检索结果-南通市图书馆

Titanium dioxide as an adsorbent to enhance the detection ability of near-infrared diffuse reflectance spectroscopy

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2019年第5期30卷 1024-1026页

作者： shuyu Wang jin Zhang Wensheng Cai Xueguang Shao Research Center for Analytical Sciences College of ChemistryNankai UniversityTianjin 300071China Tianjin Key Laboratory of Biosensing and Molecular Recognition Tianjin 300071China State Key Laboratory of Medicinal Chemical Biology Tianjin 300071China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300071China

A method for quantitative determination of fish sperm deoxyribonucleic acid(fsDNA)was developed by using titanium dioxide(TiO2)as an adsorbent and near-infrared diffuse reflectance spectroscopy(NIRDRS).The selective enrichment of fsDNA was proved by comparing the adsorption efficiency of bovine serum albumin,tyrosine and tryptophan,and the low adsorption background of TiO2 was illustrated by comparing the spectra of four commonly-used inorganic adsorbents(alkaline aluminium oxide,neutral aluminium oxide,nano-hydroxyapatite and silica).The spectral feature of fsDNA can be clearly observed in the spectrum of the *** least squares(PLS)model was built for quantitative determination of fsDNA using 28 solutions,and 13 solutions with interferences were used for validation of the *** results showed that the correlation coefficient(R)between the predicted and the reference concentration is 0.9727 and the recoveries of the validation samples are in the range of 98.2%-100.7%.

关键词： Near-infrared diffuse reflectance spectroscopy Quantitative model Detection ability Titanium dioxide Fish sperm DNA

基于“三师共管”平台探讨910例2型糖尿病患者失眠、胃肠道症状与糖化血红蛋白的相关性

在线全文

学校读者我要写书评

暂无评论

北京中医药大学学报 2024年第7期47卷 989-997页

作者：李博袁琪王永发冯尤健王桂妙粘为东周艺胡天赤马思思贾丽燕张智海李津闫冰赵能江杨叔禹厦门大学附属第一医院厦门大学医学院中西医结合中心厦门市中医院晋江市中医院厦门市第五医院安溪县中医院南安市中医院

目的探讨2型糖尿病(T2DM)患者的失眠、胃肠道症状与糖化血红蛋白(HbA1c)的关系。方法纳入2022年1—12月于厦门大学附属第一医院、厦门市中医院、晋江市中医院等就诊的T2DM患者910例，采集患者的一般资料(性别、年龄、吸烟饮酒史、运... 详细信息

目的探讨2型糖尿病(T2DM)患者的失眠、胃肠道症状与糖化血红蛋白(HbA1c)的关系。方法纳入2022年1—12月于厦门大学附属第一医院、厦门市中医院、晋江市中医院等就诊的T2DM患者910例，采集患者的一般资料(性别、年龄、吸烟饮酒史、运动情况、病程、治疗方式和并发症数量),HbA1c,阿森斯失眠量表(AIS)评分和胃肠道症状评定量表(GSRS)评分等信息，根据HbA1c控制是否达标分为2组，比较睡眠及胃肠道症状差异，并对差异与HbA1c水平进行相关性分析，同时根据上述采集信息对HbA1c控制不达标进行危险因素分析。结果 HbA1c控制达标组的AIS评分与GSRS评分均低于控制未达标组(P<0.01);37.0%的T2DM患者伴有失眠，失眠组的HbA1c水平高于非失眠组(10.00%±2.38%、8.26%±1.73%,P<0.01);57.5%的T2DM患者伴有胃肠道症状，伴有胃肠道症状组的HbA1c水平高于不伴有胃肠道症状组(9.26%±2.23%、8.43%±1.98%,P<0.01);26.3%的T2DM患者同时伴有失眠及胃肠道症状，伴失眠及胃肠道症状组的HbA1c水平高于不伴有失眠及胃肠道症状组(10.18%±2.44%、8.45%±1.86%,P<0.01);睡眠质量、胃肠功能与HbA1c水平存在显著相关性(P<0.01);年龄、GSRS评分、AIS评分、失眠合并胃肠道等指标是预测HbA1c≥6.5%的独立危险因素(P<0.01),同时伴有失眠合并胃肠道症状，是HbA1c控制不达标的最强风险因素，当两者伴随出现时，血糖控制的风险可能相应升高约5倍。结论失眠和胃肠道症状是T2DM患者的常见伴随疾病，两者呈现交叉串扰关系，并且与血糖控制不佳合并出现、互为因果、叠加放大。

关键词： 2型糖尿病失眠胃肠道症状糖化血红蛋白 “三师共管”平台

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

机器噪声平均声压级计算方法差异性实证研究

电动工具 2024年第1期 19-22页

作者：高淑瑜孙平熙陈奎陈灵通金佩薇陈于林李银松叶宇晨温岭市方圆检测有限公司浙江温岭317525 浙江和超电机有限公司浙江温岭317523

针对家用电器、电动工具、电弧焊机、容积式压缩机、水泵、风机等机器的噪声平均声压级计算过程,介绍典型的机器噪声平均声压级计算方法。分析多种计算方法的差异,同时给出确定噪声平均声压级推荐采用的计算方法。

关键词：电动工具家用电器噪声声压级计算方法

在线全文

学校读者我要写书评

暂无评论

近浅海环境监测系泊系统的设计研究

湖南理工学院学报（自然科学版） 2017年第1期30卷 7-10页

作者：金伟锋吴思佳章春豪徐嘉琦徐俊康金书玉浙江中医药大学杭州310053

为了有效开展近浅海环境调查监测,本文建立了监测网传输系统中系泊系统的运动方程.根据受力平衡与力矩平衡分析,得到了基于差分方程的系泊系统状态变量的表达式.在满足系统正常工作的前提下,根据所选择的锚链型号可数值计算出在极端天... 详细信息

为了有效开展近浅海环境调查监测,本文建立了监测网传输系统中系泊系统的运动方程.根据受力平衡与力矩平衡分析,得到了基于差分方程的系泊系统状态变量的表达式.在满足系统正常工作的前提下,根据所选择的锚链型号可数值计算出在极端天气下所需锚链长度与挂件重物球的质量.结果显示,本方法能确保整个系统可抗强台风、正常运行与海上安全.

关键词：系泊系统差分方程静力平衡力矩平衡

[Emim]HSO_4-AlCl_3催化1-丁烯齐聚

在线全文

学校读者我要写书评

暂无评论

工业催化 2012年第6期20卷 41-43页

作者：王丽丁洪生杨晓明张冬梅金树余辽宁石油化工大学化学与材料科学学院辽宁抚顺113001

制备Brnsted-Lewis双酸性离子液体催化剂[Emim]HSO4-AlCl3,并用于催化1-丁烯齐聚反应,考察催化剂用量、反应压力、反应温度和反应时间对1-丁烯齐聚产物选择性的影响。结果表明,强酸性离子液体催化1-丁烯齐聚反应得到的产物主要为四聚... 详细信息

制备Brnsted-Lewis双酸性离子液体催化剂[Emim]HSO4-AlCl3,并用于催化1-丁烯齐聚反应,考察催化剂用量、反应压力、反应温度和反应时间对1-丁烯齐聚产物选择性的影响。结果表明,强酸性离子液体催化1-丁烯齐聚反应得到的产物主要为四聚体。在n(AlCl3)∶n([Emim]HSO4)=1∶1、催化剂用量2.5 g、反应温度30℃、反应压力0.08 MPa和反应时间1.0 h条件下进行齐聚反应,产物选择性和反应体系的稳定性较理想。

关键词：催化化学 1-丁烯齐聚酸性离子液体催化剂

Role of social organization engagement in high-risk groups intervention against HIV/AIDS:a case study from 176 cities of China

在线全文

学校读者我要写书评

暂无评论

Infectious Diseases of Poverty 2022年第6期11卷 70-83页

作者： Zhiwei Leng Sha Sha shuyu Dai Xuehui Meng jinfeng Li Junyi jin Wenlin Zheng Weihua Yang Chuanju Mao Zhenzhong Wang Liujin Zhang Peng Wang Tao Yang Weizhong Yang School of Population Medicine and Public Health Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijingChina Chinese Preventive Medicine Association BeijingChina Zhejiang Chinese Medical University HangzhouChina Centre for Health Management and Policy Research School of Public HealthCheeloo College of MedicineShandong UniversityJinanChina Chinese Academy of Medical Sciences&Peking Union Medical College BeijingChina

Background: A high-risk prevention strategy is an effective way to fight against human immunodeficiency virus (HIV) and acquired immunodeficiency syndrome (AIDS). The China AIDS Fund for Non-Governmental Organizations (CAFNGO) was established in 2015 to help social organizations intervene to protect high-risk populations in 176 cities. This study aimed to evaluate the role of social organizations in high-risk population interventions against HIV/***: This study was based on the CAFNGO program from 2016 to 2020. The collected data included the number and types of social organizations participating in high-risk group interventions and the amount of funds obtained by these organizations each year. We explored the factors influencing the number of newly diagnosed AIDS cases using a spatial econometric model. Furthermore, we evaluated the effectiveness of intervention activities by comparing the percentages of the individuals who initially tested positive, and the individuals who took the confirmatory test, as well as those who retested positive and underwent the ***: Overall, from 2016 to 2020, the number of social organizations involved in interventions to protect HIV/AIDS high-risk populations increased from 441 to 532, and the invested fund increased from $3.98 to $10.58 million. The number of newly diagnosed cases decreased from 9128 to 8546 during the same period. Although the number of cities with overall spatial correlations decreased, the spatial agglomeration effect persisted in the large cities. Citywise, the number of social organizations (direct effect 19.13), the permanent resident population (direct effect 0.12), GDP per capita (direct effect 17.58;indirect effect -15.38), and passenger turnover volume (direct effect 5.50;indirect effect -8.64) were the major factors influencing new positive cases confirmed through the testing interventions performed by the social organizations. The initial positive test rates among high-risk populat

关键词： Social organization High-risk groups HIV/AIDS Spatial effect

在线全文

学校读者我要写书评

暂无评论

围绝经期妇女对激素替代治疗认知水平的调查

解放军护理杂志 2016年第2期33卷 69-70页

作者：刘宇佳周染云金舒宇刘元月史作伟孙蒙军事医学科学院附属医院妇科北京100071 军事医学科学院附属医院护理部

目的了解围绝经期妇女对激素替代治疗(hormone replacement therapy,HRT)的认识水平,以期为有重点地开展围绝经期自我保健宣讲和治疗对策提供依据。方法 2014年8月1日至11月1日,采用便利抽样法选取在解放军第307医院门诊咨询和治疗的围... 详细信息

目的了解围绝经期妇女对激素替代治疗(hormone replacement therapy,HRT)的认识水平,以期为有重点地开展围绝经期自我保健宣讲和治疗对策提供依据。方法 2014年8月1日至11月1日,采用便利抽样法选取在解放军第307医院门诊咨询和治疗的围绝经期女性251名为研究对象,采用自制的"围绝经期妇女对激素替代治疗认知情况"调查表对其进行调查,并分析结果。结果围绝经期妇女对HRT了解和认知程度低,对激素水平降低对低骨质疏松特别是心脑血管疾病的影响了解不够。结论针对围绝经期妇女保健知识和HRT了解程度较低的现状,应有重点地开展科学、有效的健康教育和心理咨询,帮助其掌握自我保健方法和科学治疗方法,从而提高其生活质量。

关键词：围绝经期激素替代治疗认知度

在线全文

学校读者我要写书评

暂无评论

三氟甲磺酸催化1-己烯齐聚反应的研究

工业催化 2012年第2期20卷 41-43页

作者：金树余丁洪生赵春明杨晓明刘晓宇辽宁石油化工大学辽宁抚顺113001

使用三氟甲磺酸作催化剂对1-己烯齐聚反应进行研究。考察三氟甲磺酸催化剂用量、反应温度和反应时间等工艺条件对产物聚α-烯烃收率的影响。确定了最佳工艺条件:催化剂用量1.0 mL,反应温度50℃,反应时间3 h,此条件下,1-己烯转化率约为9... 详细信息

使用三氟甲磺酸作催化剂对1-己烯齐聚反应进行研究。考察三氟甲磺酸催化剂用量、反应温度和反应时间等工艺条件对产物聚α-烯烃收率的影响。确定了最佳工艺条件:催化剂用量1.0 mL,反应温度50℃,反应时间3 h,此条件下,1-己烯转化率约为90%,产物主要是二聚物、三聚物、四聚物和五聚物,没有裂解产品。为进一步工业化开发聚α-烯烃合成油提供了基础数据。

关键词：石油化学工程三氟甲磺酸齐聚 1-己烯聚α-烯烃油

Determination of triglycerides in human serum by near-infrared diffuse reflectance spectroscopy using silver mirror as a substrate

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2019年第1期30卷 111-114页

作者： shuyu Wang jin Zhang Cuicui Wang Xiaoming Yu Wensheng Cai Xueguang Shao Research Center for Analytical Sciences College of Chemistry Nankai University Laboratory of Clinic People’s Hospital of Gaomi City Tianjin Key Laboratory of Biosensing and Molecular Recognition State Key Laboratory of Medicinal Chemical Biology Collaborative Innovation Center of Chemical Science and Engineering

Near infrared diffuse reflectance spectroscopy(NIRDRS) has gained wide attention due to its convenience for rapid quantitative analysis of complex samples. A method for rapid analysis of triglycerides in human serum using NIRDRS with silver mirror as the substrate is developed. Due to the even and high reflectance of the silver mirror, the spectral response is enhanced and the background interference is ***, both linear and nonlinear modeling strategies were investigated adopting the partial least squares(PLS) and least squares support vector regression(LS-SVR), continuous wavelet transform(CWT)was used for spectral preprocessing, and variable selection was tried using Monte Carlo uninformative variable elimination(MC-UVE), randomization test(RT) and competitive adaptive reweighted sampling(CARS) for optimization the models. The results show that the determination coefficient(R) between the predicted and reference concentration is 0.9624 and the root mean squared error of prediction(RMSEP) is 0.21. The maximum deviation of the prediction results is as low as 0.473 mmol/L. The proposed method may provide an alternative method for routine analysis of serum triglycerides in clinical applications.

关键词： Near-infrared diffuse reflectance spectroscopy Silver mirror Variable selection Quantitative model Serum triglycerides