SOME ABOUT absorption experiment RADIO-PHOSPHORUS BY AND VIGNA sinensis The impact on APHIS FABAE OF LIFE Parasites IS ON THE PLANTATION

In doing this experiment percabaan-affected by our experimental BJORLING (l) is an experiment about Vida faba and Aphis fabae Scop Principally, let Vida faba absorbing solution P-32 and kept alive over Aphis plants. Experiments following this complete research BJORLING (l) above, and include some of the experiment. MOH. AMIR B. Sc.;Seksi Entomologi, Fakultas Biologi Universitas Gajah Mada Yogyakarta

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POSSIBILITY OF USE OF GAMMA SINAR to raise Silk NATURAL PRODUCTION

The influence sinar-sinar the mengionisasi especially against bahan-bahan biologik in the ability to conduct genetic mutation, already since two years on uhan known (1, 2). To memfaatkan this basic knowledge, do in the radiation with gamma-rays in the silkworm (Bombyx mori) in the hope that can be produced its mutant-mutant of production (natural silk results) higher. Experiments on silkworm is done considering the interests of a very large community Indonesian natural silk production in the recent years. Interest is necessary to get a response and assistance, particularly from graduate-sariana Indonesia, as with this way the needs of the natural silk sebel umnya 100% in -impor from outside-negeri, in whole or in part can disuply of production in the country. Drs. DJOEMANTORO, Dokter Hewan Lektor Kepala Ilmu Kimia Medik Veteriner Fakultas Kedokteran Hewan dan Peternakan Universitas Gajah Mada Y ogyakarta

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BEBERAPA CATATAN MENGENAI......

PEMAKAIAN ISOTOP CARBON (C14) UNTUK MENGUKUR DAYA PRODUKTIVITAS PRIMER DI PERAIRAN INDONESIA. Produktivitos Primary dilaut speed is the result of changes in benda_benda anorganis fotosintese in the process undertaken by the phyto-plankton. Because phyto-plankton is the primary food chain dilaut, the measurement process can use a bookmark on the productivity of water resources. How the measurement of the carbon isotope (14 C) is considered to be the most practical, easy to be done, the results can be quickly and Indonesia dipercaya.Di the isotope dilaut this has started since 1957. results have been obtained shows that the power of productivity on this rival or even exceed the power of productivity diperairan-water areas are. This shows that the results raise the possibility of catching fish in Indonesia is high. APRILANI SOEGIARTO M.Sc dan ANUGERAH NONTJI B.Sc. Ahli Biologi dan Asisten biologi pada Lembaga Penelitian Laut Jakarta

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PEMERIKSAAN AIR SULlNG, DWISULING DAN AQUA ....

DEMINERALISATA TERHADAP Cu, Mn DAN Na DENGAN MENGGUNAKAN ANALISA PENGAKTIPAN NETRON. Traces of Cu, Mn and Na had been determined in tap, distilled, doubl y distilled and demineral ised water using the neutron activation anal ysis technique. Both the water sample and the standard are irradiated in a Reactor with a flux of ± 1012n/em 2/sec. for 4 hours and after adding a Cu-Carrier and HCI, Cu is precipitated as CuS by H2S. Mn is precipitated together with the Mn carrier as Mn02 by oxidation with KCI03, of the filtrate from the Cu precipitation. Na is counted in the filtrate from the Mn precipita tion. The radioactivity of each of these elements is analyzed using a single channel gamma scintillation with a solid 21/2 x 21/2 inc, Nal (Thallium activated) crystal which serves as the detector. The double distilled water from a pyrex glass stil, prepared with the addition of KMnO4 and NaOH with the purpose to free pyrogens, shows to contain Mn and Na which are relatively high. There is possibility that these traces of metals are distilled over. The Na content of distilled water, stored in bottles of ordinary alkali glass is rather high which might be due to the leaching of the. bottle. The Cu content of distilled water, from a copper stil is relatively high which is thought to be due to dissolution especially of the copper condenser. TAN BIAUW SOEN, POEY SENG BOUW dan DJALI AHIMSA *) Laboratorium Rodiophormacy, Pusat Reektor Atom Bandung. Penyelidikon ini dibantu dengan grant dari DURENAS.

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