E-journal of Chemistry最新文献_第3页

Synthesis and Performance of N-(Benzoyl) Stearic Acid Hydrazide N-(苯甲酰)硬脂酸肼的合成及性能研究

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/514386

Yan-Hua Cai, Shunhua Li

引用次数: 1

Investigation of Friedel-Crafts Alkylation in the Presence of Supported Sulfonic Acid on Silica Gel 负载型磺酸存在下硅胶上Friedel-Crafts烷基化反应的研究

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/610579

A. Kiasat, M. Karimi-Cheshmeali, R. Soleymani, H. Rajabzadeh

引用次数: 1

Synthesis, Thermal Properties and Nucleating Effect of N, N, N, N'-Tetra(benzoyl) Ethylene Diamine Tetraacetic Acid Dihydrazide as Nucleating Agent of Poly(L-lactic acid) 聚l -乳酸成核剂N, N, N, N'-四(苯甲酰)乙二胺四乙酸二肼的合成、热性能及成核效应

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/645635

Yan-Hua Cai

{"title":"Synthesis, Thermal Properties and Nucleating Effect of N, N, N, N'-Tetra(benzoyl) Ethylene Diamine Tetraacetic Acid Dihydrazide as Nucleating Agent of Poly(L-lactic acid)","authors":"Yan-Hua Cai","doi":"10.1155/2012/645635","DOIUrl":"https://doi.org/10.1155/2012/645635","url":null,"abstract":"N, N, N, N'-Tetra(benzoyl) ethylene diamine tetraacetic acid dihydrazide as nucleating agent of Poly(L-lactic acid) (PLLA) was synthesized from benzoyl hydrazine and tetraacetic acid by acylation and ammoniation. and the structure of this novel tetraamide compound had been characterized by FT-IR. The thermal stability of N, N, N, N'-Tetra(benzoyl) ethylene diamine tetraacetic acid dihydrazide was investigated by TGA thermal analyzer. The result showed good thermal stability of N, N, N, N'-Tetra(benzoyl) ethylene diamine tetraacetic acid dihydrazide under 170 °C. N, N, N, N'-Tetra(benzoyl) ethylene diamine tetraacetic acid dihydrazide modified PLLA sample was prepared by a melt-mixing technique. With incorporation of 0.5% N, N, N, N'-Tetra(benzoyl) ethylene diamine tetraacetic acid dihydrazide, Non-isothermal crystallization behavior at different cooling rate showed the crystallization peak of PLLA became sharper and shift to higher temperature, and indicated that the presence of N, N, N, N'-Tetra(benzoyl) ethylene diamine tetraacetic acid dihydrazide accelerated the overall PLLA crystallization.","PeriodicalId":11519,"journal":{"name":"E-journal of Chemistry","volume":"9 1","pages":"1575-1580"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/645635","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64340515","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: 4

Recycling of Different Available Organic Wastes through Vermicomposting 利用蚯蚓堆肥回收不同的有机废物

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/945762

S. Karmakar, K. Brahmachari, A. Gangopadhyay, S. R. Choudhury

{"title":"Recycling of Different Available Organic Wastes through Vermicomposting","authors":"S. Karmakar, K. Brahmachari, A. Gangopadhyay, S. R. Choudhury","doi":"10.1155/2012/945762","DOIUrl":"https://doi.org/10.1155/2012/945762","url":null,"abstract":"Generation of organic wastes has been increased in an unprecedented rate in India with rapid population expansion, leading to disposal problems. These organic wastes can be converted into valuable wealth by applying vermicomposting technology. Vermicompost which provides macro and micro nutrients to the plants, also reduces pollution by providing a valuable substitute for chemical fertilizers. Present paper deals with vermicomposting of organic wastes from seven different sources and evaluation of nutrient in those vermicomposts following chemical analyses. These seven sources include coconut coir, water hyacinth, mixed materials, cabbage, banana pseudostem, cow dung, and rice husk. Three composting species of earthworms e.g. Eisenia. fetida, Eudrilus. eugeniae, and Perionyx excavatus were chosen for the experiment. Chemical analysis of vermicomposts under study clearly showed that the vermicompost from water hyacinth contained maximum amount of organic C, total N, and total K though the phosphorous content was maximum in vermicompost from mixed materials. Lowest nutrient content was observed in vermicompost of coconut coir. Vermicomposts from mixed materials, cabbage, banana pseudostem were at per in their chemical properties. It can be concluded that among the seven sources, vermicompost from water hyacinth is best for its nutrient value.","PeriodicalId":11519,"journal":{"name":"E-journal of Chemistry","volume":"9 1","pages":"801-806"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/945762","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64369952","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: 12

Effect of Temperature on the Critical Micelle Concentration and Micellization Thermodynamic of Nonionic Surfactants: Polyoxyethylene Sorbitan Fatty Acid Esters 温度对非离子表面活性剂聚氧乙烯山梨糖脂肪酸酯临界胶束浓度和胶束热力学的影响

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/961739

E. Mohajeri, G. D. Noudeh

{"title":"Effect of Temperature on the Critical Micelle Concentration and Micellization Thermodynamic of Nonionic Surfactants: Polyoxyethylene Sorbitan Fatty Acid Esters","authors":"E. Mohajeri, G. D. Noudeh","doi":"10.1155/2012/961739","DOIUrl":"https://doi.org/10.1155/2012/961739","url":null,"abstract":"In this study, non-ionic surfactants, polyoxyethylene sorbitan fatty acid esters (polysorbate) are chosen to examine the temperature effect on the CMC over a wide temperature range. The enthalpy and entropy of micelle formation are evaluated according to the phase separation model. The surface tension of solutions was determined by means of Du Nouys ring. The CMC values were taken from the sharp breaks in the surface tension vs. logarithms of surfactant concentration plots. As the surfactants' chain length increases the CMC at a constant temperature decreases, which is directly related to the decrease of hydrophilicity of the molecules. For each surfactant, as the system temperature increases, the CMC initially decreases and then increases, owing to the smaller probability of hydrogen bond formation at higher temperatures. The onset of micellization tends to occur at higher concentrations as the temperature increases. To evaluate the enthalpy of micellization, the CMCs are first correlated by a polynomial equation. It is found that ∆Gom decreases monotonically as the temperature increases over the whole temperature range. Both ∆Hom and ∆Som appear to be decrease monotonically with an increase in temperature. The compensation temperature was found to be 42 oC by linear regression over the whole temperature range and for all three surfactant systems together.","PeriodicalId":11519,"journal":{"name":"E-journal of Chemistry","volume":"9 1","pages":"2268-2274"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/961739","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64371509","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: 118

Synthesis, Characterization and Antimicrobial Activity of Imidazole Derivatives Based on 2-chloro-7-methyl-3-formylquinoline 2-氯-7-甲基-3-甲酰基喹啉类咪唑衍生物的合成、表征及抗菌活性研究

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/164235

R. Parab, B. Dixit

引用次数: 6

Synthesis of Schiff Bases of 2-amino-5-aryl-1,3,4-thiadiazole and Its Analgesic, Anti-Inflammatory and Anti-Bacterial Activity 2-氨基-5-芳基-1,3,4-噻二唑席夫碱的合成及其镇痛、抗炎和抗菌活性

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/145028

Alok Pandey, R. Rajavel, Sandeep Chandraker, D. Dash

引用次数: 57

Nitrate Removal from Ground Water: A Review 地下水中硝酸盐的去除研究进展

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/154616

Archna, Sur Sharma, R. Sobti

引用次数: 110

Optimization conditions of extracellular proteases production from a newly isolated streptomyces pseudogrisiolus NRC-15 新分离伪灰链霉菌NRC-15胞外蛋白酶生产条件的优化

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/168540

E. Mostafa, M. Saad, H. Awad, M. Selim, H. Hassan

{"title":"Optimization conditions of extracellular proteases production from a newly isolated streptomyces pseudogrisiolus NRC-15","authors":"E. Mostafa, M. Saad, H. Awad, M. Selim, H. Hassan","doi":"10.1155/2012/168540","DOIUrl":"https://doi.org/10.1155/2012/168540","url":null,"abstract":"Microbial protease represents the most important industrial enzymes, which have an active role in biotechnological processes. The objective of this study was to isolate new strain of Streptomyces that produce proteolytic enzymes with novel properties and the development of the low-cost medium. An alkaline protease producer strain NRC-15 was isolated from Egyptian soil sample. The cultural, morphological, physiological characters and chemotaxonomic evidence strongly indicated that the NRC-15 strain represents a novel species of the genus Streptomyces, hence the name Strptomyces pseudogrisiolus NRC-15. The culture conditions for higher protease production by NRC-15 were optimized with respect to carbon and nitrogen sources, metal ions, pH and temperature. Maximum protease production was obtained in the medium supplemented with 1% glucose, 1% yeast extract, 6% NaCl and 100 μmol/L of Tween 20, initial pH 9.0 at 50 °C for 96 h. The current results confirm that for this strain, a great ability to produce alkaline proteases, which supports the use of applications in industry.","PeriodicalId":11519,"journal":{"name":"E-journal of Chemistry","volume":"9 1","pages":"949-961"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2012/168540","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64298115","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: 22

An Efficient One-Pot Synthesis of 1,8-Dioxodecahydroacridines Using Silica-Supported Polyphosphoric Acid (PPA-SiO2) under Solvent-Free Conditions 无溶剂条件下二氧化硅负载多磷酸(PPA-SiO2)一锅高效合成1,8-二氧十二氢吖啶化合物

E-journal of Chemistry Pub Date : 2012-01-01 DOI: 10.1155/2012/214231

F. Moeinpour, A. Khojastehnezhad

引用次数: 20