Judul: Pengaruh pemberian kromium organik terhadap kinerja pertumbuhan ikan bawal air tawar (colossoma macropomum)
Abstrak: Penelitian ini dilakukan untuk mengevaluasi pengaruh pemberian kromium organik terhadap kinerja pertumbuhan ikan bawal air tawar. Penelitian ini menggunakan 5 perlakuan pakan uji yang terdiri dari 4 kadar kromium (0.0; 1.5; 3.0; dan 4.4 ppm Cr+3) dengan isoprotein (37.5%) dan isoenergi serta satu pakan mengandung 2.2 ppm Cr+3 dan kadar protein 30.3%. Dua puluh ekor ikan dengan bobot rata-rata individu 11.34 - 12.31 g dipelihara dalam setiap akuarium (volume air 100 lt). Ikan diberi pakan dua kali sehari (pagi dan sore hari) secara at satiation selama 60 hari. Hasil penelitian memperlihatkan bahwa pemberian pakan yang mengandung kromium organik akan mengefisienkan penggunaan karbohidrat sehingga retensi protein dan efisiensi pakan meningkat serta menekan katabolisme protein sehingga amonia yang diekskresikan rendah, sedangkan laju pertumbuhan harian (LPH) sama (p>0.1). Pemberian kromium organik juga meningkatkan kadar glikogen hati dan daging (p<0.05) serta rasio RNA/DNA (p<0.1). Kadar 3.0 ppm Cr+3 dalam pakan menghasilkan respon terbaik pada ikan bawal ikan air tawar (C. macropomum).
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Judul: Pengaruh Pemberian Kadar Kromium yang Berbeda dalam Pakan Terhadap Kinerja Pertumbuhan Ikan Baung ( Hemibagrus nemurus Blkr)
Abstrak: This experiment was conducted to determine the effect of dietary chromium on the growth performance of baung fish (Hemibagrus nemurus Blkr). Thisa experiment used four diets containing different level of chromium yeast (0.0,1.47,3.20, and 4.59 ppm kg-1). Twenty fish with the initial body weight 7.0 ± 0.2 g were placed in each aquarium (50x40x35 cm). Fish fed on the experimental diets three times daily at station for 60 days. Results of this experiment showed that chromium diets produced body protein level, ratio RNA/DNA and protein retention higher than that of non chromium diet. However, diet contained 3.20 ppm chromium yeast produced the highest protein deposition, and produced the highest daily growth rate and feed efficiency. The liver and carcass glikogen level increased as the chromium level of diet was elevated, on the other side, body lipid level decreased as the chromium level of diet was elevated
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Judul: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
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