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During the past decade, deep eutectic solvents (DESs), emerging as green, versatile and adjustable alternatives to traditional solvents, have attracted intensive interests and immense research in various research fields. Especially DESs show quite a remarkable potential dissolving capability, due to their ability to donate as well as accept protons and electrons. A thorough and deep understanding of the microstructure, interactions and dissolving mechanism within DESs plays a key role in acquiring a task-specific DES. Quantum chemistry (QC) calculations provide structure-property-function relationship based on the molecular description and make up for the limitations of the current experimental techniques, showing promises for DESs screening and design. This paper summarizes the current research involving QC calculations and combined experiments, on investigating the structure, physicochemical properties and dissolving capability of DESs from the macroscopic and microcosmic perspective. This paper highlights and discusses the dissolving mechanism of various compounds in DESs, covering the recent successes in applying QC calculations to select the appropriate DESs as dissolving media. Furthermore, a brief analysis of perspectives and challenges for the future research in this field is presented. It is expected that this paper will inspire the future development of DESs from synthesis design to various designated applications. This review summarizes the current researches involved QC calculations combined experiments, on investigating the microstructure-interactions-physicochemical properties relationship and dissolving behaviour in DESs from the macroscopic and microcosmic perspective. On top of that, the prediction of properties and dissolving ability of DESs through COSMO-RS and Machine Learning Methods are discussed, which have not been thoroughly and intensively researched, but show great potential. Finally, a brief analysis of perspectives and challenges for the future research in this field is presented. [ABSTRACT FROM AUTHOR]

A field experiment was carried out during the spring season 2016 in a greenhouse affiliated to the Directorate for Plant Protection - Ministry of Agriculture. The objective was to study the effect of phosphor levels and the concentration of sulfuric acid on some of the features of growth of Cucumis sativus L. The experiment was arranged according to the Randomized Complete Block Design (RCBD) in factorial experiment that included four levels of phosphor (0, 25, 50 and 75) kg Pha-1 and three concentrations of sulfuric acid with irrigation water (0, 0.025 N and 0.05 N) symbolized with three replicates. The results showed the superiority of the level of 75 kg P ha-1 and gave the highest values of the available phosphor, nitrogen and potassium in soil 19.54 mg kg -1 and 46 mg kg-1 and 247.2 mg kg-1 respectively. The addition of features of the dry weight for the shoot system is 480.4 gm.plant-1 and the dry weight of the root system is 24.93 gm. plant-1 and the concentration of phosphor in plant is 0.40% and the yield of one plant is 4.88 kg. plant-1 . Also, concentration 0.05N of sulphuric acid is excelled in the concentration of phosphor 18.22 mg kg -1, nitrogen 45.4 mg kg-1 potassium 255.2 mg kg-1 available in the soil and the dry weight of the shoot system 486.4 gm. plant-1 and the dry weight root system 21.0 gm. plant-1 and concentration of phosphor in plant 0.39% and the yield of one plant 4.478 kg plant-1. The interaction treatment has superseded in treatment 75 kg plant-1 + concentration 0.05 N, which gave the highest value 23.20 mg kg-1, 50 mg kg-1 and 265.0 mg kg-1 and 582.3 gm. plant-1 and 26.74 gm. plant-1 and 0.48% and 5.64 kg plant-1 for the phosphor, nitrogen and potassium in plant, dry weight of the root system and shoot system and concentration of phosphor and one plant yield respectively . [ABSTRACT FROM AUTHOR]