다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

Two-photon excitation provides a means of activating chemical or physical processes with high spatial resolution in three dimensions and has made possible the development of three-dimensional fluorescence imaging, optical data storage, and lithographic microfabrication. These applications take advantage of the fact that the two-photon absorption probability depends quadratically on intensity, so under tight-focusing conditions, the absorption is confined at the focus to a volume of order λ3 (where λ is the laser wavelength). Any subsequent process, such as fluorescence or a photoinduced chemical reaction, is also localized in this small volume. Although three-dimensional data storage and microfabrication have been illustrated using two-photon-initiated polymerization of resins incorporating conventional ultraviolet-absorbing initiators, such photopolymer systems exhibit low photosensitivity as the initiators have small two-photon absorption cross-sections (δ). Consequently, this approach requires high laser power, and its widespread use remains impractical. Here we report on a class of π;-conjugated compounds that exhibit large δ (as high as 1, 250 × 10−50 cm4 s per photon) and enhanced two-photon sensitivity relative to ultraviolet initiators. Two-photon excitable resins based on these new initiators have been developed and used to demonstrate a scheme for three-dimensional data storage which permits fluorescent and refractive read-out, and the fabrication of three-dimensional micro-optical and micromechanical structures, including photonic-bandgap-type structures.

Two-photon polymerization initiators for three-dimensional optical data storage and microfabrication

Metal–organic frameworks (MOFs) have received a lot of attention because of their diverse structures, tunable properties and multiple applications such as gas storage, catalysis and magnetism. Recently, there has been a rapidly growing interest in developing MOF-based materials for electrochemical energy storage. MOFs have proved to be particularly suitable for electrochemical applications because of their tunable chemical composition that can be designed at the molecular level and their highly porous framework in which fast mass transportation of the related species is favorable. In this review, the recent progress in fabricating MOFs and MOF-derived nanostructures for electrochemical applications is presented. The review starts with an introduction of the principles and strategies for designing targeted MOFs followed by a discussion of some novel MOF-derived structures and their potential applications in electrochemical energy storage and conversion. Finally, major challenges in electrochemical energy storage are highlighted and prospective solutions from current progress in MOF-based nanostructure research are given.

Metal–organic frameworks and their derived nanostructures for electrochemical energy storage and conversion

Nanographenes, or extended polycyclic aromatic hydrocarbons, have been attracting renewed and more widespread attention since the first experimental demonstration of graphene in 2004. However, the atomically precise fabrication of nanographenes has thus far been achieved only through synthetic organic chemistry. The precise synthesis of quasi-zero-dimensional nanographenes, i.e. graphene molecules, has witnessed rapid developments over the past few years, and these developments can be summarized in four categories: (1) non-conventional methods, (2) structures incorporating seven- or eight-membered rings, (3) selective heteroatom doping, and (4) direct edge functionalization. On the other hand, one-dimensional extension of the graphene molecules leads to the formation of graphene nanoribbons (GNRs) with high aspect ratios. The synthesis of structurally well-defined GNRs has been achieved by extending nanographene synthesis to longitudinally extended polymeric systems. Access to GNRs thus becomes possible through the solution-mediated or surface-assisted cyclodehydrogenation, or “graphitization,” of tailor-made polyphenylene precursors. In this review, we describe recent progress in the “bottom-up” chemical syntheses of structurally well-defined nanographenes, namely graphene molecules and GNRs.

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New advances in nanographene chemistry

Magnetic materials and nanostructures based on carbon offer unique opportunities for future technological applications such as spintronics. This paper reviews graphene-derived systems in which magnetic correlations emerge as a result of reduced dimensions, disorder and other possible scenarios. In particular, zero-dimensional graphene nanofragments, one-dimensional graphene nanoribbons and defect-induced magnetism in graphene and graphite are covered. Possible physical mechanisms of the emergence of magnetism in these systems are illustrated with the help of computational examples based on simple model Hamiltonians. In addition, this review covers spin-transport properties, proposed designs of graphene-based spintronic devices, magnetic ordering at finite temperatures as well as the most recent experimental achievements.

https://iopscience.iop.org/article/10.1088/0034-4885/73/5/056501/pdf

Emergence of magnetism in graphene materials and nanostructures

Recent advances in intravascular imaging techniques have made it possible to assess the culprit lesions of acute coronary syndrome (ACS) in the clinical setting. Intravascular ultrasound (IVUS) is the most commonly used intravascular imaging technique that provides cross-sectional images of coronary arteries. IVUS can assess plaque burden and vessel remodeling. Optical coherence tomography (OCT) is a high-resolution (10 μm) intravascular imaging technique that uses near-infrared light. OCT can identify key features of atheroma, such as lipid core and thin fibrous cap. Near-infrared spectroscopy (NIRS) can detect lipid composition by analyzing the near-infrared absorption properties of coronary plaques. NIRS provides a chemogram of the coronary artery wall, which allows for specific quantification of lipid accumulation. These intravascular imaging techniques can depict histological features of plaque rupture, plaque erosion, and calcified nodule in ACS culprit lesions. However, no single imaging technique is perfect and each has its respective strengths and limitations. In this review, we summarize the implications of combined use of multiple intravascular imaging techniques to assess the pathology of ACS and guide lesion-specific treatment.

/pdf/combined-use-of-multiple-intravascular-imaging-techniques-in-2md8x4rw.pdf

Combined Use of Multiple Intravascular Imaging Techniques in Acute Coronary Syndrome

https://onlinelibrary.wiley.com/doi/pdf/10.1002/ajoc.202000132

Chiral Tetraarylmethane Derivative with Metal Coordinating Ability

フラクタル格子により生成されるマルチスケール誘起乱流の構造とスカラー拡散機構 : 第1報,dnsによるフラクタル基本形状の影響に関する検討(流体工学,流体機械)

Shuhei Sasaki, Kazunori Suga, Yoshifumi Sakuma, Isao Fujizuka, Kikuo Seo, Shuji Minato, Toshiyuki Akasaka, Takashi Kubo and Tsutomu Ohori Department of Urology, School of Medicine, Iwate Medical University (Director: Prof. T. Ohori) Ikuhiko Yoshida and Hiroyuki Ogura Department of Urology, Iwate Prefectual Central Hospital Susumu Numasato and Koichi Handa Department of Urology, Morioka Red Cross Hospital Nobuyuki Suzuki Department of Urology, Hachinohe Red Cross Hospital Mitsuru Ohinata Department of Urology, Kazuno Kumiai General Hospital Yoshiaki Banya Department of Urology, Yamamoto Kumiai General Hospital

/pdf/changes-of-the-renal-function-after-permanent-urinary-4qen2n8vzk.pdf

Changes of the renal function after permanent urinary diversion

We evaluated the concentrations of immunoreactive epidermal growth factor (EGF) in urine samples from 14 patients with renal cell carcinoma, 16 patients with bladder tumor and 43 nonmalignant controls by using radioimmunoassay. In the non-malignant controls, urinary EGF excretion significantly decreased with age (r=-0.46, p<0.01), and females excreted significantly more

http://repository.kulib.kyoto-u.ac.jp/dspace/bitstream/2433/117320/1/37_1229.pdf

Takashi Kubo

Papers

Combined Use of Multiple Intravascular Imaging Techniques in Acute Coronary Syndrome

Chiral Tetraarylmethane Derivative with Metal Coordinating Ability

フラクタル格子により生成されるマルチスケール誘起乱流の構造とスカラー拡散機構 : 第1報,dnsによるフラクタル基本形状の影響に関する検討(流体工学,流体機械)

Changes of the renal function after permanent urinary diversion

Epidermal growth factor in the urine of patients with renal cell carcinoma and bladder tumor