查询词典 2-butene

For investigations on the modified character of 1, 2 - polybutadiene (1,2 - PB), the structure changes of natural rubber/ 1,2 - PB blends under thermal oxygen process with chemical stress relaxation and Flory 's theory of crosslinking structure were studied and compared with those of NR/styrene-butadiene rubber and NR.

用化学应力弛豫法和Flory交联网络理论分析了在热氧作用下天然橡胶／1，2－聚丁二烯（NR／1，2－PB）共混物硫化胶的网络结构特征，并与NR／丁苯橡胶、NR硫化胶作了对比，以考察1，2－PB对NR／1，2－PB共混物老化性能的影响。

According to several years practice, comprehensively sum up measures of forcing culture technology of scale and dwarf on potted Bougainvillea as: a propagation of cuttage, which choose a mixture of 50%peat, 33% vermiculite and 17 sharp sand as cutting soil, and choose a semi-wooden shoot cut into 5~10cm length with 2~3 leaves as cuttings then touch 1% AA root powder, is lower cost and higher survival rate than that of tissue culture; Bougainvillea growth can be efficaciously regulated by pruning and using 2~5g/L PP333; bougainvillea can be induced to flowers by spraying 2.5~4.0g/L B9 and administering no more 11 hours daylight every day continuously; the florescence can be more prolonged about 20 days by spraying 50mg/L NAA while selling; and prevention and cure of pest and disease, etc.

根据多年的生产实践，从科学育苗、栽培管理、售前处理和病虫害防治等方面综合总结了叶子花的规模化矮化促成生产技术措施：选择泥炭土、蛭石和黄沙按3：2：1比例混合均匀的扦插基质，采用半木质化当年生枝条，剪成5~10cm长的2~3叶节一段，沾染1%自制生根粉的扦插育苗较组培育苗成本低，成活率高；结合修剪用2~5g/L的多效唑进行叶面喷洒能有效控制生长，矮化植株；选择2.5~4.0的丁酰肼叶面喷洒和每天保持不多于11h的短日照处理，能有效促进开花；销售前全株喷洒脱50mg/L NAA可延长花期20天左右；整个生产过程加强肥水管理、温湿度控制和环境清洁能有效防治病虫害发生。

Based on the project of reinforced gabion wall in west line of Xiangtan-Hengyang expressway in Hunan province,large scale pull-out tests on the interface friction characteristics between double twisted hexagonal gabion mesh(2.2 mm and 2.7 mm respectively) and red sandstone were carried out.

以湖南湘潭至衡阳高速公路西线加筋格宾挡墙为工程依托，通过大尺寸的拉拔试验，研究了钢丝直径分别为2.2 mm和2.7 mm的2种双绞合六边形金属格宾网与红砂岩的界面摩擦特性。

The same compounds can be characteristic compounds of Curculionidae and were 1,2- Benzenedicarboxylic acid, decyl hexyl ester, n-Eicosane and 1,2,4-Benzenetricarboxylic acid, 4-dodecyl dimethyl ester.

两种害虫蜡层和护蜡层共有成分分别是：1，2-苯二甲酸-1，2-（2-甲基-1）-丁醇二酯、正二十烷和1，2，4-苯三甲酸-（4-正十二醇酯）-1，2-甲二酯，它们可能具有象虫属的特征。

The OQO model 02 with pocketable ultra mobile form factor incorporates 1.2GHz or 1.5GHz VIA C7M VLA ultramobile processor, and features 30GB or 60GB hard drive shock-mounted with active drop detection, 512MB or 1GB DDR2 SDRAM, 5 800 X 480 native but interpolated up to 1200 x 720 indoor/outdoor readable LCD display, HDMI output for connectivity to HDTV displays or DVI monitors up to 1920 x 1200, VGA output through bundled VGA/Ethernet adapter for analog monitors up to 1920 x 1200, DisplaySense for detection and recall of external display settings, ergonomic thumb keyboard with SmartLock modifier keys on ergonomic backlit keyboard, mouse buttons and integrated track stick pointing device, integrated capacitive TouchScrollers for horizontal and vertical scrolling, integrated EV-DO WWAN for Sprint, WiFi 802.11a/b/g, Bluetooth 2.0 wireless with EDR with A2DP support, USB 2.0 port, 3.5mm audio out jack, line-in port, microphone port, integrated active digitizer with optional digital pen, up to 6 hours of battery life, embedded hardware AES encryption engine, integrated TPM 1.2.

该电脑模型02与超便携移动形式的因素，包含1.2 GHz主频，或1.5 GHz主频的经c7m vla超处理器，并具有30GB或60GB硬盘驱动器休克式与积极的下降检测， 512MB或1GB的DDR2 SDRAM ， 5 800 × 480 ，但本土插值高达1200 x 720户内/户外可读的LCD显示器， HDMI输出连接到HDTV显示器或DVI显示器最多为1920 x 1200 ， VGA输出，通过捆绑的VGA /以太网适配器模拟监视器最多为1920 x 1200 ， displaysense检测和还记得对外显示设置，符合人体工程学拇指键盘与smartlock修改键就人体工学背光键盘，滑鼠按钮和综合的轨道，坚持指向装置，集成电容touchscrollers为水平和垂直滚动，综合的EV - DO ，为Sprint的无线广域网，无线网络的802.11 a /的B /克， Bluetooth 2.0无线与EDR的与您需要的支持， USB 2.0端口， 3.5毫米音频输出端子，线在港口，麦克风端口，集成的数字化仪积极与任择数字笔，最多6小时的电池寿命，嵌入式硬件AES加密引擎集成TPM的1.2。

Six derivatives of 4-phenyl-3-phenoloxymethyl-5-mercapto-1,2,4-triazlyole were synthesized from phenoloxyacetyl hydrazide by two-steps reaction under microwave irradiation, then reacted with 2-chloroacetic acid to give six novel derivatives of 2-(3-phenoxymethyl-4-phenyl-[1,2,4]triazole-5-thio)-acetic acid.

在微波辐射条件下，芳氧乙酰肼经两步反应制得4-苯基－3-芳氧甲基－1，2，4-三唑－5-硫酮衍生物，再与氯乙酸反应得到6种尚未见文献报道的2-（3-芳氧甲基－4-苯基－1，2，4-三唑－5-硫基）乙酸衍生物。

The hydrolyte-salt was reduced 0.29g/kg by phosphogypsum and the organic was increased 28.89mg/kg by chicken manure.5. The pH was reduced by the distiller's grain of 9kg/m~2;the organic and hydrolyte- nitrogen were increased by the distiller's grain of 6kg/m;the exchangeable sodium percentage was reduced by the distiller's grain of 3kg/m;the effectual- phosphorus was increased by the chicken manure of 3kg/m;the hydrolyte-salt was reduced by phosphogypsum of 0.6kg/m~2 were patency.

剂量为9kg/m~2的酒糟降低土壤pH值最明显；剂量为6kg/m~2的酒糟增加土壤有机质和水解性氮含量最多；剂量为3kg/m~2的酒糟降低土壤碱化度最显著；剂量为3kg/m~2的鸡粪增加土壤有效磷含量最多；剂量为0.6kg/m~2的磷石膏，降低土壤水溶性盐含量最显著。

Isolates from watermelon-growing areas were classified into 3 races like race 0, race 1 and race 2 which were 8 (17.4), 30 (65.2), and 8 (17.4%), respectively. Pathogenecity of race 0 isolates are weakest which only make Sugar Baby susceptible; isolates of race 1 are intermediately pathogenetic, they make Sugar Baby and Charleston susceptible Gray but Calhoun Gray resistant; isolates belonging to race 2 possess the strongest pathogenecity, which make 3 hosts susceptible. Isolates of race 0 mainly distribute over the central and southern Hebei province, whereas race 2 cover the middle and north of Hebei, isolates of race 1 exist in the whole watermelon-growing areas in Hebei province.

根据鉴别寄主对供试菌系的抗感反应，将46个西瓜枯萎病菌系划分为0号、1号和2号3个不同的生理小种，分别包括8，30和8个菌系，占供试菌系的17.4%、65.2%和17.4%；0号生理小种菌系致病性最弱，仅使品种Sugar Baby感病，以冀中和冀南居多；1号生理小种菌系致病力中等，使鉴别寄主Sugar Baby和Charleston Gray感病，而使Calhoun Gray抗病，分布在整个河北省西瓜种植区；2号生理小种的菌系致病力最强，使3个鉴别寄主均能感病，主要分布在冀中和冀北。

It was known that pyridine and Triton-x100 had a bad effect on the cell growth and lycopene production were studied. The results indicated that pyridine and triton-x100 inhibited cell growth and lycopene synthesis;β-ionone increased cell growth and lycopene synthesis when the concentration was 0.05 ml/L, but when the concentration became higher, there would be a decrease on the lycopene output; span-20 increased cell growth and lycopene synthesis effectively when the concentration reached 2.0ml/L, and the lycopene yield became 2.4×10~(-2) mg/L which was 3-fold than control.

研究了培养基中加入不同浓度的小分子效应物吡啶、Triton-x100、Span-20、β-紫罗酮、异烟肼对番茄红素产量的提高作用，结果显示培养基中加入很低浓度的吡啶(0.1ml／L)就会对菌体产生很强的毒害作用；triton-x100对类胡萝卜素的合成也有很强的抑制作用，试验的浓度为0.2ml／L到5ml／L，结果发现它对菌体的生长和番茄红素的合成都有抑制作用；β-紫罗酮在浓度为0.05ml／L时有很小的促进作用，而浓度升高就有了比较强的抑制效果；span-20在液体培养基中的加量为2.0ml／L时，对番茄红素的合成有很强的促进效果，产量达到了2.4×10~(-2)mg／L，比原始菌株产量提高了2倍，而浓度进一步增大就产生了很强的抑制效果。

Results Acute oral LD50 were 278 mg/kg and 56.2 mg/kg in rats and mice respectively, while dermal LD50＞2 000 mg/kg and inhalative LC50＞3 000 mg/m3. Skin and eye irritancy were estimated to be negative and mild respectively. Cumulative coefficient was 2.3 and allergic rate was 0%. A negative result was observed in Ames assay while increased frequencies of bone marrow micronuclei and spermatocyte chromosome aberrations were noted in the high dose (11.24 mg/kg) group.

结果 大小鼠急性LD50分别为278 mg/kg和56.2 mg/kg；大鼠经皮LD50＞2 000 mg/kg；急性吸入LC50＞3 000 mg/m3；无皮肤刺激性，轻度眼刺激性；蓄积系数2.3；致敏率为0；Ames试验结果阴性；微核和染色体在高剂量组(11.24 mg/kg)与阴性对照组相比有高度显著性差异(P＜0.01)；大鼠90天亚慢性经口的最大无作用剂量为2.825 mg/kg。

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