1,721,299 research outputs found

    Effects of light modulation on plant photosynthesis process and secondary metabolism

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    Light modulation on plants significantly affects photosynthetic process as well as plant primary and secondary metabolism. To date, four main light modulation ways have been investigated on plants: (i) monochromatic environments arranged with Light Emitting Diodes (LEDs) lamps; (ii) supplemental monochromatic light; (iii) partial light depletion; (iv) spectral shifting films. In the present work, the effect of monochromatic blue (B), red (R) and green (G) light on photosynthesis and secondary metabolism are reviewed. Studies on light modulation provide innovative solutions which allow to either maximize plant growth, thanks to the improvement of photosynthetic performances, or promote the accumulation of nutraceutical molecules in the prospective of a healthy diet

    Organization and sequence of the human gene for the mitochondrial citrate transport protein.

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    The citrate (tricarboxylate) carrier transports citrate (or other tricarboxylates) across the inner membranes of mitochondria in an electroneutral exchange for malate (or other dicarboxylic acids). We have determined the sequence of the human citrate transporter gene from overlapping genomic clones generated by polymerase chain reactions by use of primers and probes based on the rat cDNA sequence and on emerging sequences. The gene is spread over 2.8 kb of human DNA and is divided into eight exons. All the introns are located at the level of the sequences coding for the extramembranous loops (and not for the transmembrane segments) of the mature protein. The open reading frame of the human gene encodes the mature protein consisting of 298 amino acids, preceded by a presequence of 13 amino acids to help to target it into mitochondria. 84 identities and 106 highly conservative substitutions are present in CTPs from man to yeast. In addition, we have determined the sequences of two human pseudogenes related to the citrate carrier gene encompassing the coding sequence of the gene between nucleotides 260 and 72

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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