to study the color subtance of knop flower as antifungi. It was extracted by maceration using ethanol solvent. Antifungi assay against Aspergillus flavus and Aspergillus niger was conducted using contact method. Results of research showed that adding of color substance of knop flower extract of 30% decreased cell mass of A. flavus of 47.22% and A. niger of 25%. The MIC value were 45% for A. Flavus and 48% for A. niger.

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