Judul: Kecernaan Tepung Eceng Gondok (Eichhornia crassipes) yang Diberi HCl dan Enzim NSP pada Ikan Nila (Oreochromis niloticus)
Abstrak: Kecernaan tepung eceng gondok sebagai pakan ikan dapat ditingkatkan dengan penambahan HCl dan enzim NSP. Penelitian ini bertujuan untuk mengukur kecernaan pakan dengan tepung eceng gondok yang diberi HCl dan enzim NSP pada ikan nila. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 5 perlakuan dan 3 ulangan yaitu kontrol (K), tepung eceng gondok 30% (EG), tepung eceng gondok 30% + HCl (EG HCl), tepung eceng gondok 30% + enzim NSP (EG NSP), dan tepung eceng gondok 30% + enzim NSP + HCl (EG NSP/HCl). Hidrolisis tepung eceng gondok secara kimiawi dilakukan dengan menambahkan 0,2 N HCl sebanyak 4 mL/g, sedangkan perlakuan enzimatis dilakukan dengan menambahkan enzim NSP sebanyak 0,4 g/kg. Ikan nila yang digunakan berukuran 24,08±1,15 g yang ditebar ke dalam akuarium berukuran 50x40x35 cm3 sebanyak 8 ekor/akuarium. Ikan dipelihara selama 30 hari dan diberi pakan perlakuan yang mengandung marker 0,6% Cr2O3 sebanyak dua kali sehari secara at satiation. Berdasarkan hasil penelitian dapat disimpulkan bahwa penambahan enzim NSP 0,4 g/kg dan HCl 0,2 N dapat meningkatkan kecernaan tepung eceng gondok pada ikan nila., Digestibility of flour water hyacinth as fish feed can be increased with the addition of HCl and NSP enzymes. This study aims to measure the digestibility of feed with water hyacinth flour treated with hydrolysis of HCl and enzymatic on tilapia. This study used a RAL design with 5 treatments and 3 replications, namely control (K), 30% water hyacinth flour (EG), 30% water hyacinth flour + HCl (EG HCl), 30% water hyacinth flour + NSP enzymes (EG NSP), and 30% water hyacinth flour + NSP enzymes + HCl (EG NSP / HCl). Chemical hydrolysis of water hyacinth flour was carried out by adding 4 mL/g HCl 0,2 N, while the enzymatic treatment was carried out by adding 0.4 g/kg NSP enzymes. The size of the tilapia used was 24.08±1.15 g, which were spread into a 50x40x35 cm3 aquarium as many as 8 fishes/aquarium. Fish feeding was done by hand until satiation twice a day for 30 days, which the feed containing 0.6% Cr2O3 marker. Based on the results of this study, it can be concluded that addition of the enzym NSP 0,4g/kg and HCl 0,2 N can improve the digestibility of water hyacinth flour in tilapia.
Keyword: HCl, Nile tilapia, NSP enzyms, tepung eceng gondok

Judul: Kecernaan Tepung Daun Tarum (Indigofera zollingeriana) dengan Penambahan Berbagai Dosis Enzim pada Ikan Nila (Oreochromis niloticus)
Abstrak: Penelitian ini bertujuan untuk mengevaluasi efektivitas kecernaan ikan nila (Oreochromis niloticus) terhadap bahan baku tepung daun tarum (Indigofera zollingeriana) yang ditambahkan Enzim NSP+® dengan berbagai dosis. Penelitian menggunakan 4 perlakuan dengan masing-masing 3 ulangan yaitu penambahan Enzim NSP+® pada tepung daun tarum sebanyak 0, 0.2, 0.4, dan 0.6 g.kg-1. Hasil penelitian menunjukkan bahwa penambahan Enzim NSP+® sebanyak 0.6 g.kg-1 menghasilkan kandungan NDF dan ADF yang paling rendah yaitu sebesar 23.89 % dan 18.18%. Selain itu, penambahan dosis Enzim NSP+® 0.6 g.kg-1 menghasilkan kecernaan pakan, kecernaan bahan baku pakan, kecernaan protein, kecernaan lemak, dan kecernaan energi tertinggi yaitu masing-masing sebesar 46.51±0.73%, 37.13±2.43%, 76.88±0.23%, 59.62±3.70%, dan 60.77±0.94% (P<0.05). Penambahan Enzim NSP+® sebesar 0.6 g.kg-1 pada tepung daun tarum (Indigofera zollingeriana) efektif dalam meningkatkan nilai kecernaan ikan nila (Oreochromis niloticus).
Keyword: Daun tarum, enzim NSP+®, kecernaan

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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