熔点
- 与 熔点 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The results showed that PPC was a thermotropic liquid crystal and displayed the cholesteric banded texture. The reaction conditions had the distinct effects on the propoxy content and liquid crystal property of PPC, with the reaction temperature and content of propionyl chloride increased, the degree of substitution of propoxy increased at the beginning, then trended to steady. The transition temperature and range of liquid crystalline phase were changed with the DS of propoxy, as the DS of propoxy increased, the melt point decreased, and the liquid crystalline phase transition temperature range of PPC get wider.
结果表明,产物PPC具有明显的热致液晶性能,且呈现出胆甾型液晶的彩色条纹织构;反应条件对产物丙酰基含量和液晶性能有显著影响,随反应温度提高和丙酰氯用量增加,产物丙酰基的取代度先增大,后趋于稳定;其相转变温度和温域随丙酰基取代度改变而相应变化,随丙酰基的取代度增大,产物的熔点降低,液晶温度范围变宽。
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The results indicate that the introduction of bulky groups into the pyrazoline ring increases the glass transition temperature of the compounds and changes the luminescent mechanism of the compounds.
结果表明,在吡唑啉化合物的5位引入稠环取代基提高了吡唑啉化合物的熔点;同时,5位取代基的电位性质还影响着化合物的发光行为。
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Four symmetrical and asymmetrical pyrylium - squarylium cyanine dyes were synthesized.
合成了四个对称及不对称含叔丁基吡喃鎓方酸的菁染料,通过光谱和元素分析确定其结构,测定了它们的紫外-可见吸收光谱、熔点和溶解性能。
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Always recrystallize a product to constant melting point.
你总是可以通过对产物进行再结晶以得到恒定的熔点。
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Always recrystallize a product to constant melting point.
你总是可以通过对产物进再结晶以得到恒定的熔点。
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Take the melting point of the dry solid semicarbazone derivative and record the yield. If it is necessary to recrystallize the semicarbazone derivative, you may do so from an ethanol/water mixture.
测定干燥的缩胺基脲衍生物的熔点,并记录其产量,如果有需要将缩胺基脲衍生物进行再结晶的话,你可以用乙醇/水的混合物来进行。
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Take the melting point of the dry solid semicarbazone derivative and record the yield. If it is necessary to recrystallize the semicarbazone derivative, you may do so from an ethanol/water mixture.
测定乾燥的缩胺基脲衍生物的熔点,并记录其产量,如果有需要将缩胺基脲衍生物进行再结晶的话,你可以用乙醇/水的混合物来进行。
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A higher yield(about 80%) can be obtained when 0.20-0.25 mol/1 of TUPMA is refluxed in 0.5 mol/l of NaOH solution at 75℃for 8h.
该产物的熔点为165.3℃,MS、~1HNMR和IR综合分析的结果确认,该产物的结构是4-二(1,2,4-三唑-5-硫酮基)-1,5-苯二甲酸。
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The results show that molecules of PEO〓 have priority to locate at the interface of PVF〓/PVC to reforce their interaction when content of PEOx was less than saturated concentration in the interface , and PEOx joined into the PVF〓 phase and /or the PVC phase; the particles size of dispersed phase, PVC, became larger when C was more than Cs; the blend became miscible when C was much more than Cs.
结果表明,aPS与sPS的非晶区相容,共混物中不存在aPS的独立相区;共混物的熔点及长周期不随共混物aPS含量的变化而有所改变;sPS的纤晶结构单元没有变化,共混物结晶度下降,aPS处于sPS的纤晶之间;sPS为α-晶型,其晶胞结构参数在共混前后不变,aPS没有进入到sPS的晶胞中。
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Silicon powder, processed by high-quality silicon metal lump, is silver-gray or dark gray with high melting point, good heat resistance, high resistively and oxidation resistance.
金属硅粉采用优质工业硅加工而成。是银灰色或暗灰色粉末,其熔点高,耐热性能好,电阻率高,具有高度抗氧化作用。
- 推荐网络例句
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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.
每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。
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Maybe they'll disappear into a pothole.
也许他们将在壶穴里消失
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But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.
但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。