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  • 1
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The effect of replacing fishmeal with soybean meal in the diet and also partial dietary protein replacement with carbohydrates, on sharpsnout sea bream (Diplodus puntazzo) total lipid fatty acid profile was studied. A group of sharpsnout sea bream of 200 g were fed a diet containing either 0%, 20%, 40% or 60% of protein from soybean meal. In a second experiment, fish (126 g) were fed diets with reduced protein and increased carbohydrate percentages. Fishmeal replacement with soybean meal increases the fish polyunsaturated fatty acids (PUFA) content, mainly due to linoleic acid, which is present in high quantities in soya. But as a consequence, the inclusion of soybean meal produces a significant decrease of the n-3/n-6 relationship (from 2.21±0.07 to 1.66±0.05). Replacement of protein with carbohydrate hardly modifies the diet fatty acid profile. As the fishmeal content decreases, there is a slight reduction of saturated fatty acids, the diet with lowest protein percentage having the highest monounsaturated fatty acids and lowest PUFA proportions. Fat quality indices are similar to those reported in previous studies, and in the case of fish under soy-containing diets, they are favourables. However, fishmeal replacement causes a loss of n-3 fatty acids that is important to compensate using other sources rich in this type of fatty acids.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Boston, USA and Oxford, UK : Blackwell Publishers Inc
    Journal of regional science 39 (1999), S. 0 
    ISSN: 1467-9787
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: In this paper we develop a framework to describe the individual choice of residential location using the microeconomics of discrete choices. The individual is seen as deciding frequency, duration, and location of a set of activities for each potential residential zone, knowing the distribution of goods and activities in space as well as transport costs and travel times. The conditional indirect utility function and its associated willingness to pay function for each zone are obtained, where the roles of accessibility, income, and neighborhood attributes emerge clearly. Zonal utility in discrete location choice models can be specified and interpreted using these functions.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Boston, USA and Oxford, UK : Blackwell Publishing Inc
    Journal of regional science 43 (2003), S. 0 
    ISSN: 1467-9787
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: Abstract We formulate a microeconomic model of residential location choice behavior as an aggregate of the individual behaviors of household members, subject to individual time constraints and a common income budget. A simplified version of the model is estimated from stated preference rank-order data, yielding a function that may be interpretated as a conditional indirect utility function. We consider Box-Tukey transformations, segmentation by income class, and a consistent treatment of data at different rank depths using the simultaneous mixed-estimation method. Measures of the household's willingness-to-pay (through rents) for reducing travel times to work and study in the short run, are interpreted as subjective values of time and compared with such values derived from mode choice models. Our results are plausible, and consistent with recent findings showing that the short-run benefits of transport projects derived by transport models are larger than benefits measured at the land use system.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Boston, USA and Oxford, UK : Blackwell Publishers Inc
    Journal of regional science 40 (2000), S. 0 
    ISSN: 1467-9787
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: We extend the well-known transport users' benefits measure (TUB) for the doubly-constrained spatial interaction model derived by Williams (1976). The original formula expresses the TUB as composed by two terms associated with the origin and the destination zones. First, the TUB is associated here with trips instead of zones, providing a natural interpretation as a rule-of-a-half measure of benefit under inelastic demand (for the short-run case). Second, a TUB formula for the long-run case is derived, that is, when the total number of trips, trip origins, and trip destinations change. We then propose updated measures of accessibility for location behavior.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Contributions to mineralogy and petrology 80 (1982), S. 14-24 
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The core of the El Tormes thermal dome, situated in the central part of one of the main metamorphic belts of the Iberian Peninsula, is formed by garnet-cordierite-biotite-sillimanite pelitic gneisses. These rocks, that very often are cut by minor intrusions of Al-rich S-type granites, are metatexitic gneisses in which there exists garnet showing different stages of resorption and transformation into an aggregate of cordierite±plagioclase±biotite. The garnet, mantled and corroded mainly by cordierite, has never been found to occur in contact with the prismatic sillimanite of the matrix, thus indicating that the continuous reaction Gr+Sill+Q = Cd has taken place. The presence of corroded biotite inside the garnet-rimming cordierite of the aggregates as well as inside the cordierite of the matrix, which usually includes remmants of sillimanite, indicates that the continuous reaction Bi+Sill+Q = Cd+FK+H2O has occurred too. Therefore, a realistic net reaction for these aggretates should be represented by the univariant, at a given $$X_{{\text{H}}_{\text{2}} {\text{O}}} $$ , equilibrium: Biotite+Sillimanite+Garnet+Quartz = Cordierite+K-feldspar+H2O (1) The important garnet resorption near the anatectic granitic veins implies that this process is favoured by a decrease in $$X_{{\text{H}}_{\text{2}} {\text{O}}} $$ , this factor being otherwise buffered by the reaction (1) assemblage. The most probable P-T path, assuming these conditions, consistent with the AFM projection of the former (inferred) and present assemblages in the aggregates and in the matrix, implies a decrease in P coeval with a decrease in T (Fig. 4, path 2). The most reliable P-T determination for the final stage of garnet breakdown through reaction (1), based on the coexistence of the seven phase assemblage garnet — cordierite — biotite — sillimanite — plagioclase — potash feldspar — quartz plus melt, gives 695° C, 4.3 kbar, $$X_{{\text{H}}_{\text{2}} {\text{O}}} $$ = 0.5, The maximum pressure for this process, obtained from the garnet — plagioclase equilibrium, is 6.5±1 kbar at the same temperature. The estimates of the T for the garnet core-garnet included biotite pairs are consistently lower, ca. 550° C, than those obtained for the garnet rim-biotite in aggregates, ca. 645° C, or garnet rim-adjacent cordierite pairs, ca. 695° C. It may, therefore, be supposed that, during their evolution these rocks underwent first an increase in T and then, during the last stages, as garnet and biotite brokedown, a decrease in P and T. This represents an uplift of the core of El Tormes dome under high grade amphibolite to low pressure granulite facies conditions, accompanied by a process of partial melting with local decrase in $$X_{{\text{H}}_{\text{2}} {\text{O}}} $$ . It is suggested, from mineral growth-deformation relationships, that this process took place during the late hercynian deformation phases, P-3 or doming stage.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    International journal of earth sciences 66 (1977), S. 91-98 
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Abstract In this paper the general characteristics of the Hercynian metamorphism in an area situated in the Central-Western part of the Iberian Peninsula are given. This zone is characterised by the presence of a Precambrian series and an Ordovician one affected by three main phases of Hercynian deformation, and by the presence of two different granitic series. Four different metamorphic zones have been established and they are characterised by the appearance of the following index minerals: chlorite, biotite, andalusitecordierite and sillimanite-K feldspar. In each zone the present parageneses are studied according theThompson andBarker methods and a main suite of subfacies belonging to a low pressure metamorphism of Abukuma type is defined. The isograds, though locally have the NW-SE hercynian direction, draw as a whole a transversally elonged dome. These unexpected attitude of the isograds could be originated by the deep socle characteristics.
    Abstract: Résumé Dans ce travail sont présentees les caractéristiques du métamorphisme régional hercynien dans une zone située dans la partie Centre-Occidentale de la Peninsule Iberique. Cette zone est caractérisee par la présence de materiaux proterozoïques et de un Ordovicien discordant afectés par trois phases principales de deformation hercyniennes et par l'existence de deux séries granitiques différentes. Quatre zones métamorphiques caractérisees par l'apparition des mineraux indices suivants y ont été définies: chlorite, biotite, andalousite-cordierite et sillimanite-K feldspath. Dans chaque zone les différentes paragéneses existantes on été analysées par la méthode deThompson etBarker. Cela a permis de définir une suite principale de subfacies qui correspondent a un métamorphisme a basse pression type Abukuma. Les isogrades, bien que coïncidant localement avec la direction hercynienne NW-SE, dessinent dans leur ensemble un dôme allongé transversalement. Cette disposition paradoxale pourrait être due a la nature profonde du socle.
    Notes: Zusammenfassung Die hercynische Metamorphose in einem Gebiet des zentralen Westteiles der Iberischen Halbinsel wird dargestellt. Diese Zone ist charakterisiert durch das Vorhandensein einer präkambrischen sowie einer ordovizischen Serie, die durch drei Hauptphasen hercynischer Deformation geprägt wurden, und zwei verschiedener granitischer Serien. Vier verschiedene metamorphe Zonen werden unterschieden, die durch das Vorkommen der folgenden Index-Minerale gekennzeichnet sind: Chlorit, Biotit, Andalusit-Cordierit und Sillimanit-Kali-Feldspat. In jeder Zone werden die vorhandenen Paragenesen nach der Thompson- und der Barker-Methode untersucht, und eine Subfazies-Abfolge, die zu einer Niederdruckmetamorphose des Abukama-Typs gehört, wird beschrieben. Die Isograden bilden, obwohl sie stellenweise mit der hercynischen NW-SE-Richtung zusammenfallen, insgesamt eine längliche Queraufwölbung. Diese ungewöhnliche Erscheinung könnte auf die große Tiefe des Grundgebirges zurückzuführen sein.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 1547-1553 
    ISSN: 1434-1948
    Keywords: Imidazaboles ; Carbene-borane adducts ; Azole-borane adducts ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The preparation and characterization of five new imidazabole derivatives is reported: 1,5-dibenzyl-4,4,8,8-tetrahydroimidazabole (2), 4,4,8,8-tetrafluoro-1,5-dimethylimidazabole (3), 4,4-difluoro-8,8-dihydro-1,5-dimethylimidazabole (4), 4,4,8,8-tetrachloro-1,5-dimethylimidazabole (5), and 4,4,8,8-tetraethyl-1,5-dimethylimidazabole (6). The structures of compounds 2-6 as dimeric carbene-borane adducts rather than dimeric N-borane adducts are discussed on the basis of NMR (2-6) and X-ray diffraction data (2, 3, 5 and 6).
    Type of Medium: Electronic Resource
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  • 9
    Publication Date: 2022-05-26
    Description: © The Authors, 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Williams, T. L., Senft, S. L., Yeo, J., Martin-Martinez, F. J., Kuzirian, A. M., Martin, C. A., DiBona, C. W., Chen, C., Dinneen, S. R., Nguyen, H. T., Gomes, C. M., Rosenthal, J. J. C., MacManes, M. D., Chu, F., Buehler, M. J., Hanlon, R. T., & Deravi, L. F. (2019). Dynamic pigmentary and structural coloration within cephalopod chromatophore organs. Nature Communications, 10, (2019): 1004, doi:10.1038/s41467-019-08891-x.
    Description: Chromatophore organs in cephalopod skin are known to produce ultra-fast changes in appearance for camouflage and communication. Light-scattering pigment granules within chromatocytes have been presumed to be the sole source of coloration in these complex organs. We report the discovery of structural coloration emanating in precise register with expanded pigmented chromatocytes. Concurrently, using an annotated squid chromatophore proteome together with microscopy, we identify a likely biochemical component of this reflective coloration as reflectin proteins distributed in sheath cells that envelop each chromatocyte. Additionally, within the chromatocytes, where the pigment resides in nanostructured granules, we find the lens protein Ω- crystallin interfacing tightly with pigment molecules. These findings offer fresh perspectives on the intricate biophotonic interplay between pigmentary and structural coloration elements tightly co-located within the same dynamic flexible organ - a feature that may help inspire the development of new classes of engineered materials that change color and pattern.
    Description: We thank Professor Daniel Morse and Dr. Wendy Crookes-Goodson for providing the reflectin antibodies used in this report and Dr. Lydia Mäthger for the photograph in Fig. 4C. They also thank Dr. Amrita Kumar for her SEMs of the granules and pigment-extracted granules in Fig. 4 and Robert Chalkley and Al Burlingame for access to a developmental version of the Protein Prospector software. We also acknowledge that they have complied with all relevant ethical regulations in this study. We gratefully acknowledge support from the National Science Foundation (DMR-1700720, T.L.W., L.F.D., and F.C.) and the Barnett Institute of Chemical and Biological Analysis and the Department of Chemistry and Chemical Biology at Northeastern University (T.L.W., L.F.D). J.J.C.R. was supported by NSF IOS 1557748 and 1664767, NSF HRD-1137725, BSF 2013094 and the Frank R. Lillie and Herbert Rand Summer Research Fellowship from the Marine Biological Laboratory. R.T.H., S.L.S., and A.M.K. are grateful for support from AFOSR grant FA9550–14–1–0134 and the Sholley Foundation. F.J.M.M. and M.J.B acknowledge support from the US Department of Defense, Office of Naval Research (N00014–16–1–233). J.Y., F.J.M.M., and M.J.B. are grateful for support from the National Institutes of Health (U01 EB014976). J.Y. also acknowledges support from Singapore’s Agency for Science, Technology, and Research (A1786a0031). This work was supported by Singapore’s A*STAR Computational Resource Center and the National Supercomputing Center through the use of their high-performance computing facilities.
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 10
    Publication Date: 2018-06-21
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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