Judul: Studi Histopatologi Kasus Kematian Masal Ikan Lele Dumbo (Clarias gariepinus) di Blitar
Abstrak: Dumbo catfish (Clarias gariepinus) is a species of catfish farming in Indonesia originating from Africa. However, dumbo catfish farming is still have many problem including the mass mortality. Histopathology is one of method to diagnostic fish disease. This report aims to study the histopathological lesion from dumbo catfish mass mortality case at Blitar. The results of this study are expected to provide information about the cause of the mass death in order to prevent the future death in the catfish farming. Histopathology slide of dumbo catfish organs were prepared with hematoxylin eosin (HE), periodic acid Schiff (PAS), Toluidine Blue and Giemsa staining then examined under a light microscope. The lesions were described and the pathogenesis was prepared based on the literature study. There were branchitis, perivascular hepatitis, lymphoid depletion of spleen, enteritis with severe enteromyxosis, cardiomyositis, kidney tubular degeneration, skin and muscular degeneration. The intestine was presumed to have the worst lesion due to myxozoan parasite infection of Enteromyxum spp. The intestinal epithelium showed numerous and various protozoan developmental stages resulting growth disturbances. High fish density accompanied by the discharge of enteritis intestinal content made the decreasing of water quality. In this case, very low dissolved oxygen and high ammonia concentration in the water lead to hypoxia and fish death.
Keyword: Fish mass mortality, Fish histopathology, Fish disease, Enteromyxum spp

Judul: Patologi Ikan Lele Dumbo (Clarias sp) Ukuran Fringerling yang Disuntik Intramuskuler dengan Bakteri Aeromonas hydrophila Galur Virulen
Abstrak: Bakteri Aeromonas hydrophila merupakan agen penyakit yang sering menginfeksi ikan lele, ikan yang terinfeksi oleh Aeromonas hydrophila menunjukkan kelainan dari keadaan normalnya sebelum terjadinya kematian ikan. Derajat keparahan penyakit diantaranya ditentukan oleh virulensi galur bakteri. Aeromonas hydrophila mempunyai banyak galur, untuk itu perlu diketahui galur-galur Aeromonas hydrophila yang virulen serta perubahan-perubahan patologi yang ditimbulkannya. Penelitian ini bertujuan untuk mencari galur Aeromonas hydrophila virulen serta mengetahui perubahan-perubahan patologi yang ditimbulkan akibat infeksi Aeromonas hydrophila galur virulen pada ikan lele Dumbo (Clarias sp) ukuran fingerling.
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Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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