Judul: Uji aktivitas antibakteri patogen dan penggandaan skala pada minuman asam laktat bervitamin B12 dari sari wortel
Abstrak: Selama ini bahan nabati, terutama wortel, lebih banayk dikonsumsi dalam bentuk segar sehingga mempunyai nilai ekonomis yang lebih rendah di banding dengan bahan hewani. Melalui proses pengolahan diharapkan mampu meningkatkan nilai ekonomis wortel. Salah satu proses pengolahan dilakukan dengan fermentasi asam laktat. Tujuan penelitian ini adalah untuk memproduksi minuman sehat bervitamin B12 dari sari wortel yang mempunyai kemampuan sebagi antibakteri patogen, terutama penyebab diare.
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Judul: Pemanfaatan ekstrak ubi jalar (Ipomoea batatas) sebagai minuman asam laktat bervitamin B 12 melalui proses fermentasi
Abstrak: Penelitian ini bertujuan memanfaatkan ekstrak ubi jalar untuk produksi minuman asam laktat dengan penambahan Propionibacterium freudenreichii sebagai penghasil vitamin B₁₂ melalui proses fermentasi. Penelitian pendahuluan terbagi menjadi dua tahap yaitu tahap pertama mencari pengenceran terbaik dengan perbandingan bahan dan air adalah 1: 1 dan 1: 2, serta menurunkan kadar pati dari ekstrak ubi jalar dengan perlakuan dekantasi selama 0, 2, dan 4 jam pada suhu 10°C dan 25°C. Dari tahap ini diperoleh pengenceran terbaik 1:1 dengan total padatan 3,50 persen; pH 5,73 dan viskositas 1,0440 Cps. Sedangkan dekantasi terbaik dilakukan pada suhu 25°C selama 4 jam dengan kadar pati 2,7969 persen. Pada tahap kedua dilakukan adaptasi media pada ekstrak ubi jalar dengan membuat kultur induk, kultur antara dan kultur kerja dengan cara menambahkan skim 10 persen dan glukosa 3 persen pada ekstrak ubi jalar dan diinokulasikan dengan bakteri Lactobacillus bulgaricus (Lb) dan Streptococcus thermophillus (St) serta Lactobacillus casei galur rhamnosus (Lc). Setelah itu dilakukan pembuatan minuman fermentasi dengan penambahan bakteri LbSt dan Lc dengan perlakuan penambahan skim 7 dan 10 persen serta glukosa 0, 2 dan 3 persen. Dari hasil uji organoleptik didapatkan produk yang paling disukai untuk LbSt adalah penambahan skim 7 persen dan glukosa 3 persen sedangkan produk Lc penambahan skim 10 persen dan glukosa 3 persen....
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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