Judul: Analisis Nutrien dan Fitokimia Tanaman Murdannia bracteata serta Pengaruhnya pada Karakteristik Fermentasi Rumen
Abstrak: The aim of this study was to evaluate nutrients and phytochemicals composition of MB and its effect on the characteristics of ruminal fermentation. Nutrients evaluation included proximate, van soest, mineral, chlorophyll, tannin and saponin analysis. In vitro fermentation by using a randomized block design with 4 treatments (Murdannia bracteata (MB), Pennisetum purpureum (PP), Panicum maximum (PM), Brachiaria humidicola (BH)) was applied. Parameters measured were organic and dry matter digestibility (OMD, DMD), amonia and VFA production. The results showed that dry matter content, crude fiber, and NDF of MB was lower but mineral content was higher than other forages. The tannin content of MB was relatively lower than PP but higher than PM and BH. The saponin content of MB was relatively lower than BH, but higher than PP and PM. The total chlorophyll content of MB was 1.0603 mg g-1.OMD and DMD of MB was highest (P<0.01) than other forages. Ammonia concentration and total VFA production of MB was similar (P>0.05) among treatments
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Judul: Respon Tanaman Murdannia bracteata terhadap Aplikasi Pupuk Organik dan Naungan
Abstrak: Murdannia bracteata is one of potential forage for ruminants have not been studied. The aim of this study was to determine plant growth an productivity of Murdannia bracteata on different shading and organic fertilizer level. The experiment was arranged in split-plot design. The main plot was shading level (0%, 37%, 60%) and sub-plot was organic fertilizer dosage (0 ton ha-1, 5 ton ha-1, 10 ton ha-1). The resulted showed that the highest light intensity at 12.00 p.m. and the lowest at 15.00 p.m. Leaf area and chlorophyll were increased significantly (P<0.05) by increasing of shading level. Leaves, leaf ratio, flowers, and fresh weight of edible and non-edible were increased significantly (P<0.05) by increasing of organic fertilizer dosage. Plant height, tillers, and dry weight of edible were not significantly different (P>0.05) on different shading level and organic fertilizer dosage. There is no interaction effect of shading level and organic fertilizer dosage.
Keyword: organic fertilizer, shade, Murdannia bracteata

Judul: Desain Sistem Transfer Energi Nirkabel Berbasiskan Tesla Coil
Abstrak: Tesla coil merupakan alat yang ditemukan oleh Nikola Tesla yang dapat mentransmisikan daya tanpa kabel dengan memanfaatkan prinsip induksi elektromagnetik. Pada penelitian ini dibuat sebuah prototype Tesla Coil dengan menggunakan transistor C1970 dan receiver menggunakan rangkaian LC. Identifikasi alat meliputi pengaruh daya input transmitter terhadap receiver, bentuk signal yang dipancarkan transmitter, pengaruh jarak transmitter dan receiver, nilai efisiensi serta efek alat terhadap perangkat lain. Hasil pengamatan menunjukkan bahwa semakin besar daya input maka semakin besar daya yang dipancarkan oleh transmitter. Bentuk sinyal yang dipancarkan oleh transmitter berupa gelombang listrik AC sinusoidal dengan frekuensi ~2.9 MHz. Semakin jauh jarak receiver terhadap transmitter maka semakin kecil amplitudo gelombang AC yang diterima oleh receiver, menyebabkan semakin kecil daya yang diterima oleh receiver. Adapun nilai efisiensi terbesar penangkapan daya oleh receiver yaitu sebesar 0.00516 % serta terdapat gangguan pada alat-alat tertentu seperti monitor komputer dan radio.
Keyword: rangkaian LC, receiver, tesla coil, transistor C1970, transmitter