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弱吸收峰
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  weak absorption peaks
     The calculated results reveal that there exist weak absorption peaks above 400 nm for these C60 derivatives, which agrees with the experimental results.
     计算结果表明, 目标分子在400 nm 以上均存在弱吸收峰, 与实验所得结果一致。
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  weak peaks
     DTA curve shows two strong endothermic peaks at 249 and 702℃ and two weak peaks at 278 and 826℃.
     差热分析显示,在249和702℃处有两个强吸收峰,在278和826℃处有两个弱吸收峰
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  “弱吸收峰”译为未确定词的双语例句
     Absorbance spectra of GAD showed one weak peak at 420nm, it was produced by the binding of PLP.
     米胚GAD的紫外-可见光谱特征为除280nm以下与蛋白质有关的吸收峰以外,420nm处有一个弱吸收峰,这是PLP与米胚GAD主链结合后产生的吸收峰。
短句来源
     The band at 20.8×10~3 cm~(-1)is noticeably unsymmetrical and can be deconvoluted to show a very weak band at 23×10~3cm~(-1).
     峰值为20.8×10~3cm~(-1)的吸收带明显地不对称。 可能有一个频率为23.0×10~3cm~(-1)的弱吸收峰未被观察到。
短句来源
     The monohydroxycholanic acids have absorption maximum at 310 nm, dihydroxycholanic acids a strong maximum at 310 nm and a weaker maximum at 390 nm,but trihydroxycholanic acids a strong maximum at 390 nm and a weaker maximum at 310 nm.
     一羟胆烷酸最大吸收峰在310nm处,二羟胆烷酸除在310nm处有一强吸收峰外,在390nm处还有一弱吸收峰; 三羟胆烷酸在390nm处有强吸收峰,310nm处有一弱吸收峰
短句来源
     Besides an absorption peak around 449 nm, there were in turn three other absorption peaks around 414, 415, 419 nm in midgut cytochrome P450, thereafter the absorption disappeared, and there was a weak absorption at 420 nm at the thirty-first scan. In the absorption spectrum of cyt-P450 bound with n-butanol, two peaks and two troughs occurred for midgut preparation and one peak and one trough in fat body preparation.
     中肠cyt P45 0除了在 45 0nm附近存在一个吸收峰外 ,在通入CO后依次在 414、 415、 418nm附近出现吸收峰 ,随后该峰消失 ,随着时间的推移 (第 31次扫描 )在 42 0nm处又开始出现一个弱吸收峰
短句来源
     Spectral analysis was performed on the GAD to research its further properties. Absorption spectrum of GAD shows one weak peak appears at 420 nm, it is produced by the binding of pyridoxal-5′-phosphate (PLP).
     紫外-可见光谱特征为420nm处的弱吸收峰,这是辅基PLP与米胚GAD主链结合后产生的;
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  相似匹配句对
     The UV spectrum of Ac-SPG reveals a weak CO absorption in the range of 252~272nm.
     其紫外-可见光谱在252~272 nm处存在一个的羰基吸收.
短句来源
     Single bonded CN and triple bonded CN were identifies by infrared absorption spectra.
     红外吸收光谱呈现C—N和C≡N的吸收
短句来源
     A study of wavelength shift on absorption peak
     关于吸收波长移动的探讨
短句来源
     It is, therefore, suitable for measuring weak absorption in dielectric thin films.
     它适用于介质薄膜的吸收测量。
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     Re-discussion on the missing order of multi-slit's and grating's diffracted spectra
     光栅缺级附近的两
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  weak peaks
The phase transitions occurring in this interval manifest themselves as breaks in the temperature behavior of the band spectral positions and weak peaks in the halfwidth and oscillator strength.
      
High-resolution 2D-NMR combined with 13C-labeling of the polymer greatly simplifies the 2D-NMR spectra, selectively enhances the weak peaks from low occurrence B-centered triad structures, and aids in their resonance assignments.
      
The vibrational spectra of Mg-majorite show a large number of additional weak peaks compared with the spectra of cubic pyrope garnet, consistent with tetragonal symmetry for the MgSiO3 garnet phase.
      
The NMR signals of the carbonyl and olefinic carbons of the oils of some species of palm show some relatively weak peaks at characteristic positions that have not been identified previously.
      
X-ray analysis of the sample with the highestTc shows a major phase with perovskite-like structure witha=3·820(1) ?;b=3·873(1) ? andc=11·659(2) ? along with several unidentified weak peaks.
      
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The purpose of this research is to study the natural hormones in the sprouts of Cunninghamia lanceolata (Lamb.) Hook. Samples were partitioned in solvents and isolated by cation exchange resins and DEAE-cellulose columns. The extracts were purified by paper and thin-layer chromatography and the fractions were verified by means of bioassay, with wheat coleoptile section being adopted for IAA and ABA, rice seedling for GAs, and radish cotyledon for cytokinins respectively. The results showed that there existed...

The purpose of this research is to study the natural hormones in the sprouts of Cunninghamia lanceolata (Lamb.) Hook. Samples were partitioned in solvents and isolated by cation exchange resins and DEAE-cellulose columns. The extracts were purified by paper and thin-layer chromatography and the fractions were verified by means of bioassay, with wheat coleoptile section being adopted for IAA and ABA, rice seedling for GAs, and radish cotyledon for cytokinins respectively. The results showed that there existed in the extracts only a little auxin and growth inhibitors but quite some GAs and cytokinins, with the activities of cytokinins being most prominent.

本文报道在杉木萌芽中存在的几种天然激素。杉芽的醇溶性部分通过阳离子交换树脂、DEAE纤维素柱与纸层析和薄层层析分离,并用小麦芽鞘法、水稻幼苗法、萝卜子叶法及苋红合成法分别对提取分离的各部分进行了生理效应测定。此外还进行‘厂化学鉴定和光谱测定。结果表明,杉芽中含有三大类生长促进物质——生长素,赤霉素、细胞分裂素。除了生长素的含量较低外,赤霉素和细胞分裂素的含量均较高,尤以细胞分裂素的效应最为突出。 经过多次试验,从硅胶GF_(254)薄层层析分离得到六个明显的荧光暗斑,其洗脱液经紫外光谱测定,观察到其中四个部分的吸收峰为270毫微米,与玉米素的吸收峰相一致。另两个部分的吸收峰为260毫微米,与腺嘌呤的吸收光谱相似。经生物鉴定,它们都有细胞分裂素活性。实验表明,杉芽中含有5—6种细胞分裂素类物质。这类激素与杉木很强的萌蘖性之间的关系,值得进一步研究。 从抑制物质含量来看,纸层析和生物鉴定的结果表明,只有Rt0.8—0.9区段出现较为明显的抑制效应。其纸谱浸提液经紫外光谱测定,在波长280毫微米处表现低弱的吸收峰,是一种不同于ABA的物质。这种物质在杉芽中的含量虽较低, 但具有抑制效应。

The characteristic ultraviolet absorption of ten kinds of free and conjugated bile acids in Minibeck reagent is observed. The monohydroxycholanic acids have absorption maximum at 310 nm, dihydroxycholanic acids a strong maximum at 310 nm and a weaker maximum at 390 nm,but trihydroxycholanic acids a strong maximum at 390 nm and a weaker maximum at 310 nm. The molar absorptivities of free and conjugated bile acids in one type are approximately equal under 310 or 390nm. The absorbance is in linear proportion to...

The characteristic ultraviolet absorption of ten kinds of free and conjugated bile acids in Minibeck reagent is observed. The monohydroxycholanic acids have absorption maximum at 310 nm, dihydroxycholanic acids a strong maximum at 310 nm and a weaker maximum at 390 nm,but trihydroxycholanic acids a strong maximum at 390 nm and a weaker maximum at 310 nm. The molar absorptivities of free and conjugated bile acids in one type are approximately equal under 310 or 390nm. The absorbance is in linear proportion to concentration of bile acids in Minibeck reagent below 5-10 mM, and it is stable at least for 48 hours under cold and dark storage. A trihydroxycholanic acid solution containing mono-or dihydroxy-cholanic acid maintains their original absorption feature, and has apeak value of additive property.Each component of bile acids could be calculated by the absorbance at 310 and 390 nm.

10种胆汁酸在Minibeck试剂中,40C保温后各有特征性紫外吸收出现。一羟胆烷酸最大吸收峰在310nm处,二羟胆烷酸除在310nm处有一强吸收峰外,在390nm处还有一弱吸收峰;三羟胆烷酸在390nm处有强吸收峰,310nm处有一弱吸收峰。同一种胆烷酸其游离型与结合型在310或390nm处的ε值相近。胆汁酸浓度在5~10mM以下时与吸光率呈直线关系,在低温避光条件下至少可稳定48小时。三羟胆烷酸溶液中含有一羟或二羟胆烷酸时,在Minibeck试剂中的紫外吸收图形特征不变,最大吸收峰值有叠加特点,各组份胆汁酸量能通过测定310nm及390nm吸光度计算求得,故可用作体液胆汁酸分析的基础。

The infrared(IR) absorption spectra and the ultraviolet (UV) absorption spectra of milled bagasse lignin (M.B .L .)have been investigated and considerable differences of IR and UV spectra between M.B.L. and picea jezoensis milled wood lignin(M.W L.) had been found.The absorption bands are appeared at 1270 cm-1 and 1040 cm-1 of IR spectrum of M.B.L.. These peaks are less than that of picea jezoensis M.W.L., which is considered to be due to the less presence of ether linkages of guaiacyls in M.B.L.. More syringyls...

The infrared(IR) absorption spectra and the ultraviolet (UV) absorption spectra of milled bagasse lignin (M.B .L .)have been investigated and considerable differences of IR and UV spectra between M.B.L. and picea jezoensis milled wood lignin(M.W L.) had been found.The absorption bands are appeared at 1270 cm-1 and 1040 cm-1 of IR spectrum of M.B.L.. These peaks are less than that of picea jezoensis M.W.L., which is considered to be due to the less presence of ether linkages of guaiacyls in M.B.L.. More syringyls exist in M.B.L., that is responsible for the appearance of a strong, absorption at 1333cm-1.At the IR spectra of M.B.L. there is no visible absorption band of carbonyl group which appeared at 1665-1670cm-1 in the case of picea jezoensis M.W.L.. However, absorption bands of ester at about 1175cm-1 and of ester carbonyl group at 1715cm-1 are present and they are dispersed when the M.B.L. was treated with alkaline solution, this fact shows that the conjugated ester bonds exist in M.B.L.The UV spectrum of M.B.L. is different from that of picea jezoensis M.W.L. which appeared an. absorption band at 280nm and a reduction of UV absorption above 290 nm after the reduction with sodium borohydride. The UV spectrum of M.B.L. is less changed after sodium borohydride treatment,but a peak at 280 nm and a shoulder at 300-315 nm are appeared on treating with sodium hydroxide, and it is proved that the M.B.L. does not contain much aldehyd'e and keto carbonyl groups as in M.W.L. but contains ester carbonyl groups.

本文研究了磨蔗渣木素(M.B.L.)的红外(IR)吸收光谱和紫外(UV)吸收光谱,发现它与鱼鳞松磨木木素(M.W.L.)的IR和UV光谱有很大的差别。 M.B.L.的IR光谱在1270cm~(-1)和1040cm~(-1)处显示出较鱼鳞松木素为弱的吸收峰,说明M.B.L.中愈疮木基的醚型连接的数量较少,在1333cm~(-1)处有强的吸收,表明M.B.L.中存在不少的丁香基。 M.B.L.的IR光谱缺乏鱼鳞松M.W.L.在1665—1670cm~(-1)区域的羰基吸收峰,但在1175cm~(-1)附近有酯的吸收峰和1715cm~(-1)处的共轭酯的酯羰基吸收峰。M.B.L.被碱处理后这些峰消失,显示出具有共轭酯的连接。 M.B.L的UV光谱与鱼鳞松M.W.L.不同。其UV光谱在280nm处显示吸收峰,且经硼氢化钠还原后UV光谱变化很少,但经碱处理后其UV光谱在280nm有峰,在300—315nm处有肩,这些都说明它不像鱼鳞松M.W.L.具有较多的醛和酮羰基,而是具有酯型的羰基。

 
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