4,401 research outputs found
Report drawn up on behalf of the Committee on the Environment, Public Health and Consumer Protection on the First Report by the Commission of the European Communities on the State of the Environment. EP Working Documents, document 468/77, 10 January 1978
Report drawn up on behalf of the Committee on the Environment, Public Health and Consumer Protection on the proposal from the Commission of the European Communities to the Council (Doc. 536/76) for a decision adopting a research programme in the field of treatment and use of sewage sludge (concerted action). EP Working Documents 1977-78, Document 123/77, 6 June 1977
Sample Testing with Vitalab Flexor
The Vitalab Flexor is a high-tech medical instrument designed to perform a large number of simultaneous measurements on samples of blood and urine. For future purposes it is desired to increase the throughput, i.e. the number of tests per hour, of the instrument.
The analysis in this report gives upper bounds on the throughput if the Vitalab Flexor is operated in modes which are standard in the present situation. It is shown that a desired throughput of at least 266 tests per hour can not be realized on the basis of these standard operation modes. Possible improvements are suggested via so-called parallel or on-line operation modes, or a combination of these two modes. These possible improvements however require a number of changes in the technical design of the Vitalab Flexor
Hydrodynamics in a cocurrent gas-liquid trickle bed at elevated pressures
Data on design and operation of trickle beds at elevated pressures are scarce. In this study the influence of the gas density on the liquid holdup, the pressure drop, and the transition between trickle and pulse flow has been investigated in a tricklebed reactor operating up to 7.5 MPa and with nitrogen or helium as the gas phase. Gas-liquid interfacial areas have been determined up to 5.0 MPa by means of CO2 absorption from CO2/N2 gas mixtures into amine solutions. \ud
A comparison of the results from nitrogen as the gas phase to those of helium shows that at equal gas densities the hydrodynamic states are the same. The gas-liquid interfacial area increases when operating at higher gas densities. When the determined dimensionless interfacial areas agl/as are all within the range 0.25-0.8, the trickle-bed reactor is suggested to operate in the trickle-flow regime. The gas density has a strong influence on the liquid holdup. Due to the higher pressure gradients at elevated gas densities, the liquid holdup decreases noticeably. Besides, the boundary between the trickle-flow and pulse-flow regime shifts toward higher liquid throughputs: the region for trickle-flow operationg becomes larger. For the liquid holdup and the pressure gradient in the trickle-flow regime, correlations derived based on dimensionless numbers can be applied to high-prssure trickle beds
Report drawn up on behalf of the Committee on External Economic Relations on the proposal from the Commission of the European Communities to the Council (doc. 149/73) for a regulation concerning the importation into the Community of certain agricultural products originating in Turkey. EP Working Document, Document 1973-1974 159/73, 19 September 1973
Report drawn up on behalf of the Committee on External Economic Relations on the proposal from the Commission of the European Communities to the Council (Doc. 345/73) for a regulation concerning the system of trade with third countries in the market in products processed from fruit and vegetables. EP Working Document, Document 1973-1974 401/73, 11 March 1974
Report drawn up on behalf of the Committee on External Economic Relations on economic and trade relations between the European Community and Japan. EP Working Documents, document 570/76, 2 March 1977
Detection of Neutral Carbon in the M 31 Dark Cloud D478
Emission from the 492 GHz CI tranition was detected towards the dark cloud
D478 in M31. Using existing 12CO and 13CO measurements, models for the gas
properties of D478 are discussed. The observed CO and C line ratios can be
explained by two-component models (dense cores and tenuous envelopes);
single-density models appear less likely. The models indicate temperatures
T(kin) = 10 K. The beam-averaged C column density is 0.3 - 0.8 times that of
CO, whereas the total carbon to hydrogen ratio N(C)/N(H) = 5-3 times 10**-4.
The resulting CO-to-H2 conversion factor X is about half that of the Solar
Neighbourhood. With temperatures of about 10 K and projected mass densities of
5-10 M(sun)/pc**2 there appears to be no need to invoke the presence of very
cold and very massive clouds. Rather, D478 appears to be comparable to Milky
Way dark cloud complexes such as the Taurus-Auriga dark cloud complex.Comment: 7 Pages, 1 Figure; accepted by A&
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