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Removal of S^(2-) ion from sodium aluminate solutions with sodium ferrite 被引量:3
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作者 李小斌 牛飞 +4 位作者 谭杰 刘桂华 齐天贵 彭志宏 周秋生 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第5期1419-1424,共6页
The synthesis of sodium ferrite and its desulfurization performance in S2 -bearing sodium aluminate solutions were investigated. The thermodynamic analysis shows that the lowest temperature is about 810 K for synthesi... The synthesis of sodium ferrite and its desulfurization performance in S2 -bearing sodium aluminate solutions were investigated. The thermodynamic analysis shows that the lowest temperature is about 810 K for synthesizing sodium ferrite by roasting the mixture of ferric oxide and sodium carbonate. The results indicate that the formation process of sodium ferrite can be completed at 1173 K for 60 min, meanwhile raising temperature and reducing NazCO3 particle size are beneficial to accelerating the formation of sodium ferrite. Sodium ferrite is an efficient desulfurizer to remove the S2- in aluminate solution, and the desulfurization rate can reach approximately 70% at 373 K for 60 min with the molar ratio of iron to sulfur of 1:1-1.5:1. Furthermore, the desulfurization is achieved by NaFeS2·2H2O precipitation through the reaction of Fe(OH)4 and S^2- in aluminate solution, and the desulfurization efficiency relies on the Fe(OH)4^- generated by dissolving sodium ferrite. 展开更多
关键词 sodium ferrite S^2- sodium aluminate solution DESULFURIZATION
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Separation of potassium from sodium in alkaline solution by solvent extraction with 4-tert-butyl-2-(α-methylbenzyl)phenol
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作者 XING Peng WANG Cheng-yan +1 位作者 CHEN Yong-qiang MA Bao-zhong 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第7期2003-2009,共7页
This work investigated the separation of potassium from sodium in alkaline solution using substituted phenol-based extractants.Superior potassium extraction was achieved with 4-tert-butyl-2-(α-methylbenzyl)phenol(t-B... This work investigated the separation of potassium from sodium in alkaline solution using substituted phenol-based extractants.Superior potassium extraction was achieved with 4-tert-butyl-2-(α-methylbenzyl)phenol(t-BAMBP)than 4-sec-butyl-2-(α-methylbenzyl)phenol(BAMBP).The optimum conditions for the extraction were 1 mol/L t-BAMBP,3:1 volumetric phase ratio(O/A),and two extraction stages.After cross-current extraction,the extraction ratio of potassium reached 90.8%.After scrubbing with deionised water at phase ratio of 4:1 and scrubbing stage of 4,a sodium scrubbing efficiency of 88.2%was obtained.After stripping using 1 mol/L H_(2)SO_(4) at phase ratio of 3:1,the stripping efficiency of potassium reached 94.2%.The potassium/sodium(K/Na)concentration ratio increased 14.3 times from 0.15 in the feed solution to 2.3 in the stripping solution.The efficient separation of potassium from sodium in alkaline solution was achieved via solvent extraction with t-BAMBP. 展开更多
关键词 4-tert-butyl-2--methylbenzyl)phenol(t-BAMBP) POTASSIUM sodium solvent extraction separation
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Room Temperature Phosphorescence of 1-Bromo-4-(bromoacetyl) naphthalene Induced by Sodium Deoxycholate
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作者 YuWANG WeiJunJIN JianBingCHAO LiPingQIN 《Chinese Chemical Letters》 SCIE CAS CSCD 2004年第3期339-342,共4页
Sodium deoxycholate (NaDOC) could induce 1-bromo-4-(bromoacetyl) naphthalene (BBAN) to emit strong room temperature phosphorescence (RTP). Measurements of phosphore- scence spectra, peak intensity and polarization we... Sodium deoxycholate (NaDOC) could induce 1-bromo-4-(bromoacetyl) naphthalene (BBAN) to emit strong room temperature phosphorescence (RTP). Measurements of phosphore- scence spectra, peak intensity and polarization were used to investigate the solubilization of BBAN as a function of NaDOC concentration. 展开更多
关键词 sodium deoxycholate 1-bromo-4-(bromoacetyl) naphthalene room temperature phos- phorescence.
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Synthesis of Sodium 2-[4(S)-4-Amido-3-oxo-2-isoxazolidinyl]-5-oxo-2-tetrahydrofurancarboxylate and Its Antibacterial Activities
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作者 Master’s Degree Wen-Zheng Liu Supervisor Prof.Zheng-Hua Li College of Pharmacy,West China University of Medical Sciences,Chengdu 610041 《Journal of Chinese Pharmaceutical Sciences》 CAS 1993年第2期171-172,共2页
Lactivicin,a novel inhibitor of bacterial cell wall synthesis,was isolated from the culture fil-trates of microorganism YK-258 and YK-422.It exhibits biological activities similar to those ofthe β-lactam antibiotics,... Lactivicin,a novel inhibitor of bacterial cell wall synthesis,was isolated from the culture fil-trates of microorganism YK-258 and YK-422.It exhibits biological activities similar to those ofthe β-lactam antibiotics,although it does not have a β-lactam ring in its molecule.Since the discovery of lactivicin,hundreds of its derivatives have been synthesized. 展开更多
关键词 sodium 2-[4(S)-4-amido-3-oxo-2-isoxazolidinyl]-5-oxo-2-tetrahydrofurancarboxylate Antibacterial activity
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Systematic pharmacology analysis of Sodium 8-(((carboxymethyl)amino)methyl)-4',7-bishydroxy-isoflavone-3'-sulfonate
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作者 Ze-Ping Luo Li-Wei Pan +1 位作者 Hai-Lin Chen Jun-Yu Lu 《Drug Combination Therapy》 2019年第4期186-198,共13页
The purpose of this study is to use the newly synthesized molecule Sodium 8-(((carboxymethyl)amino)methyl)-4',7-bishydroxy-isoflavone-3'-sulfonate(M)as a research object,the pharmacological mechanism of the mo... The purpose of this study is to use the newly synthesized molecule Sodium 8-(((carboxymethyl)amino)methyl)-4',7-bishydroxy-isoflavone-3'-sulfonate(M)as a research object,the pharmacological mechanism of the molecule was analyzed by using a series of Systematic pharmacology methods.The results show that the M molecule has a higher drug-like DL value of 0.59 and better molecular property parameters,namely Hdon=4,Hacc=10 and AlogP=0.94;A total of 11 M molecules related targets,namely F2,ESR1,AR,F10,CA2,DPP4,CCNA2,PRSS1,CDK2,GSK3B and PTPN1;A total of 140 diseases are associated with M molecule targets,and these diseases are mainly related to cancer and cardiovascular diseases;A total of 52 pathways involve the pharmacological mechanisms of M molecules,which are mainly related to cancer and other related diseases;GO-enriched analysis showed that these targets are closely related to the regulation of peptidase activity and biological processes such as blood coagulation and hemostasis.This article clearly demonstrated the pharmacological mechanism of M molecule,which provides references for exploring the pharmacological mechanism of new compounds. 展开更多
关键词 sodium 8-(((carboxymethyl)amino)methyl)-4' 7-bishydroxy-isoflavone-3'-sulfonate Systematic PHARMACOLOGY analysis
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Crystal and Molecular Structure, and Spectral Characteristics of Sodium 3,5-Bis(Hydroxyimino)-1-Methyl-2,4,6-Trioxocyclohexanide
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作者 Olga Kovalchukova Nguyen Dinh Do +6 位作者 Adam Stash Vitaly Bel’sky Paul Strashnov Andrew Alafinov Oleg Volyansky Svetlana Strashnova Konstantin Kobrakov 《Crystal Structure Theory and Applications》 2012年第3期46-51,共6页
Sodium 3,5-bis(hydroxyimino)-1-methyl-2,4,6-trioxocyclohexanide C7H5N2NaO5 (I) has been isolated as the only product of the reaction of nitrosation of methylphloroglucinol. The structure of the titled compound has bee... Sodium 3,5-bis(hydroxyimino)-1-methyl-2,4,6-trioxocyclohexanide C7H5N2NaO5 (I) has been isolated as the only product of the reaction of nitrosation of methylphloroglucinol. The structure of the titled compound has been determined from single crystal X-ray diffraction data. The hydrated C7H5N2NaO52.5H2O crystallizes in the monoclinic space group C2/c, with a(?) 16.408(3);b(?) 12.446(3);c(?) 13.716(3);(o) 126.34(3). The planar organic anion exists in a triketo-dihydroxyimino form with the C–O and C–N distances from 1.220(2) to 1.271(2)?? and from 1.292(2) to 1.293?? respectively. In the IR spectrum of I, the sharp absorption band occurred at 1681 cm-1 due to C=O stretching indicating the strong H-interactions. The correlations of theoretical (DFT-B3LYP/aug-cc-pVDZ) and experimental UV-vis absorption spectra in neutral and alkaline ethanolic solutions showed the existence of hydroxyimino-nitroso tautomerism while ionization of I. 展开更多
关键词 sodium 3 5-Bis(Hydroxyimino)-1-Methyl-2 4 6-Trioxocyclohexanide CRYSTAL Structure IR SPECTRA Electronic Absorption SPECTRA Quantum Chemical Modeling
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18β-甘草次酸钠对实验性心律失常的影响 被引量:18
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作者 李新芳 吴勇杰 +1 位作者 郭朝晖 刘莉 《中国中药杂志》 CAS CSCD 北大核心 1992年第3期176-178,共3页
18β-甘草次酸钠对抗氯仿诱发的小鼠室颤、氯仿-肾上腺素所致兔室性心律失常,延长CaCl_2所致大鼠室性心律失常出现时间,减慢大鼠和兔心率,部分对抗异丙肾上腺素的心率加速作用。
关键词 甘草次酸钠 心律失常 心率
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四水合1,1'-二羟基-5,5'-联四唑钠盐的合成、晶体结构及性能 被引量:7
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作者 黄海丰 杨军 +3 位作者 杨普 李晓强 李慧 俞艳 《含能材料》 EI CAS CSCD 北大核心 2014年第4期462-466,共5页
以二氯乙二肟为起始原料,通过一锅法合成了四水合1,1'-二羟基-5,5'-联四唑钠盐(SBTD·4H2O),并用红外、元素分析、扫描电子显微镜对其进行了表征,测试了目标化合物的单晶结构,结果表明其属于三斜晶系,P-1空间群,晶胞参数为a... 以二氯乙二肟为起始原料,通过一锅法合成了四水合1,1'-二羟基-5,5'-联四唑钠盐(SBTD·4H2O),并用红外、元素分析、扫描电子显微镜对其进行了表征,测试了目标化合物的单晶结构,结果表明其属于三斜晶系,P-1空间群,晶胞参数为a=5.6440(11),b=6.4476(17),c=8.303(11),α=100.131(5)°,β=96.789(3)°,γ=112.157(3)°,V=1,Dc=1.761 g·cm-3,F(000)=146,μ(Mo Kα)=0.227 mm-1。采用热重-差示扫描量热联用(TG-DSC)对其进行了热行为分析,在加热速率为10 K·min-1的条件下,该化合物从83.9℃开始失去结晶水,368.1℃开始分解,分解峰值温度为398.6℃,热稳定性良好。依据GJB772A-1997对SBT D·4H2O的感度进行了测试,撞击感度H50>100 cm,摩擦感度为0%,这表明其对机械撞击和摩擦不敏感。 展开更多
关键词 应用化学 四水合1 1'-二羟基-5 5'-联四唑钠盐(SBTD·4H2O) 热分解 晶体结构 感度 sodium 5 5'-bistetrazole-1 1'-diolate tetrahedrate (SBTD·4H2O)
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FDP对病毒性脑炎患儿脑脊液中NSE、TNF-α水平的影响及其临床意义 被引量:3
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作者 戚拥军 黄慧桃 李昶 《齐齐哈尔医学院学报》 2008年第11期1283-1284,共2页
目的本研究力争通过予重症病毒性脑炎患儿FDP的应用与否,判定其对脑脊液中NSE、TNF-α水平的影响,来评价FDP应用于病毒性脑炎治疗的临床意义。方法将病毒性脑炎患儿随机地分配号分为治疗组和对照组,除基础治疗外,治疗组立即加用FDP15天... 目的本研究力争通过予重症病毒性脑炎患儿FDP的应用与否,判定其对脑脊液中NSE、TNF-α水平的影响,来评价FDP应用于病毒性脑炎治疗的临床意义。方法将病毒性脑炎患儿随机地分配号分为治疗组和对照组,除基础治疗外,治疗组立即加用FDP15天,与对照组分别测量治疗前后脑脊液中NSE、TNF-α水平。均采取酶联免疫吸附法(ELISA)测定。结果两组治疗前脑脊液NSE、TNF-α水平平均明显升高两组间相比无统计学意义,两组自身前后比较NSE、TNF-α水平有显著性差异(P<0.01),治疗后两组中两项指标相比亦有统计学意义(P<0.05)。结论FDP对病脑患儿治疗前后脑脊液中NSE、TNF-α水平变化有统计学意义及临床应用意义。 展开更多
关键词 病毒性脑炎 脑脊液 肿瘤坏死因子α 神经元特异性烯醇酶(NSE) 1 6-二磷酸果糖三钠盐(Fructose sodium Diphosate FDP)
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PPAR -γ激动剂对 LPS 诱导的小鼠 ARDS 肺泡上皮钠通道-γ亚基的调控
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作者 叶媛 何婧 +2 位作者 戚迪 冯龙华 王导新 《中国急救医学》 CAS CSCD 北大核心 2014年第8期729-733,I0001,共6页
目的:探讨过氧化物酶增殖体活化受体-γ( PPAR-γ)激动剂对LPS诱导的小鼠ARDS的保护作用及其对肺泡上皮细胞钠通道-γ亚基( ENaC-γ)的调控作用。方法40只雄性BALB/C小鼠随机分为对照组( Control组)、模型组( LPS组)、罗格列... 目的:探讨过氧化物酶增殖体活化受体-γ( PPAR-γ)激动剂对LPS诱导的小鼠ARDS的保护作用及其对肺泡上皮细胞钠通道-γ亚基( ENaC-γ)的调控作用。方法40只雄性BALB/C小鼠随机分为对照组( Control组)、模型组( LPS组)、罗格列酮治疗组( RGZ组,LPS+罗格列酮)及GW9662干预组( GW9662组,LPS+GW9662+罗格列酮),每组10只。处理后收集相关标本,ELISA测定肺泡灌洗液( BALF)中IL-1β和TNF-α水平。肺组织湿/干比( W/D)测定肺水肿程度。 HE染色观察肺组织病理变化并进行肺组织损伤评分。用免疫组织化学法和Western blot测定肺组织ENaC-γ蛋白的表达。 RT-PCR测定ENaC-γmRNA的表达。结果与Control组比较,LPS组、RGZ组和GW9662组中IL-1β和TNF-α水平、W/D值、HE染色肺组织损伤程度及评分明显升高( P<0.05);与LPS组比较,RGZ组各指标水平及肺损伤评分明显下降(P<0.05),但LPS组和GW9662组比较差异无统计学意义(P>0.05)。 LPS造模后,LPS组(210±15IOD,0.18±0.02,0.22±0.04)、RGZ组(450±30IOD,0.43±0.03,0.45±0.03)、GW9662组(235±35IOD,0.21±0.03,0.25±0.02)肺组织ENaC-γ蛋白和mRNA的表达明显低于Control组(600±25IOD,0.64±0.01,0.67±0.02,P<0.05),RGZ组与LPS组和GW9662比较差异有统计学意义(P<0.05),但LPS组和GW9662组比较差异无统计学意义(P>0.05)。结论 PPAR-γ受体激动剂可能从转录水平上调肺泡ENaC-γ的表达,从而减轻LPS诱导的小鼠ARDS肺水肿程度,发挥保护性作用。 展开更多
关键词 过氧化物酶增殖体活化受体-γ(PPAR-γ) 罗格列酮 急性呼吸窘迫综合征(ARDS) 上皮细胞钠通道(ENaC) Peroxisome proliferator activated receptor -γ(PPAR-γ) Acute respiratory distress syndrome (ARDS) Epithelial sodium channel (ENaC)
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18β-甘草次酸钠对小鼠腹腔巨噬细胞摄取氧化型低密度脂蛋白的影响及其作用机制研究 被引量:5
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作者 陈惠玲 唐富天 冯光 《中国药房》 CAS CSCD 北大核心 2006年第20期1534-1537,共4页
目的:观察18β-甘草次酸钠(β-SG)对体外培养的小鼠腹腔巨噬细胞摄取氧化型低密度脂蛋白(oxLDL)的影响,并探讨其可能的作用机制。方法:收集并培养小鼠腹腔巨噬细胞,分为对照组、oxLDL组及oxLDL+β-SG(1、10、100μmol/L)组,经oxLDL(除... 目的:观察18β-甘草次酸钠(β-SG)对体外培养的小鼠腹腔巨噬细胞摄取氧化型低密度脂蛋白(oxLDL)的影响,并探讨其可能的作用机制。方法:收集并培养小鼠腹腔巨噬细胞,分为对照组、oxLDL组及oxLDL+β-SG(1、10、100μmol/L)组,经oxLDL(除对照组外)作用后测定细胞内总胆固醇(TC)、游离胆固醇(FC)、胆固醇酯(CE)含量,观察不同浓度β-SG对巨噬细胞摄取oxLDL的影响;同时,测定细胞内丙二醛(MDA)的含量和超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-PX)的活性。结果:oxLDL能显著增加巨噬细胞内TC、CE的含量,而预先加入β-SG的oxLDL组能剂量依赖性地抑制细胞内TC、CE含量的升高(P<0.01或P<0.05),FC各组无显著性差异(P>0.05);与oxLDL组比较,oxLDL+β-SG各组还能减少细胞内MDA含量,增加SOD和GSH-PX活性(P<0.01或P<0.05)。结论:β-SG能显著抑制体外培养的小鼠腹腔巨噬细胞对oxLDL的摄取,此作用可能与其能提高巨噬细胞的抗氧化能力有关。 展开更多
关键词 18β-甘草次酸钠 小鼠 腹腔巨噬细胞 氧化型低密度脂蛋白
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OBSERVATION OF THE EFFECT OF S-(-)USNIC ACID SODIUM ON TRICHOMONAS VAGINALIS BY TRANSMISSION ELECTRON MICROSCOPE 被引量:1
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作者 吴杰 张敏如 +2 位作者 丁东宁 谭廷华 闫宝琦 《Journal of Pharmaceutical Analysis》 CAS 1994年第1期56-59,共4页
This paper reports the ultrastructural changes of trichomonas vaginaiis (T. vag. ) under the action of s-(-)usnic acid sodium in vitro. These changes can be shown by the following results:At first, the degranulation o... This paper reports the ultrastructural changes of trichomonas vaginaiis (T. vag. ) under the action of s-(-)usnic acid sodium in vitro. These changes can be shown by the following results:At first, the degranulation of the rough endoplasmic reticulum (RER) took place, the polyribosomes disaggregated. And then, the Golgi complex and the endoplasmic reticulum dilated. The cytoplasmic matrix presented and inhomogeneous apperance. Finally, the biomembrane loosed and fractured.The cell nuclei presented the karyorrhexis. 展开更多
关键词 s-(-)usnic acid sodium trichomonas vaginalis (T. vag. ) ULTRASTRUCTURE transmission electron microscope (TEM)
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甘草酸二铵与复方甘草酸单铵S氯化钠治疗药源性肝损害的成本-效益分析
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作者 陶丽萍 《海峡药学》 2012年第10期251-253,共3页
目的比较甘草酸二铵与复方甘草酸单铵S氯化钠治疗药源性肝损害的疗效及经济性,进行成本-效益分析。方法将64例患者随机分成两组:A组(甘草酸二铵注射液),B组(复方甘草酸单铵S氯化钠注射液)。结果 A、B两组的成本-效益比值分别为2.25元、7... 目的比较甘草酸二铵与复方甘草酸单铵S氯化钠治疗药源性肝损害的疗效及经济性,进行成本-效益分析。方法将64例患者随机分成两组:A组(甘草酸二铵注射液),B组(复方甘草酸单铵S氯化钠注射液)。结果 A、B两组的成本-效益比值分别为2.25元、7.88元。结论甘草酸二铵注射液治疗药源性肝损害更有效、更经济。 展开更多
关键词 甘草酸二铵注射液 复方甘草酸单铵S氯化钠注射液 药源性肝损害 成本-效益分析
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Comparative effects of α2δ-1 ligands in mouse models of colonic hypersensitivity
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作者 Mathieu Meleine Ludivine Boudieu +8 位作者 Agathe Gelot Emilie Muller Amandine Lashermes Julien Matricon Celine Silberberg Vassilia Theodorou Alain Eschalier Denis Ardid Frederic A Carvalho 《World Journal of Gastroenterology》 SCIE CAS 2016年第31期7111-7123,共13页
AIM: To investigate anti-hypersensitive effects of α2δ-1 ligands in non-inflammatory and inflammationassociated colonic hypersensitivity(CHS) mouse models.METHODS: To induce an inflammation-associated CHS, 1% dextra... AIM: To investigate anti-hypersensitive effects of α2δ-1 ligands in non-inflammatory and inflammationassociated colonic hypersensitivity(CHS) mouse models.METHODS: To induce an inflammation-associated CHS, 1% dextran sulfate sodium(DSS) was administered to C57Bl/6J male mice, in drinking water, for 14 d. Regarding the non-inflammatory neonatal maternal separation(NMS)-induced CHS model, wild-type C57BI/6J pups were isolated from their mother from day 2 to day 14(P2 to P14), three hours per day(from 9:00 a.m. to 12:00 p.m.). Colorectal distension was performed by inflating distension probe from 20 μL to 100 μL by 20 μL increment step every 10 s. After a first colorectal distension(CRD), drugs were administered subcutaneously, in a cumulative manner,(Gabapentin at 30 mg/kg and 100 mg/kg; Pregabalin at 10 mg/kg and 30 mg/kg; Carbamazepine at 10 mg/kg and 30 mg/kg) and a second CRD was performed one hour after each injection.RESULTS: The visceromotor response(VMR) to CRD was increased by our NMS paradigm protocol in comparison to non-handled(NH) mice, considering the highest distension volumes(80 μL: 0.783 ± 0.056 mV /s vs 0.531 ± 0.034 m V/s, P < 0.05 and 100 μL: 1.087 ± 0.056 m V/s vs 0.634 ± 0.038 m V/s, P < 0.05 for NMS and NH mice, respectively). In the inflammationassociated CHS, DSS-treated mice showed a dramatic and significant increase in VMR at 60 and 80 μL distension volumes when compared to control mice(60 μL: 0.920 ± 0.079 m V/s vs 0.426 ± 0.100 m V/s P < 0.05 and 80 μL: 1.193 ± 0.097 mV /s vs 0.681 ± 0.094 mV /s P < 0.05 for DSS- and Water-treated mice, respectively). Carbamazepine failed to significantly reduce CHS in both models. Gabapentin significantly reduced CHS in the DSS-induced model for both subcutaneous injections at 30 or 100 mg/kg. Pregabalin s i g n i f i c a n t l y r e d u c e d V M R t o C R D i n t h e n o n-inflammatory NMS-induced CHS model for the acute subcutaneous administration of the highest cumulative dose(30 mg/kg) and significantly reduced CHS in lowdose DSS-treated mice in a dose-dependent manner. Finally, the percent decrease of AUC induced by acute GBP or Pregabalin treatment were higher in the inflammatory DSS-induced CHS model in comparison to the non-inflammatory NMS-induced CHS model.CONCLUSION: This preclinical study demonstrates α2δ-1 ligands efficacy on inflammation-associated CHS, highlighting their potential clinical interest in patients with chronic abdominal pain and moderate intestinal inflammation. 展开更多
关键词 NEONATAL maternal separation DEXTRAN sulfate sodium COLONIC HYPERSENSITIVITY mouse models Colorectal DISTENSION α2δ-1 LIGANDS
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Preparation of Single Phase Na-X Zeolite from Oil Shale Ash by Melting Hydrothermal Method
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作者 TONG Lingxin LUO Huaming +1 位作者 ZHANG Lin ZHAN Huasheng 《China's Refractories》 CAS 2014年第2期12-17,共6页
A single phrase Na - X zeolite was synthesized from pretreated oil shale ash by alkaline fusion and hydrotherreal treatment. Eff3cts of the NaOH concentration, crystallization time ant temperature on the formation of ... A single phrase Na - X zeolite was synthesized from pretreated oil shale ash by alkaline fusion and hydrotherreal treatment. Eff3cts of the NaOH concentration, crystallization time ant temperature on the formation of Na-X zeolite were studied in detail. The single phase Na- X zeolite powders can. be prepared by alkaline fusion o.f pretreated oil shale ash at 600 ℃ .for 1 h, and crystalli-zation at 80 - 100 ℃ .for 8 - 10 h with NaOH concentration of 3 -3. 5 tool · L-1. Na - A zeolite appears when decreasing NaOH concentration, crystallization time or temperature, ant an unnamed zeolite emerges when prolonging crystallization time or raising crystalli-zation, temperature. SEM micrographs suggest that the aggregates of Na-X zeolite particles have perfect dispersity and uniform granular with about 1.5 μm in size, and most of the Na-X zeolite crystals display a regular octahedral structure with the size of about 500 nm. The specific surface area of the powders with single Na-X zeolite phase reaches the maximum value of 488. 163 2 m2· g -1, larger than that of multiple zeolite powders. 展开更多
关键词 sodium - X zeolite oil shale ash alka-line fusion hydrothermal synthesis
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Synthesis of Intermediate N-Chloroformyl-N-[4-(trifluoromethoxy)phenyl]Methyl Carbamate of Indoxacarb
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作者 Zhang Zhenming Kong Xianbin +2 位作者 Wang Gang Wang Xiaohui Liu Minjin 《Plant Diseases and Pests》 CAS 2020年第1期36-40,共5页
[Objective]The paper was to study a synthetic method suitable for industrial production of intermediate N-Chloroformyl-N-[4-(trifluoromethoxy)phenyl]methyl carbamate of indoxacarb.[Method]Using 4-trifluoromethoxy anil... [Objective]The paper was to study a synthetic method suitable for industrial production of intermediate N-Chloroformyl-N-[4-(trifluoromethoxy)phenyl]methyl carbamate of indoxacarb.[Method]Using 4-trifluoromethoxy aniline as the starting material,[4-(trifluoromethoxy)phenyl]carbamate was synthesized by homogeneous formylation method without acid-binding agent.Subsequently,it was reacted with sodium methoxide/potassium methoxide by reactive distillation to obtain[4-(trifluoromethoxy)phenyl]carbamate ammonium sodium/potassium,then directly reacted with triphosgene to obtain crude products of N-carbonochloridoyl-N-[4-(trifluoromethoxy)phenyl]carbamate;finally,competing product was obtained by recrystallization.[Result]The intermediate N-chloroformyl-N-[4-(trifluoromethoxy)phenyl]carbamate was synthesized by the method.The content of products was higher than 98%.The yield of product reached above 96%(calculated by 4-trifluoromethoxy aniline).[Conclusion]The method used for the synthesis of intermediate N-chloroformyl-N-[4-(trifluoromethoxy)phenyl]methyl carbamate was simple,with less three wastes,higher safety and lower cost. 展开更多
关键词 INDOXACARB INTERMEDIATE N-chloroformyl-N-[4-(trifluoromethoxy)phenyl]methyl CARBAMATE Synthesis sodium/potassium ammonium salt FORMYLATION Recrystallization
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One-Pot Three-Component Synthesis of N-Arylmethyl-4-(7-cyclohepta-1,3,5-trienyl)anilines
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作者 Lidia P. Yunnikova Tatiana A. Akentieva Tatiana V. Makhova 《International Journal of Organic Chemistry》 2013年第2期148-150,共3页
We report a one-pot three-component synthesis of N-arylmethyl-4-(7-cyclohepta-1,3,5-trienyl)anilines by using various aromatic imines, tropylium tetrafluoroborate, and sodium tetrahydroborate in the presence of imidaz... We report a one-pot three-component synthesis of N-arylmethyl-4-(7-cyclohepta-1,3,5-trienyl)anilines by using various aromatic imines, tropylium tetrafluoroborate, and sodium tetrahydroborate in the presence of imidazole as activator. 展开更多
关键词 Imines TROPYLIUM TETRAFLUOROBORATE sodium TETRAHYDROBORATE N-Arylmethyl-4-(7-cyclohepta-1 3 5-trienyl)anilines
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The Releasing Effects of Captopril and Sodiun Nitroprusside on Endothelin-1 in Vascular Smooth Muscle Cell
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作者 丛洪良 黄体钢 +4 位作者 周丽娟 宋昱 马向虹 王伟 刘洪梅 《South China Journal of Cardiology》 CAS 2001年第1期49-51,共3页
Objective To investigate the influence of captoprial and SNP on the release of ET -1 in cultured VSMC of rats. Methods Measurement of endothelin - 1 levels by radioimmljnoassay in various concentrations of captopril a... Objective To investigate the influence of captoprial and SNP on the release of ET -1 in cultured VSMC of rats. Methods Measurement of endothelin - 1 levels by radioimmljnoassay in various concentrations of captopril and/or sodium nitroprusside in cultured vascular smooth muscle cell (VSMC) of rats. Results Both captopril and SNP could reduce the high ET - 1 levels of VSMC which were caused by Ang Ⅱ. There was a linear relationship between Ang Ⅱlevels and ET -1 production ( r = 0. 760, P <0. 001 ) . Conclusion Endothelin - 1 may accelerate the formation and development of atherosclerosis through inhibiting endogenous NO production by VSMC. ACEI or NO inhibition of ET -1 release could reduce atherosclerosis formation. 展开更多
关键词 captorpil sodium nitroprusside endothelin - 1 nitric oxide VSMC
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氨基酸与钠离子非共价键相互作用的电喷雾质谱研究 被引量:3
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作者 吴胜明 杨松成 +6 位作者 王杰 王鸿丽 刘炳玉 李爱玲 何昆 魏开华 张学敏 《分析测试学报》 CAS CSCD 北大核心 2004年第z1期66-67,共2页
  实验研究中常常观察到钠离子与一些多肽或蛋白质有较强的非共价键结合能力,这种非共价键相互作用可能与生物的一些功能和活性有关.为了进一步了解这一结合作用,我们应用电喷雾质谱研究了常见的20种氨基酸与钠离子在溶液中的非共价...   实验研究中常常观察到钠离子与一些多肽或蛋白质有较强的非共价键结合能力,这种非共价键相互作用可能与生物的一些功能和活性有关.为了进一步了解这一结合作用,我们应用电喷雾质谱研究了常见的20种氨基酸与钠离子在溶液中的非共价键相互作用.实验研究中发现脯氨酸和苯丙胺酸与钠离子有较强的非共价键结合能力.…… 展开更多
关键词 sodium ion Amino acids Non - covalent interaction ESI - MS
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煮制时间对鹅肉蛋白结构的影响 被引量:12
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作者 陈春梅 周惠健 +5 位作者 沈银涵 陆辰燕 刘瑞 于海 席军 林广桃 《食品工业科技》 CAS 北大核心 2021年第4期6-11,共6页
为了探究煮制对鹅肉蛋白的影响,本文通过测定不同煮制时间(0、30、60、90、120 min)下鹅肉的蒸煮损失率、剪切力、蛋白电泳、肌原纤维小片化指数(myofibril fragmentation index,MFI)、游离氨基酸(free amino acid,FAA)构成及微观结构... 为了探究煮制对鹅肉蛋白的影响,本文通过测定不同煮制时间(0、30、60、90、120 min)下鹅肉的蒸煮损失率、剪切力、蛋白电泳、肌原纤维小片化指数(myofibril fragmentation index,MFI)、游离氨基酸(free amino acid,FAA)构成及微观结构研究了煮制时间对鹅肉蛋白结构特性的影响。结果表明:蒸煮损失率随着煮制时间的延长而升高,由0 min处的27.5%升高到120 min处的39.0%;剪切力值则是随着煮制时间的延长而呈现先上升再下降的趋势,且在90 min时出现最低值;十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(sodium dodecyl sulfate-polyacrylamide gel electrophoresis,SDS-PAGE)图谱显示,随着煮制时间的延长35~55 kDa处的条带逐渐变浅变细,10~15 kDa处条带随煮制时间延长颜色变深;MFI值随着煮制时间的延长显著增加(P<0.05),煮制120 min时的MFI值约为处理0 min时的2倍;共检出三种呈味氨基酸,从总量看,苦味氨基酸的含量最多,甜味氨基酸含量次之,鲜味氨基酸含量最少。煮制过程中,这三类氨基酸总含量总体表现为随煮制时间的延长而增加的趋势(甜味氨基酸的总含量约增加了2.5倍,苦味氨基酸的总含量约增加了3.1倍,鲜味氨基酸的总含量约增加了3.4倍),而甲硫氨酸和半胱氨酸这两者的含量随煮制时间的延长而减少;扫描电镜(scanning electron microscope,SEM)图中发现肌纤维之间的空隙表现出先变大后减小到粘成一块。同时,肌纤维和肌束膜结构的完整程度随着煮制时间的延长逐步破坏,最终导致部分肌纤维束发生崩塌使它们相互黏成一块。因此,鹅肉在蒸煮过程中,其蛋白组成和含量、MFI值、游离氨基酸组成及微观结构会因时间变化而发生改变,从而影响了鹅肉蛋白结构的变化。研究表明,90 min为鹅肉的最佳煮制时间。 展开更多
关键词 煮制时间 十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(sodium dodecyl sulfate-polyacrylamide gel ELECTROPHORESIS SDS-PAGE) 肌原纤维小片化指数(myofibril fragmentation index MFI) 游离氨基酸 微观结构
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