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: 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: Penelitian pendahuluan tentang vaskularis dan intervasi kepala dan leher kambing
Abstrak: Penulisan skripsi ini bertujuan untuk mengetahui tata cara persiapan preparat praktikum, menambah bahan pustaka dan membuat gambaran makro anatomi kepala dan leher kambing (Capra sp.) dengan vaskularisasi dan inervasinya. Kambing berasal dari genus capra, yang berbeda dengan domba dan sapi tetapi secara umum struktur anatominya mudah dibedakan. Terkadang antara kambing dan domba dari varietas tertentu sulit dibedakan. Sampai dewasa ini kebanyakan buku-buku teks anatomi hewan piara yang tersedia, masih menitik beratkan anatomi. kuda sebagai bahan pokok dan anatomi golongan ruminansia, dalam garis besarnya hanya melukiskan anatomi sapi dan dom ba. Jarang atau hampir tidak mempersoalkan anatomi kambing. Adapun buku teks yang sekarang dipakai sebagai pegangan untuk mempelajari anatomi kambing adalah "Anatomy of the Sheep "karangan May (1970), karena dombalah yang di anggap paling menyerupai kambing. Arteri-arteri yang ditemukan untuk vaskularisasi daerah leher dan kepala adalah: Truncus brachiocephalicus, Truncus bicaroticus, A. carotis communis sinistra dan dex tra, A. occipitalis, A. carotis externa, A. lingualis, A. maxillaris, A. temporalis superficialis, A. auricularis caudalis, A. transversa faciei, A. labialis maxillaris dan A. labialis mandibularis.
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