A large and diverse group of organic compounds is reported to "regulate" plant growth. Many of the determinations of growth regulation, however, do not measure the accelerating effects on growth but the inhibition of growth or toxicity effects. Such evidence does not suffice to identify the substances as growth regulators which may either accelerate or inhibit the growth process depending upon ...

The last Faraday Society Discussions on Electrode Processes were held in 1947 and marked the onset of an extensive fruitful post-war development of fast reaction techniques in electrochemistry. Considerable information has since been obtained on rate constants of simple inorganic electron transfers, paralleling a similar development in homogeneous reactions, and on electron transfer theory. A t...

Citation: Wünsch UJ, Murphy KR and Stedmon CA (2015) Fluorescence Quantum Yields of Natural Organic Matter and Organic Compounds: Implications for the Fluorescence-based Interpretation of Organic Matter Composition. Front. Mar. Sci. 2:98. doi: 10.3389/fmars.2015.00098 Fluorescence Quantum Yields of Natural Organic Matter and Organic Compounds: Implications for the Fluorescence-based Interpretat...

Citation: Wünsch UJ, Murphy KR and Stedmon CA (2016) Corrigendum: Fluorescence Quantum Yields of Natural Organic Matter and Organic Compounds: Implications for the Fluorescence-based Interpretation of Organic Matter Composition. Front. Mar. Sci. 3:9. doi: 10.3389/fmars.2016.00009 Corrigendum: Fluorescence Quantum Yields of Natural Organic Matter and Organic Compounds: Implications for the Fluor...

Jasmonates are ubiquitously occurring plant growth regulators with high structural diversity that mediate numerous developmental processes and stress responses. We have recently identified 12-O-β-D-glucopyranosyljasmonic acid as the bioactive metabolite, leaf-closing factor (LCF), which induced nyctinastic leaf closure of Samanea saman. We demonstrate that leaf closure of isolated Samanea pinna...

Abbreviations and notes: N = nitrogen; Cu = copper; Fe = iron, Mn = manganese; Mo = molybdenum; Ni = nickel; Se = selenium; Zn = zinc. Sulfur is an essential macronutrient for plants and animals, and is required for many important metabolic functions. Plants are able to convert sulfate (SO 4 ) into organic compounds, but animals must consume S-containing amino acids (methionine and cysteine) fo...

objective(s):solanum acueastrum dunal.has been shown to have some chemotherapeutic value. leaf and berry water and methanol compounds of s. acueastrum were evaluated for possible antileishmanial activity in vivo on balb/c mice and in vitro against leishmania major promastigotes, amastigotes and vero cells.  materials and methods: dry s. aculeastrum berry and leaf material were extracted in meth...

Leaf senescence is a long developmental phase important for plant performance and nutrient management. Cell constituents are recycled in old leaves to provide nutrients that are redistributed to the sink organs. Up to now, metabolomic changes during leaf senescence have been mainly studied in Arabidopsis (Arabidopsis thaliana L.). The metabolite profiling conducted in barley (Hordeum vulgare L....

The Citrus genus includes a large number of species and varieties widely cultivated in the Central Valley of California and in many other countries having similar Mediterranean climates. In the summer, orchards in California experience high levels of tropospheric ozone, formed by reactions of volatile organic compounds (VOC) with oxides of nitrogen (NOx). Citrus trees may improve air quality in...

The chemiluminescence of organic compounds in solution is briefly surveyed with some emphasis on the mechanisms which result in relatively efficient population of an excited state of a product molecule. This is done in terms of the relation = x 'E 1F with particular reference to peroxide compositions. iNTRODUCTION The study of chemiluminescence mechanism in a persistent and systematic fashion i...