Search Results - (Author, Cooperation:K. Nishida)

2018-04-27

The American Society for Microbiology (ASM)

0066-4804

1098-6596

Biology

Medicine

2018-06-08

Institute of Physics (IOP)

1367-2630

Physics

2016-03-10

Nature Publishing Group (NPG)

0028-0836

1476-4687

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

Animals ; Cell Lineage ; Cornea/*cytology/*growth & development/physiology ; Corneal Transplantation ; Ectoderm/cytology ; Epithelial Cells/cytology ; Epithelium, Corneal/cytology ; Female ; Humans ; Induced Pluripotent Stem Cells/*cytology ; Lens, Crystalline/cytology ; Mice ; Morphogenesis ; Phenotype ; Rabbits ; *Recovery of Function ; Retinal Pigment Epithelium/cytology

2012-04-27

Nature Publishing Group (NPG)

0028-0836

1476-4687

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

Alleles ; Animals ; Aorta/pathology ; *Autophagy ; Cardiomegaly/etiology ; Constriction, Pathologic/complications ; Cytokines/genetics ; DNA, Mitochondrial/*immunology/*metabolism ; Endodeoxyribonucleases/deficiency/genetics/metabolism ; Heart/physiopathology ; Heart Failure/*etiology/immunology/metabolism/*pathology ; Lysosomes/enzymology/metabolism ; Male ; Mice ; Mitochondria ; Myocarditis/*etiology/*immunology/metabolism/pathology ; Myocardium/pathology ; Myocytes, Cardiac/metabolism/pathology ; Pressure ; RNA, Messenger/genetics/metabolism ; Signal Transduction ; Toll-Like Receptor 9/antagonists & inhibitors/deficiency/immunology/metabolism

2018-08-07

Rockefeller University Press

0022-1007

1540-9538

Medicine

Innate Immunity and Inflammation

1089-7550

AIP Digital Archive

Physics

The magnetic behavior of a chain of N disks are investigated. The critical field Hcri for the discontinuous jump of the magnetization and the coercive force Hc for the fanning mechanism, and the uniaxial magnetic anisotropy constant Ku are estimated as a function of N, the aspect ratio of the disks, and the magnetocrystalline anisotropy constant K1. By comparing the MH loops calculated and the experiments, the values of K1 and N are obtained for an assembly with random orientation of Ba ferrite particles. This value of K1 agrees well with the experimental results obtained by Fujiwara [IEEE Trans. Magn. MAG-23, 3125 (1987)].

Electronic Resource

1089-7550

AIP Digital Archive

Physics

The effect of periods on the accumulation and release of stress in GaAs/AlInAs superlattices structure is reported here. It is observed that in GaAs/AlInAs superlattices, when the Indium (In) content is greater than 10%, stress accumulates monotonically as the number of period increases. In GaAs/AlInAs superlattices with an In content of 5%, the accumulated stress is larger when the number of periods is less than 10. However when the number of periods exceeds 10, it was observed that suddenly there is a significant increase in defects and stress release. However, with any further increase in period number, there is once again an accumulation of stress. © 2002 American Institute of Physics.

Electronic Resource

1471-4159

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Electronic Resource

1077-3118

AIP Digital Archive

Physics

Magnesium diboride (MgB2) single crystals, with a maximum size of 0.5×0.5×0.02 mm3, were grown by the vapor transport method in a sealed molybdenum crucible. A superconducting transition with the onset temperature of 38.6 K was confirmed by both transport and magnetization measurements. The upper critical field anisotropy ratio, Hc2(parallel)ab(0)/Hc2(parallel)c(0), was estimated to be 2.6 from the magnetic field-temperature phase diagram for MgB2 single crystals. © 2001 American Institute of Physics.

Electronic Resource

1089-7690

AIP Digital Archive

Physics

Chemistry and Pharmacology

We report quasielastic neutron scattering results on an amorphous polyimide (AURUM) in a temperature range from 10 to 300 K below the glass transition temperature Tg(=250 °C). As temperature increases from 10 K, anharmonic excess scattering intensity appears at around 200 K or about 300 K below Tg. This excess scattering is very similar to the so-called fast process in picosecond order observed for glass-forming polymers as well as organic and inorganic low molecular weight glass-forming materials. We first analyzed the spectra in a simple way assuming validity of the Bose scaling for the vibrational density of states and a Lorentzian for the additional relaxational process, and found that the excess scattering intensity appears in the frequency range below the Boson peak and the characteristic time is independent of temperature which are common features for the fast processes reported previously. The second analysis using the recent vibration-relaxation (VR) model, which is more realistic, indicated that softening of the vibrational modes may play an important role for the change of spectra from inelastic-like to quasielastic-like. Nevertheless, relaxational process is still necessary to describe the excess scattering although the temperature range examined is very far below Tg. © 1998 American Institute of Physics.

Electronic Resource

1089-7690

AIP Digital Archive

Physics

Chemistry and Pharmacology

A previously reported phase diagram of polyelectrolyte solutions as functions of degree of polymerization and the concentration is improved. The new phase diagram is also intended for salt-free solutions of polyelectrolytes with the constitutional repeating unit -C-CX-, X being a charged group. The main improved point is the crossover concentrations between the dilute and semidilute regimes in the low concentration range of less than 10−2 mol/l, which is based on the recent most reliable experimental data on the persistence length of flexible polyion chains. This phase diagram as well introduces both the concentrated regime, which has been not only theoretically predicted but also experimentally confirmed, and the experimentally newly found swollen regime. Furthermore, it is proposed that the dilute regime is separated into four regions, gaslike, poor order, liquidlike order and crystal. The degrees of orderliness in these regions have been assumed to depend on the ratio δ/ξcent of the amplitude of thermal fluctuations to the mean intermolecular distance. Typically, δ/ξcent=1/5 as the critical Lindemann ratio of melting is assigned for the crossover between the liquidlike order and crystal regions. Interestingly, the most probable region for the formation of a 3-D lattice is located within the experimental approach. © 2001 American Institute of Physics.

Electronic Resource

1089-7690

AIP Digital Archive

Physics

Chemistry and Pharmacology

In a few decades, several characteristic regimes and subregimes have been theoretically presented as functions of concentration C and contour length for flexible polyelectrolyte solutions. However, experimentally only the dilute and semidilute regimes have been well acknowledged. In this study, solutions of sodium poly(styrene sulfonate) are studied at various concentrations ranging from the semidilute regime to the bulk through the concentrated regime using small-angle and intermediate-angle x-ray scattering techniques. We have observed a single scattering peak being characteristic of polyelectrolyte solutions until C=4.1 mol/l. Above C=4.9 mol/l, such a characteristic peak disappears and instead, another new peak appears at higher q's. In the plot of the maximum position qmax vs C, two crossover concentrations are found at C**=1.2 mol/l and C***=4.5 mol/l. The former is a continuous crossover from qmax∼C1/2 to qmax∼C1/4 which can be assigned to the crossover of the semidilute-to-concentrated regime, while the latter is a discontinuous crossover which may be assigned to that of the concentrated-to-swollen regime. In the swollen regime the characteristics of polyelectrolyte solutions are lost. The discontinuous crossover concentration C*** is about half the bulk concentration Cbulk=8.4 mol/l. © 2001 American Institute of Physics.

Electronic Resource

1399-3054

Blackwell Publishing Journal Backfiles 1879-2005

Biology

Electronic Resource

1399-3054

Blackwell Publishing Journal Backfiles 1879-2005

Biology

Electronic Resource

1365-2133

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

We describe a technique to facilitate histopathological detection and quantitative measurement of trace amounts of tissue minocycline.In a patient with minocycline-induced hyperpigmentation, a series of biopsies were taken from the affected skin over a period of 54 months, and examined for tissue minocyclinc deposition. Frozen sections treated with 1 m MgCl2-ethanol yielded minocycline-specific yellowish fluorescence, the location of which corresponded to clumps of granular deposits in the dermis. A decrease in the number of fluorescent granules correlated with the clinical resolution of hyperpigmentation and a significant decrease in the tissue minocycline level. Our data also provide further support for the concept that the pigment granules contain insoluble complexes of minocycline chelated with iron. The fluorescence technique is simple, sensitive, and reproducible.

Electronic Resource

1365-2133

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

We report a patient undergoing haemodialysis, who developed multiple subcutaneous nodules. Histology showed that the noduies were composed of deposits of crystals in the dermis, with an associated foreign-body reaction. The crystalline deposits were identified as calcium oxalate by histochemical staining, polarizing microscopy, and analytical electron microscopy.

Electronic Resource

1365-2133

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

A patient on long-term minocycline therapy developed blue-black discoloration on the legs. Skin biopsy specimens from the pigmented areas were examined by light and electron microscopy and energy-dispersive X-ray microanalysis. Pigmented granules were present at all levels of the dermis and subcutaneous fat tissues. Ultrastructural examination showed electron-dense graular material within the cytoplasm of dermal macrophages and energy-dispersive X-ray microanalysis indicated that the granules contained iron. Thyroid tissue obtained by aspiration biopsy showed the presence of fine brown granules within the cytoplasm of the follicular epithelial cells. An extract of skin from the pigmented areas was subjected to high performance liquid chromatography and minocycline was detected.

Electronic Resource

0005-2760

(Rat thymocy te plasma membrane) ; Lipid composition ; Sphingomyelin deficiency

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Biology

Chemistry and Pharmacology

Medicine

Physics

Electronic Resource

0005-2736

(Mouse lymphoid cell) ; Lipid composition ; Malignancy ; Membrane fluidity ; Plasma membrane

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Biology

Chemistry and Pharmacology

Medicine

Physics

Electronic Resource

0006-291X

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Biology

Chemistry and Pharmacology

Physics

Electronic Resource