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Central Functions of Amino Acids for the Stress Response in Chicks
Yamane, H.,Kurauchi, I.,Denbow, D.M.,Furuse, Mitsuhiro Asian Australasian Association of Animal Productio 2009 Animal Bioscience Vol.22 No.2
The nutritional significance of essential amino acids, as well as non-essential amino acids, is well documented in poultry production with regards to growth performance and protein accretion. However, the function of amino acids in the stress response is still unclear. L-Pipecolic acid, a L-lysine metabolite in the brain, induced a hypnotic and sedative effect acting via the ${\gamma}$- aminobutyric acid receptors. L-Arginine also induced a sedative effect via its metabolism to L-ornithine. In addition, three-carbon nonessential amino acids like L-alanine, L-serine and L-cysteine also induced sedative effects. These facts suggest that the requirement for amino acids in both essential and non-essential types may require reconsideration to add the concept of stress amelioration in the future.
Ellipso-Microscopic Observation of Titanium Surface under UV-Light Irradiation
( K. Fushimi ),( K. Kurauchi ),( T. Nakanishi ),( Y. Hasegawa ),( M. Ueda ),( T. Ohtsuka ) 한국부식방식학회 2016 Corrosion Science and Technology Vol.15 No.6
The ellipso-microscopic observation of a titanium surface undergoing anodization in 0.05 mol dm<sup>-3</sup> of H<sub>2</sub>SO<sub>4</sub> was conducted. During irradiation by ultra-violet (UV) light with a wavelength of 325 nm, the titanium surface allowed for the flow of a photo-induced current and showed up as a bright, patch-like image on an ellipso-microscopic view. The brightness and patch-pattern in the image changed with flowing photo-induced current. The changes in the brightness and the image corresponded to the formation and/or degradation of titanium oxide due to the photo-electrochemical reaction of the oxide. An in situ monitoring using the ellipso-microscope revealed that the film change was dependent on the irradiation light power, by UV-light increases the anodic current and results in the initiation of pitting at lower potentials as compared with the non-irradiated condition.