Papers by Naoki Shinyashiki
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2013
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2016
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2016
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2007
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2005
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2015
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2000
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2006
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2000
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2003
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2006
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2007
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 1998
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2016
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2015
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2016
AIP Conference Proceedings, 2013
Background: Although half of HIV-infected patients develop lipodystrophy and metabolic complicati... more Background: Although half of HIV-infected patients develop lipodystrophy and metabolic complications, there exists no simple clinical screening tool to discern the high from the low-risk HIV-infected patient. Thus, we evaluated the associations between waist circumference (WC) combined with triglyceride (TG) levels and the severity of lipodystrophy and cardiovascular risk among HIV-infected men and women. Methods: 1481 HIV-infected men and 841 HIV-infected women were recruited between 2005 and 2009 at the metabolic clinic of the University of Modena and Reggio Emilia in Italy. Within each gender, patients were categorized into 4 groups according to WC and TG levels. Total and regional fat and fat-free mass were assessed by duel-energy x-ray absorptiometry, and visceral adipose tissue (VAT) and abdominal subcutaneous AT (SAT) were quantified by computed tomography. Various cardiovascular risk factors were assessed in clinic after an overnight fast. Results: The high TG/high WC men had the most VAT (208.0694.4 cm 2), as well as the highest prevalence of metabolic syndrome (42.2%) and type-2 diabetes (16.2%), and the highest Framingham risk score (10.366.5) in comparison to other groups (p,0.05 for all). High TG/high WC women also had elevated VAT (150.0697.9 cm 2) and a higher prevalence of metabolic syndrome (53.3%), hypertension (30.5%) and type-2 diabetes (12.0%), and Framingham risk score(2.962.8) by comparison to low TG/low WC women (p,0.05 for all). Conclusions: A simple tool combining WC and TG levels can discriminate high-from low-risk HIV-infected patients.
Transactions of the Materials Research Society of Japan, 2010
We observed molecular dynamics of Dipalmitoyl Phosphatidylcholine liposome water dispersion by di... more We observed molecular dynamics of Dipalmitoyl Phosphatidylcholine liposome water dispersion by dielectric spectroscopy measurement. Statistical analysis of jitter used in the present paper is a new technique developed to observe dielectric behaviors more precisely in higher frequency range from 1 GHz to 30 GHz for time domain reflectometry method. Though the relaxation time obtained shows common temperature dependence, the relaxation time distribution parameter β decreased around the gel-liquid crystalline phase transition temperature with increasing temperature from 36 o C to 48 o C. It is suggested that surrounding water of lipid membrane may form the particular water structure in the LC phase different from bulky water in the gel phase with a change in the mobility for hydrophobic regions of the lipid bilayer.
Transactions of the Materials Research Society of Japan, 2012
Time Domain Reflectometry (TDR), Nuclear Magnetic Resonance (NMR), and Molecular Dynamics (MD) si... more Time Domain Reflectometry (TDR), Nuclear Magnetic Resonance (NMR), and Molecular Dynamics (MD) simulation were employed to characterize water structures in proteinwater mixtures. Dielectric relaxation of water observed by TDR showed broadening of the relaxation time distribution reflecting typical slow dynamics of the water structures in dispersed systems. Water structures of a variety of proteins also can be assessed by the fractal analysis. Corresponding to the slow dynamics, the translational diffusion coefficient of water molecules observed by NMR became smaller as protein concentration increased. We also found an optimal condition in MD simulations of water. Without the combination of these complementary techniques, comprehensive understanding of dynamic structures of water in proteinwater mixtures cannot be obtained.
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014
Water structures in protein-water mixtures and cheeses were examined by Time Domain Reflectometry... more Water structures in protein-water mixtures and cheeses were examined by Time Domain Reflectometry (TDR) and Nuclear Magnetic Resonance (NMR). The relaxation time obtained from TDR increased and the diffusion coefficient obtained from NMR decreased with increasing protein concentration, even if those physical quantities and time scales of respective observation techniques were considerably different. The correlation of these dynamic behaviors obtained from TDR and NMR is also found for water structures in cheeses. Fractal analysis of protein solutions by TDR measurements suggested that water structures in both systems were same with usual dispersion systems much more than solution systems. The fractal analysis with the diagram using geometric characteristics of the whole diagram is effective to characterize various water structures.
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Papers by Naoki Shinyashiki