Artículos de revistas: Recent submissions
Now showing items 801-820 of 4968
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(1988)The aerial parts of Gypothamnium pinifolium afforded, in addition to three known 5-methyl coumarins, four new 5-methyl coumarins and two closely related coumaranones. Furthermore, seven diterpenes, all derived from ...
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(2004)We study all-optical switching based on the dynamic properties of discrete vector solitons in waveguide arrays. We employ the concept of polarization mode instability and demonstrate simultaneous switching and amplification ...
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(2005)C15H22O2, monoclinic, C121 (no. 5), a = 18.623(4) Å, b = 9.702(2) Å,c = 7.770(2) Å, β = 98.19(3)°, V= 1389.6 Å3, Z = 4, Rgt(F) = 0.058, wRref(F2) = 0.133, T= 293 K. © 2014, Oldenbourg Wissenschaftsverlag München. All rights ...
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(2003)C17H13NO3, orthorhombic, P21nb (No. 33), a = 8.7927(8) Å, b = 30.165(2) Å,c = 4.9136(6) Å, K= 1303.2 Å3,Z= 4, Rgt(F) = 0.053, wRref(F2) = 0.161, T = 293 K. © 2014, Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, ...
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(2000)The products 3-hydroxy-1,4-benzoxazin-2-one (5) and 5-nitro-2-aminophenol were isolated from the decomposition reaction of the title compounds in aqueous solutions. Two mechanisms are proposed for the formation of these products.
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(1993)The influence of three physiological factors related to triploid production was examined for rainbow trout. Individual spawnings of 46 females were used to perform triploid production experiments from 1989 to 1991, with ...
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(Kluwer Academic Publishers, 1986)The synthesis, characterization and electrochemical behaviour of a new series of copper(II) complexes derivated from substituted anilines and bromosalicylaldehydes have been studied. The complexes show a square-plane ...
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(Springer-Verlag, 1985)In recent years there has been an increasing interest in the study of interpolation procedures preserving some shape defined in the form of a convex constraint, such as: monotonicity, positivity and convexity. In a recent ...
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(1997)We report the reaction of gallic acid with chloroacetic acid and three equivalents of sodium hydroxide. In this reaction, 2,6-dihydroxy-4-carboxyphenoxyacetic acid (A) is produced instead of 2,3-dihydroxy-5-carboxyphenoxyacetic ...
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(1996)Stepwise instability constants of the cuprous complex of the title was determined by spectrophotometric method at different temperatures in dimethylsulfoxide. A comparative study between thermodynamic functions in the ...
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(Elsevier, 1996)FT-IR spectra of the title compounds and derivatives were measured in the range 4000-120 cm-1. A complete experimental spectral assignment has been performed. A simplified normal coordinate treatment orientates some ...
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(1998)Fatty acids and sterols have been isolated and identified from the Chiloé sponges lophon proximum (Ridley 1881) and lophon sp. The structures of these compounds were established by means of spectroscopic evidence and ...
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(1988)Ten Δ5-sterols, making up 77% of the total fraction, and seven 5α-stanol derivatives were identified from the sponge Iophon proximun. The pattern is similar to that found in related sponges. © 1988.
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(1999)C16H24O5, monoclinic, P121/c1 (No. 14), a = 14.941(2) Å, b = 11.213(2) Å, c = 9.888(2) Å, β= 101.4(1)°, V= 1623.9 Å3, Z = 4, Rgt(F) = 0.051, RW(F2) = 0.113, T = 293 K. © by R. Oldenbourg Verlag,.
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(1990)2,4-Dihydroxy-7-methoxy- 1,4-benzoxazin-3-one (DIMBOA), the main hydroxamic acid of wheat, and its decomposition product 6-methoxy-benzoxazolin-2-one (MBOA), inhibited 50% root growth of wild oat, Avena fatua at concentrations ...
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(1999)C12H18I2O2, triclinic, P1̄ (No. 2), a = 10.297(3) Å, b = 11.775(3) Å, c = 12.337(4) Å, α = 93.8(2)°, β = 96.8(3)°, y = 104.6(2)°, V = 1430.1 Å3, Z = 4, Rgt(F) = 0.062, RW(F2) = 0.163, T= 298 K. © by R. Oldenbourg Verlag,.
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Effect of gramine on the feeding behavior of the aphids Schizaphis graminum and Rhopalosiphum padi (1988)The effects of the indole alkaloid gramine on the behavior of the aphids Schizaphis graminum and Rhopalosiphum padi feeding on barley seedlings and on artificial diets were studied. On barley cv. F. Union, which lacks ...
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(1995)This article analyzes the conflict between traditional beliefs, cultural roles, and the search for individuality through the study of Fresia, a young Mapuche woman who renounced shamanistic practice. Her case demonstrates ...
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(Elsevier Ltd, 1998)We discuss the recent appearance of very broad (FWZI∼20000 km s-1) double-peaked Balmer emission lines in the nuclei of the galaxies NGC 1097, Pictor A and M 81. Such profiles are rare, and only found in about 10% of ...
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(1995)In this paper I examine the extent to which contemporary ecological patterns in 42 harvester ant assemblages of three continents can be explained as a result of present-day environments or from differences in the history ...
