نتایج جستجو برای: زئولیت mfi

تعداد نتایج: 2895  

Journal: :Chemical communications 2016
Ning Wang Weizhong Qian Kui Shen Chang Su Fei Wei

Unique bayberry-like MFI zeolites are synthesized through a quasi-solid-state crystallization approach. This hierarchical zeolite structure has a relatively thick shell, densely grown nanocrystals with an ordered packed channel, high mechanical stability, high surface area and a low Si/Al ratio. Its catalytic efficiency for methanol-to-aromatics is significantly higher than that of conventional...

2015
Anna Dencker Katharina S Sunnerhagen Charles Taft Åsa Lundgren-Nilsson

BACKGROUND Fatigue is a common symptom in post-polio syndrome (PPS) and can have a substantial impact on patients. There is a need for validated questionnaires to assess fatigue in PPS for use in clinical practice and research. The aim with this study was to assess the validity and reliability of the Swedish version of Multidimensional Fatigue Inventory (MFI-20) in patients with PPS using the R...

2016
David Shaffer Irene D. Feurer Deborah Crowe Heidi Schaefer

BACKGROUND Desensitization with IVIG and rituximab allows acceptable graft survival in sensitized kidney transplant recipients with preexisting donor-specific antibodies (DSAs) and a positive crossmatch. There is little published data reporting the durability of DSA removal in kidney transplant recipients treated with IVIG and rituximab. METHODS We conducted a 3-year prospective DSA monitorin...

2017
Chang Liu Sue Pang Donna Phelan Daniel C. Brennan Thalachallour Mohanakumar

BACKGROUND Ethylenediaminetetraacetic acid (EDTA) pretreatment has been shown to overcome complement interference in the single-antigen bead (SAB) assay. However, a quantitative evaluation of its impact on the assay for preemptive application to diverse clinical samples is still lacking. METHODS Serum samples from 95 renal transplant candidates were tested with and without EDTA-pretreatment i...

Journal: :Fuel 2021

Ethane dehydroaromatization (EDA) reaction is one of the promising processes to meet growing demand aromatics in future. Zn ion exchanged MFI type aluminosilicate zeolite (Zn/[Al]-MFI) shows high activity on EDA reaction. and Brønsted acid derived from Al sites contribute reaction, but excess strong promote coke formation, leading rapid deactivation. Herein, we have developed a new synthesis me...

Nanosheets of MFI zeolite were successfully synthesized by hydrothermal method and were properly characterized by XRD, FE-SEM, EDX-dot mapping, TEM, FT-IR, N2 adsorption/desorption, NH3-TPD, ICP-AES and TGA techniques. The characterizations of MFI zeolite nanosheets suitably confirmed well synthesized MFI nanostructure, superior specific surface area (695.96m2.g-1) and great mesopores volume. C...

Journal: :Pain medicine 2004
David A Fishbain R B Cutler Brandly Cole J Lewis E Smets H L Rosomoff R Steele Rosomoff

OBJECTIVES The objectives of this study were the following: to determine if fatigue is present in chronic low back pain (LBP) and chronic neck pain patients to a greater extent than in controls (nonpatients); to determine which variables are associated with the presence of fatigue; and to determine which of the above chronic pain patient (CPP) groups is more fatigued. To the authors' knowledge,...

Akram Kazemzadeh Ali Akbar Babaluo, Behruz Bayati Neda Kalantari

Polycrystalline MFI zeolite membranes were prepared on α-alumina tubular support by hydrothermal treatments at 413 K. The synthesized zeolite membranes were characterized by XRD, SEM and single gas permeation. The influence of hydrothermal treatment steps and the calcination time on the zeolite layer formation were investigated. MFI zeolite membrane prepared by four subsequent hydrothermal ...

Journal: :Critical Care 2007
Paul WG Elbers

The report suggests determining the microvascular flow index (MFI), the perfused vessel density (PVD) and the percentage of perfused vessels (PPV). For the MFI a grid is used dividing the screen into four quadrants, and the vessels are scored according to observed flow: 0 = none, 1 = intermittent, 2 = sluggish, 3 = continuous. For the PVD and the PPV, three equidistant horizontal and vertical l...

2001
Robert J. Wood Ronald S. Fearing

Key to the success of the micromechanical flying insect project is developing sensors for flight force measurement. At the lowest level of MFI control is the wing control system which will rely on wing and thorax mounted force sensors. These sensors will have the dual function of stroke by stroke force characterization and system identification as well as use in feedback control for all levels....

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