Judul: Pengaruh Perubahan Suhu Media Air Pembugaran terhadap Survival Rate dan Glukosa Darah Ikan Mas (Cyprinus Carpio)
Abstrak: Kualitas ikan dapat menurun akibat adanya aktivitas fisik ataupun stress selama proses transportasi. Penelitian ini bertujuan untuk menentukan pengaruh perubahan suhu media air dalam pembugaran ikan mas terhadap survival rate, kadar glukosa darah, serta jaringan mata dan insang ikan mas (Cyprinus carpio). Penelitian ini menggunakan bahan anestesi ekstrak serai 13% yang memiliki rata-rata waktu pingsan terendah yaitu 2,02 menit dan rata-rata waktu pingsan terlama yaitu 2,62 menit. Waktu sadar ikan mas tercepat terdapat pada perlakuan suhu 28ºC dengan nilai yaitu 6,31 menit, sedangkan pada suhu 8ºC didapatkan hasil yaitu 22,76 menit. Pembugaran pada suhu 28ºC meningkatkan nilai glukosa darah sebesar 79,56 mg/dL, sedangkan pada suhu 8ºC hanya 20,78 mg/dL. Nilai survival rate ikan mas dengan perlakuan suhu pembugaran 8ºC dan 28ºC mencapai 100%. Perubahan suhu lingkungan yang terjadi secara tiba-tiba berpengaruh langsung terhadap tingkat stress ikan dan menyebabkan glukosa darah pada ikan semakin tinggi., Fish quality decrease due to physical activity or stress during the transportation process. This study aimed to determine the effect of water temperature changes on the survival rate, blood glucose levels, and eye and gill tissue during carp (Cyprinus carpio) recovery. This study used 13% lemongrass extract which had the lowest induction time of 2.02 minutes and the longest immotilisation time 2.62 minutes. The fastest carp recovery time was found at a temperature treatment of 28ºC for 6.31 minutes, while at 8ºC the result was 22.76 minutes. Recovery process at 28ºC increased carp blood glucose levels up to 79.56 mg/dL, while at 8ºC only 20.78 mg/dL. Nevertheless, the survival rate of carp at both temperatures reached 100%. Drastic environmental changes will have a direct effect on fish stress and increases blood glucose levels.
Keyword: Stunning, lemongrass, rejuvenation, temperature shock

Judul: Effect of Glycerol Injection and Freezing Time on the Survival Rate of Carp (Cyprinus carpio)
Abstrak: Proses transportasi ikan hidup yang kurang tepat menyebabkan ikan mengalami stres, atau bahkan ikan mengalami kematian. Penelitian ini bertujuan menentukan pengaruh gliserol yang diinjeksikan ke dalam tubuh ikan dan lama waktu pembekuan terhadap tingkah laku, kondisi insang dan mata, nilai survival rate, dan kadar glukosa darah ikan mas (Cyprinus carpio). Penelitian ini menggunakan bahan anestesi alami untuk pemingsanan ikan, yaitu minyak cengkeh dengan konsentrasi 125 ppm yang memiliki rata-rata waktu menjelang pingsan yaitu 3.05 menit, dilanjutkan dengan injeksi volume gliserol 0.5 mL, 0.75 mL, dan 1 mL. Gliserol yang diinjeksikan dan lama waktu pembekuan berpengaruh nyata terhadap survival rate dan glukosa darah ikan mas. Penelitian utama menggunakan volume gliserol terbaik 0.75 mL pada ikan yang dibekukan selama 120 menit dengan nilai survival rate yaitu 100% dan waktu beku 150 menit yaitu 77.78%. Kadar glukosa darah ikan mas yang diberi gliserol setelah pembekuan 120 menit, yaitu 121.44 mg/dL dan pembekuan 150 menit, yaitu 151.67 mg/dL., An improper transportation of a live fish causes fish to get stress, or even a death. The objective of this study was to determine the effect of glycerol injected into the fish body and the length of freezing time on behavior, gill and eye conditions, survival rate, and blood glucose levels of carp (Cyprinus carpio). This study used natural anesthetics for stunning fish, specifically clove oil with a concentration of 125 ppm which has an average fainting time of 3.05 minutes, followed by injection of 0.5 mL volume of glycerol 0.75 mL, and 1 mL. The injected glycerol and the length of freezing time significantly affected the survival rate and blood glucose of a carp. The main study used the best glycerol volume of 0.75 mL in fish frozen for 120 minutes with a survival rate of 100% and a freezing time of 150 minutes, which was 77.78%. The blood glucose level of carp that was given glycerol after freezing for 120 minutes was 121.44 mg/dL and for 150 minutes was 151.67 mg/dL.
Keyword: Clove oil, fitness, glycerol, stunning

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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