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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 3 Documents
 1 
Search results for , issue "Vol. 4 No. 1 (1967)" : 3 Documents clear
Industrial Possibilities of Idjen Crater Lake Water Tjiook Tiauw Kien
Journal of Mathematical and Fundamental Sciences Vol. 4 No. 1 (1967)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Abstract. Idjen Crater Lake Water containing 600.000 tons of sulfur 1) 4) (compare total Indonesian sulfur reserves of 1 million tons 2) has been investigated as to the possibility of its use as an industrial raw material. Although sulfate can most conveniently be recovered from the dilute acid solution as gypsum, it is advantageously suggested to convert the latter into ammonium sulfate, thus potentially increasing the possibility of fertilizer production in Indonesia. A flowsheet has been proposed. Although processing the Lake Water seems to be feasible front a technological point of view, a possible danger of Idjen Volcano eruption, however small, should not be overlooked.  Ichtisar. Air Kawah Idjen jang mengandung 600.000 ton belerang (bandingkan dengan tjadangan Indonesia sebanjak sedjuta ton) telah diselidiki mengenai kemungkinan untuk dipakainja sebagai bahan mentah industri. Meskipun sulfatnja dengan mudah dapat diperoleh dari larutan asam jang entjer itu sebagai gips, telah diusulkan untuk mengolah terus zat achir ini mendjadi ammoniumsulfat (Z.A.), jang merupakan bahan pupuk jang berharga. Walaupun pengolahan Air Kawah Idjen ternjata mungkin sekali dari sudut teknologi, perlu diselidiki pula kemungkinan meletusnja gunung api tsb., meskipun hal itu telah lama tidak terdjadi.
Spacing of Beach Cusps Near Pandjang Harbour, Lampung H.D. Tjia
Journal of Mathematical and Fundamental Sciences Vol. 4 No. 1 (1967)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Tepilaut disebelah timur pelabuhan Pandjang, Lampung, Sumatera terdiri dari pasir sepandjang 100 meter dan jang miring lemah kearah laut. Disana terdapat sedjumlah "beach cusps" dengan apex jang berukuran 1,5 m serta jang masing-masing terletak pada djarak 2,5 m. "Beach cusps" tersebut terdapat dimuka pohon-pohon njiur, sehingga penulis mendapat kesan bahwa disana "beach cusps" terutama terbentuk sebagi bajangan kerikil atau "pebble-shadows" dimuka pohon-pohon akibat arus jang kembali kelaut; mungkin terpengaruh pula oleh kekuatan ombak dan kemiringan lereng tepilaut.
Synthetic Medium for Growing Single Cells of Tobacco E. Noerhadi
Journal of Mathematical and Fundamental Sciences Vol. 4 No. 1 (1967)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

1. Studies were done to find out a synthetic defined medium for growing single cells of tobacco. Two kinds of media were tried for these purposes. With several changes in components, the revised medium of LINSMAIER & SKOOG (6) seemed to be good lot suspension and plating cultures of tobacco cells. The medium used by ERARLE & TORREY (3) for cells of Convolvulus also gave the desired results (table 1, plate 3).2. Growth of both callus and single cell cultures occurred on comparable kinetin concentrations.3. These studies (about the relationship between IAA and kinetin) gave no evidence of differentiation of the cell colonies within seven weeks after transferring the cells into the medium (plate 5). 

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