|个人防护设备||Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter|
The peculiar spectral properties of amino-substituted uracils: a combined theoretical and experimental study.
A detailed experimental and computational study of the absorption and fluorescence spectra of 5-aminouracil (5 AU) and 6-aminouracil (6 AU) in aqueous solution is reported. The lowest energy band of t...Read More
The excited state deactivation of two amino-substituted uracils, 5-aminouracil (5AU) and 6-aminouracil (6AU) in aqueous solution was studied by femtosecond fluorescence upconversion. The fluorescence ...Read More
We're sorry this abstract is currently not available....Read More
Chromosome damage induced in root meristems of Allium cepa L. by an 18-h treatment with 5-aminouracil (AU) was enhanced by 2-h pulses with 5 mM caffeine, the most effective pulse being given from the ...Read More
DNA and protein contents of pairs of sister nuclei were determined using a combined Feulgen-dinitrofluorobenzene technique. Sister nuclei were studied in binucleate cells, induced by treatment with 0....Read More
Meristematic cells of Allium cepa were treated with 5-amino-uracil (5-AU) while incorporating 5-bromodeoxyuridine (BrdU) into DNA until complete inhibition of mitosis was obtained. The pattern of BrdU...Read More
Meristematic cells from Allium cepa L roots can attain a steady-state of growth at both 15 and 25 degrees C in the presence of drugs, hydroxyurea and 5-amino-uracil, which reduce the rate of DNA synth...Read More
The influence of 5-amino uracil (5-AU) was investigated on the cell cycle of log growth and division-synchronized Tetrahymena pyriformis GL. The division index of log growth phase Tetrahymena was supp...Read More
Proliferating plant cells treated during the late S period with 5-aminouracil (AU), give the typical response that DNA-damaging agents induce, characterized by: an important mitotic delay, and a poten...Read More
The psychotropic activity of a series of new aminouracil derivatives was studied on the widely applied models of pharmacological screening in rats. The most expressed antidepressant effect at the stag...Read More
A new fluorescent probe (5-[(4-diethylamino-2-hydroxy-benzylidene)-amino]-1H-pyrimidine-2, 4-dione) (Receptor 1) has been synthesized by the Schiff base condensation of 5-aminouracil with 4-(diethylam...Read More
An interference-free naked-eye recognition of Al(3+) at its micromolar level has been done in 5% aqueous DMSO solution employing a Schiff base 5-[(2-hydroxy-5-nitro-benzylidene)-amino]-1H-pyrimidine-2...Read More
Premature onset of mitosis and potentiation of chromosome damage induced by poly-D-lysine in plant cells: evidence for G2 repair.
Poly-D-lysine has been reported to induce a triggering of mitosis in plant cells due to a selective stimulatory effect on cells arrested in G2. Root-tip cells of Allium cepa L. were first exposed to m...Read More
An effective one-step synthesis of new amide-conjugated nucleosides and their analogues, in the presence of 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride (DMT-MM) as the condensin...Read More
Reproductive death of Chinese hamster V79 cells after exposure to chemical inhibitors of DNA synthesis.
1. The results of this study have contributed to the definition of three categories of chemical inhibitors of DNA replication in mammalian cells. 2. Inhibitors of replicon cluster initiation [4-nitroq...Read More
This work evaluated the qualitative and quantitative cellular changes induced by treatment with 5-aminouracil (5-AU) and a combination of 5-AU and caffeine in plant cells in relation to DNA damage, re...Read More
In the multinucleate cells induced in Allium cepa L. meristems, the nuclei surrounded by the largest cytoplasm environment complete replication earlier (advanced nuclei), but have a longer G2, than th...Read More
Synthesis and spectroscopic studies on the new Schiff base derived from the 1:2 condensation of 2,6-diformyl-4-methylphenol with 5-aminouracil (BDF5AU) and its transition metal complexes. Influence on biologically active peptides-regulating aminopeptidase
The synthesis, spectroscopic (IR, 1H and 13C NMR, UV-Vis-NIR, EPR), magnetic measurements and biological studies of a number of complexes of Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Au(III) and Hg(II) ...Read More
Onion root-tip cells were blocked at S-phase by treating them with 5-aminouracil (5AU). These cells were then further treated with caffeine/2-aminopurine (Caf/2AP) or a combination of both in the pres...Read More
Recognition of 5-aminouracil (U(#)) in the central strand of a DNA triplex: orientation selective binding of different third strand bases.
A necessary feature of the natural base triads for triplex formation is the requirement of a purine (A or G) in the central position, since only these provide sets of two hydrogen bond donors/acceptor...Read More
Novel 3-cyano-2-(3-uracilyl-5-amino) pyrazolo [1,5-a]pyrimidine has been synthesized using 5-aminouracil as a starting material....Read More