面向地铁车辆的多胞元铝型材结构压缩吸能特性研究

In this paper,an energy absorption structure of multi cell aluminum profiles for metro vehicles is proposed,which has the advantages of simple form and low cost.Through the combination of experiment and numerical simulation,the characteristics of the structure on energy absorption are studied.The experimental results show that the energy absorption capacity of the structure is stable,and the crushing force is not sensitive to the change of impact velocity.The relationship between the crushing force and the yield strength,the wall thickness of the multi cell aluminum profile is approximately linear

钯－硝酸镁基体改进剂石墨炉原子吸收光谱法测定六味地黄丸中锡

钯-硝酸镁基体改进剂石墨炉原子吸收光谱法测定六味地黄丸中锡杨成隆，庄峙厦，覃事栋，王小如，杨原（厦门大学化学系，厦门，361005）六味地黄丸是我国具有悠久历史的传统中成药，具有滋阴补肾的功能.鉴于目前国内外严格控制中成药微量重金属含量及国家有关部门..

Determination of Trace Mercury in Samples of Traditional Chinese Medicine by Cold-Atom Generation Atomic Spectrometry

本文采用自制电热恒温石英管还原气化冷原子吸收光谱法,直接测定了六味地黄丸中的痕量汞。方法检出限为0.1PPb;回收率为90—98%;相对标准偏差为4.3%。该方法简便,重现性好,准确度高,可用于中成药中痕量汞的测定。Using a homemade device of the electric heated quartz-tube atomizer, including a controlling temperature unit and a continue hydride generator, trace mercury in,samples of traditional chinese medicine (Liu Wei Di Huang Wan) has been determined directly.The method is simple, convenient, and of good precision and high accuracy.It is a very practical method For the analysis of trace mercury.The detection limit is below 0.1ppb, and the recovery is 90-98%

Palladium and Magnesium Nitrate as GFAAS Martix ModiFiers For Tin Determination in Traditional Chiness Drug

本实验建立了钯-硝酸镁基体改进剂石墨炉原子吸收光谱法测定六味地黄丸中锡的方法。研究了基体改进剂的加入方式对测定的影响。方法的相对标准偏差为2.5%，回收率在90%~110%之间，检出限为0.3ng/Ml。本方法可用于中成药中锡的测定。A graphite Furnace atomic absorption spectrometric method For the determination of tin in traditional Chimese drug〃 Liuwei Dihuang Wan〃is described.A mixture of palladium and magnesium nitrate is used as a matrix modiFier.A special procedure For the application of the matrix modiFier has been employed.The detection limit is 0.3ng/mL,and the relative standard deviation is 2.5%,The recovery is in the range of 90%～110%

流动注射—超声雾化器—电感耦合等离子体原子发射光谱(FI-ICP/AES)联用技术同时测定头发中多种元素

建立了 FI-UN-ICP/AES 联用技术,用所发展技术进行了头发中多种微量元素的同时测定。与常规气动雾化器 ICP/AES 技术相比,尽管是用流动注射方法引入样品,测定的检出限仍有较大改进(2—23倍)。多次注射测定的再现性(RSD)在0.6—5.0%范围内。同时进行了标准加入回收试验,获得了很好的结果(90—110%)

Determination of Trace Mercury in Samples of "Liu Wei Di Huang Wan" by Cold-Atom Generation Atomic Spectrometry

本文采用自制电热恒温石英管还原气化冷原子吸收光谱法，直接测定了六味地黄丸中的痕量汞。方法检出限为0·1PPb；回收率为90~98%；相对标准偏差为4.3%。该方法简便，重现性好，准确度高。可用于中成药中痕量汞的测定。Using a homemade device of the electric heated quartz-tube atomizer,including a con-trolling temperature unit and a continue hydride generator,trace mercury in samples of "liuWei Di Huang Wan"has been determined directly.The method is simple,convenient, and ofgood precision and high accuracy.It is a very practical method For the analysis of trace mer-cury- The determination limit is below O.1ppb,and the recovery is 90- 98%'国家教委重点实验室资

一种酿酒用太空芝麻香型白酒专用曲的制备方法

本发明采用太空诱变选育的太空芽孢杆菌、太空酵母菌、太空米曲霉、太空河内白曲，分别按工艺制成太空芽孢菌曲、太空酵母菌曲、太空米曲、太空河内白曲，然后按照太空芽孢菌曲20-30%、太空酵母菌曲10-20%、太空米曲10-20%、太空河内白曲30-60%的比例混合制成太空芝麻香型白酒专用曲。其中，太空芽孢菌曲采用单菌发酵再复配工艺；太空河内白曲采用两步发酵法制曲；太空酵母菌的曲池培养采用了原料灭菌后降温至60-70℃补加糖化酶以提高还原糖的方法；同时增加了太空米曲，进一步提高了芝麻香型白酒专用曲的质量。本法生产的太空芝麻香型白酒专用曲质量稳定，可提高出酒率3-5%，缩短发酵周期3-5天，芝麻香酒特征成分含量提高5-10%，同时酒曲用量可减少2-7%，所产原酒酒体丰满、香气幽雅、芝麻香风格典型

Atomic Spectrometric Determination of Trace Elements in Hair Samples and Study on Preliminary Clinical Diagnostic For Cancer Patients

收集了厦门地区138例非癌症患者发样及64例癌症病人发样。样品经湿法消化后，用电感耦合等离子体原子发射光谱（ICP-AES）法测定其中22种元素含量，用石墨炉原子吸收光谱（gf-AAS）法测定了SE含量，确定了厦门地区不同年龄段、不同性别发样中多种微量元素的含量范围。实验中通过对采样部位、采样方式、样品预处理方法（包括洗涤方法）、消化温度的比较及研究，选择了最佳实验条件，对发样中元素含量的纵向分布进行了初步探讨。实验数据采用化学计量学的主成分分析（PCA）和偏最小二乘法（PlS）等多变量分析方法进行分类处理，建立了癌症初级临床诊断模型，准确率达92.3%。air samples were collected From Xiamen area which include 138 cases of normal people and 64 cases of cancer patients.The samples were analyzed For 22 elements by ICP-AES and For Seby GFAAS aFter a wet digestion.Background value of trace elements in the sarnples For diFFerentages and sexes in Xiamen area were obtained.Experimental conditions were optimized,includingthe sampling position,the sampling method,the pretreatment methods and the digestion temperature of the samples.Concentration distribution along the growing length was also discussed.The results were treated with of PCA and PLS methods in order to distinguish cancer patientsand normal people.A preliminary clinical diagnostic model was established with a validity of92.3%.厦门市科委三项科研基