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Impulsivity is a trait related to inhibitory control which is expressed in a range of behaviours. Impulsive individuals show a decreased ability to tolerate delay of reinforcement, and more impulsive behaviour has been linked to decreased levels of serotonin and dopamine in a number of species. In domestic dogs, impulsivity is implicated in problem(More)
Five of 17 adenoviruses of rhesus or cynomolgus monkey origin induced tumors in newborn hamsters. The tumors appeared between 42 and 280 days after subcutaneous inoculation and had the general characteristics of lymphomas. The tumors were specific by cross-complement fixation tests. An adenovirus recovered from Cercopithecus monkeys appeared to be highly(More)
SUMMARY The experimental activity of a new clinically confirmed antitumor compound, Vincaleukoblastine (C46H58O9N4), (VLB) as the sulfate has been described. Greatest activity was seen against the P-1534 acute lymphocytic leukemia in DBA/2 mice. Late as well as early stages of this leukemia were significantly affected by this com pound. No synergistic or(More)
1. The average oil-body diameter in intact cells of developing linseed (Linum usitatissimum) and safflower (Carthamus tinctorius) cotyledons was similar (about 1.4 micrometer), and there was little change in size after oil bodies were isolated and repeatedly washed. 2. The glycerolipid composition of washed oil bodies from both developing and mature(More)
Elevated B-type natriuretic peptide (BNP) regulates cGMP-phosphodiesterase activity. Its elevation is regarded as an early compensatory response to cardiac failure where it can facilitate sympathovagal balance and cardiorenal homeostasis. However, recent reports suggest a paradoxical proadrenergic action of BNP. Because phosphodiesterase activity is altered(More)
Impulsiveness describes the inability to inhibit behaviour in the presence of salient cues. Trait-level impulsivity exists on a continuum and individual differences can be adaptive in different contexts. While breed related differences in behavioural tendency in the domestic dog (Canis familiaris) are well established, the phenomenon within lines of a breed(More)
Gender and ethnicity are important aspects of children's everyday social relationships, yet little is known about how these social categories influence children's collaborative interactions. In the present study, 322 White (Caucasian) and South Asian boys and girls (mean age, 7.5 years) collaborated in pairs on easy and difficult versions of a model(More)