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Organolanthanide Compounds Containing methanesulfonate and Pyrazinamide Ligand in Styrene Polymerization

Journal of Rare Earths 2007年第2期25卷 135-138页

作者： Josué Garcia Quini Alessandra de Souza Maia Renata Diana Miotti Tereza Silva Martins Wanda de Oliveira Instituto de Qulmica Universidade de Sāo Paulo CP 26077 05513-970 Sdo Paulo-SP Brazil

The synthesis of organolanthanide compounds identified as LnCp^＊（MS）2PzA, Ln = Sm, Tb, Yb （MS = methanesulfonate, Cp^＊ = pentamethylcyclopentadienyl, and PzA = pyrazinamide）, by the reaction of coordination compounds Ln（MS）3（PzA）4 with NaCp in THF was reported. The complexes were formulated according to elemental analyses, complexometric titration with EDTA （%Ln）, and ^1H NMR. IR spectroscopy revealed that PzA coordinates with lanthanide （Ⅲ） ions and methanesulfonate coordinates via oxygen atoms in a non-equivalent manner. In preliminary catalytic studies, these compounds were active in styrene polymerization that used MAO as a cocatalyst with an activity of 12.3 kg PS molSm^-1h^-1. Differential scanning calorimetry （DSC） of polystyrene showed that the polymer was mainly atactic.

关键词： organolanthanides pentamethylcyclopentadienyl methanesulfonate pyrazinamide styrene polymerization rare earths

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Irrigation's effect and applied selection on the fiber quality of Ethyl methanesulfonate (EMS) treated upland cotton (Gossypium hirsutum L.)

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Journal of Cotton Research 2019年第4期2卷 1-11页

作者： WITT Travis W. ULLOA Mauricio PELLETIER Mathew G MENDU Venugopal RITCHIE Glen L. Plant and Soil Science Department Texas Tech UniversityLubbockTX 79409-2122USA USDA-ARS PACSRLPlant Stress and Germplasm Development ResearchLubbockTX 79415USA USDA-ARS PACSRLPlant Stress and Germplasm Development ResearchLubbockTX 79415USA

Background:Producing rainfed cotton (Gossypium hirsutum L.) with high fiber quality has been challenging in the Texas High Plains because of extended periods of insufficient rainfall during sensitive boll developmental *** variation created by Ethyl methanesulfonate (EMS) mutagen has successfully improved fiber quality of ***,little is known about the effect of water deficit environments on fiber *** EMS treated populations were advanced from the first to the fourth generation (M1 to M4) as bulk harvested ***2014,single-plant divergent selection was applied based on perceived morphological and agronomic differences seen during and at the end of the ***:Analyses from these selections in 2014-2016 showed significant (P < 0.05) improvement between and within populations for fiber traits (micronaire,length,strength,uniformity,and elongation) when compared with the original non-treated EMS source;some selections were found to have excellent fiber quality under diverse ***:Some of these selections are being considered for germplasm release and could be useful for improving the fiber quality of cotton under water limited conditions,thereby helping to ensure the long-term survival of the cotton industry on the Texas High Plains.

关键词： Breeding Drought EMS Ethyl methanesulfonate Fiber quality Selection

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Ethyl methanesulfonate (EMS)-Mediated Mutagenesis of Cucumber (<i>Cucumis sativus</i>L.)

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Agricultural Sciences 2014年第8期5卷 716-721页

作者： Lina Wang Bing Zhang Jinrui Li Xiaoyu Yang Zhonghai Ren College of Horticulture Science and Engineering Shandong Agricultural University Tai’an China School of Life Sciences Faculty of Science The Chinese University of Hong Kong Hong Kong China

Ethyl methanesulfonate (EMS) is a stable and effective chemical mutagen. In this study, cucumber (Cucumis sativus L. cv. “Shannong No. 5”) seeds were treated by 1% EMS for 12 h, 24 h and 48 h to optimize EMS mutagenesis and determined median lethal dose of EMS (1% EMS and 24 h) for “Shannong No. 5”. After treated by 1% EMS for 24 h, 541 M1 plants were grown in greenhouse for phenotype investigation. The fertility of M1 cucumbers was very low, and only 79 lines produced seeds after self crossing. 60 independent M2 families comprising 600 M2 plants were investigated for phenotypic alteration, and 11 individual mutant lines were isolated into six groups: short-fruit mutants, long-fruit mutants, small-flower mutants, big-flower mutants, opposite-tendril mutants and clustered-leaf mutants. The mutation frequency was 18.3%. Two selected representatives, short-fruit mutants and clustered-leaf mutants, showed 1:3 of segregation ratio in M2 populations. This ratio is consistent with classic Mendelian model, indicating that the two kinds of mutants may be controlled by a single recessive gene, respectively. Long-fruit phenotype was stably inherited and no segregation was observed in M3 generation, indicating that this mutant line may be homozygous.

关键词： Cucumber Ethyl methanesulfonate Mutagenesis

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Stereoselective Synthesis of （R）-Salmeterol via Asymmetric Cyanohydrin Reaction

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Chemical Research in Chinese Universities 2014年第5期30卷 770-773页

作者： LI Wei HUANG Hai JIN Xiaodong LIU Yujian XU Chaohang ZHU Hongjun Department of Applied Chemistry College of Sciences Nanjing Tech University Nanjing 211816 P. R. China

The authors described a short and highly enantioselective route to （R）-salmeterol involving asymmetric synthesis of cyanohydrin followed by nucleophilic substitution with 6-（4-phenylbutoxy） hexyl methanesulfonate.

关键词： Asymmetric synthesis Catalysis Cyanohydrin Ethanolamine methanesulfonate

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