The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Jie Wu - One of the best experts on this subject based on the ideXlab platform.
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recent advances in sulfonylation reactions using potassium Sodium Metabisulfite
Chemical Communications, 2020Co-Authors: Shengqing Ye, Min Yang, Jie WuAbstract:Recently, sulfonylation reactions using potassium/Sodium Metabisulfite as the sulfur dioxide surrogate have been developed rapidly. In most cases, the transformations go through radical processes with the insertion of sulfur dioxide under mild conditions. Additionally, transition metal catalysis is applied in the reactions for the synthesis of sulfonyl-containing compounds. Among the approaches, photoinduced conversions under visible light or ultraviolet irradiation are also involved. In this updated report, the insertion of sulfur dioxide from potassium Metabisulfite or Sodium Metabisulfite is summarized.
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Recent advances in sulfonylation reactions using potassium/Sodium Metabisulfite.
Chemical Communications, 2020Co-Authors: Shengqing Ye, Min Yang, Jie WuAbstract:Recently, sulfonylation reactions using potassium/Sodium Metabisulfite as the sulfur dioxide surrogate have been developed rapidly. In most cases, the transformations go through radical processes with the insertion of sulfur dioxide under mild conditions. Additionally, transition metal catalysis is applied in the reactions for the synthesis of sulfonyl-containing compounds. Among the approaches, photoinduced conversions under visible light or ultraviolet irradiation are also involved. In this updated report, the insertion of sulfur dioxide from potassium Metabisulfite or Sodium Metabisulfite is summarized.
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an unexpected reaction of aryldiazonium tetrafluoroborates Sodium Metabisulfite and thiourea under photoinduced conditions
Organic chemistry frontiers, 2019Co-Authors: Xinxing Gong, Jie Wu, Xiaofang Li, Shengqing YeAbstract:A photoinduced synthesis of S-aryl thiosulfonates through a three-component reaction of aryldiazonium tetrafluoroborates, Sodium Metabisulfite, and thiourea is achieved. The reaction scope generality with a range of aryldiazonium tetrafluoroborates is demonstrated. In this transformation, a radical coupling pathway is proposed with the insertion of sulfur dioxide in the presence of a photocatalyst under visible light irradiation. The organic sulfur motifs in S-aryl thiosulfonates originate from the convenient, cheap, and easily available thiourea and Sodium Metabisulfite.
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synthesis of 3 methylsulfonyl benzo b thiophenes from methyl 2 alkynylphenyl sulfanes and Sodium Metabisulfite via a radical relay strategy
Organic Letters, 2019Co-Authors: Shengqing Ye, Jie Wu, Xinxing Gong, Mengjiao WangAbstract:A radical relay strategy for the generation of 3-(methylsulfonyl)benzo[b]thiophenes through a reaction of methyl(2-alkynylphenyl)sulfanes with Sodium Metabisulfite in the presence of a photocatalyst under visible light irradiation is developed. This photoinduced sulfonylation proceeds efficiently under mild conditions by using a catalytic amount of Sodium methylsulfinate as an initiator. During the reaction process, the methyl radical generated in situ is the key intermediate, which undergoes a radical relay with the combination of sulfur dioxide to afford methylsulfonyl-containing compounds.
Wan Sup Kwak - One of the best experts on this subject based on the ideXlab platform.
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long term anaerobic conservation of fruit and vegetable discards without or with moisture adjustment after aerobic preservation with Sodium Metabisulfite
Waste Management, 2019Co-Authors: Farhad Ahmadi, Youngkyoon Oh, Keunkyu Park, Wan Sup KwakAbstract:Abstract The high moisture and soluble carbohydrates contents of fruit and vegetable discards accelerate putrefaction; thus, the immediate use of preservatives is necessary to prevent their decay and allow further use. Two series of experiments were performed to evaluate the conservation stability of fruit and vegetable discards through ensiling. Fruit and vegetable discards were not treated or treated with 6 g Sodium Metabisulfite/kg fruit and vegetable discards and aerobically challenged for 7 days. In Experiment 1, Sodium Metabisulfite-treated fruit and vegetable discards were ensiled alone as high-moisture biomass. Silage fermentation was not effective in preventing the deterioration and mold control, which resulted in the rapid depletion of sugars and dry matter loss in control silage (without Sodium Metabisulfite). Conversely, the low number of undesirable microorganisms resulted in the negligible loss of nutrients in the Sodium Metabisulfite-treated silage. In Experiment 2, Sodium Metabisulfite-treated fruit and vegetable discards were co-ensiled with dry by-product feeds at varying proportions to provide Sodium Metabisulfite loads of 1.6, 2.4, 3.2, and 4 g/kg biomass. Based on microbiological, nutrient composition, and organoleptic evaluations, the Sodium Metabisulfite load of 3.2 g/kg biomass provided the most desirable conservation parameters. This study provides a clean route to the safe utilization of the discards for a prolonged period, with negligible dry matter and nutrient loss.
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preservation of fruit and vegetable discards with Sodium Metabisulfite
Journal of Environmental Management, 2018Co-Authors: Farhad Ahmadi, Y K Oh, K K Park, Wan Sup KwakAbstract:Abstract Two series of experiments were performed to investigate the aerobic preservation of fruit and vegetable discards (FVD) using Sodium Metabisulfite (SMB). In Exp. 1, Metabisulfite was applied at 0, 2, 4, 6, and 8 g/kg FVD for 0, 3, 6, 9, and 12 d. Metabisulfite treatment at 6 and 8 g/kg FVD was highly effective in controlling putrefaction and preserving the nutrient components for 6 and 9 d, respectively. In the pilot-scale experiment (Exp. 2), SMB was applied at 0 and 8 g/kg FVD in a 600-L bucket for 0, 6, and 9 d in an outdoor environment. The SMB treatment was highly effective in maintaining the integrity and freshness of FVD, suppressing microbial proliferation, and preserving the nutrient constituents. Under the conditions of this study, SMB effectively preserved FVD in an aerobic environment, enabling their more efficient long-term recycling through livestock feed or development of value-added products.
Shengqing Ye - One of the best experts on this subject based on the ideXlab platform.
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recent advances in sulfonylation reactions using potassium Sodium Metabisulfite
Chemical Communications, 2020Co-Authors: Shengqing Ye, Min Yang, Jie WuAbstract:Recently, sulfonylation reactions using potassium/Sodium Metabisulfite as the sulfur dioxide surrogate have been developed rapidly. In most cases, the transformations go through radical processes with the insertion of sulfur dioxide under mild conditions. Additionally, transition metal catalysis is applied in the reactions for the synthesis of sulfonyl-containing compounds. Among the approaches, photoinduced conversions under visible light or ultraviolet irradiation are also involved. In this updated report, the insertion of sulfur dioxide from potassium Metabisulfite or Sodium Metabisulfite is summarized.
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Recent advances in sulfonylation reactions using potassium/Sodium Metabisulfite.
Chemical Communications, 2020Co-Authors: Shengqing Ye, Min Yang, Jie WuAbstract:Recently, sulfonylation reactions using potassium/Sodium Metabisulfite as the sulfur dioxide surrogate have been developed rapidly. In most cases, the transformations go through radical processes with the insertion of sulfur dioxide under mild conditions. Additionally, transition metal catalysis is applied in the reactions for the synthesis of sulfonyl-containing compounds. Among the approaches, photoinduced conversions under visible light or ultraviolet irradiation are also involved. In this updated report, the insertion of sulfur dioxide from potassium Metabisulfite or Sodium Metabisulfite is summarized.
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an unexpected reaction of aryldiazonium tetrafluoroborates Sodium Metabisulfite and thiourea under photoinduced conditions
Organic chemistry frontiers, 2019Co-Authors: Xinxing Gong, Jie Wu, Xiaofang Li, Shengqing YeAbstract:A photoinduced synthesis of S-aryl thiosulfonates through a three-component reaction of aryldiazonium tetrafluoroborates, Sodium Metabisulfite, and thiourea is achieved. The reaction scope generality with a range of aryldiazonium tetrafluoroborates is demonstrated. In this transformation, a radical coupling pathway is proposed with the insertion of sulfur dioxide in the presence of a photocatalyst under visible light irradiation. The organic sulfur motifs in S-aryl thiosulfonates originate from the convenient, cheap, and easily available thiourea and Sodium Metabisulfite.
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synthesis of 3 methylsulfonyl benzo b thiophenes from methyl 2 alkynylphenyl sulfanes and Sodium Metabisulfite via a radical relay strategy
Organic Letters, 2019Co-Authors: Shengqing Ye, Jie Wu, Xinxing Gong, Mengjiao WangAbstract:A radical relay strategy for the generation of 3-(methylsulfonyl)benzo[b]thiophenes through a reaction of methyl(2-alkynylphenyl)sulfanes with Sodium Metabisulfite in the presence of a photocatalyst under visible light irradiation is developed. This photoinduced sulfonylation proceeds efficiently under mild conditions by using a catalytic amount of Sodium methylsulfinate as an initiator. During the reaction process, the methyl radical generated in situ is the key intermediate, which undergoes a radical relay with the combination of sulfur dioxide to afford methylsulfonyl-containing compounds.
Ali Rashidianirashidabadi - One of the best experts on this subject based on the ideXlab platform.
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curcumin can prevent the changes in cerebellar structure and function induced by Sodium Metabisulfite in rat
Experimental Neurobiology, 2013Co-Authors: Ali Noorafshan, Aghdas Poostpasand, Mohammad Amin Abdollahifar, Ali Rashidianirashidabadi, Saied Karbalaydoust, Reza AsadigolshanAbstract:Sulfites are used as anti-microbial and anti-oxidant agents in the food and pharmaceutical industries. Curcumin, a flavonoid, is an Asian spice that shows neuroprotective activities. The current study aimed to stereologically assess the rats' cerebellar cortex and rotarod performance following sulfite exposure and determine the possible neuroprotective potential of curcumin. The rats were divided into five groups: distilled water, olive oil, curcumin (100 mg/kg/day), Sodium Metabisulfite (25 mg/kg/day), and Sodium Metabisulfite+curcumin. At 56 days after treatment, rotarod performance was tested, and then the cerebellum was removed for stereological analysis. The study results revealed 31%, 36%, 19% and 24% decrease in the total volume of the cerebellum, cortex, the total number of the Purkinje cells and length of the nerve fibers in the cortex per Purkinje, respectively in the Sodium Metabisulfite-treated rats compared to the distilled water group (p<0.01). The pre-trained animals on the rotarod apparatus were tested first on the fixed speed rotarod protocol followed by the accelerating rotarod protocol two days later. The results showed a significant decrease in the latency to fall in both test in sulfite-treated rats. The sulfite effects on the structural parameters and rotarod performance were significantly protected by the concomitant curcumin treatment (p<0.001). Sulfite can induce structural and functional changes in the rats' cerebellum and concomitant curcumin prescription plays a neuroprotective role.
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curcumin the main part of turmeric prevents learning and memory changes induced by Sodium Metabisulfite a preservative agent in rats
Experimental Neurobiology, 2013Co-Authors: Ali Noorafshan, Mohammad Amin Abdollahifar, Saied Karbalaydoust, Reza Asadigolshan, Ali RashidianirashidabadiAbstract:Sodium Metabisulfite is used as a disinfectant, antioxidant, and preservative agent in the food, beverage, and drug industries. Neurons are highly sensitive to sulfite toxicity. Curcumin is the main part of turmeric and has neuroprotective effects on a variety of nervous system damages. The present study aimed to investigate the possible protective role of curcumin in learning and memory after exposure to sulfite in rats. The rats were divided into five groups receiving distilled water (solvent of the sulfite), olive oil (solvent of the curcumin), Sodium Metabisulfite (25 mg/kg/day), curcumin (100 mg/kg/day), and sulfite + curcumin. All the animals received daily gavages for 8 weeks. At the end of the 8th week, learning and memory were assessed in a partially-baited eight arm radial maze. The animals treated with sulfite showed fewer correct choices and more reference and working memory errors during the learning phase, at the end of the learning phase, and during the retention testing (p<0.001). The study results demonstrated that sulfite-exposure was associated with impaired learning and memory in rats. Adding curcumin to the rat nutrition plays a protective role in learning and memory after exposure to sulfite.
Ali Noorafshan - One of the best experts on this subject based on the ideXlab platform.
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Curcumin prevents the structural changes induced in the rats' deep cerebellar nuclei by Sodium Metabisulfite, a preservative agent.
Asian Pacific journal of tropical medicine, 2020Co-Authors: Mohammad Hassan Karimfar, Ali Noorafshan, Ali Rashidiani-rashidabadi, Aghdas Poostpasand, Mohammad Amin Abdollahifar, Reza Asadi-golshan, Saied Karbalay-doustAbstract:To evaluate the the possible neurotoxic effects of sulfite and the protective potential of curcumin on the deep cerebellar nuclei using stereological methods. The rats were randomly divided into five experimental groups (n=6): Group I: distilled water, Group II: Olive oil, Group III: Curcumin (100 mg/kg/day), Group IV: Sodium Metabisulfite (25 mg/kg/day), and Group V: Sodium Metabisulfite+curcumin. At the end of 56 d, the right cerebellar hemispheres were removed and assigned to stereological studies. The total volume and total neuron number of deep cerebellar nuclei were assessed using Cavalieri and optical disector methods, respectively. The data showed ∼20% and ∼16% decrease was respectively observed in the total volume and the total neuron number of the deep cerebellar nuclei of the sulfite-treated rats in comparison to the distilled water group (P<0.04). However, no significant change was observed in the total volume and neuronal number of the deep cerebellar nuclei in sulfite+curcumin-treated rats and curcumin played a protective role against sulfite. Curcumin or its vehicle (olive oil) did not induce any significant changes. Curcumin, the main part of the turmeric, could prevent the structural changes induced in the deep cerebellar nuclei by Sodium Metabisulfite, a preservative agent, in rats. Copyright © 2014 Hainan Medical College. Published by Elsevier B.V. All rights reserved.
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Curcumin can prevent the changes in cerebellar structure and function induced by Sodium Metabisulfite in rat.
Experimental Neurobiology, 2013Co-Authors: Ali Noorafshan, Ali Rashidiani-rashidabadi, Saied Karbalay-doust, Aghdas Poostpasand, Mohammad Amin Abdollahifar, Reza Asadi-golshanAbstract:Sulfites are used as anti-microbial and anti-oxidant agents in the food and pharmaceutical industries. Curcumin, a flavonoid, is an Asian spice that shows neuroprotective activities. The current study aimed to stereologically assess the rats' cerebellar cortex and rotarod performance following sulfite exposure and determine the possible neuroprotective potential of curcumin. The rats were divided into five groups: distilled water, olive oil, curcumin (100 mg/kg/day), Sodium Metabisulfite (25 mg/kg/day), and Sodium Metabisulfite+curcumin. At 56 days after treatment, rotarod performance was tested, and then the cerebellum was removed for stereological analysis. The study results revealed 31%, 36%, 19% and 24% decrease in the total volume of the cerebellum, cortex, the total number of the Purkinje cells and length of the nerve fibers in the cortex per Purkinje, respectively in the Sodium Metabisulfite-treated rats compared to the distilled water group (p
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curcumin can prevent the changes in cerebellar structure and function induced by Sodium Metabisulfite in rat
Experimental Neurobiology, 2013Co-Authors: Ali Noorafshan, Aghdas Poostpasand, Mohammad Amin Abdollahifar, Ali Rashidianirashidabadi, Saied Karbalaydoust, Reza AsadigolshanAbstract:Sulfites are used as anti-microbial and anti-oxidant agents in the food and pharmaceutical industries. Curcumin, a flavonoid, is an Asian spice that shows neuroprotective activities. The current study aimed to stereologically assess the rats' cerebellar cortex and rotarod performance following sulfite exposure and determine the possible neuroprotective potential of curcumin. The rats were divided into five groups: distilled water, olive oil, curcumin (100 mg/kg/day), Sodium Metabisulfite (25 mg/kg/day), and Sodium Metabisulfite+curcumin. At 56 days after treatment, rotarod performance was tested, and then the cerebellum was removed for stereological analysis. The study results revealed 31%, 36%, 19% and 24% decrease in the total volume of the cerebellum, cortex, the total number of the Purkinje cells and length of the nerve fibers in the cortex per Purkinje, respectively in the Sodium Metabisulfite-treated rats compared to the distilled water group (p<0.01). The pre-trained animals on the rotarod apparatus were tested first on the fixed speed rotarod protocol followed by the accelerating rotarod protocol two days later. The results showed a significant decrease in the latency to fall in both test in sulfite-treated rats. The sulfite effects on the structural parameters and rotarod performance were significantly protected by the concomitant curcumin treatment (p<0.001). Sulfite can induce structural and functional changes in the rats' cerebellum and concomitant curcumin prescription plays a neuroprotective role.
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Curcumin, the Main Part of Turmeric, Prevents Learning and Memory Changes Induced by Sodium Metabisulfite, a Preservative Agent, in Rats
Experimental Neurobiology, 2013Co-Authors: Ali Noorafshan, Saied Karbalay-doust, Mohammad Amin Abdollahifar, Reza Asadi-golshan, Ali Rashidiani-rashidabadiAbstract:Sodium Metabisulfite is used as a disinfectant, antioxidant, and preservative agent in the food, beverage, and drug industries. Neurons are highly sensitive to sulfite toxicity. Curcumin is the main part of turmeric and has neuroprotective effects on a variety of nervous system damages. The present study aimed to investigate the possible protective role of curcumin in learning and memory after exposure to sulfite in rats. The rats were divided into five groups receiving distilled water (solvent of the sulfite), olive oil (solvent of the curcumin), Sodium Metabisulfite (25 mg/kg/day), curcumin (100 mg/kg/day), and sulfite + curcumin. All the animals received daily gavages for 8 weeks. At the end of the 8th week, learning and memory were assessed in a partially-baited eight arm radial maze. The animals treated with sulfite showed fewer correct choices and more reference and working memory errors during the learning phase, at the end of the learning phase, and during the retention testing (p
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curcumin the main part of turmeric prevents learning and memory changes induced by Sodium Metabisulfite a preservative agent in rats
Experimental Neurobiology, 2013Co-Authors: Ali Noorafshan, Mohammad Amin Abdollahifar, Saied Karbalaydoust, Reza Asadigolshan, Ali RashidianirashidabadiAbstract:Sodium Metabisulfite is used as a disinfectant, antioxidant, and preservative agent in the food, beverage, and drug industries. Neurons are highly sensitive to sulfite toxicity. Curcumin is the main part of turmeric and has neuroprotective effects on a variety of nervous system damages. The present study aimed to investigate the possible protective role of curcumin in learning and memory after exposure to sulfite in rats. The rats were divided into five groups receiving distilled water (solvent of the sulfite), olive oil (solvent of the curcumin), Sodium Metabisulfite (25 mg/kg/day), curcumin (100 mg/kg/day), and sulfite + curcumin. All the animals received daily gavages for 8 weeks. At the end of the 8th week, learning and memory were assessed in a partially-baited eight arm radial maze. The animals treated with sulfite showed fewer correct choices and more reference and working memory errors during the learning phase, at the end of the learning phase, and during the retention testing (p<0.001). The study results demonstrated that sulfite-exposure was associated with impaired learning and memory in rats. Adding curcumin to the rat nutrition plays a protective role in learning and memory after exposure to sulfite.