Judul: Mempelajari sifat-sifat fungsional telur penyu (Chelonia mydas)
Abstrak: Tujuan dari penelitian ini adalah untuk mempelajari pengaruh pH, garam (NaCl), dan gula (sukrosa) terhadap daya koagulasi, daya buih dan sifat mengemulsi telur pe- nyu. Pengamatan terhadap sifat mengemulsi dilakukan untuk kuning telur, daya buih untuk putih telur, dan daya koagu- lasi untuk putih dan kuning telur. Hasil yang diperoleh menunjukkan bahwa putih telur penyu tidak dapat terkoagulasi sempurna seperti telur a- yam. Suhu maksimum yang dapat dicapai merupakan titik didih dari larutan putih telur tersebut. Kenaikan pH da- ri 7-ll atau kenaikan konsentrasi sukrosa akan menaikkan suhu awal koagulasi putih telur, dimana pada pH 11 tidak terlihat lagi timbulnya kekeruhan. Sebaliknya NaCl akan menstimulir proses koagulasi dengan menurunkan enurunkan suhu a- wal koagulasi. Dari pengamatan terhadap daya buih putih telur pe- nyu diperoleh bahwa waktu pengocokan yang optimum adalah selama lima menit, dimana adanya sukrosa dalam larutan putih telur akan meningkatkan waktu yang dibutuhkan untuk ...
Keyword: 

Judul: Pengaruh Asam dan Garam Asam Terhadap Daya Buih dah Kestabilan Buih Putih Telur Itik Tegal
Abstrak: Penelitian ini dilakukan di Laboratorium Fisiologi dan Farmakologi, Fakultas Kedokteran Hewan, Institut Pertanian Bogor, selama 10 hari sejak tanggal 25 hingga 5 Juli 1987. Jun i Tujuan penelitian ini ialah untuk mengetahui bedaan pengaruh akibat pemberian jeruk nipis, asam per- si- trat lima persen, asam asetat lima persen, atau "cream of tartar" terhadap daya buih dan kestabilan buih pu- tih telur itik Tegal. Data yang dicatat adalah berat jenis putih telur, pH awal putih telur, pH akhir putih telur, volume buih, bobot buih, dan volume tirisan buih per jam. Kenormalan sebaran respons dianalisis dengan uji Lilieforce kemudian respons ditransformasi menjadi nilai Varc sin. Rancangan percobaan yang digunakan ialah analisis kovarian dalam rancangan acak lengkap dengan 13 perlakuan dan enam ulangan. Perlakuan terse- but adalah 0.50 cc, 0.75 cc dan 1.00 nipis; 0.50 CC, persen; 0.50 cc, CC air jeruk 0.75 cc dan 1.00 cc asam sitrat lima 0.75 cc dan 1.00 cc asam asetat lima persen; serta 0.25 gram, 0.50 gram dan 0.75 gram "cream of tartar". Tiap-tiap perlakuan ditambahkan ke dalam 30 gram putih telur itik Tegal. Untuk mengetahui per- bedaan pengaruh antar perlakuan asam atau garam asam digunakan uji jarak Duncan. Hasil penelitian menunjukkan bahwa penyimpanan te- lur itik Tegal selama tujuh hari menambah pH putih lur dari 7.6 menjadi sekitar 8.7 - 10.2. Putih te- telur tersebut mempunyai pH yang homogen serta menghasilkan daya buih sekitar 607.427 837.729 persen dan bilan buih antara 40.398 - 62.608 persen. kesta- Dibandingkan dengan kontrol penambahan air nipis, asam sitrat lima persen, atau 1.00 CC jeruk asam asetat lima persen nyata mengurangi daya buih sedangkan penambahan 0.50 cc asam asetat lima persen, 0.75 asam asetat lima persen, atau "cream menghasilkan daya buih yang tidak berbeda. of CC tartar" Penambahan air jeruk nipis 0.50 cc, 0.75 cc, atau CC masing-masing mengurangi daya buih sebesar 1.00 126.217 persen, 165.976 persen, dan 227.258 persen. Pemberian asam sitrat lima persen menghasilkan pe- ngaruh yang serupa dengan air jeruk nipis. Penambahan asam 1.00 sitrat tersebut sebanyak 0.50 cc, 0.75 CC 140.467 cc, atau mengurangi daya buih masing-masing sebesar persen, 156.294 persen, dan 172.525 persen....
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