Utsunomiya University

About: Utsunomiya University is a education organization based out in Utsunomiya, Japan. It is known for research contribution in the topics: Laser & Holography. The organization has 4139 authors who have published 6812 publications receiving 91975 citations. The organization is also known as: Utsunomiya daigaku.

Central administration of galanin stimulates feeding behavior in chicks.

Abstract: Galanin is recognized as one of the orexigenic peptides in the brain of mammals and fishes. The amino acid sequence of chicken galanin and its distribution in the brain are similar to those of mammals, suggesting that the brain galanin might be related to feeding regulation in chicks. The purpose of the present study was to investigate whether intracerebroventricular (ICV) injection of galanin affected feeding behavior of chicks (Gallus gallus). The injection of galanin increased food intake of layer and broiler chicks. We also found that the galanin-induced feeding behavior was attenuated in layer chicks by the co-injection of yohimbine and beta-funaltrexamine, which are the antagonists of adrenergic alpha-2 receptor and opioid mu-receptor, respectively. It is therefore possible that the orexigenic effect of galanin is mediated by these receptors.

Pic simulations of femtosecond interactions with mass-limited targets

Abstract: Laser interactions with mass-limited targets are studied here via 2D3V relativistic electromagnetic particle-in-cell (PIC) simulations. We also describe our newly developed code that uses novel efficient algorithms. Damping regions have been implemented in order to eliminate spurious reflection of outgoing electromagnetic waves from boundaries of the simulation box. Mass-limited targets limit undesirable spread of absorbed laser energy out of the interaction zone. Mass-limited target, such as droplets, are shown to enhance the achievable fast ion energy significantly.

Molecular analysis of the Deinococcus radiodurans recA locus and identification of a mutation site in a DNA repair-deficient mutant, rec30.

Abstract: Deinococcus radiodurans strain rec30, which is a DNA damage repair-deficient mutant, has been estimated to be defective in the deinococcal recA gene. To identify the mutation site of strain rec30 and obtain information about the region flanking the gene, a 4.4-kb fragment carrying the wild-type recA gene was sequenced. It was revealed that the recA locus forms a polycistronic operon with the preceding cistrons ( orf105a and orf105b ). Predicted amino acid sequences of orf105a and orf105b showed substantial similarity to the competence-damage inducible protein ( cinA gene product) from Streptococcus pneumoniae and the 2′–5′ RNA ligase from Escherichia coli , respectively. By analyzing polymerase chain reaction (PCR) fragments derived from the genomic DNA of strain rec30, the mutation site in the strain was identified as a single G:C to A:T transition which causes an amino acid substitution at position 224 (Gly to Ser) of the deinococcal RecA protein. Furthermore, we succeeded in expressing both the wild-type and mutant recA genes of D. radiodurans in E. coli without any obvious toxicity or death. The γ-ray resistance of an E. coli recA1 strain was fully restored by the expression of the wild-type recA gene of D. radiodurans that was cloned in an E. coli vector plasmid. This result is consistent with evidence that RecA proteins from many bacterial species can functionally complement E. coli recA mutants. In contrast with the wild-type gene, the mutant recA gene derived from strain rec30 did not complement E. coli recA1 , suggesting that the mutant RecA protein lacks functional activity for recombinational repair.

Continuous Hydrothermal Synthesis of Nickel Ferrite Nanoparticles Using a Central Collision-Type Micromixer: Effects of Temperature, Residence Time, Metal Salt Molality, and NaOH Addition on Conversion, Particle Size, and Crystal Phase

Abstract: Continuous hydrothermal synthesis of nickel ferrite nanoparticles from Fe(NO3)3 and Ni(NO3)2 was performed using a central collision-type micromixer developed for rapid heating of a starting soluti...