BioNMR
NMR aggregator & online community since 2003
BioNMR    
Learn or help to learn NMR - get free NMR books!
 




Jobs Groups Conferences Literature Pulse sequences Software forums Programs Sample preps Web resources BioNMR issues


» Online Users: 24
0 members and 24 guests
No Members online
Most users ever online was 292, 07-25-2011 at 03:18 PM.
» Welcome!

Welcome, NMR world!


Our visitors map.


» Log in
User Name Not a member yet?
Register Now!
Password
[NMR] Junior postdoctoral position in Barcelona: Optically Detected Magnetic Resonance
Apr 07, 2020 - 5:50 AM - by nmrlearner
nmrlearner's Avatar From The DNP-NMR Blog:

[NMR] Junior postdoctoral position in Barcelona: Optically Detected Magnetic Resonance

Apply at http://jobs.icfo.eu/index.php?detail=485






The Institute of Photonic Sciences (ICFO) in Barcelona, Spain, invites applications for a Junior postdoctoral position in the area of optically detected magnetic resonance.


The successful candidate(s) will join the Atomic Quantum Optics group to carry out research tasks associated with the development of new techniques in atomic physics, magnetometry and magnetic resonance. The candidate will design new magneto-optical sensing approaches that involve atomic and nuclear spin systems.


Relevant ongoing projects in the group include:


Development of microfabricated optically pumped atomic magnetometers operating at the femtotesla sensitivity level, for application in biomagnetic field detection. Part of the EU Quantum Flagship program.
Nuclear magnetic resonance spectroscopy in the ultralow-field regime below earth's magnetic field. Supported by EU Marie Sk?odowska Curie Actions.
Techniques for atomic and nuclear spin polarization in the ultralow-field regime. Supported by EU Regional Development Fund.


Requirements and conditions
Applicants should hold an internationally recognized Ph.D. degree in Physics, Chemistry or closely related field to experimental quantum optics or... [Read More]
0 Replies | 2 Views
SABRE: Chemical kinetics and spin dynamics of the formation of hyperpolarization
Apr 07, 2020 - 5:50 AM - by nmrlearner
nmrlearner's Avatar From The DNP-NMR Blog:

SABRE: Chemical kinetics and spin dynamics of the formation of hyperpolarization

Barskiy, Danila A., Stephan Knecht, Alexandra V. Yurkovskaya, and Konstantin L. Ivanov. “SABRE: Chemical Kinetics and Spin Dynamics of the Formation of Hyperpolarization.” Progress in Nuclear Magnetic Resonance Spectroscopy 114–115 (October 2019): 33–70.


https://doi.org/10.1016/j.pnmrs.2019.05.005.


In this review, we present the physical principles of the SABRE (Signal Amplification By Reversible Exchange) method. SABRE is a promising hyperpolarization technique that enhances NMR signals by transferring spin order from parahydrogen (an isomer of the H2 molecule that is in a singlet nuclear spin state) to a substrate that is to be polarized. Spin order transfer takes place in a transient organometallic complex which binds both parahydrogen and substrate molecules; after dissociation of the SABRE complex, free hyperpolarized substrate molecules are accumulated in solution. An advantage of this method is that the substrate is not modified chemically, and its polarization can be regenerated multiple times by bubbling fresh parahydrogen through the solution. Thus, SABRE requires two key ingredients: (i) polarization transfer and (ii) chemical exchange of both parahydrogen and substrate. While there are several excellent reviews on applications of SABRE, the background of the method is discussed less frequently. In this review we aim to explain in detail how SABRE hyperpolarization is formed, focusing on key... [Read More]
0 Replies | 3 Views
(2020-2025) Protein Crystallization Size, Share, Trends, Growth, Regional Outlook and Forecast - https://sciencein.me/
Apr 06, 2020 - 4:14 AM - by nmrlearner
nmrlearner's Avatar (2020-2025) Protein Crystallization Size, Share, Trends, Growth, Regional Outlook and Forecast - https://sciencein.me/

(2020-2025) Protein Crystallization Size, Share, Trends, Growth, Regional Outlook and Forecast https://sciencein.me/ Read here
0 Replies | 5 Views
Protein Crystallography Market 2019 by Services, Solution, Application, Business Analysis, Currents Trends, Statistics, and Investment Opportunities to 2024 - Daily Science
Apr 06, 2020 - 4:14 AM - by nmrlearner
nmrlearner's Avatar Protein Crystallography Market 2019 by Services, Solution, Application, Business Analysis, Currents Trends, Statistics, and Investment Opportunities to 2024 - Daily Science

Protein Crystallography Market 2019 by Services, Solution, Application, Business Analysis, Currents Trends, Statistics, and Investment Opportunities to 2024 Daily Science Read here
0 Replies | 5 Views
[NMR paper] Effect of Different Cooking Methods on Proton Dynamics and Physicochemical Attributes in Spanish Mackerel Assessed by Low-Field NMR.
Apr 06, 2020 - 4:14 AM - by nmrlearner
nmrlearner's Avatar Effect of Different Cooking Methods on Proton Dynamics and Physicochemical Attributes in Spanish Mackerel Assessed by Low-Field NMR.

Related Articles Effect of Different Cooking Methods on Proton Dynamics and Physicochemical Attributes in Spanish Mackerel Assessed by Low-Field NMR.

Foods. 2020 Mar 21;9(3):

Authors: Sun S, Wang S, Lin R, Cheng S, Yuan B, Wang Z, Tan M

Abstract
The states of protons within food items are highly related to their physical attributes. In this study, the effect of cooking methods including boiling, steaming, roasting and frying on proton dynamics, physicochemical parameters and microstructure of Spanish mackerel was assessed by low-field nuclear magnetic resonance (LF-NMR) and magnetic resonance imaging (MRI) techniques. The treatment of cooking resulted in a significant reduction of proton mobility and declined freedom of protons. The state changes of protons can be monitored easily in an intuitive and non-destructive manner during various cooking process. The treatments of boiling, steaming, roasting and frying resulted in different cooking loss and similar water-holding capability. A significant increase of total carbonyl content and thiobarbituric acid reactive substances was found, while a decrease of the values for free thiols and surface hydrophobicity was observed. The analysis of circular dichroism spectroscopy and cryo-scanning electron microscopy... [Read More]
0 Replies | 16 Views
Shim-on-Chip Design for Microfluidic NMR Detectors
Apr 03, 2020 - 9:41 PM - by nmrlearner
nmrlearner's Avatar From The DNP-NMR Blog:

Shim-on-Chip Design for Microfluidic NMR Detectors

Active shims to achieve high-resolution spectra are crucial parts of the NMR instrumentation. Typically, shims are designed to produce a magnetic correction field corresponding to individual spherical harmonics. Other methods have been proposed (e.g. matrix shims) and the approach described in this article simplify uses flat ribbon cables.




Meerten, S. G. J. van, P. J. M. van Bentum, and A. P. M. Kentgens. “Shim-on-Chip Design for Microfluidic NMR Detectors.” Analytical Chemistry 90, no. 17 (September 4, 2018): 10134–38.


https://doi.org/10.1021/acs.analchem.8b02284.


In this contribution we present a novel system for shimming capillary samples such as used in microuidic NMR probe heads. Due to the small sample size shimming microliter samples using regular shim coils is complicated. Here we demonstrate the use of a series of parallel wires placed perpendicular to B0 as a Shim-on-Chip shim system. This is achieved by placing a ribbon at cable horizontally over the NMR detector, in our case a stripline. The current through each wire of the ribbon cable can be controlled independently employing a 16 channel DAC. This makes for a simple, cheap and easy to construct alternative to regular shim systems. The Shim-on-Chip is, nevertheless, quite exible in creating a magnetic eld which matches the inhomogeneity of the magnet in 1 dimension. The capillary sample geometry is well suited for this type of... [Read More]
0 Replies | 6 Views
» Stats
Members: 3,202
Threads: 22,126
Posts: 22,512
Top Poster: nmrlearner (19,570)
Welcome to our newest member, bpadmanabhan
Powered by vBadvanced CMPS v3.2.2

All times are GMT. The time now is 01:32 PM.



Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
vBCredits II Deluxe v1.2.0 Copyright © 2010 DragonByte Technologies
Copyright, BioNMR.com, 2003-2013
Search Engine Friendly URLs by vBSEO 3.6.0

Map