Judul: Aktivitas Aminotransferase dan Peroksidasi Lipid pada Tikus Hiperkolesterolemia yang Diberi Ekstrak Jamur Tiram Putih
Abstrak: White oyster mushroom extract contain lovastatin which can be used as anticholesterol agent. But, this extract is thought to be hepatotoxic in certain doses. The aim of this research was to analyze AST and ALT activities and to measure concentration of lipid peroxide in liver of hypercholestrolemic mice induced with white oyster mushroom extract. Animals used in this research were 35 males Sprague Dawley mice that have been divided into five groups, that are normal (N) group, hypercholesterolemia (HK), lovastatin (L), white oyster mushroom extract dose 30 mg/kg BB (E1) and white oyster mushroom extract dose 60 mg/kg BB (E2). Administration of white oyster mushroom extract dose 30 mg/kg BB decreased 32.92% AST activity, 34.73% ALT activity and also lowered 54.05% lipid peroxide concentration than HK group. Induction with white oyster mushroom extract dose 60 mg/kg BB decreased 38.78% AST activity, 24.62% ALT activity and also lowered 17.50% lipid peroxide concentration than HK group. This data showed that the oyster mushroom extract was not affect the function of rat liver and could act as antioxidant.
Keyword: white oyster mushroom, lipid peroxide, enzyme, AST, ALT

Judul: Aktivitas antioksidan dan antihiperkolesterolemia eksuak beta glukan dari Saccharomyces cerevisiae pada tikus putih
Abstrak: The effect of beta glucan extract on total cholesterol level, trigliseride and lipid peroxide were studied in male white rat. The animals had been divided into five groups of treatments which contained six rats in every group : the first group was the rat with normal cholesterol, the 2" had hypemholestemlemia control (20 g/kgBW/day), the 3" group had extract beta glucan from Saccharomyces cerevisiae which isolated from bakers yeast treatment, the 4" group have the same beta glucm treatment yeast of '?ape'' origin and the last group had standard beta lucan treatment ti (1 mg/kgBW/day). Hypercholesterolernia condition reached on day 21 , aRer having been induced with PTU and fed by cholesterolic foods. Cholesterol of hypercholesterolemia control group increased up to 209% compared with the baseline values. The rat weight was increased 13% after treatment. All treated samples had significantly reduced blood lipid peroxide level between 8-50% lower than hypercholesterolemia control group(P<0.05). The hypocholesterolemia effect from the three extracts was revealed on day 2 1' to 28h with significant blood cholesterol reduction (6247%) which were lower than the hypercholesterolemia group (p<0.05). The beta glucan extract the from thee isolates codd repress the increased level of blood cholesterol 20-28% lower than hyperchotesterolemia control group, but it seemed not to be consistent because they could only repress the increasing level by day 7' dan 2gh (pAI.05). At the end of hypercholesterolemia induction the level of cholesterol and trigliseride returned into normal conditions. On this circumstances, the hypercholesterolemia effect of the three isolates was revealed. At the end of research, antioxidant activities of the three extracts was able to reduce the liver lipid peroxide level significantly between 3 1-34% lower than the hypercholesterolemia control group.
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Judul: Mempelajari Model Rancangan Hidrolika Sub Unit Irigasi Curah dengan Tekanan Rendah
Abstrak: Faktor penting dalam keberhasilan penerapan sistem irigasi curah adalah perancangan yang tepat dan efisiensi operasional dari sistem yang dirancang. Desain irigasi curah dilakukan dengan beberapa tahapan. Perhitungan rancangan hidrolika sub unit merupakan tahapan kunci dalam proses desain irigasi curah. Persyaratan hidrolika jaringan perpipaan harus dipenuhi untuk mendapatkan penyiraman yang seragam. Jumlah dan spesifikasi sprinkler (pencurah) maupun jenis dan diameter pipa yang beredar di pasaran sangat beragam. Tahapan rancangan hidrolika sub unit biasa dilakukan dengan metoda coba-ralat (trial-error method). Hal ini cukup rumit dan membutuhkan waktu yang tidak sedikit. Maka dibutuhkan suatu metoda perhitungan rancangan hidrolika sub unit yang sederhana sehingga memudahkan dan meminimalkan kesalahan dalam perancangan irigasi curah.
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