The low-level task of foreground-background segregation is an important foundation for many high-level computer vision tasks and has been intensively researched in the past. Nonetheless, unregulated environments usually impose challenging problems, especially the difficult and often neglected underwater environment. There, among others, the edges are blurred, the contrast is impaired and the co...

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background & aim: the traditional knowledge about medicinal plants is the basic step in many drug productions. traditional medicine and herbal drug have absorbed attraction of many world authorities. using medicinal plants has developed in many countries even those with a vast use of chemical drugs. ethno-botanical studies result in documentation of many useful plants. in these studies the ...

background and aim: from long time ago, traditional medicine was integrated with popular culture and various aspects of treatment have been allocated to it. at the present time, the use rate of this method depends on people’s belief and recognition. experimental: the research was conducted in the region mobarakeh, iran, in order to identify the priorities for application of medicinal plants by ...

1424 www.thelancet.com Vol 375 April 24, 2010 For the birth defects study see Pediatrics 2010; 125: 836–43 Calls have been made for comprehensive studies into the continuing health eff ects of the Chernobyl nuclear disaster after a rise in birth defects was identifi ed in one of the regions most aff ected by the catastrophe. A study by Wladimir Wertelecki of the University of Southern Alabama, ...

HE standard cultivars of cucumbers, Cucumis sativus L., are monoecious. These monoecious plants are male early in development and female later. The standard races exhibit marked differences in the expression of monoecism, ranging from weak to strong male tendency. Available information suggests that these racial differences reflect genetic variations governing rate of sex conversion during plan...

BACKGROUND BACKGROUND Natural background radiation is the main source of human exposure to radioactive material. Soils naturally have radioactive mineral contents. The aim of this study is to determine natural ((238) U, (232) Th, (40) K) and artificial ((137) Cs) radioactivity levels in wheat and corn fields of Eilam province. METHODS HPGe detector was used to measure the concentration act...

The cacti are one of the most celebrated radiations of succulent plants. There has been much speculation about their age, but progress in dating cactus origins has been hindered by the lack of fossil data for cacti or their close relatives. Using a hybrid phylogenomic approach, we estimated that the cactus lineage diverged from its closest relatives ≈35 million years ago (Ma). However, major di...

Genetic background and developmental stage influence the function of some disease resistance (R) genes. The molecular mechanisms of these modifications remain elusive. Our results show that the two factors are associated with the expression of the R gene in rice Xa3 (also known as Xa26)-mediated resistance to Xanthomonas oryzae pv. oryzae (Xoo), which in turn influences the expression of defens...