Judul: Addition of Whiteweed (Ageratum conyzoides) to Improve Water Quality Media and Survival Juvenile Patin Fish (Pangasionodon hypopthalmus) in a Closed Transportation System
Abstrak: Produksi ikan patin (Pangasionodon hypopthalmus) di beberapa daerah belum optimal, diperlukan kegiatan transportasi ikan dalam rangka meningkatkan produksi patin di berbagai daerah. Daun bandotan (Ageratum conyzoides) diketahui memiliki kegunaan dalam transportasi ikan. Tujuan penelitian ini adalah menganalisis penambahan daun bandotan terhadap peningkatan kualitas air media dan sintasan juvenil ikan patin pada transportasi tertutup. Penelitian ini menggunakan rancangan acak lengkap terdiri atas tiga perlakuan dan tiga ulangan. Perlakuan terdiri dari kontrol (K), perlakuan dosis 1 g/L (B1), dan perlakuan dosis 2 g/L (B2). Hasil penelitian menunjukkan penambahan daun bandotan tidak berpengaruh nyata terhadap kualitas air dan sintasan namun dapat menurunkan konsentrasi glukosa darah ikan pada saat transportasi. Penambahan daun bandotan 1 g/L memiliki keuntungan ekonomi yang paling besar. Berdasarkan penelitian ini, dosis terbaik dalam penambahan daun bandotan pada media transportasi yaitu 1 g/L., Production of Asian catfish (Pangasionodon hypopthalmus) in some areas is not optimal, fish transportation activities are needed in order to increase catfish production in various regions.. Whiteweed (Ageratum conyzoides) are known to have been benefits in fish transportation. The purpose of this study was to analyze the addition of whiteweed to the improvement of water quality media and juvenile survival of catfish in closed transportation. This study used a completely randomized design consisting of three treatments and three replications. The treatments consisted of control (K), treatment dose 1 g/L (B1), and treatment dose 2 g/L (B2). The results showed that the addition of whiteweed did not significantly affect the survival rate and water quality but could reduce the blood glucose concentration of fish during transportation. The addition of 1 g/L whiteweed has the greatest economic advantage. Based on this research, the best dose for adding whiteweed to transportation media is 1 g/L.
Keyword: Ageratum conyzoides, Pangasionodon hypopthalmus,, Survival, Transportation, Water quality

Judul: Penambahan Ekstrak Daun Jambu Biij (Psidium guajava) untuk Meningkatkan Kualitas Air dan Sintasan Benih Ikan Patin (Pangasionodon hyppophthalmus) pada Transportasi Ikan Sistem Tertutup
Abstrak: Stress adalah salah satu faktor utama yang menyebabkan kematian ikan selama masa transportasi. Pemberian ekstrak daun jambu biji diharapkan menjadi alternatif solusi masalah tersebut. Penelitian dilakukan dengan tujuan untuk menganalisis penambahan ekstrak daun jambu biji (Psidium guajava) ke dalam media air pada transportasi benih ikan patin (Pangasionodon hyppophthalmus) sistem tertutup terhadap kualitas air dan sintasan ikan. Penelitian menggunakan rancangan acak lengkap terdiri atas tiga perlakuan dan tiga ulangan. Perlakuan menggunakan ekstrak daun jambu biji dengan konsentrasi 0%, 0,5%, dan 1%. Transportasi dilakukan selama 24 jam. Hasil penelitian ini menunjukkan bahwa penambahan ekstrak daun jambu biji secara statistik tidak memberikan pengaruh nyata pada transportasi benih ikan patin, namun demikian pada konsentrasi 1% dapat mengurangi abnormalitas yang terdapat pada histologi insang dan memberikan keuntungan ekonomi yang lebih besar., Stress is one of the main factors causing fish mortality during transportation. Giving guava leaf extract is expected to be an alternative solution to this problem. The research was conducted with the aim of analyzing the addition of guava leaf extract (Psidium guajava) to water media in a closed system of juvenile patin fish (Pangasionodon hyppophthalmus) transportation on water quality and fish survival rate. The study used a completely randomized design consisting of three treatments and three replications. The treatments were using guava leaf extract with a concentration of 0%, 0.5%, and 1%. Transportation is carried out for 24 hours. The results of this study indicate that the addition of guava leaf extract statistically does not have a significant effect on the transportation of juvenile Asian catfish, however at a concentration of 1% it can reduce the abnormalities in gill histology and provide a greater economic benefits.
Keyword: gill histology, Pangasionodon hyppophthalmus, Psidium guajava, transportation, water quality

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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