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Soefjan Tsauri
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology

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ENERGY AS A DEVELOPMENT PREREQUISITE FOR ECONOMIC AND SOCIETY Soefjan Tsauri
Jurnal Kimia Terapan Indonesia Vol 10, No 1-2 (2000)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4848.405 KB) | DOI: 10.14203/jkti.v10i1-2.186

Abstract

The concept of energy as a development prerequisite is discussedin view of its role in Indonesia; a large country endowed with richnatural energy resources, with a dominant rural population.Renewable energy resources and their utilization is reviewed.Lessons can be obtained from typical income-generating energyprojects which is relevance for the small and medium scaleenterprises. A study or model of ellergy use in Indonesia using amarket allocation approach is noted, in which its relationship withair pollution issues are analyzed. The allocation of energyresources in Indonesia has the characteristics of a multidimensionalproblem. This is difficult to be resolved satisfactorily, as we knowth at thcis is part of a wider picture of the national development.The strategy includes people-centered initiatives, in anticipationof the open, competitive market in this globalized era. This paperdiscusses also the implication of energy technology developmentto the Indonesian energy economics. Basic issues related to theresearch capability, the priorities, and the allocation of resources(or research and development in Indonesia are also reviewed.Keywords: Indonesia; renewable energy resources; incomegeneratingenergy projects; model of energy use; air pollution;energy technology development.
CYTOTOXIC ISOFLAVONOIDS OF PACHYRRHiUS EROSUS SEEDS Leonardus B.S. Kardono; Soefjan Tsauri; John M. Pezzuto; A. Douglas Kinghorn; Kosasih Padmawinata
Jurnal Kimia Terapan Indonesia Vol 4, No 2 (1994)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3038.221 KB) | DOI: 10.14203/jkti.v4i2.248

Abstract

By bioactivity-directed fractionation, phytochemical and cytotoxic studies of the seeds of Pachyrrhizus erosus L. resulted in the isolation of isoflavonoid-based compounds, one novel compound and eight known compounds, comprising the novel coumaronochromene, pachyrrhisomene {1}, the known pterocarpan, neodulin {2}, the known 3-arylcoumarin, pachyrrhizin {3}, the known isoflavonoid, dehydroneotenone {4}, five known rotenoids, rotenone {5}, l2a-hydroxyrotenone {6}, 12a-hydroxypachyrrhizone {7}, 12a-hydroxyerosone {8}, and 12a-hydroxymunduserone {9}. The identities of these compounds were elucidated or confirmed using combination of modern one- and two- dimensional NMR techniques, such as 1H-1H COSY, CSCMID, 1H-1H NOESY, and selective INEPT, as well as by comparison with published spectroscopic data. It is likely that the novel compound, pachyrrhisomene {1} is derived from the same biosynthetic intermediate as the pterocarpan, neodulin {2}. All of these compounds were evaluated for their anticancer potential in a battery of tumour cell lines, comprishing P-388 lymphocytic leukemia, KB-carcinoma of the nasopharynx, a multi-drug resistant variant of KB, KB-VI, and a number of human cancer cell lines derived from a variety of tumour types, namely fibrosarcoma, lung, colon, melanoma, and breast. Two compounds, rotenone {5} and 12a-hydroxyrotenone {6} were observed to exhibit potent but nonspecific activity.
STUDI PEMISAHAN Co(II), Cu(II), Fe(III) DAN Ni(II) SECARA EKSTRAKSI PELARUT DENGAN ZAT PENGKOMPLEKS NATRIUM DIETILDITIOKARBAMAT Soefjan Tsauri; K. Anom W; Buchari Buchari
Jurnal Kimia Terapan Indonesia Vol 3, No 1 (1993)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jkti.v3i1.278

Abstract

Sodium diethyldithiocarbamate (NaDDC) as a chelating agent reacts unselectively with cobalt(II), copper(II), iron(III) and nickel(II). Their maximum wavelengths are very similar in carbon tetrachloride solution and hence these complexes could not be determined by UV/VIS spectrophotometer without prior separation. A scheme of separation has been found for qualitative analysis of cobalt(II), copper(II), iron(III) and nickel(II) at a certain pH using a specific masking agent. It was found that pH 9 turned out to be the best condition for iron(III) masking but neither for cobalt(II), nor for copperill] and nickel(II). The addition of 10 mL HCI 12 N to the complex solutions of Co(II), Cu(II) and Ni(II) would remove Cu(II) and Ni(II) complexes from CC14 to water phase whereas Co(II) complex was still in the CCl4 phase. Cu(II) and Ni(II) ions in the water phase were then treated with 10 mL Titriplex 8,66 x 10-5 mole at pH 9 in which Ni(II) was masked but not Cu(II).
MENUJU LABORATORIUM ANALISIS LlNGKUNGAN TERPADU DAN TANTANGAN MASA DEPAN Soefjan Tsauri; Soemanto Imamkhasani
Jurnal Kimia Terapan Indonesia Vol 10, No 1-2 (2000)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jkti.v10i1-2.185

Abstract

An idea on an integrated environmental analytical laboratoryand its challenges for the future were discussed. A generalanalytical laboratory equipped with conventional and instrumentalmethods could be improved to environmental laboratory byaddition of sampler eguipment. These include water sampler, impinger for sampling of ambient air, stack gas sampler andleaching test (TCLP) , all of these have been made locally andtherefore easily purchased with low price. Laboratory accreditationwas also discussed for improving the quality of laboratory as areliable environmental data generator. Accreditation requirementssuch as registration, methods of analysis, quality control, physicalcondition of lab oratory, equipment and instrument were explained.In addition, other challenges in research were pointed out on thearea of semi-micro techniques, sensor, micro-instruments,automation and telemetric system. Experiences showed thatenvironmental analytical laboratory had good challenges forbusiness. Analytical services, development of monitoring systemand training were identified as prospective business in Indonesiaparticularly in East of Java.
Co-Authors A. Douglas Kinghorn Buchari Buchari John M. Pezzuto K. Anom W Kosasih Padmawinata Leonardus B.S. Kardono Soemanto Imamkhasani