Judul: Lipid Peroxide Concentration in The Liver of Hyperlipidemic Rabbits Treated by Hypolipidemic Substance.
Abstrak: Degenerative disease has caused the highest mortality in the world. The disease may occur due to our life style which prefer fast food than traditional one and overeating resulted in hyperlipidemic. This condition will increase lipid peroxidation caused by free radicals in the body such as in the liver. The objective of this research is to determine the influence of hypolipidemic substance on lipid peroxide in the liver of hyperlipidemic rabbits. Twenty four male New Zealand White rabbits were divided into four group: group I (normal), group II (Hyperlipidemic), group III (mixture of Jati Belanda), and group IV (lovastatin). Lipid peroxide concentration was measured by TBA (thiobarbiturit acid) assay that measure malondyaldehida (MDA) as product of lipid peroxidation using spectrophotometer at λ = 532 nm (Yagi et al 1994). The result of the research showed that feeding rabbits with chow contains 0.5% cholesterol and 5% of palm oil caused hyperlipidemic. Lipid peroxide concentration of rabbit’s liver in group II increased two times compared with group I. Group III and IV had lower lipid peroxide concentration of rabbit’s liver compared with group II which is 58.83% and 49.06%. This data showed that Jati Belanda leave mixture and lovastatin decreased lipid peroxidation in the liver.
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Judul: IPB (Bogor Agricultural University)
Abstrak: Hypercholesterolemia and LDL oxidation are the major factors of atherosclerosis. The ethanol extract of the ginger (EEG) and Zn each posses effect reduce cholesterol and antioxidant. These research combined EEG and Zn as antihypercholesterolemia and antioxidant to prevent atheroma in New Zealand white fed rabbits atherogenic diet and hypercholesterolemia rabbits. Twenty eight male rabbits were divided into seven groups. For 6 weeks, group 1 was fed with a normal diet and group 3 was fed with an atherogenic diet. Beside the atherogenic diet, group 2,4,5,6, and 7 were also treated by supplementary treatment. Second phase research, 24 male hypercholesterolemia rabbits were divided into 6 groups. For 6 weeks, group 1 was fed with a normal diet. Fed rabbits atherogenic diet group 2,4,5,6, and 7 and hypercholesterolemia rabbits group 2,3,4,5, and 6 were treated by supplementary treatment, which are Zn 6.67 mg/kg, EEG 200 mg/kg, combination EEG 50 mg/kg and Zn 6.67 mg/kg, combination EEG 100 mg/kg and Zn 6.67 mg/kg, and atorvastatin (positive control) 1.9 mg/kb BW per day. Combination EEG 50 mg/kg and Zn 6.67 mg/kg and combination EEG 100 mg/kg and Zn 6.67 mg/kg treatment impeded the increase of total cholesterol, LDL, and prevent atheroma equal to the positive control. Based on the ability to restrain the increase of MDA (lipid peroxidation) in fed rabbits atherogenic diet the treatment with combination EEG 50 mg/kg and Zn 6.67 mg/kg resulted higher than positive control or the other treatment. Based on reduced plaque atheroma in hypercholesterolemia rabbits, combination EEG 50 mg/kg and Zn 6.67 mg/ kg treatment also the best result. These researches concluded that combination EEG 50 mg/kg and Zn 6.67 mg/kg BW per day treatment exhibited the highest atheroma prevention effect in fed rabbits atherogenic diet or hypercholesterolemia rabbits as compared to the positive control or the other treatments.
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Judul: Pemanenan Energi Listrik dari Kincir Angin Vertikal
Abstrak: Usaha pemanenan energi angin di Indonesia masih sedikit. Sampai Tahun 2016 hanya 3.54 MW alat pemanenan energi angin yang sudah terpasang. Kendala utamanya ialah dibutuhkan investasi yang besar untuk membuatnya. Pembuatan kincir angin dengan ukuran yang lebih kecil dengan bahan yang dapat dibeli di pasar lokal menjadi solusi agar pembuatan kincir angin lebih ekonomis. Pembuatan kincir vertikal tipe Savonius dapat menjadi solusinya. Kincir vertikal Savonius dapat beroperasi pada kecepatan < 3 m/s dan ketinggian < 50 m. Kincir angin ini terdiri dari tiga sistem, yaitu generator, rotor kincir dan transmisi pulley-belt. Generator dibuat dari modifikasi motor AC dan magnet neodymium. Rotor kincir dibuat dari pipa PVC 4”, pipa alumunium ¾”, dan papan polikarbonat. Transmisi pulley-belt dibuat dari plastik dan karet. Kincir ini membutuhkan gaya minimal 3 N untuk dapat berputar atau torsi minimalnya 0.75 Nm. Kecepatan angin yang dibutuhkan untuk merotasikannya sebesar 1.9 m/s. Daya maksimal yang dapat dihasilkan ialah 5.76 watt berupa tegangan sebesar 36 volt dan arus 160 mA.
Keyword: energi terbarukan, generator, motor AC, sudu Savonius