Introduction and background Aflatoxins are a hazard in foods because they are potent carcinogens, capable of causing cancer in nearly all animal species studied. Aflatoxins are also acute, chronic and genotoxic poisons (1). In addition, recent evidence suggests strongly that aflatoxins can be immunosuppressive (2). The primary sources of aflatoxins are the common fungi Aspergillus flavus and th...

We recently reported that formation of allopolyploid wheat was accompanied by rapid nonrandom changes in low-copy noncoding DNA sequences. In this report we show that following allopolyploidization, changes also occurred in coding sequences. Genomic DNA of nine different newly synthesized amphiploids of different ploidy levels and their parental lines was digested with five restriction enzymes ...

1 Laboratory of Immunobiology, Department of Marine Life Sciences, Jeju National University, Jeju 690-756, Korea; E-Mail: [email protected] 2 Department of Urology, Chungbuk National University College of Medicine, Cheongju 361-763, Korea; E-Mail: [email protected] 3 Department of Biochemistry, College of Oriental Medicine, Dongeui University, Busan 614-052, Korea 4 Department of Biomater...

The striking similarity between the solar distribution of r-element abundances in the 56 ≤ Z ≤ 76 range and the corresponding abundance pattern observed in the ultra-metalpoor star CS 22892-052 is analysed. It is found that such an observation does not necessarily imply that the whole A >∼ 70 distribution of r-nuclides, including Th, suspected to have been engulfed in CS 22892-052 at the same t...

the yield loss simulation (yls) and the macros liq.csm models were used to simulate the effect of stem borer damage at a detillering rate of 5, 15, 30, 60% at vegetative, panicle initiation and grain filing stages, on yield of rice cultivar?s ratna. this stem borer damage during vegetative and panicle initiation stages was not simulated appropriately by both the models. relatively macros simula...

Loss of maternal UBE3A causes Angelman syndrome (AS), a neurodevelopmental disorder associated with severe epilepsy. We previously implicated GABAergic deficits onto layer (L) 2/3 pyramidal neurons in the pathogenesis of neocortical hyperexcitability, and perhaps epilepsy, in AS model mice. Here we investigate consequences of selective Ube3a loss from either GABAergic or glutamatergic neurons, ...

First results are reported of a new abundance study of neutron-capture elements in the ultra-metal-poor (&sqbl0;Fe&solm0;H&sqbr0;=-3.1) halo field giant star CS 22892-052. Using new high-resolution, high signal-to-noise ratio spectra, abundances of more than 30 neutron-capture elements (Z>30) have been determined. Six elements in the 40<Z<56 domain (Nb, Ru, Rh, Pd, Ag, and Cd) have been detecte...

The aim of this study was to develop a protocol for the in vitro conservation of sweet potato genotypes using the slow growth technique. The first experiment was conducted in a 4 × 5 × 2 factorial scheme, testing four genotypes (IPB-007, IPB-052, IPB-072, and IPB-137), five concentrations of abscisic acid (ABA) (0.0, 1.0, 2.0, 4.0, and 8.0 mg·L⁻¹), and two temperatures (18 and 25°C). The second...

the performance of different yield loss models from an exponential family was evaluated in safflower-redroot pigweed systems in two field experiments conducted during 2007 and 2008 growing seasons at the research field of agricultural college of shiraz university, iran. the yield loss of safflower was recorded as relative yield loss in experimental plots laid out in split plot design with three...