159 research outputs found

    Molybdenum‐catalyzed sustainable friedländer synthesis of quinolines

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    Polysubstituted quinolines have beenefficiently synthesized from nitroarenes and glycols,as reducing agents, under dioxomolybdenum(VI)-catalysis. Interestingly, the waste reduction byprod-uct is incorporated into the final heterocycle. Thismethod represents an efficient and sustainablevariant of the Friedla ̈nder synthesis of quinolines.Junta de Castilla y León and FEDER (BU076U16) and Ministerio de Economı´a y Competitividad (MINECO) and FEDER (CTQ2016-75023-C2-1-P

    High elevation watersheds in the southern Appalachians: Indicators of sensitivity to acidic deposition and the potential for restoration through liming

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    Southern Appalachian high elevation watersheds have deep rocky soils with high organic matter content, different vegetation communities, and receive greater inputs of acidic deposition compared to low elevation sites within the region. Since the implementation of the Clean Air Act Amendment in the 1990s, concentrations of acidic anions in rainfall have declined. However, some high elevation streams continue to show signs of chronic to episodic acidity, where acid neutralizing capacity (ANC) ranges from 0 to 20 µeq L-1. We studied three 3rd order watersheds (North River in Cherokee National Forest, Santeetlah Creek in Nantahala National Forest, and North Fork of the French Broad in Pisgah National Forest) and selected four to six 1st order catchments within each watershed to represent a gradient in elevation (849–1526 m) and a range in acidic stream ANC values (11–50 leq L-1). Our objectives were to (1) identify biotic, physical and chemical catchment parameters that could be used as indices of stream ANC, pH and Ca:Al molar ratios and (2) estimate the lime required to restore catchments from the effects of excess acidity and increase base cation availability. We quantified each catchment’s biotic, physical, and chemical characteristics and collected stream, O-horizon, and mineral soil samples for chemical analysis seasonally for one year. Using repeated measures analysis, we examined variability in stream chemistry and catchment characteristics; we used a nested split-plot design to identify catchment characteristics that were correlated with stream chemistry. Watersheds differed significantly and the catchments sampled provided a wide range of stream chemical, biotic, physical and chemical characteristics. Variability in stream ANC, pH, and Ca:Al molar ratio were significantly correlated with catchment vegetation characteristics (basal area, tree height, and tree diameter) as well as O-horizon nitrogen and aluminum concentrations. Total soil carbon and calcium (an indicator of parent material), were significant covariates for stream ANC, pH and Ca:Al molar ratios. Lime requirement estimates did not differ among watersheds but this data will help select catchments for future restoration and lime application studies. Not surprisingly, this work found many vegetation and chemical characteristics that were useful indicators of stream acidity. However, some expected relationships such as concentrations of mineral soil extractable Ca and SO4 were not significant. This suggests that an extensive test of these indicators across the southern Appalachians will be required to identify high elevation forested catchments that would benefit from restoration activities

    Ueber die Reaktion der Böden Deutschlands und ihre Bedeutung

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    Virtuosen-Periode : die Jahre 1839/40-1847

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    VIRTUOSEN-PERIODE : DIE JAHRE 1839/40-1847 Franz Liszt als Künstler und Mensch (-) Virtuosen-Periode : die Jahre 1839/40-1847 (Zweiter Band. I. Abtheilung) ( - ) Einband ( - ) Schmutztitel (I) Titelseite (III) Inhaltsverzeichnis. (V) Drittes Buch. (1839/40-1847.) Virtuosen-Periode. Saus und Braus. (1) I. (Koncert-Reisen 1840-1847.) Koncerte in Wien 1839/40. (3) II. (Koncert-Reisen 1840-1847. Fortsetzung.) Ungarn. (18) III. (Koncert-Reisen 1840-1847. Forts.) Nachspiele. (42) IV. (Koncert-Reisen 1840-1847. Forts.) Leipzig. 1840. (54) V. (Koncertreisen 1840-1847. Fortsetzung.) 1840. London. Am Rhein. Hamburg. (77) VI. (Koncertreisen 1840-1847. Fortsetzung.) Ein Freundschaftsbündnis. (90) VII. (Koncertreisen 1840-1847.) Paris. 1841. (96) VIII. (Koncert-Reisen 1840-1847.) London. Hamburg. Kopenhagen. 1841. (107) IX. (Koncert-Reisen 1840-1847. Fortsetzung.) Nonnenwerth. (124) X. (Koncert-Reisen 1839/40-1847. Fortsetzung.) 1842. Ein großes Jahr. Berlin. (145) XI. (Koncert-Reisen 1839/40-1847. Fortsetzung.) 1842. Ein großes Jahr. (Schluß.) Königsberg. St. Petersburg. Weimar (II). (181) XII. (Koncertreisen 1839/40-1847.) 1843. Norden und Süden. (200) XIII. (Koncertreisen 1840-1847. Fortsetzung.) 1844. Vorspiele zur musikalischen Glanzepoche Weimar´s. (219) XIV. (Koncert-Reisen 1839/40-1847.) 1844. Von Weimar bis Paris. (228) XV. (Koncert-Reisen 1839/40-1847.) 1844. Die Trennung von der Gräfin d'Agoult. (234) XVI. (Koncert-Reisen 1840-1847.) 1844. Ein Wiederbegegnen. (240) XVII. (Koncert-Reisen 1839/40-1847.) 1844/45. Spanien, Portugal. (244) XVIII. (Koncert-Reisen 1839/40-1847. Fortsetzung.) 1845. Die Enthüllungsfeier des Beethoven-Monumentes zu Bonn. (249) XIX. (Koncertreisen 1846-1847.) 1845/47. Schluß der Koncertreisen. (266) XX. (Koncert-Reisen 1840-1847.) 1846/47. Kompositionen. (279) XXI. Ein Rückblick. (285) I. Alphabetisches Personenregister. (296) II. Alphabetisches Sachregister. (303) III. Alphabetisches Länder- und Städteregister. (307) IV. Chronologisches Verzeichnis der Kompositionen Franz Liszt's von 1839/40 bis zum Jahre 1847. (310
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