检索结果-南通市图书馆

Crystal Structure of ethanolamine 5-Nitrosalicylic Acid Organic Adduct

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2004年第12期23卷 1338-1341页

作者：金轶车云霞魏荣敏郑吉民 Department of Chemistry Nankai University Tianjin 300071 China

The title adduct (C18H24N4O12, Mr = 488.41) crystallizes in monoclinic, space group P21/c with a = 4.0514(19), b = 25.193(11), c = 10.751(5) ?, β = 95.070(8)o, V = 1093.0(9) ?3, Z = 4, Dc = 1.484 g/cm3, F(000) = 512, μ(MoKα) = 1.26 cm-1, T = 293 K, the final R = 0.0593 and wR = 0.0862 for 956 observed reflections with I > 2σ(I). The compound is a 1:1 adduct of ethanolamine and 5-nitrosalicylic acid. The nitrogen atom of ethanolamine is protonated. In this crystal there exist a number of hydrogen bonds which link the ethanolamine and 5-nitrosalicylic acid molecules to form a three-dimensional infinite network structure.

关键词： ethanolamine 5-nitrosalicylic acid hydrogen bonds crystal structure non-linear optical

Combustion synthesis and stability of nanocrystalline La_2O_3 via ethanolamine-nitrate process

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2012年第1期30卷 48-52页

作者： LONG Yulin YANG Jun LI Xiaoci HUANG Weiya TANG Yu ZHANG Yuanming Department of Chemistry Jinan UniversityGuangzhou 510632China

Pure nanocrystalline La2O3 powders were successfully prepared by the combustion *** effect of ethanolamine-to-nitrate ratio on phase composition and crystallite size of the combustion products was systematically *** hexagonal La2O3 powders were almost formed in stoichiometric reaction（ψ=1.15）,while metallic La phase was obtained in fuel-rich conditions（ψ≥3.0）.The as-synthesized hexagonal La2O3 was found to be chemically unstable in ambient air since a complete transformation to hexagonal La（OH）3 was detected after 24 h exposure to *** resulting hexagonal La（OH）3 showed an excellent ability to remove water pollutant and could nearly remove 100% of the Congo red at room temperature with a removal capacity of 143.5 mg Congo red/*** phosphate adsorption data on hexagonal La（OH）3 agreed well with the Langmuir model with the estimated maximum adsorption capacity of 57.8 mg/g.

关键词： oxides combustion synthesis X-ray diffraction ethanolamine rare earths

Protective Effect of ethanolamine on Hepatic Preneoplastic Alterations Induced by the Administration of <i>N</i>-Nitrosodiethylamine in Rats

在线全文

学校读者我要写书评

暂无评论

Food and Nutrition Sciences 2017年第10期8卷 936-945页

作者： Hajime Sasaki Department of Nutrition and Life Sciences Kanagawa Institute of Technology Atsugi Japan Nutritional Research Department Food Science Research Laboratories Meiji Co. Ltd. Odawara Japan

The effects of exogenously administered ethanolamine (Etn) on the N-nitrosodiethylamine (NDA)-induced formation of hepatic lesions in rats were investigated. Sprague-Dawley rats were intraperitoneally administered NDA (100 mg/kg body weight) at 7-day intervals, and the animals were allowed free access to water containing Etn (15 or 50 mg/L) for 35 days. NDA-induced hepatic lesions were assessed according to the number of nodules detectable on the liver surface, areas of clear cell foci observed on histopathological thin sections, hydroxyproline levels in liver homogenates, and blood biochemical marker levels. Compared with those from control rats that were not administered Etn, livers from Etn-exposed rats had significantly fewer surface nodules and smaller areas of clear cell foci, indicating that Etn prevented or delayed the formation of preneoplastic cell alterations. Hydroxyproline levels in livers were significantly lower in Etn-treated rats, indicating that the chemical prevented the formation of fibrotic alterations. The protective effects of Etn on NDA-induced hepatic lesions were demonstrated by changes in blood biochemical marker levels. These results suggest that Etn can protect against cellular alterations induced by a carcinogenic chemical, possibly by enhancing hepatic phospholipid synthesis.

关键词： ethanolamine N-Nitrosodiethylamine Protection Hepatic lesion Cellular Alterations

Studies of Oxide Layers Grown at 260°C on A106 B Carbon Steel in Aqueous Medium with ethanolamine or Morpholine

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Materials Sciences and Applications 2015年第9期6卷 783-791页

作者： Ana Maria Olmedo Roberto Bordoni Centro Atómico Constituyentes Comisión Nacional de Energía Atómica (CNEA) Buenos Aires Argentina Retired from CNEA Buenos Aires Argentina

The water chemistry of the secondary coolant in the majority of Nuclear Power Plants is controlled by AVT (All Volatile Treatment), wherein volatile amines are used to maintain the alkaline pH required for minimizing the corrosion of structural materials which one of them is Carbon Steel. In this treatment, ammonia, morpholine and ethanolamine are commonly used as conditioning reagents. In this context, experiments were carried out by exposing carbon steel A106 B samples in a simulated secondary coolant in order to study the nature of the oxide films. The tests were performed in a static autoclave at 260°C using two media: I) hydrazine + morpholine and II) hydrazine + ethanolamine during different exposure periods up to ≈1020 h. The oxide film characterization was mainly studied using Scanning Electron Microscopy and X-ray diffraction. A chemical descaling procedure was used to obtain the material weight loss (W) of samples, the adherent and released oxide. The XRD analyses, for all exposures studied, showed that magnetite was the corrosion product formed in the films grown in both media. The material weight loss, after descaling, could be fitted by a law of the type W = ktn, up to 1020 h of exposure tested, resulting in n = 0.42, k = 6.24 for films grown in medium I) and n = 0.39, k = 6.08 for films grown in medium II) respectively (W is in mg/dm2 and t in h). The higher corrosion product release measured in the medium with morpholine could be important in power plant operation.

关键词： Morpholine ethanolamine Corrosion Oxide Carbon Steel

PROPERTIES OF ethanolamine USED IN THE SECONDARY CIRCUIT OF PWR

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

PROPERTIES OF ETHANOLAMINE USED IN THE SECONDARY CIRCUIT OF ...

乙醇胺可作为血糖控制良好的糖尿病患者发生糖尿病视网膜病变的潜在生物标志物和基于生物标志物的防治策略

武汉大学第九届研究生学术科技节系列活动之“第八届湖北省...

作者： Rui Wang School of Power and Mechanical Engineering Wuhan University

Not only ethanolamine(ETA)’s capability to ajust p H value,but also its compatibility with the secondary circuit materials should be considered when ETA used in the secondary circuit of the pressurized water reactor(PWR).ETA has been used to ajust p H value of the secondary circuit water in the United States of America(U.S.A)since *** to the China long-term development plan about nuclear power(2005020),the introduction third-generation PWR AP1000 with ETA used in the secondary circuit from *** one of the technical development *** the summarizing the basic properties of ETA,the capability of ETA to adjust the p H value of demineralized water is compared with ammonia’s through the theoretical calculation and experimental determination,and the inhibition effect of ETA and ammonia on 20carbon steel in secondary circuit of the PWR is studied by static coupon tests in *** research results showed as follow:(1)When the theoretical p H is 9.5 or 9.7,the p H value of ETA solution is higher than that of ammonia solution,and the consumption of ETA is lower than that of ammoni a,and the electrical conductivity of ETA solution is lower than that of ammonia solution.(2)When the experimental solution’s p H value is 9.5 or 9.8,and the temperature is 40℃or 170℃or 250℃,the corrosion rate of 20 carbon steel with ETA to adjust p H value is lower than that with ammonia to adjust p H ***,ETA’s capability to ajust the demineralized water’s p H value and prevent 20 carbon steel from corrosion is better than that of ammonia.

关键词： PWR secondary circuit ethanolamine p H corrosion

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Science Bulletin 2024年第12期69卷 1920-1935页

作者：胡光奕顾丽萍王若男菅启智吕康甲夏梦雪赖梦宇申婷婷胡敬杨森叶存奇张筱楠王育璠许迅张芳 National Clinical Research Center for Eye Diseases Department of OphthalmologyShanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China Department of Endocrinology and Metabolism Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China Eye Institute of Shanghai Jiao Tong University School Shanghai 200080China Shanghai Key Laboratory of Fundus Diseases Shanghai 200080China Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases Shanghai 200080China Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology Life Sciences InstituteZhejiang UniversityHangzhou 310058China Kidney Disease Center The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Diabetic retinopathy(DR)is the leading cause of blindness among the working-age *** controlling blood glucose levels effectively reduces the incidence and development of DR to less than 50%,there are currently no diagnostic biomarkers or effective treatments for DR development in glucose-wellcontrolled diabetic patients(GW-DR).In this study,we established a prospective GW-DR cohort by strictly adhering to glycemic control guidelines and maintaining regular retinal examinations over a median 2-year follow-up *** discovery cohort encompassed 71 individuals selected from a pool of 292 recruited diabetic patients at baseline,all of whom consistently maintained hemoglobin A1c(HbA1c)levels below 7%without experiencing *** this cohort of 71 individuals,21 subsequently experienced new-onset GW-DR,resulting in an incidence rate of 29.6%.In the validation cohort,we also observed a significant GW-DR incidence rate of 17.9%.Employing targeted metabolomics,we investigated the metabolic characteristics of serum in GW-DR,revealing a significant association between lower levels of ethanolamine and GW-DR *** association was corroborated in the validation cohort,exhibiting superior diagnostic performance in distinguishing GW-DR from diabetes compared to the conventional risk factor HbA1c,with AUCs of 0.954 versus 0.506 and 0.906 versus 0.521 in the discovery and validation cohorts,***,in a streptozotocin(STZ)-induced diabetic rat model,ethanolamine attenuated diabetic retinal inflammation,accompanied by suppression of microglial diacylglycerol(DAG)-dependent protein kinase C(PKC)pathway *** conclusion,we propose that ethanolamine is a potential biomarker and represents a viable biomarker-based therapeutic option for GW-DR.

关键词： Glucose-well-controlled diabetic patients Diabetic retinopathy Biomarker HbA1c ethanolamine Biomarker-based treatment

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

在线全文

学校读者我要写书评

暂无评论

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

Emergency balloon-occluded retrograde transvenous obliteration of ruptured gastric varices

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2013年第31期19卷 5125-5130页

作者： Tetsuo Sonomura Wataru Ono Morio Sato Shinya Sahara Kouhei Nakata Hiroki Sanda Nobuyuki Kawai Hiroki Minamiguchi Motoki Nakai Kazushi Kishi Department of Radiology Wakayama Medical University Wakayama 641-8510 Japan Department of Gastroenterology Kishiwada Tokushukai Hospital Kishiwada 596-8522 Japan Department of Radiology Kishiwada Tokushukai Hospital Kishiwada 596-8522 Japan

AIM: To evaluate the effectiveness and safety of emergency balloon-occluded retrograde transvenous obliteration(BRTO) for ruptured gastric ***: Emergency BRTO was performed in 17 patients with gastric varices and gastrorenal or gastrocaval shunts within 24 h of hematemesis and/or tarry *** gastric varices were confirmed by endoscopy,and the gastrorenal or gastrocaval shunts were identified by contrast-enhanced computed tomography(CE-CT).A 6-Fr balloon catheter(Cobra type) was inserted into the gastrorenal shunt via the right internal jugular vein,or into the gastrocaval shunt via the right femoral vein,depending on the varices drainage *** sclerosant,5% ethanolamine oleate iopamidol,was injected into the gastric varices through the catheter during balloon *** patients with incom plete thrombosis of the varices after the first BRTO,a second BRTO was performed the following *** were followed up by endoscopy and CE-CT at 1 d,1 wk,and 1,3 and 6 mo after the procedure,and every 6 mo ***: Complete thrombosis of the gastric varices was not achieved with the first BRTO in 7/17 patients because of large gastric *** patients underwent a second BRTO on the next day,and additional sclerosant was injected through the *** thrombosis which led to disappearance of the varices was achieved in 16/17 patients,while the remaining patient had incomplete thrombosis of the *** of the patients experienced rebleeding or recurrence of the gastric varices after a median follow-up of 1130 d(range 8-2739 d).No major complications occurred after the ***,esophageal varices worsened in 5/17 patients after a mean follow-up of 8.6 ***: Emergency BRTO is an effective and safe treatment for ruptured gastric varices.

关键词： Emergency balloon-occluded retrograde transvenous obliteration Gastric varices Bleeding Portal hypertension ethanolamine oleate

Interface and bulk controlled perovskite nanocrystal growth for high brightness light-emitting diodes [Invited]

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2021年第3期19卷 1-7页

作者： Le Jiang Xi Luo Zhongming Luo Dingjian Zhou Baoxing Liu Jincheng Huang Jianfeng Zhang Xulin Zhang Ping Xu Guijun Li College of Electronics and Information Engineering Shenzhen UniversityShenzhen 518060China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China

Halide perovskites have attracted great attention due to their high color purity, high luminance yield, low non-radiative recombination rate, and solution processability. Although the external quantum efficiency of perovskite light-emitting diodes(Pe LEDs) is comparable with that of the organic light-emitting diodes(OLEDs) and quantum-dots light-emitting diodes(QLEDs), the brightness is still low compared with the traditional OLEDs and QLEDs. Herein, we demonstrate high brightness and high-efficiency Cs Pb Br3-based Pe LEDs using interface and bulk controlled nanocrystal growth of the perovskite emission layer. The interface engineering by ethanolamine and bulk engineering by polyethylene glycol led to highly crystallized and cubic-shaped perovskite nanocrystals with smooth and compact morphology. As a result, Pe LEDs with a high brightness of 64756 cd/m2 and an external quantum efficiency of 13.4% have been achieved.

关键词： perovskite light-emitting diodes morphology engineering ethanolamine polyethylene glycol