Judul: Pemberian Minuman Kopi dengan Penambahan Ekstrak Biji Mahoni (Swietenia mahagoni Jacq.) pada Tikus Wistar yang Diinduksi Aloksan
Abstrak: Degenerative disease such as diabetics requires safe and long-term medical treatments. The aim of this study was to measure blood glucose and liver glycogen status of 15 alloxan-induced Wistar rats which allocated into three groups, namely: (1) mahagony coffee group which had an intervention of coffee beverage with addition of mahogany seed extract, (2) coffee group which had an intervention of coffee beverage without addition of mahogany seed extract, and (3) control group which had no intervention of any coffee beverage. After 21 days of intervention, blood glucose level of control group changed positively, whereas blood glucose level of coffee group and mahagony coffee group changed otherwise. The intervention had an significant difference (p<0.05) to blood glucose level of rats. Blood glucose level of control group was significant difference (p<0.05) with coffee group and mahagony coffee group Nonetheless, blood glucose level between coffee group and mahagony coffee group was no significant difference (p>0.05). Moreover, the 21 days of intervention was given no significant difference (p>0.05) to liver glycogen level.
Keyword: Bogor Agricultural University (IPB), liver glicogen level, blood glucose level, mahogany seed extract, coffee

Judul: Pengaruh Pemberian Ekstrak Etanol Biji Mahoni (Swietenia mahagoni Jacq.) Terhadap Profil Sel β Pankreas pada Tikus Diabetes Mellitus.
Abstrak: The aim of this research was to analyze the effect of ethanol mahogany seeds extract on body weight, total feed consumtion, blood glucose level, the number of beta cells and the islets of Langerhans in the pancreatic tissue of diabetic rats.This study used 25 male rats (Sprague Dawley). The rats were divided into 5 groups: (i) negative control group (K-), (ii) positive control group/diabetes mellitus (DM) (K+), (iii) DM group that was treated with 500 mg/kgBW of the ethanol mahagony seeds extract (EM), (iv) DM group that was treated with acarbose (KO), and (v) non DM group that was treated with 500 mg/kgBW of the ethanol mahagony seed extract (KE). DM condition was obtained by alloxan induction (110 mg/kgBW). The treatments were done for 28 days. Body weight, total feed intake, and blood glucose level were measured during the treatments. At the end of treatments, the pancreas tissues were then obtained and analyzed for the number of beta cells. This study showed that ethanol Swietenia mahagony seeds extract increased body weight, decrease blood glucose level and inhibit the rate of pancreatic β cells damage in the experimental diabetic rats.
Keyword: Mahogany seed extract, diabetes mellitus, beta cells, islets of Langerhans, rats

Judul: Instrumen elektronik berbasis akustik sebagai alat ukur pasang surut air laut
Abstrak: Pengukuran pasang-surut sangat diperlukan sehubungan dengan pemanfaatan data yang diperoleh oleh berbagai bidang ilmu, misalnya oseanografi, geologi, perikanan, clan lain-lain. Dengan memanfaatkan time delay dalam pengukuran jarak target dalam sistem akustik maka dirakitlah peranti elektronik kecil yang dapat mengukur jarak target dimana permukaan air sebagai obyeknya. Metode yang dipakai dalam penelitian ini meliputi beberapa tahap, yaitu tahap perakitan lEP, tahap uji coba di laboratorium clan tahap uji coba di lapang. Pada tahap perakitan lEP dilakukan pengumpulan komponen yang dilanjutkan dengan penyolderan pada Printed Circuit Bord. Pada tahap uji coba di laboratorium dilakukan simulasi pasut pada sebuah bak air berukuran 2 x 2 meter. Tahap yang terakhir adalah pengujian lEP pada keadaan yang sebenarnya dimana permukaan air laut dijadikan sebagai target yang diukur jaraknya ternadap lEP. Melalui hasil uji coba Instrumen Elektronik Pasut (lEP) di laboratorium, diperoleh data bahwa instrumen ini memiliki kisaran deviasi antara 0.40 sampai 0.54. Untuk uji coba di lapang diketahui melalui analisis error yang dilakukan bahwa 1EP memiliki sudut kemiringan garis regresi mendekati 45 derajat yaitu sebesar 45.98 derajat
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