The herbicidal activity of the toxin to D. sanguinalis was tested by seed germination, the elongation of root and shoot. The needle puncturing leaf assay techniques were used to test the specificity and effect of toxin on photosynthetic pigment content of D. sanguinalis. MS, 1H- and 13C-NMR spectral data indicated that the toxin is helminthosporin. The melting point of the toxin is 225-227℃, and the molecular formula is C15H10O5. The toxin had inhibitory effect on elongation of D. sanguinalis root. At 150 μg/mL concentration, the inhibition of the toxin to root elongation reached 44.59%.
Scop生防菌画眉草弯孢霉Curvularia eragrostidis菌株QZ-2000的生物活性物质以及评价该物质是否具有作为生物源除草剂的潜力，利用生物测定为导向的色谱分离、质谱和核磁共振波谱技术对该菌分泌的毒素进行了分离和鉴定，利用种子萌发、胚根和芽生长的抑制及离体叶片针刺法测定了该毒素对马唐的毒害作用，并测定了毒素的专化性及毒素对马唐叶绿素含量的影响。
There was a consistent relationshipbetween effect-site sevoflurane concentration and spectral entropy(median absolute weighted residual = 11.6%).
七氟醚效应位点浓度与熵之间存在着一致的关系(绝对加权剩余中位数= 11.6%)。
The decision was based on spectral measurements by the orbiting Mars Global Surveyor, which showed an unusual concentration of haematite, a form of iron oxide.
决定建立在由围绕火星飞行的火星全球探测器所做出的光谱测量基础上，其中显示了不同寻常的赤铁矿含量。
The biochemical components of the hibernating urine was analyzed with spectral photometry, spectral fluorometry, liquid chromatography, and some characteristics relating to longevity were recognized: 1 A special anti-oxidative stress system: The hibernating urine remained antioxidative capability for over a dozen hours in vitro, and the concentration of lipid peroxides and age pigment-like substances were remarkably low. 2 Several kinds of anti-stress enzymes and antioxidants were observed in urine and serum. The activity of lactate dehydrogenase and creatine kinase in serum were particularly high, reaching 2321 molL and 4524 mol/L, respectively. Antioxidative uric acid was low in serum but highly enriched in hibernating urine. 3 In contrast to normal tortoise, free amino acids in hibernating urine was greatly changed.
用荧光、紫外、全自动生化分析和液相色谱进一步分析冬眠乌龟体液和尿液中的生化成分，发现了一些与长寿密切相关的特点：1、具有独特的抗氧化特性：冬眠状态乌龟尿液在体外十几个小时内有抗氧化功效；冬眠乌龟尿液中脂过氧化物水平和老年色素类代谢垃圾物质水平都很低。2、冬眠乌龟尿液和血清中都含有多种有特殊功效的生物酶类和抗氧化物质：例如，血清中乳酸脱氢酶和肌酸激酶含量特别高，分别达2321 mol/L和4524 mol/L；抗氧化剂尿酸在血清中浓度较低，而在尿液中浓度大大提高。3、与正常乌龟相比，冬眠状态乌龟尿液中游离氨基酸成分发生了较大的变化。
In this paper, the experiment results in the strength of two spectral series depending on the concentration of sensibilizer Terbium have been analysed.
可见对于铽的绿色谱线而言，铽离子本身也会起一种敏化作用。据此，我们提出了三价铽离子具有自敏化效应的观点，来解释上述的实验结果，这种观点是：在含有较高浓度铽离子的磷光体中，铽离子既是绿色辐射的发光中心，又是它的敏化中心。
Taking advantage of measured ASD hyperspectral data, we synchronized obtained crop parameters data and Cd content data of farm soil in several time phase of growing season of rice. The response relationships between potential sensitive spectrum remote sensing indices and physiological ecology parameters in Cd pollution stress were analyzed, such as leaf pigment concentration, water content, cell structure and leaf area index. Then the corresponding diagnosis spectral indices were determined, including Modified Chlorophyll Absorption in Reflectance Index, Normalized Difference Water Index, Red-Edge Vegetation Stress Index and Ratio vegetation index.
采用水稻生长季节多个时相的ASD实测高光谱数据和同步获取的作物参数与农田土壤镉含量数据，分析镉污染胁迫水稻生理生态参数如叶片色素含量、水分含量、细胞结构和叶面积指数等与潜在敏感光谱遥感指数的响应关系，确定MCARI、NDWI、RVSI 和RVI为相应的诊断光谱指数。
Methods DNA adducts induced by the different concentration of dichloromethane 2.0, 3.0, 4.0, 5.0, 6.0, 7.0 μgμl^(-1 and DNA-DNA strand crosslink induced by the different concentration of dichloromethane (200, 300, 400, 500, 600, 700 μg/30 μg DNA) were determined by ultraviolet analysis and fluorescence spectral analysis.
方法］应用吸收光谱移动法观察不同浓度的DCM(2.0、3.0、4.0、5.0、6.0、7.0 μg/μl)与小牛胸腺DNA的加合作用；应用溴乙锭荧光法对不同浓度的DCM（每30 μg/μl和DNA分别为200、300、400、500、600、700 μg）引起的DNA交联作用。
This paper first analyzes the seasonal difference of chlorophyll a concentration data which were collected from January to October in 2005, and then analyzes reflect-spectral data which were collected synchronous with water sample from April to October in 2005.We divided the time span into spring, summer and autumn, built different models for the three seasons and compared them, so as to build an optimal model for each season.
本文在对2005年1—10月份叶绿素a浓度季节差异进行分析的基础上，对4—10月份同步测量的水体光谱数据分春、夏、秋三个季节进行分析，分季节建立叶绿素浓度反演模型，并对它们进行比较，旨在为各季节选择最佳的反演模型。
We have successfully fabricated the ZnSSeTe-based Schottky barrier photodetectors. The barrier height was lower with increasing the doping concentration. The maximum photoresponse happened at a wavelength of 400 nm, and the responsivity was 0.15A/W. In addition, the maximum transmittance of the ITO film was also at this spectral range.
我们已成功地制造出硫硒锑化锌萧基光检测器，ZnSSeTe 的光感测元件，掺杂浓度越高，元件的位能障碍越低，此光感测元件之响应波段大约在 400nm 时，响应最大为 0.15 A/W，且其 ITO 最大的穿透波段也在此波段。
At the same pump level, using high-concentration Yb-doped fiber would improve the output power greatly, but the pulse shape was distorted. Spectral broadening due to self-phase modulation.
在同样的泵浦功率下，利用高掺杂浓度的掺镱光纤有利于增加放大输出功率，但输出脉冲形状的畸变现象加剧；脉冲放大过程中因自相位调制会引起频谱展宽。
Application of assessment of economic loss of qingdao sea area by concentration-value loss factor Damage Detection of Steel Bridge Based on Acceleration Power Spectral Density
基于浓度-价值损失率法的青岛海域水污染价值损失研究加速度功率谱密度在钢桥损伤检测中的应用
Through theoretical calculations and spectroscopic properties testing, analysis concentration of rare earth and adjustment the glass substrate effect the spectral properties and reveals the mechanism between rare earth ions and substrate materials in fluorophosphate glasses.
通过理论计算和光谱性能测试，分析稀土离子掺杂浓度变化及玻璃基质的调整对光谱性能的影响，揭示氟磷酸盐玻璃中，稀土离子和基质材料的作用机制。
In this paper, normally distributed random numbers are used to simulate spectral data and reference concentration to investigate the probability level of chance correlation from the number of selected wavelengths and different cross validation methods.
本文从算法原理上分析建模方法产生偶然相关的可能性，并采用随机数模拟光谱数据及参考浓度的研究方式进行验证。
Include the vertical distribution of suspended sediment concentration, suspended sediment mass flux and spectral analysis, and the changment of net sediment transport rate and bed load transport rate in the the movement process of sandbar.
内容包括悬沙浓度垂向分布，水质点平均流速垂向分布，悬移质通量及谱分析，还有净输沙率和推移质输沙率在沙坝运动过程中的变化。
A self-absorption correction model based on the information of spectral broadening is introduced to calculate the true value of spectral line intensity, which refers to the elemental concentration.
基于获取的谱线展宽信息，采用一种自吸收校正模型计算了分析谱线的自吸收系数，对光谱强度进行了校正处理。
The relation between spectral line intensity and concentration of the constituent in the presence of self-absorption
有自吸收现象时谱线强度与物质浓度的关系
The pilot research on simultaneous reconstruction of both concentration and temperature distribution with a pair of spectral lines is continued with optimization strategy of cyclic variable method. The research can be useful for the investigation of chemical distribution in the combustion further.
并通过采用扫描两条特征谱线的方法，利用变量轮换的最优化策略，对气体浓度与温度场同时重建进行了初步试验研究，为今后针对于燃烧环境中的气体重建工作提供借鉴。
Formation of fullerene nanoclusters may be responsible for the unusual spectral shift with concentration.
这种异常的光谱位移可能与富勒烯的纳级（10－9）簇的形成有关。
Spectral and concentration curves of components in (R) - 1, 3-butanediol self-association system were resolved. The major part of multimers was determined to be trimer.
成功解析出了（R）-1,3-丁二醇惰性溶液中的自聚集体系的组分光谱和组分浓度，确定了体系的主要聚集体类型为三聚体。
In the near-infrared spectral region, the spectrometer on the concentration of glucose solution signal data acquisition and analysis collected by near infrared spectroscopy signals of the glucose solution to make the signal pre-processing of glucose solution.
在近红外光谱区域，光谱仪对葡萄糖溶液浓度信号的数据采集，并且对采集的葡萄糖溶液的近红外光谱信号进行分析，做出葡萄糖溶液信号的预处理。