Hemocyanin from the freshwater snail Lymnaea stagnalis is a high-molecular-mass copper-containing oxygen-transport protein, which occurs freely dissolved in the hemolymph. It is a glycoprotein ...containing fucose, xylose, 3-O-methylmannose, 3-O-methylgalactose, mannose, galactose, N-acetylgalactosamine and N-acetylglucosamine residues as sugar constituents. The N-glycosidic carbohydrate chains of this glycoprotein were released by hydrazinolysis of a pronase digest and subsequently fractionated as oligosaccharide-alditols on Bio-Gel P-4 followed by Lichrosorb-NH2. Investigation with 500-MHz 1H-NMR spectroscopy, in conjunction with sugar and methylation analysis revealed the lowest-molecular-mass glycan chain to have the structure: (Formula: see text).
Ein definiertes Melamin‐Imid‐Verhältnis in Komplexen kann durch Änderung der sterischen Gegebenheiten an den Wasserstoffbrücken‐Acceptorstellen der Imide eingestellt werden. So werden kristalline ...1:1‐, 1:2‐ und 1:3‐Komplexe von Melamin mit Succinimid, Glutarsäureimid bzw. 1‐N‐Propylthymin (siehe rechts) gebildet.
Hemocyanin from the freshwater snail Lymnaea stagnalis is a high‐molecular‐mass copper‐containing glycoprotein which functions as oxygen carrier in the hemolymph. To release the carbohydrate chains, ...the protein was digested by pronase followed by hydrazinolysis and reduction. The oligosaccharide‐alditols were purified by gel permeation chromatography on Bio‐Gel P‐4, followed by HPLC on a Lichrosorb‐NH2 column. Using 500‐MHz 1H‐NMR spectroscopy, in conjunction with sugar, methylation and deamination analysis, the following seven novel primary oligosaccharide structures could be unravelled.
The architecture of the human language faculty has been one of the main foci of the linguistic research of the last half century. This branch of linguistics, broadly known as Generative Grammar, is ...concerned with the formulation of explanatory formal accounts of linguistic phenomena with the ulterior goal of gaining insight into the properties of the 'language organ'. The series comprises high quality monographs and collected volumes that address such issues. The topics in this series range from phonology to semantics, from syntax to information structure, from mathematical linguistics to studies of the lexicon.
The architecture of the human language faculty has been one of the main foci of the linguistic research of the last half century. This branch of linguistics, broadly known as Generative Grammar, is ...concerned with the formulation of explanatory formal accounts of linguistic phenomena with the ulterior goal of gaining insight into the properties of the 'language organ'. The series comprises high quality monographs and collected volumes that address such issues. The topics in this series range from phonology to semantics, from syntax to information structure, from mathematical linguistics to studies of the lexicon.
To investigate the role and importance of nondirectional electrostatic interactions in mineralization, we explored the use of Langmuir monolayers in which the charge density can be tuned using ...supramolecular interactions. It is demonstrated that, in mixed Langmuir monolayers of bis-ureido surfactants containing oligo(ethylene oxide) and ammonium head groups associated with matching or nonmatching spacers between the two urea groups, the organization is controlled by molecular recognition. These different organizations of the molecules lead to different nucleation behavior in the mineralization of calcium carbonate. The formation of modified calcite and vaterite crystals was induced selectively by different phases of mixed monolayers, and they were characterized by SEM, TEM, and SAED. To understand the influence of the mixed Langmuir monolayers on the crystallization process, we studied the mixtures by means of (π-A) isotherms and Brewster angle microscopy observations. Infrared reflection−absorption spectroscopy experiments were also performed on Langmuir−Schaefer films. From these results, we conclude that the local organization of the two systems discussed here gives rise to differences in both charge density and flexibility that together determine not only polymorph selection and the nucleation face but also the morphology of the resulting crystals.
"This book contains 14 articles by Teun Hoekstra (1953-1998) on core issues in syntactic theory. Some articles focus on the structure of DP, others on the structure of the sentence as a whole, while ...others still deal explicitly with the parallels between the two. The papers are distributed over four sections: ""Argument structure"", ""T-chains"", ""The morpho-syntax of verbal and nominal projections"" and ""Small clauses"". More than half of the articles in this book are published here for the first time or appear for the first time in English. Hoekstra's work is characterized by a fundamental interest in the central questions of syntactic theory, most notably the relation between argument structure and X-bar structure. This concentrated interest led to a deep understanding of the notion of transitivity, with respect to both the status of the external argument and that of the internal argument, where ""status"" refers to both the content and the licensing. In this collection of papers, Hoekstra reports on his insights in these matters. As far as content and licensing of the external argument is concerned, this collection contains papers on the relation between passives and their active counterparts, the parallels between possessives and transitives and the differences and similarities between past participles and infinitives. As to the internal argument, we find papers addressing sentential complementation, verbal affixation and resultatives. And there is a whole section on tense, and its role in keeping the sentence together. One of the papers in this collection is Hoekstra's classic, but hitherto unpublished ""Small clauses everywhere"" (more than 70 pages), which summarizes Hoekstra's views on such issues as resultatives, particle verbs and double object constructions."
To investigate the role and importance of nondirectional electrostatic interactions in mineralization, we explored the use of Langmuir monolayers in which the charge density can be tuned using ...supramolecular interactions. It is demonstrated that, in mixed Langmuir monolayers of bis-ureido surfactants containing oligo(ethylene oxide) and ammonium head groups associated with matching or nonmatching spacers between the two urea groups, the organization is controlled by molecular recognition. These different organizations of the molecules lead to different nucleation behavior in the mineralization of calcium carbonate. The formation of modified calcite and vaterite crystals was induced selectively by different phases of mixed monolayers, and they were characterized by SEM, TEM, and SAED. To understand the influence of the mixed Langmuir monolayers on the crystallization process, we studied the mixtures by means of (pi-A) isotherms and Brewster angle microscopy observations. Infrared reflection-absorption spectroscopy experiments were also performed on Langmuir-Schaefer films. From these results, we conclude that the local organization of the two systems discussed here gives rise to differences in both charge density and flexibility that together determine not only polymorph selection and the nucleation face but also the morphology of the resulting crystals.
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