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These selected variables were used in the determination of total volatile alkaloids and total nitrogen in tobaccos by partial least squares method.

偏最小二乘法[3]和主成分回归[4]是NIR技术中常用的两种化学计量学方法，曾被认为对噪音信号不敏感，在对庞大的数据矩阵进行处理时不需要变量筛选，但大量的研究工作表明，有效的变量筛选可以改善模型的预测能力和减少模型的复杂程度[5～8]。

In the absence of coorperative effect, the reaction between lectin molecules and their receptors on cell surface can be described as below when equilibrium is reached:In which LT denotes total lectin concentration, LF free lectin concentration, mva-lency of lectin, ni number of receptors with affinity constant Ki to lectin, CT total lectin concentration.

本文提出一个描述细胞与多价凝集素反应的平衡关系式和用紫外分光光度法测定游离凝集素浓度求受体数量及其与凝集素的亲合常数的方便方法。

Firstly, headspace solid-phase microextraction was established to determine AITC by orthogonal design. Extraction temperature, stir speed, extraction time, and desorption time were set at 40℃, 900r/min, 30min, and 5min, respectively. Under these optimal conditions, volatile flavor compounds in mustard oil, wasabi, and 'Chongcai'leaf mustard product were identified by SPME/GC/MS. In these three samples, 6,12,17 constituents were identified respectively; Allyl isothiocyanate was the main flavor compound, which accounted for 73.45%, 64.25%, 32.74% of total volatile compounds, respectively. Carbon disulfide, a hydrolysis product of AITC, accounted for 14.37% 25.40%, 51.67% of total volatile compounds respectively. There were some other isothiocycannates, such as butane, 1-isothiocyanato-, isobutyl isothiocyanate, 1-benzene, 4-isothiocyanato-, benzene (2-isothiocyanatoethyl)-, etc.

首先采用正交实验设计优化固相微萃取技术的前处理条件，结果表明，以萃取温度40℃、搅拌速度900r／min、萃取时间30min、解吸时间5min为最佳条件；在此最优条件基础上，利用SPME／GC／MS联用技术分析芥末油、青芥辣、冲菜的挥发性风味成分，分别检出6、12、17种化合物，主要风味物质均为AITC，相对丰度分别为73.45％、64.25％、32.74％；AITC的水解产物二硫化碳的相对丰度分别为14.37％、25.40％、51.67％；还检测到了其它几种异硫氰酸酯，如异硫氰酸丁酯、异硫氰酸异丁酯、异硫氰酸丁烯酯、2-苯乙基异硫氰酸酯等。

Zheng He fleet is "chop wood for the disk, the book's characters engraved Heavenly Stems and Earthly Branches, the needle floating in water, point to The Spectacle of Boats Sailing" is used in water gyrocompass, the Heavenly Stems, Earthly Branches, baguazhang, formed with the five elements, divided into 20 four different directions, if the needle and then taken into account, a total of 48 directions, each the equivalent of a modern compass azimuth 15 degrees, a total of 360 degrees, which the ancients used to guide navigation course has been quite a precise.

郑和船队是&斫木为盘，书刻干支之字，浮针于水，指向行舟&，用的正是水罗经，有天干、地支、八卦、五行配合而成，分有二十四个不同方位，如果再把缝针计算在内，一共四十八个方向，每一方位相当于现代罗盘的十五度，共三百六十度，这在古人航海中用以指导航向已颇为精确了。

This paper was studied the total sugar, total acid, vitamine C, pigment, amino acids and inorganic elements in black current fruit and the fatty acids in its seed.

对黑穗醋栗不同品种果实中总糖、总酸、维生素C、红色素、氨基酸、无机元素及种子中脂肪酸种类及含量进行了系统研究。

Results The Sanitary Indices of only two sets of air-conditioning systems were qualified according to the national sanitary standards, therefore, only 5 percent of the sanitary indices are op to the standard. And she qualifying rates of PM10, total bacteria count, total epiphyte count are 95.0%, 96.0% and 93.5% respectively. The detecting rate of Legionnaires pneumophile is 56% in 75 samples of cooling water. Hemolytic streptococcus can be found in one sample of the wind delivery and inner surface of blast pipe.

结果 在22家宾馆酒店40套空调系统中，卫生指标均合格的2套，合格率5%；200份空调送风的PM10、细菌总数、真菌总数合格率分别为47.5%、91.5%、83.5%；200份风管内表面的积尘量、细菌总数、真菌总数合格率分别为95.0%、96.0%、93.5%；75份冷却水嗜肺军团菌检出率为56%；空调送风及风管内表面各有一份样品检出溶血性链球菌。

The study showed that there were consistent change of total N and available N contents with alfalfas growing for different lengths of time in 0-1000 cm soil. Soil total N and available N contents decreased with soil depth, and tended to remain relatively constant in soils deeper than 350 cm below soil surface.

结果表明，在0-1000 cm土层，不同生长年限苜蓿草地土壤全氮与碱解氮含量均呈现规律性的变化，即随土层深度的增加，全氮及碱解氮含量下降，350 cm土层以下，变化趋势平缓。

Both adding chlorine Dioxide and erythromycin could result in significant decrease of total coliforms, salmonella and total bacterial in water.

猪粪中的沙门氏菌对罗非鱼有一定的刺激作用，但没有导致罗非鱼的急性反应和大量死亡。

The total number of sewage bacteria and coliforms in the determination of Abstract: In this experiment, by measuring the number of total bacteria and coliforms, to deal with before and after treatment of domestic wastewater for bacteriological testing.

生活污水中细菌总数和大肠菌群的测定摘要本实验通过测定细菌总数和大肠菌群数，对处理前、处理中和处理后的生活污水进行细菌检测。

Features white mesh toe box and white mesh ankle area, the typical swoosh in aqua and a total orange air unit with a Nike Air stitching in a aqua colourway, aqua/total orange outsole.

特色白网网底框和白色的脚踝领域，在Aqua典型的旋风和单位与耐克空军总橙AIR 缝制一个旱厕colourway，旱厕/总橙色底。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。