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How Do Commercial Children’s Foods Influence Their Growth and Development? A Map of Commercially Available Children’s Foods in Honduras 预览
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作者 Adriana Santana Hernández Sofía Raquel Mejía Moti?o +1 位作者 Adriana Beatriz Di Iorio Cindy Mérida 《食品与营养科学(英文)》 2019年第2期174-187,共14页
Background: The premature consumption of processed foods with high sugar and sodium content over the course of life has been associated with an increased risk of suffering from chronic diseases starting in adolescence... Background: The premature consumption of processed foods with high sugar and sodium content over the course of life has been associated with an increased risk of suffering from chronic diseases starting in adolescence or early adulthood. Methods: There was an examination of the nutritional labelling of processed products for young children (n = 140) available in the Honduran market to evaluate their nutritional quality with regard to sodium and sugar content, pursuant to various international recommendations. Results: 54% of the products evaluated derive more than 20% of their calories from sugar. The categories that to a large degree exceed the recommended sugar content range are fruit drinks (80%) and dessert purees (65%). The average price per product serving is lower than one US dollar ($0.81). 46% and 6% of the products place sugar and salt, respectively, among the first five positions in their ingredient lists. Conclusions: Processed foods for infants and young children generally exceed the recommended sugar content, but due to their low cost and easy access, they are displacing traditional food consumption, contributing to increasing childhood obesity and chronic disease in the early stages of life. 展开更多
关键词 Fast FOODS SUGAR INFANT Children SODIUM
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Are Functional Foods Marketed in Honduras a Healthy Option? 预览
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作者 Adriana Hernández Santana Sofía Raquel Mejía Moti?o Adriana B. Di Iorio 《食品与营养科学(英文)》 2019年第7期719-734,共16页
Background: Functional foods have been proposed as vehicles to prevent diseases in response to disease increase throughout the world. Methods: Descriptive cross-sectional study. The nutritional labeling of processed f... Background: Functional foods have been proposed as vehicles to prevent diseases in response to disease increase throughout the world. Methods: Descriptive cross-sectional study. The nutritional labeling of processed functional foods (PFF) commercially available in Honduras was examined to consider health benefits based on functionality according to the Central American Technical Regulation (CATR) and critical nutrient content according to the profile of the Panamerican Health Organization (PAHO). Results: Out of a national sample of 631 commercial processed foods (CPF), 144 were defined as functional;sweetened and flavored yogurts and cereal bars reached the highest proportions (70% and 66%) of products available in their respective categories. None of the categories was on average “low in calories” according to criteria of CATR;sweetened breakfast cereals were the most caloric (180 kcal) and only sweetened juices had “calorie free” products (15%). Prepared meat did not meet the criterion of “low cholesterol” even though all the products in this category were the reduced fat version of the original CPF. All categories of cereal-based products met the “source of dietary fiber” criteria and 64% of baked products were “high in dietary fiber”. More than 70% of PFF exceeded the sugar recommendation of the PAHO profile, mainly sweetened breakfast cereals (100%) and sweetened juices (93%). 49% of the products exceeded the sodium recommendation, particularly baked products (100%) and cheeses (86%);100% of the later exceeded the recommendation of total fats. More than 60% of products simultaneously exceeded between 2 and 3 of PAHO profile criteria;5% exceeded all the criteria and 4% met all the PAHO profile criteria. The average price of PFF was $2.34, while that of conventional products was $1.87;sweetened breakfast cereals were the most expensive ($3.49 and $3.28) and sweetened juices were the cheapest ($1.79 and $1.89) for both CPF and PFF. Conclusions: PFF marketed in Honduras have an excessive con 展开更多
关键词 FUNCTIONAL FOODS Sugars SODIUM Fast FOODS CHOLESTEROL
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Thermodynamics of NaHCO3 decomposition during Na2CO3-based CO2 capture
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作者 Sam Toan William O’Dell +5 位作者 Christopher K.Russell Sun Zhao Qinghua Lai Huiping Song Ying Zhao Maohong Fan 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第4期74-80,共7页
Amine-basedcarbon-capture technologies have been shown to be energetically expensive and to cause significant environmental and epidemiological impacts due to their volatility.Bicarbonate formation from carbon dioxide... Amine-basedcarbon-capture technologies have been shown to be energetically expensive and to cause significant environmental and epidemiological impacts due to their volatility.Bicarbonate formation from carbon dioxide’s reaction with water has been suggested as an effective alternative for capturing CO2;however,the thermodynamics of this reaction are not well understood.This study experimentally determined the equilibrium constant of sodium bicarbonate(Na HCO3)decomposition to sodium,water,and carbon dioxide;the study also compared the equilibrium constant to theoretical calculations.Using a combination of experimentation and thermodynamic relationships,the unitless equilibrium constants of the forward and reverse reactions were calculated accurately(error<±9%and<±4%,respectively).Equilibrium data were calculated using enthalpy and entropy values of each component of Na HCO3decomposition at temperatures ranging from 25 to 155°C respectively.These results offer more data essential to optimizing Na HCO3use in environmentally friendly nextgeneration CO2-capture technologies. 展开更多
关键词 SODIUM BICARBONATE SODIUM carbonate Gibbs free energy ENTHALPY Entropy
金属钠催化下一元酯的高效无溶剂胺化反应
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作者 沈涛 欧阳博 +2 位作者 周少东 钱超 陈新志 《有机化学》 SCIE CAS CSCD 北大核心 2019年第3期873-877,共5页
开发了一种金属钠催化下一元酯的高效无溶剂胺化反应方法.通过金属钠与氨基钠对一元酯的胺化反应的对比实验,发现金属钠和液氨原位生成的氨基负离子对反应活性更高,提出了可能的反应机理.该方法反应速度快,反应条件温和,适合多种一元酯... 开发了一种金属钠催化下一元酯的高效无溶剂胺化反应方法.通过金属钠与氨基钠对一元酯的胺化反应的对比实验,发现金属钠和液氨原位生成的氨基负离子对反应活性更高,提出了可能的反应机理.该方法反应速度快,反应条件温和,适合多种一元酯的胺化. 展开更多
关键词 一元酯 胺化 氨基钠
Phosphorus Recovery from Incinerated Ash of Sewage Sludge by Heat Treatment 预览
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作者 Masaaki Takahashi Yukimasa Takemoto Eiji Yuuki 《材料科学与工程:中英文A版》 2019年第1期13-16,共4页
The phosphorus recovery from incinerated ash of sewage sludge by a heat treatment method was investigated.The incinerated ash of sewage sludge was mixed with sodium hydroxide or sodium carbonate,and treated at 750 ℃ ... The phosphorus recovery from incinerated ash of sewage sludge by a heat treatment method was investigated.The incinerated ash of sewage sludge was mixed with sodium hydroxide or sodium carbonate,and treated at 750 ℃ to 900 ℃ in aerobic conditions.The phosphorus was successfully recovered as an alkali metal phosphate from the treated ash through water extraction.The recovery rate of the phosphorus reached about 74% to 78%.The optimal condition of the phosphorus recovery and composition of the recovered phosphorus was investigated. 展开更多
关键词 Incinerated ASH SEWAGE sludge SODIUM HYDROXIDE SODIUM CARBONATE phosphorus recovery
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Optimization of Enzymatic Extraction of Sodium Chondroitin Sulfate From Bovine Nasal Bone 预览
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作者 Jinmao TAN Shunli XIAO +7 位作者 An TAN Gaoyuan ZOU Shuanghui WANG Yihong HU Yizhi ZHU Chenzhong JIN Na WU Yunyun ZHOU 《农业生物技术:英文版》 CAS 2019年第4期186-189,共4页
Taking bovine nasal bone as a raw material,the sodium chondroitin sulfate was extracted by enzymolysis-ion adsorption-alcohol precipitation method,and the enzymolysis process was optimized.After single factor experime... Taking bovine nasal bone as a raw material,the sodium chondroitin sulfate was extracted by enzymolysis-ion adsorption-alcohol precipitation method,and the enzymolysis process was optimized.After single factor experiments,the response surface analysis was performed by software Design-Expert 8.0,and the optimal enzymolysis conditions were as follows:the trypsin concentration of 0.8%,the pH value of 9.0,the enzymolysis temperature at 52℃,and the enzymolysis time of 2.0 h.With this combination of conditions,the concentration of sodium chondroitin sulfate extract reached 11.3 g/L,the bovine nasal bone yield was 35%,and the finished product content was 92.5%,which provided guidance for industrial production. 展开更多
关键词 SODIUM CHONDROITIN sulfate TRYPSIN PHOTOMETRIC TITRATION Response surface methodology
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Sodium butyrate prevents radiation-induced cognitive impairment by restoring pCREB/BDNF expression 预览
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作者 Hae June Lee Yeonghoon Son +6 位作者 Minyoung Lee Changjong Moon Sung Ho Kim In Sik Shin Miyoung Yang Sangwoo Bae Joong Sun Kim 《中国神经再生研究:英文版》 SCIE CAS CSCD 2019年第9期1530-1535,共6页
Sodium butyrate is a histone deacetylase inhibitor that affects various types of brain damages.To investigate the effects of sodium butyrate on hippocampal dysfunction that occurs after whole-brain irradiation in anim... Sodium butyrate is a histone deacetylase inhibitor that affects various types of brain damages.To investigate the effects of sodium butyrate on hippocampal dysfunction that occurs after whole-brain irradiation in animal models and the effect of sodium butyrate on radiation exposure-induced cognitive impairments,adult C57BL/6 mice were intraperitoneally treated with 0.6 g/kg sodium butyrate before exposure to 10 Gy cranial irradiation.Cognitive impairment in adult C57BL/6 mice was evaluated via an object recognition test 30 days after irradiation.We also detected the expression levels of neurogenic cell markers(doublecortin)and phosphorylated cAMP response element binding protein/brain-derived neurotrophic factor.Radiation-exposed mice had decreased cognitive function and hippocampal doublecortin and phosphorylated cAMP response element binding protein/brain-derived neurotrophic factor expression.Sodium butyrate pretreatment reversed these changes.These findings suggest that sodium butyrate can improve radiation-induced cognitive dysfunction through inhibiting the decrease in hippocampal phosphorylated cAMP response element binding protein/brain-derived neurotrophic factor expression.The study procedures were approved by the Institutional Animal Care and Use Committee of Korea Institute of Radiological Medical Sciences(approval No.KIRAMS16-0002)on December 30,2016. 展开更多
关键词 sodium BUTYRATE RADIOPROTECTOR ionizing radiation hippocampal damage cAMP response element binding BRAIN-DERIVED NEUROTROPHIC factor histone DEACETYLASE inhibitor neurogenesis
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Meta-analysis of the traditional Chinese medicine fumigation combined with sodium hyaluronate in the treatment of knee osteoarthritis
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作者 Yong Li Chen-Xiao Zheng Xu-Song Li 《海南医科大学学报(英文版)》 2019年第8期30-35,共6页
Objective:To explore the meta-analysis of traditional Chinese medicine fumigation combined with sodium hyaluronate in the treatment of knee osteoarthritis.Methods: The database was originated from CNKI, Wanfang, Chong... Objective:To explore the meta-analysis of traditional Chinese medicine fumigation combined with sodium hyaluronate in the treatment of knee osteoarthritis.Methods: The database was originated from CNKI, Wanfang, Chongqing Weipu database, PubMed and so on. The deadline was April 2017. The database was searched with the keywords of'Chinese herbal fumigation','sodium hyaluronate' and'knee osteoarthritis'. Finally, 13 articles about the treatment of Chinese herbal fumigation combined with sodium hyaluronate were obtained. RCT literatures of knee osteoarthritis identified the outcome indicators as the effective rate and recovery rate. Lysholm's score was observed after treatment in both groups, and all the results were input into Review Manager 5.2 for analysis.Result: A total of 13 RCT literatures about the treatment of knee osteoarthritis with Chinese herbal fumigation and sodium hyaluronate were obtained. The control group was treated with sodium hyaluronate or anti-inflammatory drugs, totaling 619 cases. The study group was treated with sodium hyaluronate and Chinese herbal fumigation, totaling 649 cases. The combined effect of forest map OR=1.82, Z=5.00 (P<0.00001), 95% CI. (1.44, 2.30). Compared with sodium hyaluronate or anti-inflammatory drugs, fumigation with traditional Chinese medicine combined with sodium hyaluronate has obvious advantages in curing knee osteoarthritis. The combined effect of forest chart OR=5.55, Z=7.44 (P<0.00001), 95% CI (3.54, 8.73), indicating that compared with sodium hyaluronate or anti-inflammatory drugs, traditional Chinese medicine is used. Fumigation combined with sodium hyaluronate has obvious advantages in the treatment of knee osteoarthritis;forest map combined effect OR=12.11, Z=5.18 (P<0.00001), 95% CI (7.53, 16.68), indicating that compared with sodium hyaluronate or anti-inflammatory drugs, traditional Chinese medicine fumigation combined with sodium hyaluronate in the treatment of knee osteoarthritis can restore knee joint function. Advantages.Conclusion: Chinese herbal 展开更多
关键词 Chinese medicine FUMIGATION Sodium HYALURONATE KNEE OSTEOARTHRITIS META analysis
均匀实验设计-电感耦合等离子体发射光谱(ICP-OES)法测定N36锆合金中微量钠元素含量 预览
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作者 惠泊宁 李维敏 +3 位作者 章海霞 黄增鑫 文惠民 周军 《中国无机分析化学》 CAS 2019年第2期61-64,共4页
建立了电感耦合等离子体发射光谱(ICP-OES)法测定N36锆合金中微量钠元素含量的分析方法。对样品溶解方法、观测方式、谱线选择、基体效应干扰等对实验的影响进行了讨论。采用均匀试验设计法确定了最佳的等离子体发生器功率、等离子气流... 建立了电感耦合等离子体发射光谱(ICP-OES)法测定N36锆合金中微量钠元素含量的分析方法。对样品溶解方法、观测方式、谱线选择、基体效应干扰等对实验的影响进行了讨论。采用均匀试验设计法确定了最佳的等离子体发生器功率、等离子气流量、辅助气流量、雾化气流量。实验结果表明,锆基体对测定结果有较大影响。采用基体匹配消除干扰,在均匀实验设计优化的仪器测定参数下,实验证明,方法的相对标准偏差(RSD,n=11)<5%,加标回收率在95%~105%。所建立的方法快捷、简便、准确,满足核用N36锆合金中微量钠元素的分析要求。 展开更多
关键词 N36锆合金 微量 电感耦合等离子体发射光谱法 均匀试验设计
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钠钾干预对成人血浆pentraxin-3的影响 预览
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作者 蒋伟 胡佳文 +1 位作者 褚超 牟建军 《西安交通大学学报:医学版》 CAS CSCD 北大核心 2019年第5期679-683,共5页
目的 观察饮食中钠钾摄入的变化对成人血浆正五聚蛋白3(pentraxin-3,PTX-3)水平的影响。方法 于陕西省礼泉县招募48名志愿者参与本项研究。本次研究采用专人烹饪、集中供餐的方式。整个研究分为4个阶段:①正常饮食(3d);②低盐饮食(1周,... 目的 观察饮食中钠钾摄入的变化对成人血浆正五聚蛋白3(pentraxin-3,PTX-3)水平的影响。方法 于陕西省礼泉县招募48名志愿者参与本项研究。本次研究采用专人烹饪、集中供餐的方式。整个研究分为4个阶段:①正常饮食(3d);②低盐饮食(1周,氯化钠3g/d);③高盐饮食(1周,氯化钠18g/d);④高盐补钾饮食(1周,氯化钠18g/d+钾4.5g/d)。血浆PTX-3水平通过ELISA法进行检测,尿钠、尿钾采用离子选择性电极进行测量。结果 血浆PTX-3水平低的受试者体质量指数、舒张压、平均动脉压相对较高。血浆PTX-3水平与体质量指数、舒张压、平均动脉压呈负相关。低盐饮食期血浆PTX-3水平降低[(0.57±0.19)ng/mLvs.(0.72±0.33)ng/mL,P=0.012]。高盐负荷后,血浆PTX-3水平明显升高[(0.68±0.26)ng/mLvs.(0.57±0.19)ng/mL,P=0.037]。增加钾的摄入能明显抑制高盐所诱导的PTX-3的升高[(0.56±0.21)ng/mLvs.(0.68±0.26)ng/mL,P=0.015]。PTX-3与24h尿钠钾比值呈正相关(r=0.230,P=0.002)。血浆PTX-3水平对饮食干预的反应在盐敏感者中更为明显。结论 膳食中钠钾摄入的变化可影响成人血浆PTX-3的水平,低盐摄入使得血浆PTX-3水平降低,而高盐饮食能引起血浆PTX-3水平明显升高,增加钾的摄入能明显抑制高盐诱导的PTX-3水平的升高。 展开更多
关键词 正五聚蛋白3 炎症 盐敏感性
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锂、钠、钾、镁、钙、氯复合电解质冰冻人血清国家标准品的研制和性能评价 预览
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作者 于婷 沈敏 +1 位作者 曲守方 黄杰 《检验医学》 CAS 2019年第5期457-462,共6页
目的研制锂、钠、钾、镁、钙、氯复合电解质冰冻人血清国家标准品,并评价其性能,促进锂、钠、钾、镁、钙、氯电解质测定的标准化。方法收集含不同浓度锂、钠、钾、镁、钙、氯离子的无溶血、脂血和黄疸血清,经多重过滤、除菌后分装,制备... 目的研制锂、钠、钾、镁、钙、氯复合电解质冰冻人血清国家标准品,并评价其性能,促进锂、钠、钾、镁、钙、氯电解质测定的标准化。方法收集含不同浓度锂、钠、钾、镁、钙、氯离子的无溶血、脂血和黄疸血清,经多重过滤、除菌后分装,制备成3个水平的候选品,-70℃保存。以钾离子作为均匀性评价的特性量,采用单因素方差分析评价候选品的均匀性。以钾、钠、氯离子作为稳定性评价的特性量,采用线性回归分析评价候选品的稳定性。采用参考方法或经验证的方法定值,并计算不确定度。评估候选品、新鲜血清样本在参考方法或经验证的方法与4个常规检测系统间的互通性。结果3个水平侯选品中,钾离子的均匀性检验F值分别为1.6301、1.4986和1.0208,均<F0.05;钾、钠、氯离子在2~8℃、20~25℃和-20℃条件下,均至少可稳定30d。3个水平侯选品中,锂离子定值结果分别为(0.649±0.022)、(1.195±0.032)、(1.334±0.008)mmol/L(k=2),钠离子定值结果分别为(120.057±2.206)、(142.030±1.521)、(158.228±1.293)mmol/L(k=2),钾离子定值结果分别为(5.042±0.143)、(5.739±0.106)、(6.158±0.094)mmol/L(k=2),镁离子定值结果分别为(0.732±0.021)、(0.857±0.026)、(1.144±0.026)mmol/L(k=2),钙离子定值结果分别为(2.014±0.078)、(2.348±0.056)、(3.070±0.024)mmol/L(k=2),氯离子定值结果分别为(90.814±2.005)、(108.875±0.908)、(128.156±1.453)mmol/L(k=2)。钠、钾、镁、钙和氯离子3个水平侯选品浓度均在新鲜血清样本的95%可信区间内,互通性良好。结论制备的锂、钠、钾、镁、钙、氯复合电解质冰冻人血清国家标准品候选品均匀性、稳定性好,钠、钾、镁、钙和氯离子侯选品互通性良好,定值准确可靠,可作为国家标准品使用。 展开更多
关键词 冰冻人血清 国家标准品
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Research Progress of Sodium Channel and Its Anti-arrhythmic Drugs 预览
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作者 Bo Liang Hui-Ling Liao 《心身医学研究》 2019年第1期5-9,共5页
With the acceleration of population aging,heart disease has been a high priority,and cardiac ion channel research has been one of the hot spots in the field,Sodium ion channels,as the most important class,have been wi... With the acceleration of population aging,heart disease has been a high priority,and cardiac ion channel research has been one of the hot spots in the field,Sodium ion channels,as the most important class,have been widely concerned.Therefore,this paper briefly introduces and discusses three aspects of the structure and function of sodium ion channels and the development of drug research. 展开更多
关键词 SODIUM CHANNEL Anti-arrhythmic DRUGS Arrhythmic
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2015年中国15个省份成年居民膳食钠的摄入状况
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作者 张继国 王志宏 +9 位作者 杜文雯 苏畅 姜红如 黄绯绯 贾小芳 欧阳一非 李丽 汪云 张兵 王惠君 《中华预防医学杂志》 CAS CSCD 北大核心 2019年第5期455-458,共4页
目的分析2015年中国15省份成年居民膳食钠的摄入状况。方法数据来源于中国居民营养状况变迁的队列研究,该项目采用连续3 d 24h回顾法记录食物摄入量及称重法记录的家庭调味品消费量。本研究选取15个省份2015年数据完整的14 847名18岁及... 目的分析2015年中国15省份成年居民膳食钠的摄入状况。方法数据来源于中国居民营养状况变迁的队列研究,该项目采用连续3 d 24h回顾法记录食物摄入量及称重法记录的家庭调味品消费量。本研究选取15个省份2015年数据完整的14 847名18岁及以上居民,进行钠摄入量分析,比较不同特征居民膳食钠的摄入量(M)差异。结果14 847名研究对象中男性占47.1%,农村及北方居民分别占60.1%和37.7%。2015年中国成年居民膳食钠摄入量为3 960.0 mg/d;男性的钠摄入量(4 272.1 mg/d)高于女性(3 716.6 mg/d),45~59岁居民(4 257.0 mg/d)高于其他年龄组(18~44岁居民为3 867.1 mg/d,60岁及以上居民为3 799.0 mg/d),农村居民(4 042.9 mg/d)高于城市(3 866.8 mg/d),北方居民(4 229.2 mg/d)高于南方(3 806.8 mg/d),P值均<0.05。膳食钠摄入量低于2 000 mg/d的占11.8%。2015年,中国成年居民膳食钠主要来源于调味品(79.4%),其后依次为烹调食物(11.9%)和加工食品(8.7%)。调味品中,食盐提供的钠占63.6%,其次为酱油,占10.4%。结论2015年中国成年居民膳食钠摄入较高,且存在性别、地区差别;调味品是膳食钠的主要来源。 展开更多
关键词 膳食 成年人 横断面研究 摄入量
18~69岁普通人群24h尿钠与微量白蛋白尿的关联分析
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作者 徐建伟 吴静 +3 位作者 陈晓荣 颜流霞 蔡小宁 马吉祥 《中华预防医学杂志》 CAS CSCD 北大核心 2019年第5期459-463,共5页
目的分析我国普通人群24h尿钠与微量白蛋白尿(MAU)的相关性。方法于2013年在山东省高密市和烟台市福山区,江苏省新沂市和赣榆县4个调查点,采用多阶段整群随机抽样的方法,选取2 400名18~69岁调查对象进行问卷调查、体格测量和24h尿液收集... 目的分析我国普通人群24h尿钠与微量白蛋白尿(MAU)的相关性。方法于2013年在山东省高密市和烟台市福山区,江苏省新沂市和赣榆县4个调查点,采用多阶段整群随机抽样的方法,选取2 400名18~69岁调查对象进行问卷调查、体格测量和24h尿液收集,最终纳入2 262名进行分析。根据24h尿钠的四分位数将调查对象分成Q1~Q4组,比较不同组之间的尿微量白蛋白水平及MAU检出率,采用多因素logistic回归模型分析尿钠与MAU发生的关系。结果调查对象年龄为(42.1±13.5)岁,其中男性1 124名(49.7%)。24h尿量为(1 411±495)ml,尿钠为(166.4±71.6)mmol/d,尿微量白蛋白M(P25,P75)为12.5(9.6,17.4)mg/d,MAU检出率为9.0%(203例),随着尿钠水平的升高,尿微量白蛋白水平呈上升趋势(P趋势<0.001),MAU检出率也呈上升趋势(P趋势<0.001)。调整年龄、性别、吸烟、饮酒、体重指数、高血压和糖尿病后,24h尿钠Q4组比Q1组人群MAU发生风险增加了174%,OR(95%CI)值为2.74(1.80~4.16)。结论24h尿钠与尿微量白蛋白及MAU发生有关,减盐有助于减少MAU发生。 展开更多
关键词 尿 白蛋白尿 横断面研究
Boosting the rate capability of multichannel porous TiCh nanofibers with well-dispersed Cu nanodots and Cu^2+-doping derived oxygen vacancies for sodium-ion batteries
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作者 Ying Wu Zengxi Wei +4 位作者 Rui Xu Yue Gong Lin Gu Jianmin Ma Yan Yu 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第9期2211-2217,共7页
The use of TiO2 as an anode in rechargeable sodium-ion batteries(NIBs)is hampered by intrinsic low electronic conductivity of TiO2 and in ferior electrode kinetics.Here,a high-performa nee T1O2 electrode for NIBs is p... The use of TiO2 as an anode in rechargeable sodium-ion batteries(NIBs)is hampered by intrinsic low electronic conductivity of TiO2 and in ferior electrode kinetics.Here,a high-performa nee T1O2 electrode for NIBs is prese nted by desig ning a multicha rinel porous T1O2 nano fibers with well-dispersed Cu nan odots and Cu^2+-doping derived oxyge n vaca ncies(Cu-MPTO).The in-situ grow n well-dispersed copper nano dots of about 3 nm on TiO2 surface could significantly enhance electronic conductivity of the TiO2 fibers.The one-dimensional multichannel porous structure could facilitate the electrolyte to soak in,leadi ng to short tran sport path of Na^+through carb on toward the TiO2 nano particle.The Cu^2+-doping induced oxygen vacancies could decrease the bandgap of T1O2,resulting in easy electron trapping.With this strategy,the Cu-MPTO electrodes render an outstanding rate performance for NIBs(120 mAh·g^-1 at 20 C)and a superior cycling stability for ultralong cycle life(120 mAh·g^-1 at 20 C and 96.5%retention over 2,000 cycles).Density functional theory(DFT)calculations also suggest that Cu^2+doping can enhance the conductivity and electron transfer of T1O2 and lower the sodiation energy barrier.This strategy is confirmed to be a general process and could be extended to improve the performance of other materials with low electronic conductivity applied in energy storage systems. 展开更多
关键词 multicha nnel POROUS T1O2 NANO fibers CU NANO dots Cu^2+dopi ng SODIUM ion batteries density functional theory(DFT)calculati ons
压片制样-X射线荧光光谱法分析铁矿石中钾钠锌 预览 被引量:1
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作者 张永顺 孙雪涛 +1 位作者 袁辉 杨刚 《冶金分析》 CAS 北大核心 2019年第1期72-76,共5页
在高炉炼铁过程中,入炉料铁矿石中钾、钠、锌3种元素会与高炉耐火砖发生反应,严重时会使耐火砖砖体破裂,影响高炉生产。为保证炼铁高炉稳定顺行,需要对铁矿石中钾、钠、锌3元素快速、准确测定。实验将试样研磨过200目(74μm)筛,压样机压... 在高炉炼铁过程中,入炉料铁矿石中钾、钠、锌3种元素会与高炉耐火砖发生反应,严重时会使耐火砖砖体破裂,影响高炉生产。为保证炼铁高炉稳定顺行,需要对铁矿石中钾、钠、锌3元素快速、准确测定。实验将试样研磨过200目(74μm)筛,压样机压力30t,保压时间30s,应用压片制样-X射线荧光光谱仪(XRF)测定铁矿石中钾、钠、锌3种元素。对同一铁矿石试样进行精密度测试,钾、钠、锌3种元素测定结果的相对标准偏差(RSD,n=11)为1.3%、1.5%、2.8%。对铁矿石标准样品进行分析,测定值与认定值一致,相对误差在允许范围内。 展开更多
关键词 X射线荧光光谱仪 压片制样 铁矿石
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Mucosal healing progression after acute colitis in mice 预览
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作者 Sandra Vidal-Lletjós Mireille Andriamihaja +7 位作者 Anne Blais Marta Grauso Patricia Lepage Anne-Marie Davila Claire Gaudichon Marion Leclerc Fran?ois Blachier Anna?g Lan 《世界胃肠病学杂志:英文版》 SCIE CAS 2019年第27期3572-3589,共18页
BACKGROUND Mucosal healing has become a therapeutic goal to achieve stable remission in patients with inflammatory bowel diseases. To achieve this objective, overlapping actions of complex cellular processes, such as ... BACKGROUND Mucosal healing has become a therapeutic goal to achieve stable remission in patients with inflammatory bowel diseases. To achieve this objective, overlapping actions of complex cellular processes, such as migration, proliferation, and differentiation, are required. These events are longitudinally and tightly controlled by numerous factors including a wide range of distinct regulatory proteins. However, the sequence of events associated with colon mucosal repair after colitis and the evolution of the luminal content characteristics during this process have been little studied.AIM To document the evolution of colon mucosal characteristics during mucosal healing using a mouse model with chemically-induced colitis.METHODS C57 BL/6 male mice were given 3.5% dextran sodium sulfate(DSS) in drinking water for 5 d. They were euthanized 2(day 7), 5(day 10), 8(day 13), and 23(day28) d after DSS removal. The colonic luminal environment and epithelial repair processes during the inflammatory flare and colitis resolution were analyzed with reference to a non-DSS treated control group, euthanized at day 0. Epithelial repair events were assessed histo-morphologically in combination with functional permeability tests, expression of key inflammatory and repairing factors, and evaluation of colon mucosa-adherent microbiota composition by 16 S rRNA sequencing.RESULTS The maximal intensity of colitis was concomitant with maximal alterations of intestinal barrier function and histological damage associated with goblet cell depletion in colon mucosa. It was recorded 2 d after termination of the DSStreatment, followed by a progressive return to values similar to those of control mice. Although signs of colitis were severe(inflammatory cell infiltrate, crypt disarray, increased permeability) and associated with colonic luminal alterations(hyperosmolarity, dysbiosis, decrease in short-chain fatty acid content), epithelial healing processes were launched early during the inflammatory flare with increased gene expression of cert 展开更多
关键词 COLON LUMINAL environment DEXTRAN sodium sulfate-induced COLITIS DYSBIOSIS Epithelial repair ACUTE COLITIS
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Effects of parecoxib + dexmedetomidine on systemic inflammation and oxidative stress during anesthesia recovery period of thoracoscopic surgery
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作者 Qing-Bo Han Yang Liu +2 位作者 Zhen-Hua Wang Ping-Xuan Guo Jun-Yan Li 《海南医科大学学报(英文版)》 2019年第10期57-61,共5页
Objective: To study the effects of parecoxib + dexmedetomidine on systemic inflammation and oxidative stress during anesthesia recovery period of thoracoscopic surgery. Methods:The lung cancer patients undergoing thor... Objective: To study the effects of parecoxib + dexmedetomidine on systemic inflammation and oxidative stress during anesthesia recovery period of thoracoscopic surgery. Methods:The lung cancer patients undergoing thoracoscopic surgery in Kailuan General Hospital between March 2015 and February 2018 were selected as the research subjects and randomly divided into the experimental group who received parecoxib + dexmedetomidine preemptive analgesia combined with conventional anesthesia and the control group who received conventional anesthesia. 3 and 5 d after surgery, serum was collected to measure the contents of inflammatory cytokines interferon-γ (IFN-γ), interleukin-1β (IL-1β), interleukin-18 (IL-18), intercellular adhesion molecule-1 (ICAM1) and monocyte chemoattractant protein-1 (MCP1) as well as oxidative stress mediators cortisol (COR), malondialdehyde (MDA), endothelin-1 (ET-1), superoxide dismutase (SOD) and total antioxidant capacity (T-AOC), and peripheral anticoagulant blood was collected to measure the expressions of inflammatory signaling molecules Toll-like receptor 4 (TLR4), NOD-like receptor protein 3 (NLRP3), nuclear factor-κB (NF-κB), apoptosis-associated speck-like protein containing CARD (ASC) and cysteinyl aspartate specific proteinase-1 (caspase-1) as well as oxidative stress molecules nuclear factor E2-related factor 2 (NRF2), antioxidant response element (ARE), NADPH oxidase (NOX) 2 and NOX4. Results: 3 and 5 d after surgery, serum IFN-γ, IL-1β, IL-18, ICAM1, MCP1, COR, MDA and ET-1 contents as well as peripheral blood TLR4, NLRP3, NF-κB, ASC, Caspase-1, NRF2, ARE, NOX2 and NOX4 expression intensity of the experimental group were significantly lower than those of the control group whereas serum SOD and T-AOC contents were higher than those of the control group. Conclusion: Parecoxib+ dexmedetomidine can inhibit the systemic inflammation and oxidative stress during anesthesia recovery period of thoracoscopic surgery. 展开更多
关键词 THORACOSCOPIC surgery PARECOXIB sodium DEXMEDETOMIDINE INFLAMMATION OXIDATIVE stress
Effect of an eco-friendly o/w emulsion stabilized with amphiphilic sodium alginate derivatives on lambda-cyhalothrin adsorption-desorption on natural soil minerals
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作者 Yang Peng Dunchao Xiao +6 位作者 Gaobo Yu Yuhong Feng Jiacheng Li Xinyu Zhao Yiyuan Tang Longzheng Wang Quan Zhang 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第4期230-238,共9页
The effects of amphiphilic O/W emulsions,stabilized by the alkyl polyglycoside(APG)or cholesterol-grafted sodium alginate(CSAD)/APG systems,on lambda-cyhalothrin adsorption/desorption mechanisms on natural soil minera... The effects of amphiphilic O/W emulsions,stabilized by the alkyl polyglycoside(APG)or cholesterol-grafted sodium alginate(CSAD)/APG systems,on lambda-cyhalothrin adsorption/desorption mechanisms on natural soil minerals(i.e.,illite and kaolinite)were investigated.Sorption and desorption of lambda-cyhalothrin onto soil minerals was studied via batch equilibration to give insight into the adsorption equilibrium,kinetics,and thermodynamics of lambda-cyhalothrin adsorption onto minerals.The results indicate the following:(i)The adsorption processes for the APG system and CSAD/APG system include:rapid adsorption,slow adsorption,and adsorption equilibrium.The adsorption kinetics of pesticide on illite and kaolinite are in accordance with the Ho and McKay model,and the adsorption isotherm conforms to the Freundlich model.In addition,the adsorption processes of pesticide for the two systems on minerals were spontaneous and feasible(ΔG0<0),endothermic(ΔH0>0),and mainly involved chemical bonding(ΔH0>60).(ii)The equilibrium adsorption percentages of the pesticide on illite for the APG system and CSAD/APG system were 42.4%and 64.8%,and the corresponding equilibrium adsorption percentages on kaolinite were 40.8%and 61.8%,respectively.Moreover,the pesticide adsorption rate K2-CSAD/APGwas faster than K2-APG,and its adsorption capacity Kf-CSAD/APG was greater than Kf-APG.Meanwhile,the pesticide desorption Kfdin the CSAD/APG system was smaller than that in the APG system.As a result,this eco-friendly O/W emulsion based on amphiphilic sodium alginate derivatives might provide a green pesticide formulation,since it could reduce the amount of lambda-cyhalothrin entering aquatic systems to threaten non-target fish and invertebrate species. 展开更多
关键词 Sodium ALGINATE DERIVATIVES Alkyl polyglycoside Synergetic EFFECT Green pesticide Water pollution remediation LAMBDA-CYHALOTHRIN
火焰原子发射光谱法测定钾、钠含量 预览
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作者 华细灿 《化工时刊》 CAS 2019年第7期17-19,共3页
本文采用火焰原子发射光谱法测定钾和钠,空气-乙炔比为13.0∶2.0,观测高度为3cm,回收率为98~102%。平行实验5次测结果,得钾的相对标准偏差为0.4%,钠为2.0%,浓度范围为0-10μg/mL和0~8μg/mL时,钾、钠的校准曲线呈直线。最佳条件下,钾的... 本文采用火焰原子发射光谱法测定钾和钠,空气-乙炔比为13.0∶2.0,观测高度为3cm,回收率为98~102%。平行实验5次测结果,得钾的相对标准偏差为0.4%,钠为2.0%,浓度范围为0-10μg/mL和0~8μg/mL时,钾、钠的校准曲线呈直线。最佳条件下,钾的检出限为0.01μg/mL,钠的检出限为0.06μg/mL。该法测定快速简便,具有实用价值。 展开更多
关键词 火焰发射法
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