Judul: Sintesis dan Pencirian Nanosilika Berbahan Dasar Abu Ketel Industri Gula dengan Variasi Waktu Aging dan pH Presipitasi.
Abstrak: Boiler ash from sugar cane industry contains silica that was synthesized to nanosilica using precipitation method. Precipitation pH and aging time are parameters that have influenced to nanosilica characterization. The purpose of this research was to synthesis nanosilica from boiler ash using precipitation method, determine the effect of precipitation pH and aging time variation on the characterization of nanosilica, determine the potential application based on characterization of nanosilica. The research was consist of three stages, preparation of boiler ash, extraction silica from furnace ash, and synthesis nanosilica. Boiler ash from sugar cane industry contained 49.69% silica and furnace ash contained 78.75% silica. Nanosilica was material or compound that have multifase characterization. Increase precipitation pH would increase amount of crystal phase, diffraction peak, and intensity of diffraction peak. Increase aging time would increase intensity of diffraction peak and amount of crystal phase. Degree of crystallinity has ranges 66.397–93.530%, average of crystal size has ranges 37.772–56.867 nm, average of particle size has ranges 214.04–698.24 nm, and PDI value has ranges 0.207–0.833. Increase precipitation pH and aging time would increase amount of siloksane groups and decrease amount of silanol groups. Nanosilica has potential application as a composit of electrolyte membrane DMFC (Direct Methanol Fuel Cell), composit of addition support layer membrane ultrafiltration, filler in ship rubber air bag, filler of composit resin, and SCM (Supplementary Cementitious Material) for concrete.
Keyword: aging time, boiler ash, nanosilica, precipitation, precipitation pH

Judul: Penambahan Template Kitosan dan Albumin pada Sintesis Nanosilika Abu Ketel Industri Gula dengan Metode Kopresipitasi.
Abstrak: Nanosilica has many potential application in widely sectors. Boiler ash has contains silica that synthesized using precipitation method. Templating was modification process from precipitation method. The objective of this research was to synthesis nanosilica with template from boiler ash using precipitation method, determine the effect of chitosan and albumin templates on the characterization of nanosilica, determine the potential application based on characterization of nanosilica. This research consist of several stages, preparation of boiler ash, silica extraction, synthesis of nanosilica, testing of material, testing and characterization of nanosilica, and analyze of data. Boiler ash contained 49.69% silica and furnace ash contained 78.75% silica. Increasing concentration of chitosan and albumin templates was decrease amount of diffraction peak, diffraction peak intensity, decrease average of crystal size, narrow of crystal size distribution, and narrow of particle size distribution (PDI) curve. Degree of crystallinity nanosilica with chitosan template has ranges 34.40-54.69% and with albumin template has ranges 39.33-68.79%. Crystal size nanosilica has ranges 35.87-61.57 nm. Particle size nanosilica has ranges 228.39-1369.23 nm. PDI value nanosilica has ranges 0.09-0.297. Nanosilica has potential application as compose top layer of ultrafiltration membrane, compose porous support of ultrafiltration membrane, and support component of catalyst.
Keyword: albumin, boiler ash, chitosan, nanosilica, precipitation

Judul: Pengaruh Infeksi Haemoproteus columbae (Kruse, 1890) Pada Burung Merpati Dan Cara Penanggulangannya
Abstrak: Haemoproteus columbae merupakan paras it yang menyerang sel-sel darah merah burung rnerpati. Siklus hidupnya kompleks dan dapat dibagi menjadi dua yaitu siklus hidup asexual terjadi delam tubuh burung merpati dan siklus hidup sexual terjadi dalam tubuh lalat dari famili Hippoboscidae sebagai vektor. Stadium yang nampak dalam peredaran darah perifer hanyalah garoetosit yang dapat dibedakan menjadi dua yaitu gametosit jantan (mikrogametosit) dan gametosit betina (makrogametosit).
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