Εμφανίζονται 1 - 19 Αποτελέσματα από 19 για την αναζήτηση '"Cellulose analysis"', χρόνος αναζήτησης: 0,93δλ Περιορισμός αποτελεσμάτων
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    Academic Journal
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    eBook

    Συνεισφορές: Palsule, Sanjay, Series EditorAff1, Mondal, Md. Ibrahim H., editorAff2

    Πηγή: Cellulose-Based Superabsorbent Hydrogels. :789-817

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    Academic Journal

    Συγγραφείς: Betson, Tatiana R, Author, Augusti, Angela, Author, Schleucher, Jürgen, Author

    Συνεισφορές: Betson, Tatiana R, Author, Augusti, Angela, Author, Schleucher, Jürgen, Author

    Πηγή: Analytical Chemistry. 78(24):8406-8411

    Περιγραφή αρχείου: print

    Σύνδεσμος πρόσβασης: https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-6612

    Συνδεδεμένο Πλήρες Κείμενο
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    Academic Journal

    Συνεισφορές: Groebe, A

    Πηγή: J. Radioanal. Chem. 7: No. 1, 49-55(Jan 1971).; Other Information: Orig. Receipt Date: 31-DEC-71

    Περιγραφή αρχείου: Medium: X

    Σύνδεσμος πρόσβασης: http://www.osti.gov/scitech/biblio/4711589

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    Academic Journal

    Συνεισφορές: Byrne, A

    Πηγή: Talanta, 16: 1297-1303(Sept. 1969).; Other Information: Orig. Receipt Date: 31-DEC-69; Bib. Info. Source: UK (United Kingdom (sent to DOE from))

    Περιγραφή αρχείου: Medium: X

    Σύνδεσμος πρόσβασης: http://www.osti.gov/scitech/biblio/4784870

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    Academic Journal

    Συνεισφορές: Muenzel, H

    Πηγή: Radiochim. Acta, 12: 51-2(July 1969).; Other Information: Orig. Receipt Date: 31-DEC-69

    Περιγραφή αρχείου: Medium: X

    Σύνδεσμος πρόσβασης: http://www.osti.gov/scitech/biblio/4775471

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    Academic Journal

    Συνεισφορές: Haller, W

    Πηγή: pp 1306-10 of Modern Trends in Activation Analysis. Vol. II. DeVoe, James R. (ed.). Washington, D. C., National Bureau of Standards, 1969.; Other Information: From International Conference on Modern Trends in Activation Analysis, Gaithersburg, Md. See NBS-Spec. Publ.--312(Vol.2); CONF-681003--(Vol.2). Orig. Receipt Date: 31-DEC-70

    Περιγραφή αρχείου: Medium: X

    Σύνδεσμος πρόσβασης: http://www.osti.gov/scitech/biblio/4748836

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    Academic Journal

    Συνεισφορές: Usmanov, Kh

    Πηγή: Vysokomol. Soedin., Ser. A 12: 957-9(Apr 1970).; Other Information: Orig. Receipt Date: 31-DEC-70

    Περιγραφή αρχείου: Medium: X

    Σύνδεσμος πρόσβασης: http://www.osti.gov/scitech/biblio/4143754

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    Academic Journal

    Συνεισφορές: Visapaeae, A

    Πηγή: Pap. Puu 52: 525-33(1970).; Other Information: Orig. Receipt Date: 31-DEC-71; Bib. Info. Source: FINL (Finland (sent to DOE from))

    Περιγραφή αρχείου: Medium: X

    Σύνδεσμος πρόσβασης: http://www.osti.gov/scitech/biblio/4104536

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    Dissertation/ Thesis
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    Book

    Additional Titles: I assessed the paleoclimatic significance of SD values of pition pine (Pinus edulis and P. monophylla) cellulose nitrate (cn) by developing, testing and applying deterministic and empirical models, in the context of the soil-plant-atmosphere continuum. Stable isotope values of precipitation, soil water, xylem sap, leaf water, atmospheric vapor, annual and sub-annual samples of tree-ring and needle cellulose, and climatic parameters, were measured along a gradient of decreasing summer rain in the southwestern U.S. Stable isotope composition of sap indicated depth of moisture extraction. Over the growing season in New Mexico and Arizona, where monsoon rains are important, trees shifted their water use to shallower depths. In Nevada, where summer rain is scarce, trees shifted to deeper moisture late in the growing season. Evaporation altered δD and δ¹⁸O values of precipitation inputs to soil. Only after heavy monsoons did soil water and sap isotopically resemble recent precipitation. Average precipitation δD values set the baseline for δD(cn). values at each site, but interannual variations in relative humidity and precipitation amount altered wood and leaf δD(cn) values, via leaf water effects. Leaf water (1w) was evaporatively enriched by seasonal moisture stress. δD(1w). and δ¹⁸O(1w) values were strongly correlated with relative humidity on a seasonal basis, but not on a diurnal basis. Measured δ¹⁸O(1w) values fit a steady-state model, with an offset attributable to relative humidity. Measured δD(1w) values were more depleted than predicted by the model, suggesting leaf water - organic matter isotopic exchange. Biochemical fractionation (ε(B)) of hydrogen isotopes between leaf water and cellulose was inversely correlated with relative humidity. Empirical models based on linear regressions demostrated significant correlations between δD(en) values and precipitation seasonality. An El Nirio-Southern Oscillation signal (wood δD(en) values inversely related to winter pr