Judul: Proses peroksidasi lipid kelinci yang hiperlipidemia pada pemberian senyawa penurun kolesterol
Abstrak: Radikal bebas banyak mendapat perhatian akhir-akhir ini karena dianggap memiliki peran yang cukup signifikan dalam terjadinya berbagai penyakit degeneratif. Hiperlipidemia adalah salah satu faktor resiko aterosklerosis yang mengarah pada penyakit degeneratif tersebut. Penelitian ini bertujuan mengukur konsentrasi lipid peroksida pada darah kelinci yang hiperlipidemia dan pengaruh senyawa penurun kolesterol terhadap konsentrasi lipid peroksidanya. Sebanyak 20 ekor kelinci jantan galur New Zealand white dibagi menjadi empat kelompok percobaan, yaitu kelompok normal yang hanya diberi pakan standar, hiperlipidemia yang diberi pakan aterogenik (kolesterol 0.5% dan minyak kelapa 5%), lovastatin yang diberi campuran pakan aterogenik dan lovastatin (57 mg/hari), dan ekstrak yang diberi campuran pakan aterogenik dan ekstrak ramuan daun jati belanda. Analisis lipid peroksida darah menggunakan metode tiobarbiturat (Yagi 1994) yang mengukur senyawa malonaldialdehida (MDA) menggunakan spektrofotometer pada λ = 532 nm. Hasil percobaan menunjukkan pemberian pakan aterogenik pada kelinci menyebabkan peningkatan konsentrasi MDA, yang berarti meningkatnya proses peroksidasi lipid dalam tubuh. Kelompok hiperlipidemia mengalami peningkatan konsentrasi lípid peroksida darah sebesar 163.76% bila dibandingkan kelompok normal (1.30 ± 0.38 nmol/ml). Lovastatin dan ekstrak ramuan daun jati belanda dapat berperan sebagai antioksidan dengan cara menurunkan konsentrasi lipid peroksida darah sebesar 46.92% dan 53.03% berturut-turut pada minggu ke-8 perlakuan dibandingkan kelompok hiperlipidemia.
Keyword: Peroksidasi, Lipid, Kelinci

Judul: Proses Peroksidasi Lipid Kelinci yang Hiperlipidemia pada Pemberian Senyawa Penurun Kolesterol
Abstrak: Free radicals, such as lipid peroxide, are having much attention right now because their significant role in degenerative disease. Hyperlipidemia is one of the major risk factor for atherosclerosis and lead to degenerative disease. The aim of this study was to determine the effect of cholesterol lowering substance to the blood peroxide lipid concentration in hyperlipidemic rabbit. Twenty four male New Zealand white rabbits were divided into four groups: normal (given standard rabbit feed), hyperlipidemia (given atherogenic rabbit feed contained 0.5% cholesterol and 5% coconut oil), lovastatin (given mixture of atherogenic rabbit feed and lovastatin 57 mg/day), and extract (given atherogenic rabbit feed and jati belanda leaves extract mixture). Thiobarbitnric acid (TBA) method was used in blood lipid peroxide analysis, measuring the MDA product by spectrophotometer at 532 nm. The result showed that the atherogenic rabbit feed caused the elevation of MDA concentration, which means the elevation of lipid peroxidation process. Blood lipid peroxide concentration in hyperlipidemia group increased 163.76% compared with normal group (1.30 ± 0.38 nmol/ml). Lovastatin and jati belanda leaves extract mixture can act as antioxidant which can lowering blood lipid peroxide concentration 46.92% and 53.03% respectively at 8th week compared with hyperlipidemia group.
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Judul: Sistem Informasi Geografis untuk Pola Aktivitas Manusia dengan Pemodelan Data Spatio-Temporal
Abstrak: The human activity in a given time period will shape its pattern. This research develops a spatiotemporal data model to support the prediction of human existence based on activity-pattern and also visualizes the activity locations in a GIS environment. This so-called mobility oriented spatiotemporal data model conceptualizes the spatial and temporal interaction of activity behaviour using the concept of mobility. In other words, activity patterns are conceptualized as a sequence of staying at or traveling between activity locations. The model can support the analysis and queries of activities from different perspectives, i.e. queries can be time-oriented, person-oriented, activity-oriented, and location-oriented. A prototype system based on the activity data modelling is implemented in MySQL 5.0.27 as DBMS with using PhpMyAdmin 2.9.1.1 software. Spatial database is developed with using software QuantumGIS and ArcView. The system could be accessed online through a web browser with MySQL as its database storage and Pmapper framework as the tools used in visualizing the activity locations.The information were provided in the form of activity attribute-data as the user requested and graphical-data (map) which contains information about its activity locations.
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