IN SITU EFFECTIVE DIFFUSION COEFFICIENT PROFILES IN BIOFILMS USING PULSED FIELD GRADIENT-NUCLEAR MAGNETIC RESONANCE (PFG-NMR) By RYAN SCOTT RENSLOW A thesis submitted in partial fulfillment of the requirements for the degree of MASTERS OF SCIENCE IN CHEMICAL ENGINEERING

نویسندگان

  • RYAN S RENSLOW
  • Haluk Beyenal
  • Ryan Scott Renslow
چکیده

iv List of Tables vii List of Figures vii

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Lithium diffusion in lithium nitride by pulsed-field gradient NMR.

Lithium self-diffusion coefficients are measured for the first time using (7)Li Pulsed-Field Gradient Nuclear Magnetic Resonance (PFG-NMR) in a crystalline inorganic powder of α-Li(3)N between 534 K and 774 K. The diffusion of lithium cations is anisotropic, and the activation energy for the diffusion within the Li(2)N layers was found to be 0.150 ± 0.009 eV.

متن کامل

Anomalous diffusion coefficient in disordered media from NMR relaxation

Application of fractional calculus to the description of anomalous diffusion and relaxation processes in complex media provided one of the most impressive impulses to the development of statistical physics during the last decade. In particular the so-called fractional diffusion equation enabled one to capture the main features of anomalous diffusion. However the price for this achievement is ra...

متن کامل

How to compare diffusion processes assessed by single-particle tracking and pulsed field gradient nuclear magnetic resonance.

Heterogeneous diffusion processes occur in many different fields such as transport in living cells or diffusion in porous media. A characterization of the transport parameters of such processes can be achieved by ensemble-based methods, such as pulsed field gradient nuclear magnetic resonance (PFG NMR), or by trajectory-based methods obtained from single-particle tracking (SPT) experiments. In ...

متن کامل

New Options for Measuring Molecular Diffusion in Zeolites by MAS PFG NMR

1. Introduction Combination of pulsed field gradient (PFG) NMR with magic-angle spinning (MAS) NMR is demonstrated to have remarkable advantages in comparison with conventional PFG NMR, if applied to diffusion measurements in beds of nanoporous particles, notably zeolites. These advantages are based on the effect of line narrowing and concern (i) a prolongation of the intervals during which the...

متن کامل

Measurements of dispersion coefficients in porous media by pulsed field gradient NMR

Dispersion in porous media is currently an important subject that occurs in different domains (processes, environment, oil recovery...). We have used the nuclear magnetic resonance, and more precisely the Pulsed Field Gradient (PFG-NMR) techniques to characterize this phenomenon. A PGSTE sequence (Pulsed Field Gradient Stimulated Echo) is used to measure longitudinal and transversal displacemen...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2009