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: Adsorpsi–fotodegradasi Biru Metilena oleh Nanokomposit Kaolin/TiO2 yang Diemban dengan ZnO
Abstrak: Synthetic dye waste such as methylene blue pollutes aquatic evironment. Kaolin/TiO2 nanocomposite was made for adsorption–photodegradation process under UV light. The nanocomposite was prepared by paste and ball milling methods. Semiconductor ZnO was used as dopant to ease photodegradation in visible-light range. X-ray diffraction results showed that kaolin/TiO2 and kaolin/TiO2/ZnO nanocomposites were successfully made. However, ZnO doping decreased crystallinity of the nanocomposites. Scanning electron microscopy results showed that the surface morphology of the nanocomposite made by using paste method and that of doped nanocomposite made by using ball milling method were different. ZnO doping increased the adsorption capacity of the nanocomposite. Photodegradation results showed that ZnO doping improved the photocatalytic activity of the nanocomposites under UV and visible irradiation. However, the photocatalytic activity of the nanocomposites was relatively better under UV irradiation than that under the visible irradiation.
Keyword: photodegradation, kaolin/TiO2/ZnO nanocomposites, kaolin, adsorption capacity

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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