The Experts below are selected from a list of 8646 Experts worldwide ranked by ideXlab platform
Jitai Li - One of the best experts on this subject based on the ideXlab platform.
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PINACOL COUPLING OF AROMATIC ALDEHYDES USING ALUMINIUM UNDER Ultrasound Irradiation
Synthetic Communications, 2020Co-Authors: Yan-jiang Bian, Jitai Li, Tong‐shuang LiAbstract:ABSTRACT The pinacol coupling reaction of aromatic aldehydes and ketones was carried out in 26–98% yield with Al in aqueous NaOH–MeOH under Ultrasound Irradiation at r.t. within 30 min.
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Synthesis of glycoluril catalyzed by potassium hydroxide under Ultrasound Irradiation
Ultrasonics Sonochemistry, 2009Co-Authors: Jitai LiAbstract:Abstract Synthesis of the glycolurils catalyzed by potassium hydroxide was carried out in 17–75% yield at 40 °C in EtOH under Ultrasound Irradiation. Compared to the method using stirring, the main advantage of the present procedure is milder conditions and shorter reaction time.
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One-pot synthesis of benzylacetamide from oxime under Ultrasound Irradiation
Ultrasonics Sonochemistry, 2008Co-Authors: Jitai Li, Xian-tao Meng, Xin-li ZhaiAbstract:Abstract One-pot synthesis of benzylacetamide from oxime can be carried out in 80–95% yield at 35–40 °C under Ultrasound Irradiation. This method provided several advantages such as simple work-up procedure, shorter reaction time and higher yield.
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An efficient oxidation of benzoins to benzils by ACC/silica gel under Ultrasound Irradiation.
Ultrasonics Sonochemistry, 2008Co-Authors: Jitai Li, Wen-feng WangAbstract:Abstract The oxidation of benzoins to the corresponding benzils was carried out in CH2Cl2 by ACC/silica gel in excellent yields within short time under Ultrasound Irradiation.
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Oxidative cleavage of hydrobenzoin by ACC/silica gel under Ultrasound Irradiation.
Ultrasonics Sonochemistry, 2008Co-Authors: Jitai LiAbstract:A mild and efficient method has been developed using Ultrasound Irradiation for oxidative cleavage of hydrobenzoin with ACC/silica gel in dichloromethane. A high yield of 72-99% has been obtained for the oxidation of a series of hydrobenzoins into aromatic aldehydes at room temperature.
Mei Li - One of the best experts on this subject based on the ideXlab platform.
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Ultrasound Irradiation prepare sulfur free and lower exfoliate temperature expandable graphite
Materials Letters, 2008Co-Authors: Jing Li, Jihui Li, Mei LiAbstract:The article reported a new way to prepare sulfur-free and lower exfoliate-temperature expandable graphite with Ultrasound Irradiation. Flake graphite mixture was used as raw material, sulfur-free inorganic and organic solvents were used as ultrasonic solvents. After Ultrasound Irradiation and wash, the expandable graphite was expanded at 350 °C to obtain sulfur-free expanded graphite. The process is the same as the preparation of sulfur-contain and high exfoliate-temperature expandable graphite with Ultrasound Irradiation. X-ray diffraction patterns were used to analyze the structure and confirm that the expandable graphite had been prepared. Scanning electron microscope images showed the structure of expandable graphite and the existence of expanded graphite.
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Preparation of expandable graphite with Ultrasound Irradiation
Materials Letters, 2007Co-Authors: Jihui Li, Jing Li, Mei LiAbstract:Abstract This article reports a new way to prepare expandable graphite with Ultrasound Irradiation. Flake graphite mixture and ultrasonic solvent were placed into a flask in the ultrasonic cleaning bath (nominal power of 500 W and 250 W) at room temperature. Ultrasonic time kept 60 min. After Ultrasound Irradiation, the expandable graphite was expanded at 900 °C to obtain the expanded graphite. The process of Ultrasound Irradiation is different from both electrochemistry intercalation and chemistry oxidation intercalation, but the properties of expandable graphite are similar. X-ray diffraction patterns are used to analyze the structure and confirm that the expandable graphite has been prepared. Scanning electron microscope images show the structure of expandable graphite and the existence of expanded graphite.
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Preparation of expandable graphite with Ultrasound Irradiation
Materials Letters, 2007Co-Authors: Jihui Li, Jing Li, Mei LiAbstract:This article reports a new way to prepare expandable graphite with Ultrasound Irradiation. Flake graphite mixture and ultrasonic solvent were placed into a flask in the ultrasonic cleaning bath (nominal power of 500 W and 250 W) at room temperature. Ultrasonic time kept 60 min. After Ultrasound Irradiation, the expandable graphite was expanded at 900 °C to obtain the expanded graphite. The process of Ultrasound Irradiation is different from both electrochemistry intercalation and chemistry oxidation intercalation, but the properties of expandable graphite are similar. X-ray diffraction patterns are used to analyze the structure and confirm that the expandable graphite has been prepared. Scanning electron microscope images show the structure of expandable graphite and the existence of expanded graphite. © 2007 Elsevier B.V. All rights reserved.
Bao Guo Xu - One of the best experts on this subject based on the ideXlab platform.
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Effect of Ultrasound Irradiation on some freezing parameters of Ultrasound-assisted immersion freezing of strawberries
International Journal of Refrigeration-revue Internationale Du Froid, 2014Co-Authors: Xin Feng Cheng, Min Zhang, Benu Adhikari, Nahidul Islam, Bao Guo XuAbstract:Abstract In this study, the effect of Ultrasound Irradiation temperature and Ultrasound intensity on the freezing and nucleation in strawberry samples was studied. The application of Ultrasound Irradiation at different temperatures was able to induce nucleation at lower degree of supercooling compared to the control samples. The achieved degree of supercooling in the Ultrasound irradiated strawberries was linearly correlated to the Ultrasound Irradiation temperature. At the Ultrasound Irradiation temperature of −1.6 °C, the characteristic freezing time (CFT) was significantly shorter than that in the control sample (p
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Effect of Ultrasound Irradiation on some freezing parameters of Ultrasound-assisted immersion freezing of strawberries
International Journal of Refrigeration, 2014Co-Authors: Xin Feng Cheng, Md Nahidul Islam, Basudam Adhikari, Min Zhang, Bao Guo XuAbstract:In this study, the effect of Ultrasound Irradiation temperature and Ultrasound intensity on the freezing and nucleation in strawberry samples was studied. The application of Ultrasound Irradiation at different temperatures was able to induce nucleation at lower degree of supercooling compared to the control samples. The achieved degree of supercooling in the Ultrasound irradiated strawberries was linearly correlated to the Ultrasound Irradiation temperature. At the Ultrasound Irradiation temperature of -1.6 ??C, the characteristic freezing time (CFT) was significantly shorter than that in the control sample (p < 0.05). The application of Ultrasound at higher intensities was found to effectively shorten the CFT. The degree of supercooling in Ultrasound irradiated samples was not linearly correlated to Ultrasound intensity. In conclusion, the combination of Ultrasound Irradiation temperature and intensity can be effective in controlling nucleation and freezing processes of perishable fruits such as strawberry.??2014 Elsevier Ltd and IIR. All rights reserved.
Tongshuang Li - One of the best experts on this subject based on the ideXlab platform.
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synthesis of oximes under Ultrasound Irradiation
Ultrasonics Sonochemistry, 2006Co-Authors: Jitai Li, Xiaoliang Li, Tongshuang LiAbstract:The condensation of aldehydes and ketones with hydroxylamine hydrochloride results oximes in 50.7-98.7% yields in EtOH under Ultrasound Irradiation. Compared with conventional methods, the main advantages of the present procedure are milder conditions, shorter reaction time and higher yields.
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an efficient synthesis of 3 4 dihydropyrimidin 2 ones catalyzed by nh2so3h under Ultrasound Irradiation
Ultrasonics Sonochemistry, 2003Co-Authors: Jitai Li, Jinhui Yang, Tongshuang LiAbstract:Abstract The condensation of aldehydes, β-keto esters and urea catalyzed by NH 2 SO 3 H in ethanol results dihydropyrimidinones in high yields under Ultrasound Irradiation.
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improved synthesis of chalcones under Ultrasound Irradiation
Ultrasonics Sonochemistry, 2002Co-Authors: Jitai Li, Wenzhi Yang, Shuxiang Wang, Shenghui Li, Tongshuang LiAbstract:Abstract Claisen–Schmidt condensation of acetophenone with aromatic aldehydes catalyzed by pulverized KOH and KF–Al2O3 results chalcones in 52–97% and 83–98% yields respectively in alcoholic solvent under Ultrasound Irradiation.
Xin Feng Cheng - One of the best experts on this subject based on the ideXlab platform.
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Effect of Ultrasound Irradiation on some freezing parameters of Ultrasound-assisted immersion freezing of strawberries
International Journal of Refrigeration-revue Internationale Du Froid, 2014Co-Authors: Xin Feng Cheng, Min Zhang, Benu Adhikari, Nahidul Islam, Bao Guo XuAbstract:Abstract In this study, the effect of Ultrasound Irradiation temperature and Ultrasound intensity on the freezing and nucleation in strawberry samples was studied. The application of Ultrasound Irradiation at different temperatures was able to induce nucleation at lower degree of supercooling compared to the control samples. The achieved degree of supercooling in the Ultrasound irradiated strawberries was linearly correlated to the Ultrasound Irradiation temperature. At the Ultrasound Irradiation temperature of −1.6 °C, the characteristic freezing time (CFT) was significantly shorter than that in the control sample (p
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Effect of Ultrasound Irradiation on some freezing parameters of Ultrasound-assisted immersion freezing of strawberries
International Journal of Refrigeration, 2014Co-Authors: Xin Feng Cheng, Md Nahidul Islam, Basudam Adhikari, Min Zhang, Bao Guo XuAbstract:In this study, the effect of Ultrasound Irradiation temperature and Ultrasound intensity on the freezing and nucleation in strawberry samples was studied. The application of Ultrasound Irradiation at different temperatures was able to induce nucleation at lower degree of supercooling compared to the control samples. The achieved degree of supercooling in the Ultrasound irradiated strawberries was linearly correlated to the Ultrasound Irradiation temperature. At the Ultrasound Irradiation temperature of -1.6 ??C, the characteristic freezing time (CFT) was significantly shorter than that in the control sample (p < 0.05). The application of Ultrasound at higher intensities was found to effectively shorten the CFT. The degree of supercooling in Ultrasound irradiated samples was not linearly correlated to Ultrasound intensity. In conclusion, the combination of Ultrasound Irradiation temperature and intensity can be effective in controlling nucleation and freezing processes of perishable fruits such as strawberry.??2014 Elsevier Ltd and IIR. All rights reserved.
