查询词典 2-butene

We have designed and synthesized 9,9'-spirobifluorene-based materials and introduced different functional group at 2,2' and 2,2',7,7' positions of 9,9'-spirobifluorene. All of these obtained materials adopted a bichromophoric system configured orthogonally via a chiral spiro center.

中文摘要以旋环双芴为核心结构，分别在2，2'与2，2'，7，7'位置引入不同基团，设计合成出ㄧ系列具双共轭的材料，两相正交相互独立的共轭链，使分子具光学异构物，可避免分子堆叠，提高热稳定性。

We have designed and synthesized 9,9'-spirobifluorene-based materials and introduced different functional group at 2,2' and 2,2',7,7' positions of 9,9'-spirobifluorene. All of these obtained materials adopted a bichromophoric system configured orthogonally via a chiral spiro center.

以旋环双芴为核心结构，分别在2，2'与2，2'，7，7'位置引入不同基团，设计合成出ㄧ系列具双共轭的材料，两相正交相互独立的共轭链，使分子具光学异构物，可避免分子堆叠，提高热稳定性。

In this serises,21 cases had facial paralysis,19 cases with suppurative labyrinthitis.3 cases with meningitis, 17 cases with periauricular abscess, 17 cases with postauricular fistula,4 cases with otogenic meningitis brain absess, 2 cases with lesion of sigmoid sinus and,1 cases with influence under temporalis,1 case with neck abscess,I case with mandible arthritis.

结果74例患者中单项并发症者62例(83.8%)，2项并发症者12例(16.2%)，并发症总计86例次：其中周围性面瘫21例次(24.4%)，迷路炎19例次(22.1%)，脑膜炎3例次(3.5%)，耳后骨膜下脓肿17例次(19.8%)，耳后瘘管17例次(19.8%)，脑脓肿4例次(4.7%)，乙状窦病变2例次(2.3%)，颞肌下感染1例次(1.2%)，颈部脓肿1例次(1.2%)，下颌关节炎1例次(1.2%)。

RESULTS: The time of misplacement of pedicle screw was 5-69 days with an average time of 18.5 days, including 7 cases of screw penetrating into lateral cortex, 4 of screw penetrating into medial cortex, 2 of screw penetrating into pedicle cortex, 2 of overplacement, 2 of intervertebral foramen placement and 2 of intervertebral space placement.

结果：患者自螺钉置入后至发现椎弓根螺钉误置时间为5~69 d，平均18.5 d。其中螺钉穿破椎弓根外侧皮质7例，穿破椎弓根内侧皮质4例，螺钉穿破椎弓根皮质2例，螺钉置入过深2例，螺钉进入椎间孔2例，进入椎间隙2例。

The structure analysis indicates that the reverse symmetry ligand H4LB molecules are linked into a 2D supermolecular network by two types of hydrogen bonds. One type occurs between the oxalamide oxygen group and the phenol hydroxyl qroup of the nearest molecule with d=2.906(2) and ∠O-H…O=151.8°. The other type is between the oxalamide nitrogen group and the oxalamide oxygen group of anther molecule with d=2.849(2),∠N-H…O=158.7°.

晶体结构研究表明配体H4L为顺式桥联分子，晶体中存在两种氢键，一种是草酰胺基团的O原子与苯环上的酚羟基形成O-H…O氢键[d=2.906(2)，∠O-H…O=151.8°]；另一种是草酰胺基团的氨基与相邻草酰胺基上的O原子形成N-H…O氢键[d=2.849(2)，∠N-H…O=158.7°]，通过上述两种氢键将化合物H4LB连接成二维网络结构。

In a DMF solution of CuCl〓-ethanolamine-acetic acid (1: 2: 2), 27 formed a highly oxidized heterocyclic compound 2-hydroxymethyl-naphtho [1, 2-a] oxazole (30) by the carbon-nitrogen coupling and carbon-oxygen coupling with the ligand of ethanolamine, which brings a chance to develop a novel approach to this heterocyclic compound via one-pot reaction of phenols under mild condition.

在氯化铜—乙醇胺—乙酸（1：2：2）的DMF溶液中，27与配体乙醇胺发生碳氮偶合与碳氧偶合，生成深度氧化的杂环化合物：2-羟甲基-萘并[1，2-a]〓唑（30）。这可望为酚类一锅化直接转化为30及其类似物提供一种简便的新合成路线。

Results In 22 patients after injected PAHG, 3 cases (6 breasts) were normal, 7 cases (10 breasts) were stiffened, 8 cases (12 breasts) found callocity. MRI also showed 2 cases (2 breasts) of pectoralis major myositis and 2 cases (2 breasts) of concomitant mammary fibroadenoma.

结果：22例病例中，3例（6只）注入物所形成的乳房形态、柔软度正常，7例（10只）变硬，8例（12只）硬结，2例（2只）胸大肌炎，2例（2只）伴发乳房纤维瘤。

Spikelets 3–5(–6) mm, dark purple; glumes lanceolate, subequal or lower glume slightly shorter than upper, lower glume 1-veined, upper glume 3-veined, scabrid, apex acuminate; callus hairs ca. 1/3 length of lemma; lemma 3–4.5 mm, papery, hyaline at margins and apex, sometimes scabrid; apex irregularly 4-toothed; awn arising from upper 1/3 of lemma back or above, 1–2.5(–6) mm, straight or slightly curved; palea ca. 2/3 as long as lemma; rachilla conspicuously penicillate, 1.5–2 mm, including hairs up to 5 mm. Anthers 1.4–2.3 mm.

小穗3-5(-6)毫米，深紫色；披针形的颖片，近等长或下部颖片稍短于上面，下部颖片1脉，3脉，粗糙的上面颖片，先端渐尖；约的胼胝体毛1/3段外稃；外稃3-4.5毫米，似纸，透明的在边缘和顶，有时粗糙；不规则的先端4齿；芒生于上面外稃背面或在上部的1/3，1-2.5(-6)毫米，直或稍弯曲；大约2/3的倍于外稃的内稃；显著具毛撮的小穗轴，1.5-2毫米，包括头发可达5毫米花粉囊1.4-2.3毫米。

Alkyl manganese pentacarbonyl compounds5MnR (R = CH3, p-CH2C6H4CH3, p-CH2C6H4OCH3) were synthesized by metalation of manganese pentacarbony potassium salt with corresponding alkyl halides in ether. Photolysis of these with 1-2 equivalent of (CH3)2(C6H5)SiH or (CH3)(C6H5)2SiH in C6D6 solution at 5℃ produces silyl manganese pentacarbonyl compounds5MnSi(C6H5)(CH3)2 and5MnSi(C6H5)2(CH3) respectively (yield 70-88%).

用五羰基锰钾盐和相应的卤代物在乙醚中的金属化反应合成了五羰基锰烷基合物5MnR（R = CH3，p-CH2C6H4CH3， p-CH2C6H4OCH3 ），产率达到72-93％，将这些化合物与1-2当量(CH3)2(C6H5)SiH和(CH3)(C6H5)2SiH的C6D6溶液在5℃光解，分别得到五羰基锰硅烷基化合物5MnSi(C6H5)(CH3)2和5MnSi(C6H5)2(CH3)（产率达到70-88％）。

32 Patients over 50 years old (range 50～63) received surgical treatment.concomitant cardiac anomalys:tricuspid regurgitation in 18 patients,mitral valve regurgitation in 8,atrial tibrillation in 6,CAD in 2.preoperative ment pulmonary arterypressure Was(40.98±8.52)mmHg.All of the patients underwent Dacron or pericardia patch,18 TVR and 6 MVR,2MVP,2 patients with artrial fibrillation underwent right sided maze pricdure,and 2,CABG.

其中合并三尖瓣中重度返流18例、二尖瓣关闭不全8例、房颤6例、冠心病2例；肺动脉平均压力49.08±8.52，最高65mmHg；心功能三级10例、四级2例，采用心包补片或涤纶补片补缺损，同期行三尖瓣成形18例、二尖瓣成形术6例、二尖瓣置换术2例、右房迷宫术2例、冠状动脉搭桥术2例。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐