查询词典 2-butene

Teflubenzuron was synthesized from 2,4-difluoronitrobenzene and 2,6-dichlobenil as starting reagent through six-step reaction with the yield of 75.3%.3,5-Dichloro-2,4-difluoroaniline was synthesized by chlorination,reduction reaction from 2,4-difluoronitrobenzene,the yield was 84.5%;2,6-difluorobenzamide with the yield of 87.7% was synthesized by fluoridation and hydrolysis from 2,6-dichlobenil.

以2，4-二氟硝基苯和2，6-二氯苯腈为起始原料，经过6步反应合成伏虫隆，总收率为75.3%。以2，4-二氟硝基苯为原料，经过氯化、还原反应合成3，5-二氯-2，4-二氟苯胺，产率为84.5%；以2，6-二氯苯腈为原料，经过氟化和水解，制得2，6-二氟苯甲酰胺，产率为87.7%；将Ⅱ与二碳酸酯酰化，合成2，6-二氟苯甲酰异氰酸酯，产率为91.3%；Ⅲ与Ⅰ加成，得到杀虫剂伏虫隆，产率为95%。

At the firstexperiment, when the Nitrogen valid content is 0kg/hm~2, the Phosphatevalid content is 112.5 kg/hm~2, the Kainite valid content is 112.5 kg/hm~2,the Sulphur valid content is 60 kg/hm~2, we can acquire the highestoil-content 45.87%. At the second experiment, when the nitrogen validcontent is 0kg/hm~2, the Phosphate valid content is 112.5 kg/hm~2, theKainite valid content is 112.5 kg/hm~2, we can acquire the highestoil-content 44.08%.

本试验条件下在低氮、中磷、中钾水平下可以获得较高的含油量；在第一次试验中当氮、磷、钾、硫的有效含量分别为0kg／hm~2、112.5kg／hm~2、112.5kg／hm~2、60 kg／hm~2时可以获得最高含油量45.87％；在第二次试验中当氮、磷、钾的有效含量分别为0kg／hm~2、112.5 kg／hm~2、112.5 kg／hm~2时可以获得最高含油量44.08％。

B Of the six basic media MS, MS1/2 (half-strength of MS salts and vitamins), WPM, DKW, B5 and SH, MS1/2 was the most proper one to induce somatic embryos. Somatic embryos generally regenerated directly from excised zygotic cotyledons. PGRs combination affected somatic embryogenesis significantly. Medium with NAA 1mg/L, TDZ 0.05mg/L, IBA 2—10mg/L combined with BA 10mg/L, or IBA 10mg/L integrated with BA 0-2mg/L gave the highest induction rate. Excised zygotic hypocotyls had the strongest potential to produce callus. Callus induction was also affected significantly by media and PGRs. The proper callus induction condition was MS1/2 medium containing NAA 1mg/L, IBA 10mg/L, BA 2-5mg/L and TDZ 0.05mg/L. Harvest period affect somatic embryogenesis significantly. Zygotic embryo explants collected from the end of July to the middle of August had strong potential to generate somatic embryos, when endosperm finished solidification, different parts of the embryos were completely formed, the size of embryos occupied about 2/3 of the embryo sac. Provided with optimized conditions, direct somatic embryogenesis rate can attain to 33. 68%, and callus induction rate of hypocotyls was up to 90.7%. Cytological observation on megasporogenesis and zygotic embryogenesis of Manchurian ash showed that the ovary was twicarpellum, twilocular with two ovules each loculus. The ovule was tenuinucellar and anatropous, with one megasporcocyte. The development of embryo sac is of the Polygoum type.

体细胞胚胎发生研究的结果表明：(1)成熟过程中的合子胚是诱导水曲柳体细胞胚胎发生的最佳外植体材料；(2)在所试验到的MS、MS1/2（将MS的所有成分均减半）、WPM、DKW、B〓、SH等六种基本培养基中，MS1/2是最适合诱导水曲柳体细胞胚胎发生的基本培养基；(3)水曲柳的体细胞胚胎发生以直接发生为主，体细胞胚主要来自于从合子胚分离的完整子叶；(4)培养基中的激素组合对水曲柳的体细胞胚胎发生有显著影响，诱导直接体细胞胚发生较好的激素组合有NAA 1mg/L+IBA 2，5，10mg/L+BA 10mg/L+TDZ 0.05mg/L和NAA 1mg/L+IBA 10mg/L+BA 0，2mg/L+TDZ 0.05mg/L；(5)合子胚分离的下胚轴具有最强的愈伤组织诱导潜力，少数愈伤组织可以分化出体细胞胚；(6)愈伤组织的诱导也受培养基和激素配比的显著影响，最适宜诱导的培养条件为MS1/2+NAA 1mg/L+IBA 10mg/L+BA 2，5mg/L+TDZ0.05mg/L；(7)采种时间对体细胞胚胎发生有显著影响。7月末到8月中旬的合子胚具有较强的体细胞胚发生潜力，此时种子尚未成熟，胚乳已呈固态，种胚的各个部分已分化完全，种胚体积占胚腔的大约2/3；(8)在各自综合的最适条件下，完整子叶的体细胞胚诱导率可达33.68%，下胚轴的愈伤组织诱导率可达90.7%。

Seed cones borne in groups of 1-6, globose or subglobose, 0.9-1.6(-2.5)× 1-2(-2.5) cm; cone scales 20-30, proximal 2 margins often convex in outline, or all 4 margins ± concave in outline, middle part with or without distinct shoulders at widest point, apex usually recurved, umbo rhombic, distally with 4 or 5(-7) toothlike projections 1-3.5 mm. Seeds 2-5 per cone scale, brown or dark brown, irregularly ellipsoid or multiangular and ± compressed, 4-6.5 × 2-3.5 mm; wings 0.2-0.25 mm wide.

1-6个中的成群忍受的球果，球状或近球状， 0.9-1.6(-2.5)* 1-2(-2.5)厘米；珠鳞20-30，轮廓的下部的2个边缘通常凸面，轮廓的或全部4个边缘多少凹面，有或没有在宽点的离生的肩的中部，先端通常下弯，鳞脐，上部每珠鳞具4或5(-7)种子2-5 1-3.5毫米的齿状预测， 4-6.5 * 2-3.5 毫米；翅0.2-0.25毫米宽。

Belgium.Results Among 81 HCV isolates from PHCs,there were 71 (87.6%) genotype 1b,4(4.9%)2a,2(2.5%)3b,1(1.2%)6a,2(2.5%) mixed genotypes (1 for 2a or 2c+2b+1,1 for 1b+6a) and 1(1.2%) undeterminable respectively,and among 7 from BDs,there were 5 1b and 2 genotype 2a.

结果 81份丙型肝炎患者HCV分离物中71份(86.7%)为1b型，4份(4.9%)为2a/2c型，2份(2.5%)为3b型，1份(1.2%)为6a型，2份(2.5%)为混合型(2a/2c+2b+1和1b+6a)，另有1份(1.2%)为未定型。7份献血员分离物中，5份为1b型，2份为2a型。

The lengths are as followe:S1 3.2±1.5 cm,S2 4.4±1.0 cm,S3 3.5±1.1 cm,S4 2.3±0.9 cm and S5 1.0±0.3 cm.The diameters follow:S1 1.2±0.7 mm,S2 2.5±1.5 mm,S3 2.5±1.5 mm,S4 1.7±1.5 mm and S5 0.9±0.6 mm,8.8% of the penetrating tributaries of basivertebral veins before the S4 vertebra were 2～4 mm in diameter,91.2%were 0.1～1.9 mm.

其长度平均：S1为3.2±1.5 cm，S2为4.4±1.0 cm，S3为3.5±1.1 cm，S4为2.3±0.9 cm，S5为1.0±0.3 cm；其直径平均：S1为1.2±0.7 mm，S2为2.5±1.5 mm，S3为2.5±1.5 mm，S4为1.7±1.5 mm，S5为0.9±0.6 mm.S4椎体前穿通支静脉口径2～4 mm占8.8%，0.1～1.9 mm占91.2%。

New ruthenium benzylidene complexes benzylidene[1,3-bis(2,6-dimethylphenyl)-4,5-dihydroimidazol-2-ylidene] [k~2-diphenylphosphinoacetato] monochlororuthenium (46), benzylidene[1,3-bis(2,6-dimethylphenyl)-4,5-dihydroimidazol-2-ylidene][k~2-3-propionato]monochlororuthenium (47), benzylidene[1,3-bis(2,6-dimethylphenyl)-4,5-dihydroimidazol-2-ylidene] [k~2-2-benzonato]monochlororuthenium (48) featured five-membered, flexible six-membered and rigidsix-membered chelating rings respectively are prepared by reactions of complex 41 withcorresponding sodium phosphino-carboxylates. It is confirmed by X-ray crystallographicanalysis that the coordination geometries of complexes 46 and 47 are distorted squarepyramids with phosphino-carboxylate ligands chelating to ruthenium, and the coordinationbetween ruthenium and benzylidene ligands are strengthened.

用二苯基瞵乙酸盐、二苯基膦丙酸盐、二苯基膦苯甲酸盐与钌卡宾配合物41反应合成了三个新的钌卡宾配合物：含五元膦-氧螯合环的1，3-二-(2，6-二甲苯基)-4，5-二氢咪唑基1-苯亚甲基--一氯合钌(46)、含六元柔性膦-氧螯合环的[1，3-二-(2，6-二甲苯基)-4，5-二氢咪唑基1-苯亚甲基--一氯合钌(47)及含六元刚性膦-氧螯合环的[1，3-二-(2，6-二甲苯基)-4，5-二氢咪唑基]-苯亚甲基--一氯合钌(48)。X射线单晶衍射分析证明，配合物46、47都为变形的四方锥构型，膦-氧与钌形成螯合配位，其中苯亚甲基与钌的配位得以加强。

Every treatment combination has 4 replications.(1)The germination indexes of the former are higher than that of the latter; the germination of the former is stimulated by NaCl density of 0.3 %, while that of the later is restrained by all kinds of NaCl density.(2)With increasing of temperature and PEG indesity,the order of germination rate and vigor of Bromus stamineus and Bromus inermis is decreaced.(3)Under treatment of broadcast sowing and plant density of 549kermels·m~(-2), Bromus stamineus has the highest bud rate, fresh weight, seed yield, while treated with 25cm row spacing and 412kermels·m~(-2) plant densities, tillers, plant height, growth rate increased to the top;(4) Under treatment of broadcast sowing and plant density of 549kermels·m~(-2), its growth rate is took second place, while treated with 15cm row spacing and 824kermels·m~(-2) plant densities, it has the highest seed yield

3撒播时，引进种在播种密度为549粒·m~(-2)处理下单位面积出苗率最高，分蘖数最多，鲜重最大，单株最高，种子产量最大；生长速度在播种密度为412粒·m~(-2)处理下生长最快，密度为549粒·m~(-2)处理下稍次之，结合方差分析可以初步确定它在撒播时的播种密度为549粒·m~(-2)；(4)条播时，在行距为25cm、播种密度为412粒·m~(-2)处理下单位面积分蘖数最多，鲜重最大，单株最高，生长速度最快；种子产量在行距为15cm、播种密度为824粒·m~(-2)处理下最大，在行距为25cm、密度412粒·m~(-2)处理下次之；结合方差分析，就3种规格的行距来说，引进美国无芒雀麦条播时的行距为25cm，播种密度为412粒·m~(-2)；就这两种播种方式来说，应该选择撒播。

Their structures were identified by physicochemical constant and spectral analysis (IR, UV, EI-MS, 1H-NMR, 13C-NMR, and HMBC). Results The compounds were identified from their ethanol extracts as: 6, 8-dihydroxy-2-[2-(3'-methoxy-4'-hydroxyl phenylethyl)] chromone and 6-methoxy-2-[2-(3'-methoxy-4'-hydroxyl phenylethyl)] chromone.

结果 从沉香乙醇提取物中分得2个色酮类成分，分别鉴定为6，8-二羟基－2-［2-（3'-甲氧基－4'-羟基苯乙基）］色原酮{6，8-dihydroxy-2-[2-(3'-methoxy-4'-hydroxyl phenylethyl)]chromone，Ⅰ}和6-甲氧基－2-［2-（3'-甲氧基－4'-羟基苯乙基）］色原酮{6-methoxy-2-[2-(3'-methoxy-4'-hydroxyl phenylethyl)]-chromone，Ⅱ}。

The main components were myristic acid (19.37%), palmitic acid methyl ester(7.56%), lascorbic acid 2,6dihexadecanoate(6.27%), 8,11octadecadienoicacid methyl ester(5.22%), heptadecane(4.82%), lauryl ethoxylate(2.98%), 2isopropyl5methyl1heptanol (2.62%), tetracosanoic acid methyl ester(2.12%),2ethyl2methyltridecanol (2.08%), et al.

其化学成分主要为肉豆蔻酸(19.37%)，棕榈酸甲酯(7.56%)，2，6十六烷基1抗坏血酸酯(6.27%)，8，11十八碳二烯酸甲酯（5.22%），十七烷（4.82%），十二烷基乙氧基醚（2.98%），2异丙基5甲基1庚醇(2.62%)，二十四烷酸甲酯（2.12%），2乙基2甲基十三醇（2.08%）等。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。