Vol. 4 No. 1 (1967)

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…

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.

. 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…