Judul: The Effects of Photoperiod towards Weight Gain and Anxiety-Related Behavior on Mice (Mus musculus L.)
Abstrak: Paparan cahaya buatan yang tidak sesuai dengan pencahayaan alami lingkungan diprediksi berdampak pada metabolisme dan kecemasan mengingat kaitan cahaya dalam penyelarasan ritme sirkadian. Meskipun konsekuensi variasi durasi paparan cahaya (fotoperiode) terhadap metabolisme dan kecemasan telah banyak diketahui, kajiannya terbatas pada pengaruh fotoperiode tertentu dengan protokol yang beragam. Penelitian ini mengkaji efek berbagai variasi fotoperiode terhadap pertambahan berat badan dan perilaku terkait-kecemasan sebagai proksi untuk menjelaskan gangguan metabolism dan kecemasan. Sebanyak 15 ekor mencit jantan (Mus musculus L.) berusia empat minggu dibagi menjadi empat kelompok perlakuan fotoperiode (0-, 6-, 18-, dan 24-jam periode terang) dan satu kelompok kontrol (12 jam periode terang). Perlakuan diberikan selama empat pekan didahului satu pekan aklimatisasi. Pengukuran berat badan dan perilaku terkait-kecemasan (open field test dan light-dark box test) dilakukan sebelum dan sesudah perlakuan. Hasil analisis menunjukkan peningkatan berat badan dan perilaku terkait-kecemasan dibandingkan dengan kontrol. Namun, pengaruh yang signifikan secara statistik hanya dijumpai pada perlakuan gelap konstan dan kaitannya dengan peningkatan perilaku terkait-kecemasan, serta tidak pada perlakuan lainnya. Temuan ini menunjukkan bahwa pemeliharaan mencit tanpa cahaya dapat meningkatkan respons kecemasan., Exposure to artificial light that deviates from the environment natural lighting the is predicted to impact metabolism and anxiety, given the light significance in synchronizing circadian rhythms. Despite the bidirectional relationship between varying duration consequences of photoperiod on metabolism and anxiety being well addressed, studies have been limited to the particular photoperiods effect with diverse protocols. This study examined the various photoperiods effect, including omission of light and dark periods and short and long photoperiods, on weight gain and anxiety-related behavior as proxies for explaining metabolic and anxiety. A total of 15 male mice (Mus musculus L.) aged four weeks were divided into four photoperiod treatment groups (0-, 6-, 18-, and 24-hours light period) and a control group (12 hours light period). Measurements of weight and anxiety-related behavior (open field test and light-dark box test) were performed before and after treatment for four weeks, preceded by one week of acclimatization. Housing in these conditions results in accelerated weight gain and anxiety-related behaviors compared to controls. However, a statistically significant effect was found only for constant dark treatment and is associated with many anxiety-related behavior variables but insignificant for the rest. These findings that dark constant can enhance the anxiety response.
Keyword: durasi paparan cahaya, kecemasan, metabolisme, perilaku, ritme sirkadian

Judul: Performa produksi ulat tepung (Tenebrio molitor L.) dengan dan tanpa penambahan cahaya lampu dengan selang penggantian pakan yang berbeda
Abstrak: People believe if lamp was added it will boost mealworm growth, despite mealworm is a nocturnal animal. This reasearch aimed to compare mealworm performances with and without lamp addition in different feed changing interval. This research was done from 2nd of June up to 9'h August 2005, at Non Ruminant and Prospective Animal Division, Animal Production and Technology Departement, Faculty of Animal Science, Bogor Agricultural University. This experiment used 1800 larva which is fed mixed of onggok (75%) and chicken commercial feed (25%). Lights was given for 24 hours with two five watt bulb lights and placed in the middle of experimental boxes. Completely Randomized Design in 3x2 factorial was used as experimental design. The first factor was lights addition: added and not added, and the second was different feed changing interval: every 10,20 or 30 days. Each experiment has three replications so it will have 18 experimental units. The observed variables were feed consumption, body weight and length gain, feed convertion and mortality. The obtained data were analized by Analysis of Variance (ANOVA) and tested by Duncan Multiple Range Test. The result showed that without lamp addition had a significant effect (P<0,05) in the body weight gain. Changing feed every 20 days had a significant effect (P<0,05) in body weight gain and changing feed every 30 days had a significant effect too (P<0,05) in feed conversion based on length gain. The result also showed that there is no interaction between those factor. Keywords: mealworm, lights, feed changing interval
Keyword: 

Judul: Penyusunan Overlap Graph menggunakan Suffix Tree pada DNA Sequence
Abstrak: The DNA sequence assembly is very important in genome analysis. This step aims to reconstruct contigous DNA fragment (contigs) from short fragment by concatenating fragments based on the overlap region among them. This method employs overlap graph for solving the problems. In this graph, nodes represent fragments and edges represent overlap. This research developed a software for constructing overlap graph using suffix tree. The evaluation was conducted by measuring the number of nodes, number of edges, and the execution time in many values of minimum overlap. The minimum overlap is defined as the minimum length of substring which is considered as the overlap region between two fragments. The evaluation results showed that the number of nodes, the number of edges, and the execution time were increased with the decreasing of the minimum overlap value.
Keyword: