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Fatimatuz Zuhro, Hasni Ummul Hasanah, Sukadi Sukadi
Published: 31 May 2017
Jurnal ILMU DASAR, Volume 18; https://doi.org/10.19184/jid.v18i1.2115

Abstract:
Redpalm isornamentplantwhichpotentiallytobecultured.Thescarcityofredpalmmadeithashighmarket value and need to be preserved. However, the germination growth of red palm is slower than other kinds of palm, so the best way to germinate the red palm seed is needed. The aim of this research is to determine the effect of apliccation some young coconut water concentration and kascing fertilizer to red palm seed germination. The research used factorial completely randomized design with 5 replication, the first factor is young coconut water concentration (0%, 25%, 50%, 75%, and 100%) and the second factor is germination media (steril sand and kascing fertilizer). Variables measured were live germination percentage, speed germination rate, radicula length, and plumula height. Results of this study showed that the best germination media is steril sand and 0% concentration of young coconut water.
I Nyoman Adi Winata, Achmad Sjaifullah, Dita J. Cahyani, Woro D. Ayu
Published: 16 May 2017
Jurnal ILMU DASAR, Volume 18; https://doi.org/10.19184/jid.v18i1.3110

Abstract:
Onoceranoide type of triterpene was isolated from leaf of langsep (Lansium domesticum Corr.) Isolation is conducted by vacuum and flash column chromatography technics with Silika Gel 60 F, Silika Gel 60 (70-230 mesh), and Sephadex LH-20 powder as stationery phase and mixture of dichloromethane, methanol, ethyl acetate as mobile phase. The structure was identified by Infrared and NMR spectroscopy. It has moderate insecticidal activity to Spodoptera littura larvae with LC50 13,6 ppm.
Sri Ratnawati, Kusno Kusno, Ahmad Kamsyakawuni
Published: 27 January 2017
Jurnal ILMU DASAR, Volume 18; https://doi.org/10.19184/jid.v18i1.2415

Abstract:
Mathematics as a basic science has objects that are abstract, mathematical aimed at understanding the concept by providing the ability to reason logically, systematically, critical, careful and creative so that if the mathematics are taught using the book will be hard to accept students. Junior high school students in general are still difficulties in learning mathematics in particular on the material loop. Therefore, it needs the development of more interactive learning media and can help students in the learning process, one of them with the help of Software Graphic User Interface (GUI) Matlab. The concept of a circle is presented in the form of Software GUI Matlab so that students can use to understand the concepts of geometry with ease and be more independent, and help teachers to explain the concept of the circle in the learning process. The application of the concept of the circle in Matlab GUI Software is done by constructing a circle 1. Concept definition, 2. Elements of the circle, 3. The corners of the circle, 4. Relationships angle at the center of the circle and the angle of the circle, and 5. Nature tangent to the circle . Data construction concept of one to five are arranged in Matlab GUI program to produce instructional media in the form of software.
Rifan Acik, Sudarmadji Sudarmadji
Published: 5 June 2017
Jurnal ILMU DASAR, Volume 18; https://doi.org/10.19184/jid.v18i1.2753

Abstract:
The Mangrove ecosystem has benefits, one of them as the buffer ecosystem. This research has purpose to know the relationship between community structure of Mangrove and the ecologycal factor in Pangpang bay, Alas Purwo National Park. The result from this research are Rhizophora apiculata has highiest INP is 96,44, Sonneratia alba has lowest INP is 35,47. Dominance indeks had by Ceciops tagal is 4,70. Diversity indeks of stiks Mangroves shown low value with Shanon Weiner (H')
Bagus Setiawan, Didik Sulistyanto, Kartika Senjarini
Published: 31 January 2017
Jurnal ILMU DASAR, Volume 18; https://doi.org/10.19184/jid.v18i1.2723

Abstract:
This study aims to identify entomopathogenic nematodes symbiotic bacteria phenotypically and based on the gene encoding 16S rRNA sequences. Bacterial symbionts of entomopathogenic nematodes, obtained from isolates from the area Wonokerto (WN01) and isolates Sukapura (SP01), Bromo, Probolinggo, two symbiont bacteria was found in entomopathogenic nematodes Steinernema sp. The method used in this study are: the isolation of entomopathogenic nematodes Steinernema sp. and bacterial symbionts conventionally for the identification of phenotypically, after the characterization of bacterial isolates, the isolation of genomic DNA, 16S rRNA PCR, DNA purification and DNA sequence analysis. The results based on phenotypic characterization showed that isolates WN01 and SP01, yellowish white, gram positive, negative bioluminenscene, catalase positive, can not hydrolyze urea, and also can not produce H2S. The results of the gene encoding 16S rRNA sequence can be deduced WN01 isolates have in common with the bacteria Bacillus strain toyonensis BCT 7112, while the SP01 isolates have in common with the bacteria Bacillus strain cereus ATCC 14 579.
Yuni Kartika Dewi, Hari Purnomo, Sudarmadji Sudarmadji
Published: 31 January 2017
Jurnal ILMU DASAR, Volume 18; https://doi.org/10.19184/jid.v18i1.2354

Abstract:
This research was conducted in the mangrove forest of Popongan beach at Baluran National Park, East Java. The aim of this research was to determine the relationship between mangrove density and Portunidae diversity in mangrove forest at Popongan beach. Line transect method was used in this research. There are three transects consist of 17 plots, each plot sized 20m x 20m. The data analysis were done by using Person correlation and linear regression R Program. The results showed p-value 0,003, it means there is relationship between Portunidae diversity and the mangrove density. The temperature and tide showed p-value < 0,005, that means the abiotic factors affect Portunidae diversity in mangrove. The Portunidae diversity at mangrove forest of Popongan beach is relatively low (H’value 0,152). There were five species was found, there were Charybdis (Charybdis) miles, Podhopthalmus vigil, Portunuspelagicus,Scyllaserrata,and Thalamita crenata. The dominant species in this mangrove forest is Thalamita crenata. The composition of mangrove forest vegetation were Rhizophora apiculata, Ceriops tagal, Lumnitzera racemosa, Rhizophora stylosa, Sonneratia alba, Bruguiera gymnorrhiza, Pemphis acidula, dan Xylocarpus moluccensis. The dominant vegetation in this mangrove forest is Rhizophora apiculata.
Husnul Hotimah, Purwatiningsih Purwatiningsih, Kartika Senjarini
Published: 1 February 2017
Jurnal ILMU DASAR, Volume 18, pp 55-60; https://doi.org/10.19184/jid.v18i1.3113

Abstract:
Drosophila melanogaster is one of the insects which have a very important role in the development of the genetic science. Drosophila melanogaster have many mutation, recently there are many mutant such as sepia and plum strain. Morgan et al have found 85 strain mutan of Drosophila melanogaster. The purpose of these research was to characterize of morphological from the head, thorax, and abdomen. The result show that the morphological of Drosophilla melanogaster wild type, sepia and plum mutant have many similarities. The difference of them are the eyes color, Drosophila melanogaster wild type has red eye, sepia strain has a dark brown eye and plum has a dark purple eye.
Maisaro Maisaro, Bambang Sugiharto, Parawita Dewanti
Published: 31 January 2017
Jurnal ILMU DASAR, Volume 18; https://doi.org/10.19184/jid.v18i1.1762

Abstract:
SCMV (Sugarcane Mosaik Virus) is sugarcane crop disease resulting in chlorosis in leaves with the formation of the colors yellow and green intermittents. Based on survey information obtained that the air observation of all varieties of sugarcane was already stricken with the virus SCMV. Even the most formidable attack is on PS881 varieties with the intensity of the attacks reached 80%, so that it is estimated will lose up to 40% of the harvest. The sugarcane is virus free can be obtained via organogenesis in tissue culture method directly on the apical meristem, somatic embryogenesis at, and also with the addition of khemoterapeutan (acyclovir).The workings of the khemoterapi materials are the chemotherapi will interfere with replication and synthesis of genetic material of the virus but also cause the same effect against the mechanism of synthesis of nuklet acid on plants hosts. This research aims to find the best concentration and exposure time the most good in eliminating viruses SCMV in the apical bud culture of sugarcane PS881, using the antiviral acyclovir in conditions of invitro, so that the resulting plant will be virus free. The methods used to detect the presence of the virus by using the two ways, the first is by serology test through the protein content of the virus / checking nucleic acid virus with ELISA and the second is by RT-PCR. The results of the analysis showed that the interaction between the concentration of chemotherapy and exposure time produces the best treatment in eliminating the virus was . treatment with acyclovirc oncentration of 20 ppm and exposure time of 5 weeks.
Mahful Septiawan, Budayatin Budayatin, Hidayat Teguh Wiyono, Kartika Senjarini
Published: 31 January 2017
Jurnal ILMU DASAR, Volume 18; https://doi.org/10.19184/jid.v18i1.2372

Abstract:
Although malaria had ever been virtually eradicated from Indonesia but currently malaria is recognized as a serious re-emerging threat to public health. This disease is caused by malaria parasite which is transmitted to human host by Anopheles mosquitoes as main vector. It has been widely observed that saliva of mosquito that transmits disease contains several factors that could enhance pathogen infection. Therefore, it should be possible to control pathogen transmission by vaccinating the host against the molecule(s) in saliva that potentiate the infection. However, immunogenic specific component in mosquitoes vectors of Malaria has not yet been identified so far. The objective of this study are to analyze protein profile of SDS-PAGE and to know the immunogity the protein extract of salivary gland from potential vector of Malaria i.e. An. aconitus We used immunogenic reaction between salivary gland extract of these vectors against pool of human sera which were collected from endemic area. The reaction conducted by the dot-blot analyze. SDS-PAGE studies showed 15 major polypeptide bands of 284, 100, 84, 75, 66, 57, 53, 48, 45, 38, 33, 29, 15, 14, and 11 kDa. The dot-blot studies showed that the protein extract of salivary gland from An. aconitus are immunogenic.
Frida Murtinasari, Alfian Futuhul Hadi, Dian Anggraeni
Published: 2 February 2017
Jurnal ILMU DASAR, Volume 18; https://doi.org/10.19184/jid.v18i1.3159

Abstract:
SAE (Small Area Estimation) is often used by researchers, especially statisticians to estimate parameters of a subpopulation which has a small sample size. Empirical Best Linear Unbiased Prediction (EBLUP) is one of the indirect estimation methods in Small Area Estimation. The presence of outliers in the data can not guarantee that these methods yield precise predictions . Robust regression is one approach that is used in the model Small Area Estimation. Robust approach in estimating such a small area known as the Robust Small Area Estimation. Robust Small Area Estimation divided into several approaches. It calls Maximum Likelihood and M- Estimation. From the result, Robust Small Area Estimation with M-Estimation has the smallest RMSE than others. The value is 1473.7 (with outliers) and 1279.6 (without outlier). In addition the research also indicated that REBLUP with M-Estimation more robust to outliers. It causes the RMSE value with EBLUP has five times to be large with only one outlier are included in the data analysis. As for the REBLUP method is relatively more stable RMSE results.
Yeni Maulidah Muflihah, , Tanti Haryati, Kiki Puji Setianingrum
Published: 15 July 2014
Jurnal ILMU DASAR, Volume 13; https://doi.org/10.19184/jid.v13i1.886

Abstract:
The presence of weak acids in solution can be detected using a potentiometric detector. Platinum was used as a working electrode and Ag/AgCl as a reference electrode. Ascorbic, glutamic and aspartic acid were detected by a platinum electrode in a flow potentiometric system. The influence of pH, flow rate and concentration of phosphate buffers asa a carrier were studied and showed an optimum pH for the detection of ascorbic and glutamic acid at pH 6,5 and pH 7,0 for aspartic acid. Phosphate buffer concentration optimum at 1x10-4M and flow rate of 1,00 mL/min. Linear range for ascorbic and glutamic acid at 2,5 x10-4M to 5x10-2M, with a regression coefficient of 0,974 and 0,958, while for aspartic acid 5x10-4M to 5x10-2M with a regression coefficient 0,911. Detection limit for ascorbic and glutamic acids were 5x10-4M and 1x10-3M for aspartic acid. Sensor reproducibility obtained from variation coefficient (Kv). Variation coeffiecient (Kv) of ascorbic acids 1,32-1,69%, glutamic acids 0,69- 1,57% and aspartic acid 0,54- 1,29%.
Puji Astuti, Kusno Kusno
Published: 15 July 2014
Jurnal ILMU DASAR, Volume 13, pp 31-40; https://doi.org/10.19184/jid.v13i1.885

Abstract:
The purpose of study is to obtain procedures of designing several models of rack support and pole component, so that the shape are varies, symmetrical, graded, and balance. The results show that the procedure of designing rack support component can be done by taking some data of a space frame construction of the cube, triangular prism, or cone, then we set a few points on the frame to build piece of parametric curve. Finally we interpolate the curves to find a rack support surfaces. As for the rack pole component, the procedures are: we extract data of straight line segments, oblique or helical shape, then we enumerate the lines into several sub-segments, and then breaks it down to build the trending, chain, and graded curve to get a balance rack pole .
Esti Utarti, Su’Udah Hasanah, Siswanto Siswanto
Published: 15 July 2014
Jurnal ILMU DASAR, Volume 13; https://doi.org/10.19184/jid.v13i1.634

Abstract:
About 28 molds were obtained from rice straw on coastal-field of Watu Ulo Jember, were screened for their cellulolytic activities at pH alkaline. In semiquantitatively screening on CMC and Avicel plate at pH 8 showed that 27 isolates have cellulolytic activities. Based on clearing zone in CMC plate, isolates 7, 9, 14, 19 and 24 have higher cellulase (CMC-ase) activities index at pH alkaline. Further, in quantitatively examination using rice straw in Basic Salt Mandel’s modification medium showed isolate 19 (0,60 U/ml) that identified as Aspergillus terreus have higher FP-ase activity than isolate 7 (0,56 U/ml), 9 (0,55 U/ml), 14 (0,53 U/ml) and 24 (0,56 U/ml).
, Nanda Widayanti, Neran Neran
Published: 15 July 2014
Jurnal ILMU DASAR, Volume 13; https://doi.org/10.19184/jid.v13i1.631

Abstract:
Performance Cellulose acetate (CA) were characterized by the variation of solvent composition (acetone and formic acid) with a mole ratio of 5/10; 6/9; 7/8; 8.7; and 9/6 and the addition of additives MSG 6%. Characterization was conducted on the membrane performance (flux, permeability coefficient,% rejection) and physicochemical properties include density test and analysis of membrane structure by FTIR. Membrane solvent variation results, 6/9 has the lowest density values. Results flux, permeability coefficient and the highest rejection is obtained when the composition of the 9/6. FTIR test results showed no difference between the polymer cellulose acetate cellulose acetate membrane solvent variation results.
Bambang Piluharto, Imam Syafi’I, R. Indahsari, Tanti Haryati
Published: 15 July 2014
Jurnal ILMU DASAR, Volume 13; https://doi.org/10.19184/jid.v13i1.630

Abstract:
Sulfonated polysulfone membrane is one of the alternative membranes as replacing Nafion membrane for the fuel cell application. This membrane was prepared by introducing sulfonic group in the polysulfone structure backbone, so that provides the ionic membrane. However, more ionic groups in the SPSF membrane lead to loss mechanical stability. This study aims to prepare the hybrid membrane from SPSF and bentonite. In here, various of bentonite concentrations were used as variable to study water uptake and ion-exchange capacity properties. As the results, increasing bentonite concentrations lead to increase water uptake and ion-exchange capacity. By the functional group analysis, proved that adding bentonite in SPSF did not change structure of SPSF, means that interaction between SPSF and bentonite were physical interactions.
Tanti Haryati, Novita Andarini, Mellisa Ika Febrianti
Published: 15 July 2014
Jurnal ILMU DASAR, Volume 13; https://doi.org/10.19184/jid.v13i1.625

Abstract:
The incorporation of TiO and ZnO material as a composite, to increase the activity of the catalyst. Synthesis of ZnO-TiO2 thin layer made using a sol-gel method with a variation of PEG as a solvent. The purpose of this research was to investigate the structure and morphology of ZnO-TiO2 thin layer on the variation of PEG as a solvent by sol-gel method . Preparation of ZnO sol of the precursor , while the TiO2 sol synthesized by dissolving the anatase TiO2 structure into polyethilen glycol . Sol of ZnO and TiO2 sol do sol mixing to form ZnO–TiO2 after it coated on a glass substrate and then calcined . Products were then characterized by X-ray diffraction to determine the crystal structure and SEM to determine its morphology . The test results show the crystal structure by XRD based difaktogram intensity , the greater the molecular weight of the PEG peak intensity of ZnO-TiO2 showed the lower. While based on morphological examination , it can be seen that the larger molecular weight PEG , ZnO - TiO2 granular greater.
Achmad Sholikhudin Almu’Minin, Tanti Haryati, Tri Mulyono
Published: 1 February 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i2.2685

Abstract:
TiO2 photocatalyst is one of type semiconductor that is often used in textile dyes photodegradationmethod which characteristics are influenced by the size of crytal. Synthesis of TiO2 photocatalystscan be done by several methods, one using the sol-gel method. By treating variations in thecomposition of the reactans and treatment of synthesis in sol-gel method, the size of the TiO2crystals can be controlled to produced the desired characteristics. This study has been made ofTiO2 photocatalysts in the form of thin-layer films using sol-gel method with annealing process ata temperature of 550oC. This study examines the effect of the concentration of precursor TTIP andhydrolysis ratio of the crystal structure, crystallinity, the band gap energy, and photocatalystactivity to degrade procion red mx-8b dye compound. The result obtained is known that the crystalsynthesized has structure of TiO2 anatase. Value crystal size, crystallinity, the band gap energy,and percent degradation has a value that depends on the composition of TTIP concentration andhydrolysis ratio. Although the results showed morphology of TiO2 particle indivcate that large sizeand crystallinity value is still low, but that is interesting each of the measurement results mutuallysupport each other.Keywords: photocatalyst, TiO2, Sol-gel, TTIP concentration, hydrolysis ratio
Tia Lestari, Achmad Sjaifullah, Agung Budi Santoso
Published: 1 February 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i2.2684

Abstract:
Shrimp waste containing chitin 15-20%. Chitin can be isolated enzymatically by using proteaseenzymes derived from the waste itself. Waste of shrimp marinated in 1M H2SO4 for 10 days at pH1-2 and do control the pH and concentration of N-total every 24 hours. So that, this process canreduce the use of chemicals and environmental pollution. Enzymatic chitin obtained ash content1.789% and 5.322% of N-total. Results of IR showed characteristic functional groups of chitin areOH 3390.5 cm-1, NH (secondary amide) 3348.71 cm-1, C = O 1648.20 cm-1, C-N at 1313.96 cm-1,C-O 1115, 28 cm-1. Chitin is dissolved in 8% NaOH / Urea 4% for 36 hours (-20oC). Hydrogelsmade with a ratio (1: 6); (1: 8); (1:16); (1:24) w / w. The results showed the increasing amount ofacrylamide monomer, the greater the value% graft and absorption of water. Enzymatic chitinhydrogel showed the maximum value % graft is 2492.073%; and water absorption 1.794 g / g. IRhydrogel results indicate primary amide N-H stretching of acrylamide at 3349.77 and 3202.88 cm-1, C = O 1662.03 cm-1Keywords: hydrogel, chitin, acrylamide, graft copolymerization
Damayanti Iskandar, Susy Yunita Prabawati
Published: 1 February 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i2.2683

Abstract:
Acetyl vanillate was synthesized to become an analgesic compound was conducted in two stages.The first stage is oxidation vanillin using Tollens reagent. The result of the oxidation wascharacterized by melting point and FTIR. The second stage, vanillic acid was acetylated usingacetic acid anhydrous under two conditions, that are acid and base using H2SO4 and NaOH 10%,respectively. Two difference products from those processes were characterized using FTIR and1H-NMR. The result of the melting point vanillic acid test showed 204°C and the standard is210°C. Vanilline was successfully oxidized, based on comparison FTIR spectra between vanillineand its precursor that showed no functional group of C-H aldehyde at 2,700-2,800 cm-1. Thecharacteristics FTIR spectra under base conditions showed no absorption of functional group ‒OHthat substituted by an acetyl group. So that, the base catalyst indicated no product of the expectedcompound. The product under acidic compounds have the characteristic yellow crystals with amelting point of 130°C. Characteristics of FTIR showed no width absorption at wave number 3400cm-1 and evidenced by 1H-NMR spectra. Shift peak at 2.342 ppm was an absorption acetylcompounds. It was concluded that acetylation of acetyl vanillate compounds under acidicconditions to produce the expected product.Keywords: vanilin, vanilic acid, acetylation
Umi Sa’adah, Artoto Arkundato, Lutfi Rohman
Published: 1 February 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i2.2690

Abstract:
Molecular dynamics is a popular method to observe the movement of interacting molecules. In this study molecular dynamics method was used to observe the phenomenon of iron corrosion and analyze effect of noble gases as a corrosion inhibitor for iron in liquid metal PbBi. Physical quantities are evaluated from the results of this study including: Mean Square Displacement (MSD), the diffusion coefficient, and for the crystal structure is visualized using Ovito program. The ron is placed in the middle high temperature liquid PbBi, the noble gases is injected into the liquid metal. Based on the three kinds of the noble gases (helium, neon, and argon) thhat injected into the molten metal PbBi, it obtained that Argon is the most effective in inhibiting the corrosion of iron. Argon is able to reduce the corrosion rate of 80.29% iron for temperature of 1023K. One reason to use the noble gas because these gases are difficult to react with other elements. Keywords: Molecular Dynamics, Corrosion in Liquid metals, Nobel Gases, Inhibitors
Rahmat Gunawan, Cynthia Linaya Radiman, Muhamad Abdulkadir Martoprawiro, Hermawan K. Dipojono
Published: 1 February 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i2.3499

Abstract:
The Hydrogen storage based-graphite materials have been investigated theoretically via Density Functional Theory (DFT) approach. The native graphite was compared to the modified graphite, namely the intercalation graphite (GICs, graphite intercalated compounds). Here the GICs was intercalated by alkali metals (Li, Na and K). The electronic structures, energetics and atomic orbital contributions of hydrogen-graphite system, GICs, and hydrogen-GICs were studied by calculation approach of gradient corrected PBE (Perdew-Burke-Ernzerhof) for recovery of exchange-correlation energy. The calculation was supported by using basis set of the plane waves whereas the computation of electron-core by using Ultrasoft Vanderbilt pseudopotential. The computational calculation provides four main studies i.e. molecular geometry relaxation, determination of electronic bands structure of energy, energy state density (DOS) and atomic orbital contribution by charge density differences.Keywords: Density Functional Theory, hydrogen gas, graphite intercalated material
Erlaningtias Hutami Ardana Putri, Dwi Fungky Ratnasari, Anugerah Dewi Harumsari, Vivid Ayu Lestari, Sri Wardhani
Published: 1 February 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i2.3500

Abstract:
The sludge from sidoarjo have high Fe2O3 content of about 62,19%. This content have potential to prepare as photocatalyst for degraded fermented soybean waste by support sunlight. Synthesis of Fe2O3 zeolit-chitosan photocatalyst was carried out by impregnation into zeolite. Adding chitosan into the mixture of Fe2O3 zeolite then cast to be granules. Characterization of photocatalyst obtained using spectrophotometer IR, XRD, and DRS. Microball photocatalyst of Fe2O3 zeolit-chitosan with variation of pH 4, 6, and 8 then were done test of degradation performance by sunlight during 4 hours. As the result, the optimum pH of photocatalyast via COD test is pH 8. The higher base of photocatalyst, decreasing of degradation is higher.Keywords: degradation, Fe2O3, fermented soybean waste, sludge.
Reni Agustiani, Puguh Hiskiawan, Rano Rano
Published: 1 February 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i2.2689

Abstract:
It has been performed data interpretation of 3D seismic data and drilling field exploration wellsBasin Nova ScotiaKanada to know structure fault on the field Missisauga Formation. Seismic dataused is 601 inline, crossline 482, and the data used drilling wells are two wells which there is a loggamma ray, sonic logs and log RHOB. Interpretation is done the analysis of the map in thestructure of time and analysis of seismic attribute maps based on the geometrical attribute serves todetermine their structure or structural faults of the data volume 3D. Based on the time structuremap well known that first well is in the region heights and second wells is in low region. Based oninterpretation of the map attributes known three faults are two major fault and one minor fault.Two faults are in the East Sea drilling wells and a small fracture that was on its western side. Thethree fults are directed from Northwest to the Southeast. Fault is expected to serve as ahydrocarbon trap in the area that will be accumulated in drilling wells.Keywords: geometrical attribute, Seismic data, drilling wells, time structure map.
Ahmad Asrori Nahrun, B. Anggit Wicaksono, Ismail Ismail, Nuryani Nuryani, Budi Purnama
Published: 1 February 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i2.2688

Abstract:
Demonstration performance magneto - impedance sensor on the coil wire multilayer [ Ni80Fe20/Cu ]N electro - deposition results presented in this paper . At first multilayer [ Ni80Fe20/Cu ]N deposited on a Cu wire into a coil and then the sample is modified by the number of windings 2 and 4. The results of impedance measurements under the influence of the magnetic field shows that the magneto - impedance ratio increases with the increase in the number of windings. Magneto - impedance ratio changed from 15 % to 17.4% with a change in the number of windings of 2 to 4. The fact these results allegedly contributed their self-inductance value of this magnitude greater contribution to the increase in the number of windings.Keywords: Magneto - impedance sensor, electro-deposition , multilayer coils [Ni80Fe20/Cu]N
Siti Rofiqoh, Dwi Indarti, Bambang Piluharto
Published: 1 February 2017
Jurnal ILMU DASAR, Volume 17, pp 83-86; https://doi.org/10.19184/jid.v17i2.2687

Abstract:
The aim of recearch is study the effect of MSG in coagulation basin on cellulose acetat membranes properties. It was preparated by phase inversion technique. As the result showed that the higher the concentration of MSG in coagulation basin, which is character of membrane permeability coefficients and lower water flux. Dextran rejection of 11, 40, 100-200, and 500 kDa increased. The morphology analysis has shown that sub layer membranes structure with 2% MSG addition more uniform than 0,5% MSG addition.Keywords: cellulose acetat, phase inversion, MSG, coagulation basin
Nuriman Nuriman
Published: 1 February 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i2.2686

Abstract:
Ring-opening reaction of cyclic pentose sugar derivatives of 2,3,4-Tri-O-benzyl- D-xylopyranoseto derivatives of acyclic 2,3,4-Tri-O-benzyl-D-xylose-Dipropyl dithioacetal been done andoptimized. The reaction was performed using a precursor propanathiol with concentrated HCl.Optimization of reaction conditions was conducted by varying propanathiol concentration,reaction time and optimization of the reaction temperature which the product ioslation conductedusing a variety of solvents. The results of this reaction was obtained 2,3,4-Tri-O-benzyl- Dxylose-Dipropyl dithioacetal with the highest randemen (97%), better than the previous reactionthrough propanathiol excessive concentration, reaction time of 2 hours and the temperature of thereaction at room temperature. Product Isolations using solvent dikloromathane more effectivethan the use of other organic solvents. Purification of reaction products is done through a columnchromatography using a solvent mixture of 20% ethyl acetate-hexane.Keywords: Optimization, Cyclic Ring, Dithioasetalisasi
Bambang Piluharto, Achmad Sjaifullah, Istiqomah Rahmawati, Maryanto Maryanto
Published: 8 January 2013
Jurnal ILMU DASAR, Volume 14; https://doi.org/10.19184/jid.v14i1.480

Abstract:
In the separation process of solution containing protein, interaction between membrane surface and protein can cause fouling irreversibely. So, efficiency of filtration process will decline. In this research, to improve the effeciency of filtration was done by modification of membrane using UV-photografting technique. Acrylic acid had been introduced topolysulphone membrane via this technique. The hydrophylic membrane was obtained. The membrane performance was evaluated in soymilk fouling test. The first step of research had obtained PSF membrane optimation about PSF 18%. In second step, the research was focused on the modification and characterization of PSF membrane by UV-Fotografting tehchnique. In this technique, monomer concentration and radiation time was used as variable. As the result, PSF membrane had been modificated succesfully by UV- photografting tehchnique with optimum condition in 15 minutes time radiation and concentration of acrylic acid 5%. Performance of modified membranes (flux and permselectivity) were better than unmodified membranes. The fouling test showed that the modified membranes have reduced fouling degree significantly. Keywords : Ultrafiltration membrane, UV-photografting, flux and permselectivity, fouling
Fitri Rizqi Azizah, Puguh Hiskiawan, Sri Hartanto
Published: 24 January 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i1.2663

Abstract:
Oil and natural gas as a fossil fuel that is essential for human civilization, and included in nonrenewable energy, making this energy source is not easy for updated availability. So that it is necessary for exploration and exploitation reliable implementation. Seismic exploration becomes the method most widely applied in the oil, in particular reflection seismic exploration. Data wells (depth domain) and seismic data (time domain) of reflection seismic survey provides information wellbore within the timescale. As for the good interpretation needed information about the state of the earth and is able to accurately describe the actual situation (scale depth). Conversion time domain into the depth domain into things that need to be done in generating qualified exploration map. Method of time-depth curve to be the method most preferred by the geophysical interpreter, in addition to a fairly short turnaround times, also do not require a large budget. Through data information check-shot consisting of the well data and seismic data, which is then exchanged plotted, forming a curve time-depth curve, has been able to produce a map domain depth fairly reliable based on the validation value obtained in the range of 54 - 176m difference compared to the time domain maps previously generated.Keywords: Energy nonrenewable, survei seismik, peta domain waktu, peta domain kedalaman, time-depth curve
S. Sujito, Hanim Munawaroh, Endhah Purwandari
Published: 16 July 2014
Jurnal ILMU DASAR, Volume 14; https://doi.org/10.19184/jid.v14i2.513

Abstract:
Development of biocomposite materials based on natural fibers and environmentally friendly resins to replace composite materials made from plastic and synthetic fibers give the consideration that the biocomposite materials are environmentally friendly materials. In this paper, we discuss the synthesis and characterization of biocomposite materials using a combination of thin sheets of bamboo reinforcement and resin sengon and poly lactic acid (PLA). As controls were also carried out the synthesis and characterization of biocomposite material with a thin layer of reinforcement only sengon bamboo and wood. Characterization of tensile strength and modulus of elasticity of the material is done by using the Tensile Test Machine ASTM D 638. In the mean time, biodegradability of materials are observed made by the method of burial for 1-4 weeks. Tensile test results show that the biocomposite material reinforced with a thin sheet bamboo has a tensile strength and modulus of elasticity greater than that of the other biocomposite materials produced in this study. Meanwhile, biocomposite materials with thin layers of wood sengon reinforced easily biodegradable (dG = 13.21 ± 0.59)%, compared to a biocomposite material with a thin layer of bamboo reinforcement (dG = 10.69 ± 0.79)%. From these results it can be concluded that the composite material with a thin layer of bamboo boosters are more likely to be applied to replace metallic materials.Keywords: Biocomposites, tensile strength, elastic modulus, biodegradability, bamboo and sengon wood thin layer.
Published: 12 June 2015
Jurnal ILMU DASAR, Volume 15; https://doi.org/10.19184/jid.v15i2.1405

Abstract:
Well Log method is one of the geophysics methods used to examine rock structure under earth surface. This research is studied by using utilizing influence of the gamma ray to physical parameter on well log measurement. This research is explained to compare the measuring data with some physical parameters. The results shown that the rock density was about 2.00 – 2.50 g/cc, the rock porosity was round 2.00 – 2.50 g/cc, whereas the resistivity has 2 Ωm to 60 Ωm. All those vaiables were measured at same depth 3420 – 3470 ft. Furthermore, the self potential value was the highest negatively. The result from physical parameter provided meaning about anomaly positively of hydrocarbon existing.Keywords: Well Log, gamma ray, hydrocarbon
Ery Fatarina P, Mega Kasmiyatun, Mf. Sri Mulyaningsih, T. Da Silva
Published: 24 January 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i1.2671

Abstract:
Silkworm pupa is byproducts of silkworm farms are not fully utilized. This study aims to assess the potential silkworm waste as a raw material surfactant "biodegradable". Silk pupa oil has 43.70% triglyceride. The characterisation by the spectra FTIR showed the degradation results in wavelength 1050-1300 cm-1 and 1690-1760 cm-1 indicated the consecutive C‒O and C=O group of alcohol/ether/carboxylic acids/esters, and the wave number 2500-2700 cm-1 indicated the presence of O‒H groups of the carboxylic acid with hydrogen bonds. GC-MS analysis showed the components of palmitic acid β-monogliseride, α-monopalmitin, palmitic chloride acid, oleic acid, linoleic acid chloride. FTIR spectra degradation products Mono-diglyceride provide distinctive peaks that appear at wavelength 1041.56 cm-1 and 3659.61 cm-1 that showed group C-OH and OH, respectively. The performance test results of surfactant to the benzene-water system showed no effect of surfactant that is as an emulsifier. Silk pupa oil contains components that can be converted into a biodegradable surfactant. Keywords: silkworm pupa, surfactant, glycerolysis, monoglyceride
Fuad Bahrul Ulum, Dwi Setyati
Published: 16 June 2015
Jurnal ILMU DASAR, Volume 16; https://doi.org/10.19184/jid.v16i1.1486

Abstract:
An investigation of epiphytic Pteridophytes diversity at Mount Raung, Banyuwangi, East Java Province, Indonesia, was carried out in 7 February 2015. As many as 11 Pteridophytes from 3 families had been identified based on their morphological chracteristic. Among them, four species of Family Aspleniaceae, including Asplenium confusum Tardieu & Ching, Asplenium nidus L., Asplenium salignum Blume, and Asplenium tenerumoides S.B.Andrews. Polypodiaceae include Leptochilus wrightii (Hooker & Baker) X. C. Zhang, Microsorum punctatum (L.) Copel., Pyrrosia bicolor ( Kaulf. ) Ching, and Schellolepis percussa (Cav.) Pic.Serm. Vittariaceae include Antrophyum formosanum Hieron., Vittaria ensiformis Sw., and Vittaria lineata (L.) Sm. which is the smallest specimen with less than 10 cm long.Keywords: Mount Raung, Pteridophyta, Epiphytic, Families.
Rina Utami, Yanti Yulianti
Published: 3 January 2013
Jurnal ILMU DASAR, Volume 14; https://doi.org/10.19184/jid.v14i1.474

Abstract:
The research of desain of super critical water reactor (SCWR) thorium fuel has been done. The objective of this research is to obtain the design with high thermal power and inherent safety features. The analyzed parameters were:corefuelenrichment,reactorsize,criticality,andpowerdensitydistribution.Acorecalculationof x,y,z was achieved by CITATION code. Fuel composition and core configurations in critical condition were calculated by variation of fuel enrichment, reactor size and configuration of the fuel in the core. SCWR used thorium as fuel, stainless steel as cladding, light water as moderator and coolant as well. This research obtained critical core design that is size x = 85 cm, y = 85 cm and z = 180 cm. The critical condition can be achieved when the inner fuel loaded about 2.23% fuel enrichment and outer fuel 1.5% fuel encrichmant. The design produced 1000 MW thermal power, the maximum power density is 625.675 Watts /cc and k-effective value is 1.000274. Thereactorcoreinthisresearchfulfillstheinherentsafetystandardintermofneutronicaspect. Keywords : Core design, SCWR, thorium, power density, passive safety
Arya Mahdi, Hidayat Teguh Wiyono, Suratno Suratno
Published: 16 July 2014
Jurnal ILMU DASAR, Volume 14; https://doi.org/10.19184/jid.v14i2.641

Abstract:
Relationship can be seen from the similarity of the cow and bull. One method to find out about the phylogenetic relationship between species is by using cranial morphometry (craniometrics). The purpose of this research was to identify morphological cranium Bali cattle , banteng baluran , and banteng merubetiri based on the parameters measured .This research was conducted in August and ending in October 2013 , held at the National Park Baluran and Merubetiri National Park. The design of this research is descriptive quantitative research , using data analysis kalster ( cluster analysis). Parameters of this research using 15 indicators that have been established in accordance with the research Hayashi , 1982. Materials used in this study are adult male cranium Bali cattle obtained from abattoir ( Slaughterhouse ) Denpasar in January to July 2013 a total of six specimens . Cranium of an adult male bull that used a total of six specimens . Five specimens were collected from the National Park consisting Baluran ( two cranium that is banteng baluran 4 and 5 in 1992 ) and the ( three cranium is banteng baluran1, banteng baluran 2 , and banteng baluran 3 in the 2012-2013 ) . Cranium specimen obtained from the sixth bull collection Merubetiri National Park . Measuring instruments used in this study is the large calipers with a precision level of 0.01 cm . The results of this study showed that the cranium cluster of Bali cattle with coefficient range of 0.016 to 0.042 in contrast to the first cluster is bull cranium specimen glaze 1 bull , bull glaze 2 , 3 baluran bull , and the bull merubetiri 1 , with a coefficient value of 0.047 to 0.161 range . Bali cattle cranium differ significantly with cluster cranium second bull is a bull glaze glaze glaze bull 4 and 5 with the coefficient of 0.162 to 0.251 range. Merubetiri bull glaze and form two clusters , the first cluster bull bull glaze consisting of 1 , 2 bull glaze , glaze bull bull merubetiri 3 and 1 , while the second consists of a cluster bull bull bull glaze glaze 4 and 5 . Turns bull glaze specimens collected in 1992 in contrast to the bull glaze specimens collected in 2012 and 2013. Bull glaze specimens collected in 2012 and 2013, closer to the bull merubetiri specimens . And the bull specimens closer distance coefficient with Bali cattle. The conclusion of this study is the overall specimen Bali cattle entered in a cluster , different from the first cluster and cluster bull bull both . The first cluster by cluster bull bull both are in different clusters. Keywords: cluster analysis , relationship , craniometric , bali cattle and banteng.
Triana Lindriati, Yhulia Praptiningsih, Dwi Fatma Wijayanti
Published: 26 July 2014
Jurnal ILMU DASAR, Volume 15; https://doi.org/10.19184/jid.v15i1.614

Abstract:
Gelation from casein and tapioca take place in the edible film making. An interaction of carbohydrate and protein in the formation of gel could be affect on the physical properties of edible film gel. An appropriate ratio of casein-tapioca and pH was expected to produce physical characteristics of edible film gel. The aims of this research were to know the influence of casein- tapioca ratio, pH and the interaction of casein-tapioca ratio and pH to produce edible film gel. The research was conducted by randomized completely block design with two factors. The first factor was casein-tapioca ratio (0:100; 20:80; 40:60; 60:40; 80:20; 100:0) and the second factor was pH (4; 7; 9). The parameter of observation were colour (lightness and chroma), moisture content, WHC, precipitation and viscosity of edible film gel. The data analysis uses minitab V.1.6 carried on Tukey test. The result shows that casein-tapioca ratio influenced on colour (lightness and chroma), moisture content, WHC, precipitation and viscosity of edible film gel. The treatment of pH influenced on colour (lightness and chroma), moisture content, WHC and precipitation of edible film gel. An interaction between the ratio of casein-tapioca and pH influenced on colour (lightness and chroma), moisture content, WHC and precipitation of edible film gel. Keywords: Edible film gel, interaction of carbohydrate-protein, physical characteristics
Sochif Prasetiya, Mohammad Hasan, Kiswara Agung Santoso
Published: 7 March 2015
Jurnal ILMU DASAR, Volume 15; https://doi.org/10.19184/jid.v15i2.524

Abstract:
Data security is very important data needed to stay awake in strict confidence from hacker intrusion or criminals who want to steal the data. Data security methods that are used in this paper is a digital image encryption by using a modified Hill’s code which is done by changing the way of encryption. If we are using Hill’s code then matrix pixel multiplied is the key matrix while on the modification Hill’s code before the key matrix then the matrix is multiplied pixels must be added to the results of the main diagonal elements of the matrix times key. The results obtained in the process of digital image encoding indicating that the image is encoded with password modification results of modified Hill's code more mixed reviews when compared to the image that was encoded with password Hill so that more effective in securing data in the form of a digital image. The size of the image file using the encoding results in a modification password Hill is smaller than ordinary password Hill with a percentage decrease of 4.6 % so more ease in delivery through electronic media Keyword: Digital image, modified Hill code, encryption, description
Yeni M. Muflihah, Buchari Buchari
Published: 7 January 2013
Jurnal ILMU DASAR, Volume 14; https://doi.org/10.19184/jid.v14i1.482

Abstract:
Preliminary study of preparation reference material for trigonelline determination in green coffee beans have been performed by HPTLC method. Physical characterization performed on green coffee beans include the determination of moisture content, ash content and metal content. Water content values obtained on average 6.4% (%RSD 4.8) and ash content 3.9% (%RSD 16.2). Metal determination (Cu, Zn, Fe) with atomic absorption spectrometry method found Cu 9.4 (mg/kg), Zn 12,0 (mg/kg) and Fe 64.0 (mg /kg). Sonication as extraction method using methanol solvent for 30 minutes and separation method HPTLC on aluminum plates coated with silica gel 60 F254. Eluent used was mixture of n-propanol: methanol: water (4:1:4, v/v/v) with elution length 8 cm. Linear regression obtained in concentration range 200-1200 ng spot-1 with R2 = 0.9857. Detection limits obtained 140.7 ng and 468.9 ng for quantitation limit. Repeatability was achieved from 800 ng spot-1 (% RSD 13.8). Keywords : Reference material, Trigonelline, green coffee, HPTLC
Mohamad Ali Shafii
Published: 4 December 2013
Jurnal ILMU DASAR, Volume 14; https://doi.org/10.19184/jid.v14i2.320

Abstract:
A few numerical methods that usually used to solve neutron transport equation in nuclear reactor are SN dan PN method, Monte Carlo, Collision Probability and Methods of Characteristics . First two methods have been developed using diffusion approach, and last three methods suitable are applicated for transport approximation. Those of three methods have important role in the desain of nuclear reactors. In addition to follow the development of advanced reactor designs, the three methods were chosen because they do not use diffusion approach these are more accurate methods, as well as less need considerable computer memory. Of all the existing methods, the CP method has several advantages among the others. Keywords : Neutron transport, SN, PN, CP, MOC, MC
Muhammad Nadjib, Ratna Ediati, Yudi Aris Sulistiyo, Lutfiatun Nadifah
Published: 24 January 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i1.2674

Abstract:
Synthesis of ZIF-8 (zeolitic Imidazolate Frameworks-8) have been successfully carried out by the reaction of zinc nitrate and 2-methylimidazolate in DMF (N'N-dimethylformamide) solvent at a temperature of 120 °C for 24 hours. Synthesis of ZIF-8 has been conducted five times with variations molar ratio of metal (Zn2+):ligand (MeIM) consecutive 1:1; 1:1.5; 1:2; 1:2.5 and 1:3 to study the influence of metal-ligand ratio of the crystallinity and morphology of ZIF-8 that was produced. The results of characterization by X-ray diffraction, FTIR and SEM show that ZIF-8 is synthesized with a ratio of metal: ligand = 1:2 showed the highest crystallinity and has the most irregular surface morphology with form box. Keywords: ZIF-8, solvotermal, metal/ligand ratio
Ali Murtodo, Dwi Setyati
Published: 13 August 2015
Jurnal ILMU DASAR, Volume 15, pp 115-121; https://doi.org/10.19184/jid.v15i2.1406

Abstract:
Antirogo is a sub-district of Jember district, it's surrounding citizen utilize bamboo for daily needs such as building materials, agricultural equipment, bridges, vegetables and crafts. The continuous utilization is not accompanied by efforts of cultivating so that will have impacts on a population decline and preservation of them. Then it needs to do an inventory of bamboo in Antirogo. This research was conducted on March to September in 4 villages (Krajan, Trogowetan, Pelinggian, and Jambuan) used the exploration method. The results showed that 11 species of bamboo which consists of 4 genus (Bambusa, Dendrocalamus, Gigantochloa, and Schizostachyum) i.e. Bambusa blumeana Bl. ex Schult., Bambusa maculata Widjaja, Bambusa vulgaris Schard. ex J.C., Bambusa vulgaris var. striata (Lodd. ex Lindl.), Dendrocalamus asper Backer, Gigantochloa apus Kurz, Gigantochloa atter (Hassk.) Kurz ex Munro, Gigantochloa sp., Gigantochloa pseudoarundinacea (Steud.) Widjaja, Schizostachyum silicatum Widjaja, dan Schizostachyum zollingeri Steud. Keywords: Antirogo, Bamboo, Inventory, Poaceae.
Ika Dewi Kusumaningtyas, , Eva Tyas Utami
Published: 21 February 2015
Jurnal ILMU DASAR, Volume 15; https://doi.org/10.19184/jid.v15i2.813

Abstract:
The objectives of this study were to observe effect and the effective dose of cinnamon (Cinnamomum burmanii) aqueous extract on pancreas structure of strain Balb-C mice (Mus musculus) diabetic after alloxan exposure. A total of 30 strains Balb-C mice (Mus musculus L.) were divided into 5 groups. Negative control group was not induced by alloxan and a positive control group was induced alloxan 0,15 mg/g bw intraperitoneally for 9 days. The treatment group was divided into 3 groups was induced alloxan 0,15 mg/g bw and given an aqueous extract of cinnamon at a dose of 0,73 mg/g bw; 1,09 mg/g bw and 1,45 mg/g bw orally for 7 days. Mice were dissected pancreas histhological taken using paraffin method and Haematoxylin-eosin (HE) stain. The result showed giving aqueous extract of cinnamon gave a strong effect in the repairing of pancreas structure after giving the alloxsan and the most effective aqueouse xtract of cinnamon with dose of 0,73 mg/g bb was able to repair the structure of mice's pancreas after giving the alloxan. Keywords: Cinnamon, pancreas structur,diabetic mice
La Ode Ahmad Nur Ramadhan, Amiruddin Amiruddin
Published: 5 January 2013
Jurnal ILMU DASAR, Volume 14; https://doi.org/10.19184/jid.v14i1.473

Abstract:
Study on photodegradation of diazinon pesticide in suspension of TiO2 under ultra violet (UV) illumination was conducted. The aims of study are to determine the effective mass of titanium dioxide (TiO2), the effect of catalyst in initial concentration, the half time, the rate constant, and the rate of degradation reaction. Experimental photocatalytic reactor model was designed and constructed as suspension reactor. Determination of the effective mass of TiO2, the concentration of diazinon residu was performed by HPLC . The concentrations of illuminated diazinon solution were colected as various effective mass of TiO2 and expressed as the concentration vs the mass of TiO2. The mass of TiO2 in minimum diazinon concentration was a the effective mass. The concentration of illuminated diazinon and illumination time relationships was expressed in the graph as ln C/C0 = - k t and regarded as a pseudo first-order. The half time, the rate constant, and the degradation rate was analyzed from the graph. The results show that the photocatalytic degradation of pesticide diazinon by using TiO2 under UV illumination was run effectively in the mass of 12.5 mg for the diazinon concentration of 25 mg/l. The decreasing of initial concentration of diazinon is 90.4 % in 120 minutes. The half time, the rate constant, and the degradation rate are 36,869 minute, 0.0188 /minute, and 0,470 mg/l minute, respectively. Keywords : Kinetic, degradation, diazinon, TiO2
Vianda Nuning Fitriani, Kosala Dwidja Purnomo
Published: 16 July 2014
Jurnal ILMU DASAR, Volume 14; https://doi.org/10.19184/jid.v14i2.514

Abstract:
Ensemble Kalman Filter (EnKF) can be applied for linear or nonlinear models. This paper is aimed to estimate the logistic growth of population models using EnKF. The estimation will be compared with the analytical solution. We assume that we can find the analytical solution of the models. The models is in the specific form i.e comparison between the population growth rate and the amount of population is in the parabolic form. The good estimation will be attained by choosing 100 as size of ensembles in EnKF. The result of estimation really so closed to the analytical solution. Keywords : Analytical solution, EnKF, ensemble
Purwatiningsih Purwatiningsih, I Nyoman Adi Winata
Published: 4 January 2013
Jurnal ILMU DASAR, Volume 14; https://doi.org/10.19184/jid.v14i1.475

Abstract:
The different fraction extracts (viz methanol, dichlorometana, n-hexane, ethylacetate, and aceton) obtained from leaves of Aglaia ganggo Miq were investigated for antifeedant activity against Spodoptera litura. All extract fractions showed antifeedant activity with aceton fraction exhibited the highest antifeedant activity at 1 ppm concentration. Only hexane fraction showed a dose dependent concentration while the other fractions exhibited the opposite respond.Keywords : Antifeedant, Aglaia ganggo, extract, fraction
Riya Wulan Afrely, Moh. Imron Rosyidi, Susantin Fajariyah
Published: 22 June 2015
Jurnal ILMU DASAR, Volume 16; https://doi.org/10.19184/jid.v16i1.1390

Abstract:
Holothurioidea well known as Sea Cucumber is one of the classes from the Echinodermata phylum. Sea cucumbers are benthic animals that move slowly. Currently they already identified about 1135 species. Their existence usually associated with abiotic factors such as water salinity, temperature, pH, wave motion, light intensity and the substrate. The ability of the Holothurioidea to adapt to the abiotic factors will affect species diversity. The research aims is to determine the species diversity in the intertidal zone at Pancur Shore of the Alas Purwo National Park. It includes the species composition, species diversity index and the index of equality The study was conducted on 14th-21st of June 2014, by using systematic plotting transect method. The results found: one order, one family, two generas and eight species. The Species diversity index of Holothurioidea at Pancur Shore is low (0.930) and the equality index classified uneven (0.447).Keywords: Holothurioidea, intertidal, diversity, evennes
Karisma Wulan Ningtyas, Zulfikar Zulfikar, Bambang Piluharto
Published: 22 November 2016
Jurnal ILMU DASAR, Volume 16; https://doi.org/10.19184/jid.v16i2.1520

Abstract:
Identification of ibuprofen, ketoprofen and diclofenac can be done by using simple method, it is called test strips. Test strip is made by immobilized specific reagents with entrapment technical on membrane matrix, which the used membrane nata de coco. Immobilization reagents with entrapment techniques aimed to trap reagent molecules in the space between the supporting material.The success of this imobilization can be seen from membran changing color after additional reagent and there is no leeching after additional sample on membrane. The used reagent for this identification is methyl red for ibuprofen and ketorpofen, copper acetate for ibuprofen, potassium iodide for ketorofen and mandelin for diclofenac. From the testing result can be seen that potassium iodide is the most specific reagent compare with the other threee other reagents. By using tes strip arranged with the strip made by this imobilization, test srtrip can be used to differentiate the tree other standard samples. Keywords: entrapment, nata de coco membrane, reagent spesific, test strip.
Fatimah A. Noor, Masturi Masturi, Mikrajuddin Abdullah, Khairurrijal Khairurrijal
Published: 7 August 2014
Jurnal ILMU DASAR, Volume 15; https://doi.org/10.19184/jid.v15i1.642

Abstract:
Modeling of the leakage current in a field-effect transistor metal-oxide-semiconductor (MOSFET) with high dielectric material has been developed by taking into account the effect of charge traps formed at the interface of high-k material/SiO2. Transmittance calculated using Airy wave function approach and involving the anisotropic electron mass and the effect of coupling between transverse and longitudinal energy represented by the speed of the electrons in the metal gate. Transmittance obtained is then used to calculate the leakage current in the structure of n+Poly-Si/HfSiOxN/trap/SiO2/p-Si for oxide voltage variations, temperature, and thickness of the SiO2. From the calculation that the leakage current decreases with decreasing of oxide voltage and increasing of the thickness of the oxide layer of SiO2. Also obtained that the temperature of the device does not give a great influence on the change of leakage current. Keywords: Leakage current, electron speed, charge traps
Pining Suwardining Tyas, Dwi Setyati, Umiyah Umiyah
Published: 16 July 2014
Jurnal ILMU DASAR, Volume 14; https://doi.org/10.19184/jid.v14i2.635

Abstract:
‘Diamond river’ is introduction plant that cultivated in Indonesian. Development of longan flower divided into eight stadium during 28 days. First and second stadium is the induction phase that lasts for 8 days, this phase is characterized by a change in color of the leaves become older by using the Munsell color charts for plant tissues indicate the scale of 7.5 GY (4/4) to GY 7.5 scale (3\2). Third stadium is the phase of flower initiation occurred by day eigth. Initiation stage appearance were showed by merristem axilar, which will form part of primordial flower. Fourth to seventh stadium are phase that a differentiation occurred on day 12 to day 24. Differentiation phase showed the development in suitable with the typical angiosperms are sepals, stamens, petals and pistils. Eighth stadium is the phase of anthesis occurred on day 28. In the phase of anthesis, flowers have undergone a process of pollination and fertilization. Keywords: Development, Diamond river, Flowering, stadium
Nur Inna Alfianinda, Misto Misto, Artoto Arkundato
Published: 7 August 2014
Jurnal ILMU DASAR, Volume 15; https://doi.org/10.19184/jid.v15i1.834

Abstract:
Telah dirancang alat uji kemurnian bahan yang bekerja berdasarkan metode difraksi Fraunhofer celah ganda. Metode ini mempunyai akurasi yang baik, tidak memerlukan bahan uji dalam jumlah banyak serta tidak merusak kemurnian bahan uji itu sendiri (non destructive testing/non contactive testing). Pengujian dilakukan dengan menentukan persamaan indeks bias sebagai fungsi suhu bahan uji, yang diperoleh berdasarkan perubahan pola frinji gelap terang difraksi cahaya yang melewati bahan uji untuk variasi suhu yang diberikan (26 °C hingga 90 °C). Dari persamaan indeks bias yang diperoleh kemudian dapat dihitung indeks bias pada suhu sembarang. Uji kemurnian dilakukang dengan membandingkan nilai indeks bias terukur dengan nilai indeks bias referensi pada suhu tertentu. Uji statistik t-test digunakan untuk melihat tingkat akurasi alat. Pada penelitian ini digunakan tiga buah merk minyak wijen yang ada di pasaran. Dari hasil pengukuran dan perhitungan menggunakan minyak wijen tiga macam (A,B dan C) dapat diketahui bahwa dari ketiga bahan uji yang dipilih maka minyak wijen label B memiliki nilai t hitung yang paling kecil dibandingkan minyak wijen label A dan C, sehingga minyak wijen label B dianggap memiliki kualitas yang paling baik dia antara ketiga minyak wijen yang telah di uji. Keywords: Difraksi Fraunhofer, minyak wijen, indeks bias bahan, uji-t
Misto Misto, Tri Mulyono, Alex Alex
Published: 24 January 2017
Jurnal ILMU DASAR, Volume 17; https://doi.org/10.19184/jid.v17i1.2664

Abstract:
It has been made an electronic system for measurement of sugar cane in solution media. This system uses a pin photodiode as a sensor, laser source, optical fiber, an operational amplifier (Op-Amp), analog to digital converter (ADC) of the Arduino, and computers. The main operation of the measurement system is done by the sensor and controlled by computer. The the photodiode sensor sends a signal to a signal processing unit (op-amp) and converted to a digital signal by the ADC. The digital signal is then forwarded for processing and display (computer). We Concluded that the system working well because of the sugar content information can be simultaneously displayed on the monitor .Keywords: sugar content, pin photodiode, computer
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