Judul: Pemanfaatan Kulit Buah Pisang untuk Produksi Enzim Selulase oleh Trichoderma viride, Aspergilus niger dan Asperhilus Oryzae
Abstrak: Kulit pisang mempunyai kandungan selulosa dan karbohidrat yang cukup tinggi sehingga berpotensi untuk dimanfaatkan sebagai substrat (media) pertumbuhan bag; mikroorganisme yang memproduksi enzim selulase. Enzim selulase merupakan enzim yang mampu menghidrolisis selulosa menjadi glukosa. Penelitian ini bertujuan untuk mendapatkan substrat kulit buah pisang dan jenis lcapang terbaik serta waktu fermentasi optimal dalam memproduksi enzim selulase dengan metode fermentasi padat.
Keyword: 

Judul: Pemanfaatan limbah kulit pisang (Musa Paradisiaca) untuk produksi cuka fermentasi
Abstrak: Pisang (Musa paradisiaca) merupakan salah satu komodi- ti hortikultura yang menonjol di Indonesia dengan produksi sekitar dua juta ton tiap tahun. Pemanfaatan pisang untuk konsumsi langsung maupun diolah memberi hasil ikutan limbah kulit pisang yang cukup banyak jumlahnya, padahal kandungan nutriennya masih dapat dimanfaatkan. Dalam penelitian ini kulit pisang dimanfaatkan untuk produksi cuka fermentasi dengan metode pembuatan cuka ini menempuh dua tahap Perancis. Proses fermentasi yaitu fermentasi alkohol dan fermentasi asetat. Pada fermentasi alkohol, kulit pisang setelah ditambah air seberat dua kali berat kulit pisang, kemudian dihancurkan, disaring dan ditambah glukosa dalam jumlah 15 dan 20 persen, lalu diino- kulasikan dengan dua galur Saccharomyces cerevisiae yaitu NRRL Y-2034 dan ragi roti Fermipan. Selama fermentasi diamati perubahan kadar gula, kadar alkohol dan pH yang terjadi selama 9 hari fermentasi. Pada fermentasi asetat diterapkan perlakuan penambahan nutrien, penggoyangan dan penggunaan dua galur Acetobacter aceti yaitu NRRL B-1036 dan biang cuka pasar. Selama fermentasi diamati perubahan kadar alkohol, kadar asam, kadar asam volatil, kejernihan, ...
Keyword: 

Judul: Characteristic of Overshooting Top (OT) Based on  Himawari  8  Satellite  as  a  Convective  Cloud  Feature  that  Generates  Extreme Weather in the Java Island Region
Abstrak: Overshooting Top (OT) is a feature at the top of a convective cloud that is associated with extreme weather. Research on OT in tropical Indonesia is still very limited. The existence of geostationary satellites with wide area coverage and fast frequency observations is useful for observing the fast dynamics of the OT life cycle. Therefore, this study intends to analyze the relationship between OT and extreme weather, updraft and thermodynamic conditions of OT when extreme weather occurs, the best objective method for detecting OT in the day time and night time, and the spatiotemporal distribution of OT in the tropical region of Java Island during the 2018-2021 period. Based on visual analysis using visible channel and Himawari 8 sandwich products, 87% of extreme weather events in Java were accompanied by the appearance of OT. It indicates that the presence of the OT pattern is a convection cloud pattern or feature that is closely related to extreme weather events for the Java Island region. The existence of a time lag between the appearance of OT and extreme weather events on Java Island indicates that the OT of convection cloud can be used as a precursor or nowcasting for the appearance of extreme weather. Most of the convective cloud OT features during extreme weather events on Java Island have altitude that were only able to exceed the altitude of the equilibrium level and few were able to exceed the tropopause level of 9 km – 16 km. The difference in atmospheric conditions during extreme weather events on Java Island, which is in the tropics and subtropics, is a strong and unstable convective energy condition characterized by a larger CAPE, as well as unstable KI, LI, SI and TTI values. It is offset by kinematic factors in the form of a weak vertical wind shear (bulk wind shear 0-6 km) and a higher freezing point height. The difference between extreme weather events in the Java Island region and other tropical regions compared to subtropical regions is the strong updraft speed of convection clouds. The IRW Texture COMB algorithm based on the IRW-Texture Gradient modification and the COMB algorithm shows a significant increase in quality for detecting OT and non-OT pixels in Java. Rainy days with rainfall > 50 mm/day are very common in areas with an altitude of > 500 m. On the other hand, the level of convection activity which is indicated by the presence of OT and lightning is significantly reduced in this area. OT of convective clouds appear more frequently during the DJF season and less frequently during the JJA season. OT often appears during the day time and rarely at night time. Most OTs appear in the central part, away from the south and north coasts of Java Island during the day, while OTs that appear near the south and north coasts of Java Island can appear in the morning or afternoon.
Keyword: convective clouds, extreme weather, Overshooting Tops, Himawari 8 Satellite