Hasil Pencarian  ::  Simpan CSV :: Kembali

Hasil Pencarian

Ditemukan 113464 dokumen yang sesuai dengan query
cover
"The objective of this research was to reduce coconut sugar melting by enhancing glass transition temperature (Tg). Silicone dioxide (SiO2) and magnesium carbonate (MgCO3) were added before the coconut sugar was formed. Concentrations of SiO2 and MgCO3 were 0.5 %, 1.0 %, and 1.5 % respectively. Analysis was conducted for solidification temperature, moisture content, water activity, and glass transition temperature of coconut sugar. In this research, the glass transition temperature or coconut sugar was measured with differential thermal analyzer (DTA). The result showed that the addition of SiO and MgCO3 was not influenced toward moisture content of coconut sugar, but water activity was decreased. The solidification temperature and glass transition temperature were increased. The best coconut sugar was produced by addition of 1.5 % SiO3 with solidification temperature 72.67 °C, water activity 0.5, and glass transition temperature 70.45 °C "
580 AGR 19 (1-4) 2006
Artikel Jurnal  Universitas Indonesia Library
cover
Wuwut Riza Fauli
"Pada proses pengeringan semprot apabila temperatur pengeringan terlalu rendah maka yang terjadi pada bahan cenderung mengalami kelengketan dan partikel serbuk menggumpal. Tomat memiliki moisture content yang rendah tetapi memiliki kadar gula dan likopen yang tinggi sehingga dalam proses pengeringan semprot diperlukan maltodextrin sebagai zat pengikat nutrisi dalam tomat yang berfungsi untuk meningkatkan temperatur gelas transisi (Tg) dan mengurangi kelengketan. Temperatur gelas transisi yang tinggi mampu mengurangi kelengketan. Temperatur transisi gelas (Tg) yang terlalu tinggi akan cepat mengering tetapi partikel bahan akan amorf membentuk kristalisasi dan Tg yang terlalu rendah partikel akan melumer dan lengket. Kondisi droplet untuk temperatur pengeringan jika diatas Tg akan lengket tetapi jika temperatur pengeringan dibawah Tg maka droplet akan kering. Analisa perhitungan temperatur transisi gelas untuk larutan tomat adalah 22,8 °C.

Spray drying of process if too low drying temperature then occur at substance inclined particle stickiness and agglomerate. Tomato has low moisture content but have to high sugar value and lycopene until process to spray drying needful maltodextrin as nutrition essence on tomato which serves to increase glass transition temperature (Tg). High glass transition temperature (Tg) capable reducing stickiness. Very high glass transition temperature will running dry faster but matter of particle will amorphous crystallization shaping and very low glass transition temperature so particle will be melting and stickiness. Droplet conditions for drying temperature if above of Tg will stick but if the drying temperature is below of Tg so droplet will dry. Analysis calculation glass transition temperature for tomato liquids is 22,8 °C."
Depok: Fakultas Teknik Universitas Indonesia, 2013
S44066
UI - Skripsi Membership  Universitas Indonesia Library
cover
Suci Winarsih
"The change of the electric and magnetic properties due to the particle size effect has been reported recently and opened a new door to investigate phenomena driven by dimensional effects. One of the interesting examples is nanogold which is a weak diamagnetic in a bulk state but it becomes ferrimagnetic when the size of the Au cluster is around 3 nm. In the case of the Mott insulating system, it is reported that the magnetic transition temperature, TN, drastically decreased due to nano-sized effects. The reason for the appearance of the ferrimagnetic phase and the reduction in TN are not fully understood and still an open question. We investigated nano-sized effects in typical Mott insulator, La2CuO4, and in high-Tc superconductor cuprates, La2-xSrxCuO4. From muon spin relaxation (μSR) measurements, it is observed that the TN drastically decreased to be 47(12) K with reducing the particle size of La2CuO4 down to 24 nm. The phase separation of long-range and short-range magnetic ordering state was observed. We proposed a core-shell model to describe it. Particle size affects the magnetic interaction in La2CuO4 where the inter-plane magnetic interaction, J’, plays an important role in controlling TN of antiferromagnets. In the case of La1.80Sr0.20CuO4, we found that there is a strong suppression of the superconducting state and the appearance of weak magnetism induced by nano-sized effects. These results revealed that magnetic orders and superconductivity are intertwined and interconnected in high-Tc cuprate superconductors.

Perubahan sifat listrik dan magnet yang disebabkan efek ukuran partikel telah diteliti secara intensif akhir-akhir ini dan membuka pandangan baru dalam investigasi fenomena yang di-drive oleh efek dimensi. Salah satu contoh efek partikel yang sangat menarik adalah nano-gold. Gold (Au) bersifat dimagnetik lemah dalam keadaan bulk tetapi menjadi ferrimagnetik saat ukuran cluster Au dikecilkan menjadi 3 nm. Di kasus sistem Mott insulating, suhu transisi magnetik, TN, dilaporkan menurun karena nano-sized effects. Alasan munculnya fasa ferrimagnetik dan menurunnya TN di sistem nano masih belum dipahami sepenuhnya dan masih menjadi pertanyaan. Kami menginvestigasi nano-sized effects di typical Mott insulator, La2CuO4, dan high-Tc superconductor cuprates, La2-xSrxCuO4. Dari hasil pengukuran muon spin relaxation (μSR), dihasilkan bahwa TN menurun drastis menjadi 47(12) K dengan dikecilkannya ukuran partikel menjadi 24 nm. Dari hasil μSR, teramati juga adanya pemisahan fasa antara long-range dan short-range magnetic ordering. Core-shell model diajukan untuk menjelaskan pemisahan fasa magnetic ordering yang terjadi di La2CuO4 nanopartikel. Kami menemukan bahwa inter-plane magnetic interaction, J’, berperan penting dalam mengontrol perubahan TN di antiferromagnet. Pada kasus La1.80Sr0.20CuO4, teramati adanya penurunan superconducting state secara drastis dan munculnya weak magnetism yang disebabkan oleh nano-sized effects. Hasil ini menunjukkan bahwa magnetic orders dan superkonduktivitas saling terkait dan berhubungan."
Depok: Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2020
D-pdf
UI - Disertasi Membership  Universitas Indonesia Library
cover
cover
"Kelapa merupakan komodotas penting bagi Indonesia.Selain memenuhi kebutuhan dalam negeri,kelapa juga merupakan komoditas ekspor penghasil devisa. Sebagian besar pertanaman kelapa rakyat belum memenuhi standar budi daya....."
BUTEPER
Artikel Jurnal  Universitas Indonesia Library
cover
"Biodiesel is an alternative fuel that can be produced from coconut oil through transesterification process using methanol and sodium hydroxide (NaOH) as catalyst. Nowadays , the development of biodiesel is urgently required to reduce people people burden due to the price and the uncertain supply of diesel fuel in small and remote island...."
Artikel Jurnal  Universitas Indonesia Library
cover
"Kelapa merupakan salah satu komoditas unggulan kabupaten Tanjung Jabung Timur, Jambi dari. 59.396 ha areal tanaman kelapa yang ada, sebagian terdapat di Kecamatan Muara Sabak. Pertanaman kelapa umumnya terdapat di lahan pasang surut di sepanjang aliran sungai (Dinas Perkebunan Kabupaten Tanjung jabung Timur 2002)...."
Artikel Jurnal  Universitas Indonesia Library
cover
"Dengan pertumbuhan penduduk yang tinggi ,sampai saat ini kecukupan kalori dan protein masyarakat Indonesia masih rendah . Untuk itu diperlukan penggalian sumber protein dan karbohidrat alternatif, seperti ubi kayu dan koro-koroan yang tumbuh dengan baik di lahan marginal...."
Artikel Jurnal  Universitas Indonesia Library
cover
"Mud of sawit represent processing of coconut of sawit phase of first able to be used as by materials of feeding in livestock having value of gizi high where chemical value of mud of sawit is BK 90,5% PK 11,5%,LK 19,1%,SK 17%,Ca 0,5% and P 0,75% and also gros energy 18 % or 3.353 kkal/kg of energy metabolism (Nitis, 1981)...."
Artikel Jurnal  Universitas Indonesia Library
cover
Muhammad Rafsanjani
"Tesis ini ingin menelaah mengapa transisi demokrasi di Indonesia berhasil sedangkan di Mesir gagal padahal kedua negara ini memiliki kesamaan fitur politik dan pengalaman sejarah. Dalam upaya menjawab pertanyaan ini, penulis menggunakan metode penelitian kualitatif, teori transisi demokrasi, Islam dan negara serta Islam dan demokrasi. Tesis ini menemukan bahwa terdapat peran yang berbeda yang dimainkan oleh aktor politk Islam di Indonesia dan Mesir. Di Indonesia aktor politik Islam memiliki inisiatif dan terlibat langsung dalam proses pembangunan tatanan politik demokratis. Selain itu aktor politik Islam juga memiliki konsensus bersama dengan aktor politik lain dalam penyelesaian konflik ketika terjadi perselisihan politis antar aktor. Di Mesir aktor politik Islam tidak memiliki inisiaf dan inisiatif pembangunan tatanan demokratis datang dari militer. Selain itu di Mesir juga tidak ada civilian consensus yang terbangun oleh sesama aktor politik pro-perubahan.

This thesis wants to examine why the democratic transition in Indonesia was successful while in Egypt it failed even though these two countries have a number of similarities in political features and historical experiences. In this effort, the author uses qualitative research methods, the theory of democratic transition, Islam and the state and Islam and democracy. This thesis finds that there are different roles played by Islamic political actors in Indonesia and Egypt. In Indonesia, Islamic political actors have the initiative and are directly involved in the process of building a democratic political order. In addition, Islamic political actors also have a consensus with other political actors in resolving conflicts when there is a political dispute between actors. In Egypt, Islamic political actors do not have the initiative and the initiative to build a democratic order comes from the military. In addition, in Egypt, there is no civilian consensus that has been built by fellow pro-change political actors."
Jakarta: Sekolah Kajian Stratejik dan Global Universitas Indonesia, 2021
T-pdf
UI - Tesis Membership  Universitas Indonesia Library
<<   1 2 3 4 5 6 7 8 9 10   >>