Judul: Penambahan Bakteri Selulolitik Streptomyces untuk Perbaikan Proses Tepung Kasava Terfermentasi
Abstrak: Cassava is an important agricultural commodity in Indonesia. Cassava has a high-carbohydrate contained, so it is often used as food. But have limitations in the utilization due to the presence of acid cyanide (HCN) contained. Fermentation of cassava flouring submerged culture method involving cellulolytic bacteria, lactic acid bacteria (LAB) and yeast is one effort to overcome these problems. This study used a starter microorganisms from cellulolytic bacteria of the genus Streptomyces (KBM 2, KBM 6, KBM 7 and KBM 10), LAB from pickle mustard, and commercial bakery yeast. The result of the conducted selection process, indicated that the KBM 10 had the highest activity on cassava substrat 0,489 nkat/ ml on the second day of incubation. Out of all the fermentation process which is done by some combination of starter, flour quality analysis showed that SBK 3-1 treatment with the addition of 50 ml cellulolytic bacteria in one day fermentation period gives the highest value in whiteness of 88% and a decreasing 99%.
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Judul: Pembuatan Tapioka Asam dengan Penambahan Starter Cair Bakteri Asam Laktat Indigenous
Abstrak: Sour cassava starch is a modified cassava starch produced through submerged fermentation for several weeks followed by sun drying. Lactic acid bacteria is the dominant microorganism and has important role in the fermentation process. The use of indigenous LAB isolate as starter is expected to shorten the fermentation time and maintain its quality. The purposes of this research were to prepare a liquid starter of lactic acid bacteria for the fermentation process, investigate the effect of liquid starter in accelerating the fermentation process and investigate the effect of fermentation time (0, 5, 10, 15, 20 and 25 days) to quality and functional properties of sour cassava starch. A randomized block design was used with fermentation time factor. The addition of liquid starter could accelerate the fermentation process to only 15 days, with the highest expanding capability. Acidifying of cassava starch led to an increase in peak viscosity, but decrease final viscosity of the paste. Acid accumulation could suppress undesirable microorganisms growth, so that it can extend the shelf life of the products.
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Judul: Peramalan enso dan pemodelan hubungan enso dengan curah hujan monsoon
Abstrak: Curah hujan merupakan salah satu paramclcr iklim yang sangal bcrpcngaruh dalam bidang pcrlmlim1. Scdangkan ENSO atau El-Nino SouLl1rc11 Oscillation mcrupakan salah satu faktor global yang dapat mcmpengaruhi kcjadian dan pola curah hujan di Indonesia, khususnya wilayah dcngan tipc curah hujan monsoon. Peramalan pola dan nilai ENSO di masa yang akan datang pcrlu untuk dikctahui, schingga variabilitas kejadim1 curah hujan dapat ditindaklanjuti. Dalam pcnclitim1 ini dipclajari pcngaruh ENSO tcrhadap dacrah ·yang mcmiliki tipc cu rah hujan monsoon dcngan dua ta ha pan analisis. (I) Pcramalan ENSO dan (2) Pcmodclan ENSO dcngan Curah Hujan Monsoon. Pcrmnalan ENSO dcngan mcnggunakan mctodc Gcostatistika dcngan pcndckatan intcrpolasi dan ckstrapolasi analisis kcccndcrugan pcrmukaan, mcnghasilkan nilai pcramalan yang cukup baik bila dibandingkan dcngan pcndckatan mctodc Winters dcngan nilai R2 antara 14.57%1, 79.81%, dan ragam pcrmnalan 1.772146 - 5.295013. Karaktcristik model yang dihasilkan mcnunjukkan pola nilai tckanan dan suhu yang ccndcrung mcningkat dari tahun kc tahun bcrikutnya, kccuali tckanan Tahiti yang ccndcrung turun. Hubungan ENSO dcngm1 cuntl1 hujan monsoon untuk kc-crnun stasiun cukup baik bila didckati dengan rcgresi metode !mad.rat terkccil (OLS dan WLS) dibandingkan regrcsi komponcn utama (Principal Component Regression) . Model yang dihasilkan mcmiliki kcmampuan dcm validasi yang cukup b::iik. Nilai-nilai ramalan kc-cnam model yang ada mampu mcngikuli pola dala aktual untuk tmum I 998. Schingga model ini dapat digm1akan scbagai aJtcrnatif lain dalam pcramaJan curah hujan w1tuk kc-cnam stasiun di masa yang berikut..nya.
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