Judul: Sintesis Nanokomposit Kaolin/TiO2 Teremban Fe2O3 untuk Adsorpsi-Fotodegradasi Biru Metilena
Abstrak: Kaolin is a type of clay mineral that has adsorption capacity. The experiment shows that the adsorption capacity of kaolin was 20.6 mg/g. This value is lower than zeolite adsorption capacity that in general has value above 100 mg/g. Mixing kaolin with other materials to form nanocomposite, may improve its adsorption properties. Nanocomposites that had been synthesized were kaolin/TiO2 nanocomposites with the addition of Fe2O3 using 2 synthetic methods, namely using ball milling and paste methods. The nanocomposite synthesized using ball milling method had higher adsorption capacity value, i.e. 23.6 mg/g. The nanocomposite of kaolin/ TiO2 was able to adsorb and degrade waste dyes in ultraviolet range. Furthermore, addition of Fe2O3 to the kaolin/TiO2 nanocomposite improved the performance of the nanocomposite by reacting under the visible rays. Therefore, the performance of nanocomposite of kaolin/TiO2 added with Fe2O3 was is more effective since visible ray is the major part of the sun light.
Keyword: nanocomposite of kaolin/TiO2/Fe2O3., kaolin, photodegradation, adsorption

Judul: Nanokomposit kaolin-TiO2 dengan dopan urea untuk adsorpsi dan fotodegradasi zat warna biru metilena
Abstrak: Methylene blue is one type of dyes found as pollutant in Indonesia water system. Kaolin-TiO2 nanocomposite was synthesized and used to overcome this problem by utilizing its adsorption-photodegradation mechanism. Kaolin-TiO2 nanocomposite was made by mixing kaolin powder and TiO2 powder physically using ball milling and paste methods. The ball milling method is found to be simpler than paste method, and also resulting in smaller particle size. Smaller particle size also found to increase both adsorption and photodegradation activities. It is believed that ball milling method also generated a homogenous mixture. From 2 different sample compositions and 3 milling times used, it was found that synthesis kaolin-TiO2 nanocomposite requiring calciumbased binder with an optimum milling time of 5 hours. Kaolin-TiO2 nanocomposite was doped with urea by manual physical mixing followed by calsination at 300 °C for 2 hours. Urea doped-nanocomposite has larger activity than undoped nanocomposite in visible light zone. It means that the photocatalytic activity of urea doped-nanocomposite was successfully shifted to the red zone area of the visible light. Therefore, incident sunlight can be used as energy source in the adsorption-photodegradation process using nanocomposite Kaolin-TiO2.
Keyword: adsorption, ball milling, kaolin, methylene blue, photodegradation

Judul: Pseudorabies pada babi dan kemungkinan penanggulangannya
Abstrak: Pseudorabies adalah penyakit hewan menular terutama menyerang babi, juga dapat menyerang hewan berdarah panas seperti anjing dan kucing yang sifatnya akut. Penyebab pseudorabies ini adalah virus herpes. Pseudorabies disebut juga dengan penyakit Aujeszky, mad-itch dan infeksi paralysis bulbar. Penamaan penyakit ini didasarkan pada gejala klinis yang didapati oleh para ahli atau para peternak sapi. Penyakit Aujeszky dilaporkan di Hongaria (1902), infeksi paralysis bulbar oleh Marek (1904) dan maditch oleh para peternak sapi di Amerika Utara. Pseudorabies pertama kali dilaporkan oleh Aujeszky (1902) dan penyakit ini tersebar luas di negara negara Eropa, Amerika Latin, Amerika Utara, Cina, India dan kawasan Asia Tenggara seperti Malasya, Laos, Thailand, Philippina dan Singapura. Virus dengan rantai ganda DNA mempunyai sifat-sifat kestabilan terhadap pengaruh biokimia dan biofisika tertentu yang bisa membuat virus aktif dan inaktif. Hewan yang rentan terhadap penyakit ini adalah babi (anak babi), sapi, domba, anjing, kucing dan tikus. Tingkat kerentanan hewan tergantung dari spesies, tingkatan umur, jenis kelamin, faktor genetik individu dan lingkugan. ...
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