检索结果-南通市图书馆

Journal of Environmental Sciences 2023年第4期126卷 697-707页

作者： Qiang Wang Daizhi An Zhengquan Yuan rubao sun Wei Lu Lili Wang Chinese People’s Liberation Army Center for Disease Control and Prevention Beijing 100071China

Indoor particle release from toner printing equipment (TPE) is a major health concern and has received wide *** this study,nine printing centers were randomly selected and three working phases were simulated,namely,non-working,normal printing/copying,and heavy printing/*** dynamics of the ozone (O_(3)),volatile organic compound (VOC),and particle emissions from TPE were determined by portable *** showed that particles,VOCs,and O_(3)were indeed discharged,and particles and VOCs concentrations remained at high *** them,44%of the rooms represented high-level particle ***-sized particles,especially nanoparticles,were positively correlated with VOCs,but were inversely proportional to the O_(3)*** elements,Ca,Al,Mg and Ni,were usually present in nanoparticles because of the discharge of ***,Al,K,Ni and Pb were found in the submicrometer-sized particles and were consistent with the toner *** potential particle precursors were identified,which suggested that styrene was the most likely secondary organic aerosol (SOA) ***,the use of the toner formulation and the discharge of paper attribute to the TPE-emitted particles,in which styrene is a specific monitoring indicator for the formation of SOA.

关键词： Toner-based printing equipment Particulate matter Ozone Volatile organic compound Secondary organic aerosol precursor

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优质鳀鱼鱼粉蒸煮工艺技术的优化研究

粮食与饲料工业 2008年第10期 32-33页

作者：谢超孙如宝浙江海洋学院食品与药学学院浙江舟山316000

对鳀鱼原料生产鱼粉蛋白过程中蒸煮条件进行了优化研究。结果表明,鳀鱼生产优质鱼粉的蒸气压力为0.6 MPa、蒸煮机转数为5 r/min、蒸煮时间为10 min及蒸煮温度为90℃,在此条件下生产的优质鳀鱼鱼粉粗蛋白质为66%、粗脂肪9%、胃蛋白酶消化... 详细信息

对鳀鱼原料生产鱼粉蛋白过程中蒸煮条件进行了优化研究。结果表明,鳀鱼生产优质鱼粉的蒸气压力为0.6 MPa、蒸煮机转数为5 r/min、蒸煮时间为10 min及蒸煮温度为90℃,在此条件下生产的优质鳀鱼鱼粉粗蛋白质为66%、粗脂肪9%、胃蛋白酶消化率88%、盐分2.5%、灰分16%。

关键词：鳀鱼优质鱼粉工艺优化

顶空固相微萃取-气相色谱-质谱法测定软木塞中愈创木酚的含量

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理化检验（化学分册） 2018年第10期54卷 1194-1197页

作者：白淼张灿甘雨然张明露安代志王强孙如宝中国人民解放军疾病预防控制所北京100071 北京工商大学环境科学与工程系北京100048

取磨碎的软木塞样品0.500 0g,用水超声提取30min,取提取液9mL置于萃取瓶中,加入1.8g Na2SO4,于55℃进行固相微萃取35min后,于气相色谱仪进样口解吸7min,采用气相色谱-质谱法测定其中愈创木酚的含量。结果表明:愈创木酚在25.00～2 000μg... 详细信息

取磨碎的软木塞样品0.500 0g,用水超声提取30min,取提取液9mL置于萃取瓶中,加入1.8g Na2SO4,于55℃进行固相微萃取35min后,于气相色谱仪进样口解吸7min,采用气相色谱-质谱法测定其中愈创木酚的含量。结果表明:愈创木酚在25.00～2 000μg·L-1内与其峰面积呈线性关系,检出限(3S/N)为0.022μg·L-1,按标准加入法进行回收试验,回收率为69.8%～115%,测定值的相对标准偏差(n=6)为6.3%～13%。

关键词：气相色谱-质谱法固相微萃取愈创木酚软木塞

Oxidative Damage on Lung Tissue and Peripheral Blood in Endotracheally Treated Rat by PM2.5

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Oxidative Damage on Lung Tissue and Peripheral Blood in Endo...

基于电子鼻和电子舌技术对山西老陈醋和老陈醋的风味检测

2007中国科协年会

作者： Lin Zhiqing~1 Xi Zhuge~(*1,2) Yang Danfeng~1 Chao Fuhuang~1 Zhang Huashan~1 Zhang Wei~1 Liu Huangliang~1 Yang Zaiming~1 sun rubao~1 1.Institute of Health and Environmental Medicine,Tiqnjin 300050,China 2.State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control,P.R.China

Objective Since epidemiological studies have firmly implied the environmental atmospheric fine particle matters(PM)as potential etiological factor involved in the excess of mortality by lung end cardiovascular diseases, experimental studies have been performed to investigate the oxidative damage of lung tissue and peripheral blood. Methods PM samples were collected by auto-sampling instrument in summer and *** treated samples were endotracheally instillatilled on *** activity of reduced glutathione peroxidase(GSH-Px)and the concentration of malondialdehyde(MDA)were used as the oxidative damage biomarkers of lung tissue and peripheral blood detected by the biochemistry *** DNA migeration length(μm)and rate of tail were used as the DNA damage biomarkers of lung tissue and peripheral blood detected by the biochemistry *** The activity of GSH-Px and the concentration of MDA in the lung tissue had the significant decrease after 7 and 14 days exposure of *** peripheral blood,the concentration of MDA decreased;but the activity of GSH-Px increased in 7 days and increased in 14 days exposure *** two indicators had the dose-effect relationships,and the similar changeful tendency in the lung tissue and peripheral *** DNA migeration length(μm)and rate of tail in the lung tissue and peripheral blood had the significant increase after 7 and 14 days exposure of *** two indicators had the dose-effect relationships,and the similar changeful tendency in the lung tissue and peripheral *** PM has definite oxidative effect on lung tissue and peripheral *** activity of GSH-Px and the concentration of MDA are the valuable biomarkers of the oxidative damage of lung tissues induced by *** DNA migeration length(μm)and rate of tail are the simple and valuable biomarkers of the DNA damage of lung tissues and peripheral blood induced by PM,we can detect the degree of DNA damage in peripheral blood to predict the degree o

关键词： PM2.5 Endotracheal instillation Oxidative damage Oxidative DNA damage Biomarker DNA repair

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食品与发酵科技 2024年第2期60卷 115-122页

作者：乔羽王艳艳曾红艳孙如宝董丽娟曲桂燕冯木香济南智感分析仪器有限公司济南250300 烟台富美特信息科技股份有限公司烟台264000

采用Heracles NEO超快速气相色谱电子鼻和Astree电子舌对执行不同标准的山西老陈醋和山西产地的老陈醋共12个样品进行检测。结果显示:基于气味差异电子鼻并不能将两类老陈醋样品进行有效地区分,利用电子鼻从12个样品中共检出33种挥发性... 详细信息

采用Heracles NEO超快速气相色谱电子鼻和Astree电子舌对执行不同标准的山西老陈醋和山西产地的老陈醋共12个样品进行检测。结果显示:基于气味差异电子鼻并不能将两类老陈醋样品进行有效地区分,利用电子鼻从12个样品中共检出33种挥发性气味化合物,其中酸类化合物5种、酯类化合物6种、醇类化合物7种,醛类化合物4种,酮类化合物3种,酚类化合物2种,其他类化合物6种,33种气味化合物中有25种为共有挥发性气味成分;基于滋味差异电子鼻可以区分山西产地的老陈醋和山西老陈醋样品,电子舌味觉分析结果显示老陈醋比山西老陈醋的酸味感强。采用电子舌可以综合分析样品间的总体滋味差异,实现两类老陈醋的辨别和区分,可为食醋种类鉴别提供技术参考。

关键词：电子鼻电子舌山西老陈醋老陈醋风味

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凹型端齿削弱永磁直线电机端部力波动方法

电工技术学报 2015年第7期30卷 119-124页

作者：彭兵刘铁法张囡夏加宽荆汝宝孙宜标沈阳工业大学电气工程学院沈阳110870

结合端面磁通函数和虚位移法推导PMLM端部效应产生的单端推力波动和法向力波动的解析表达式,揭示端部效应引起的推力波动和法向力波动的规律。通过对傅里叶级数的分析,提出反相位补偿原理的凹型端齿结构,该结构能消除推力波动和法向力... 详细信息

结合端面磁通函数和虚位移法推导PMLM端部效应产生的单端推力波动和法向力波动的解析表达式,揭示端部效应引起的推力波动和法向力波动的规律。通过对傅里叶级数的分析,提出反相位补偿原理的凹型端齿结构,该结构能消除推力波动和法向力波动的奇次谐波,解决传统的优化动子长度削弱推力波动但带来电机纵向"俯仰运动趋势"的缺点,同时还能消除动子横向"俯仰运动趋势"。最后以齿槽效应较弱的12槽11极PMLM为例,采用有限元仿真和实验验证,结果证明该方法能够削弱端部效应产生的法向力波动和推力波动。

关键词：永磁直线电机端部效应端部效应法向力波动端部效应推力波动凹型端齿

基于“筋骨平衡”理论的三维调颈手法结合针刀治疗神经根型颈椎病的疗效观察

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江西中医药 2024年第5期55卷 54-56页

作者：孙明郭汝宝浙江中医药大学第三临床医学院杭州310053 浙江中医药大学附属第三医院椎间盘中心杭州310005

目的:观察三维调颈手法结合针刀对神经根型颈椎病患者的疗效。方法:选取2021年2月—2022年2月浙江中医药大学附属第三医院收治的128例神经根型颈椎病患者作为研究对象,根据随机数表法分为对照组、手法组、针刀组、手法结合针刀组,各32... 详细信息

目的:观察三维调颈手法结合针刀对神经根型颈椎病患者的疗效。方法:选取2021年2月—2022年2月浙江中医药大学附属第三医院收治的128例神经根型颈椎病患者作为研究对象,根据随机数表法分为对照组、手法组、针刀组、手法结合针刀组,各32例,4组治疗方案疗程均为3周。比较4组视觉模拟评分法(VAS)评分、颈椎曲度、肌电图以评估临床疗效。结果:4组患者治疗后的VAS评分均低于治疗前(P0.05);手法组、针刀组、手法结合针刀组上述指标的改善程度均优于对照组(P<0.05),手法结合针刀组优于手法组、针刀组(P<0.05)。结论:三维调颈手法、针刀、三维调颈手法结合针刀3种治疗方案均能改善神经根型颈椎病患者的症状、颈椎生理曲度及患肢神经功能,手法结合针刀治疗疗效优于单纯手法与针刀治疗。

关键词：神经根型颈椎病三维调颈手法针刀疗法肌电图颈椎生理曲度