Results 241 to 250 of about 20,294,078 (287)
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Picryl derivatives of benzo[1,2‐d:4,5‐d′]bistriazole and benzo[1,2‐d:4,5‐d′]bistriazole‐4,8‐dione
Journal of Heterocyclic Chemistry, 1975AbstractIn a previous communication from this laboratory it was reported that benzotriazole reacts with both picryl chloride and picryl fluoride to give 1‐picrylbenzotriazole exclusive of any 2‐picrylbenzotriazole (3). As an extension of this study we have examined the reactions of benzo[1,2‐d:4,5‐d′]bistriazole (I) and benzo[1,2‐d:4,5‐d′]bistriazole‐4,
Jane K. Berlin, Michael D. Coburn
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Charge-transfer-enhanced d–d emission in antiferromagnetic NiPS3
Applied Physics Reviews, 2022The d electron plays a significant role in determining and controlling the properties of magnetic materials. However, the d electron transitions, especially d–d emission, have rarely been observed in magnetic materials due to the forbidden selection rules. Here, we report an observation of d–d emission in antiferromagnetic nickel phosphorus trisulfides
Qishuo Tan +6 more
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National Power and the Structure of Foreign Trade
" Hauser. op. cit. p. iv. " Times (I.ondrmV June 23, 1916, editorial. " Julieii Bcnda, La trahison des clercs (Paris, 1927), p. 72. 6o National Power and Foreign Trade T h u s , P r e z i o s i w a n t e d t o b u i l d u p s t r o n g I t a l i a n i n ...
A. Hirschman
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Journal of Applied Physics, 1984
An introduction to the problem in the title of the paper is attempted, D being a diffusion constant for particles of concentration ν. A general formalism and some special results are outlined which seek to show that, provided one proceeds in an appropriate and consistent manner, either formulation is permissible.
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An introduction to the problem in the title of the paper is attempted, D being a diffusion constant for particles of concentration ν. A general formalism and some special results are outlined which seek to show that, provided one proceeds in an appropriate and consistent manner, either formulation is permissible.
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Metodologías innovadoras y recursos didácticos emergentes desde la investigación educativa., 2019
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Proceedings of the twenty-sixth annual ACM symposium on Principles of distributed computing, 2007
We examine the problem of providing fair bandwidth allocation in distributed storage systems similar to the research prototypes HP FAB and IBM Intelligent Bricks. The problem poses significant new challenges beyond those encountered in network and storage QoS scheduling. Specifically, resources are heterogeneous i.e.
Ajay Gulati, Arif Merchant, Peter Varman
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We examine the problem of providing fair bandwidth allocation in distributed storage systems similar to the research prototypes HP FAB and IBM Intelligent Bricks. The problem poses significant new challenges beyond those encountered in network and storage QoS scheduling. Specifically, resources are heterogeneous i.e.
Ajay Gulati, Arif Merchant, Peter Varman
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Recueil des Travaux Chimiques des Pays-Bas, 1985
AbstractA combination of 11B and 13C NMR spectroscopy with several model compounds has been used to elucidate the nature of the ester formation between borate and D‐mannitol, D‐glucitol, D‐fructose and D‐glucose in aqueous solution at pH 6‐12 and at 25 °C. At high carbohydrate/borate ratios, D‐mannitol shows the selective formation of bis(D‐mannitol) 3,
M. Makkee +2 more
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AbstractA combination of 11B and 13C NMR spectroscopy with several model compounds has been used to elucidate the nature of the ester formation between borate and D‐mannitol, D‐glucitol, D‐fructose and D‐glucose in aqueous solution at pH 6‐12 and at 25 °C. At high carbohydrate/borate ratios, D‐mannitol shows the selective formation of bis(D‐mannitol) 3,
M. Makkee +2 more
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Convenient Synthesis of D‐Talose from D‐Galactose
Chinese Journal of Chemistry, 2010AbstractThe rare and expensive D‐talose was conveniently synthesized from readily available D‐galactose in four steps with an overall yield of 58%. The key step was the inversion of equatorial 2‐OH of galactose to the axial one by SN2 reaction under the modified Lattrell‐Dax reaction conditions.
Hualing Xiao +3 more
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A Novel Cycloocta[d]‐/Barreleno[d]pyridazine Rearrangement
Liebigs Annalen, 1995AbstractAs part of the valence tautomeric system cyclooctatetraene (2) bicyclo[4.2.0]octa‐2,4,7‐triene (3), the monocyclic polyene (2) reacts as a dienophile with the diazadiene 3,6‐bis(trifluoromethyl)‐1,2,4,5‐tetrazine (1) to form after N2‐elimination two products: The 1 : 1‐adduct 6, a cycloocta[d]pyridazine, and the tetracyclic bis‐Diels‐Alder ...
Luzian Baumann +6 more
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Syntheses and CD studies of 5α‐cholesteno[3,2‐d]‐, ‐[2,3‐d]‐ and ‐[3,4‐d]pyrimidines
Liebigs Annalen, 1995AbstractSyntheses of 5α‐cholesteno[3,2‐d]‐ (5a), [2,3‐d]‐ (12a), and [3,4‐d]pyrimidines (15a) have been achieved by using hydroxymethylene derivatives of relevant cholestanones prepared from cholesterol (1). Their CD spectra exhibit at least three Cotton effects between 300 to 200 nm, a first CD band around 290, a second one around 260 and a third one ...
Mashooda Hasan +5 more
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