查询词典 2-butene

RESULTS: On day 2 after PH, oval cells began to proliferate around the portal area, and matrilin-2 deposition was observed in the hepatic sinusoids in the periportal area. On day 9, proliferating oval cells were present in the hepatic acini, and matrilin-2 upregulation was noted. On day 12, as oval cells differentiated to form hepatocellular nodules, matrilin-2 was distributed mainly in the periphery of the nodules, and little protein was present in the nodules.

结果： 肝脏部分切除术(partial hepatectomy， PH)后第2天，卵圆细胞开始向门静脉周围区域增殖， Matrilin-2主要出现在门静脉周围的肝窦状隙内；术后第9天，卵圆细胞进一步向肝实质内增殖， Matrilin-2表达增加；术后第12天，随着卵圆细胞分化为小肝细胞结节，大多数Matrilin-2位于结节周边，少数出现在结节内。

Compounds were identified by means of physic-chemical property and spectral data including three new compounds: platyphyllin A (1), neochlorgeniclatone (2),(2E,6Z)-2,6-dimethyl-8-O-β-D-glucosyl-2,6-octadienoic acid (3). The known compounds included cyclic diarylheptanoids, phenylic acid, ect.

从白桦叶的水提取物中，利用各种色谱分离手段(硅胶柱色谱、聚酰胺柱色谱、凝胶柱色谱及制备薄层色谱等)，分离得到28个化合物，通过理化性质及各种波谱数据(NMR，MS，IR，etc)鉴定了23个化合物的结构，其中新化合物三个：platyphyllin A(1)，新绿原酸内酯(neochlorgeniclatone，2)，(2E，6Z)-2，6-二甲基-8-O--2，6-辛二烯酸(2E，6Z-2，6-dimethyl-8-O-β-D-glucosyl-2，6-octadienoic acid，3。

The total synthese three natural compounds to explore enantioselective synthesis of flavanol: We use phloroglucin and 2, 4, 6-trihydroxyacetophone as starting materials to synthesis distenin in two ways; Resorcin was used to synthsis 2, 5-dimethoxymethoxyacetophone though 3 steps.

对黄烷醇化合物的立体选择性全合成进行了探索：以间苯三酚和2，4，6-三羟基苯乙酮为原料，尝试用两条路线对Distenin化合物进行了全合成研究；以对苯二酚为原料，经三步制得2，5-二甲氧甲氧基苯乙酮，与2，4，6-三甲氧甲氧基苯甲醛反应，经四步反应得到天然产物3，5，7，2′，5′-二五羟基黄烷关键中间体1-（2′，6′-二甲氧甲氧基苯）-3-（2&，4&，6-三甲氧甲氧基苯）丙烷-1R，2R-二醇83及其对映体84；简要介绍了EGCg类化合物的生物活性和研究概况。

Seven of them have not been reported.Their structures were confirmed by IR,~1HNMR,MS,and element analysis. 4.Meanwhile,the green methylation procedure of imides was developed by using dimethyl carbonate as methylation reagent.A series of imides,for example,phthalimide,3,4-dibromo-maleimide and succincide were used for substrates.The effects of DABCO(1,4-diazabicyclo [2.2.2]octane)and DBU(1,8-diazabicyclo[5.4.0]undec-7-ene)as a catalyst in this kind of reactions were investigated.2-Bromo-3-(1-methylindolyl-3-yl)-1-methyl-1H-pyrrole-2,5-dione was prepared by using dimethyl carbonate,which further expanded the use of dimethyl carbonate,as a green agent in organic synthesis.

在以硫酸二甲酯为甲基化试剂对3，4-二溴马来酰亚胺进行N-甲基化反应合成3，4-二溴-N-甲基马来酰亚胺的同时，以碳酸二甲酯为甲基化试剂，对3，4-二溴马来酰亚胺、邻苯二甲酰亚胺、琥珀酰亚胺等酰亚胺类化合物的N-甲基化反应进行了研究；考察了1，4-二氮杂双环[2.2.2]辛烷，1，8-二氮杂双环[5.4.0]十一碳-7-烯、碳酸钾和四丁基溴化铵等作为催化剂对碳酸二甲酯N-甲基化反应的反应时间和收率等的影响，并应用碳酸二甲酯为甲基化试剂，合成了N-甲基-3-溴-4-(1-甲基-吲哚-3)-马来酰亚胺。

Compared with plant density of 150×10^4 planta/hm^2, photosynthesis attenuation rate of traditional plant density of 450×10^4 plants/hm^2 increased by 25.2~43.5 percent point, photosynthesis yield and relative electron transport rate of them decreased 2.95%~20.68% and 10.66%~18.32%, respectively, and the proportion of the reception of photosynthesis active radiation increased upper the layer of flag leaf, and decreased the proportion received lower the layer of flag leaf.

播量为450万株／hm^2处理比150万株／hm^2处理旗叶的光合衰减率提高25.2~43.5个百分点，光合量子产量和相对电子传递速率分别降低2.95%~20.68%和10.66%~18.32%，群体上层的光截获量增加，中下部受光条件较差。

Trans-Blot Cells and Systems 170-3825 Trans-Blot Cell With Wire Electrodes and PowerPac HC Power Supply, 100120/220240 V, includes 2 gel holder cassettes, buffer tank, lid with power cables, 4 fiber pads, 1 pack precut blot absorbent filter paper (15 x 20 cm), power supply, power cord, instructions 170-3850 Trans-Blot System With Plate Electrodes and PowerPac HC Power Supply, 100120/220240 V 170-3853 Trans-Blot System With Plate Electrodes, Super Cooling Coil, and PowerPac HC Power Supply, 100120/220240 V, includes 2 gel holder cassettes, buffer tank, lid with power cables, 4 fiber pads, 1 pack precut blot absorbent filter paper (15 x 20 cm), power supply, power cord, instructions 170-3910 Trans-Blot Cell With Wire Electrodes, includes 2 gel holder cassettes, buffer tank, lid with power cables, 4 fiber pads, 1 pack precut blot absorbent filter paper (15 x 20 cm) 170-3939 Trans-Blot Cell With Plate Electrodes and Super Cooling Coil, includes 2 gel holder cassettes, buffer tank, lid with power cables, 4 fiber pads, 1 pack precut blot absorbent filter paper (15 x 20 cm) 170-3946 Trans-Blot Cell With Plate Electrodes, includes 2 gel holder cassettes, buffer tank, lid with power cables, 4 fiber pads, 1 pack precut blot absorbent filter paper (15 x 20 cm) Trans-Blot Cell Accessories 170-3912 Super Cooling Coil, required for all high-intensity transfers 170-3913 Gel Holder Cassette, includes 2 fiber pads 170-3914 Fiber Pads, 15.5 x 20.5 cm, 6 170-3920 Trans-Blot Standard Wire Electrode Card, cathode 170-3921 Trans-Blot Standard Wire Electrode Card, anode 170-3922 Trans-Blot Cell Buffer Tank 170-3923 Trans-Blot Cell Lid With Power Cables 170-3943 Trans-Blot Platinum Anode Plate Electrode 170-3944 Trans-Blot Stainless-Steel Cathode Plate Electrode 170-3945 Trans-Blot Plate Electrode Pair, platinum anode and stainless-steel cathode 16 规格:说明: Trans-Blot Plus

电泳转印槽组件 1。缓冲液槽及带有电缆的盖 2。凝胶支架转印夹 3。纤维衬垫 4。电极丝 5。电极板 6。特级冷却芯 Trans-Blot 转印槽是功能灵活的转印设备，可理想地用于多种转印应用。Trans-Blot 转印槽特点包括：*能进行多胶转印，可容纳3 块PROTEAN I xi 凝胶、6块Criterion 凝胶、12块Mini-PROTEAN 3 或Ready Gel 预制胶*多组参数灵活可设，可调节的电压设置（从30 V 的过夜转印到200 V 的1 小时快速实验）*电极间距设置为8 cm 用于标准印迹杂交，或设置为4cm 用于高强度印迹杂交*可选择板式电极：涂有铂金的钛作为正极，不锈钢为负极，能提供高强度电场和比其它电极更高的电流密度。或选择较经济的铂金电极丝*通过特级冷却芯和水循环仪来调节温度―是天然酶（4°C）或高强度转印的理想选择，随着转印时间增加（多达24 小时），不会引起缓冲液耗竭（在高强度转印中必须使用冷却芯，也推荐用于所有板式电极的应用）*带铰链的凝胶支架转印夹能避免滑动，确保凝胶与印迹膜间的紧密接触；每个转印夹都有颜色标记以保证在转印槽中的正确定位 Trans-Blot 转印槽的锁闭凝胶支架转印夹系统。转印夹（1）支撑凝胶（2）印迹膜（3）两侧有纤维衬垫和滤纸（4）确保凝胶三明治内的完全接触。凝胶夹垂直插入缓冲液槽中（5）。

In this paper four watery UV photoinitiators were studied and synthesized through a four-step process. They were l-(4-aminophenyl)-2-piperidino-1-propanone dihydrochloride, 1 -(4-aminophenyl)-2-morpholino-1 -propanone dihydrochloride, 1 -(4-aminophenyl)-2-diethylamino-1 -propanone dihydrochloride, 1 -(4-aminophenyl)-2-burylamino-1-propanone dihydrochloride, which have not been reported in any literatures till now.

本文通过四步反应合成了目前未见报道的四种水性紫外光引发剂：1-(4-氨基苯基)-2-哌啶基-1-丙酮盐酸盐、1-(4-氨基苯基)-2-吗啉基-1-丙酮盐酸盐，1-(4-氨基苯基)-2-二乙胺基-1-丙酮盐酸盐、1-(4-氨基苯基)-2-正丁胺基-1-丙酮盐酸盐。

Leaves 6–8 per ultimate branch; sheaths 6–9 cm, often white powdery; auricles inconspicuous; oral setae numerous, 2–3 mm; blade oblong-lanceolate or linear-lanceolate, 18–30 × 2–3.5 cm. Pseudospikelets fusiform, 2–3.5 cm, glabrous; prophyll ovate or ovate-lanceolate, 4–8 mm, thin, translucent, apex obtuse, keels 2, ciliate; bracts 1 to several, oblong to oblong-lanceolate, 7–22 mm, papery, many veined, apex obtuse to acute or mucronate; rachilla disarticulating.

每末级的分枝叶6-8；鞘6-9厘米，通常白色粉状；叶耳不明显；口头的刚毛多数，2-3毫米；叶片长圆状披针形披针形或线形， 18-30 * 2-3.5 纺锤形的厘米Pseudospikelets，2-3.5厘米，无毛；先出叶卵形或卵状披针形，4-8毫米，薄，半透明，先端钝，龙骨2，纤毛；苞片1到数个，长圆形到长圆状披针形，7-22毫米，纸质，很多脉，先端钝的到锐尖或短尖；小穗轴脱节。

In the third chapter, the synthesis of5-[(1"S)-1",2"-diacetyl-oxyethyl]-1-phenylpyrazol-3-carboxaldehyde oxime(2) from5-[(1"S)-1",2"-diacetyl-oxyethyl]-1-phenylpyrazol-3-carboxaldehyde(1) and phenyl-hydrazine were introduced firstly. The synthesis of nine dioxapyrrolino[3,4-c]pyrazoles containing chiral pyrazolyl moiety(6a-i) from 2 with N-substituted-phenylmaleimide by nonmetal oxidant IBD-initiated intermolecular 1,3-dipolarcycloaddition was described in detail.

第三章首先以5-[(1′S)-1′，2′-二乙酰氧基乙基]-1-苯基吡唑-3-醛(1)和苯肼为原料，合成了化合物5-(1′S)-1′，2′-二乙酰氧基乙基1-1-苯基吡唑-3-醛-苯腙(2)；再用化合物(2)与N-取代苯基马来酰亚胺反应，利用无金属氧化剂—IBD引发1，3-偶极反应，发生分子间的环加成，合成了9种新型手性吡唑连二氧代吡咯啉并

Computer simulation showed that the optimum fertilization combination for L. radiata was that N, P, K fertilizer amount were 422.4-702.2 kg/hm^2, 363.6-573.4 kg/hm^2, 299.9 kg/hm^2, respectively.

模型经计算机模拟寻优，对于试验地块上种植的石蒜鳞茎，氮、磷、钾因素的最佳施肥组合方案为：氮肥422.4~702.2 kg/hm^2、磷肥363.6~573.4 kg/hm^2、钾肥299.9 kg/hm^2。

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