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BACKGROUND Lung and breast cancers are leading causes of cancer death worldwide. Prior exploratory work has shown that patterns of biochemical markers have been found in the exhaled breath of patients with lung and breast cancers that are distinguishable from those of controls. However, chemical analysis of exhaled breath has not shown suitability for(More)
The outstanding sensitivity of the canine olfactory system has been acknowledged by using sniffer dogs in military and civilian service for detection of a variety of odors. It is hypothesized that the canine olfactory ability is determined by polymorphisms in olfactory receptor (OR) genes. We investigated 5 OR genes for polymorphic sites which might affect(More)
In this work, a chromatographic method for identification of volatile organic compounds was compared with canine recognition. Gas chromatography and mass spectrometry (GC-TOF MS) were used for determination of concentrations of trace gases present in human breath. The technique enables rapid determination of compounds in human breath, at the parts per(More)
Original Papers Qualitative and quantitative changes in dogs' information-seeking behaviours during the subsequent phases of operant conditioning training using a scent lineup, were investigated. Particular interest was paid to behaviours which may have an impact on errors committed by dogs at work in a scent lineup and thus on the reliability of the canine(More)
Animal welfare has become a growing concern affecting acceptability of agricultural systems in many countries around the world. An earlier Judeo-Christian interpretation of the Bible (1982) that dominion over animals meant that any degree of exploitation was acceptable has changed for most people to mean that each person has responsibility for animal(More)
It has long been known that odors and olfaction play a major role in behavioral development and expression in animals. The sense of smell is employed in numerous contexts, such as foraging, mate choice, and predation risk assessment. Indeed, olfaction is the primary sensory modality for most mammals, and many domestic species kept by humans, including(More)
There are studies on the relationship between the position and shape of hair whorls on bovine forehead and phenotypic traits. According to anecdotal beliefs by horse users and handlers, temperamental traits may be related to the position of hair whorls in horses. No previous research on the mechanisms of inheritance of hair whorls has been performed, so the(More)
Antagonistic selection showed no response in the desired direction. This may be due to the high positive genetic correlation realized in the single trait selection lines between the two traits. In a selection experiment with mice at the Zentralinstitut fiir Versuchstiere, Hannover, the effect of selection for the quantitative traits litter size (B), weaning(More)
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