Kazuya Kawamura

Learn More
The present study was designed to examine the effect of specific opioid agonists on feeding behavior in neonatal chicks. The food intake of broiler chicks was significantly decreased by intracerebroventricular injection of DAMGO and beta-casomorphin, micro-opioid receptor agonists, at 30-min postinjection. In contrast, both delta-opioid receptor agonists(More)
This study was designed to compare the effects of muscimol (GABA(A) agonist), baclofen (GABA(B) agonist) and nipecotic acid (GABA uptake inhibitor) on food intake in two chicken strains (meat-type and layer-type chicks). The intracerebroventricular (ICV) injection of all GABA agents induced hyperphagia in layer-type chicks. However, in broiler chicks, there(More)
The present study was designed to examine the effects of mu- and delta-opioid receptor ligands on feeding behavior in meat-type chicks. Intracerebroventricular (ICV) injection of naltrexone (mu- and delta-antagonist), beta-funaltrexamine (beta-FNA; mu-antagonist), ICI-174,864 (ICI; delta-antagonist), or naloxonazine (NAL; mu1-antagonist) significantly(More)
This study investigated the value of time for commercial vehicles in urban areas and its implications for perceived benefits created by congestion pricing projects. Central questions explored were 1). Do values of time differ among commercial vehicle operators? If so, what explains the differences? 2) Will congestion pricing make particular segments of the(More)
Branched-chain amino acids (BCAAs) are essential amino acids that play a major role in brain energy metabolism. This study was done to elucidate whether central injection of BCAAs influences feeding behavior in chicks. We found that the intracerebroventricular injection of leucine (200 microg) significantly stimulated food intake in neonatal chicks during(More)
OBJECTIVE The purpose of our work was to develop an integrated system with image guidance and deformation simulation for the purpose of accurate needle insertion. METHODS We designed an ultrasound-guided needle insertion manipulator and physical model to simulate liver deformation. We carried out an in vivo experiment using a porcine liver to verify the(More)