In this work, the effect of addition iridium on TiO2 and Nb2O5 supports obtained by wet impregnation method was evaluated in photocatalytic degradation 2,4-dichlorophenoxiacetic acid under UV irradiation. The synthetized materials were analyzed different techniques order to determinate their physicochemical properties. general, it observed that modifies surface area, band gap energy enhances cr...

This paper concerns a new class of antiauxins, substances in themselves devoid of activity in the Avena coleoptile section growth test but capable of antagonizing the growth promoting effects of both native and synthetic auxins. These compounds, to which antiauxin activity has not previously been ascribed, are the diortho substituted phenoxyacetic acids. To establish rigorously that a growth in...

We obtained seven kinds of cDNA clones putatively identified as encoding class III chitinases from cDNA libraries constructed from dichlorophenoxyacetic acid (2,4-D)- and benzyl adenine (BA)- treated rice callus. Putative amino acid sequences encoded in these cDNA clones were compared with those of known chitinases of other plants. Two clones coded for homologues that show high similarity to cl...

Macrae, I. C. (Cornell University, Ithaca, N.Y.), and M. Alexander. Metabolism of phenoxyalkyl carboxylic acids by a Flavobacterium species. J. Bacteriol. 86:1231-1235. 1963.-A Flavobacterium sp. isolated from soil and grown in media containing 4-(2,4-dichlorophenoxy) butyric acid metabolized omega-linked 2,4-dichlorophenoxyalkyl carboxylic acids in the series from 3-(2,4-dichlorophenoxy)propio...

BREED, R. S., MURRAY, E. G. D., AND HITCHENS, A. P. 1948 Bergey's manual of determinative bacteriology. 6th ed. The Williams & Wilkins Co., Baltimore, Md. FRED, E. B., AND WAKSMAN, S. A. 1928 Laboratory manual of general microbiology. McGraw-Hill Book Co., Inc. New York. HOOVER, MINTON E. 1952 The action of some herbicides upon the microflora of the soil. M. S. Thesis, Louisiana State Universit...

The nucleic acids ot isolated plant tissues were first shown to be affected by plant growth regulators by Silberger and Skoog (1953). They showed that indoleacetic acid treatment would increase the level of ribonucleic acid (RNA) and deoxyribonucleic acid in tobacco pith tissue. Recently, experiments with excised stems of cucumber seedlings (West, Hanson and Key, 1960), and excised cotton cotyl...

Somatic embryos and rooted plantlets have been regenerated from light-initiated embryogenic callus derived from mature embryos of Picea abies stored seeds. Under a 16 hour photoperiod, mature zygotic embryos were cultured on a modified half-strength Murashige-Skoog medium without NH4NO3 and supplemented with 5 mM glutamine, 4.5 pM N6-benzyladenine (BA) and 10.7 PM naphthalene-acetic acid (NAA) ...