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Makara Journal of Science
Published by Universitas Indonesia
ISSN : 23391995     EISSN : 23560851     DOI : https://doi.org/10.7454/mss
Core Subject :
Makara Journal of Science publishes original research or theoretical papers, notes, and minireviews on new knowledge and research or research applications on current issues in basic sciences, namely: Material Sciences (including: physics, biology, and chemistry); Biochemistry, Genetics, and Molecular Biology (including: microbiology, physiology, ecology, taxonomy and evolution); and Biotechnology.
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Articles 6 Documents
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Search results for , issue "Vol. 20, No. 2" : 6 Documents clear
Genetic Diversity of Japonica Rice (Oryza sativa L.) Based on Markers Corresponding to Starch Synthesizing Genes Lestari, Puji; Reflinur,
Makara Journal of Science Vol. 20, No. 2
Publisher : UI Scholars Hub

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Abstract

Genes related to starch synthesis and the metabolism contribute to a variety of physicochemical properties that determine the eating/cooking qualities of rice. Our previous study suggested that a set of molecular markers was able to estimate the eating quality of japonica rice. The present study reports the genetic diversity of 22 japonica rice varieties based on markers corresponding to starch synthesizing genes. The mean of the polymorphic information content (PIC: 0.135) value and the diversity index (0.171) indicated a low genetic diversity in these varieties. The phylogenetic tree clearly demonstrated three main clusters: 1) cluster I contained seven varieties with similar physicochemical properties; 2) cluster II only showed a Japanese variety, Koshihikari, and 3) cluster III included the most Korean varieties (14 varieties). This phylogenetic analysis did not completely represent the physicochemical properties differentiation of the japonica varieties, although it did reveal an initial clue to the close relationship between Korean rice and the Japanese and Chinese varieties. Notably, these markers were also able to identify a premium japonica rice. The molecular markers and information concerning the genetic relationship would be useful in improving the japonica rice along with its starch quality of in breeding program.
Reproductive Characteristics of Female Egg-carrying Buntingi, Xenopoecilus oophorus, an Endemic Fish to Lake Poso in Central Sulawesi Gundo, Meria Tirsa; Rahardjo, Muhammad Fadjar; Batu, Djamar Tumpal Frederik Lumban; Hadie, Wartono
Makara Journal of Science Vol. 20, No. 2
Publisher : UI Scholars Hub

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Abstract

Reproduction characteristic of female egg-carrying buntingi, Xenopoecilus oophorus had been studied. This research was conducted at Lake Poso, Central Sulawesi, Indonesia. Specimens were collected monthly from August 2012 to July 2013 at four sampling stations around the lake. Macroscopic observations of ovarian maturity level and gonadosomatic index revealed a long reproductive period during the rainy season, with four spawning peaks in November, January, February and April. The highest total fecundity was 135 oocytes, and the highest batch fecundity was 36 oocytes. Analysis of the oocyte diameter frequency distribution showed X. oophorus is a multiple spawner. Batch fecundity was correlated (r = 0.78) with body weight.
Photoproduction of π0-Mesons from the Nucleon and Deuteron Darwish, Eed Mohamed; Hemmdan, Amel; El-Shamy, Nesreen T.
Makara Journal of Science Vol. 20, No. 2
Publisher : UI Scholars Hub

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Abstract

The photoproduction of π0-mesons from the nucleon and deuteron has been studied for incidents of photon energies up to 1.5 GeV. By using the MAID-2007 model for the process on the nucleon, we predict results for the unpolarized and helicity-dependent total cross sections of the semi-exclusive reaction γd→π0X (X=np+d) with the inclusion of rescattering effects. We find that rescattering effects yield a substantially large contribution. The extracted results are compared with the available experimental data and a satisfactory agreement is obtained. In addition, the contribution of γd→π0X (X=np+d) to the finite GDH integral has been evaluated by explicit integration up to 1.5 GeV and a total value of 256.96 µb has been obtained. Convergence of the GDH integral has been reached.
The Trophic Status of the Lubuk Lampam Floodplain in South Sumatera, Indonesia Jubaedah, Dade; Kamal, Mohammad Mukhlis; Muchsin, Ismudi; Hariyadi, Sigid
Makara Journal of Science Vol. 20, No. 2
Publisher : UI Scholars Hub

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Abstract

The Lubuk Lampam floodplain’s ecosystem is naturally affected by the fluctuation of the water surface. This ecosystem also receives anthropogenic substances such as nutrients and other chemicals, especially from the oil palm plantation and its industrial processing activities. The main objective of this research was to determine the trophic status of the floodplain using the trophic level index (TLI) and Carlson’s trophic state index (TSI). The water quality and the fish samples were collected and analyzed from 7 stations representing various types of floodplain habitat. The results showed that the trophic status of Lubuk Lampam was hypereutrophic (very nutrient-rich). This was also supported by the high increase of the body weight (“b” value more than 3) and the high gonadosomatic index (GSI) of the studied fishes, i.e. Osteochilus vittatus 2.53-6.81% (male) and 3.00-15.86% (female); Helostoma temminckii 0.28-3.33% (male) and 1.30-10.43% (female); and Channa striata 0.33-0.59% (male) and 0.21-2.73% (female).
Synchrotron Infrared Spectroscopy of Microporous Materials Howe, Russell F.
Makara Journal of Science Vol. 20, No. 2
Publisher : UI Scholars Hub

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Abstract

This review describes the ways in which synchrotron infrared radiation can be used to perform infrared spectroscopy on catalyst materials. The enhanced brightness of the synchrotron source over a conventional laboratory source allows for microspectroscopy to be performed on single crystals of microporous materials down to 10 microns in size. A second application was performed in the far-infrared region, which is generally difficult using laboratory instruments. The review presents typical results from both areas and discusses future prospects.
The Explosive Sensitivity on the Complex Formation of 3-Nitro-1,2,4-Triazol-5-One and Metal Ions Based on Density Functional Study Hadisaputra, Saprizal; Prasetyo, Niko
Makara Journal of Science Vol. 20, No. 2
Publisher : UI Scholars Hub

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Abstract

The explosive sensitivity upon the formation of supramolecular interaction between the nitro group of 3-nitro-1,2,4-triazol-5-one (NTO) and metal ions (Mn+ = Li+, Na+, Be2+ and Mg2+) has been investigated using Density Functional Theory at B3LYP/6-311++G** level of theory. The bond dissociation energy (BDE) of the C1–N6 trigger bond has also been discussed for the NTO monomer and the corresponding complexes. The interaction and bond dissociation energy of the C6–N7 trigger bond follow the order of NTO-Be2+ > NTO-Mg2+ > NTO-Li+ > NTO-Na+ > NTO monomer. The enhancement of the trigger bond dissociation energy in comparison with the NTO monomer correlates well with the complex interaction energies, trigger bond length, and charge transfer. The analyses of electron density shifts have shown that the electron density of the nitro group shifts toward the C1–N6 trigger bond upon the formation of the supramolecular interaction. As result, the trigger bond is strengthened and the sensitivity of NTO is reduced. Some of the calculated results agree with the experimental values.

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