Nuclear magnetic resonance (NMR) technique is a powerful analytical tool in determining the presence of bacterial contaminants in complex biological samples. In this paper, a portable NMR-based (pNMR) biosensor and assay to detect the foodborne bacteria Escherichia coli O157:H7 is reported. It uses antibody-functionalized polymer-coated magnetic nanoparticles as …
Read moreI contributed to the design of a NMR/NQR spectrometer about 20 years ago. An A/D ISA board and a Pulse Programming ISA board (two of three required) and the packaging for a FedEx-sized scanner for a portable Contraband Detector (of hard drugs and high explosives). Two US patents. We won an R&D 100 Award in 1995 for it. Glad to help if needed.
Read moreA portable NMR sensor to measure dynamic changes in the amount of water in living stems or fruit and its potential to measure sap flow Tree Physiol., 35 ( 2015 ), pp. 366 - 375, 10.1093/treephys/tpu105
Read morePortable MRI machine from MIT is 1000x smaller, faster, and cheaper. My PhD work was published as the cover story of Science Translational Medicine (full paper pdf here).. We developed a portable, non-invasive hydration sensor using magnetic resonance that is 1000x smaller, faster, and cheaper than traditional MRI machines. This work has important applications for patients with kidney …
Read moreA portable unilateral nuclear magnetic resonance (NMR) instrument was used to detect in field conditions the water status of leaves of herbaceous crops (Zea mays, Phaseolus vulgaris), mesophyllous trees (Populus nigra), and natural Mediterranean vegetation characterized by water-spending shrubs (Cistus incanus) and water-saving sclerophyllous trees (Quercus ilex).
Read moreWindt CW and Blümler P (2015) A portable NMR sensor to measure dynamic changes in the amount of water in living stems or fruit and its potential to measure sap flow. Tree Physiology 35 : 366-375. Sydoruk, V.A., Fiorani, F., Jahnke, S., Krause, H.J., 2016 Design and Characterization of Microwave Cavity Resonators for Noninvasive Monitoring of ...
Read moreAll you need in one solution Starting with NPK (Nitrogen, Phosphorus and Kalium), our versatile nanosensor can cover any nutrient types and be used on anything from soil to leaf-samples, slurry, manure and water. Simple use and seamless integration Our one-click device and test-kits are easy to operate, giving you a complete digital overview and integrates directly […]
Read moreThe authors of this Science paper applied the ex-situ technique in a portable single-sided sensor device, which, for these experiments, was configured for high resolution NMR spectroscopy. Two concentric U-shaped permanent rare earth magnets (Neodymium-Iron-Boron) were arranged to create a magnetic a "sweet spot" about seven millimeters above the active magnet surface.
Read moreAnother portable NMR sensor with a novel one-sided access magnet design, termed NMR-MOLE (mobile lateral explorer), has been developed by Manz et al. . This sensor is very efficient in terms of sensitivity and penetration depth. The magnet array is based on a barrel magnet operating at 3.3 MHz with a central magnet positioned to provide a ...
Read moreHomeland security experts may soon be getting a valuable new tool for identifying the chemical constituents in suspicious substances. A portable device makes it possible for the first time ever to take high-resolution NMR spectroscopy -- one of the principal tools for chemical analysis -- out of the laboratory and into the field for use on samples of any size.
Read moreIn Situ Investigation of Leaf Water Status by Portable Unilateral Nuclear Magnetic Resonance. ... can be used as an NMR plant sensor to continuously, quantitatively and non-invasively monitor ...
Read moreThe Phyto-NMR sensor is a portable NMR device that employs basic relaxometry to non-invasively measure the amount of liquids in fruits, stems or leaves. The sensor is suitable for use in the greenhouse and the lab. It is typically used to monitor growth dynamics of plant parts in response to environmental conditions such as drought, salt, or ...
Read moreThe mobile nuclear magnetic resonance sensor (NMR) allows for the non-invasive, real-time measurement of water status and dry matter accumulation over seed development. Due to the portable and compact nature of the sensor it may be used to analyse components of a whole fixed plant, for instance a developing fruit (see Windt et al. 2011).
Read moreThe LI‑6400XT has two absolute CO2 and two absolute H2O non-dispersive infrared gas analyzers that provide superior performance in a field-portable system. The gas analyzers are in the sensor head, which allows for real-time measurements with leaf-level environmental feedback control. This is not possible when analyzers are in the console.
Read moreAbstract: Although the portable NMR spectrometers usually have lower signal-to-noise (SNR) and resolution compared to superconducting nuclear magnetic resonance (NMR) spectrometers, they show great advantages in more practical applications, such as fast on-site testing.In recent years, the rapid advances in hardware and experimental methods improved portable NMR spectrometers …
Read moreA portable 1H NMR spectrometer has been applied to whole plants in situ, i.e. in climate rooms and in a greenhouse, to study plant water relations under these conditions.
Read more[45] Blümich B, Haber A, Casanova F, et al. Noninvasive depth profiling of walls by portable nuclear magnetic resonance[J]. Anal Bioanal Chem, 2010, 397(7): 3 117 3 125. [46] Capitani D, Brilli F, Mannina L, et al. In situ investigation of leaf water status by portable unilateral nuclear magnetic resonance[J].
Read moreThe authors of this Science paper applied the ex-situ technique in a portable single-sided sensor device, which, for these experiments, was configured for high resolution NMR spectroscopy.
Read moreThe authors of this Science paper applied the ex-situ technique in a portable single-sided sensor device, which, for these experiments, was configured for high resolution NMR spectroscopy. Two concentric U-shaped permanent rare earth magnets (Neodymium-Iron-Boron) were arranged to create a magnetic a "sweet spot" about seven millimeters above the active magnet surface.
Read moreA portable nuclear magnetic resonance (NMR) sensor with an adjustable 'clamp' structure is constructed for the noninvasive measurement of the aging status of silicone rubber insulators used in the high-voltage power transmission. The Carr–Purcell–Meiboom–Gill sequence was employed to record the 1H NMR transverse relaxation curves of silicone rubber insulators with …
Read moreT2 values from the portable MR sensor exhibited strong (R 2 = 0.996) agreement with benchtop NMR spectrometer. Thermal dehydration induced weight loss of 4 to 11% over 5 to 10 h. Fluid loss induced by thermal dehydration was accurately identified via …
Read moreWater Relations of the cereal leaf and grain as measured by means of a simple, portable NMR sensor . By Carel Windt. Year: 2012. OAI identifier: oai:juser.fz-juelich.de:128958 Provided by: Juelich Shared Electronic Resources. Download PDF: ...
Read moreAs NMR requires high-tech equipment, this method is mainly confined to laboratory studies. Windt and Blümler (2015), however, developed a small-scale portable NMR device to be used under field conditions. Based on a simple analysis of the relaxation signal, a way to measure dynamic changes in the absolute tissue water content, and potentially ...
Read morePortable High-Resolution NMR Sensor Unveiled At Berkeley Date: May 5, 2005 Source: Lawrence Berkeley National Laboratory Summary: Homeland security experts may soon be getting a valuable new tool ...
Read moreA portable NMR sensor to measure dynamic changes in the amount of water in living stems or fruit and its potential to measure sap flow. Carel W Windt Institute of Bio- and Geosciences, IBG-2: Plant Sciences, Forschungszentrum Jülich, Jülich, Germany
Read morePortable NMR Propagator Non-spatially resolved sap flow measurementspatially resolved sap flow measurement. Xylem sap flow: red, stationary water: blue. TR 2.5 s, TE 3.5 ms, NECH 32, 8 averages, SW 200 kH ∆20 δ4 G 063T/ NMR-CUFF around young, 2 m tall poplar tree SW 200 z; ms, ms, max0.63m. Scan time ~11 min.
Read moreThe unique, powerful Profile NMR-MOUSE® probe works hand-in-hand with the Kea2 spectrometer. The Profile NMR-MOUSE is a portable, open NMR sensor equipped with a novel permanent magnet geometry that generates a flat sensitive volume parallel to the scanner surface. The system can measure. Proton density as a function of depth.
Read morestatus.Portable NMR instruments, withlow-field mag-nets, have been designed such that the investigations made possible by NMR relaxation technology can now be extended to field conditions (Raich and Blu¨mer, 2004). Van As et al. (1994) applied a purposely built low-field portable 1H NMR instrument to provide
Read moreWindt CW, Blumler P. A portable NMR sensor to measure dynamic changes in the amount of water in living stems or fruit and its potential to measure sap flow. Tree Physiol. 2015;35:366–75. Article PubMed Google Scholar 18. Van As H, Reinders JEA, De Jager PA, Van de Sanden PACM, Schaafsma TJ.
Read moreThis NMR analysis is described in a paper presented in Physique and in the following Science article ("High-Resolution NMR Spectroscopy with a Portable Single-Sided Sensor" by J. Perlo, V. Demas, F. Casanova, C. A. Meriles, J. Reimer, A. Pines, and …
Read moreWe hypothesize that it is possible to build a noninvasive, portable, nuclear magnetic resonance (NMR)-based sensor that is capable of detecting fluid status. Proton NMR is a technique to obtain information about water in a tissue based on T1 and T2 relaxation times.
Read moreIn order to relate changes in leaf WC to changes in leaf water potential (Ψ leaf) as measured by means of the Scholander pressure chamber (Scholander et al., 1964), NMR plant sensor readings can be combined with pressure-volume (p-v) curve analysis .
Read moreDouble-sided negative turning insert, 80° trigon with inscribed circle diameter of 12.7mm, 4.76mm thick, 0.8mm nose radius, indexing accuracy according to ISO-tolerance class-M, chip-breaker NMR with rounded cutting edges, in grade T9325, a MT-CVD coated functionally graded WC-Co carbide within ISO ranges P15-P35 and M10-M30, for fine to heavy machining of steels and stainless-steels
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