Abstract: The present invention relates to a process for effectively preparing L-ribose, which is recognized as being highly important in relation to the development of new antiviral medicines, from 1,4-lactone compound.

Abstract: The present invention relates to a new process for effectively converting the chirality of 4- or 5-position carbon of a 1,4-lactone- or 1,5-lactone sugar compound which comprises reacting the lactone compound with secondary amine and sulfonyl group-containing compound. The compound of which chirality is converted according to the present invention can be advantageously used for preparing such expensive rare sugar compounds as L-ribose, D-talose, etc.

Abstract: A pressure and temperature sensor assembly for internal combustion engines is disclosed. The sensor assembly is formed by integrating a temperature sensor part with a conventional MAP sensor into a single structure. In the temperature sensor part, a temperature sensing rod (23) is formed by partially extending downward the bottom case (7) of a MAP sensor at a portion around the lower end of a pressure inlet port (9) of the bottom case (7). A temperature sensor chip (24) is interiorly installed in the temperature sensing rod (23) and is electrically connected to the connection terminals of the top case (1). The sensor assembly is commonly used for sensing both the internal pressure and inlet air temperature of a cylinder.

Abstract: A manifold absolute pressure (MAP) sensor for internal combustion engines is disclosed. In the MAP sensor, the top and bottom cases (1, 7) of a sensor housing have a plurality of fitting slots (10) and fitting protrusions (11) at their connection edges respectively and are easily and tightly assembled into a single structure through a mechanical fitting and epoxy bonding process. A plurality of support protrusions (12, 12') are internally formed on each of the top and bottom cases (1, 7) and support each side of the circuit board (5), with the circuit board (5) being positioned under the sensor member (4) and allowing the pressure inlet pipe (4') of the sensor member (4) to pass through. A supporting ring (13) and an O-ring (14) are commonly fitted over the pressure inlet pipe (4') of the sensor member (4) and are closely fitted into the enlarged top end of the pressure inlet port (8).