Judul: Kajian Stok Dan Ketidakpastian Sumber Daya Ikan Tetengkek (Megalaspis cordyla, Linnaeus 1758) Di PPN Karangantu
Abstrak: PPN (Archipelago Fishery Port) Karangantu is located in Kasemen District, Serang city, Banten Province. One of the fishes landed there is Torpedo Scad. The purpose of this research are to assess the stock of the fish using biologi parameter approach and the uncertainty using Monte Carlo model. Torpedo Scad (Megalaspis cordyla) is a bycatch of the fishing gear dogol. Torpedo Scad that was obtained during the research has distribution of length frequency range from 200 to 355 mm. It’s growth coefficients (K) for female and male is 0.2286 and 0.2896. Based on the relationship of Length and weight, female and male fish are allometric negative. The exploitation rate of Torpedo Scad is 15.92%. Based on the exploitation rate, Torpedo Scad catching is still underfishing, because of Torpedo Scad is bycatch
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Judul: Pengelolaan Sumber Daya Ikan Tetengkek (Megalaspis cordyla, Linnaeus 1758) di Pelabuhan Perikanan Nusantara Karangantu- Banten
Abstrak: This research is aimed to determine the optimum allocation of Torpedo scad resources in the PPN Karangantu, Banten. The optimum value that calculated such as level of production, the amount of effort and the value of the benefit of the fish resources. The results showed that have not experienced over exploitation yet. Surplus production models used in this research are the models of Schaefer, Fox, Walter Hilborn, Schnute and Clarke Yoshimoto Pooley. Schaefer models had R2 values that greater than other surplus production models. The value of R2 in this model is 77%. On the actual condition of the catched of 1111 kg/year with a fishing effort of 4,17 trips/year. In the regime of open access management has the highest value of effort but zero benefit. Based on the analysis of the bioeconomy got the sustainable catched (MSY) of 2092 kg/year and fishing effort (Fmsy) by 5,22 trips/year, and the catchs (MEY) of 2110 kg/year and fishing effort (Fmey) 5,21 trip/year. Bioeconomy analysis shows that the value of Factual is smaller than the value of Fmsy and also Fmey. This indicated that the resources of Torpedo scad has not been experiencing over exploitation both biologically and economically.
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Judul: Katalis Zink Ferit Tersubstitusi Cu untuk Oksidasi Benzil Alkohol
Abstrak: Katalis berperan dalam menurunkan energi aktivasi. Katalis ZnFe2O4 dan ZnFe2O4 tersubstitusi Cu disintesis menggunakan metode kopresipitasi untuk digunakan dalam oksidasi benzil alkohol. Katalis dicirikan dengan spektrofotometer inframerah (FTIR) dan difraktometer sinar-X. Spektrum FTIR menunjukkan puncak serapan dari ikatan Zn-O dan Fe-O masing-masing pada rentang 559‒575 cm-1 dan 419‒447 cm-1. Difraktogram menunjukkan terbentuknya fase tunggal Zn0.6Cu0.4Fe2O4 pada katalis ZnFe2O4 tersubstitusi Cu 20%. Benzil alkohol dioksidasi dengan sistem refluks. Konversi benzil alkohol meningkat dengan meningkatnya suhu. Kadar benzaldehida yang dihasilkan dengan katalis ZnFe2O4 tersubstitusi Cu 20% lebih tinggi dibandingkan dengan katalis ZnFe2O4 yang tidak tersubstitusi dan yang tersubstitusi Cu 60 dan 80%. Hal tersebut menunjukkan bahwa katalis ZnFe2O4 tersubstitusi Cu 20% memiliki kinerja yang lebih baik dalam oksidasi benzil alkohol menjadi benzaldehida dengan kadar benzaldehida 8.763%.
Keyword: Benzil alkohol, katalis, oksidasi, ZnFe2O4