Publications NMR Mouse Category: Agriculture

New Compositions with Crosslinked and Uncrosslinked Collagen Polydispersions for Systemic Treatments in Agriculture

The main property of collagen polydispersions is their molecular profile, dependent on both raw materials origin and the extraction process. The paper presents collagen extracts from leather byproducts, by thermal and enzymatic hydrolysis at alkaline pH with improved properties by additivation with glycerol and crosslinking with Tara tannin extract. Structural analysis by Dynamic Nuclear Magnetic …

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Unilateral NMR and thermal microscopy studies of vegetable tanned leather exposed to dehydrothermal treatment and light irradiation

Unilateral nuclear magnetic resonance (NMR) and imaging thermal microscopy (imageMHT) were performed on newly obtained and artificially aged vegetable tanned leathers. Calf and sheep leathers tanned with vegetal extracts of mimosa bark, quebracho and chestnut wood were compared. Ageing was simulated by exposing the leather samples to heating at 70 °C in controlled atmosphere at 30% …

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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

Nuclear magnetic resonance (NMR) and NMR imaging (magnetic resonance imaging) offer the possibility to quantitatively and non-invasively measure the presence and movement of water. Unfortunately, traditional NMR hardware is expensive, poorly suited for plants, and because of its bulk and complexity, not suitable for use in the field. But does it need to be? We …

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Transition of stage I to stage II evaporation regime in the topmost soil: High-resolution NMR imaging, profiling and numerical simulation

Bare soils are natural porous media where moisture and transport properties may change considerably. Under very dry conditions, it is predicted that capillary continuity from deeper soil layers to the surface ceases and evaporation decreases drastically because it is only sustained by vapor transport through an increasing dry surface layer (stage II). In this study, …

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Moisture profiles of the upper soil layer during evaporation monitored by NMR

Near‐surface soil moisture profiles contain important information about the evaporation process from a bare soil. In this study, we demonstrated that such profiles could be monitored noninvasively and with high spatial resolution using Nuclear Magnetic Resonance (NMR). Soil moisture profiles were measured in a column exposed to evaporation for a period of 67 days using …

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Optimized slim-line logging NMR tool to measure soil moisture in situ

We report the optimization of a slim-line logging NMR tool carried out by maximizing the signal-to-noise ratio of the NMR measurements. The tool, based on cylindrical permanent magnets of 20 cm length and 5 cm diameter, has a penetration depth of about 2 cm measured from its surface. This is obtained thanks to a large radio frequency coil …

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Low-field NMR logging sensor for measuring hydraulic parameters of model soils

Knowing the exact hydraulic parameters of soils is very important for improving water management in agriculture and for the refinement of climate models. Up to now, however, the investigation of such parameters has required applying two techniques simultaneously which is time-consuming and invasive. Thus, the objective of this current study is to present only one …

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Analysis of Clogging in Constructed Wetlands Using Magnetic Resonance

In this work we demonstrate the potential of permanent magnet based magnetic resonance sensors to monitor and assess the extent of pore clogging in water filtration systems. The performance of the sensor was tested on artificially clogged gravel substrates and on gravel bed samples from constructed wetlands used to treat wastewater. Data indicate that the …

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