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The Cardo structure could increase the solubility and thermal stability of the resultant polyimide.

通过在聚酰亚胺的主链中引入庞大侧基(9,9-二苯基芴)形成轴状聚酰亚胺,同时提高聚酰亚胺的溶解性和热稳定性;庞大的侧基又能阻止链的堆砌,避免生色团荧光链间淬灭;通过加入第二种二酐单体合成三元缩聚型聚酰亚胺,调控荧光性二酐在聚酰亚胺中的含量,降低生色团在聚酰亚胺中的浓度,来避免生色团荧光浓度淬灭,增加聚酰亚胺的固态荧光量子效率;通过使用热稳定性好的稠环生色团苝和吖啶来避免共轭类生色团(如含双键或三键的生色团)在高温下热交联及氧和水的破坏。

A new method using gel permeation chromatographic cleanup followed by high performance liquid chromatography-tandem mass spectrometry has been established for quantitative determination of Maleic hydrazide,Prowl and butralin residues in tobacco.

建立了用凝胶渗透色谱净化-液相色谱-串联质谱分析烟草中3种抑芽剂残留的方法。卷烟中的待测抑芽剂组分用V∶V=1∶1超声提取后通过凝胶渗透色谱净化;凝胶色谱柱为Biobeads S-X3玻璃柱(50 g,400 mm×25 mm),流动相为V∶V=1∶1溶液,流速5 mL/min;收集第10~25 min流出的液体用液相色谱色谱-三重四极杆串联质谱仪测定。

The second experiment is to fabricate white light LED from red and green phosphors pumped by blue light LED. The blue light LED we used in our experiment has the wavelength range between 450 and 452.5 nm, and the chip size is 17 mil *14 mil. There are two kinds white light LED we fabricated in the experiment. There are three blue light LED chips bonded in single package of both kinds package. The different of the both packages is mixed phosphor of encapsulation. One of the experimental devices was encapsulated YAG phosphor mixed silicone to fabricate white light. The other is red and green phosphor mixed encapsulation. The compared and focused parameter was luminous efficiency. YAG phosphor pumped white light has the luminous efficiency 72 lm/W, CRI 70, CIE(0.32, 0.33), CCT 5622°K at the operating current 60mA. On another hand, red and green phosphor pumped white light LED has the luminous efficiency 55 lm/W, CRI 90, CIE(0.31, 0.32), CCT 6479°K at the operating current 60mA. We fabricated the red and green phosphor pumped white light LED, and proved that it could has much higher CRI under similar compared conditions, CIE xy and CCT.

第二个实验是使用蓝光LED晶粒来制作白光元件,蓝光LED晶粒波段范围在450 ~ 452.5 nm,晶粒大小为17*14 mil,以三颗蓝光LED晶粒搭配YAG萤光粉(黄绿光 540 nm)制成白光元件,再以另外三颗蓝光LED晶粒搭配红色萤光粉(613 nm)混合绿色萤光粉(519 nm)制成的白光元件进行发光效率比较;搭配YAG萤光粉的白光元件在注入60 mA的电流时所量测到最大的发光效率是在72 lm/W,演色性数值大约为70,CIE色度座标为(0.32, 0.33),色温是在5622 °K;而搭配红色萤光粉混合绿色萤光粉的白光元件在注入60 mA的电流时,最大的发光效率在55 lm/W,演色性数值大约为90,CIE色度座标为(0.31, 0.32),色温在6479 °K;证明了蓝光LED晶粒搭配红色萤光粉混合绿色萤光的白光元件演色性指数可以高达90 以上的结果。

Chinese goods are printed barcode encoding center accreditation units, Zhejiang news publications designated printing units, Zhejiang Province, tobacco, drugs designated person with the printing units, Wenzhou City designated trademarks printing units, through the ISO9001: 2000 Quality Management System Certification enterprises. Completed in 2002 industrial output value 96 million yuan, plant area of 20,000 square meters, building area of 16,600 square meters, tall and spacious building has a modern plant, with the world's most advanced pre-press printing equipment Heidelberg Speedmaster CP2000 large for open four-color offset press 2 Units, Japan's Mitsubishi five-color offset press, one Taiwan, Japan's Mitsubishi four-color offset press 1 to open the four Units, as well as Canada Creo CTP system, one set, a higher degree of automation, automatic die-cutting machines, high-precision bound books folder gluer and other packaging equipment and printing equipment.

是中国物品编码中心条码印制资格认可单位、浙江省新闻出版物指定印刷单位、浙江省烟草、人用药品指定印刷单位、温州市指定商标印制单位、通过ISO9001:2000版质量管理体系认证企业。2002年公司完成工业产值9600万元,厂区面积20000平方米,建筑面积达16600平方米,建有高大宽敞的现代化厂房,拥有世界上最先进的印前印刷设备海德堡速霸CP2000型大对开四色胶印机2台、日本三菱五色胶印机一台、日本三菱四色四开胶印机1台,以及加拿大克里奥计算机直接制版系统1套、自动化程度较高的自动模切机、高精度糊盒机和书刊装订设备以及其它包装印刷设备。

The mid-temperature vinyl sulphone reactive dyes are the most commonly used in most of domestic dyeing factories at present. Owing to three prime color dyes are the basis of match dyeing ,the stability of the three prime colors property determines the performance of the matched color ,so it is very important to select a team of low cost three prime color dyes with high light-perspiration fastness .

目前国内染厂大多数染色都采用中温型含乙烯砜活性基的染料,由于染料三原色是进行拼色染色的基础,三原色性能的稳定与否决定着拼出的色相的稳定性,选择一组具有较高耐光汗复合色牢度且拼色性能较好的低成本三原色具有重要意义。

As to the high polarity, high boiling point resultant—trimesic acid, the analysis methods of infrared spetrum, gas chromatography-mass spectroscopy, vapour-phase chromatography, acid number titration and so on are seperately used to characterize its property. Infrared spetrum and gas chromatography-mass spectroscopy are used to have a qualitative analysis on the resultant and are compared with the stand diagram. Sulfuric acid-methanol esterification and rapid esterification are used to prepare the trimesic acid trimethyl-ester and have a FID quantitative analysis. So that we make sure the purity of trimesic acid in the resultant and also we have an acid alkali titration on the resultant to get its acid number, in order to verify the purity of trimesic acid in the resultant.

对于高极性、高沸点的固体产物均苯三甲酸,分别采用红外光谱、气质联用、气相色谱、酸值滴定等分析手段进行了表征:利用红外光谱、气质联用的方法进行产物的定性分析,并与在同一仪器、同一条件下做出的标准谱图进行比对;采用硫酸-甲醇酯化法和快速酯化法制备出均苯三甲酸三甲酯,对其进行气相色谱FID定量分析,进而确定固体产物中均苯三甲酸的纯度;用酸碱滴定法确定固体产物的酸值,以对固体产物中均苯三甲酸的纯度进行验证。

Based on the quantitative decolorizing investigation of the three-colour wastewater containing single reactive, dispersive, and vat dye, the manufacturing technology of decolorizing ceramsite was optimized, the mechanism of preparation and decolorization was discussed, and the strength, loss ratio and reusable method of the decolorizing ceramsite were studied.

通过对活性、分散、还原三种不同性质的三原色红、黄、蓝单一染料废水和实际印染废水的定量脱色研究,确定了印染废水脱色陶粒的最佳制备工艺,分析了其制备和脱色机理,考查了脱色陶粒的造粒强度和散失率,研究了脱色陶粒的循环使用性能和方法。

Low-boiling phenols in low-temperature coal tar are important chemical raw materials. For the identification and determination of the individual phenol boiling below 210℃ in the low temperature coal tar, the methods of gas chromatography, liquid-liquid chromatography followed by ultra-violet analysis and fractional distillation followed by infrared analysis were evaluated and compared.

随着煤炼油工业的发展,煤焦油中的酚类,特别是低級酚,作为化工原料的利用很重要,我們应用(1)气液色譜法,(2)液液色譜与紫外光譜法結合及(3)精餾与紅外光譜法結合三种不同方法对210°以前的低級酚进行了各种异构体的成分分析,比較分析結果:三种方法对同一样品进行分析时,最大絕对誤差在2%以内,其中以气液色譜法最为快速,液液色譜法次之,精餾-紅外光譜法費时間較多;但后二种方法所得数据較完全。

It also carries a silky coat on its flesh, which can sometimes be slightly wavy and comes in ruby, black and tan, tri-colour and Blenheim, which is a rich chestnut on a pearly-white background.

它还带有如丝般大衣其肉,这有时可能会略有波浪和来自红宝石,黑,火炭,三色和布伦海姆,这是一个丰富的板栗的珠光白色的背景。

Yeltsin's bier is laid down main central authority within church, the body covers a white blue red three-colour Russia national flag.

叶利钦的灵柩摆放在教堂内正中央,身覆一面俄罗斯白蓝红三色国旗。

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推荐网络例句

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气,收缩臀部肌肉;拱起身体,尽量抬起头来,右腿伸直朝向天花板(膝微屈,以避免肌肉紧张)。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化,但却比去年同期高8%。

However, to get a true quote, you will need to provide detailed personal and financial information.

然而,要让一个真正的引用,你需要提供详细的个人和财务信息。