Vol. 7 No. 1 (1973)

Ringkasan. Pembusukan pada udang adalah suatu akibat kerdja enzima2 hidrolitik berasal dari udang sendiri dan djuga dari bakter2 jang ada pada udang. Hasil penelitian menjatakan bahwa aktivitas spesifik SH-protease udang ber-angsur2 menurun selama proses pembusukan, sehingga sifat ini baik untuk dipakai sebagai kriteria pembusukan udang. Aktivitas enzima ditentukan pada 37oC selama 20 menit dengan 1% kasein dalam 0,1 M buffer fostat pH 8 sebagai substrat dan siteina (0,02 M) sebagai activator. Sebagai larutan enzima dipakai homogenat udang dalam 0,1 M buffer fosfat pH 8. Berdasarkan atas…

Ringkasan. Penelitian terhadap ada tidaknya efek stimulatif dari bakteria tertentu terhadap pembentukan tubuh-buah djamur padi (Volvariella volvacea (Fr.) Sing.) telah dilakukan dalam kondisi semi steril. Ternjata bahwa adanja bakteria tertentu merangsang pembentukan tubuh-buah djamur padi. Abstract. A study has been made on the stimulative effect of certain specific bacteria upon fruit body formation of rice straw mushroom (Volvariella volvacea (Fr.) Sing.) under semi-sterile condition. It was shown that the presence of specific bacteria stimulated fruit body formation of rice straw mushroom.

. A comparative study on the reactive capacity of the presumptive ecto-neuroderm on mesoderm formation with increase of age has been done in Xenopus Laevis. It was proved that before gastrulation, mesoderm induction mainly produces dorsal mesodermal structures. During the gastrulation process the product of differentiation tends to shift from dorsaL to ventral mesodermal structures. The presumptive ecto-neuroderm has has already a competence for mesoderm formation at the early blastula stage and this competence starts to fade out at the horse-shoe-shaped blastopore stage. Ringkasan. Suatu…

. The basic concept of a commercial steamfield is discussed and defined in this paper. Based on this discussion potential areas are indicated in a map. It is found that not less 24 geotherrnal areas are prospectable. However, it is found that very little is known about the exact potential of Indonesia in the field of geothermy. Anticipating the rising demand in electricity within the context of the broader industrialisation program of Indonesia and the limitation of its fossil fuel reserve, it is suggested that all possibilities for utilising different kinds of energy, including geothermy…