查询词典 l

With the development of linear operator hypercyclic theory, We get some equivalent conditions about weighted sequence, on which weighted shift operator in l~2 and l~2 become hypercyclic.

随着线性算子超循环性理论的发展，对于空间l~2和l~2中的加权移位超循环算子已经得到了许多利用加权序列所作的等价刻画。

In industrial production, the solution can circularly leach silver chloride 11 times when the concentration of sodium sulfite is 2mol/L and the concentration of silver ion is 30g/L after every leaching process.

结合工业生产，确定了亚硫酸钠浓度为2mol/L，控制每次浸出液中银的浓度为30g/L时，亚硫酸钠溶液可以循环浸出氯化银11次。

The synthesis of the pentacyclic skeleton of Et-743 and the construction of the five chiral centers thereof.1. The core pentacyclic skeleton of phthalascidin was constructed with L-dopa as the starting material via thirteen steps. First, two basic synthons, the C-1 functionalized tetrahydroisoquinoline compounds 8 and N-protected Z-dopa derivative 9, were prepared from L-dopa. They were coupled via amide bond to form the dipeptide compounds 10, which were the first key intermediates. Then the primary hydroxyl groups were transformed into the corresponding amino aldehydes 11 via Swern oxidation. Followed by the intramolecular Pictet-Spengler cyclization, the pentacyclic compounds 12 were synthesized.

五环骨架的构建及五个正确手性中心的确立：1.1我们以L-多巴为起始原料，经过多步官能团保护和转化合成了基本结构单元8然后和苯丙氨酸衍生物9，通过缩合反应生成酰胺中间体10，经Swern氧化得到醛化合物11，然后再次利用分子内改良的Pictet-Spengler反应一步构建c，d两环，得到五环骨架化合物12，最后，实现了21-位羰基向氰基的转化，得到了C-1位官能化的化合物14，化合物14不但具有和Et-743一致的五环骨架，而且分子中五个手性中心立体构型也与其完全相同：其中，3，位和13，位的手性中心由原料L-多巴带入，而1，位，11，位和21，位手性中心则通过不对称诱导而确立。

E ., carrgeenin gum 7 g/L, Ph 5.8-6.0 and light intensities 2000-3000 lx, were proper to the proliferation and development of axillary buds. The brown could he restrained effectively when the Vc(0.05 g/L.) was supplemented in the proliferation medium. The GA3 was not suitable for the proliferation of axillary buds of slash pine.

当卡拉胶为7 g/L、pH为5.8~6.0、光照度为2000~3000 lx时有利于湿地松丛生芽的增殖和生长；培养基中添加抗坏血酸0.05 g/L能有效抑制湿地松丛生芽增殖过程中褐化物质的产生，而赤霉素的添加则不利于湿地松丛生芽的增殖和生长。

In the low B condition of the soilless culture, rapeseed seedlings were short of B, the seedlings were short and the leaves were malformed and the weight of the shoots decreased, the branch roots were fewer and snuff color, the weight of roots decreased, and the length of root and the ratio of shoot/root decreased, too. However, the high B- efficiency type of rapeseed had the a great ability to the low B stress, the growth of shoots and roots were better than the low efficiency, and the B concentration range of the rapeseed varieties which responded to the B scarce was 0.001 mg/L to 0.01 mg/L.

营养液培养条件下，苗期缺硼，甘蓝型油菜植株瘦小，叶片皱缩，地上部生长量下降；侧根少且呈现黄褐色，根重、根体积、根长以及根冠比下降；高效品种具有较强的耐低硼胁迫的能力，表现为同等缺硼条件下，对高效品种地上部和根系生长的抑制作用都相对较小，且品种间对缺硼反应差异最大的硼浓度范围为0.001mg／L—0.01mg／L。

Those results are obtained on the framework of of Sobolev space H~l and theregularity index is required to be high (l＞1+d/2,l∈Z) when one deals with them byclassical analysis methods.

在本章中，我们将研究指标的极限情形l=1+d／2。

The control group drank tap water,the other three groups drank 2.72 mg/L,13.6 mg/L and 68 mg/L solution of sodium arsenite for 3 months.

对照组饮用自来水，砷暴露组分别饮用2.72，13.6和68 mg/L亚砷酸钠溶液。

With an effective length of 30 cm. The running buffer was a mixture of 25 mmol/L sodium borate and 100 mmol/L boric acid (pH 8.6). Effective mobilities of the two medicines changed with altering the concentration of β-cyclodextrin.

所用未涂层熔融石英毛细管的规格为内径50 μm，总长37 cm，有效长度30 cm，电泳缓冲液为25 mmol/L硼砂+100 mmol/L硼酸(pH 8.6)，并加入不同浓度的β-CD。

The background electrolyte was a 75 mmol/L sodium borate solution adjusted to pH 9.7 with 0.1 mmol/L NaOH solution. The detection wavelength was 228 nm and a voltage of 14 kV was applied. The Forsythia suspensa Vahl was extracted by water and a set of CEFP containing 29 peaks was obtained.

中文内容：摘要：采用毛细管区带电泳法，以75 mmol/L硼砂溶液(用0.1 mmol/L氢氧化钠溶液调pH 9.7)为背景电解质，运行电压14 kV，检测波长228 nm，重力进样15 s(高度9 cm)，建立了连翘药材的毛细管电泳指纹图谱。

The factors relevant to the running buffer and their effects on separation were investigated. The buffer solution composed of 30 mmol/L sodium borate and 2.4 mmol/L β-CD was found to be the most suitable electrolyte for separation. The second order dissociation constant range of honokiol was estimated. The content range of honokiol in Cortex Magnoliae Officinalis and was 3.42-5.98 mg/g, while the mean content of honokiol in its preparation 0.021 mg/mL.

优化了厚朴提取物的分离条件，考察了缓冲溶液浓度、pH 值、β-CD的添加浓度对分离的影响，确定了最佳的分离缓冲溶液组成为30 mmol/L 硼砂和2.4 mmol/L β-CD，pH 值为9.48；推测出和厚朴酚的二级离解常数pKa2 的范围为9.94-10.83；在优化的分离条件下，测定了厚朴药材和藿香正气口服液中和厚朴酚的含量分别为3.42-5.98 mg/g、0.021 mg/mL，和厚朴酚的线性范围是0.020-0.405 mg/mL，其线性相关系数R=0.998(n=5)，加样回收率为98.4-103.5%，RSD 为3.2-5.7%(n=3)。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。