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Journal of Mathematical and Fundamental Sciences
Published by Institut Teknologi Bandung
ISSN : 23375760     EISSN : 23385510     DOI : https://doi.org/10.5614/j.math.fund.sci.
Core Subject : Science, Education,
Astronomy Chemistry Earth & Planetary Sciences Mathematics Physics
Journal of Mathematical and Fundamental Sciences welcomes full research articles in the area of Mathematics and Natural Sciences from the following subject areas: Astronomy, Chemistry, Earth Sciences (Geodesy, Geology, Geophysics, Oceanography, Meteorology), Life Sciences (Agriculture, Biochemistry, Biology, Health, Medical, Pharmacy), Mathematics, Physics, and Statistics.
Arjuna Subject : Matematika - Matematika (Lain-Lain)
Articles 2 Documents
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Search results for , issue "Vol. 17 No. 1 (1984)" : 2 Documents clear
Transparansi Angkasa Sebelum dan Sesudah Letusan Gunung Api : Kasus Angkasa Lembang Th. 1982 Hakim Luthfi; Cecep Nurwendaya; Bambang Hidayat
Journal of Mathematical and Fundamental Sciences Vol. 17 No. 1 (1984)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Sari. Hasil pengamatan fotoelektrik bintang standar dengan refraktor Bamberg, di Obseryatorium Boscha, Lembang, pada periode Juli 1982, memperlihatkan koefisien ekstingsi angkasa lebih tinggi dibandingkan dengan koefisien ekstingsi yang diperoleh pada bulan Juni Juli 1983. Koefisien ekstingsi adalah ukuran transparansi angkasa. Makin besar koefisien absorpsi makin rendah transparansi. Berkurangnya transparansi di tahun 1982 diduga karena penambahan partikel stratosfer, yang berasal dari sisa letusan Galunggung. Abstract. Observations of photoelectric standard stars with the Bamberg refractor of the Bosscha Observatory, in July 1982 revealed abnormally high atmospheric extinction coefficients, as compared to that obtained in July 1983. It is thought that the increase of extinction in July 1982, was caused by the increase in number of small particles in the stratrosphere, The particles were remnants from the eruption of Mount Galunggung (ca. 90 km south east of the Observatory) which erupted weeks earlier.
The Effect of Water Temperature on the Respiration Rate of Cyprinus carpio L. Darmadi Goenarso
Journal of Mathematical and Fundamental Sciences Vol. 17 No. 1 (1984)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Abstract. A study on the influence of alteration of water temperature on the respiration of a carp, Cyprinus carpio L. was performed. Oxygen consumption was measured by the continuous-flow technique. All fishes used in this experiment were acclimatized to 200C. It revealed that increasement of water temperature to 300C would caused the oxygen consumption of a fish to increase. Sari. Telah dilakukan penelitian pengaruh perubahan suhu air terhadap pernapasan ikan mas, Cyprinus carpio L. Pengukuran penggunaan oksigen dilakukan dengan teknik air mengalir. Ikan yang dipakai dalam percobaan ini diaklimatisasikan pada suhu 20'C. Hasil percobaan menunjukkan bahwa kenaikan suhu air hingga 30'C menyebabkan pertambahan penggunaan oksigen pada ikan.

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