Retracted article: Synthesis of hydroxylated and methoxylated polybrominated diphenyl ethers

Retraction: ZHENG Ke-wen, GAO Li-ping, CAO Jie, YU Hai-wen, ZHANG Zhang. Synthesis of hydroxylated
and methoxylated polybrominated diphenyl ethers. Journal of Shanghai University (English Edition), 2009, 13(1):
81–87. DOI: 10.1007/s11741-009-0116-3.     

海产贝类体内多溴联苯醚污染状况及风险

多溴联苯醚（PBDEs）是一类具有生态风险性的新型持久性有机污染物,各种生物体和非生物体都检测到不同浓度的PBDEs,已经引起广泛关注。概述了PBDEs在海产贝类体内的的污染情况,分析了其时空分布变化趋势,详细阐述人体通过饮食摄入PBDEs的情况及其对人体健康的影响。     

二甘醇单醚的合成和性能

以二甘醇和卤代烷为原料,用相转移催化法合成了７种二甘醇单烷基醚,均获得较高产率。讨论了二甘醇单醚合成的应用历程,并对其物理常数,水溶液的表面张力,起泡性能,临界胶束浓度进行了测试和分析。     

RETRACTED ARTICLE: The moderating role of resilience in the relationship between academic burnout and the perception of psychological health in nursing students

The objective of this study was to analyse the role of resilience in the dimensions of academic burnout syndrome and psychological health in a sample of nursing students. A battery of questionnaires was administered to 218 nursing students, all of whom were in the second year of their degree at the University of Murcia (Spain). The applied protocol used the CD-RISC 10 scale for the measurement of resilience, the burnout scale MBI, and the GHQ-12 questionnaire to assess psychological health. The findings showed a significant relationship between resilience and burnout, emotional exhaustion and self-efficacy, as well as with psychological health. Moreover, three burnout dimensions were found to be significantly linked to psychological health in the way we had predicted. A stepwise regression analysis indicated the moderating role of resilience on psychological health in emotionally exhausting situations. We conclude that the psychological characteristic resilience moderated the effect of emotional exhaustion on the psychological health of the students. The practical implications of the results are discussed in order to introduce measures for the proper training of nursing students for professional practice; we also make several suggestions for future research in this field.     

柱撑粘土皂石的合成及其表征

用水热法合成了柱撑粘土皂石,用羟基铝与其交联,并对其进行了表征.合成出的柱撑粘土皂石显示出较高的热稳定性,在结构上也与文献报道相符.     

聚(N-异丙基丙烯酰胺)及聚(N-异丙基丙烯酰胺-共-丙烯酰胺)水凝胶的制备及性能

The thermosensitive poly （ N-isopropylacrylamide ） （PNIPAAm） and poly （N-isopropylacrylamide-co-acrylamide） [ poly （NIPAAm-co-AAm） ] hydrogels with different acrylamide molar percentage are prepared by radiation polymerization using Co^60 γ-ray. Their swelling equilibrium data in the media of deionized water, NaCl aqueous solutions and different pH buffer solutions are determined. It appears that lower critical solution temperature （LCST） of the hydrogels will drop with the increase of ionic strength and increase with the rising of acrylamide content, A semi-empirical formula is set up with the experimental results. Moreover, it also indicates that this copolymer is pH-sensitive, which is similar to the homopolymer of PNIPAAm.     

Sm/TiCl4 （cat.） system-mediated intermolecular and intramolecular reductive coupling reactions of ketones with esters

Sm/TiCl4 system could well integrate the high reactivity of samarium（Ⅱ） and high deoxygenation capacity of low valent titanium within one system. In this paper, the intermolecular and intramolecular reductive coupling reactions of ketones with esters mediated by metallic samarium （Sm） and a catalytic amount of titanium tetrachloride （TiCl4） were successfully developed. A series of substituted ketones and cyclic β-keto-esters were prepared in moderate to good yields under reflux and neutral conditions.     

Synthesis of atrazine-HPCD inclusion and its bioactivity

The inclusion of atrazine with 2-hydroxypropyl-β-cyclodextrin(HPCD) was synthesized by ultrasonic method, and it was characterized by UV, XRD and 1H NMR. The solubility in water and the bioactivity of the inclusion were also studied here. The results indicated that the UV maximum absorption wavelength of the inclusion remained at 223 nm, while its intensity decreased. The XRD peaks of atrazine disappeared, weakened and shifted in the inclusion, and the chemical shift of H-3 and H-5 of cyclodextrin inner cavity led to the upfield. The characterization data showed that the atrazine-HPCD inclusion had already formed. At the same time, the solubility of the atrazineHPCD inclusion in water became 20.08 times as that of atrazine. Moreover, the atrazine-HPCD inclusion had better herbicidal activity. When the concentration of the inclusion was 6.5 mg/mL, the inhibition ratios of the inclusion to taproot length, taproot fresh weight, sprout length and sprout fresh weight of barnyard grass were 66.96%, 57.22%, 70% and 57.53%, respectively, which were all higher than those of atrazine.     

Synthesis of CdSe quantum dots via paraffin liquid and oleic acid

This paper reported an efficient and rapid method to produce highly monodispersed CdSe quantum dots （QDs）, in which the traditional trioctylphosphine oxide （TOPO） was replaced by paraffin liquid as solvent and oleic acid as the reacting media. The experimental conditions and the properties of QDs had been studied in detail. The resulting samples were confirmed of uniform size distribution with transmission electronic microscopy （TEM）, while UV-vis absorption and photoluminescence （PL） spectra clearly indicated that such synthesized QDs had good fluorescence properties.     

大孔交联聚(N—乙烯基乙酰胺)的合成及其对水溶液中单宁的氢键吸附

合成了既含氢键供体 ,又含氢键受体的强亲水性氢键吸附剂—聚 (N—乙烯基乙酰胺 )。通过测定它对水溶液中单宁的等温吸附线 ,利用热力学函数关系计算吸附热ΔHm值 ,证明其吸附机理为氢键吸附。通过测定它对 60 0mgL- 1 以下单宁水溶液的动态吸附性能 ,发现在流速为 3BV/h ,流出液体积为1 0 0BV时 ,单宁的去除率在 90 %以上 ,说明该吸附剂是一种较好的单宁去除剂 ,具有一定的应用价值     

Synthesis of a novel UV-curable prepolymer neopentyl glycol diglycidyl ether diacrylate and its cured film tensile property

A novel UV-curable prepolymer neopentyl glycol diglycidyl ether diacrylate(NPGGEA)was synthesized by using neopentyl glycol diglycidyl ether(NPGGE)and acrylic acid(AA)as starting materials, N, N-dimethylbenzylamine as catalyst and p-hydroxyanisole as inhibitor. The optimum synthetic conditions were taken as follows: The concentration of N,N-dimethylbenzylamine, 0.80% of reactants; the concentration of p-hydroxyanisole, 0.3% of reactants; the reaction temperature, 90-110℃; the molar ratio of NPGGE to AA, 1:2.2. Meanwhile, 1-hydroxycyclohexyl phenyl ketone of a UV-cured initiator was added to the synthesized NPGGEA to prepare a kind of UV-cured coating. Mechanical properties of the UV-cured films were determined, giving 28.75 MPa of tensile strength, 923.82 MPa of Young‘s modulus and 5.51% of elongation at tear.     

吡咯并吡啶（喹啉）类化合物的简易合成

以β－甲基吡啶β－甲基喹啉与芳香腈为原料,经二异丙胺锂催化而环化,有效合成了具有潜在生物活性的几种新化合物,其目标化合物的结构经光谱和元素分析数据所确证。     

反相乳液聚合法合成聚丙烯酸纳米及微米颗粒

采用反相乳液聚合方法,合成纳米及微米级尺寸的聚丙烯酸吸水性颗粒.将Span-80和Twoon-80组成的协同乳化体系分散于烷烃介质,使聚合体系稳定化.聚合初期,单体存在于乳化液滴和胶束中.在自由基引发下,聚合得到的聚丙烯酸颗粒大小均一,且其尺寸取决于引发剂的类型.若使用水溶性引发剂,如过硫酸铵,得到微米级的颗粒;若使用油溶性的偶氮二异丁腈作引发剂,由于丙烯酸的齐聚物分子链在油性连续相中溶解受限,则得到纳米级颗粒.     

一种四氮杂希夫碱大环配合物LCo[Co(SCN)6]0.5·H2O的水热法合成与表征

以水热法合成了一个新的大环配合物LCo[Co(SCN)6]0.5.H2O(L为5,12-二甲基-7,14-二苯基-1,4,8,11-四氮杂环十四—4,11—二烯),经元素分析、红外光谱、电子光谱以及摩尔电导等对其结构进行了表征,其中钴(Ⅱ)离子为六配位的八面体构型。     

为“跩”正名、正形——“跩”的流行义及其误用

"跩"这个词,自从有了"显摆、炫耀"乃至"洒脱、快乐、霸气"的词义后,一直被人们误解和误用:一是误解为方言词——其实它的使用已远远超出了方言的范畴;二是其字形常常被人们误写作"拽"。其实,"显摆,炫耀"的新义是由"跩"的本义"(走路)摇摆"引申而来的。"拽"字不具有"显摆、炫耀"的词义。     

激光轰击制备碳纳米管及其相关纳米材料

采用Nd：YAG脉冲激光在常温常压下轰击浸于乙醇流动相中的铁／石墨混合靶进行制备碳纳米管的研究。用傅立叶红外光谱、X射线衍射和透射电镜等现代分析技术分别对激光轰击所得产物进行表征。结果表明，以铁为催化剂，激光波长为1064nm，激光功率密度为4．5x10^9W/cm^2的条件下可成功制备碳纳米管，并且，透射电镜观察到所得的碳纳米管管径约为20～50nm，长度约几百nm，最长可达1μm以上。     

Synthesis and Characterization of Poly（ N-Vinyl-2-Pyrrolidone／Itaconic Acid） Hydrogel

With N-vinyl-2-pyrrolidone (NVP) and itaconic acid ( IA ), poly ( N-vinyl-2-pyrrolidone/itaconic acid) [ P(NVP/IA) ] hydrogel was synthesized by free radical solution polymerization. The structure of this P(NVP/IA) was characterized by IR. Effects of concentration of itaconic acid, amount of cross-link agent,N, N‘-methylene-bis-acrylamide, reaction temperature, and time on properties of swelling ratio (SR) of the hydrogel were investigated. The results show that the best swelling property of the hydrogel is obtained at 50 ℃ and 1.5 h. pH sensitivity increases as the concentration of itaconic acid in the hydrogel system increases.Swelling ratio of the hydrogel decreases as the amount of cross-link agent increases.     

基于瞬态反射-透射技术的金属纳米薄膜电子和晶格传热动力学研究

使用飞秒瞬态反射-透射技术研究了金和铜纳米薄膜的电子和晶格动力学,应用双温和Curde近似模型分析了金属薄膜的非平衡热传导动力学.假设在瞬态反射中电子-晶格耦合常数为常数的情况下,计算超快脉冲加热后的电子和晶格温度.金和铜纳米薄膜的反射和透射信号在初始2 ps内相似,随后时间里信号明显不同,透射模式下的电子-晶格耦合效应要比反射模式下的更强和更敏感.这是由于沿着膜厚方向的温度变化受到金属薄膜和基底间的界面散射影响造成的.在研究半透明薄膜的超快动力学过程中,需要同时考虑反射和透射情况.     

Synthesis and Characterization of Modified Epoxy Resins by Silicic Acid Tetraethyl Ester and Nano-SiO2

A kind of modified epoxy resins was obtained by condensation of epoxy resin with silicic acid tetraethyl ester(TEOS) and nano-SiO2. The reactions were performed with hydrochloric acid as a catalyst at 63℃. The structure, thermal stability and morphological characteristics of the modified epoxy resins were studied through infrared spectra (FF-IR) analysis, thermogravimetric (TG) analysis and scanning electron microscopy respectively. It has been found from the IR and TG study that modified epoxy resins have greater thermal stability than epoxy resins, and its thermal stability has been improved by the formation of inter-crosslinked network structure. The modified epoxy resins exhibit heterogeneous morphology and heterogeneity increases with more TEOS feeding, which in turn confirms the formation of inter-crosslinked network structure in modified epoxy resins.     

Topical imiquimod treatment of cutaneous vascular disorders in pediatric patients: clinical evaluation on the efficacy and safety

Objective:To evaluate the clinical effect of topical imiquimod treatment on cutaneous vascular disorders in pediatric patients.Methods:A retrospective investigation was conducted in 25 pediatric patients with cutaneous vascular disorders,including 19 infantile hemangiomas(IHs)(12 superficial/7 mixed type),5 nevus flammeus(NF),and 1 pyogenic granuloma(PG).Imiquimod 5% cream was applied every other day for 4 to 16 weeks(average 9.6 weeks).Results:Of the 19 IHs treated,an overall efficacy of 52.6% was achieved,with a clinical resolution rate of 15.8%,excellent rate of 26.3%,and moderate rate of 10.5%.The superficial type responded the best at 66.7%,while the mixed type showed only 28.6% effectiveness,which was predominantly from their superficial parts.No obvious response was noted in the 5 patients with NF.Side effects were observed in 78.9% of the patients,mostly mild to moderate local irritations and occasionally severe reactions such as thick crusting and ulceration.Systemic side events were observed in 4 IH patients including fever and digestive tract reactions.No recurrence was observed during the follow-up examination.Conclusions:Topical imiquimod could be an alternative option for the treatment of uncomplicated superficial IHs with satisfactory tolerability.