Judul: Supplementation of Antioxidants in Polyunsaturated Fatty Acids (PUF A) Status of Local Ewes.
Abstrak: This research was designed to evaluate the effect of antioxidants in high polyunsaturated fatty acids (PUFA) diets to improve reproductive status of ewes. The experiment used completely randomized design with three treatments and five replicates. The treatments based on ration with and without antioxidant (CON). Different types of antioxidants, natural antioxidant form black tea waste extract (BTWE) and commercial vitamin E synthetic (VES). This research was divided into two phases: namely prenatal (pregnancy) and postnatal (after birth until weaning). Variables observed were dry matter intake (DMI) of ewes, average daily gain (ADG) of ewes and lambs, reproductive performance, blood metabolites of ewes, physiological status of ewes, malondialdehyde, and milk quality. Data were tested using Analysis of Variance (ANOVA) and the different among treatment means were examined using Duncan Multiple Range Test. Physiological status of ewes were not affected by antioxidant treatments. DMI in prenatal and postnatal were not affected by treatments. ADG of ewes in prenatal were not affected by treatments, whereas in postnatal, both antioxidant treatments (BTWE and VES) had higher ADG on ewes and lambs compared with CON (P<0.05). During pregnant, all treatments had the same number of embryos, whereas in postnatal, litter size in BTWE was higher than CON and lower than VES. The results indicate that percentage loss of embryos in CON was the highest and VES was the lowest. High litter size at VES had caused lower average birth weight (P<0.05) and higher mortality at birth than the other treatments. After weaning, mortality of BTWE was lower than CON and higher than VES. All treatments produced male dominant of lambs, but CON was the most and VES was the least. Both antioxidant treatments resulted in glucose and cholesterol levels higher than CON during the prenatal and postnatal (P<0.05). In prenatal, both antioxidant treatments were not able to reduce level of oxidation in the body of ewes (as: malondialdehyde parameter), whereas in postnatal, both antioxidant treatments were lower compared to CON (P<0.05), so that ewes with antioxidant treatments had lower level stress than control. Both antioxidant treatments had better milk quality than CON (P<0.05). In conclusion, black tea waste extract could be used as antioxidant to replace vitamin E synthetic in high PUFA rations to improve reproductive status of local ewes.
Keyword: antioxidant, black tea, ewe, sunflower oil, reproduction, vitamin E

Judul: Pengaruh Antioksidan Dalam Ransum Tinggi PUFA Terhadap Konsentrasi Malondialdehyde Induk, Bobot Lahir Dan Mortalitas Anak Domba
Abstrak: This research was conducted to compare the sources of antioxidants on the concentrations of mother malondialdehyde and the appearance of late gestation mother that rations high PUFA with antioxidant and without antioxidant supplementation. This research used completely randomized design (CRD) with 3 treatments and 4 replicates. Treatments that been used were P0 without antioxidant, P1: P0 + vitamin E 500 ppm, and P2: P0 + black tea extract 500 ppm. Parameters observed is the concentration of mother malondialdehyde, nutrient intake, daily body weight gain, feed efficiency, lambs birth weight and mortalitity lambs. Data were analyzed using analysis of variance (ANOVA), if means were significantly different it would be further tested by Duncan multiple range test. Result showed that the suplementation of black tea extract is more effective than vitamin E to decrease the concentration of mother malondialdehyde. The suplementation of antioxidant did not affect to nutrient intake , daily body weight gain , feed efficiency and lambs birth weight.
Keyword: black tea extract, vitamin E, malondialdehyde (MDA), ewes, antioxidant

Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh.
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. ,,,
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular.