浓度

The results showed that sevoflurane was the most prevalent volatility halogenate anesthetics and had the highest concentration at sampling areas. All study hospitals exceeded the exposure limit for halogenate anesthetics (2ppm) recommended by NIOSH (National Institute for Occupational Safety and Health).The median level of N2O at the two medical centers was 1.87 ppm. Although regional hospitals seldom use N2O, its concentration was very high (median 120.85 ppm).

结果显示，Sevoflurane为使用最多之挥发性卤化麻醉剂，环境浓度亦最高，各医院均有高於NIOSH对於单一卤化麻醉剂暴露建议值(2ppm)的情形；医学中心笑气浓度之中位数为1.87 ppm，然区域医院虽极少使用笑气，环境中位数浓度高达120.85 ppm，有管路或开关阀泄漏之可能性。

Compound 5 showed higher effect than eugnol, with the minimal inhibiting concentration for Alternaria brassicae and Rhizoctonia cereali being 0.125mg/mL, and minimal inhibiting concentration for Helminthosporium turcicum Pass, gloesporum fructigenum and Alternaria alternata being 0.0625mg/mL, compared with the antimicrobial activity of clove oil, the MIC respectively reduced by 60% and 90%.

化合物5对玉米大斑、葡萄炭疽和番茄黑霉的最低抑制浓度为0.125mg/mL，对白菜黑斑、小麦纹枯的最低抑制浓度为0.0625mg/mL，分别比丁香油的最低抑菌浓度降低了60%和90%。

The kinetic behaviors of ethylene homo- olymerization and ethylene / l-hexene co-polymerization , catalyzed by the metallocene catalyst PS-DVB-MC in an 0.5 L stainless steel reactor , were studied. The effects of polymerization conditions on ethylene polymerization , such as concentration of catalyst , temperature of polymerization , pressure of ethylene , molar ratio of AI / Z r , etc ., were also investigated . Some leading results were as follows : the activity of the catalyst PS–DVB- MC for ethylene homo-polymerization was high ( 1.053 x 107 gPE / mol Zr·h ), but the molar ratio of AI / Zr was low ( 350:1 ); the catalytic ability for ethyleneα-olefin ( such as l hexene etc .) co-olymerization was great , and the corresponding activity come up to a maximum of 1.753 x 107 gPE / mol Zr·h while concenlration of l-hexene was 0.080 mol / L ; the molecular weight of polyethylene was about 180,000 , meanwhile the molecular weight distribution was narrow ( 2.19 ); the bulk density of polyethylene and ethylene / l-hexene co -polymer were 0.25 and 0.34 respectively .

采用0.5L高压不锈钢反应釜，对催化剂PS–DVB-MC催化乙烯均聚和乙烯/ l-己烯共聚合的动力学行为进行了研究，详细考察了催化剂浓度、反应温度、压力、Al/ Zr比、1-己烯浓度等因素对乙烯聚合反应的影响，得到如下主要结论：催化剂PS-DVB-MC具有催化乙烯均聚的高活性(1.053×107g PE / mo1 zr.hr)，低Al / Zr比( 350：1 )；具有良好的催化乙烯与α-烯烃(如1-己烯等)共聚的能力，在1-己烯浓度为0.080 mol / L时，催化活性达到最大(1.783×107 g PE / molZr.hr)；乙烯均聚产物的分子量在18万左右，分子量分布窄( 2.19 )。

In the slow sorption stage, variations in sorption ratio in humic acid fraction was very small, and the influence of original concentration of phenanthrene was slight ; while for humin fraction, the sorption ratio of phenanthrene at lower initial concentration was significantly higher than at higher one, in addition, the sorption ratio showed a gradually increasing trend, indicated humin fraction as the main domain in charge of the slow sorption.

在慢吸附阶段，胡敏酸中菲的吸附比例变化很小，菲初始浓度的影响也不大；而对于胡敏素组份，低初始浓度条件下菲的吸附比例明显大于高初始浓度条件，并呈现逐步增加的趋势，表明胡敏素组份是慢吸附的主要发生域。

For anti-oxidation properties, methanolic extracts from fruit bodies and mycelia showed excellent scavenging ability toward DPPH (1,1-diphenyl-2-picryl hydrazyl)(96% at 15mg/mL) and good potential in reducing ability at the concentration of 2.5 mg/mL and chelating effect on ferrous ion (about 82% and 77% for extracts from mycelia and fruit bodies, respectively) at the concentraction of 2.5 mg/mL.

在抗氧化性质方面，结果显示子实体和菌丝体的甲醇萃取物在浓度为15mg/mL时，对DPPH（1，1-diphenyl-2-picryl hydrazyl）自由基清除率高达96﹪和89%，在浓度为2.5mg/mL时就具有好的还原能力，菌丝体和子实体甲醇萃取物在浓度於2.5 mg/mL时，对铁离子螯合能力分别达82﹪和77﹪。

The changes of total nitrogen and total phosphorus concentration in solutions with total saccharides released by two kinds of algae,the Hydrodictyon reticulatum in artificial culture medium and the microalgae in a medium whose nutrient is supplied by bed mud from lakes,were studied respectively.

分别研究了水网藻在人工培养液培养下，微藻在以湖底泥为营养源培养下，藻代谢总糖浓度与溶液中总氮浓度、总糖与总磷浓度随培养时间的变化情况，结果表明两两均呈现一种反向变化关系。

The white low-density powder of the the sodium salt of polyaspartic acid was got by dropping the hydrolyzable solution to wiscked high speedly carbinol which Consumption amount is about 3-6 times to the amount of solution, the powders density is about 0.35g/ml.4 Polyaspartic acid was characterized by NMR and IR.5 The scale inhibition behavior of polyaspartic acid was studied and result shows: The calcium carbonate inhibition rate is up to 99% at the dosages of 12.5mg/ Land when pH value is 9.0, Ca2+ concentration is 120mg/L and HCO3- concentration is 366mg/L.6 The primary design was put forward for industrialized production of PASP.

在此工艺下得到聚天冬氨酸钠粉术，外观为白色的轻质粉术，堆积密度0.35g／ml，不用进行脱色和粉碎。 4。用红外光谱和核磁共振谱图对聚天冬氨酸进行了表征。 5。对合成的聚天冬氨酸钠对CaCO_3的阻垢性能进行了研究。结果表明：在Ca~(2+)离子浓度120mg/L(以碳酸钙计300mg/L)，HCO_3~-离子浓度为366mg/L(以碳酸钙计600mgL)，PH值=9.0的条件下，阻垢剂浓度达到12.5mg/L时阻垢率可达99％。

To our knowledge, reverse phase of high performance liquid chromatography was firstly developed to analyze the metabolites of 7-tocopherol with ideal results. Meanwhile, Gas chromatography/Mass chromatography were used to analyze the structures of unknown metabolites of 7-tocopherol and a main unknown metabolite was identified as a side chain ω- hydroxylate of 7-tocopherol.The kinetic results of of 7-tocopherol reacted in the S9 of male SD-rat liver showed that the optimal time was 45 min; the optimal concentration of S9 5 mg/ml; the optimal concentration of NADPH 1 mM; and the optimal concentration of 7-tocopherol 8 μg/ml. The result of γ-tocopherol metabolized in the S9 of male SD-rat was the best; male Brazil turtle better; and male cobia worst.

本试验首次确立了γ-生育酚代谢物的RP-HPLC分析方法，结果理想且重现性好；用GC／MS对γ-生育酚的未知代谢物结构进行分析，判断其中一种主要的代谢物为γ-生育酚侧链初级羟基化代谢物；γ-生育酚在雄性SD-大鼠肝S9的代谢动力学表明，本实验条件下代谢反应的最佳时间为45min，S9浓度为5mg／ml，NADPH浓度为1mM，γ-生育酚浓度为8μg／ml；发现γ-生育酚在雄性SD-大鼠肝S9中代谢最高，雄性巴西龟次之，雄性军曹鱼最低。

Hydrogen sulfide was aspirated to a midget impinger containing absortant solution and analysed by spectrophotometric method.

结果显示，龙凤谷、硫磺谷之环境空气硫化氢浓度范围从无法测得到2.42mg/m3，其硫化氢浓度远高於一般生活环境，且有82%的空气样本浓度高於硫化氢之中华民国环境空气品质标准0.1ppm。

Methods In selecting incept concentration of taking of sensitivity, to do mix-skin-test basing on tradition commend concentration and choosing the best concentration to begin to take of sensitivity.

方法在选择脱敏起始浓度时，在传统推荐浓度的基础上，行混合皮试，择取最佳浓度开始脱敏

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！