High-resolution spectroscopy and single-photon Rydberg excitation of reconfigurable ytterbium atom tweezer arrays utilizing a metastable state

We present an experimental system for Rydberg tweezer arrays with ytterbium (Yb) atoms featuring internal state manipulation between the ground ${}^1$S$_0$ and the metastable ${}^3$P$_2$ states, and single-photon excitation from the ${}^3$P$_2$ to Rydberg states. In the experiments, single Yb atoms are trapped in two-dimensional arrays of optical tweezers and are detected by fluorescence imaging with the intercombination ${}^1$S$_0 \leftrightarrow {}^3$P$_1$ transition, and the defect-free single atom arrays are prepared by the rearrangement with the feedaback. We successfully perform high-resolution ${}^1$S$_0\leftrightarrow {}^3$P$_2$ state spectroscopy for the single atoms, demonstrating the utilities of this ultranarrow transition. We further perform single-photon excitation from the ${}^3$P$_2$ to Rydberg states for the single atoms, which is a key for the efficient Rydberg excitation. We also perform a systematic measurement of a complex energy structure of a series of D states including newly observed ${}^3$D$_3$ states. The developed system shows feasibility of future experiments towards quantum simulations and computations using single Yb atoms.Comment: 10 pages, 9 figure

Oxidation mechanism of black tea pigment theaflavin by peroxidase

A large number of black tea polyphenols remain uncharacterized because of the complexity of catechin oxidation reactions that occur during tea fermentation. In the course of our studies on black tea polyphenols, we examined the enzymatic degradation of theaflavins, which are black tea pigments having a benzotropolone chromophore. Oxidation of theaflavin with peroxidase afforded a new product named theacoumarin A together with known pigment theanaphthoquinone. The structure of the new compound was determined by spectroscopic examination and a production mechanism via theanaphthoquinone is proposed

Measurements of the model parameter in the littlest Higgs model with T-parity

In the Littlest Higgs model with T-parity, we study production processes of new gauge bosons at the international linear collider (ILC). Through Monte Carlo simulations of the production processes, we show that the heavy gauge boson masses can be determined very accurately at the ILC for a representative parameter point of the model. From the simulation result, we also discuss the determination of other model parameters at the ILC.Comment: 4 pages, 2 figures. Talk given at LCWS08, Chicago, November 200

Precision Measurements of Little Higgs Parameters at the International Linear Collider

We investigate a possibility of precision measurements for parameters of the Littlest Higgs model with T-parity at the International Linear Collider (ILC). The model predicts new gauge bosons (AH, ZH, and WH), among which the heavy photon (AH) is a candidate for dark matter. The masses of these new gauge bosons strongly depend on the vacuum expectation value that breaks a global symmetry of the model. Through Monte Carlo simulations of the processes: e+ e- ->AH ZH and e+ e- -> WH+ WH-, we show how precisely the masses can be determined at the ILC for a representative parameter point of the model. We also discuss the determination of the Little Higgs parameters and its impact on the future measurement of the thermal abundance of the dark matter relics in our universe.Comment: 22 pages, 10 figures, 6 tabl

Association between Alkaline Phosphatase and Anemia in Rural Japanese Men: The Nagasaki Islands study

Although bone metabolism is reportedly associated with production and maturation of blood corpuscles, and serum alkaline phosphatase (ALP) levels have been associated with bone metabolism, no published study has investigated the association between ALP and anemia. Furthermore, although ALP is known as an enzyme affected by alcohol consumption, there are no reports in the literature on associations between ALP and the risk of anemia in relation to drinking status. We conducted a cross-sectional study of 907 men aged 30-89 years undergoing a general health check-up to investigate the associations between ALP and anemia in relation to drinking status. Of the 907 participants, 120 men were diagnosed with anemia. The association between ALP and anemia was J-shaped. With the second quartile of ALP (194-228 IU/L) (Q2) as the reference group, the multivariable adjusted OR and 95%CI for anemia were 1.91 (95%CI: 0.96-3.82) for 277 IU/L (Q4). When the analysis was limited to non-drinkers, the associations became stronger with corresponding values of 3.34 (95%CI: 1.28-8.74), 3.18 (95%CI: 1.28-7.88) and 3.22 (95%CI:1.37-7.59). Not only lower but also higher levels of serum ALP are associated with anemia for men, especially non-drinkers. For analyses of associations between ALP and anemia, alcohol consumption should thus be considered a potential confounder

地域住民の高血圧、高脂血症、耐糖能異常に対する健康教育の試み

【目的】厚生労働省による保健事業第四次計画に基づき、平成12年より、個別健康教育が、高血圧、高脂血症、糖尿病、喫煙の4領域において導入されている。その手法に加え、医師講話や運動教室などの集団指導を取り入れた健康教育を長崎県F町で行った。【方法】F町の基本健康診査受診者のうち、血圧が収縮期血圧140-159もしくは拡張期血圧110-139mg/dlのどちらかを満たす者(15人)、総コレステロール値が220-260mg/d(30人)、空腹時血糖が110-139mg/dlもしくは随時血糖が140-199mg/dl(13人)、を対象とした。まず、生活プロフィール調査を行い、コンピュータ・ソフト「知食2.0」により解析し、対象者の食事摂取状況とその問題点、運動の実施状況を把握した。6ヶ月間で計5回の面接を行い、栄養、運動などの生活改善の方向付け、行動の確認および評価を繰り返し行った。また、動機付けのための医師による講話3回に加え運動教室1回、味覚チェック1回、バイキング料理による栄養教育1回を行った。採血は開2, 4, 6(終了時)ヶ月目の計三回行った。【結果】高血圧対象者では収縮期血圧に変化はなかったが拡張期血圧は有意に低下していた。高脂血症対象者では総コレステロール値は有意に上昇していたが、これは総コレステロール中のHDLコレステロールが有意に上昇していることが影響していると思われた。中性脂肪は減少したが、有意ではなかった。血糖値は下降していたが、有意な低下ではなかった、しかし、HbA1cは有意に低下していた。運動面ではウオーキングの推奨により歩行数が増加した。食生活では、摂取カロリーが低下した。また、意識的に肉類より魚介類を摂取するようになった。野菜の摂取量の増加、間食の減少などの行動変容もみられた。また、生活習慣病の原因に対しての理解度が増加した。【結論】今回の健康教育前後では3対象分野においてそれぞれ改善が見られた。また、食事、運動などの行動変容がみられた