Effect of biuret on growth and nutrition of Douglas-fir (Pseudotsuga menziesii (Mirb) Franco) seedlings

Xue, Jianming; Sands, R.; Clinton, Peter W.

doi:10.1016/j.foreco.2004.01.042

Cited by 12 publications

(3 citation statements)

References 29 publications

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“…[21][22][23] Relevant research has indicated that a high concentration of biuret in urea fertilizer is toxic to crops, including its seed, foliage, nitrogen metabolism and protein synthesis. [24][25][26] Additional research has shown that biuret impurity in urea fertilizer is a potential factor that enhances nitrite toxicity, 27 and it can affect the yield and composition of potato tubers 28 Therefore, the concentration of biuret is regarded as an important criterion to evaluate the quality of the urea fertilizer. Currently, liquid chromatography is used to measure the concentration of biuret in urea as an accepted method of the Association of Official Analytical Chemists (AOAC) International.…”

Section: Introductionmentioning

confidence: 99%

A diffuse reflectance portable near infrared spectroscopy system for the determination of biuret content in urea fertilizer

Liu

Sheng

et al. 2022

Journal of Near Infrared Spectroscopy

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Simple, rapid, and reliable determination of the biuret content in urea fertilizer is very important for the development of fertilizer industry. A near infrared diffuse reflectance measurement system with a portable spectrometer was developed, in which the reference and dark background spectrum could also be recorded automatically in addition to the absorbance data. The key performances of the proposed NIR system have been tested on urea fertilizer. Numerical experiments showed that the coefficient of determination (R2) of the external validation set was 0.97, with a root mean square error (RMSE) of 0.04%. The ratios of the performance deviation (RPD) value in the calibration and validation sets were 12 and 3.5, respectively. It can be concluded that this NIR system for the determination of biuret content in urea fertilizer may potentially be used as an alternative method to traditional wet chemical methods due to its simplicity, sensitivity, and portability.

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Section: Introductionmentioning

confidence: 99%

A diffuse reflectance portable near infrared spectroscopy system for the determination of biuret content in urea fertilizer

Liu

Sheng

et al. 2022

Journal of Near Infrared Spectroscopy

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“…We hypothesized that stimulation by biuret of tree growth could be a direct metabolically regulated plant response or the results of enhancing soil nutrients, especially N availability through microbially mediated soil processes, or both. These potential properties of biuret could make it an attractive alternative N fertilizer to traditional N [4]. Soil is a heterogeneous mixture of several components, many of which are organic and inorganic compounds of varying compositions and surface activities [5].…”

Section: Introductionmentioning

confidence: 99%

Equations Adsorption Isotherms for Biuret on Soils, Paper and Cortex Plant Application of the Freundlich, Langmuir, Temkin, Elovich, Flory-Huggins, Halsey, and Harkins-Jura

2017

International Journal of Advanced Research in Chemical Science

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“…Biuret, thiobiuret, and dithiobiurets have been known for the past many years 1–5. Biological activities 6–13 and other applications 14–19 of this group of compounds have been reported in recent literature. These systems are generally written as I 1,3 but they are not expected to be stable in this conformation because of severe lone pair electron repulsion.…”

Section: Introductionmentioning

confidence: 99%

Tautomeric preferences and electron delocalization in biurets, thiobiurets, and dithiobiurets: Anab initiostudy

Adane¹,

Bharatam²

2008

Int J of Quantum Chemistry

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ABSTRACT:In several literature reports biuret and its sulfur analogs are reported to exist in their diketo form with general formula H 2 NOCXONHOCYONH 2 (X ϭ O, Y ϭ O, biuret; X ϭ Y ϭ S, dithiobiuret; and X ϭ O, Y ϭ S, thiobiuret). On the other hand, recently reported results on the electronic structure of biguanide analogs (X ϭ Y ϭ NH) demonstrated that a form equivalent to diketo is not the preferred structure. Thus, a systematic ab initio study on the tautomeric preferences of biuret and its sulfur analogs (dithiobiuret and thiobiuret) has been carried out. The results indicate that an interplay of conjugative stabilization and intramolecular hydrogen bonding to play a role in tautomeric preferences. Energy and geometric parameters, natural bond orbital analyses have been employed to understand the chemistry of the title compounds. The results indicate that unlike biguanides, these compounds prefer diketo forms containing hydrogen on the bridging nitrogen (N4) and in a trans-arrangement (1a-4a). However, tautomerization of these keto forms to the corresponding enol isomers was also found to be highly probable.

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Effect of biuret on growth and nutrition of Douglas-fir (Pseudotsuga menziesii (Mirb) Franco) seedlings

Cited by 12 publications

References 29 publications

A diffuse reflectance portable near infrared spectroscopy system for the determination of biuret content in urea fertilizer

A diffuse reflectance portable near infrared spectroscopy system for the determination of biuret content in urea fertilizer

Equations Adsorption Isotherms for Biuret on Soils, Paper and Cortex Plant Application of the Freundlich, Langmuir, Temkin, Elovich, Flory-Huggins, Halsey, and Harkins-Jura

Tautomeric preferences and electron delocalization in biurets, thiobiurets, and dithiobiurets: Anab initiostudy

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