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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 13 Documents
Search results for , issue "Vol 12 No 2 (2011)" : 13 Documents clear
Application of Ionic Liquids ss Reaction Media for The Xylanase Reaction Oktavianawati, Ika
Jurnal ILMU DASAR Vol 12 No 2 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

The potential for performing Thermomyces lanuginosus xylanase-catalyzed reactions on birchwood xylan dissolved in a range of ionic liquids has been investigated. As apparent from the results, some of the selected hydrophobic ionic liquids performed as better facilitators of the hydrolysis reactions than the hydrophilic ones. Thus, the xylanase reaction profiles in these hydrophobic ionic liquids, including [Py1,4]tfsa, [C4MIm]PF6, [P6,6,6,14]BF4, [P6,6,6,14]dca, [P6,6,6,14]bisphosphinate, and [C1MIm]MeSO4, were investigated in greater detail and the conditions for optimum temperature, optimum pH, and kinetic parameters documented. [P6,6,6,14]bisphosphinate was found to be the best ionic liquid producing the highest xylanase activity (84.98 unit/mg protein) at high temperature and pH, namely at 85°C and pH 9.0, respectively, among all of the ionic liquids tested. In addition, this ionic liquid increases the specificity of the xylanase toward xylan, indicated by lower KM (6.42 mg/mL), though it does not observed well on its enzyme’s enhancement rate. Therefore, this study indicates that the application of this ionic liquid for the hydrolysis of real lignocellulosic samples, such as wood pulp, is warranted. Further investigations, outside the scope of this research will be required to validate these observations.
Regeneration of Cocoa Zygotic Embryo Using Kinetin in B5 Media Avivi, Sholeh
Jurnal ILMU DASAR Vol 12 No 2 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

The objective of this research was intended to identify the influence of kinetin application on zygotic embryo regeneration of several cocoa plants and examine the most appropriate kinetin concentration for regeneration of several cocoa clones. This research was conducted at Laboratory of Plant Tissue Culture, Agronomy Department, Faculty of Agriculture,Jember University. The research was designed by Completely Randomized Factorial Design within four replications. The first factor was 4 cocoa clones which consisted of DR 1, DR 2, ICS13 and ICS60.The second factor was 5 methods of zygotic embryo regeneration. Result showed that the best response of cocoa clone to kinetin concentration of all examined parameters was shown by DR 1 clone. Morever, on initiation stage, the most appropriate kinetin concentration for regeneration of several cocoa clones was 2 ppm.
On Ï„ [M ]-Cohereditary Modules Suprapto, S; Wahyuni, Sri; Wijayanti, Indah Emilia; Irawati, I
Jurnal ILMU DASAR Vol 12 No 2 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Let R be a ring with unity and N a left R-module. Then N is said linearly independent to R (or N is R-linearly independent) if there exists a monomorphism φ : R(Λ) → N . We can define a generalization of linearly independency relative to an R-module M. N is called M-linearly independent if there exists a monomorphism φ:M(Λ) →N. Amodule  iscalled M-sublinearly independentif  is a factormodule of a module which is M-linearly independent. The set of M-sublinearly independent modules is denoted by τ [M ]. It is easy to see that τ [M ] is subcategory of category R-Mod. Furthermore, any submodule, factor module and external direct sum of module in τ [M ] are also in τ [M ]. A module is called τ [M ]-injective if it is P-injective, for all modules P in τ [M ]. Q is called τ [M ]-cohereditary if Q ∈τ [M ] and any factor module of Q is τ [M ]-injective. In this paper, we study the characterization of category τ [M ]-cohereditary modules. For any Q in τ [M ], Q is a τ [M ]-cohereditary if and only if every submodule of Q-projective module in τ [M ] is Q-projective. Moreover, Q is a τ [M ]-cohereditary if and only if every factor module of Q is a direct summand of module which contains this factor module. Also, we obtain some cohereditary properties of category τ [M ]. There are: for any R-modules P, Q. If Q is P-injective and every submodule of P is Q-projective, then Q is cohereditary (1); if P is Q-projective and Q is cohereditary, then every submodule of P is Q-projective (2); a direct product of modules which τ [M ]-cohereditary is τ [M ]-cohereditary (3). The cohereditary characterization and properties of category τ [M ] above is truly dual of characterization and properties of category τ [M ].
Handling Outlier in Two-Ways Table by Robust Alternating Regression of FANOVA Models: Towards Robust AMMI Models Hadi, Alfian Futuhul
Jurnal ILMU DASAR Vol 12 No 2 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

AMMI (Additive Main Effect Multiplicative Interaction) model for interactions in two-way table provide the major mean for studying stability and adaptability through genotype × environment interaction (GEI), which modeled by full interaction model. Eligibility of AMMI model depends on that assumption of normally independentdistributederrorwithaconstantvariance. Nowadays,AMMImodelshavebeendevelopedforany conditionofMETdatawhich violencethenormality,homogeneityassumpion. Wecanmentioninthisclassof modelling as M-AMMI for mixed AMMI models, G-AMMI for generalized AMMI models. The G-AMMI was handling non-normality i.e categorical response variables using an algorithm of alternating regression. While in handling the non-homogeneity in mix-models sense, one may use a model called factor analytic multiplicative. The development of AMMI models is also to handle any outlier that might be found coincides withnon-homogeneityconditionofthedata. Inthispaper,wewillpresentofhandlingoutlierinmultplicative model by robust approach of alternating regression algorithm.
Modeling Total Maintenance Cost of a Repairable System in Some Bounded Time Interval Suyono, S; Weide, J.A.M. van der
Jurnal ILMU DASAR Vol 12 No 2 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

In this paper we model the total maintenance cost of a repairable system where the inter-maintenance times are modeled as discrete-time and continuous-time renewal processes. The maintenance cost is assumed to be a function of the lifetime of the system. We derive the probability distribution, including the mean and the variance, of the total maintenance cost. The results are presented in the form of generating functions and Laplace transforms that in general have to be inverted numerically. Some examples are presented in this paper.
Effect of MgO Buffer Layer on The Quality of ZnO Films Grown on C-Sapphire by Plasma-assisted MBE Method Setiawan, Agus; Yao, Takafumi
Jurnal ILMU DASAR Vol 12 No 2 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

We have investigated the role of low temperature (LT)-MgO buffer layer on the quality of ZnO films grown on c-sapphirebyplasma-assistedmolecularbeamepitaxy(P-MBE)method. EffectofMgObufferthicknessand its annealing were evaluated. We found that surface morphology and crystalline quality of the ZnO layers were improved by controlling of the buffer layers. There is no improvement in morphology and crystalline quality of the ZnO layers if the buffer thickness is less than the critical thickness. The critical thickness is determined to be 1.5 nm. Furthermore, surface, structural, optical, and electrical qualities of the ZnO layers were improved by annealing MgO buffer at high temperature. Dislocation density of the ZnO layer was reduced from 5.3 x109 cm-2 to 1.9 x109 cm-2 by annealing the MgO buffer layer. The results indicate that we can engineer defect in highly mismatched heteroepitaxial using buffer layer.
Study of Dehydration of Ricinoleic of Castor Oil By P2O5 Sitorus, Marham; Ibrahim, Sanusi; Nurdin, Hazli; Darwin, Djaswir
Jurnal ILMU DASAR Vol 12 No 2 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

The aim of this research is to find out the best temperature, time and amount of dehydrator on dehyration of ricinoleic of castor oil by P2O5. Dehydration as means to obtain linoleic and CLA (conjugated linoleic acid) as glyseride forms. Dehydration was carried out using various temperature, time and amount of dehydrator. The reaction medium was maintained under vacuum through by silica gel to reduced water, gentle bubling with nitrogen thorough by Mg to prevent oxidation, and used Zn powder as an antipolymerization agent. Dehydration was followed by GC which the best result was caused the lowest ricinoleic and the highets linoleic and CLA. Identification was done by FTIR, UV and GC- MS and it was compared with the standard. The best dehydration was obtain for 200oC, 3% (w/w) P2O5, and 4 h with a convertion factor (yield) of 97,94%. The composition of best result was: 1.02% (9c – 12c) linoleic, 41.97% (9c/t – 12t/c) linoleic, 19.50% (9c/t-12t/c) CLA, 4.89% (9t – 12t)linoleic,19.79%(9t–11t)CLA and0.94%ricinoleic.TheratioofCLA:linoleicofdehydrated was 0.82 : 1 or 76.18 % compared to the standard CLA with the proportions of 1.45:1.
A Comparison Study for Agrobacterium-mediated transformation Method in Sugarcane (Saccharum spp L.) Sugiharto, Bambang; Safitri, Hilda
Jurnal ILMU DASAR Vol 12 No 2 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

In order to compare transient expression of gus gene driven by CaMV 35S or rice ubiquitin RUBQ2 promoter, Agrobacterium-mediated transformation was conducted using embryogenic callus and suspension cultures of sugarcane. Histochemical observation of GUS activity after co-cultivation showed that rice ubiquitin promoter produced high level of clear blue spots both in embryogenic callus and suspension cultures, while the CaMV35S promoter was not detected. Regenerated shoots from the infected materials were found higher in suspension cultures than embryogenic callus. The results showed that the rice ubiquitin promoter as well as suspension cultures are more efficient for the Agrobacterium-mediated transformation. However, PCR analysis found there was no amplification of DNA neither for CaMV35 nor rice ubiquitin in genome DNA of regenerated shoot. Lacking of integration of the DNA into the genome showed that the regenerated shoots were not truly transformants might due to the presence of somaclonal variation that was common phenomenon in the regeneration from callus. To avoid the presence of somaclonal variation the transformation was then conduced using in vitro plant without intervening callus phase. Basal segment of in vitro plants prepared from axillary buds of sugarcane were used as the explants for the transformation. The histochemical observation of GUS activity showed that almost all of the infected materials partially exhibited blue color on the basal region. Infected in vitro plants showed rapidly grow and multiplied in theselection medium. Further investigation of the transformation using in vitro plants and Agrobacterium harboring SoSUT1 DNA construct driven by rice actin promoter resulted in development of antibiotic resistant sugarcane shoots. Interestingly the PCR analysis found an insertion of the antibiotic DNA fragment into the sugarcane genome DNA. This result suggests that in vitro plant is an effective target tissue for Agrobacterium-mediated transformation in sugarcane.
Characterization of Nata De Coco-Benedict Film by Adsorption as Sensor for Glucose in Urine Sample Indarti, Dwi; Asnawati, A
Jurnal ILMU DASAR Vol 12 No 2 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Research on nata de coco utilization as a film to immobilize benedict reagent for glucose analysis has been conducted. Immobilization of benedict by nata de coco film was evaluated by using adsorption method and characterization i.e. physical characterization (morphology) and viability characterization of its sensors activity for glucose. Morphological characterization (SEM) showed that the benedict reagent has been absorbed by nata de coco film despite leaching activity of 14.7%, with optimum concentration of Benedict of 0.2682 M, 40 min dyeing time at maximum of 541 nm. Sensor characterization of cellulose nata-Benedict for glucose showed regression coefficient of 0.9895, the detection limit of 780 ppm with a sensitivity of 0.001 and adsorption reproducibility of 0.2013%. Glucose content measurement on urine sample by using Nata De Coco-Benedict based Film Nelson-Somogyi.
On Total Vertex Irregularity Strength of Cocktail Party Graph Wijaya, Kristiana; Slamin, S; Miller, Mirka
Jurnal ILMU DASAR Vol 12 No 2 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

A vertex irregular total k-labeling of a graph G is a function λ from both the vertex and the edge sets to {1,2,3,,k} such that for every pair of distinct vertices u and x, λ(u)+∑λ(uv)≠λ(x)+∑λ(xy). uv∈E xy∈E. The integer k is called the total vertex irregularity strength, denoted by tvs (G ) , is the minimum value of the largest label over all such irregular assignments. In this paper, we prove that the total vertex irregularity strength of the Cocktail Party graph H2,n ,that is tvs(H2,n )= 3 for n ≥ 3.

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