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INDONESIA
Jurnal ILMU DASAR
Published by Universitas Jember
ISSN : 14115735     EISSN : 24425613     DOI : -
Core Subject : Science, Education,
Jurnal ILMU DASAR (JID) adalah jurnal ilmiah yang melingkupi bidang matematika, fisika, kimia dan biologi. Naskah yang diusulkan untuk diterbitkan Jurnal Ilmu Dasar adalah naskah yang belum pernah diterbitkan dan atau tidak sedang dipertimbangkan penerbitannya di majalah lain. Jurnal Ilmu Dasar menerima tulisan hasil penelitian dasar (bukan aplikasi) untuk bidang matematika, kimia, fisika, dan biologi. Naskah ilmiah ditulis dalam bahasa Indonesia atau dalam bahasa Inggris yang baik. Secara lebih detail dapat dilihat dari pedoman penulisan.
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Articles 16 Documents
Search results for , issue "Vol 10 No 1 (2009)" : 16 Documents clear
Phenolic Compounds Isolated from The Fern Chingia sakayensis (Zeiller) Holtt Suyatno, Suyatno; Syarief, Sri Hidayati; Hidajati, Nurul; Rinaningsih, Rinaningsih; tori, Motoo; Shimizu, Kuniyoshi Shimizu
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Four known phenolic compounds namely kaemferol, matteucinol, farrerol, and matteucinol-7-O-β-D-glucoside were isolated for the first time from the fern Chingia sakayensis (Zeiller) Holtt’s. All substances were separated by chromatographic techniques, purified by recrystalization, elucidated on the basis of spectroscopic evidence and by comparation with those reported data in literature. These results were very important to study the phytochemicals of the other fern in Chingia genus based on the chemotaxonomic approach.
Combinatorial Technology as a New Method for Chemical Processes Widi, Restu Kartiko; Hamid, Sharifah bee Abdul; Hong, Looi Mei
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

The ultimate goal approach to combinatorial catalysis taken in this research is from an academic perspective where the main objective is to accelerate the discovery of catalytic phenomena, i.e. new catalytic materials and catalytic processes, constrained by limited equipment and human resources. A commercially synthesis robotic workstation is used for automated parallel preparation of catalyst libraries, which is able to reproduce a conventional catalyst preparation method used routinely in laboratory, thereby increasing significantly the number of catalysts that can be prepared at once. The aim of this work is to produce libraries of catalysts based on this type of system to be tested and optimized by using the high throughput screening reactors and the selected catalysts are characterized to understand the structural properties. The 12 parallel reactors allows a proper catalyst testing, under more realistic conditions than in conventional combinatorial techniques, especially when the catalyst stage is advanced and quantitative data is required.
Characterization of Crude Protease Bacillus sp 31 Utarti, Esti; Nurita, Lina; Arimurti, Sattya
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Bacillus sp 31 was bacteria which produce protease. Characterization of protease from Bacillus sp 31 i.e. pH, temperature, influence of metal ion, enzyme kinetic and enzyme termostability is important to get optimal enzyme activity. Protease activity showed values 146.40 U/ml on pH 9 and optimal temperature 60°C by value. Protease activity increased by addition of 159.50 U/ml Fe2+, but its activity decreased by addition of Mg2+, Cu2+, Ca2+, Al2+, Zn2+ dan Mn2+. Maximal velocity (Vmax) of enzyme-catalysed reactions was 21.32 U/ml with Km 1.5x10-3 mg/ml (Michaels-Menten Kinetic). Protease was very stable at 60°C for 4 hours of incubation and 7 hours of half-time.
Interval Estimation for Quantile on Two Parameters Exponential Distribution Under Multiple Type-II Censoring on Complex Case with Bootstrap Percentile Fauzy, Akhmad
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

In this article, two methods are proposed to give the interval estimation for quantile on two parameters exponential distribution under multiply type II censoring. The interval estimation for quantile can be constructed the estimated parameters. Those researchers have use approximate maximum likelihood estimator to construct interval estimation for two parameters exponential distribution under multiply type II censoring. All of these method need an assumption that sample is exponentially distributed. We will use another method, known as the bootstrap percentile. This method gives shorter interval than the traditional method and this method does not need an assumption that the sample is distributed exponentially.
Characterization of Edamame Indigenous Rhizobia as a Candidate of Biofertilizer Arimurti, Sattya
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Five isolates, named R1, R3, R4, R6 and R7, were successfully isolated from leguminous edamame nodules, and characterized as indigenous rhizobia bacteria. All isolates were grown in a YEMA medium containing antibiotics ampicillin, streptomycin, rifampicin, tetracycline, chloramphenicol or penicillin. Cultivation revealed that R3 can grow in a medium containing all antibiotics, but not for R1 when they grow in a medium containing rifampicin. R7 could not grow when the medium contain streptomycin and rifampicin. Furthermore, R4 and R6 only grow at medium containing tetracycline. it seemed that R1 and R3 are more resistant against some antibiotics comparing with others. When YEMA containing bromthymol blue 1% medium was used, R1 produced the yellowish acid and R3 produced blue alkali. R1 also utilized dulcitol and Lhistidin as carbon and nitrogen source. R3 utilize the carbon source from dulcitol but cannot utilize the nitrogen source from L-histidin. Base on these results above, it can be suggested that R1 and R3 identified as Rhizobium leguminosarum and Bradyrhizobium japonicum.
Testing Normality and Bandwith Estimation Using Kernel Method For Small Sample Size Herawati, Netti; Nisa, Khoirin
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

This article aimed to study kernel method for testing normality and to determine the density function based on curve fitting technique (density plot) for small sample sizes. To obtain optimal bandwith we used Kullback-Leibler cross validation method. We compared the result using goodness of fit test by Kolmogorof Smirnov test statistics. The result showed that kernel method gave the same performance as Kolmogorof Smirnov for testing normality but easier and more convinient than Kolmogorof Smirnov does.
The Determination of Bedrock Depth Using Seismic Refraction Method in Kemuning Lor Village, Sub District of Arjasa, Jember Priyantari, Nurul; Supriyanto, Agus
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

A research has been done using seismic refraction method to determine the depth of bedrock in the Village of Kemuning Lor, sub district of Arjasa, Jember. The Data acquisition was done by using 12 geophones and using weight drop vibrations sources. The distance between the vibration source and the first geophone is 10 meters away, while the distance among geophones is 2 meter away each. This Data acquisitions used two tracks (the first track was about 90 meters and the second track was about 40 meters). The first and second track were crossing each other, the first track lied from the main road to crevasse, while the second track lied in line with the crevasse. The result was that we were able to obtain three layers having the depth of 3,03-6,76 m; 4,37-9,93 m and 10,68-13,32 m, and having spreading speed 168,9-198,8 m; 425,1-511,7 m and 909,1-972,2 m. The obtained bedrock profile had declivity toward the crevasse and is assumed to have the potential of soil movement.
Cross-linked Chitosan Synthesis Using Glutaraldehyde and Functional Group Identification as well as Its Deacetylation Degree Basuki, Bagus Rahmat; Sanjaya, I Gusti Made
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Cross-linked chitosan with 78,12% deacetylation degree, synthesed from chitosan bead with 135,982% swelling degree were conducted. Chitosan bead has prepared from chitosan that was dissolved with watery acetic acid and coagulated with sodium hydroxide. Chitosan with 79,6% deacetylation degree was prepared from chitin that was submitted to a deacetylation reaction. Chitin were applied, isolated from giant tiger shrimp that was submitted to a demineral and deproteination reaction. Functional group of the cross-linked chitosan with glutaraldehyde were investigated by the Infra Red spectroscopy and deacetylation degree were investigated by the base line methods. Chitin, chitosan and chitosan bead have the same structure. The difference between chitin and chitosan was the deacetylation degree and chitosan bead in the physical shape. The deacetylation degree and swelling degree of chitosan bead was decreased by cross-linking process.
Analysis of Sacharide Monomer and Functional Groups of Fe- Dietary Fiber Complex at Acid Condition Boiling Yuanita, Leny
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

The aim of the study was to describe the changes of sacharide monomer and functional groups of Fe-dietary fiber complex at boiling with acidic medium. The research was designed as the Pre test-Post test Control Group, the treatment of variation pH (pH 3 and 7) and boiling time (raw and 35 minutes). The dependent variables were sacharide monomer of dietary fiber and functional groups of Fe-dietary fiber complex. FeSO4. 7 H2O was added as source of mineral Fe. The results of the study showed: 1) At pH 3-boiling time 35’ treatment, no changes to kinds of dietary fiber sacharide monomer, however changes of monomer content. 2) At pH 3-35’ treatment, the Fe binding both to lignin and cellulose at –OH groups, but it was not able to bind hemicellulose. At raw-pH 7, the Fe binding to lignin at –OH, -COOH groups; to cellulose at –OH, -CH2-O-CH2-, -COO groups; while to hemicellulose at –OH groups.
Resistance against Bacillus thuringiensis endotoxins in a laboratory population of Helicoverpa armigera is based on an elevated immune status Sarjan, Muhammad; Rahman, Mahbub M; Ma, Gang; Schmit, Otto
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Recent   observations   suggest   that   lectin-like   toxins,   such   as   endotoxins   from  Bacillus   thuringiensis  are sequestered inside the gut of immune-induced insects providing tolerance to Bt-formulations. To investigate the induction   and   sequestration   process,   we   used   toxin   and   lectins   that   bind   to   galactosamine   (Gal)   and   N-acetylagalactosamine (GalNAc) to identify binding sites in the midgut of induced and non-induced insects using confocal   microscopy.   Our   observations   suggest   that   immune   and   metabolic   hemolymph   components   are transported across the gut epithelium and accumulate inside the gut lumen in Bt-tolerant insects. Co-location of immune components and toxin indicates that some of the toxin is inactivated by coagulation reactions inside the gut lumen before it can reach the brush border membrane

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