万家寨水利枢纽金属结构安装监理测量

介绍了万家寨水利枢纽金属结构安装监理测量方法和测量数据计算方法，通过实例说明了金属结构安装的测量精度，可为同类型的水利枢纽金属结构安装监理测量提供参考。     

用高精度重力测量检测地壳运动的方法与实践

无论何时，垂直位移都是值得重视的，纯几何测量如ＧＰＳ，ＶＬＢＩ等在检测和解释如隆升，沉降等地球动力学现象方面是不完善的，现在精密的绝对重力测量已经可以在通常的条件下成功地用于这方面的研究，然而用研究区域或局部范围的地球动力学现象所做的密集的野外相对重力测量仍不能完全由绝对重力测量来代替，重力测量的基本优点在它联合卫星 传统的的经典大地测量所显示出来的“整体效应”它将高程与重力变化结合在一起，使四维     

桩基动力检测方法中的若干问题

目前桩基动力检测的研究的非常活跃，方法很多，但在判断桩的质量及其承载能力的可靠性和准确性方面，还常常会有一些争议，本文就若干问题谈谈看法，并明确指出，选择适当的仪器，获取准确的信息，积累并对比动、静试验资料，深化认识，完善分析，是发展动测方法的关键。     

赤峰—通辽地区最小完整性震级分析

使用中国地震台网1970—2022年赤峰—通辽地区（116°—124°E,41°—46°N）地震目录,分别采用最大曲率法、拟合度检测法和震级—序号法计算研究区域不同时间段最小完整性震级Mc,计算结果基本相互吻合。在地震事件较少的情况下拟合度检测法结果偏大,最大曲率法计算结果整体看要小于其他两种方法。     

高效液相色谱-荧光检测同时测定污泥中7种氟喹诺酮类抗生素

为了监测污泥中氟喹诺酮类抗生素(FQs)的含量和水平,建立了基于固相萃取高效液相色谱荧光检测法测定污泥中7种FQs的分析方法。污泥样品选用乙腈∶磷酸盐缓冲液(1∶1,V∶V)(pH=3)提取,以亲水亲油平衡(hydrophilic-lipophilic balance, HLB)小柱净化富集,经甲醇洗脱、浓缩后用高效液相色谱荧光检测器(HPLC-FLD)检测,采用乙腈/0.1%的甲酸作为流动相并以外标法定量。FQs在0.005～1.0 mg/L浓度范围内呈现良好线性关系,R2为0.992 7～0.999 8。添加量为0.05、0.5和1.0 mg/kg时,污泥中7种氟喹诺酮类的加标回收率为78.3%～106.4%,其相对标准偏差为3.68%～12.06%(N=5)。方法的检出限为0.001～0.01 mg/kg,方法定量限为0.004 6～0.038 4 mg/kg。用该方法对北京地区3个污水处理厂活性污泥样品中7种FQs进行分析,检出浓度范围为未检出至1.09 mg/kg。     

被碳氢化合物污染的土壤的检测方法

石油开采业,石油加工业和石油运输业的生产与运行对周围环境都有强烈的影响。除了石油产品之外,许多其它含碳物质都是污染要素。目前采用的污染评价方法都要求用有机溶剂从样品中萃取污染物。由于不同能完全萃取,所以对污染的测定未必准确。通过土壤反射性能评价石油污染的方法,仅能近似地测定污染值。我们认为,通过样品在氧气或者空气流中燃烧时释放的碳酸气数量计算有机碳含量,测定石油产品和其它含碳物质污染土壤的方法是地     

腹泻性贝毒的高效液相色谱法测定条件改进及其运用

对腹泻性贝毒的高效液相色谱测定方法的条件进行改变，使原来对实验条件要求苛刻的方法更适宜于一般的实验室使用，使其有可能替代国内目前常用的小鼠生物方法。井成功地运用于冬季大连海域贝类腹泻性贝毒的检测，首次报道了大连地区海域贝类腹泻性贝毒的主要成分大田软海绵酸的含量，其结果是2000年1—3月大连地区海域贝类腹泻性贝毒除个别海区外一般都末检出。     

Comparative study on in vitro transformation of paralytic shellfish poisoning (PSP) toxins in different shellfish tissues

Dissected tissues of three shellfish species,the Chinese scallop,Chlamys farreri,Manila clam,Ruditapes philippinarum,and Razor shell,Solen strictu were evaluated for in vitro transformation of paralytic shellfish poisoning(PSP) toxins. Tissue homogenates were incubated with extraction from toxic algae Alexandrium minutum to determine toxin conversion. The effects of heating and addition of a natural reductant(glutathione) on toxin conversion were also assessed. The toxin profile was investigated through high performance liquid chromatography with fluorescence detection(HPLC-FLD) . The evident variations in the toxin content were observed only in Chinese scallop viscera homogenates. The concentration of GTX4 was reduced by 45%(approximately 0.8 μmol/dm 3 ) and 25%(approximately 1 μmol/dm 3 ) for GTX1,while GTX2 and GTX3 increased by six times(approximately 1 μmol/dm 3 ) and 3 times(approximately 0.3 μmol/dm 3 ) respectively. Simultaneously,the total toxicity decreased by 38% during the 48 h incubation period,the final toxicity was 20.4 nmol STXeq/g. Furthermore,heated Chinese scallop viscera homogenates samples were compared with non-heated samples. The concentration of the GTX4 and GTX1 was clearly 28%(approximately 0.53 μmol/dm 3 ) and 17%(approximately 0.69 μmol/dm 3 ) higher in heated samples,GTX2 and GTX3 were four times(0.66 μmol/dm 3 ) and two times(0.187 μmol/dm 3 ) lower respectively. GSH(+) Chinese scallop viscera homogenates samples were compared with GSH(-) samples,the concentration in the GTX4 and GTX1 was 9%(approximately 0.12 μmol/dm 3 ) and 11%(approximately 0.36 μmol/dm 3 ) lower respectively,GTX2 and GTX3 was 17%(approximately 0.14 μmol/dm 3 ) and 19%(approximately 0.006 μmol/dm 3 ) higher respectively. In contrast,there was a little change in the concentration of PSP toxins of Manila clam and Razor shell tissue homogenates. These observations on three shellfish tissues confirmed that there were species-specific differences in PSP toxins transformation. PSP toxins transformation was more pronounced in viscera tissue than in muscle tissue. PSP toxins was possibly interfered by some carbamoylase enzyme,and the activity in Chinese scallop viscera tissue is more remarkable than in the other two species.     

用薄层色谱-火焰离子检测法分析南极艾理斯峡湾沉积物中的类脂化合物

薄层色谱-火焰离子检测器测定类脂化合物具有快速、简便的特点,所以被广泛用来鉴别、测定类脂化合物。对存在于海水、海洋有机体和沉积物中的复杂类脂化合物的混合体,只要采用合适的有机溶剂系统,就能对类脂化合物进行鉴别和测定,得到比较理想的结果。 本文的分析数据,是在戴维斯站的实验室里得到的。