起始的

Ugi-4CC(four-component condensation) reaction is one of isonitrile-based MCR＇s(multi-component reactions), which is started with an amine, an aldehyde, a carboxylic acid and an isocyanide, after one-potreaction to produce a compound composed of the whole four starting materials.

Ugi-4CC四组份缩合反应是基于异腈的MCR＇s之中一类，它以异腈、羧酸、醛、胺为原料，可经一罐反应缩合生成由四种起始物共同组成的产物。

The students' level of listening depends on the linguistry basis.

因此起始阶段训练学生音素和单词时，1）要注意听辨发音相似的易混淆的因素、字母、单词、数词等。

A efficient stereo-controlled synthesis of the key fragment of the mother spiroketal moiety of the HIV-1 protease inhibitor didemnaketals was achieved through nine steps from the natural --menthone.

五、以天然L--薄荷酮为手性起始原料，分别经过九步化学转化合成了抗艾滋病活性的Didemnaketals类化合物母体螺环部分的关键组成片段。

This supports that spinal proinflammatory cytokines are important in both the initiation and maintenance of neuropathic pain.

这证实了脊髓的致炎细胞因子在神经性疼痛的起始跟持续中起着重要作用。

Methods Forty rats were randomized into normal control group and FS group. The normal control group was fed with conventional forage. FS group was fed with dry forage mixed with FS powder for 3 months, the preliminary dose of FS was 200 mgkg^(-1)d^(-1) and then increased progressively by l00 mgkg^(-1)d^(-1) to ensure over half of the rats having diarrhea, and the final dose was 2800 mgkg^(-1)d^(-1). The frequency and amplitude of colic slow wave were detected and the changes of myenteric plexus and ICC were observed by zinc iodide -osmic acid staining method.

方法］SD大鼠40只，随机分为2组：正常对照组、番泻叶组（饲以含番泻叶粉的乾饲料，起始剂量为200 mgkg^(-1)d^(-1)，以100 mgkg^(-1)d^(-1)剂量递增，保持对半数以上动物有泻下作用，连续3个月，终剂量为2800 mgkg^(-1)d^(-1)，检测大鼠结肠慢波的频率及振幅，采用碘化锌－锇酸法观察肌间神经丛及ICC变化。

OxazoleⅠand methyl oxazole Ⅱ,key intermediates of leucamide A which is a natural ocean material,were prepared from L-serine,L-alanine and L-threonine by two different methods.

以L-丝氨酸、L-丙氨酸和L-苏氨酸为起始原料，采用两种不同的方法分别合成了天然海洋化合物Leucam ide A的关键中间体口恶唑化合物Ⅰ及甲基口恶唑化合物Ⅱ。

Starting from 4-androstenedione, three novel 3-oxo-4-aza-5-androstene-17-oxime derivatives 7, 8 and 9 were synthesized through oxidation ring cleavage, amination ring closure, oximation,and substitution .

以4雄烯二酮为起始原料，经过氧化开环、氨解闭环、肟化、取代等4-步反应，合成了3个新的3-羰基-4-氮杂-5-雄甾烯-17肟衍生物7、8和9，并用质谱、1HNMR、13CNMR等测试手段对目标化合物的结构进行了表征

In the part one, we reported a novel method for the synthesis of phenacyl esters by reaction of carboxylic acids with α-bromoacetophenone promoted by potassium fluoride.

论文的起始部分系统地综述了近些年来离子液体中各类烷基化反应和各类缩合反应的研究。

Study based on field research and sprout experiment shows ecological effects of base style, illumination depth of water and picking seedling to Potamogeton crispus L.

水深的增加可显著延长萌发起始时间，但不改变休眠芽的最终萌发率。

Methods 10 adult arms were pured latex into artery microanatomized and observed the dorsal branch of anterior interosseous artery's originate、diameter、length and distribution of skin branch and periosteum branch.

10侧成人上肢标本经肱动脉灌注乳胶后，对其骨间前动脉背侧支的起始部位、口径、长度及其皮支、骨膜支的分布进行显微解剖观察。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。