Judul: Peran perbedaan kation-anion ransum dalam metabolisme mineral dan pH cairan vagina dalm upaya mengubah rasio kelamin anak domba garut
Abstrak: Penelitian ini bertujuan untuk mengetahui (1) Pengaruh perbedaan kationanion ransum (PKAR) yang bernilai negatif, netral, atau positif pada jumlah ransum yang dikonsumsi, metabolisme mineral, status mineral dan pH (pada darah, cairan vagina, dan urin), fetus, anak, dan rasio kelamin anak domba garut. (2) Pengaruh nilai PKAR yang optimal pada jumlah ransum yang dikonsumsi, metabolisme mineral, status mineral dan pH (pada darah, cairan vagina, dan urin), fetus, anak, dan nilai rasio kelamin anak domba garut. Hipotesis penelitian ini, adalah (1) Terdapat pengaruh PKAR pada jumlah ransum yang dikonsumsi, metabolisme mineral, status mineral dan pH (darah, cairan vagina, dan urin), fetus, anak, dan nilai rasio kelamin anak domba garut. (2) Ransum dengan nilai PKAR positif merupakan ransum perlakuan yang akan meningkatkan jumlah ransum yang dikonsumsi, metabolisme mineral, status mineral dan pH (darah, cairan vagina, dan urin), fetus, anak, tetapi menurunkan nilai rasio kelamin anak domba garut.
Keyword: mineral metabolism, mineral status, PH in blood, insemination time, West Java

Judul: Altering physiological conditions and semen acidity by manipulating dietary cation-anion difference and their effect on sperm characteristics of garut breed rams
Abstrak: This study was carried out to evaluate the effect of dietary cation-anion difference (DCAD) and fish oil supplementation on dry matter intake, dry matter and organic matter digestibility, weight gain, acidity of urine, blood and semen, blood gas, plasma mineral, sperm characteristics and ratio of X:Y spermatozoa. The dietary treatmens were as follows: RN0= basal ration (DCAD +14) without fish oil, RNI= basal ration (DCAD +14) with 3% fish oil, RB0= base ration (DCAD +40) without fish oil, RBI= base ration (DCAD +40) with 3% fish oil, RA0= acid ration (DCAD -40) without fish oil, and RAI= acid ration (DCAD -40) with 3% fish oil. The rations contained 150 ppm of zinc and were offered to 18 of Garut breeed rams. The result indicated that: DCAD +40 and -40 decreased dry matter intake significantly. The ration with DCAD +40 had the lowest dry matter intake. No differences were observed for dry matter and organic matter digestibility. DCAD +40 and -40 decreased body weight of rams except RA0 ration, however, the body weight of rams was very low. Variation of urine pH followed the DCAD pattern. Blood pH, pCO2, and pO2 were not affected by DCAD, but cHCO3 and cBase were affected. DCAD affected plasma Mg and S, but did not affect K, Na, Zn and Cl. Semen pH after day 28 of experimental period were significantly different and that followed DCAD pattern. There were not differences for X:Y ratio, macroscopic and microscpic characteristic of sperm.
Keyword: dry matter intake, semen PH, sperm characteristics, basal ration, West Java

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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