Judul: Pemanfaatan Selulosa Larut Air Panas dari Frond Sagu sebagai Bahan Baku untuk Produksi Selo-oligosakarida
Abstrak: Frond sagu adalah bagian pucuk batang sagu dan merupakan hasil samping dalam tahap pemanenan sagu. Frond sagu mengandung serat dengan struktur lignoselulosa muda yang belum sempurna sehingga sebagian komponen selulosanya dapat larut dalam air panas. Selulosa larut air panas tersebut berpotensi menjadi bahan baku dalam produksi selo-oligosakarida tanpa melalui proses delignifikasi. Selo-oligosakarida turunan selulosa dapat bertindak sebagai prebiotik dalam saluran pencernaan manusia. Penelitian ini mencakup ekstraksi selulosa larut air panas dari frond sagu dan pemanfaatannya untuk produksi selo-oligosakarida. Selulosa larut air panas dihidrolisis dengan enzim selulase konsentrasi 5, 10, 25, 50 U/g substrat. Hasil memperlihatkan bahwa fraksi 3 frond sagu menghasilkan rendemen ekstrak selulosa larut air panas tertinggi (18.76% basis kering). Hasil hidrolisis berupa selopentaosa tertinggi didapatkan dari perlakuan konsentrasi enzim 25 U/g substrat selama 3 jam dengan konsentrasi 3345.81 ppm dan derajat polimerisasi rata-rata 2.58. Konsentrasi tertinggi selobiosa didapatkan dari perlakuan konsentrasi enzim 25 U/g substrat selama 6 jam dengan konsentrasi 248.4 ppm dan derajat polimerisasi rata-rata 1.64.
Keyword: frond sagu, selo-oligosakarida, selulosa larut air panas

Judul: Hidrolisis Pati dari Empulur Sagu dan Ampas Sagu untuk Produksi Sirup Glukosa
Abstrak: Sago starch is extracted from the pith of sago trunk, while sago hampas is solid waste generated sago starch processing. Sago hampas still contained some starch which depends on the extraction technique. In glucose syrup production, only starch components are hydrolysis by using acid and enzyme. The objectives of this research are to investigate the direct hydrolysis of sago pith and utilization of sago hampas for glucose syrup production, compared to native sago starch. The results showed the high amount of starch in sago pith (86,0%) and sago hampas (55,3%). Glucose syrup produced from enzymatic hydrolysis has higher dextrose content (DE 71-74) compared to acid hydrolysis (DE 33-42). Glucose syrup produced from sago pith and sago hampas have similar characteristic with glucose syrup produced from native sago starch, but with lower yield.
Keyword: enzymatic hydrolysis, acid hydrolysis, sago starch, sago hampas, sago pith

Judul: Perilaku Remaja dalam Mendengarkan Radio Komunitas (Kasus Pendengar BeTe Radio di Kelurahan Tegal Gundil, Kecamatan Bogor Utara, Kota Bogor, Provinsi Jawa Barat)
Abstrak: This research aimed to analyze the relation between teenager behaviors on community radio listening activity. This research goals are (1) to identify the pattern of listening activity on community radio among teenager (2) to analyze the relation between listeners characteristics and broadcast format assessment by listening community radio (3) to analyze the relation between community radio listeners pattern with the teenager behaviors, and (4) to identify the listeners expectations towards community radio. The main method of this research is quantitative approach, and qualitative approach as supporting. Research and observationshow that the teenagers who are listening to the BeTe community radio have low level of listening activity pattern. Affective level and social network were also relatively low. Related to the listeners characteristics, the research result showed that gender does not have any relation with the pattern of radio listening activity. Beside that, age, media ownership, and main activities have significant relation towards pattern of radio listening activity. To assess broadcast format variable, pshycological proximity does not have any relation significantly with the pattern of radio listening activity. In the pattern of radio listening activity variable which is consist of listening frequency, listening duration, program choices, participation on the program have significant relation with to point of view, affective, and social network of BeTe Radio listeners.
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