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The concentrations of cosmogenic nuclides ~(10)Be and ~(26)Al recorded the messages of exposure time and denudation rate on the denuded surface.

宇宙成因核素10 Be和2 6Al的浓度记录着岩层剥蚀面的暴露时间和岩石剥蚀速率等信息。

The different explants, hypocotyl, terminal bud, cotyledonary node, seedling were studied to induce bud or callus with different concentrations of 6-BA and to establish a better system for transformation.

利用大豆不同品种的下胚轴、顶芽、子叶节、原位再生等几种外植体进行诱导植株再生的实验,并通过添加不同浓度的6-BA来观察诱导愈伤组织和出芽的情况,为下一步的转化实验建立一个良好的组培平台。

Butadiene was polymerized to some extent in the presence of binary catalyst system NdCl33iPrOHAlEt3 in toluene and the allylchloride was then added to the solution in order to cyclize the formed polybutadiene and cyclopolymerize the unreacted butadiene monomers.

采用NdCl3·3i-PrOH-AlEt3稀土催化剂进行丁二烯的顺式聚合,在聚合过程中引入烯丙基氯,进行分子内环化反应以及单体的环聚反应。考察了稀土催化剂用量、n/n(AlEt3)、环化时间、反应温度、单体浓度等对环化反应的影响,并对产物进行了红外光谱、核磁共振光谱的表

Using W-HMS molecular sieve synthesized from the tungsten source of (NH4) 2WO4 as catalyst and hydrogen peroxide as oxidant, the effects of reaction time, temperature, dosage of catalyst, solvent type and volume, and oxidant concentration on the catalytic oxidation of cyclopentene to glutaraldehyde were investigated.

对以(NH4)2WO4为钨源合成的W-HMS分子筛为催化剂,过氧化氢为氧化剂,环戊烯合成戊二醛的多相催化反应进行了研究,考察反应时间、反应温度、催化剂用量、溶剂种类和用量以及氧化剂浓度等因素对戊二醛收率的影响。

The comprehensive evalucation resulted in a strong drought resistance group including ZXY04P-201、ZXY03P-227、ZXY03P-122 and ZX Y04P-136, a weak drought resistance group including ZXY04P-101、ZXY04P-89,ZXY04P-239 and a intermediate group including the others according to the the above indicators. 3. The results of study on drought mechanism for 4 Dactylis glomerata L. under continuously water stress and rewatering show: the water saturation deficit of leaves arose hastily, and ZXY04P-239 changed most obviously while ZXY04P-201 changed only slightly under drought stress. ZXY03P-173 and ZXY04P-201 increased in the relative plasmalemma permeability and the soluble sugar content while thant of ZXY04P-75 and ZXY04P-239 showed the trend of initial increasing, reaching the peak at the 8th day, then decreasing under drought stress.

20份鸭茅种质幼苗期抗旱性研究表明,干旱胁迫条件下,所有材料的株高、生物量显著下降,叶片脯氨酸和可溶性糖作为重要的渗透调节物质,其含量迅速增加,质膜相对透性的数值变大,细胞膜受伤害程度增大,水分饱和亏缺值变大,植物保水能力变弱,胞间CO2浓度增大;净光合速率、蒸腾速率、气孔导度和叶绿素含量等指标测定值减小,通过20份鸭茅种质苗期抗旱性综合评价,发现ZXY04P-201、ZXY03P-227、ZXY03P-122、ZXY04P-136属强抗旱性材料,ZXY04P-101、ZXY04P-89、ZXY04P-239属弱抗旱性材料,其他属于中等抗旱性材料。

Using microorganism fermentation cultivation technique, with escherichia coli strains of ASP - 311 for fermentation, with rich fumaric acid as the substrate to ferment produce l-aspartic acid, Study the result of activated carbon, and the temperature, the use of bleaching time and discoloring pH value of various conditions, aspartic acid decoloring effect, and finally: the concentration of carbon, decoloring temperature of 1.0% 60 degrees, the bleaching time for 0.5 h, pH for 6, in this condition, the result is the absorbency of decolour 3.2%, to achieve the best effect.

本文利用微生物发酵培养技术,以大肠杆菌ASP-311为发酵菌株,以富马酸为底物来发酵生产天冬氨酸;研究了发酵液中活性炭的使用量、脱色的温度、脱色的时间以及pH值等各种条件对L-天冬氨酸脱色效果的影响,最终得出:活性炭的浓度为1.0%,脱色温度为60℃,脱色时间为0.5h,pH为6,在此条件下,发酵液的吸光度为3.2%,此时的脱色效果达到最佳。

The average recover rate is 95.4% and RSD is 3.5%. The average content of sciadopitysin is0.147%(RSD is 2.86%). 5.The technology to rich the total flavonoids in branches and leaves of Taxus yunnanensis. Methods:(1) To extract the sample by sonication;(2) Study the technology of extract and defat with L9 (3~4) orthogonal test;(3)Study the process of purification by macroporous resin: containing resin type, liquor concentration, the category and quantity of eluant.

云南红豆杉中总黄酮富集工艺的研究方法:(1)确立用超声法初提药粉;(2)用L9(3~4)正交试验考察脱脂和醇提的工艺参数;(3)用大孔树脂研究总黄酮的富集工艺:考查树脂类型、上样液浓度、洗脱曲线等。

Some important control parameters,including the concentration of samples,the pumping rate,the ultrasonic intensity and dispersion time,and the selection of the deflocculant,are optimized for the establishment of a standard operation process for soft clay.

采用马尔文公司生产的Mastersizer Micro(MAF5000)激光衍射粒度仪测定江苏连云港地区软土的粒度分布,对样品质量浓度、泵速、超声波强度与时间、分散剂选取等控制参数进行了优化设计,确定合适的控制参数,便于对相同类型的软土测量确定标准操作规程。

By flue gas of 2000m〓/h, some normal wastes (seawater, fly ash of power plant, basic waste water, etc) and lime are used on the research of dry, semi-dry, and wet FGD and its corresponding pressure and temperature decrease on stuffing tower, the effect of Ca/S ratio, inlet SO2 concentration, inlet flue gas temperature, and L/G ratio on desulfuration efficiency is analyzed, the instrument of dehumidify was studied by experiment and appropriate instrument of dehumidify was chosen.

在浙大热能所大约相当于1吨/小时出力的锅炉的尾部烟道上的多功能传热除尘脱硫一体化试验研究装置上,利用海水、电厂灰、碱性废水和石灰开展了半工业性的干法、半干法、湿法烟气脱硫研究,分析了Ca/S比、进口SO〓浓度、进口烟温、喷水量等因素对脱硫效率的影响,并探讨了湿法烟气脱硫中的烟温问题,对湿法烟气脱硫反应塔的阻力特性和除湿装置进行了试验研究,选取了合适的除湿元件。

Lagenarium was higher 60%(for example, Glycyrrhiza yralensis, Lycium barberum and Desmodium styracifolium) as the concentration 0.01g/ml. Especially, the G. yralensis showed the strongest inhibitory effect on it with inhibitory rate of 99.6%. The inhibitory rate of 12 PE against mycelium growth and 15 PE against appressorium formation of C.

供试提取物在质量浓度为0.01 g/ml条件下,甘草、枸杞、金钱草等11种植物的80%乙醇提取物对黄瓜炭疽病菌分生孢子萌发的抑制率大于60%,其中甘草的抑制作用最强,达99.6%;12种提取物对黄瓜炭疽病菌菌丝生长的抑制率大于50%;15种提取物对黄瓜炭疽病菌附着胞形成抑制率达50%。

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推荐网络例句

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!

Several theories about reigniting and extinguishing of the arc have been refered.

本文综合考虑了几种电弧重燃和熄灭理论。