¹H NMR SPECTRA AND STEREOCHEMISTRY OF CIS- AND TRANS-5,6-DIMETHYL-2-OXO-1,4-DIOXANS.AYRAS P.1975; ORG. MAGNET. RESON.; G.B.; DA. 1975; VOL. 7; NO 4; PP. 177-178; BIBL. 15 REF.Article

THE ¹³C,H COUPLING CONSTANTS IN STRUCTURAL AND CONFORMATIONAL ANALYSIS. II. THE CORRELATION OF ³J(HC=CH) AND ³J(CH₃C=CH) IN ETHYLENES AND THEIR METHYL DERIVATIVES.AYRAS P.1977; ORG. MAGNET. RESON.; G.B.; DA. 1977; VOL. 9; NO 11; PP. 663-664; BIBL. 14 REF.Article

ON THE STEREOCHEMISTRY OF 1,4-DIHETEROCYCLANES. III. THE ¹H NMR SPECTRUM AND RING CONFORMATION OF 5-OXO-1,4-DIOXEPANE.AYRAS P.1978; FINN. CHEM. LETTERS; FINL.; DA. 1978; NO 2-3; PP. 100-102; BIBL. 8 REF.Article

THE ¹³C,H COUPLING CONSTANTS IN STRUCTURAL AND CONFORMATIONAL ANALYSIS. I. THE CORRELATION OF ²J(CH₃CH) AND ²J(HCH) IN CERTAIN SYSTEMS.AYRAS P.1977; ACTA CHEM. SCAND., B; DANEM.; DA. 1977; VOL. 31; NO 4; PP. 325-328; BIBL. 24 REF.Article

DETERMINATION OF THE CONFORMATION OF 1,4-DIHETEROCYCLANES. I. THE ¹H N.M.R. SPECTRUM AND RING CONFORMATION OF 3-METHYL-2-OXO-1,4-DIOXEPANE.AYRAS P; PARTANEN A.1977; ORG. MAGNET. RESON.; G.B.; DA. 1977; VOL. 9; NO 6; PP. 379-381; BIBL. 25 REF.Article

DETERMINATION OF THE CONFORMATION OF SUBSTITUTED 4,6-DIOXO-1,3-DIOXANS. I. ¹H NMR SPECTRA OF 2-2,5- AND 2,2,5-SUBSTITUTED DERIVATIVES.AYRAS P; PARTANEN A.1976; FINN. CHEM. LETTERS; FINL.; DA. 1976; NO 4-5; PP. 110-114; BIBL. 15 REF.Article

DETERMINATION OF THE CONFORMATION OF 1,4-DIHETEROCYCLANES. II. THE ¹H AND ¹³C NMR SPECTRA AND RING CONFORMATION OF SOME 2-OXO-1,4-DIOXEPANE DERIVATIVES.PARTANEN A; AYRAS P.1977; FINN. CHEM. LETTERS; FINL.; DA. 1977; NO 7; PP. 208-212; BIBL. 12 REF.Article

DETERMINATION OF THE CONFORMATION OF SUBSTITUTED 4,6-DIOXO-1,3-DIOXANS. II. ¹H NMR SPECTRA OF SOME 2-PHENYL-SUBSTITUTED 4,6-DIOXO-1,3-DIOXANS. THE CONFORMATIONAL PREFERENCE OF THE PHENYL GROUP.AYRAS P; LOTJONEN S.1976; FINN. CHEM. LETTERS; FINL.; DA. 1976; NO 4-5; PP. 115-118; BIBL. 11 REF.Article

CONFORMATIONAL ANALYSIS. V. 2,6-DIALKYL- AND 2,2,6-TRIALKYL-4-OXO-1,3-DIOXANSAYRAS P; PIHLAJA K.1973; TETRAHEDRON; G.B.; DA. 1973; VOL. 29; NO 10; PP. 1311-1316; BIBL. 21 REF.Serial Issue

THE ¹³C, H COUPLING CONSTANTS IN STRUCTURAL AND CONFORMATIONAL ANALYSIS. III. LONG-RANGE CARBON-HYDROXYL PROTON COUPLINGS AS EVIDENCE OF HYDROGEN BONDING IN SOME ACYLPHLOROGLUCINOLAYRAS P; WIDEN CJ.1978; ORG. MAGNET. RESON.; GBR; DA. 1978; VOL. 11; NO 11; PP. 551-554; BIBL. 14 REF.Article

¹³C NMR SPECTRAL PROPERTIES OF SOME CHLORINATED BIPHENYLOLSLOTJONEN S; AYRAS P.1978; FINN. CHEM. LETTERS; FIN; DA. 1978; NO 8; PP. 260-263; BIBL. 16 REF.Article

THE ¹³C, H COUPLING CONSTANTS IN STRUCTURAL AND CONFORMATIONAL ANALYSIS. IV: THE ROTATIONAL DEPENDENCE OF THE LONG-RANGE CH COUPLINGS OF THE ALDEHYDE AND HYDROXYL PROTONS IN SALICYLALDEHYDEAYRAS P; LAATIKAINEN R; LOTJONEN S et al.1980; ORG. MAGNET. RESON.; GBR; DA. 1980; VOL. 13; NO 5; PP. 387-390; BIBL. 22 REF.Article

NMR SPECTROSCOPY OF NATURALLY OCCURRING PHLOROGLUCINOL DERIVATIVES. III: CARBON-13 SPECTRAL ANALYSIS AND TAUTOMERIC STRUCTURES OF EIGHT FILICINIC ACIDS, 2-BUTYRYL-4-HYDROXY-4,6-DIMETHYL-1,3,5-CYCLOHEXANTRIONE AND 6-METHYL-2,3-DIHYDROPYRANE-2,4-DIONEAYRAS P; LOETJOENEN S; WIDEN CJ et al.1981; PLANTA MED.; ISSN 0032-0943; DEU; DA. 1981; VOL. 42; NO 2; PP. 187-194; BIBL. 21 REF.Article

CARBON-13 SPECTRAL ANALYSIS, TAUTOMERIC STRUCTURES AND CONFORMATIONS OF FOUR TWO-RING METHYLENE-BRIDGED PHLOROGLUCINOL DERIVATIVESAYRAS P; LOTJONEN S; WIDEN CJ et al.1981; ORG. MAGN. RESON.; ISSN 0030-4921; GBR; DA. 1981; VOL. 16; NO 3; PP. 209-213; BIBL. 13 REF.Article

GLASS CAPILLARY GAS CHROMATOGRAPHIC DETECTION AND MASS SPECTRAL ANALYSIS OF SOME HYDROXYL DERIVATIVES OF POLYCHLORINATED BIPHENYLS (PCB'S)LOTJONEN S; AYRAS P; PYYSALO H et al.1979; FINN. CHEM. LETTERS; FIN; DA. 1979; NO 2; PP. 57-60; BIBL. 16 REF.Article

A proof for negative vicinal proton―proton and proton―carbon spin―spin couplinds in aliphatic aldehydes by using temperature and solvent dependence. Conformational studies on glycoaldehyde and di-tert-butyl ethanalLAATIKAINEN, R; KRAL, V; AYRAS, P et al.Journal of magnetic resonance. 1987, Vol 74, Num 1, pp 12-18, issn 0022-2364Article

The phloroglucinols of Dryopteris stenolepis (Pteridophyta, Dryopteridaceae)WIDEN, C.-J; ÄYRÄS, P; REICHSTEIN, T et al.Annales botanici Fennici. 1992, Vol 29, Num 1, pp 41-54, issn 0003-3847Article

New phloroglucinol derivatives in Dryopteris pulvinulifera and D. subtriangularis (Pteridophyta, Dryopteridaceae)WIDEN, C.-J; ÄYRÄS, P; NEUVONEN, K et al.Annales botanici Fennici. 1993, Vol 30, Num 4, pp 285-297, issn 0003-3847Article

Urocanic acid isomers in epidermal samples and suction blister fluid of nonirradiated and UVB-irradiated human skinPASANEN, P; REUNALA, T; JANSEN, C. T et al.Photodermatology photoimmunology & photomedicine. 1990, Vol 7, Num 1, pp 40-42, issn 0905-4383Article

CMOS switched capacitor liquid crystal driverHODA, T; AYRAS, P; LARUSSA, L et al.Electronics Letters. 2006, Vol 42, Num 1, pp 1-2, issn 0013-5194, 2 p.Article

Multilevel structures in sol-gel thin films with a single UV-exposure using a gray-scale maskÄYRÄS, P; RANTALA, J. T; LEVY, R et al.Thin solid films. 1999, Vol 352, Num 1-2, pp 9-12, issn 0040-6090Article

Effects of cis- and trans-urocanic acids on the secretion of interleukin-1β and tumour necrosis factor-α by human peripheral blood monocytesLAIHIA, J. K; JANSEN, C. T; UKSILA, J et al.Acta dermato-venereologica. 1994, Vol 74, Num 4, pp 266-268, issn 0001-5555Article

Effect of psoriasis heliotherapy on epidermal urocanic acid isomer concentrationsSNELLMAN, E; KOULU, L; PASANEN, P et al.Acta dermato-venereologica. 1992, Vol 72, Num 3, pp 231-233, issn 0001-5555Article

Fabrication of hybrid sol-gel glass diffractive elementsRANTALA, J. T; ÄYRÄS, P; LEVY, R et al.SPIE proceedings series. 1999, pp 212-218, isbn 0-8194-3090-0Conference Paper

Strip-loaded structure for ion-exchanged Er³⁺-doped glass waveguide amplifiersNUNZI CONTI, G; ÄYRÄS, P; CAVALIERE, C et al.SPIE proceedings series. 1999, pp 122-128, isbn 0-8194-3092-7Conference Paper