Mechanically pumped single-phase fluid loops are well suited for transporting and rejecting large amounts of waste heat from spacecraft electronics and power supplies. While past implementations of such loops on spacecraft have used moderate operating temperatures (less than 60oC), higher operating temperatures would allow equivalent heat loads to be rejected by smaller and less massive radiato...

An energy efficient temperature sensor for constant temperature monitoring has been introduced in this paper. The proposed sensor doesn’t use BJT for sensing; instead it utilizes the temperature dependency of threshold voltage of MOSFETs for designing of this sensor. The sensor circuit is designed with separate biasing circuit for limiting the power dissipation of the circuit. Both PTAT and CTA...

Proses interesterifikasi yang telah dilakukan menggunakan katalis homogen maupun heterogen perlu proses pemisahan di akhir reaksi. Minyak atsiri merupakan alternatif pilihan lebih efisien sebab tidak reaksi karena berfungsi sebagai antioksidan untuk biodiesel dan ramah lingkungan. Tujuan penelitian adalah mendapatkan pembuatan efektif yaitu dengan tahapan sedikit sehingga akan mengurangi biaya ...

The biochemical properties of invertase entrapped in alginate gel were studied. The kinetic parameters were determined for immobilized and free invertase. The value of Michaelis constant Km of the immobilized invertase (139.19 mM) was greater than that of the free invertase (93.19 mM), whereas, Vmax was smaller for the immobilized enzyme. Immobilization impressively improved the thermal and sto...

AritraChatterjee The cholesterol oxidase enzyme breaks down cholesterol into an intermediate cholest-5-en-3-one, which is then converted to cholest-4-en-3one (Smith and Brooks 1997) . In the present study this mechanism was exploited. The current produced by the release of electrons from the above reaction was used to determine the amount of free cholesterol in the serum sample. The functioning...