The Experts below are selected from a list of 41412 Experts worldwide ranked by ideXlab platform
Burkhard Bechinger - One of the best experts on this subject based on the ideXlab platform.
-
Dynamic Nuclear Polarization / solid-state NMR of membranes. Thermal Effects and sample geometry.
Solid state nuclear magnetic resonance, 2019Co-Authors: Evgeniy S. Salnikov, Fabien Aussenac, Sebastian Abel, Armin Purea, Paul Tordo, Olivier Ouari, Burkhard BechingerAbstract:Abstract Whereas specially designed dinitroxide biradicals, reconstitution protocols, oriented sample geometries and NMR probes have helped to much increase the DNP enhancement factors of membrane samples they still lag considerably behind those obtained from glasses made of protein solutions. Here we show that not only the MAS rotor material but also the distribution of the membrane samples within the NMR rotor have a Pronounced Effect on the DNP enhancement. These observations are rationalized with the cooling efficiency and the internal properties of the sample, monitored by their T1 relaxation, microwave ON versus OFF signal intensities and DNP Effect. The data are suggestive that for membranes the speed of cooling has a Pronounced Effect on the membrane properties and concomitantly the distribution of biradicals within the sample.
-
Dynamic Nuclear Polarization/solid-state NMR of membranes. Thermal Effects and sample geometry
Solid State Nuclear Magnetic Resonance, 2019Co-Authors: Evgeniy S. Salnikov, Fabien Aussenac, Sebastian Abel, Armin Purea, Paul Tordo, Olivier Ouari, Burkhard BechingerAbstract:Whereas specially designed dinitroxide biradicals, reconstitution protocols, oriented sample geometries and NMR probes have helped to much increase the DNP enhancement factors of membrane samples they still lag considerably behind those obtained from glasses made of protein solutions. Here we show that not only the MAS rotor material but also the distribution of the membrane samples within the NMR rotor have a Pronounced Effect on the DNP enhancement. These observations are rationalized with the cooling efficiency and the internal properties of the sample, monitored by their T-1 relaxation, microwave ON versus OFF signal intensities and DNP Effect. The data are suggestive that for membranes the speed of cooling has a Pronounced Effect on the membrane properties and concomitantly the distribution of biradicals within the sample.
Akira Yamashina - One of the best experts on this subject based on the ideXlab platform.
-
Insulin sensitivity and endothelial function in hypertension: a comparison of temocapril and candesartan.
American Journal of Hypertension, 2005Co-Authors: Hirofumi Tomiyama, Kohki Motobe, Gulnisa Zaydun, Yutaka Koji, Minoru Yambe, Tomio Arai, Toshio Kushiro, Akira YamashinaAbstract:Background Recent studies have suggested that angiotensin-converting enzyme inhibitors (ACEi) have a more Pronounced Effect on endothelial function (END) than angiotensin II receptor blocker (ARB); however, whether this Pronounced Effect is more beneficial to patients with insulin sensitivity (IS) remains uncertain. The present study compared the Effects of ACEi and ARB on END and IS in patients with hypertension. Methods A total of 23 patients with hypertension were given either ACEi or ARB alternatively in a cross-over manner for 8-week intervals. Both END and IS were examined after each treatment period; END was assessed by the response of forearm blood flow to reactive hyperemia and IS by an insulin tolerance test. The plasma levels of bradykinin (BK), NOx, tumor necrosis factor (TNF-α), and adiponectin (Adi) were also measured after each treatment. Results We found that END, BK, and NOx were higher after the ACEi treatment than after the ARB treatment. Although the IS and the Adi levels were similar after both treatments, the TNF-α level was lower after the ARB treatment than after the ACEi. Conclusions We conclude that ACEi and ARB may have similar Effects on insulin sensitivity, irrespective of the more Pronounced Effects of ACEi on endothelial function. The BK-NO pathway might contribute, at least in part, to the Pronounced Effect of ACEi. On the other hand, the underlying mechanisms affecting insulin sensitivity might differ for both treatments. These results suggest that endothelial function is not a major determinant of insulin sensitivity under physiologic conditions.
Nasir Mahmood - One of the best experts on this subject based on the ideXlab platform.
-
Pronounced Effect of ZnTe nanoinclusions on thermoelectric properties of Cu2−x Se chalcogenides
Science China Materials, 2016Co-Authors: Muhammad Umer Farooq, Sajid Butt, Kewei Gao, Xigui Sun, Xiaolu Pang, Asif Mahmood, Waqar Mahmood, Sajid Ullah Khan, Nasir MahmoodAbstract:Metal chalcogenides especially Cu2- x Se has gained much attention in thermoelectric community due to its complex crystal structure and superionic behavior. Here, we report a facile method to improve the thermoelectric efficiency by introducing ZnTe nanoinclusions into the matrix of Cu2- x Se. As a result, a substantial improvement of 32% in electrical conductivity of Cu2- x Se-ZnTe composite is observed. The increase in electrical conductivity is at the expense of Seebeck coefficient, which slightly decreases the power factor of the composite samples than that of pure Cu2- x Se. Furthermore, the introduction of secondary phase facilitates in declining the total thermal conductivity of Cu2- x Se-ZnTe composite up to 34% by suppressing the lattice thermal contributions. Thus, the moderate power factor and lower thermal conductivity values result in an improved figure of merit ( zT ) value of ~0.40 in mid-range temperature (750 K) for Cu2- x Se-ZnTe composite with 10 wt.% of ZnTe, which is about 40% higher than that of its pure counterpart. Hence, it is believed that the incorporation of ZnTe nanoinclusions in the matrix of Cu2- x Se may be an important route to improve the thermoelectric properties of Cu2- x Se based compounds.
-
Pronounced Effect of znte nanoinclusions on thermoelectric properties of cu2 x se chalcogenides
Science China. Materials, 2016Co-Authors: Muhammad Umer Farooq, Sajid Butt, Kewei Gao, Xigui Sun, Xiaolu Pang, Asif Mahmood, Waqar Mahmood, Sajid Ullah Khan, Nasir MahmoodAbstract:Metal chalcogenides especially Cu2- x Se has gained much attention in thermoelectric community due to its complex crystal structure and superionic behavior. Here, we report a facile method to improve the thermoelectric efficiency by introducing ZnTe nanoinclusions into the matrix of Cu2- x Se. As a result, a substantial improvement of 32% in electrical conductivity of Cu2- x Se-ZnTe composite is observed. The increase in electrical conductivity is at the expense of Seebeck coefficient, which slightly decreases the power factor of the composite samples than that of pure Cu2- x Se. Furthermore, the introduction of secondary phase facilitates in declining the total thermal conductivity of Cu2- x Se-ZnTe composite up to 34% by suppressing the lattice thermal contributions. Thus, the moderate power factor and lower thermal conductivity values result in an improved figure of merit ( zT ) value of ~0.40 in mid-range temperature (750 K) for Cu2- x Se-ZnTe composite with 10 wt.% of ZnTe, which is about 40% higher than that of its pure counterpart. Hence, it is believed that the incorporation of ZnTe nanoinclusions in the matrix of Cu2- x Se may be an important route to improve the thermoelectric properties of Cu2- x Se based compounds.
Liu Liu - One of the best experts on this subject based on the ideXlab platform.
-
A more Pronounced Effect of type III resistant starch vs. type II resistant starch on ameliorating hyperlipidemia in high fat diet-fed mice is associated with its supramolecular structural characteristics.
Food & function, 2020Co-Authors: Liu LiuAbstract:The anti-obesity Effects of two categories of resistant starch (RS) including RS2 (isolated from untreated lentil starch, URS) and RS3 (isolated from autoclaved and retrograded lentil starch, ARS) on mice with high-fat (HF) diet-induced obesity and the supramolecular structure-in vivo physiological functionality relationship of RS were investigated. Following 6 consecutive weeks, the obese mice in the two RS administered groups displayed suppression of body/liver weight gain and an improvement in serum glucose/lipid profile, antioxidant status, and gut microbiota structure. Compared with the URS intervention group, the ARS administration resulted in a more Pronounced Effect in controlling body weight, together with a more prominent reduction in blood glucose and triglyceride concentration, as well as a significant increase in the HDL-c level in obese mice. The ARS group also showed an absolute advantage over URS in suppressing the oxidative stress and regulating the liver function induced by the HF diet. Simultaneously, the administration of URS and ARS efficiently suppressed the HF-diet induced alterations in gut microbial ecology, with an obviously decreased ratio of Firmicutes to Bacteroidetes, especially for the ARS group, suggesting its beneficial role in gastrointestinal tract health. The structural characterization results revealed that ARS and URS differed significantly in their supramolecular structural characteristics, where ARS exhibited a higher proportion of crystallinity and double helix content with an X-ray diffraction pattern of a CB type crystal polymorph and a low proportion of molecular inhomogeneity. This study suggested that the difference in the anti-obesity Effect of resistant starches was a consequence of the diversity in their structural features.
Evgeniy S. Salnikov - One of the best experts on this subject based on the ideXlab platform.
-
Dynamic Nuclear Polarization / solid-state NMR of membranes. Thermal Effects and sample geometry.
Solid state nuclear magnetic resonance, 2019Co-Authors: Evgeniy S. Salnikov, Fabien Aussenac, Sebastian Abel, Armin Purea, Paul Tordo, Olivier Ouari, Burkhard BechingerAbstract:Abstract Whereas specially designed dinitroxide biradicals, reconstitution protocols, oriented sample geometries and NMR probes have helped to much increase the DNP enhancement factors of membrane samples they still lag considerably behind those obtained from glasses made of protein solutions. Here we show that not only the MAS rotor material but also the distribution of the membrane samples within the NMR rotor have a Pronounced Effect on the DNP enhancement. These observations are rationalized with the cooling efficiency and the internal properties of the sample, monitored by their T1 relaxation, microwave ON versus OFF signal intensities and DNP Effect. The data are suggestive that for membranes the speed of cooling has a Pronounced Effect on the membrane properties and concomitantly the distribution of biradicals within the sample.
-
Dynamic Nuclear Polarization/solid-state NMR of membranes. Thermal Effects and sample geometry
Solid State Nuclear Magnetic Resonance, 2019Co-Authors: Evgeniy S. Salnikov, Fabien Aussenac, Sebastian Abel, Armin Purea, Paul Tordo, Olivier Ouari, Burkhard BechingerAbstract:Whereas specially designed dinitroxide biradicals, reconstitution protocols, oriented sample geometries and NMR probes have helped to much increase the DNP enhancement factors of membrane samples they still lag considerably behind those obtained from glasses made of protein solutions. Here we show that not only the MAS rotor material but also the distribution of the membrane samples within the NMR rotor have a Pronounced Effect on the DNP enhancement. These observations are rationalized with the cooling efficiency and the internal properties of the sample, monitored by their T-1 relaxation, microwave ON versus OFF signal intensities and DNP Effect. The data are suggestive that for membranes the speed of cooling has a Pronounced Effect on the membrane properties and concomitantly the distribution of biradicals within the sample.
