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The Assimilation of Ureides in Shoot Tissues of Soybeans : 1. CHANGES IN ALLANTOINASE ACTIVITY AND UREIDE CONTENTS OF LEAVES AND FRUITS.
The ureides, allantoin and allantoic acid, are major forms of N transported from nodules to shoots in soybeans (Merr.). Little is known about the occurrence, localization, or properties of the… Expand
Nitrogen fixation by three tropical forage legumes in an acid-soil savanna of Colombia
Abstract The proportion of nitrogen derived from fixation was measured by 15N isotope dilution in three tropical grass-legume pastures on two Oxisols differing in texture over a 3 year period using… Expand
Nitrogen nutrition of seedling grain legumes: some taxonomic, morphological and physiological constraints
Abstract The growth of young plants of the epigeal species Phaseolus vulgaris and Glycine max is compared with that of the hypogeal species Pisum sativum and Vicia faba, with particular reference to… Expand
DISTRIBUTION OF NITRATE REDUCTASE ACTIVITY IN SIX LEGUMES: THE IMPORTANCE OF THE STEM
Summary Nitrate reductase activity (NRA) was measured in leaves, stems and roots of six grain legumes supplied with different nitrate concentrations. The contribution of the stem relative to total… Expand
Identification of CS‐derived compounds formed during heat‐dispersion of CS riot control agent*†
High temperatures are frequently used to disperse 2-chlorobenzylidene malononitrile (CS) riot control agent. We examined airborne CS degradation products heat-dispersed together with CS from… Expand
Ultrastructural Characteristics of Mature Wood of Southern Red Oak ( Quercus Falcata Michx.) and White Oak ( Quercus Alba L.)
The fine structure of mature wood of white oak and southern red oak was studied using ultrathin sections and direct carbon replicas. In most details, the fine structure of the wood of these two… Expand
The Development and Ultrastructure of the Bordered Pit Membrane in the Southern Yellow Pines
- R. J. Thomas
The effects of grazing with and without excretal returns on the accumulation of nitrogen by ryegrass in a continuously grazed upland sward.
Rates of N accumulation were studied on sheep grazed grass swards maintained at a constant height of 5 cm for two growing seasons (1985 and 1986) and receiving no N fertilizer using a tiller tissue… Expand
Rhizobium requirements, nitrogen fixation, and nutrient cycling in forage Arachis
- R. J. Thomas
Nuclear magnetic resonance spectra of benzoyldipeptide esters. A convenient test for racemisation in peptide synthesis
The different chemical shifts of the ester methyl protons in diastereoisomeric benzoyldivalyl methyl esters provides a convenient method for assessing racemisation during peptide synthesis.