Determination and correlation of solubility and thermodynamic properties of pyraclostrobin in pure and binary solvents

Yang, Peng; Du, Shichao; Qin, Yujia; Zhao, Kaifei; Li, Kangli; Hou, Baohong; Gong, Junbo

doi:10.1016/j.jct.2016.05.005

Cited by 56 publications

(54 citation statements)

References 26 publications

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“…Besides, only relatively low amounts of pyraclostrobin can be dissolved in hydrocarbons. [22] To quantify the amount of encapsulated pyraclostrobin in the xylan nanocarriers, the cyclohexane dispersion was transferred to water without prior purification and then filtered through an Amicon ultracentrifugation filter (MWCO: 3000 Da) to separate the particles from the continuous aqueous phase. Only trace amounts of fungicide (< 0.01%) were detected in the aqueous solution by HPLC, proving almost quantitative encapsulation.…”

Section: Resultsmentioning

confidence: 99%

Fungicide‐loaded and biodegradable xylan‐based nanocarriers

et al. 2020

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The delivery of agrochemicals is typically achieved by the spraying of fossil‐based polymer dispersions, which might accumulate in the soil and increase microplastic pollution. A potentially sustainable alternative is the use of biodegradable nano‐ or micro‐formulations based on biopolymers, which can be degraded selectively by fungal enzymes to release encapsulated agrochemicals. To date, no hemicellulose nanocarriers for drug delivery in plants have been reported. Xylan is a renewable and abundant feedstock occurring naturally in high amounts in hemicellulose ‐ a major component of the plant cell wall. Herein, xylan from corncobs was used to produce the first fungicide‐loaded xylan‐based nanocarriers by interfacial polyaddition in an inverse miniemulsion using toluene diisocyanate (TDI) as a crosslinking agent. The nanocarriers were redispersed in water and the aqueous dispersions were proven to be active in vitro against several pathogenic fungi, which are responsible for fungal plant diseases in horticulture or agriculture. Besides, empty xylan‐based nanocarriers stimulated the growth of fungal mycelium, which indicated the degradation of xylan in the presence of the fungi, and underlined the degradation as a trigger to release a loaded agrochemical. This first example of crosslinked xylan‐based nanocarriers expands the library of biodegradable and biobased nanocarriers for agrochemical release and might play a crucial role for future formulations in plant protection.

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Section: Resultsmentioning

confidence: 99%

Fungicide‐loaded and biodegradable xylan‐based nanocarriers

et al. 2020

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“…In our experiments, the maximum values appear when the initial mole fractions of ethanol/isopropanol of the binary solvent are equal to 0.2. This phenomenon has been discovered and explained as cosolvency in previous studies . First, as the mole fraction of ethanol/isopropanol increases, the interactions between solvents and PE become stronger before reaching maximum solubility, thereby enhancing the dissolution of PE.…”

Section: Resultsmentioning

confidence: 80%

“…This phenomenon has been discovered and explained as cosolvency in previous studies. 25 First, as the mole fraction of ethanol/isopropanol increases, the interactions between solvents and PE become stronger before reaching maximum solubility, thereby enhancing the dissolution of PE. Then, as the mole fraction of ethanol/isopropanol increases further, the interactions between the solvent and the solute decrease; thus, the solubility of PE decreases (Table 5 and Figure 6).…”

Section: Cnibs/r-k Equationmentioning

confidence: 99%

Solubility Measurement and Data Correlation of Pentaerythritol in Four Binary Solvent Systems at Temperatures from 283.15 to 323.15 K

et al. 2021

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The solubility of pentaerythritol (PE) in four binary solvents (methanol + water, ethanol + water, isopropanol + water, acetonitrile + water) is determined using the gravimetric method at temperatures ranging from 283.15 to 323.15 K under 0.1 MPa. The experimental results demonstrate that the solubility of PE increases with the increase of temperature in all four binary solvent systems. And water has a relatively positive effect on the solubility of PE in all four binary solvents. However, the solubility of PE in ethanol + water and isopropanol + water mixtures first increases with the increase of the ethanol/isopropanol fraction and then decreases when the temperature exceeds 303.15 and 288.15 K, respectively. And the solubility reaches the maximum when the initial mole fractions of ethanol/isopropanol of the binary solvent are 0.2. Besides, experimental solubility is fitted with three thermodynamic models including the modified Apelblat model, λh model, and CNIBS/R-K model, and all of the average relative deviation (ARDs) are less than 4%, indicating good accordance with the experimental results. In addition, among the three thermodynamic models, the CNIBS/R-K model has the best fitting performance, in which all of the ARDs are less than 1.7%.

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“…The mole fraction solubility of L-Phe(x) with temperature (T) was fitted by the modified Apelblat [24][25][26][27] and λh Equation 3 [28], described by Equations (2) and 3.…”

Section: Correlation Of Solubility With Temperaturementioning

confidence: 99%

The Methods to Crystallize Anhydrous L-Phenylalanine from Methanol-Water Solution

Cao

Ben³

et al. 2020

Crystals

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In this paper, the transformation water activity of L-Phenylalanine (L-Phe) in a methanol-water solution at a different temperature was measured by the ternary diagram. The influence of water activity on the transformation temperature and on the transformation rate was investigated. The solubility of the metastable form of different water activities was estimated based on the thermodynamic equilibrium and the results showed that the anhydrous L-Phe can be synthesized at room temperature by decreasing water activity, the transformation rate from monohydrate to anhydrate was enhanced with the increase of water activity. The predicted solubility value is in good agreement with the experimentally obtained. Meanwhile, tailor-made additives were applied into the system as to investigate the transformation behavior of L-Phe. Their mechanism was proposed based on the Langmuir model fitting. The result manifested that the addition of L-Trp/L-His amino acid in the L-Phe solution decelerated the transformation rate. When the concentration of L-Trp amino acid reached 0.7 × 10−4 mol/mL, the transformation behavior of L-Phe can be fully impeded, and the transformation behavior can be partially inhibited with the addition of L-Trp at 313.15 K or with the addition of L-His at 283.15 K/313.15 K.

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Determination and correlation of solubility and thermodynamic properties of pyraclostrobin in pure and binary solvents

Cited by 56 publications

References 26 publications

Fungicide‐loaded and biodegradable xylan‐based nanocarriers

Fungicide‐loaded and biodegradable xylan‐based nanocarriers

Solubility Measurement and Data Correlation of Pentaerythritol in Four Binary Solvent Systems at Temperatures from 283.15 to 323.15 K

The Methods to Crystallize Anhydrous L-Phenylalanine from Methanol-Water Solution

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