Judul: Perbaikan Mutu Biodiesel Hasil Proses Fraksinasi dengan Kandungan Metil Oleat (C18:1) Dominan untuk Penerapannya sebagai Bahan Bakar
Abstrak: Fractionation of palm olein biodiesel using fractional distillation system is used to separate dominant methyl palmitic (C16) with dominant methyl oleic (C18:1). This biodiesel fraction contains dominant of methyl oleic (C18:1), has a good characteristic in lower cloud point that possibly be applicated as a fuel in four season country. Bentonite are used in this research with the view of its usefulness in lowering viscosity and acid number. The purpose of this study is to obtain the best characteristics of biodiesel as a fuel appropriate to the biodiesel standard, and to obtain the best bentonite concentration used to improve the unappropriate parameter. This study was conducted using completely randomized design. Biodiesel quality improvement is done by using experimental factor of bentonite concentration (1%, 3%, and 5%). The use of bentonite experimentally could lowering acid number and kinematic viscosity. Compared to the blank (control), biodiesel with 1% of bentonite concentration could give the best result in lowering kinematic viscosity.
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Judul: Penggunaan Bahan Adsorben dan Pengkelat Pada Proses Pemurnian Minyak Kayu Putih (Melaleuca leucadendron Linn.) Kabupaten Buru
Abstrak: Purification is one of method to improve the quality of cajuput oil. This study aims to identify and analyze the effect of citric acid and bentonite using to the yield, limpidity, metal content, and Buru cajuput oil quality based on SNI 06-3954-2006 (scent, color, specific gravity, index of refraction, optical rotation, and solubility in 70% ethanol). Variable process conditions studied were type of material purification (citric acid and bentonite) and their concentration were 0%, 1%, 2%, and 3%. The citric acid and bentonite using had an affect on yield, specific gravity, optical rotation and hadn’t an in with a limpidity and index of refraction based on statistical tests were performed using the SAS (Statistical Analysis System). Despitefully, citric acid using produced oil have been resulted on tranparent until greenish yellow colored, whereas the use of bentonite have produced oil that it is yellowed. The scent of cajuput oil hasn’t changed after the purification process. The best treatment was selected based on the value of limpidity, it was a purification treatment using 1% citric acid. Three types metals content (Cu, Fe, and Mg) decreased after purification using 1% citric acid. Other that, the content of cineol increased after purified from 40.73% to 43.82%. The results of refining oil by using citric acid and bentonite have meet in accordance with the ISO (2006).
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Judul: Granular venereal disease ( GVD ) lepuh kecil pada vagina sapi teori terbentuknya dan cara pengobatannya
Abstrak: Isseponi pada tahun 1887 (dalam Williams, W.L. 1950) pertama sekali menemukan penyakit ini dengan mengamati ada nya lepuh-lepuh atau nodul dan peradangan pada mukosa vulva dan menduga merupakan penyebab terjadinya ketidak suburan dan abortus pada sapi. Sedang beberapa ahli menyatakan bahwa GVD bukan merupakan penyebab terjadinya ketidak suburan dan abortus, hanya kemungkinan adanya infeksi sekunder yang menyebabkan terjadinya sterilitas dan abortus. Sampai sekarang agen penyebab penyakit ini masih belum diketahui dengan pasti, ada yang menyatakan disebabkan oleh virus, bakteri, protozoa ataupun micoplasma. - Masa inkubasi penyakit 2 sampai 3 minggu dan dapat berjalan kronis dan ringan tanpa menimbulkan gangguan dan dapat juga berlangsung akut dan parah. Sering penyakit ini dapat sembuh sendiri tanpa diketahui pemunculannya lebih dahulu sehingga pemilik ternak tidak mengetahui hewannya pernah terserang penyakit Venereal Granular ini. Penularan paling sering terjadi melalui perkawinan alam dimana sapi-sapi jantan dapat berperan sebagai penye bar penyakit ke sapi-sapi betina lain. ...
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