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棒状结构NaGdF_(4):Yb^(3+),Er^(3+)上转换发光性能的研究
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作者 李鑫 李玉峰 +1 位作者 张栋梁 王觅堂 《功能材料》 CAS CSCD 北大核心 2024年第1期1130-1140,共11页
以乙二胺四乙酸二钠(EDTD-2Na)为螯合剂,采用水热法合成了棒状结构的NaGdF_(4):Yb^(3+),Er^(3+)纳米粉末。分别借助X射线衍射(XRD)、荧光光谱仪(PL)和扫描显微镜(SEM)对其晶体结构、发光强度和表面形貌进行分析和表征。探究了稀土前驱... 以乙二胺四乙酸二钠(EDTD-2Na)为螯合剂,采用水热法合成了棒状结构的NaGdF_(4):Yb^(3+),Er^(3+)纳米粉末。分别借助X射线衍射(XRD)、荧光光谱仪(PL)和扫描显微镜(SEM)对其晶体结构、发光强度和表面形貌进行分析和表征。探究了稀土前驱体、水热温度和水热时间的实验条件对NaGdF_(4):Yb^(3+),Er^(3+)纳米粉末上转换发光强度的影响;研究了氟源和钠源对NaGdF_(4):Yb^(3+),Er^(3+)晶体形貌和上转换发光强度的改善;同时,采用煅烧处理的方法,进一步探究样品的形貌和发光强度收到的影响。实验结果表明NH4F与NaOH作为氟源和钠源及200℃煅烧1 h得到的棒状结构NaGdF_(4):Yb^(3+),Er^(3+)的发光强度最好,色坐标(CIE)绿色发光强度从84%提升到94.88%。 展开更多
关键词 NaGdF_(4):Yb^(3+) Er^(3+) 上转换发光 稀土氯化物 棒状结构 发光纯度
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ClC-3 chloride channel in hippocampal neuronal apoptosis 被引量:3
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作者 Lijuan Xu Shuling Zhang +4 位作者 Hongling Fan Zhichao Zhong Xi Li Xiaoxiao Jin Quanzhong Chang 《Neural Regeneration Research》 SCIE CAS CSCD 2013年第32期3047-3054,共8页
Over-production of nitric oxide is pathogenic for neuronal apoptosis around the ischemic area fol- lowing ischemic brain injury. In this study, an apoptotic model in rat hippocampal neurons was es- tablished by 0.5 mm... Over-production of nitric oxide is pathogenic for neuronal apoptosis around the ischemic area fol- lowing ischemic brain injury. In this study, an apoptotic model in rat hippocampal neurons was es- tablished by 0.5 mmol/L 3-morpholinosyndnomine (SIN-l), a nitric oxide donor. The models were then cultured with 0.1 mmol/L of 4,4'-diisothiocyanostilbene-2,2'-disulfonic acid (DIDS; the chloride channel blocker)for 18 hours. Neuronal survival was detected using the 3-(4,5-dimethylthiazol- 2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, and apoptosis was assayed by Hoechst 33342-labeled neuronal DNA fluorescence staining. Western blot analysis and immunochemilumi- nescence staining were applied to determine the changes of activated caspase-3 and CIC-3 channel proteins. Real-time PCR was used to detect the mRNA expression of CIC-3. The results showed that SIN-1 reduced the neuronal survival rate, induced neuronal apoptosis, and promoted CIC-3 chloride channel protein and mRNA expression in the apoptotic neurons. DIDS reversed the effect of SIN-I. Our findings indicate that the increased activities of the CIC-3 chloride channel may be involved in hippocampal neuronal apoptosis induced by nitric oxide. 展开更多
关键词 neural regeneration brain injury nitric oxide CIC-3 chloride channel 3-morpholinosyndnomine 4 4'-diisothiocyanostilbene-2 2'-disulfonic acid hippocampal neurons apoptosis grants-supportedpaper NEUROREGENERATION
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An efficient synthesis of 2,2′-arylmethylene bis-(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) and 1,8-dioxooctahydroxanthenes using ZnO and ZnO-acetyl chloride 被引量:4
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作者 Malek Taher Maghsoodlou Sayyed Mostafa Habibi-Khorassani +2 位作者 Zahra Shahkarami Nariman Maleki Mohsen Rostamizadeh 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第6期686-689,共4页
2,2'-Arylmethylene bis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) 4l-s produced from reaction between dimedone with various aldehydes in acetonitrile using ZnO as a catalyst;whereas in the presence of ZnO-acetyl ... 2,2'-Arylmethylene bis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) 4l-s produced from reaction between dimedone with various aldehydes in acetonitrile using ZnO as a catalyst;whereas in the presence of ZnO-acetyl chloride catalysts the reaction is limited to give only 1,8-dioxo-octahydroxanthenes 3a-k in very good yields. 展开更多
关键词 ZNO ZnO-acetyl chloride Dimedone Aldehyde 1 8-Dioxooctahydroxanthene 2 2'-Arylmethylene bis(3-hydroxy-5 5-dimethyl-2-cyclohexene-1-one)
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Preparation of LaMnO_3 for catalytic combustion of vinyl chloride 被引量:9
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作者 Li Wang Hongkai Xie +4 位作者 Xingdan Wang Guizhen Zhang Yanglong Guo Yun Guo Guanzhong Lu 《Chinese Journal of Catalysis》 CSCD 北大核心 2017年第8期1406-1412,共7页
LaMnO3was prepared by citrate sol‐gel,coprecipitation,hard template,and hydrothermal methods,respectively,and its catalytic performance for the combustion of vinyl chloride was investigated.N2adsorption‐desorption,X... LaMnO3was prepared by citrate sol‐gel,coprecipitation,hard template,and hydrothermal methods,respectively,and its catalytic performance for the combustion of vinyl chloride was investigated.N2adsorption‐desorption,X‐ray diffraction(XRD),Raman spectroscopy(Raman),O2temperature programmed desorption(O2‐TPD),H2temperature programmed surface reaction(H2‐TPR)and X‐ray photoelectron spectroscopy(XPS)were used to characterize the physicochemical properties of the LaMnO3samples.The preparation methods had obvious effects on the distribution of oxygen and manganese species on the catalyst surface.The reaction followed the suprafacial mechanism;the activity corresponded with the high amount of Mn4+and adsorbed oxygen species.LaMnO3prepared by the citrate sol‐gel method had the best performance for vinyl chloride combustion with T90of182°C.The optimal activity was attributed to the improved redox capability of Mn4+/Mn3+.More available adsorbed oxygen and Mn4+species on the surface were mainly responsible for the remarkable enhancement of the catalytic activity. 展开更多
关键词 LAMNO3 Vinyl chloride Catalytic combustion Low temperature Preparation method
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Lithium chloride ameliorates learning and memory ability and inhibits glycogen synthase kinase-3 beta activity in a mouse model of fragile X syndrome 被引量:3
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作者 Shengqiang Chen Xuegang Luo +6 位作者 Quan Yang Weiwen Sun Kaiyi Cao Xi Chen Yueling Huang Lijun Dai Yonghong Yi 《Neural Regeneration Research》 SCIE CAS CSCD 2011年第31期2452-2459,共8页
In the present study,Fmr1 knockout mice (KO mice) were used as the model for fragile X syndrome.The results of step-through and step-down tests demonstrated that Fmr1 KO mice had shorter latencies and more error cou... In the present study,Fmr1 knockout mice (KO mice) were used as the model for fragile X syndrome.The results of step-through and step-down tests demonstrated that Fmr1 KO mice had shorter latencies and more error counts,indicating a learning and memory disorder.After treatment with 30,60,90,120,or 200 mg/kg lithium chloride,the learning and memory abilities of the Fmr1 KO mice were significantly ameliorated,in particular,the 200 mg/kg lithium chloride treatment had the most significant effect.Western blot analysis showed that lithium chloride significantly enhanced the expression of phosphorylated glycogen synthase kinase 3 beta,an inactive form of glycogen synthase kinase 3 beta,in the cerebral cortex and hippocampus of the Fmr1 KO mice.These results indicated that lithium chloride improved learning and memory in the Fmr1 KO mice,possibly by inhibiting glycogen synthase kinase 3 beta activity. 展开更多
关键词 fragile X syndrome Fmr1 knockout mice step-down test step-through test learning and memory glycogen synthase kinase 3 beta lithium chloride
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Osteocyte viability and bone density in cadmium chloride-induced osteoporosis ameliorated with Pilostigma thonningii stem bark-extracted D-3-O-methy-chiroinositol 被引量:2
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作者 Edwin Aihanuwa Uwagie-Ero Clifford Nwabugwu Abiaezute +4 位作者 Chinaka O.Nwaehujor Theophilus Okafor Nnaji Eugene Amienwanlen Odigie Oyetunde Kazeem Ekeolu Ohiemi Benjamin Ocheja 《Animal Models and Experimental Medicine》 CSCD 2019年第1期25-33,共9页
Background : This study examined the ameliorative effect of D-3-O-methylchiroinositol, isolated from the stem bark of Piliostigma thonningii, on cadmium chloride-induced osteoporosis in male Wistar rats. Methods : Thi... Background : This study examined the ameliorative effect of D-3-O-methylchiroinositol, isolated from the stem bark of Piliostigma thonningii, on cadmium chloride-induced osteoporosis in male Wistar rats. Methods : Thirty-six rats were assigned to three treatment groups(n = 12). Group A(2 mL distilled water), group B:(2.5 mg/kg b.w. CdCl_2) and group C:(2.5 mg/kg b.w. CdCl_2 and D-3-O-methyl-chiroinositol 2 mg/kg b.w.). Bone ash, calcium, phosphate, magnesium, and zinc content, as well as bone histological changes were determined at the end of months 1, 2, and 3. Results : There were significant differences( P ≤ 0.05) in the weight of the cervical, tibia, and femoral bones in all groups. The serum concentration of CdCl_2 was significantly different across the three groups with time. There was significant variation( P < 0.005) in the mean bone ash across groups. The concentration of OH-proline was significantly different( P < 0.0001) across groups. There were significant differences( P < 0.0001) in bone calcium, magnesium, zinc, and phosphorus concentrations. Histology revealed high levels of bone mineralisation in the CdCl_2-treated group, indicative of osteoporosis with hypertrophied osteocytes, while the femur of Wistar rats treated with D-3-O-methyl-chiroinositol showed bone trabeculae and viable osteocytes. Conclusion : The study concluded that D-3-O-methyl-chiroinositol extract from Piliostigma thionningii stem bark ameliorated cadmium chloride-induced osteoporosis in male Wistar rats. 展开更多
关键词 cadmium chloride D-3-O-methyl-chiroinositol OSTEOCYTES OSTEOPOROSIS toxicity AMELIORATION
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Synthesis of some new bis-3,4-dihydropyrimidin-2(1H)-ones by using silica-supported tin chloride and titanium tetrachloride 被引量:1
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作者 Khodabakhsh Niknam Alireza Hasaninejad Madihe Arman 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第4期399-402,共4页
Silica-supported tin chloride and titanium tetrachloride were prepared by the reaction of tin chloride and titanium tetrachloride with activated silica gel in refluxing toluene.These solid acids have been employed as ... Silica-supported tin chloride and titanium tetrachloride were prepared by the reaction of tin chloride and titanium tetrachloride with activated silica gel in refluxing toluene.These solid acids have been employed as the catalysts for the synthesis of bisdihydropyrimidin -2(1H)-ones from aromatic dialdehydes,1,3-dicarbonyl compounds and urea at 90℃under solvent-free conditions. 展开更多
关键词 Silica-supported tin chloride Silica-supported titanium tetrachloride Bis-3 4-dihydropyrimidin-2(1H)-one SOLVENT-FREE 1 3-Dicarbonyl compounds
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Fe_(3)O_(4)@CTAC粒子的制备及抗菌性能研究
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作者 李楠 许伟坚 +1 位作者 苑金磊 刘长霞 《北京化工大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第1期76-83,共8页
采用溶剂热法合成了分散性良好的Fe_(3)O_(4)粒子,然后将油酸修饰到Fe_(3)O_(4)粒子表面,再通过疏水作用进行十六烷基三甲基氯化铵(CTAC)包覆,得到Fe_(3)O_(4)@CTAC粒子。采用扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、X射线衍射(XRD... 采用溶剂热法合成了分散性良好的Fe_(3)O_(4)粒子,然后将油酸修饰到Fe_(3)O_(4)粒子表面,再通过疏水作用进行十六烷基三甲基氯化铵(CTAC)包覆,得到Fe_(3)O_(4)@CTAC粒子。采用扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、X射线衍射(XRD)、Zeta电位和振动样品磁强计(VSM)对Fe_(3)O_(4)@CTAC粒子进行了表征,结果表明:Fe_(3)O_(4)粒子表面包覆CTAC后粒径无明显变化,并且仍保持良好的单分散性;Fe_(3)O_(4)@CTAC粒子具有超顺磁性和良好的磁响应性能;Fe_(3)O_(4)@CTAC粒子的Zeta电位较高,分散体系具有较好的稳定性。对Fe_(3)O_(4)@CTAC粒子进行了抗菌性能及磁分离去除菌体测试,结果显示:当Fe_(3)O_(4)@CTAC粒子的含量为50 mg/mL时,与大肠杆菌(E.coli)(105cfu/mL)作用10 min,抗菌率可达100%;Fe_(3)O_(4)@CTAC粒子对E.coli、金黄色葡萄球菌(S.aureus)及枯草芽孢杆菌(B.subtilis)均具有良好的抗菌效果;通过磁场分离可以将Fe_(3)O_(4)@CTAC粒子及吸附的菌体去除。以上结果表明Fe_(3)O_(4)@CTAC粒子是一种快速、高效、可以实现无菌体残留的抗菌剂,具有潜在的应用价值。 展开更多
关键词 磁性Fe_(3)O_(4)粒子 十六烷基三甲基氯化铵(CTAC) Fe_(3)O_(4)@CTAC 大肠杆菌 抗菌性能
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Preparation of Thin Film Composite Nanofiltration Membrane by Interfacial Polymerization with 3,5-Diaminobenzoylpiperazine and Trimesoyl Chloride 被引量:2
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作者 王丽红 李德玲 +2 位作者 程丽华 张林 陈欢林 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第2期262-266,共5页
A new aromatic diamine,3,5-diaminobenzoylpiperazine (3,5-DABP),was synthesized from 3,5-diaminobenzoic acid and 1-formyl piperazine.The structure of 3,5-DABP was identified by FT-IR spectra and 1H NMR spectra.With 3... A new aromatic diamine,3,5-diaminobenzoylpiperazine (3,5-DABP),was synthesized from 3,5-diaminobenzoic acid and 1-formyl piperazine.The structure of 3,5-DABP was identified by FT-IR spectra and 1H NMR spectra.With 3,5-DABP as aqueous monomer and trimesoyl chloride (TMC) as organic monomer,thin film composite (TFC) nanofiltration membranes were prepared by interfacial polymerization technology.The salt rejection order of these TFC membranes is Na2SO4MgSO4MgCl2NaCl.This sequence indicates that the membranes are negatively charged. 展开更多
关键词 thin film composite membrane 3 5-diaminobenzoylpiperazine trimesoyl chloride interfacial polymerization
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Synthesis of CaZnAl-CO3 ternary layered double hydroxides and its application on thermal stability of poly(vinyl chloride)resin 被引量:2
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作者 ZENG Xiao YANG Zhan-hong 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第3期797-810,共14页
In this work,hydrothermal method was used to prepare the CaZnAl-CO3 ternary layered double hydroxides(CaZnAl-CO3-LDHs)with various Ca/Zn/Al molar ratios,which were characterized by X-ray diffraction(XRD),Fourier trans... In this work,hydrothermal method was used to prepare the CaZnAl-CO3 ternary layered double hydroxides(CaZnAl-CO3-LDHs)with various Ca/Zn/Al molar ratios,which were characterized by X-ray diffraction(XRD),Fourier transform infrared spectroscope(FT-IR)and scanning electron microscopy(SEM)techniques.The obtained results demonstrate that the samples were well-crystallized and flake-structured.The CaZnAl-CO3-LDHs used alone for thermal stability of poly(vinyl chloride)(PVC)resin,with different Ca/Zn/Al molar ratios and varying additive amounts,were investigated through the tests such as static thermal aging,mass loss and congo red,respectively.The optimum Ca/Zn/Al molar ratio and additive amount were 3.6:0.4:2 and 5 phr(parts per hundred PVC resin),respectively.In addition,the synergistic effects of Ca3.6Zn0.4Al2-CO3-LDHs and CaSt2 were discussed in detail,showing better thermal stability compared with Ca3.6Zn0.4Al2-CO3-LDHs used alone,and the optimum additive amounts of Ca3.6Zn0.4Al2-LDHs and CaSt2 were 6 and 1.0 phr,respectively. 展开更多
关键词 CaZnAl-CO3-LDHs synergistic effects thermal stability poly vinyl chloride
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脂肪醇聚氧乙烯醚AEO_(3)和双癸基二甲基氯化铵复配及性能
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作者 李玉霞 张燕 张保柱 《印染助剂》 CAS 2024年第2期23-27,共5页
表面活性剂分子的复配体系往往比单一表面活性剂体系表现出更好的物化性能,因此得到广泛使用。将双癸基二甲基氯化铵DEQ和脂肪醇聚氧乙烯醚AEO_(3)分别按照不同质量比进行复配,详细考察了不同复配体系临界胶束浓度(cmc)、耐碱性、润湿... 表面活性剂分子的复配体系往往比单一表面活性剂体系表现出更好的物化性能,因此得到广泛使用。将双癸基二甲基氯化铵DEQ和脂肪醇聚氧乙烯醚AEO_(3)分别按照不同质量比进行复配,详细考察了不同复配体系临界胶束浓度(cmc)、耐碱性、润湿性、乳化性、发泡性的变化情况。结果显示:复配体系表现出良好的协同效应。当复配比为1∶3时,cmc最低为1.46×10^(-5)mol/L,表面张力r_(cmc)达到最低值29.65 mN/m,表面吸附量Γ_(max)为3.01×10^(-10) mol/m^(2);当复配比为2∶1时,起泡性能优异,泡沫丰富,且稳泡性能达到88%,此对比单一的非离子表面活性剂AEO_(3)具有很大的改善;同时润湿性6.35 s明显高于非离子表面活性剂AEO_(3)。 展开更多
关键词 脂肪醇聚氧乙烯醚AEO_(3) 双癸基二甲基氯化铵 复配 性能
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Strontium chloride-catalyzed one-pot synthesis of 4(3H)-quinazolinones under solvent-free conditions 被引量:2
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作者 Min Wang Zhi Guo Song Ting Ting Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第10期1167-1170,共4页
Strontium chloride was used as an efficient and recyclable catalyst in one-pot condensation of anthranilic acid, ortho esters and amines leading to the formation of 4(3H)-quinazolinone derivatives in good yields at ... Strontium chloride was used as an efficient and recyclable catalyst in one-pot condensation of anthranilic acid, ortho esters and amines leading to the formation of 4(3H)-quinazolinone derivatives in good yields at room temperature under solvent-free conditions. 展开更多
关键词 4(3H)-Quinazolinones One-pot synthesis Solvent-free conditions Strontium chloride
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Preparation and Characterization of γ-Al2O3 by Polyaluminum Chloride with High Al13 Content 被引量:1
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作者 赵长伟 王孝年 +3 位作者 何劲松 栾兆坤 彭先佳 贾智萍 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第2期333-336,共4页
In this paper a polyaluminum chloride solution with high Al13 content was prepared and used as raw material for preparation ofγ-Al2O3.The texture and crystalline phase of the prepared alumina samples were characteriz... In this paper a polyaluminum chloride solution with high Al13 content was prepared and used as raw material for preparation ofγ-Al2O3.The texture and crystalline phase of the prepared alumina samples were characterized by energy dispersive X-ray spectroscopy(EDX) ,X-ray diffraction,transmission electron microscope(TEM) and nuclear magnetic resonance(NMR) analyses.The effects of alkaline solution and calcination temperature were investigated.The results showed that alkaline solution including NH3·H2O and NaOH had little effect on the alumina sample formation.The impurities of NH4Cl and NaCl in solution can be removed through repeated washing by EDX analysis.Calcination temperature had a significant effect on alumina crystal phase.The alumina sample can transform completely toγ-Al2O3 in the subsequent heating from 600°C to 800°C.It is very interesting that Al13 can be existed inγ-Al2O3 phase even after calcinations.The results indicate that polyaluminum chloride with high Al13 content is an effective material to prepareγ-Al2O3. 展开更多
关键词 Γ-AL2O3 polyaluminum chloride PREPARATION AL13
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Oxidation of 2,2'-Dihydroxy-3,3'-di-tert-buty-5,5'-dimethoxyl-biphenyl to 3,3'-Di-tert-butylbiphenyl-2,5,2',5'-diquinone with Copper(Ⅱ)Chloride as Catalyst:Synthesis,Structure and Spectral Properties of Diquinone
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作者 李俊霞 王建革 黄唯平 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第10期1469-1476,共8页
Use of free air as oxidant and copper(II)chloride as catalyst,3,3'-di-tert-butylbi-phenyl-2,5,2',5'-diquinone(BBDQ)was prepared via catalytic oxidation of 2,2'-dihydroxy-3,3'-di-tert-butyl-5,5'-dimethoxy-bip... Use of free air as oxidant and copper(II)chloride as catalyst,3,3'-di-tert-butylbi-phenyl-2,5,2',5'-diquinone(BBDQ)was prepared via catalytic oxidation of 2,2'-dihydroxy-3,3'-di-tert-butyl-5,5'-dimethoxy-biphenyl(di-BHA).The yield of reaction attained 95% and the selectivity for BBDQ was 100%.The single-crystal X-ray diffraction analysis reveals that the dihedral angle between two rings(benzene rings for di-BHA and quinone rings for BBDQ)changes from 89.8 to 45.3o,indicating the steric hindrance effects of methyl disappear in the oxidation process.The crystal structures of di-BHA and BBDQ are further confirmed by their spectral characterizations.The probable mechanism for this oxidation process is also discussed. 展开更多
关键词 catalytic oxidation 3 3'-di-tert-butylbiphenyl-2 5 2' 5'-diquinone 2 2'-dihydroxy-3 3'-di-tert-butyl-5 5'-dimethoxybiphenyl copper(II)chloride
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Effects of ethanol extracts of scorpion on hippocampal apoptosis and caspase-3 expression in lithium chloride-pilocarpine-induced status epilepticus rats 被引量:2
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作者 Liang Yu Hongbin Sun Yi Liang Yan Xie Baoming He Fei Xu 《Neural Regeneration Research》 SCIE CAS CSCD 2010年第2期118-125,共8页
BACKGROUND: Previous studies have demonstrated that scorpion venom in the scorpion can inhibit epilepsy and apoptosis. However, it remains unclear whether ethanol extracts of scorpion (EES) exhibit similar effects.... BACKGROUND: Previous studies have demonstrated that scorpion venom in the scorpion can inhibit epilepsy and apoptosis. However, it remains unclear whether ethanol extracts of scorpion (EES) exhibit similar effects. OBJECTIVE: To investigate the effects of EES on hippocampal apoptosis and caspase-3 expression, and to compare the effects on sodium valproate (positive control drug) in a rat model of status epilepticus induced by lithium chloride-pilocarpine. DESIGN, TIME AND SETTING: This randomized, controlled study was conducted at the Drug Research and Development Center, Kanghong Pharmaceuticals Group, and the Department of Pathology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, China from May 2007 to April 2008. MATERIALS: EES were prepared by Huashen Pharmaceutical, China. Sodium valproate (Hunan Xiangzhong Pharmaceutical, China) and lithium chloride-pilocarpine (Sigma, USA) were also used in the present study. METHODS: From a total of 156 rats, six served as normal controls. The remaining rats were intraperitoneally injected with lithium chloride-pilocarpine to establish status epileptlcus models, and then assigned to five groups (n = 30, respectively). Animals in each group were administered drugs at 15 minutes after epileptic seizure by gavage, i.e. in the normal control and model groups, rats were treated with 1 mL/0.1 kg saline. The sodium valproate group was administered 120 mg/kg/d sodium valproate. The low-, moderate-, and high-dose EES groups received treatments of 290, 580 and 1 160 mg/kg/d EES. The dispensed concentration was 1 mL/0.1 kg. Rat seizure behavior was observed. If status epilepticus did not terminated after 1 hour, the rats were intraperitoneally administered atropine (1 mg/kg) and diazepam (10 mg/kg) to terminate seizure. These rats were continuously observed for 6 hours to ensure seizure termination. Then rats were treated with the above-mentioned drugs at 8:00 am each day until sacrifice, which took place 4 hours after drug administration. MAIN OUTCOME MEASURES: Terminal dUTP nick end labeling (TUNEL)-positive cells and caspase-3 expression were, respectively, determined by TUNEL and immunohistochemistry at 6, 24 48, and 72 hours, as well as 7 days, after status epilepticus. Behavioral changes were also measured. RESULTS: A few caspase-3-positive cells were observed. TUNEL- and caspase-3-positive ceils were mainly visible in the hippocampal CA1 and CA3 regions 6 hours following status epilepticus in the model and drug intervention groups. The number of TUNEL-positive cells reached a peak at 48 hours following status epilepticus in the sodium valproate group, as well as the moderate- and high-dose EES groups, and number of TUNEL-positive cells reached a peak at 72 hours in the model and low-dose EES groups. The number of caspase-3-positive cells reached a peak at 48 hours in each group. Following treatment of sodium valproate and EES, the number of TUNEL- and caspase-3-positive cells significantly decreased compared with the model group at various time points (P 〈 0.05). The number of TUNEL- and caspase-3-positive cells was greatest in the low-dose EES group, followed by the moderate- and high-dose EES groups. The number of TUNEL- and caspase-3-positive cells was similar between the sodium valproate and high-dose EES groups. Epileptic seizure was significantly improved in the sodium valproate group, as well as the moderate- and high-dose EES groups, compared with the model group (P〈 0.05 or P〈 0.01). Treatment with sodium valproate and high-dose EES resulted in the best outcome, although the results were similar (P 〉 0.05). CONCLUSION: A dose of 1 160 mg/kg/d EES significantly inhibited status epilepticus. This outcome corresponded to a decreased number of apoptotlc cells and caspase-3-positive cells, which was similar to sodium valproate. These results suggest that it is not necessary to extract a component from the scorpion for the treatment of epilepsy. The high dose of EES significantly inhibited epilepsy, which correlated with decreased hippocampal caspase-3 expression. 展开更多
关键词 ethanol extracts of scorpion APOPTOSIS terminal dUTP nick-end labeling CASPASE-3 model of status epilepticus lithium chloride-pilocarpine brain injury neural regeneration
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Isobaric Vapor–Liquid Equilibrium for tert-Butyl Alcohol + Water + Propane-1,3-Diol + 1-Ethyl-3-Methylimidazolium Chloride at 101.3 kPa
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作者 Xianbao Cui Qinglong Cheng +5 位作者 Haofei Liu Lexing Xue Jinbo Zhou Ying Zhang Tianyang Feng Kai Zhang 《Transactions of Tianjin University》 EI CAS 2018年第5期424-433,共10页
In this study, we used a mixture of organic liquid propane-1,3-diol and ionic liquid 1-ethyl-3-methylimidazolium chloride([emim]Cl) as the entrainer to separate tert-butyl alcohol(TBA) + water. We measured the isobari... In this study, we used a mixture of organic liquid propane-1,3-diol and ionic liquid 1-ethyl-3-methylimidazolium chloride([emim]Cl) as the entrainer to separate tert-butyl alcohol(TBA) + water. We measured the isobaric vapor–liquid equilibrium(VLE) for the quaternary system TBA + water + propane-1,3-diol + [emim]Cl at 101.3 kPa, and found the VLE data to be well correlated with the nonrandom two-liquid model. These results show that the mixed solvent of propane-1,3-diol + [emim]Cl can increase the relative volatility of TBA to water and break the azeotropic point. We found no notable synergetic effect between them, and observed that the liquid mixed solvent of propane-1,3-diol and [emim]Cl had lower viscosity than [emim]Cl, which makes it a promising entrainer for separating the TBA + water azeotrope in industrial applications. 展开更多
关键词 tert-Butyl alcohol·Water·Propane-1-3-diol·1-Ethyl-3-methylimidazolium chloride·Vapor–liquid EQUILIBRIUM
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Effect of Polyethylene Glycol on the Properties of γ-Al_2O_3 Formation by Polyaluminum Chloride
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作者 赵长伟 王孝年 +2 位作者 何劲松 王园园 栾兆坤 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第5期1034-1038,共5页
A polyaluminium chloride solution with high Al 13 content self-prepared was used as material for preparing the spherical γ-Al 2 O 3 by the sol-gel and oil-drop method. Polyethylene glycol with different molecular mas... A polyaluminium chloride solution with high Al 13 content self-prepared was used as material for preparing the spherical γ-Al 2 O 3 by the sol-gel and oil-drop method. Polyethylene glycol with different molecular mass was used as surfactant to investigate the effect on property of γ-Al 2 O 3 . The physical property was characterized by 27 Al NMR (nuclear magnetic resonance) spectra, X-ray diffraction, FT-IR (Fourier transform infrared spectroscopy) and TG-DTA (thermogravimetric-differential thermal analysis). The results showed that surface area, pore volume and pore size of γ-Al 2 O 3 all increased with the increase of polyethylene glycol molecular mass in the experimental research range, and polyethylene glycol 10000 was the most suitable pore forming additive. γ-Al 2 O 3 with surface area of 339 m 2 ·g 1 , pore volume of 0.59 cm 3 ·g 1 and pore diameter of 6.9 nm were obtained at 450 °C. 展开更多
关键词 γ-Al 2 O 3 polyaluminum chloride PREPARATION polyethylene glycol
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1,6-二氢-4-甲基-6-氧代-3-吡啶磺酰氯的合成工艺研究
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作者 周瑞 周志旭 +5 位作者 岳朝晨 张娅 李磊 高笛 鹿田 柴慧芳 《广东化工》 CAS 2024年第3期1-3,共3页
1,6-二氢-4-甲基-6-氧代-3-吡啶磺酰氯是一种重要医药化工中间体。本文以4-甲基-5-硝基吡啶-2-醇为原料,经两步反应得到目标化合物。该合成方法操作简便、后处理操作简便,花费时间少且产物纯度高,产品收率为33.51%;此方法为1,6-二氢-4-... 1,6-二氢-4-甲基-6-氧代-3-吡啶磺酰氯是一种重要医药化工中间体。本文以4-甲基-5-硝基吡啶-2-醇为原料,经两步反应得到目标化合物。该合成方法操作简便、后处理操作简便,花费时间少且产物纯度高,产品收率为33.51%;此方法为1,6-二氢-4-甲基-6-氧代-3-吡啶磺酰氯的合成提供了合成路线,也为进一步相关类似的合成研究奠定基础。 展开更多
关键词 4-甲基-5-硝基吡啶-2-醇 5-氨基-4-甲基吡啶-2-醇 合成 工艺 医药
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ELECTROCHEMICAL STUDIES OF TITANIUM(IV)IN 1-METHYL-3-ETHYLIMIDAZOLIUM CHLORIDE
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作者 Bei Long FANG Department of Chemistry.Zhongshan University,Guangzhou.510275 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第12期1105-1108,共4页
A Titanium tetrachloride-1-methyl-3-ethytimidazolium chloride melt has been prepared.The reduction process of Ti(IV)appears to be diffusion controlled in the composition of 0.4:1 mole ralio of TiCl_4-1-methyl-3-ethyli... A Titanium tetrachloride-1-methyl-3-ethytimidazolium chloride melt has been prepared.The reduction process of Ti(IV)appears to be diffusion controlled in the composition of 0.4:1 mole ralio of TiCl_4-1-methyl-3-ethylimidazolium chloride and the electrochemical behavior of Ti(IV)shows remarkable compositon dependence. 展开更多
关键词 IV)IN 1-METHYL-3-ETHYLIMIDAZOLIUM chloride TI ELECTROCHEMICAL STUDIES OF TITANIUM TIC
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PI3K/Akt pathway is involved in the activation of RAW 264.7 cells induced by hydroxypropyltrimethyl ammonium chloride chitosan
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作者 YANG Yue XING Rong’e +4 位作者 LIU Song QIN Yukun LI Kecheng YU Huahua LI Pengcheng 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2020年第3期834-840,共7页
We previously demonstrated that 2-hydroxypropyltrimethyl ammonium chloride chitosan(HACC)promoted the production of nitric oxide(NO)and proinflammatory cytokines by activating the mitogen-activated protein kinases(MAP... We previously demonstrated that 2-hydroxypropyltrimethyl ammonium chloride chitosan(HACC)promoted the production of nitric oxide(NO)and proinflammatory cytokines by activating the mitogen-activated protein kinases(MAPK)and Janus kinase(JAK)/STAT pathways in RAW 264.7 cells,indicating good immunomodulatory activity of HACC.In this study,to further investigate the immunomodulatory mechanisms of HACC,we determined the roles of phosphatidylinositol 3-kinase(PI3K)/Akt,activating protein(AP-1)and nuclear factor kappa B(NF-κB)in HACC-induced activation of RAW 264.7 cells by the western blotting.The results suggest that HACC promoted the phosphorylation of p85 and Akt.Furthermore,c-Jun and p65 were also increased after the treatment of RAW 264.7 cells with HACC,indicating the translocation of NF-κB and AP-1 from cytoplasm to nucleus.In addition,as scanning electron microscopy(SEM)analysis shows,the cell morphology changed after HACC treatment.These findings indicate that HACC activated MAPK,JAK/STAT,and PI3K/Akt signaling pathways dependent on AP-1 and NF-κB activation in RAW 264.7 cells,ultimately leading to the increase of NO and cytokines. 展开更多
关键词 hydroxypropyltrimethyl AMMONIUM chloride CHITOSAN RAW 264.7 CELLS PI3K/Akt pathway nuclear factor-κB ACTIVATING protein 1
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