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A New Acetophenone Trimer From Roots of Euphorbia ebracteolata 大戟根中一个新的苯乙酮三聚体
The Open Chemical Engineering Journal Pub Date : 2015-07-31 DOI: 10.2174/1874123101509010067
Geng Di, Xuan Ma, L. Weng, Yi Litao, Y. Han, Xin Yang
{"title":"A New Acetophenone Trimer From Roots of Euphorbia ebracteolata","authors":"Geng Di, Xuan Ma, L. Weng, Yi Litao, Y. Han, Xin Yang","doi":"10.2174/1874123101509010067","DOIUrl":"https://doi.org/10.2174/1874123101509010067","url":null,"abstract":"A new acetophenone trimer, named ebracteolatain C, along with two known diterpenoids was isolated from Euphorbia ebtacteolata. The structure of the compound 1 was elucidated as 1-(3, 5-bis-(3-acetyl-2, 6-dihydroxy-4- methoxy-benzyl)-4, 6-dihydroxy-2-methoxy-phenyl)-ethanone on basis of spectroscopic methods.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"40 1","pages":"67-70"},"PeriodicalIF":0.0,"publicationDate":"2015-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85745788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Using Fenton Oxidation Method to Advanced Treatment of Landfill Leachate Fenton氧化法深度处理垃圾渗滤液
The Open Chemical Engineering Journal Pub Date : 2015-07-31 DOI: 10.2174/1874123101509010058
Gao Yanjiao, Huang Runzhu, Song Tiehong
{"title":"Using Fenton Oxidation Method to Advanced Treatment of Landfill Leachate","authors":"Gao Yanjiao, Huang Runzhu, Song Tiehong","doi":"10.2174/1874123101509010058","DOIUrl":"https://doi.org/10.2174/1874123101509010058","url":null,"abstract":"Hydrogen peroxide and ferrous sulfate were used to advanced treatment of landfill leachate effluent from biochemical tanks. Some influences on removing COD and chroma including the pH value of solution, the dosage of ferrous sulfate, the dosage of hydrogen peroxide and reaction time were investigated. The test results showed that for removal of COD and chroma the optimal pH was 3.0, the best ferrous sulfate and hydrogen peroxide dosage was 1500mg/L, 20mL/L respectively, and the optimal reaction time was 60min. Under optimal conditions, COD and chroma removal rate could reach 79.7% and 95.2% respectively.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"33 1","pages":"58-61"},"PeriodicalIF":0.0,"publicationDate":"2015-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77280371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Retraction Note: A New Acetophenone Trimer From Roots of Euphorbia ebracteolata 撤回注:从大戟根中提取的一个新的苯乙酮三聚体
The Open Chemical Engineering Journal Pub Date : 2015-07-31 DOI: 10.2174/1874123101509010162
Di Geng, Xuan Ma, L. Weng, Li-Tao Yi, Y. Han, Xin Yang
{"title":"Retraction Note: A New Acetophenone Trimer From Roots of Euphorbia ebracteolata","authors":"Di Geng, Xuan Ma, L. Weng, Li-Tao Yi, Y. Han, Xin Yang","doi":"10.2174/1874123101509010162","DOIUrl":"https://doi.org/10.2174/1874123101509010162","url":null,"abstract":"A new acetophenone trimer, named ebracteolatain C, along with two known diterpenoids was isolated from Euphorbia ebtacteolata. The structure of the compound 1 was elucidated as 1-[3, 5-bis-(3-acetyl-2, 6-dihydroxy-4methoxy-benzyl)-4, 6-dihydroxy-2-methoxy-phenyl]-ethanone on basis of spectroscopic methods.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"58 1","pages":"162-162"},"PeriodicalIF":0.0,"publicationDate":"2015-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82962625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic Model Parameter Identification and Simulation of SCR Based on Genetic Algorithm 基于遗传算法的SCR动态模型参数辨识与仿真
The Open Chemical Engineering Journal Pub Date : 2015-07-31 DOI: 10.2174/1874123101509010062
Ren Hongjuan, Lou Diming, Zhu Jian, Luo Yiping
{"title":"Dynamic Model Parameter Identification and Simulation of SCR Based on Genetic Algorithm","authors":"Ren Hongjuan, Lou Diming, Zhu Jian, Luo Yiping","doi":"10.2174/1874123101509010062","DOIUrl":"https://doi.org/10.2174/1874123101509010062","url":null,"abstract":"The Selective Catalytic Reduce (SCR) is studied. The unknown parameters of the SCR kinetic model equations are fitted based on the Genetic Algorithm (GA), which is in the range of the allowable error, compared to the experimental data. Then in AVL Boost software, the simulation results of SCR reaction are obtained. Compared to the test data, the simulation results prove that the parameter identification is effective. At last, the SCR reaction is simulated in AVL Boost, and at the same exhaust temperature, the effect of GHSV and NSR on the SCR reaction is studied.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"36 1","pages":"62-66"},"PeriodicalIF":0.0,"publicationDate":"2015-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78668933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental Study for Biogas Upgrading by Water Scrubbing under LowPressure 低压水洗法沼气净化试验研究
The Open Chemical Engineering Journal Pub Date : 2015-06-26 DOI: 10.2174/1874123101509010034
Huang Li, Chu Qing, Tao Hongge, Wang Yan-jin, Xinping Liu
{"title":"Experimental Study for Biogas Upgrading by Water Scrubbing under LowPressure","authors":"Huang Li, Chu Qing, Tao Hongge, Wang Yan-jin, Xinping Liu","doi":"10.2174/1874123101509010034","DOIUrl":"https://doi.org/10.2174/1874123101509010034","url":null,"abstract":"Biogas fuels is effective to alleviate the problem of energy shortage and ecological environment for sustainable developing in rural China. But CO 2 and other impurity in biogas will impede its use for generating high quality energy. In this paper, water scrubbing technology has been used for biogas upgrading under low scrubbing pressure, and the influence of CO 2 removal rate and CO 2 solubility caused by different experimental parameters including the feed gas flow rate, water flow rate and scrubbing pressure were examined, and the experiments dates were analyzed by SPSS17.0, and then the corresponding mathematical models were established. The result showed that, under the three scrubbing pressure level(with normal pressure, 0. 15 Mpa and 0. 3 Mpa), the improve rate of CH 4 volume fraction increased about 15%, and CO 2 volume fraction declined about 20% when scrubbing pressure raised in each level, and under 0.3 Mpa of pressure, with 0.28 of flow rate ratio of gas and liquid, CO 2 removal rate gotten as high as 73.14%.So the method of water scrubbing under low pressure could be used for biogas preliminary upgrading processing when there is rich of water.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"55 1","pages":"34-38"},"PeriodicalIF":0.0,"publicationDate":"2015-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84566789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Optimization of Process on Extracting Flavonoids from Dry Onion Skins by Alkaline Method 碱性法提取干洋葱皮黄酮工艺的优化
The Open Chemical Engineering Journal Pub Date : 2015-06-26 DOI: 10.2174/1874123101509010039
Guoqing Shi, Xiang Qisen, Yichao Fan, Zhao Wenen, Li Yanqi
{"title":"Optimization of Process on Extracting Flavonoids from Dry Onion Skins by Alkaline Method","authors":"Guoqing Shi, Xiang Qisen, Yichao Fan, Zhao Wenen, Li Yanqi","doi":"10.2174/1874123101509010039","DOIUrl":"https://doi.org/10.2174/1874123101509010039","url":null,"abstract":"The flavonoids in dry onion skins were extracted by alkaline solution method. On the basis of single factor combined with ternary quadratic regression general rotary unitized design, the effects of several extraction parameters on the extraction efficiency of total flavonoids were investigated, including extraction times, pH of the extraction solution, material / extraction solution ratio, extraction time, and temperature. NaNO2-Al(NO3)3-NaOH method was used for the determination of total flavonoids. The optimal extraction conditions were as follows: two times of extraction; pH, 11; material / extraction solution ratio, 30 : 1; extraction temperature, 83.0 ~ 84.0 ℃; extraction duration, 1.9 ~ 2.0 h. Under the above optimal conditions, the flavonoids extracted from dry onion skins yielded 2.82%.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"21 1","pages":"39-46"},"PeriodicalIF":0.0,"publicationDate":"2015-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85214941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Application of Design of Experiment and Design Space (DOE-DS) Methodology for the HPLC Separation of Panax Notoginseng Saponins 实验设计与设计空间(DOE-DS)法在三七皂苷HPLC分离中的应用
The Open Chemical Engineering Journal Pub Date : 2015-06-26 DOI: 10.2174/1874123101509010047
Shengyun Dai, Bing Xu, Gan Luo, Jianyu Li, Zhong Xue, Xinyuan Shi, Yanjiang Qiao
{"title":"Application of Design of Experiment and Design Space (DOE-DS) Methodology for the HPLC Separation of Panax Notoginseng Saponins","authors":"Shengyun Dai, Bing Xu, Gan Luo, Jianyu Li, Zhong Xue, Xinyuan Shi, Yanjiang Qiao","doi":"10.2174/1874123101509010047","DOIUrl":"https://doi.org/10.2174/1874123101509010047","url":null,"abstract":"Abatract: Panax Notoginseng Saponins (PNS), extracted from the roots of the common TCM Panax notoginseng (Burk.) F.H.Chen, consist of notoginsenoside R1, ginsenoside Rg1, Re, Rb1, Rd and many other chemicals which haven’t been identified. Due to its popular pharmacological effects, it is of importance to control the quality. This study combines design of experiments and design space methodology to optimize the HPLC separation of PNS. Three common chromatographic parameters (i.e. the temperature, the initial proportion of acetonitrile and the gradient slope) were selected to construct a Box-Behnken design which consisted of 17 experiments. A quadratic model that was built from the experimental result was used to construct the design space. The optimal separation was predicted at temperature 20°C, with a gradient starting at 15% of acetonitrile and a gradient slope of 0.55%/min. Accuracy profile approach was employed to validate the established HPLC method. The results clearly showed that quality by design methodology could be effectively applied to optimize the HPLC chromatographic conditions for the analysis of PNS.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"31 1","pages":"47-52"},"PeriodicalIF":0.0,"publicationDate":"2015-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81195110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
The Synthesis of New Solid-phase Microextraction Adsorption Material and Its Adsorption Performance 新型固相微萃取吸附材料的合成及其吸附性能研究
The Open Chemical Engineering Journal Pub Date : 2015-06-26 DOI: 10.2174/1874123101509010053
Fu Shuang, Xiao Chunhui, L. Hongmei, Xu Feng
{"title":"The Synthesis of New Solid-phase Microextraction Adsorption Material and Its Adsorption Performance","authors":"Fu Shuang, Xiao Chunhui, L. Hongmei, Xu Feng","doi":"10.2174/1874123101509010053","DOIUrl":"https://doi.org/10.2174/1874123101509010053","url":null,"abstract":"This article uses three kinds of monomers: the styrene, butyl acrylate and Vinyltriisopropoxysilane, synthesized the solid phase micro extract coating adsorption material, carries on the structure characterization and the physical performance test. Takes it as the solid phase micro extract coating, carries on the inspection to its adsorbability, the experiment obtains the detection limit of the benzene which is 0.21 μ g/L; The detection limit of the toluene is 30 μ g/L; The detection limit of the m-Xylene is 0.55 μ g/L. Indicated the adsorptivity of this polymer has more effection toward the small molecular aromatic hydrocarbon as the solid phase micro extract coating adsorption material, and the limit of detection is lower compared to the commodity extract coating, there are some promotion and adoption value.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"1 1","pages":"53-57"},"PeriodicalIF":0.0,"publicationDate":"2015-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89295262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on the Synthesis and Application in the Polycarbonat of Silicone- Cyclophosphazene Flame Retardant 有机硅-环磷酰胺阻燃剂的合成及在聚碳酸酯中的应用研究
The Open Chemical Engineering Journal Pub Date : 2015-06-08 DOI: 10.2174/1874123101509010029
Ling Hu, P. He, S. Fang
{"title":"Study on the Synthesis and Application in the Polycarbonat of Silicone- Cyclophosphazene Flame Retardant","authors":"Ling Hu, P. He, S. Fang","doi":"10.2174/1874123101509010029","DOIUrl":"https://doi.org/10.2174/1874123101509010029","url":null,"abstract":"Silicone-cyclophosphazene (SCP) as a flame retardant was synthesized using hydroxyl terminated polydime thylsiloxane(PDMS-OH) and hexa cyclophosphazene silicone oil and phosphonitrilic chloride trimer(HCCTP) as the precursors, The properties of SCP-modified polycarbonat(PC) such as thermal stability, flame retardant properties and carbon layer after combustion were analyzed. It was found that the target product was SCP, as evidenced by infra-red spectrum (IR)and nuclear magnetic resonance(31P-NMR) spectra results. The PC/SCP composite had higher thermal stability, with higher amount of carbon residue at both initial degradation temperature and 800 oC. When the addition of SCP was 10 wt.% in the PC/SCP composite, the oxygen index increased from 28 to 34%, and a V-0 level was achieved on UL - 94 test. Also, a compact structure of the residue carbon layer after combustion was observed.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"1 1","pages":"29-33"},"PeriodicalIF":0.0,"publicationDate":"2015-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84447434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Transition Metal-free Epoxidation of Alkenes Based on the Existence of (2- hydroxypropyl)-β-CD 基于(2-羟丙基)-β- cd的烯烃过渡无金属环氧化反应
The Open Chemical Engineering Journal Pub Date : 2015-04-17 DOI: 10.2174/1874123101509010020
Shi Dongpo, Yin Xianqing, Zheng Yan-cheng, Chen Wu, Fu Jiaxin, Ren Zhaohua
{"title":"Transition Metal-free Epoxidation of Alkenes Based on the Existence of (2- hydroxypropyl)-β-CD","authors":"Shi Dongpo, Yin Xianqing, Zheng Yan-cheng, Chen Wu, Fu Jiaxin, Ren Zhaohua","doi":"10.2174/1874123101509010020","DOIUrl":"https://doi.org/10.2174/1874123101509010020","url":null,"abstract":"A green, efficient epoxidation of alkenes with hydrogen peroxide (H2O2) and sodium bicarbonate (NaHCO3) catalyzed by (2-hydroxypropyl)--cyclodextrin (2-hp--CD) in aqueous solution has been investigated in detail. A range of alkenes were epoxidized at ambient temperature with high yields.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"8 1","pages":"20-24"},"PeriodicalIF":0.0,"publicationDate":"2015-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85441651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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