https://www.um.edu.mt/library/oar/handle/123456789/37359 Wed, 08 Apr 2026 14:12:48 GMT 2026-04-08T14:12:48Z https://www.um.edu.mt/library/oar/handle/123456789/37509 Title: CENTRO : volume 1 : issue 2 Editors: Axiak, Victor Abstract: Table of contents: 1/ GRASSO, M., PADLEY, M., REUTHER, C. D. - The geology of the Pelagian Islands and their structural setting related to the Pantelleria Rift (Central Mediterranean Sea) -- 2/ OSMAN, M. M. - Prerequisites for the development of mass balance models of the biogeochemical cycle of mercury in the Mediterranean Sea -- 3/ VILICIC, D. - A phytoplankton study of Southern Adriatic Waters near Dubrovnik for the period from June 1979 to July 1980 -- 4/ SATSMADJIS, J., IATRIDIS, B. - Gas chromatographic determination of organochlorines in biota by preliminary fractionation on conditioned silica gel column Tue, 01 Jan 1985 00:00:00 GMT https://www.um.edu.mt/library/oar/handle/123456789/37509 1985-01-01T00:00:00Z https://www.um.edu.mt/library/oar/handle/123456789/37504 Title: Gas chromatographic determination of organochlorines in biota by preliminary fractionation on conditioned silica gel column Authors: Satsmadjis, John; Iatridis, Basil Abstract: A complete method is described for the reliable determination in animal tissues of polychlorinated biphenyls (PCBs), aldrin, p,p -DDE, heptachlor, o,p -DDT, p,p -DDT, p,p -DDD, CI. -BHC, Y -BHC (lindane), heptachlor epoxide, dieldrin and endrin. It aims at over coming a plethora of difficulties, the gravest of which deal with analytes loss and alteration, interference, identification, fouling of the column and the detector of the gas chromatograph, non-linear response of the latter and contamination. It comprises hexane extraction, removal oflipids on an alumina column, separation into six fractions on a silica gel column and injection into a gas chromatograph equipped with a 6.3Ni electron capture detector. Special attention is paid to the conditioning of the silica gel column and the identification of all the peaks, including those of th e PCBs. Tue, 01 Jan 1985 00:00:00 GMT https://www.um.edu.mt/library/oar/handle/123456789/37504 1985-01-01T00:00:00Z https://www.um.edu.mt/library/oar/handle/123456789/37503 Title: A phytoplankton study of Southern Adriatic waters near Dubrovnik for the period from June 1979 to July 1980 Authors: Vilicic, Damir Abstract: The spatial and temporal dynamics of populations, as well as the biomass expressed as the total cell volume of particular size and taxonomical categories of phytoplankton in the southern Adriatic near Dubrovnik were investigated. All analyses were based on 100 plankton net samples and 310 Nansen bottle samples taken at 9 stations. The phytoplankton parameters, such as distribution of species, distribution of phytoplankton cell density and biomass, as well as species diversity were used for the ecological characterization of the investigated area. A total of 284 microplankton taxons were determined. The microplankton quantity ranged from 2.2 x 102 to 4.0 X 106 cells/ I, and 9.2 x 105 to 7.6 X 109 j.Lm3/1 respectively. The nanoplankton ,;ell density ranged between 6.2 x 104 and5.2 x 106 cells/I, and cell volume between 3.9x 106 and 9.1 x 108 j.Lm3 /1. The most frequent values of the Shannon and Weaver diversity index ranged between 3 and 4 at open sea stations and between 2 and 3 at coastal stations. Tue, 01 Jan 1985 00:00:00 GMT https://www.um.edu.mt/library/oar/handle/123456789/37503 1985-01-01T00:00:00Z https://www.um.edu.mt/library/oar/handle/123456789/37475 Title: Prerequisites for the development of mass balance models of the biogeochemical cycle of mercury in the Mediterranean Sea Authors: Osman, Mohsen M. Abstract: The information presently available on the biogeochemical cycle of mercury in the Mediterranean Sea is reviewed in an attempt to evaluate our state of knowledge, to pinpoint gaps in our understanding and to assess the possibility of establishing mass balance models. The need to promote such models for either the large scale Mediterranean system or individual small scale coastal basins have been discussed. The basic requirements to facilitate the development of mass balance models for both scales were identified. Tue, 01 Jan 1985 00:00:00 GMT https://www.um.edu.mt/library/oar/handle/123456789/37475 1985-01-01T00:00:00Z