Challenge to the North-East passage in the Arctic Ocean by Captain Taketomi - Voyage Plan of the Arctic and Antarctic Oceans by a Japanese ship before World War II -

第7回極域科学シンポジウム/横断セッション:[IA] ニーオルスン観測拠点設立25周年記念横断セッション—北極域の科学（ニーオルスン、GRENE、ArCS)—12月2日（金） 統計数理研究所 3階セミナー室D30

Acetylation Unleashes Protein Demons of Dementia

Aberrant posttranslational modifications of proteins can impair synaptic plasticity and may render neurons vulnerable to degeneration during aging. In this issue of Neuron, Min et al. show that acetylation of the amino acid lysine in the microtubule-associated protein tau prevents its ubiquitin-mediated degradation, resulting in “tau tangles” similar to those of dementias. Other recent studies suggest that lysine hyperacetylation contributes to the accumulation of amyloid β-peptide in Alzheimer's disease and to impaired cognitive function resulting from a trophic factor deficit

On the Characteristics of Modeling Compound Impressinon Materials and a New High Polymer Thermoplastic Impression Material

Currently marketed modeling compound impression materials, and a new thermoplastic high polymer impression material, were compared in terms of their themoplastic characteristics, and their physical and mechanical properties. The twelve kinds of modeling compounds used included both Japanese and foreign products. The new material consists of poly capryl lactone. It must be softened at 72-82℃, but can be used for taking impressions at 48℃. It has higher compressive strength and Young\u27s modulus, but less elasticity than conventional modeling compounds. Its thermal conductivity in low, and its specific heat high. From these factors it is concluded that the new impression material is suitable for a variety of applications including impressions for an individual tray, for complete dentures, or for determining the occlusal relation