Find Research Outputs

1993
2 Citations (Scopus)

Natural monopoly in Portuguese telecommunications

Seabra, M. D. C., 1 Apr 1993, In : Applied Economics. 25, 4, p. 489-494 6 p.

Research output: Contribution to journalArticle

Subadditivity
Telecommunications
Natural monopoly
Convexity
Empirical test
17 Citations (Scopus)

N-hydroxy-N-pivaloylanilines: A new aziridinating agent

Pereira, M. M., Santos, P. P. O., Reis, L. V., Lobo, A. M. & Prabhakar, S., 1 Dec 1993, In : Journal of the Chemical Society, Chemical Communications. 1, p. 38-40 3 p.

Research output: Contribution to journalArticle

Hydroxamic Acids
Alkenes
Electrons
15 Citations (Scopus)

NMR study of the long time, defect-controlled, magnetic reorientation of a nematic polymer liquid crystal

Gonçalves, L. N., Casquilho, J. P., Figueirinhas, J., Cruz, C. & Martins, A. F., 1 Jan 1993, In : Liquid Crystals. 14, 5, p. 1485-1493 9 p.

Research output: Contribution to journalArticle

Liquid crystal polymers
retraining
liquid crystals
Nuclear magnetic resonance
Defects
12 Citations (Scopus)

Noncooperative equilibrium and chamberlinian monopolistic competition

Pascoa, M. R., Aug 1993, In : Journal of Economic Theory. 60, 2, p. 335-353 19 p.

Research output: Contribution to journalArticle

Monopolistic competition
Demand curve
Equilibrium price
Profit
Pure strategy equilibrium
26 Citations (Scopus)

Nonmonotonic reasoning with logic programming

Pereira, L. M. & Alferes, J. J. A., Nov 1993, In : Journal Of Logic Programming. 17, 2-4, p. 227-263 36 p.

Research output: Contribution to journalArticle

Open Access
Nonmonotonic Reasoning
Logic Programming
Reasoning
Logic Programs
Reasoning about Actions

Númenor: Tolkien's literary Utopia

do Rosario Monteiro, M., 1 Jan 1993, In : History of European Ideas. 16, 4-6, p. 633-638 6 p.

Research output: Contribution to journalArticle

Open Access

Optative reasoning with scenario semantics

Pereira, L. M. & Alferes, J. J. A., 1 Jan 1993, MIT Press. p. 601-615 15 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access
File

O Sistema Português da Qualidade

Tenera, A., 1993, In : Revista Portuguesa de Gestão. III/IV, p. 53-63

Research output: Contribution to journalArticle

25 Citations (Scopus)

Preliminary characterisation and proposal of microbiological quality standard of sand beaches

Mendes, B., Nascimento, M. J. & Oliveira, J. S., 15 Jun 1993, In : Water Science and Technology. 27, 3-4, p. 453-456 4 p.

Research output: Contribution to journalConference article

Beaches
environmental quality
beach
Sand
sand
Urethane
Toluene
Crystalline materials
Polymers
Liquids
34 Citations (Scopus)

Quercetin and the mutagenicity of wines

Gaspar, J., Laires, A., Monteiro, M., Laureano, O. & Ramos, E., 1 Jan 1993, In : Mutagenesis. 8, 1, p. 51-55 5 p.

Research output: Contribution to journalArticle

Wine
Quercetin
Flavonoids
Mutagens
Rutin
3 Citations (Scopus)

Reduction of nitrosobenzene by 2-(α-hydroxyethyl)-3,4- dimethylthiazolium Salts

Ferreira, L. M., Chaves, H. T., Lobo, A. M., Prabhakar, S. & Rzepa, H. S., 1 Dec 1993, In : Journal of the Chemical Society, Chemical Communications. 2, p. 133-134 2 p.

Research output: Contribution to journalArticle

Salts
Hydroxylamine
Acylation
trifluoromethanesulfonic acid
nitrosobenzene
19 Citations (Scopus)

Resonance Raman Studies of Nickel Tetrathiolates and Nickel-Substituted Rubredoxins and Desulforedoxin

Huang, Y. H., Moura, I., Moura, J. J. G., LeGall, J., Park, J. B., Adams, M. W. W. & Johnson, M. K., 1 Jan 1993, In : Inorganic Chemistry. 32, 4, p. 406-412 7 p.

Research output: Contribution to journalArticle

Rubredoxins
cysteine
Nickel
nickel
anions
3 Citations (Scopus)

Resonance Raman study of sirohydrochlorin and siroheme in sulfite reductases from sulfate reducing bacteria

Underwood-Lemons, T., Moura, I. & To Yue, K., 11 Jun 1993, In : BBA - General Subjects. 1157, 2, p. 275-284 10 p.

Research output: Contribution to journalArticle

Oxidoreductases Acting on Sulfur Group Donors
Sulfates
Bacteria
Hydrogensulfite Reductase
Electrons
73 Citations (Scopus)

Robust model selection and M-estimation

Machado, J. A. F., 1 Jan 1993, In : Econometric Theory. 9, 3, p. 478-493 16 p.

Research output: Contribution to journalArticle

performance
Information criterion
Model selection
Robustness
Objective function
Open Access
microstructure
products
degradation
defects
hydrogen
3 Citations (Scopus)

Role of photodegradation on the μτ product and microstructure of the a-Si: H pin devices

Vieira, M., Fortunato, E., Lavareda, G., Carvalho, C. N. & Martins, R., 1 Dec 1993, Amorphous Silicon Technology. Schiff, E. A., Thompson, M. J., Madan, A., Tanaka, K. & LeComber, P. G. (eds.). Publ by Materials Research Society, Vol. 297. p. 637-642 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Photodegradation
Hydrogen
Degradation
Microstructure
Defects

Scenario semantics of extended logic programs

Alferes, J. J. A., Pereira, L. M. & Dung, P. M., 1 Jan 1993, MIT Press. p. 334-348

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Open Access
File
Logic Programs
Scenarios
Equivalence
Well-founded Semantics
Answer Sets
2 Citations (Scopus)

Selective O-acylation of aromatic hydroxylamines by 2-acylimidazolium and 2-acylbenzimidazolium salts

Santos, P. P. O., Trindade, C. L., Lobo, A. M. & Prabhakar, S., 4 Jun 1993, In : Tetrahedron Letters. 34, 23, p. 3793-3796 4 p.

Research output: Contribution to journalArticle

Hydroxylamines
Acylation
Salts
Derivatives
1,3-dimethylimidazolium
49 Citations (Scopus)

Spectroscopic characterization of cytochrome c peroxidase from Paracoccus denitrificans

Gilmour, R., Goodhew, C. F., Pettigrew, G. W., Prazeres, S., Moura, I. & Moura, J. J. G., 1 Jan 1993, In : Biochemical Journal. 294, 3, p. 745-752 8 p.

Research output: Contribution to journalArticle

Cytochrome-c Peroxidase
Paracoccus denitrificans
Heme
Paracoccus
Enzymes
63 Citations (Scopus)

Steroidal constituents from mature wheat straw

Gaspar, E. M. M. & Neves, H. J. C. D., 9 Sep 1993, In : Phytochemistry. 34, 2, p. 523-527 5 p.

Research output: Contribution to journalArticle

Stigmasterol
Ergosterol
glycols
Straw
wheat straw
78 Citations (Scopus)

Structure Analysis of Cytochrome c3 From Desulfovibrio vulgaris Hildenborough at 1·9 Å Resolution

Matias, P. M., Frazião, C., Morais, J., Coll, M. & Carrondo, M. A., 5 Dec 1993, In : Journal of Molecular Biology. 234, 3, p. 680-699 20 p.

Research output: Contribution to journalArticle

Desulfovibrio vulgaris
Heme
Histidine
R388
cytochrome c(3)
23 Citations (Scopus)
3 Downloads (Pure)
Open Access
File
Aldehyde Oxidoreductases
Desulfovibrio gigas
Pterins
Molybdenum
2-Propanol
10 Citations (Scopus)

Synthesis and characterization of novel liquidcrystalline polyurethanes

Cidade, M. T., Bordado, J. C. M., Figueirinhas, J. & Martins, A. F., 1 Jan 1993, In : Liquid Crystals. 13, 2, p. 295-300 6 p.

Research output: Contribution to journalArticle

diisocyanates
Polyurethanes
Phase diagrams
Optical microscopy
Differential scanning calorimetry
13 Citations (Scopus)

Tailoring defects on amorphous silicon pin devices

Martins, R., Fantoni, A. & Vieira, M., 2 Dec 1993, In : Journal of Non-Crystalline Solids. 164-166, PART 2, p. 671-674 4 p.

Research output: Contribution to journalArticle

Amorphous silicon
Defects
53 Citations (Scopus)
Ferredoxins
Electronic structure
Protons
Iron
Nuclear magnetic resonance
25 Citations (Scopus)
Ferredoxins
Protons
Ligands
Nuclear magnetic resonance
Coordination Complexes
29 Citations (Scopus)
Open Access
File
Desulfovibrio gigas
Hydrogenase
Ferredoxins
Oxidation-Reduction
Electrons
18 Citations (Scopus)

Which is the most appropriate dosage of liposomal amphotericin-B (AmBisome) for the treatment of fungal infections in infants of very low birth weight? [6]

Da Silva, L. P., Amaral, J. M. V., Ferreira, N. C., Lackner, H. & Urban, C., 1 Jan 1993, In : Pediatrics. 91, 6, p. 1217-1218 2 p.

Research output: Contribution to journalLetter

2 Citations (Scopus)

Wien-filtered Cs+ beam for SIMS: source description

Catarino, M. I. S., Teodoro, O. M. N. D. & Moutinho, A., 1993, In : Applied Surface Science. 70-1, Part 1, p. 291-294

Research output: Contribution to journalArticle

secondary ion mass spectrometry
cesium ions
surface ionization
filters
ion sources
20 Citations (Scopus)
1 Downloads (Pure)
Open Access
File
1992
12 Citations (Scopus)

(p, Vm, T) of (0.476Ar + 0.524N2)(I) and the calculation of thermodynamic properties of liquid air

Ricardo, A. A., Barreiros, S. F., Ponte, M. N. D., Albuquerque, G. M. N. & Calado, J. C. G., 1 Jan 1992, In : The Journal of Chemical Thermodynamics. 24, 12, p. 1281-1291 11 p.

Research output: Contribution to journalArticle

liquid air
Density (specific gravity)
Thermodynamic properties
thermodynamic properties
Oxygen
11 Citations (Scopus)
Biomimetics
Oxygen
Amines
tert-Butylhydroperoxide
2-amino-3-methylimidazo(4,5-f)quinoline

ADDING CLOSED WORLD ASSUMPTIONS TO WELL-FOUNDED SEMANTICS

Alferes, J. J. A., 1 Jan 1992, In : FIFTH GENERATION COMPUTER SYSTEMS 1992, VOLS 1 AND 2. 1, NA, p. 562-569

Research output: Contribution to journalArticle

Open Access
File
Novelty
Enlargement

A Fome e a Saudade: os prisioneiros portugueses na Grande Guerra

Severiano Teixeira, N., 1992, Colóquios Internacionais: Participação Portuguesa: Madrid 1990/ Zurique 1991/ Turim 1992. Lisboa: Comissão Portuguesa de História Militar, p. 9-36 28 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)

A IBOPAMINA NO TRATAMENTO DA INSUFICIENCIA CARDIACA CONGESTIVA. ESTUDO MULTICENTRICO PROLONGADO

Fonseca, C., Gouveia, R., Ceia, F., Mota, E., Macieira Coelho, E., Gil, V., Riva, E., Astorga, M. A., Seabra Gomes, R. & Sales Luis, A., 1 Jan 1992, In : Revista Portuguesa de Cardiologia. 11, 6, p. 515-523+501

Research output: Contribution to journalArticle

A multiphase system for the production of l-tryptophan from l-serine and indole - studies on product separation and recovery

RIBEIRO, MHL., Nunes, I. L., CABRAL, JMS. & FONSECA, MMR., 1992, Recent advances in biotechnology. Vol. 210. p. 509 1 p. (NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES E, APPLIED SCIENCES).

Research output: Chapter in Book/Report/Conference proceedingChapter

28 Citations (Scopus)

An application of quinic acid to the synthesis of linear homochiral molecules: A synthesis of (+)-negamycin

Maycock, C. D., Barros, M. T., Santos, A. G. & Godinho, L. S., 4 Aug 1992, In : Tetrahedron Letters. 33, 32, p. 4633-4636 4 p.

Research output: Contribution to journalArticle

Quinic Acid
Anti-Bacterial Agents
Molecules
negamycin
magnetostratigraphy
Miocene
timescale
demagnetization
magnetization
49 Citations (Scopus)

Biofilm reactors: An experimental and modeling study of wastewater denitrification in fluidized‐bed reactors of activated carbon particles

Coelhoso, I., Boaventura, R. & Rodrigues, A., Aug 1992, In : Biotechnology and Bioengineering. 40, 5, p. 625-633 9 p.

Research output: Contribution to journalArticle

Denitrification
Experimental reactors
Biofilms
Waste Water
Activated carbon

BIOMIMETIC ACTIVATION OF PREMUTAGENS WITH FETPP AND VARIOUS OXYGEN DONORS

Rodrigues, AS., Rueff, J., Laires, A. & Gaspar, J., Apr 1992, In : Mutation research. 271, 2, p. 158-158 1 p.

Research output: Contribution to journalMeeting Abstract

1 Citation (Scopus)

Charge effects on the photochemistry of the Co(EDTA)-·I- system in the presence of polyammonium macrocyclic receptors

Pina, F., Parola, A. J., Bencini, A., Micheloni, M., Manfrin, M. F. & Moggi, L., 15 May 1992, In : Inorganica Chimica Acta. 195, 2, p. 139-143 5 p.

Research output: Contribution to journalArticle

ethylenediaminetetraacetic acids
Photochemical reactions
Ethylenediaminetetraacetic acid
Edetic Acid
photochemical reactions

CIM Information Management System - An Express-based integration platform

Camarinha-Matos, L. M. & Osorio, A. L., 23 Nov 1992, Proceedings of the IFAC Workshop on CIM in Process and Manufacturing Industries . Chapman & Hall, p. 103-108

Research output: Chapter in Book/Report/Conference proceedingChapter

Information management
Information systems

Cloning of the thymidylate synthetase gene (thyPIG 3) from the Bacillus subtilis temperate phage IG 3

Santos, I. & de Lencastre, H., 1 Mar 1992, In : Archives of Virology. 127, 1-4, p. 65-74 10 p.

Research output: Contribution to journalArticle

Thymidylate Synthase
Bacillus subtilis
Bacteriophages
Organism Cloning
Genes
18 Citations (Scopus)
Open Access
10 Citations (Scopus)

Default theory for well founded semantics with explicit negation

Pereira, L. M. S. M. & Alferes, J. J. A., 1 Jan 1992, In : LOGICS IN AI. 633, NA, p. 339-356 18 p.

Research output: Contribution to journalArticle

Open Access
Well-founded Semantics
Logic Programs
Fertilization
Fixpoint
Bottom-up
45 Citations (Scopus)

Direct spectroscopic evidence for the presence of a 6Fe cluster in an iron-sulfur protein isolated from Desulfovibrio desulfuricans (ATCC 27774)

Moura, I., Tavares, P., Moura, J. J. G., Ravi, N., Boi Hanh Huynh, H. H., Liu, M. Y. & LeGall, J., 1 Jan 1992, In : Journal of Biological Chemistry. 267, 7, p. 4489-4496 8 p.

Research output: Contribution to journalArticle

Desulfovibrio desulfuricans
Iron-Sulfur Proteins
Iron
Sulfur
Paramagnetic resonance
256 Citations (Scopus)
Hydrogen Sulfide
Hydrogen sulfide
Sulfates
Bacteria
Growth