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Uji Kinerja Alat Penyulingan Minyak Nilam

   Minyak atsiri merupakan salah satu komoditas pertanian yang potensial untuk dikembangkan di Indonesia. Salah satu minyak atsiri Indonesia yang paling penting adalah minyak nilam. Nilai ekspor minyak nilam selalu meningkat, tahun 2001 mencapai US $ 52,97 juta atau 4,4 % nilai ekspor minyak atsiri Indonesia. Indonesia pemasok utama minyak nilam dunia (90 %). Sementara kebutuhan minyak nilam dunia berkisar 1.500 ton/tahun dengan pertumbuhan 5 %.
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THE SCIENTIFIC METHOD

What is science? How is it different from other ways of thinking? and what are scientists like? How do they think and what do they mean when they talk about doing science? Science isn't just test tubes or strange apparatus. And it's not just frog dissections or names of plant species. Sciences is way of thinking, a vital, ever-growing way of looking at the world. It is a way of discovering how the world works a very particular way that uses a set of rules devised by scientists to help them also discover their own mistakes. Everyone knows how easy it is to make a mistake about the things you see or hear or perceive in any way. If you don't believe it, look at the two horizontal lines on the previous page. One looks like a two way arrow; the other has the arrow heads inverted. Which one do you think is longer (not including the arrow heads)? Now measure them both. Right: They are exactly the same length. Because it's so easy to go wrong in making observations and dra...
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Jurnal: PERPINDAHAN PANAS DAN MASSA PADA PENGEMBUNAN CAMPURAN METANOL-PROPANOL UDARA DALAM KONDENSOR TEGAK

Pengembunan campuran uap yang mengandung gas sering dijumpai di industri. Penelitian mengenai pengaruh gas pada proses pengembunan telah banyak dilakukan. Pengaruh tersebut diantaranya adalah penurunan koefsien perpindahan panas rerata pada pengembunan campuran uap air dan udara (Lee et al., 2001) dan meningkatkan hambatan permukaan dan menurunkan estimasi nilai koefisien pengembunan (Takaharu and Yurika, 2003), mempengaruhi kurva karakteristik perpindahan kalor kondensasi terutama pada daerah hambatan difusi pada pengembunan campuran uap-air, etanol dan udara (Wang and Utaka, 2004; Wang and Utaka, 2005). Pada pembangkit listrik tenaga panas bumi, keberadaan gas mempengaruhi kinerja termodinamiknya (Gokcen and Yildirim, 2008).
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