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Immobilization of imidazole molecules as proton carriers into MOFs to facilitate proton conduction is a general strategy for developing high proton conductive materials. Herein, we designed two imidazole substituted phthalic acid ligands and constructed two novel MOFs, {[Zr6(OH)16(H3L1)4]Cl8·20H2O}n [Zr-MOF; H3L1 = 2-(1H-imidazol-4-yl) methylaminoterephthalic acid] and {Gd(HCOO)(H2L2)2}n [Gd-MOF; H3L2 = 5-(1H-imidazol-4-yl)methylaminoisophthalic acid] and fully studied their porous nature, stability and water-assisted proton conduction. The resulting Zr-MOF exhibits a high proton conductivity of 1.82 × 10−2 S cm−1 at 98% RH and 80 °C, while Gd-MOF has a proton conductivity of 3.01 × 10−3 S cm−1 at 98% RH and 60 °C. [ABSTRACT FROM AUTHOR]

Objective To explore whether occlusion site affects success rate, methods of recanalization, perioperative complications, and prognosis of the recanalization in chronic internal carotid artery occlusion (CICAO). Methods Thirty - nine patients diagnosed as CICAO from January 2017 to January 2020, and treated by endovascular recanalization were retrospectively reviewed. Baseline information, endovascular procedures, complications, clinical and angiographic prognosis were collected. Effects of occlusion site were analyzed. Results Thirty patients (76.92% ) achieved successful endovascular recanalization. Successful recanalization rates varied among groups with different occlusion sites of extracranial short segment (CI, CI-C2 or CI-C3), medium segment (CI-C4), long segment (CI-C5 or CI-C6) and intracranial short segment (C6 or C6-C7), were 9/11, 8/10, 9/14 and 4/4, respectively. Sole angioplasty with balloon was applied in 7 patients (23.33%), sole stenting in 15 (50%), angioplasty with balloon and stents in 8 (26.67%). Among different occlusion sites of extracranial short, medium, long segment, and intracranial short segment, sole angioplasty with balloon was applied in 0/9, 1/8, 3/9 and 3/4, respectively; while sole stenting was applied in 9/9, 4/8, 1/9 and 1/4, showing a gradually increasing trend. Procedure-related complications were not related with occlusion site. One patient (33.33%) died, while 29 surviving patients during a median clinical follow-up of 16 (4, 27) months with successful recanalization, but one (3.45%) developed ipsilateral minor stroke due to restenosis. With a median angiographic follow-up of 5.50 (3.50, 8.00) months, 2 restenosis and 3 reoclusion were found in 21 patients, all of which came from medium and long segment occlusion. Conclusions Endovascular recanalization is feasible and effective in CICAO with relatively low procedure - related complications. However, success rate of recanalization decreases in groups of long segment occlusion. Application of angioplasty methods differs in groups with varying occlusion sites. Procedure - related complications seems relatively low. While, restenosis and re-occlusion are mostly found in long segment occlusion site. [ABSTRACT FROM AUTHOR]

ABSTRACT In this article, electromagnetic band gap (EBG) structure with T-shaped slits is proposed for suppressing simultaneous switching noise. T-shaped slits, bridges, and the solid ground plane are used to constitute the novel L-EBG structure. Considering a threshold of −35 dB, the stopband of the proposed EBG structure is about 7.29 GHz which is 1.68 GHz wider than that of a conventional L-EBG structure. Measurement results confirm the wide bandwidth of the prototype that is predicted in simulations. In addition, the lower and upper cutoff frequencies are estimated by use of lumped-component circuit models and parallel-plate waveguide models, respectively. Moreover, the IR-drop and dc resistance are examined through simulations. Additionally, common signal integrity issues in a power distribution network such as IR-drop, DC resistance, and eye diagrams are investigated and compared to a conventional L-EBG structure. © 2014 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:419-426, 2015. [ABSTRACT FROM AUTHOR]